Multifunctional tool sharpener and grinding method

Abstract

The invention discloses a multifunctional tool sharpener and a grinding method. The multifunctional tool sharpener comprises a base, a lifting device, a sine fixing device, a double-sine fixing device, a two-way grooving device, a one-way grooving device and a grinding wheel device. A grinding wheel device is arranged in the middle of a base, a lifting device is mounted on one side of the base, a first moving part opposite to the lifting device is arranged on the other side of the base, and a two-way grooving device and a one-way grooving device are mounted on the first moving part; or one of the two-way slotting device and the one-way slotting device is arranged on the first moving part; a second moving part parallel to the first moving part is arranged on the lifting device; a sine fixing device and a double-sine fixing device are mounted on the second moving part; or a sine fixing device or a double-sine fixing device is alternatively mounted on the second moving part. According to the multifunctional tool sharpener and the grinding method, the grinding amount is accurate, the grinding angles of different face cutting edges are accurate and adjustable, the integration degree is high, the efficiency is improved, and loss is reduced, and planeness deviation is reduced.

Description

Technical Field

[0001] This invention relates to the field of machining technology, and more specifically to a multi-functional grinding machine and grinding method. Background Technology

[0002] In modern machining processes, various cutting tools are indispensable. For example, grooving cutters, worm gear cutters, threading cutters, etc.

[0003] The current status of cutting tools used in grooving is as follows: 1. Tool types: Currently, indexable carbide tools and high-speed steel sharpened tools are the main types; 2. Tool requirements: Multiple tools involved in the cutting process must be positioned under the same mounting reference, ensuring consistent tool angles and that the tool tips are aligned with a line. This ensures that the cutting edges of the tools are on a straight line during cutting. Existing grooving machine tools have the following defects: 1. Carbide indexable cutting tools: mainly used for planing 90° grooves, and the cutting angle is generally negative during the cutting process. The increased cutting force will cause vibration and accelerated tool wear; it will also cause difficulty in chip removal, increased cutting resistance, high cutting temperature and easy workpiece deformation. 2. High-speed steel sharpening tools: Currently, sharpening is mainly done manually. Due to the influence of the manual's skill level, it is difficult to ensure a high degree of consistency in the sharpening angle (consistent angle and consistent distance from the tool tip to the assembly positioning surface). Sharpening is even more difficult and results in greater wear when the angle is not 90°.

[0004] like Figure 1 The diagram shown illustrates the clamping state of a grooving machine for the cutting tool in existing technology, with the inner side of the fixture and the bottom of the tool serving as reference surfaces. Tool grinding is performed manually on the high-speed steel tool, with each section ground for comparison against the notch in the insertion module. Figure 2 As shown, the blade tip is centered by contacting the template before grinding. However, this method has a drawback: it ignores the deformation of the blade itself, treating the blade as an absolutely "straight" baseline. In reality, bending deformation of high-speed steel blades is common. After clamping the blade using it as a reference, issues such as... Figure 3 As shown, if the blade tip height is the same or different, situations A or B will occur, resulting in two or even more grooves being cut.

[0005] To address these issues, common solutions include thickening the tool body or using copper shims between the tool and the fixture to counteract the bending. However, these methods are inefficient and require repeated testing. Furthermore, when machining large volumes and frequent tool changes are necessary, tool installation, testing, and adjustment must be performed each time, which is time-consuming, labor-intensive, and lacks precision.

[0006] Furthermore, manually sharpening the cutting tools of grooving machines is difficult, inaccurate, and inefficient. The reason for these defects is that the tool sharpening is done manually on high-speed steel blades. Each section is sharpened and compared to the notch in the module, and then sharpened again after contact with the module to ensure the blade tip shape is as consistent as possible with the module. This results in inaccurate tool angles.

[0007] In particular, cutting tools need to have a rake angle and a cutting edge angle. In some work situations, it is necessary to ensure that the cutting edge angle is consistent, while in other usage scenarios, the two cutting edges need to maintain different angles. It is difficult to control the above precision during manual grinding.

[0008] Therefore, as Figure 4 The grooving machine blades shown are difficult to sharpen manually, resulting in poor precision and low efficiency.

[0009] In particular, to reduce resistance to the material and improve machining efficiency at the cutting tip, two symmetrical grooves need to be cut on the rake face. There is no readily available equipment to cut grooves on the rake face, and manual grooving results in high material loss. Carelessness can easily lead to asymmetrical grooves or grooves that go through the material.

[0010] On the other hand, such as Figure 5 The grooving machine cutter shown is difficult to cut two grooves for the reasons mentioned above. However, it is necessary to reduce the resistance between the cutting edge and the sheet metal to improve processing efficiency. Therefore, cutting an arc groove at the cutter tip at an angle reduces the processing difficulty and achieves the same function. At the same time, the problems of inaccurate position and uncontrollable depth of manual sharpening still exist.

[0011] Furthermore, for machining the worm gear, 40° angled carbide alloy tools are used. The cutting edge of these tools cannot be reused after sharpening due to wear. For example... Figure 6 The diagram shows a worm gear cutting tool with a 40° cutter angle. Because it's necessary to maintain a 40° cutter angle while controlling the deflection angles of the two secondary flank faces, manual re-grinding cannot precisely achieve the required angles. As a precision transmission component, the worm gear requires high-precision machining, such as... Figure 7 As shown, inaccurate machining of the cutting tool can lead to collision between the tool and the spiral groove. Similarly, for thread cutting tools, there are conventional 60° triangular thread cutting tools, 30° trapezoidal thread cutting tools, and 55° imperial thread cutting tools. Without grinding equipment, it is difficult to machine standard-compliant tools by hand.

[0012] Therefore, there is currently a lack of equipment and methods capable of precisely grinding various types of cutting tools. Summary of the Invention

[0013] To address the aforementioned problems, the present invention aims to provide a multifunctional grinding machine and grinding method that features precise grinding volume, adjustable grinding angles on different surfaces, high integration, improved efficiency, and reduced wear.

[0014] According to one aspect of the present invention, a multifunctional knife sharpening machine is provided, comprising: a base, a lifting device, a sine fixing device, a double sine fixing device, a bidirectional grooving device, a unidirectional grooving device, and a grinding wheel device; A grinding wheel device is set in the middle of the base, a lifting device is installed on one side of the base, and a first moving part is set on the other side of the base opposite to the lifting device. A bidirectional grooving device and a unidirectional grooving device are installed on the first moving part. Alternatively, a bidirectional grooving device or a unidirectional grooving device may be installed on the first moving part; A second moving part is arranged parallel to the first moving part on the lifting device; A sine wave fixing device and a double sine wave fixing device are installed on the second moving part; Alternatively, a sine fixing device or a double sine fixing device may be installed on the second moving part. The sine fixing device can be used for grinding and sharpening grooving tools, while the double sine fixing device can be used for grinding and sharpening grooving tools, worm gear cutters, and thread cutters. The bidirectional grooving device can be used to achieve bidirectional grooving of grooving tools, while the unidirectional grooving device can be used to achieve unidirectional arc grooving of grooving tools.

[0015] In some embodiments, the sine fixing device includes: a first mounting base, a first tool fixing assembly, a first rotating assembly, and a first sine adjustment assembly. The bottom of the first mounting base is connected to the second moving part, the top of the first mounting base is provided with the first sine adjustment assembly, the top of the first sine adjustment assembly is installed with the first rotating assembly, and the first tool fixing assembly is detachably fixed in the first rotating assembly. The first rotating component adjusts the grinding angle of the tool's flank face, and the first sine adjustment component adjusts the grinding angle of the tool profile angle. The sine fixing device allows for precise adjustment of any cutting edge angle for grinding, while the first rotating component allows for precise adjustment of any rake angle. Grinding of the tool is achieved by pushing the first mounting base onto the second moving part.

[0016] In some embodiments, the first sine adjustment assembly includes: a first mounting bracket, a first rotating shaft, a first connecting block, a first contact block, a first mounting platform, and a first gauge block. The bottom of the first mounting bracket is fixedly connected to a first mounting seat. Both ends of the first rotating shaft are placed inside the first mounting bracket. One end of the first connecting block is fixedly connected to the first rotating shaft, and the other end of the first connecting block is fixedly connected to the first contact block. The first mounting platform is disposed in the middle of the first rotating shaft. A first rotating assembly is disposed on the first mounting platform. Several first gauge blocks are provided, and one or more first gauge blocks are placed at the bottom of the first contact block to adjust the angle of the first mounting platform. By using the first rotating shaft as a fulcrum and adding the first gauge blocks at the bottom of the first contact block, the angle of the first mounting platform can be precisely controlled, thereby enabling precise adjustment of any cutting edge angle for grinding.

[0017] In some embodiments, the first mounting bracket has two parts that respectively fix the two ends of the first rotating shaft. A first mounting hole is provided at the center of the first mounting bracket, and the end of the first rotating shaft is placed in the first mounting hole. The first mounting bracket is divided into upper and lower parts, which are connected by bolts to secure the first rotating shaft. By loosening the bolts using the first mounting bracket, the rotation angle of the first rotating shaft can be adjusted without limitation. After the angle adjustment is completed, the bolts are tightened to fix the position of the first rotating shaft, ensuring stable processing.

[0018] In some embodiments, a first spring is provided between the first connecting block and the first mounting base. A first screw passes through the first connecting block and the first mounting base, and the first spring is located between the top of the screw and the first connecting block. The first spring presses the first contact block towards the first mounting base. The first spring provides a downward force to ensure that the first contact block and the first gauge block are always in contact.

[0019] In some embodiments, the first rotating component includes: a first rotating block and a first limiting groove, the bottom of the first rotating block is connected to the first mounting platform and can rotate on the surface of the first mounting platform, and the first limiting groove fixes the first rotating block to the first mounting platform by bolts; The first limiting groove is provided with at least two; The first limiting groove is an arc-shaped groove; The first rotating block has a second mounting hole in the middle. The first tool fixing component is inserted into the second mounting hole. The cross-section of the second mounting hole is the same as the cross-section of the first tool fixing component. A bolt extends from the outside of the first rotating block into the second mounting hole and abuts against the first tool fixing component. The first limiting groove can control both the rake angle and limit the position of the first rotating block. Multiple first limiting grooves ensure the stability of the first rotating block, while the arc-shaped groove limits the rotation angle of the first rotating block, allowing for quick angle adjustment.

[0020] In some embodiments, the first tool fixing assembly includes: a pressure block, a first fixing groove, a first limiting wedge and a first fixing part. The pressure block has a through first fixing groove at its center. The tool is inserted into the first fixing groove and its front end extends out of the pressure block. The first limiting wedge is installed in the first fixing groove and contacts the tool. The first fixing part extends from the outside of the pressure block into the first fixing groove and abuts against the tool to limit the position of the tool. The pressure block includes a first positioning surface and a second positioning surface, which are symmetrically arranged. The first positioning surface or the second positioning surface serves as the reference surface for the first tool fixing assembly; The first and second positioning surfaces are V-shaped surfaces. The installation datum is determined during sharpening by the cooperation of the first fixing groove, the first limiting wedge, and the first fixing part. This ensures that the center of each sharpened tool is consistent after it is installed on the grooving machine, thus offsetting the influence of tool body bending deformation. The consistency of the datum after flipping and sharpening the first and second positioning surfaces improves processing efficiency, and the V-shaped surface ensures the accuracy of rapid installation contact.

[0021] In some embodiments, the cross-section of the first fixing groove is a right trapezoid formed by the first reference plane, the second reference plane, the first inclined plane, and the first top surface. The first reference plane is opposite to the first inclined plane, the second reference plane is opposite to the first top surface, and the first reference plane and the second reference plane are arranged perpendicularly. The first and second reference surfaces serve as reference surfaces for tool grinding; the first limiting wedge contacts the first inclined surface, pressing the tool against the first reference surface. The first and second reference surfaces ensure that the reference surfaces are the same during tool processing and installation on the grooving machine, ensuring that the cutting centers of all tools are consistent.

[0022] In some embodiments, the first fixing part includes: a first threaded hole, a first bolt, a second threaded hole and a second bolt. The first threaded hole is correspondingly disposed above the second reference surface. The first bolt is connected to the first threaded hole. The first bolt passes through the first threaded hole and abuts against the tool from the top surface and presses the tool against the second reference surface. The second threaded hole is correspondingly located above the first limiting inclined block. The second bolt is connected to the second threaded hole. The second bolt passes through the second threaded hole and abuts against the first limiting inclined block from the top surface, pressing the first limiting inclined block against the second reference surface. The first limiting inclined block compresses the cutting tool to move towards the first reference surface. The first threaded hole and the first bolt are provided in at least two sets, and the second threaded hole and the second bolt are provided in at least two sets. The first bolt and the second bolt are used to achieve the function of fastening and fixing.

[0023] In some embodiments, the dual sine fixing device includes: a second mounting base, a tool sine mounting assembly, a second rotating assembly, and a second sine adjustment assembly. The bottom of the second mounting base is connected to a second moving part, the top of the second mounting base is provided with the second sine adjustment assembly, the top of the second sine adjustment assembly is mounted with the second rotating assembly, and the tool sine mounting assembly is detachably fixed to the second rotating assembly. The second rotary assembly adjusts the grinding angle of the tool's flank face, the second sine adjustment assembly adjusts the grinding angle of the tool profile angle, and the tool sine mounting assembly controls the grinding angle of the tool's flank face deflection angle. The second sine adjustment assembly allows for precise adjustment of any tool profile angle for grinding, the second rotary assembly allows for precise adjustment of any flank face angle, and the grinding of the tool is achieved by moving the second mounting base on the second moving part. The tool sine mounting assembly adjusts the deflection angles of the two secondary flank faces of the tool.

[0024] In some embodiments, the second sine adjustment assembly includes: a second mounting bracket, a second rotating shaft, a second connecting block, a second contact block, a second mounting platform, and a second gauge block. The bottom of the second mounting bracket is fixedly connected to a second mounting seat. Both ends of the second rotating shaft are placed inside the second mounting bracket. One end of the second connecting block is fixedly connected to the second rotating shaft, and the other end of the second connecting block is fixedly connected to the second contact block. The second mounting platform is disposed in the middle of the second rotating shaft. A second rotating assembly is disposed on the second mounting platform. Several second gauge blocks are provided, and one or more gauge blocks are placed at the bottom of the second contact block to adjust the angle of the second mounting platform. By using the second rotating shaft as a fulcrum and adding second gauge blocks at the bottom of the second contact block, the angle of the second mounting platform can be precisely controlled, thereby enabling precise adjustment of any blade angle for grinding.

[0025] In some embodiments, the second mounting bracket has two parts that fix the two ends of the second rotating shaft respectively, and a third mounting hole is provided in the center of the second mounting bracket. The end of the second rotating shaft is placed in the third mounting hole. The second mounting bracket is divided into upper and lower parts and is connected by bolts to hold and fix the second rotating shaft. A spring is installed between the second connecting block and the second mounting base. A screw passes through the second connecting block and the second mounting base, and the spring is positioned between the top of the screw and the second connecting block. The spring presses the second contact block towards the second mounting base. The second mounting bracket allows for unrestricted rotation and angle adjustment of the second rotating shaft when the bolts are loosened. After angle adjustment, tightening the bolts secures the position of the second rotating shaft, ensuring stable machining. The spring provides a downward force to ensure constant contact between the second contact block and the second gauge block.

[0026] In some embodiments, the second rotating component includes: a second rotating block and a second limiting groove, the bottom of the second rotating block being connected to the second mounting platform and being able to rotate on the surface of the second mounting platform, and the second limiting groove fixing the second rotating block to the second mounting platform by bolts; The second limiting groove is provided with at least two; The second limiting groove is an arc-shaped groove. The second limiting groove can control both the angle of the back face and the position of the second rotating block. Multiple second limiting grooves ensure the stability of the second rotating block, while the arc-shaped groove limits the rotation angle of the second rotating block.

[0027] In some embodiments, the tool sine mounting assembly includes: a third mounting bracket, a third rotating shaft, a sine drive block, a third gauge block, and a second tool fixing part. The third mounting bracket has a fourth mounting hole at its center. The third rotating shaft is disposed within the fourth mounting hole. The second tool fixing part is located in the middle of the third rotating shaft. One end of the third rotating shaft is fixedly connected to one end of the sine drive block. The other end of the sine drive block has a third limiting groove. Several third gauge blocks are located at the bottom of the sine drive block near the third limiting groove. The third limiting groove is an arc-shaped groove and is fixed to the third mounting bracket by bolts. The third gauge blocks limit the rotation angle of the third rotating shaft. By driving the rotation of the third rotating shaft with the third gauge blocks, the rotation angle of the tool is precisely controlled, thereby adjusting the grinding angle of the two secondary flank face of the tool.

[0028] In some embodiments, the second tool fixing part includes: a second fixing groove, a second limiting wedge and a fixing part, the third rotating shaft is provided with a through second fixing groove, the tool is inserted into the second fixing groove and the front end extends out of the third rotating shaft, the second limiting wedge is installed in the second fixing groove and contacts the tool, and the fixing part extends from the outside of the pressure block into the second fixing groove to abut against the tool and limit the position of the tool. The cross-section of the second fixing groove is a right trapezoid formed by the third reference surface, the fourth reference surface, the second inclined surface, and the second top surface. The third reference surface is opposite to the second inclined surface, and the fourth reference surface is opposite to the second top surface. The third and fourth reference surfaces are set perpendicularly. The installation reference is determined during sharpening by the cooperation between the second fixing groove, the second limiting inclined block, and the fixing part. The third and fourth reference surfaces ensure that the reference is the same during tool processing and installation, ensuring that the reference of all tools is consistent.

[0029] In some embodiments, the fixing part includes: a third threaded hole and a third bolt. The third threaded hole is correspondingly disposed above the second limiting inclined block. The third bolt is connected to the third threaded hole. The third bolt passes through the third threaded hole and abuts against the second limiting inclined block from the second top surface and presses the second limiting inclined block against the fourth reference surface. The second limiting inclined block squeezes the cutting tool to move towards the third reference surface. At least two sets of the third threaded hole and the third bolt are provided. The tool is fixed by the second limiting wedge.

[0030] In some embodiments, the bidirectional grooving device includes: a third mounting base, a first tool holder, a first moving component, a first limiting component, and a second limiting component. The bottom of the third mounting base is mounted on the first moving part. The first limiting component is mounted on the base and limits the moving position of the third mounting base on the first moving part. The first moving component is vertically disposed on the third mounting base. The first tool holder is disposed at the bottom of the first moving component. The second limiting component is mounted on the first moving component and limits the rotation angle of the first tool holder. The third mounting base facilitates grooving by moving the device on the base. The first tool holder facilitates clamping and limiting the position of the tool. The first limiting component limits the length of the grooving to prevent through-cutting and damage. The second limiting component ensures the grooving angle.

[0031] In some embodiments, the first moving assembly includes: a first linear guide, a first slider, a first manual rotary wheel, a first lead screw, a nut seat, and a sliding plate. The first linear guide is mounted on a third mounting base, the first slider is sleeved on the first linear guide, the first lead screw is parallel to the first linear guide, the top of the first lead screw is connected to the first manual rotary wheel, the nut seat is sleeved on the first lead screw, and the sliding plate connects the nut seat and the first slider. The first manual rotary wheel drives the sliding plate to reciprocate up and down on the first linear guide. The first moving assembly facilitates the movement of the tool to be processed to a suitable position for grooving by aligning it with the rotating grinding wheel.

[0032] In some embodiments, the first tool holder is mounted in the middle of the sliding plate; The first tool holder includes a third rotating block and a first tool post. One side of the third rotating block is fixedly connected to a sliding plate, and the first tool post is installed on the other side of the third rotating block. The third rotating block drives the first tool post to rotate. The first tool holder has a first mounting groove along its axis, a first limiting block at the bottom of the first mounting groove, and a machining groove above the first limiting block. Rotation at different angles is achieved via a third rotating block. The tool is placed and fixed via the first mounting groove, and the position of the tool is determined by the first limiting block pressing against the tool tip. The machining groove facilitates the rotation of the grinding wheel, allowing for grooving at the rake face.

[0033] In some embodiments, the second limiting component is mounted on the sliding plate and limits the rotation of the third rotating block and the rotation angle of the first tool holder; The second limiting component includes: a second limiting block, a third limiting block, a fourth limiting block, and a fifth limiting block; The second and third limiting blocks are symmetrically arranged on both sides of the third rotating block, and the second and third limiting blocks move relative to each other to hold the third rotating block tightly. The fourth and fifth limiting blocks are symmetrically mounted on the sliding plate, abutting against the first tool holder and thus limiting its rotational position. The second limiting component ensures the grooving angle, guaranteeing that the two grooves are symmetrical and have the same angle. The second and third limiting blocks limit the grooving length, and the fourth and fifth limiting blocks limit the grooving angle.

[0034] In some embodiments, the first limiting component includes: a first limiting part and a second limiting part; The first limiting part and the second limiting part are symmetrically mounted on the base by bolts. The first limiting part limits the movement position of the third mounting seat, and the second limiting part limits the movement position of the third mounting seat in the other direction. The first limiting part includes: a bracket, a spiral push rod, a fifth mounting hole and a sixth mounting hole. The bracket is provided with the fifth mounting hole and the sixth mounting hole. The spiral push rod is threadedly connected to the fifth mounting hole. The spiral push rod abuts against one side of the third mounting seat to limit the movement position of the third mounting seat. The sixth mounting hole is fixed to the base by bolts. The structure of the first limiting part is the same as that of the second limiting part.

[0035] In some embodiments, the unidirectional grooving device includes: a fourth mounting base, a second manual rotating wheel, a second lead screw, and a second tool holder. The bottom of the fourth mounting base is connected to the first moving part and reciprocates on the first moving part. The second lead screw is horizontally arranged on the fourth mounting base. One end of the second lead screw is connected to the second manual rotating wheel, and the other end of the second lead screw is equipped with the second tool holder. The second manual rotating wheel drives the second tool holder to approach or move away from the grinding wheel device. The second tool holder is provided with a second mounting slot, and the tool is inserted into the second mounting slot and its position is fixed by bolts. The second tool holder's rotation position is limited by bolts. Grinding is achieved by moving the bottom of the fourth mounting base on the first moving part. The grooving depth is controlled by the second manual rotary wheel in cooperation with the second lead screw, and the grooving angle is controlled by the second tool holder.

[0036] In some embodiments, the lifting device includes a lifting plate, a pad, a screw, and a third manual rotating wheel. The lifting plate is connected to the base via a guide device, the screw is threadedly connected to the lifting plate, a second manual rotating wheel is fixedly connected to the top of the screw, and a pad is provided between the bottom of the screw and the upper surface of the base. Precise control of the cutting amount is achieved through the cooperation of the screw and the third manual rotating wheel.

[0037] In some embodiments, the first moving part includes: a second linear guide and a second slider, wherein multiple second sliders are provided, and the second sliders are connected to a bidirectional grooving device or a unidirectional grooving device; The second moving part includes a third linear guide and a third slider. Multiple third sliders are provided, and the third sliders are connected to a sine fixing device or a double sine fixing device.

[0038] In some embodiments, the grinding wheel device includes a grinding wheel and a drive motor, with the grinding wheel disposed in the middle of the base, and the output end of the drive motor connected to the grinding wheel and driving the grinding wheel to rotate.

[0039] According to one aspect of the present invention, a method for sharpening a 90° centering blade using a multi-functional sharpening machine is provided, comprising the following steps: S1. Install the sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, and tighten the locking bolt to fix the position of the first rotating block. Reverse the first tool fixing assembly 180° and fix it, then tighten the bolts; S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool.

[0040] According to one aspect of the present invention, a method for sharpening a 90° centering blade using a multi-functional sharpening machine is provided, characterized by comprising the following steps: S1. Install the double sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole and adjust the position of the third rotating shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S3. Rotate the second rotating block to the middle position of the second limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the blade thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool.

[0041] According to one aspect of the present invention, a method for sharpening a 90° double-groove centering knife using a multi-functional sharpening machine is provided, characterized by comprising the following steps: S1. Install the sine fixing device onto the second moving part, install the bidirectional grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, and tighten the locking bolt to fix the position of the first rotating block. Reverse the first tool fixing assembly 180° and fix it, then tighten the bolts; S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the height of the sliding plate, the position of the first and second limiting parts, and the rotation angle according to the preset specifications; S11. Insert the cutting tool into the first mounting slot, and after the tip of the cutting tool abuts against the first limiting block, tighten the cutting tool with a bolt. S12. Rotate the third rotating block until the outer side of the first tool holder abuts against the fourth limiting block; S13. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S14. Release the second limiting part, rotate the wheel to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and open the grinding wheel. S15. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the first limit part, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket to close the grinding wheel; S17. Rotate the third rotating block until the outer side of the first tool holder abuts against the fifth limiting block; S18. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part, turn to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and at the same time lock the second limiting part and open the grinding wheel; S20. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the second limit part, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base, close the grinding wheel, and remove the tool to complete the bidirectional grooving operation on the rake face.

[0042] According to one aspect of the present invention, a method for sharpening a 90° double-groove centering knife using a multi-functional sharpening machine is provided, characterized by comprising the following steps: S1. Install the double sine fixing device onto the second moving part, install the bidirectional grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole and adjust the position of the third rotating shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S3. Rotate the second rotating block to the middle position of the second limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the blade thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the height of the sliding plate, the position of the first and second limiting parts, and the rotation angle according to the preset specifications; S11. Insert the cutting tool into the first mounting slot, and after the tip of the cutting tool abuts against the first limiting block, tighten the cutting tool with a bolt. S12. Rotate the third rotating block until the outer side of the first tool holder abuts against the fourth limiting block; S13. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S14. Release the second limiting part, rotate the wheel to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and open the grinding wheel. S15. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the first limit part, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket to close the grinding wheel; S17. Rotate the third rotating block until the outer side of the first tool holder abuts against the fifth limiting block; S18. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part, turn to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and at the same time lock the second limiting part and open the grinding wheel; S20. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the second limit part, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base, close the grinding wheel, and remove the tool to complete the bidirectional grooving operation on the rake face.

[0043] According to one aspect of the present invention, a grinding method for sharpening a 90° single-groove knife using a multi-functional sharpening machine is provided, comprising the following steps: S1, installing a sine fixing device onto a second moving part, installing a unidirectional grooving device onto a first moving part, and simultaneously placing a pad with a preset cutting amount on the bottom of a third bolt; S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, and tighten the locking bolt to fix the position of the first rotating block. Reverse the first tool fixing assembly 180° and fix it, then tighten the bolts; S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the rotation angle of the second tool holder according to the preset data and lock the second tool holder; S11. Insert the cutting tool into the second mounting slot and tighten the cutting tool with bolts; S12. Rotate the second manual rotary wheel to drive the second tool post closer to the grinding wheel to achieve the preset cutting amount; S13, Open the grinding wheel S14. Push the fourth mounting seat along the second guide rail, and the tool contacts the grinding wheel to perform grooving; S15. Push back the fourth mounting base to close the grinding wheel; remove the tool to complete the unidirectional grooving operation on the front face.

[0044] According to one aspect of the present invention, a method for sharpening a 90° single-groove centering knife using a multi-functional sharpening machine is provided, characterized by comprising the following steps: S1. Install the double sine fixing device onto the second moving part, install the one-way grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole, adjust the position of the third rotating shaft, and tighten the locking bolt. It is necessary to ensure that the cutting edge of the tool is horizontal. S3. Rotate the second rotating block to the upper limit position of the second limiting groove, and tighten the bolt to fix the position of the second rotating block; S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, and tighten the locking bolt to fix the position of the first rotating block. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft and tighten the bolts. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the rotation angle of the second tool holder according to the preset data and lock the second tool holder; S11. Insert the cutting tool into the second mounting slot and tighten the cutting tool with bolts; S12. Rotate the second manual rotary wheel to drive the second tool post closer to the grinding wheel to achieve the preset cutting amount; S13, Open the grinding wheel S14. Push the fourth mounting seat along the second guide rail, and the tool contacts the grinding wheel to perform grooving; S15. Push back the fourth mounting base to close the grinding wheel; remove the tool to complete the unidirectional grooving operation on the front face.

[0045] According to one aspect of the present invention, a method for grinding a 40° worm gear turning tool using a multi-functional grinding machine is provided, characterized by comprising the following steps: S1. Install the double sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the second fixing slot and fix it, then insert the third rotating shaft into the fourth mounting hole; S3. Adjust the angle of the secondary back face on the right side of the tool. Place the third gauge block with a corresponding 5° at the bottom of the sine drive block and tighten the bolt to make the tool have a 5° right secondary back face deflection angle. S4. Rotate the second rotating block to the middle position of the limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S5. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 20°, and lock the second mounting bracket to the second rotating shaft. S6. Open the grinding wheel, push the second mounting base to move back and forth on the second linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the secondary flank face on one side of the tool; S7. Turn off the grinding wheel; S8. Adjust the angle of the secondary back face on the left side of the tool. Place the third gauge block corresponding to 10° at the bottom of the sine drive block and tighten the bolt to give the tool a 10° secondary cutting angle on the left side. S9. Open the grinding wheel, push the second mounting base to move back and forth on the second linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the secondary flank face on the other side of the tool; S10. Turn off the grinding wheel and remove the tool.

[0046] Compared with existing technologies, this invention has the advantages of precise grinding amount, precise adjustable grinding angle for different surfaces, high integration, improved efficiency, and reduced wear. A sine-fixing device can be used for grinding grooving tools, a double sine-fixing device can be used for grinding grooving tools, worm gear cutters, and thread cutters, a bidirectional grooving device can achieve bidirectional grooving of grooving tools, and a unidirectional grooving device can achieve unidirectional arc-shaped grooving of grooving tools. The sine-fixed device allows for precise adjustment of any cutting edge angle for grinding, while the first rotating component allows for precise adjustment of any flank angle. Grinding is achieved by moving the first mounting base on the second moving part. Using the first rotating shaft as a fulcrum, and with a first gauge block placed at the bottom of the first contact block, the angle of the first mounting platform is precisely controlled, allowing for precise adjustment of any tool angle for grinding. The first mounting bracket allows for unrestricted rotation of the first rotating shaft when the bolts are loosened; after angle adjustment, the bolts are tightened to fix the position of the first rotating shaft, ensuring stable machining. A spring provides a downward force to ensure constant contact between the first contact block and the first gauge block. The first limiting groove controls both the flank angle and limits the position of the first rotating block. Multiple first limiting grooves ensure the stability of the first rotating block, while the arc-shaped groove limits its rotation angle, allowing for quick angle adjustment. The installation datum is determined during sharpening by the cooperation of the first fixed groove, the first limiting wedge, and the first fixed part. This ensures that the center of each ground tool is consistent after installation on the grooving machine, thus offsetting the influence of tool body bending deformation. The first and second positioning surfaces ensure consistent datum after flipping and sharpening, improving processing efficiency. The V-shaped surface ensures accurate contact during rapid installation. The first and second datum surfaces ensure that the datum is the same during tool processing and installation on the grooving machine, ensuring that the cutting center of all tools is consistent. The first and second bolts achieve the function of tight fixing and positioning. The second rotating component allows for precise adjustment of any flank angle. Grinding is achieved by moving the second mounting base on the second moving part. The tool's two secondary flank angles are adjusted via the tool's sinusoidal mounting component. Using the second rotating shaft as a fulcrum, the angle of the second mounting platform is precisely controlled by adding a second gauge block at the bottom of the second contact block, enabling precise adjustment of any tool profile angle for grinding. The second mounting bracket allows for unrestricted rotation of the second rotating shaft when the bolts are loosened. After angle adjustment, tightening the bolts secures the second rotating shaft, ensuring stable machining. A spring provides a downward force to maintain the second contact block's position. The second gauge block contacts the second measuring block; the second limiting groove controls both the flank angle and the position of the second rotating block, and multiple second limiting grooves ensure the stability of the second rotating block while the arc-shaped groove limits its rotation angle; the third measuring block drives the rotation of the third shaft to precisely control the rotation angle of the tool, thereby adjusting the grinding angle of the two secondary flank faces of the tool; the second fixing groove, in conjunction with the second limiting wedge and the fixing part, determines the installation reference during sharpening; the third and fourth reference surfaces ensure that the reference is the same during tool machining and installation, ensuring that the reference of all tools is consistent; the second limiting wedge fixes the tool. The third mounting base facilitates grooving by moving the tool on the base; the first tool holder facilitates clamping and defining the tool's position; the first limiting component limits the grooving length to prevent through-cutting and wear; and the second limiting component ensures the grooving angle. The first moving component facilitates moving the tool to be processed to a suitable position, aligning it with the rotating grinding wheel for grooving. The third rotating block allows for rotation at different angles; the first mounting slot places and fixes the tool; the first limiting block holds the tool tip to determine its position; the machining slot facilitates grinding wheel rotation and grooving at the rake face; the second limiting component ensures the grooving angle, guaranteeing symmetry and consistent angles between the two grooves; the second and third limiting blocks limit the grooving length; and the fourth and fifth limiting blocks limit the grooving angle. Grinding is achieved by moving the bottom of the fourth mounting base on the first moving part, the grooving depth is controlled by the second manual rotary wheel in cooperation with the second lead screw, and the grooving angle is controlled by the second tool post. Precise control of the cutting amount is achieved through the cooperation of the screw and the third manual rotary wheel. Attached Figure Description

[0047] Figure 1 This is a schematic diagram of the existing grooving machine tool installation structure; Figure 2 This is a schematic diagram of the grinding status of existing grooving machine cutters; Figure 3 This is a schematic diagram of the installation state of the existing grooving machine cutters, showing the center of the cutter. Figure 4 This is a schematic diagram of the existing grooving machine's bidirectional grooving tool structure and an enlarged view of the tool tip; Figure 5 This is a schematic diagram of the existing grooving machine's unidirectional grooving structure; Figure 6 This is a schematic diagram of the structure of an existing worm gear cutting tool; Figure 7 This is a schematic diagram of the machining state of an existing worm gear cutting tool; Figure 8 This is a schematic diagram of the structure of the multi-functional knife sharpening machine of the present invention; Figure 9 This is a schematic diagram of the sine wave fixing device of the multifunctional knife sharpening machine of the present invention; Figure 10 This is a schematic diagram of the structure of the first sinusoidal adjustment component of the multifunctional knife sharpening machine of the present invention; Figure 11 This is a schematic diagram of the structure of the first tool fixing assembly of the multifunctional knife sharpening machine of the present invention; Figure 12 This is a partial structural cross-sectional view of the first tool fixing assembly of the multifunctional knife sharpening machine of the present invention; Figure 13 This is an end view of the first tool fixing assembly of the multifunctional sharpening machine of the present invention; Figure 14 This is a schematic diagram showing the usage state of the first tool fixing assembly of the multifunctional knife sharpening machine of the present invention. Figure 15 This is a schematic diagram of the double sine fixing device of the multifunctional knife sharpening machine of the present invention; Figure 16 This is a schematic diagram of the structure of the second sine adjustment component of the multifunctional knife sharpening machine of the present invention; Figure 17 This is a schematic diagram of the sine-mounted tool assembly of the multi-functional sharpening machine of the present invention; Figure 18 This is a schematic diagram of the structure of the second tool fixing part of the multifunctional knife sharpening machine of the present invention; Figure 18 This is a schematic diagram of the structure of the second tool fixing part of the multifunctional knife sharpening machine of the present invention; Figure 19 This is a schematic diagram of the bidirectional grooving device of the multifunctional knife sharpening machine of the present invention; Figure 20 This is a schematic diagram of the structure of the first tool holder of the multifunctional sharpening machine of the present invention; Figure 21 This is a schematic diagram of the structure of the second limiting part of the multifunctional knife sharpening machine of the present invention; Figure 22 This is a schematic diagram of the structure of the first limiting part of the multifunctional knife sharpening machine of the present invention; Figure 23 This is a schematic diagram of the unidirectional grooving device of the multifunctional knife sharpening machine of the present invention; Figure 24 This is a schematic diagram of the lifting device of the multifunctional knife sharpening machine of the present invention. Detailed Implementation

[0048] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, it should be noted that these embodiments are not intended to limit the present invention. Equivalent transformations or substitutions in function, method, or structure made by those skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0049] In the description of this invention, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the terms according to the specific circumstances.

[0050] like Figure 8As shown, the multi-functional knife sharpening machine of the present invention includes: a base 1, a lifting device 2, a sine fixing device 3, a double sine fixing device 4, a bidirectional grooving device 5, a unidirectional grooving device 6, and a grinding wheel device 7. A grinding wheel device 7 is set in the middle of the base 1, a lifting device 2 is installed on one side of the base 1, and a first moving part 8 is set on the other side of the base 1 opposite to the lifting device 2. A bidirectional grooving device 5 and a unidirectional grooving device 6 are installed on the first moving part 8. Alternatively, a bidirectional slotting device 5 or a unidirectional slotting device 6 may be installed on the first moving part 8. A second moving part 9 is arranged on the lifting device 2 parallel to the first moving part 8; The second moving part 9 is equipped with a sine fixing device 3 and a double sine fixing device 4; Alternatively, a sine fixing device 3 or a double sine fixing device 4 may be installed on the second moving part 9. The sine fixing device 3 can be used for grinding and sharpening grooving tools, the double sine fixing device 4 can be used for grinding and sharpening grooving tools, worm gear cutters and thread cutters, the bidirectional grooving device 5 can realize bidirectional grooving of grooving tools, and the unidirectional grooving device 6 can realize unidirectional arc grooving of grooving tools.

[0051] During use, the sinusoidal fixing device 3 can process grooving tools with arbitrary blade angles. Furthermore, when used in combination with the bidirectional grooving device 5, after tool processing, bidirectional grooving on the rake face can produce shapes such as... Figure 4 The cutting tool shown; the sinusoidal fixing device 3 and the one-way grooving device 6 are used together. After the cutting tool is completed, the one-way grooving of the rake face can produce the shape shown. Figure 5 The cutting tool shown.

[0052] The double sine fixing device 4 can process grooving cutters with arbitrary tool angles, worm gear cutters with arbitrary secondary flank face angles, and threading cutters. Simultaneously, the double sine fixing device 4, when used in combination with the bidirectional grooving device 5, can produce, after tool machining, bidirectional grooving on the rake face to create, as shown in the image. Figure 4 The tool shown; the double sine fixing device 4 and the unidirectional grooving device 6 are used together. After the tool machining is completed, the unidirectional grooving of the rake face can produce the shape shown. Figure 5 The cutting tool shown.

[0053] like Figure 9 As shown, the sine fixing device 3 includes: a first mounting base 31, a first tool fixing assembly 32, a first rotating assembly 33 and a first sine adjustment assembly 34. The bottom of the first mounting base 31 is connected to the second moving part 9. The first sine adjustment assembly 34 is provided on the top of the first mounting base 31. The first rotating assembly 33 is installed on the top of the first sine adjustment assembly 34. The first tool fixing assembly 32 is detachably fixed in the first rotating assembly 33. The first rotating component 33 adjusts the grinding angle of the tool's flank face, and the first sine adjustment component 34 adjusts the grinding angle of the tool's profile angle. The sine fixing device 3 allows for precise adjustment of any profile angle for grinding, and the first rotating component 33 allows for precise adjustment of any flank face angle. Grinding of the tool is achieved by pushing the first mounting base 31 to move on the second moving part 9.

[0054] like Figure 10 As shown, the first sine adjustment assembly 34 includes: a first mounting bracket 341, a first rotating shaft 342, a first connecting block 343, a first contact block 344, a first mounting platform 345, and a first gauge block 346. The bottom of the first mounting bracket 341 is fixedly connected to the first mounting seat 31. Both ends of the first rotating shaft 342 are placed inside the first mounting bracket 341. One end of the first connecting block 343 is fixedly connected to the first rotating shaft 342, and the other end is fixedly connected to the first contact block 344. The first mounting platform 345 is located in the middle of the first rotating shaft 342. A first rotating assembly 33 is mounted on the first mounting platform 345. Several first gauge blocks 346 are provided, and one or more first gauge blocks 346 are placed at the bottom of the first contact block 344 to adjust the angle of the first mounting platform 345. By using the first rotating shaft 342 as a fulcrum and adding the first gauge blocks 346 at the bottom of the first contact block 344, the angle of the first mounting platform 345 can be precisely controlled, thereby enabling precise adjustment of any blade angle for grinding.

[0055] In essence, the first rotating shaft 342, the first connecting block 343, and the first contact block 344 utilize the working principle of a sine gauge. That is, it uses the sine relationship of trigonometric functions to achieve angle measurement or positioning, thereby converting the linear dimensional change (height of the first gauge block 34646) into an angular change using the formula: sinα = H / L, where α is the angle to be measured or set, H is the height difference of the first gauge block 346 group (the height difference at one end), and L is the center distance between the two cylinders of the sine gauge (e.g., 100mm).

[0056] The first mounting bracket 341 has two parts that respectively fix the two ends of the first rotating shaft 342. The first mounting bracket 341 has a first mounting hole 347 at its center. The end of the first rotating shaft 342 is placed in the first mounting hole 347. The first mounting bracket 341 is divided into upper and lower parts, which are connected by bolts to hold and fix the first rotating shaft 342. The first mounting bracket 341 allows the first rotating shaft 342 to be rotated and adjusted without limiting its angle when the bolts are loosened. After the angle adjustment is completed, the bolts are tightened to fix the position of the first rotating shaft 342 to ensure stable processing.

[0057] A spring is provided between the first connecting block 343 and the first mounting base 31. A screw passes through the first connecting block 343 and the first mounting base 31. A first spring 348 is located between the first screw 349 and the top of the first connecting block 343. The first spring 348 presses the first contact block 344 towards the first mounting base 31. The first spring 348 provides a downward force to ensure that the first contact block 344 and the first gauge block 346 are always in contact.

[0058] The first rotating component 33 includes: a first rotating block 331 and a first limiting groove 332. The bottom of the first rotating block 331 is connected to the first mounting platform 345 and can rotate on the surface of the first mounting platform 345. The first limiting groove 332 fixes the first rotating block 331 to the first mounting platform 345 by bolts. The first limiting groove 332 is provided with at least two; The first limiting groove 332 is an arc-shaped groove; The first rotating block 331 has a second mounting hole 333 in the middle. The first tool fixing assembly 32 is inserted into the second mounting hole 333. The cross-section of the second mounting hole 333 is the same as the cross-section of the first tool fixing assembly 32. A bolt extends from the outside of the first rotating block 331 into the second mounting hole 333 and abuts against the first tool fixing assembly 32. The first limiting groove 332 can control both the rake angle and limit the position of the first rotating block 331. The stability of the first rotating block 331 is ensured by multiple first limiting grooves 332, while the rotation angle of the first rotating block 331 is limited by the arc-shaped groove, allowing for quick angle adjustment.

[0059] like Figure 11 As shown, the first tool fixing assembly 32 includes: a tool pressing block 321, a first fixing groove 322, a first limiting wedge block 323, and a first fixing part 425 33 24. The tool pressing block 321 has a through first fixing groove 322 at its center. The tool is inserted into the first fixing groove 322 and its front end extends out of the tool pressing block 321. The first limiting wedge block 323 is installed in the first fixing groove 322 and contacts the tool. The first fixing part 425 33 24 extends from the outside of the tool pressing block 321 into the first fixing groove 322 and abuts against the tool to limit the position of the tool. The pressure block 321 includes: a first positioning surface 3211 and a second positioning surface 3212, wherein the first positioning surface 3211 and the second positioning surface 3212 are symmetrically arranged; The first positioning surface 3211 or the second positioning surface serves as the reference surface for the first tool fixing assembly 32; like Figure 12 and Figure 13As shown, the first positioning surface 3211 and the second positioning surface 3212 are V-shaped surfaces. The installation reference is determined during sharpening through the cooperation of the first fixing groove 322 with the first limiting wedge 323 and the first fixing part 4253324, thereby ensuring that the center of each ground tool is consistent after installation on the grooving machine, offsetting the influence of tool body bending deformation. The consistency of the reference after flipping and sharpening using the first positioning surface 3211 and the second positioning surface 3212 improves processing efficiency, and the V-shaped surface ensures accurate contact during rapid installation.

[0060] The cross section of the first fixing groove 322 is a right trapezoid formed by the first reference surface 3221, the second reference surface 3222, the first inclined surface 3223, and the first top surface 3224. The first reference surface 3221 is opposite to the first inclined surface 3223, the second reference surface 3222 is opposite to the first top surface 3224, and the first reference surface 3221 and the second reference surface 3222 are set perpendicularly. The first reference surface 3221 and the second reference surface 3222 serve as reference surfaces for tool grinding; the first limiting wedge 323 contacts the first wedge 3223 to press the tool against the first reference surface 3221. The first reference surface 3221 and the second reference surface 3222 ensure that the reference is the same when the tool is being processed and installed on the grooving machine, and ensure that the cutting center of all tools is consistent.

[0061] like Figure 14 As shown, the first fixing part 4253324 includes: a first threaded hole 3241, a first bolt 3242, a second threaded hole 3243, and a second bolt 3244. The first threaded hole 3241 is correspondingly disposed above the second reference surface 3222. The first bolt 3242 is connected to the first threaded hole 3241. The first bolt 3242 passes through the first threaded hole 3241 and abuts against the tool from the first top surface 3224, pressing the tool against the second reference surface 3222. The second threaded hole 3243 is correspondingly disposed above the first limiting inclined block 323. The second bolt 3244 is connected to the second threaded hole 3243. The second bolt 3244 passes through the second threaded hole 3243 and abuts against the first limiting inclined block 323 from the first top surface 3224, pressing the first limiting inclined block 323 against the second reference surface 3222. The first limiting inclined block 323 squeezes the cutting tool to move towards the first reference surface 3221. At least two sets of the first threaded hole 3241 and the first bolt 3242 are provided, and at least two sets of the second threaded hole 3243 and the second bolt 3244 are provided. The first bolt 3242 and the second bolt 3244 are used to achieve the function of fastening and fixing.

[0062] In practical use, first, place the tool into the first fixing slot 322. It is important to ensure that the tool's reference surface aligns with both the first reference surface 3221 and the second reference surface 3222. Then, rotate the second bolt 324444. The second bolt 32444 presses against the first limiting wedge 323, moving it downwards along the first inclined surface 3223 while simultaneously pressing the tool against the first reference surface 3221. Next, rotate the first bolt 3242. The first bolt 3242 pushes the tool downwards, pressing it against the second reference surface 3222. This ensures that the reference surface during tool machining is consistent with the reference surface during clamping. Although the cutting edge of the tool may be asymmetrical due to the curvature of the tool body, the machining center will remain on the same straight line. When clamping the tool, only the clamping position needs to be considered. This eliminates tedious installation and adjustment steps, greatly improving accuracy and installation efficiency.

[0063] like Figure 15 As shown, the double sine fixing device 4 includes: a second mounting base 41, a tool sine mounting assembly 42, a second rotating assembly 43, and a second sine adjustment assembly 44. The bottom of the second mounting base 41 is connected to the second moving part 9, the top of the second mounting base 41 is provided with the second sine adjustment assembly 44, the top of the second sine adjustment assembly 44 is mounted with the second rotating assembly 43, and the tool sine mounting assembly 42 is detachably fixed on the second rotating assembly 43. The second rotating component 43 adjusts the grinding angle of the tool's flank face, the second sine adjustment component 44 adjusts the grinding angle of the tool profile angle, and the tool sine mounting component 42 controls the grinding angle of the tool's secondary flank face deflection angle. The second sine adjustment component 44 allows for precise adjustment of any tool profile angle for grinding, the second rotating component 43 allows for precise adjustment of any flank angle, the second mounting base 41 is moved on the second moving part 9 to perform grinding operations on the tool, and the tool sine mounting component 42 adjusts the deflection angles of the two secondary flank faces of the tool.

[0064] like Figure 16As shown, the second sine adjustment assembly 44 includes: a second mounting bracket 441, a second rotating shaft 442, a second connecting block 443, a second contact block 444, a second mounting platform 445, and a second gauge block 446. The bottom of the second mounting bracket 441 is fixedly connected to the second mounting seat 41. Both ends of the second rotating shaft 442 are placed inside the second mounting bracket 441. One end of the second connecting block 443 is fixedly connected to the second rotating shaft 442, and the other end of the second connecting block 443 is fixedly connected to the second contact block 444. The second mounting platform 445 is set in the middle of the second rotating shaft 442. The second rotating assembly 43 is set on the second mounting platform 445. Several second gauge blocks 446 are provided. The second gauge blocks 446, individually or in combination, are placed at the bottom of the second contact block 444 to adjust the angle of the second mounting platform 445. By using the second rotating shaft 442 as a fulcrum and adding the second gauge blocks 446 at the bottom of the second contact block 444, the angle of the second mounting platform 445 can be precisely controlled, thereby enabling precise adjustment of any blade angle for grinding.

[0065] In essence, the second rotating shaft 442, the second connecting block 443, and the second contact block 444 utilize the working principle of a sine gauge. That is, it uses the sine relationship of trigonometric functions to achieve angle measurement or positioning, thereby converting the linear dimensional change (height of the third gauge block 42446) into an angular change using the formula: sinα = H / L, where α is the angle to be measured or set, H is the height difference of the third gauge block 42446 group (the height difference at one end), and L is the center distance between the two cylinders of the sine gauge (e.g., 100mm).

[0066] The second mounting bracket 441 has two parts that fix the two ends of the second rotating shaft 442 respectively. The second mounting bracket 441 has a third mounting hole 447 in the center. The end of the second rotating shaft 442 is placed in the third mounting hole 447. The second mounting bracket 441 is divided into upper and lower parts and is connected by bolts to hold and fix the second rotating shaft 442. A second spring 448 is provided between the second connecting block 443 and the second mounting base 41. A second screw 449 passes through the second connecting block 443 and the second mounting base 41. The second spring 448 is located between the second screw 449 and the top of the second connecting block 443, and presses the second contact block 444 towards the second mounting base 41. The second mounting bracket 441 allows for unrestricted rotation and angle adjustment of the second rotating shaft 442 when the bolts are loosened. After angle adjustment, tightening the bolts secures the position of the second rotating shaft 442, ensuring stable machining. The second spring 448 provides a downward force to ensure constant contact between the second contact block 444 and the second gauge block 446.

[0067] The second rotating component 43 includes: a second rotating block 431 and a second limiting groove 432. The bottom of the second rotating block 431 is connected to the second mounting platform 445 and can rotate on the surface of the second mounting platform 445. The second limiting groove 432 fixes the second rotating block 432 to the second mounting platform 445 by bolts. The second limiting groove 432 is provided with at least two; The second limiting groove 432 is an arc-shaped groove. The second limiting groove 432 can control the angle of the back face and limit the position of the second rotating block 431. The stability of the second rotating block 431 is ensured by multiple second limiting grooves 432, while the rotation angle of the second rotating block 431 is limited by the arc-shaped groove.

[0068] like Figure 17 As shown, the tool sine mounting assembly 42 includes: a third mounting bracket 421, a third rotating shaft 422, a sine drive block 423, third gauge blocks 424, and a second tool fixing part 425. The third mounting bracket 421 has a fourth mounting hole at its center, and the third rotating shaft 422 is disposed within the fourth mounting hole. The second tool fixing part 425 is located in the middle of the third rotating shaft 422. One end of the third rotating shaft 422 is fixedly connected to one end of the sine drive block 423, and the other end of the sine drive block 423 has a third limiting groove 426. Several third gauge blocks 424 are arranged at the bottom of the sine drive block 423 near the end of the third limiting groove 426. The third limiting groove 426 is an arc-shaped groove and is fixed to the third mounting bracket 421 by bolts. The third gauge blocks 424 limit the rotation angle of the third rotating shaft 422. By driving the rotation of the third rotating shaft 422 through the third gauge blocks 424, the rotation angle of the tool is precisely controlled, thereby adjusting the grinding angle of the two secondary flank faces of the tool.

[0069] like Figure 18 As shown, the second tool fixing part 425 includes: a second fixing groove 4251, a second limiting wedge 4252 and a fixing part 4253. The third rotating shaft 422 is provided with a through second fixing groove 4251 at its center. The tool is inserted into the second fixing groove 4251 and its front end extends out of the third rotating shaft 422. The second limiting wedge 4252 is installed in the second fixing groove 4251 and contacts the tool. The fixing part 4253 extends from the outside of the pressure block 321 into the second fixing groove 4251 to abut against the tool and limit the position of the tool. The cross-section of the second fixing groove 4251 is a right trapezoid formed by the third reference surface, the fourth reference surface, the second inclined surface 3223, and the second top surface 3224. The third reference surface is opposite to the second inclined surface 3223, and the fourth reference surface is opposite to the second top surface 3224. The third and fourth reference surfaces are set perpendicularly. The installation reference is determined during sharpening by the cooperation between the second fixing groove 4251, the second limiting inclined block 4252, and the fixing part 4253. The third and fourth reference surfaces ensure that the reference is the same during tool processing and installation, ensuring that the reference of all tools is consistent.

[0070] The fixing part 4253 includes a third threaded hole and a third bolt. The third threaded hole is correspondingly disposed above the second limiting inclined block 4252. The third bolt is connected to the third threaded hole. The third bolt passes through the third threaded hole and abuts against the second limiting inclined block 4252 from the second top surface 3224 and presses the second limiting inclined block 4252 toward the fourth reference surface. The second limiting inclined block 4252 squeezes the cutting tool to move toward the third reference surface. At least two sets of third threaded holes and third bolts are provided. The tool is fixed by the second limiting wedge 4252.

[0071] like Figure 19 As shown, the bidirectional grooving device 5 includes: a third mounting base 51, a first tool holder 52, a first moving component 53, a first limiting component 54, and a second limiting component 55. The bottom of the third mounting base 51 is mounted on the first moving part 8. The first limiting component 54 is mounted on the base 1 and limits the moving position of the third mounting base 51 on the first moving part 8. The first moving component 53 is vertically mounted on the third mounting base 51, and the first tool holder 52 is disposed at the bottom of the first moving component 53. The second limiting component 55 is mounted on both sides of the motor panel and limits the rotation angle of the first tool holder 52. The third mounting base 51 facilitates grooving by moving on the base 1. The first tool holder 52 facilitates clamping and limits the position of the tool. The first limiting component 54 limits the length of the grooving to prevent through-cutting and damage. The second limiting component 55 ensures the angle of the grooving.

[0072] The first moving assembly 53 includes: a first linear guide 531, a first slider 532, a first manual rotary wheel 533, a first lead screw 534, a nut seat 535, and a sliding plate 536. The first linear guide 531 is mounted on the third mounting base 51, the first slider 532 is sleeved on the first linear guide 531, the first lead screw 534 is parallel to the first linear guide 531, the top of the first lead screw 534 is connected to the first manual rotary wheel 533, the nut seat 535 is sleeved on the first lead screw 534, and the sliding plate 536 connects the nut seat 535 and the first slider 532. The first manual rotary wheel 533 drives the sliding plate 536 to move up and down reciprocally on the first linear guide 531. The first moving assembly 53 facilitates the movement of the tool to be processed to a suitable position for grooving by aligning it with the rotating grinding wheel.

[0073] like Figure 20 As shown, the first tool holder 52 is installed in the middle of the sliding plate 536; The first tool holder 52 includes: a third rotating block 521 and a first tool holder 522. One side of the third rotating block 521 is fixedly connected to the sliding plate 536, and the first tool holder 522 is installed on the other side of the third rotating block 521. The third rotating block 521 drives the first tool holder 522 to rotate. The first tool holder 522 is axially provided with a first mounting groove 523, the bottom of the first mounting groove 523 is provided with a first limiting block 524, and the upper part of the first limiting block 524 is provided with a machining groove 525. Rotation at different angles is achieved by a third rotating block 521. The tool is placed and fixed by the first mounting groove 523, and the position of the tool is determined by the first limiting block 524 pressing against the tool tip. The machining groove 525 facilitates the rotation of the grinding wheel, thereby creating a groove on the rake face.

[0074] like Figure 21 As shown, the second limiting component 55 is mounted on the sliding plate 536 and limits the rotation of the third rotating block 521 and the rotation angle of the first tool holder 522. The second limiting component 55 includes: a second limiting block 551, a third limiting block 552, a fourth limiting block 553 and a fifth limiting block 554; The second limiting block 551 and the third limiting block 552 are symmetrically arranged on both sides of the third rotating block 521. The second limiting block 551 and the third limiting block 552 move relative to each other to hug the third rotating block 521. The fourth limiting block 553 and the fifth limiting block 554 are symmetrically mounted on the sliding plate 536, abutting against the first tool holder 522 and thus limiting the rotation position of the first tool holder 522. The fourth limiting block 553 and the fifth limiting block 554 are used to ensure the angle of the slot, ensuring that the two slots are symmetrical and have the same angle. The length of the slot is limited by the second limiting block 5451 and the third limiting block 542.

[0075] like Figure 22As shown, the first limiting component 54 includes: a first limiting part 541 and a second limiting part 542; The first limiting part 541 and the second limiting part 542 are symmetrically mounted on the base 1 by bolts. The first limiting part 541 limits the movement position of the third mounting base 51, and the second limiting part 542 limits the movement position of the third mounting base 51 in the other direction. The first limiting part 541 includes: a bracket 5411, a spiral push rod 5412, a fifth mounting hole 5413, and a sixth mounting hole 5414. The bracket is provided with the fifth mounting hole 5413 and the sixth mounting hole 5414. The spiral stop 5412 is threadedly connected to the fifth mounting hole 5413. The spiral push rod 5412 abuts against one side of the third mounting seat 51. The third mounting seat 51 moves at a constant speed by the pushing force of the hand and the constant speed rotation of the spiral push rod 5412 until 54 and 55 touch. The sixth mounting hole 5414 is fixed to the motor panel by bolts. The structure of the first limiting part 541 is the same as that of the second limiting part 542.

[0076] like Figure 23 As shown, the unidirectional grooving device 6 includes: a fourth mounting base 61, a second manual rotating wheel 62, a second lead screw 63, and a second tool holder 64. The bottom of the fourth mounting base 61 is connected to the first moving part 8 and moves back and forth on the first moving part 8. The second lead screw 63 is horizontally arranged on the fourth mounting base 61. One end of the second lead screw 63 is connected to the second manual rotating wheel 62, and the other end of the second lead screw 63 is equipped with the second tool holder 64. The second manual rotating wheel 62 drives the second tool holder 64 to move closer to or away from the grinding wheel device 7. The second tool holder 64 is provided with a second mounting slot 65, and the tool is inserted into the second mounting slot 65 and the tool position is fixed by bolts. The second tool holder 64 has its rotation position limited by bolts. Grinding is achieved by moving the bottom of the fourth mounting base 61 on the first moving part 8. The grooving depth is controlled by the second manual rotary wheel 62 cooperating with the second lead screw 63. The grooving angle is controlled by the second tool holder 64.

[0077] like Figure 24 As shown, the lifting device 2 includes: a lifting plate 21, a pad 22, a third screw 23, and a third manual rotary wheel 24. The lifting plate 21 is connected to the base 1 via a guide device 25. The third screw 23 is threadedly connected to the lifting plate 21. The top of the third screw 23 is fixedly connected to the second manual rotary wheel 62, and the pad 22 is placed between the bottom of the screw and the upper surface of the base 1. The precise control of the cutting amount is achieved through the cooperation of the third screw 23 and the third manual rotary wheel 24.

[0078] The first moving part 8 includes: a second linear guide 81 and a second slider 82. Multiple second sliders 82 are provided. The second sliders 82 are connected to a bidirectional grooving device 5 or a unidirectional grooving device 6. The second moving part 9 includes a third linear guide 91 and a third slider 92. Multiple third sliders 92 are provided, and the third sliders 92 are connected to a sine fixing device 3 or a double sine fixing device 4.

[0079] The grinding wheel device 7 includes a grinding wheel 71 and a drive motor 72. The grinding wheel 71 is located in the middle of the base 1, and the output end of the drive motor 72 is connected to the grinding wheel 71 and drives the grinding wheel 71 to rotate.

[0080] Example 1: A method for sharpening a 90° centering blade using a multi-functional sharpening machine, comprising the following steps: S1. Install the sine fixing device 3 onto the second moving part 9, and at the same time place a pre-cutting amount pad 22 on the bottom of the third screw 23; S2. Tool installation: Insert the tool into the first tool fixing assembly 32 and fix it, then lock the first tool fixing assembly 32 onto the first rotating assembly 33. S3. Rotate the first rotating block 331 to the upper limit position of the first limiting groove 332, and tighten the bolt to fix the position of the first rotating block 331; S4. Adjust the angle of the first mounting platform 345, loosen the bolts, place the first gauge block 346 at the bottom of the first contact block 343 to ensure the angle is 45°, and lock the first rotating shaft 342 with the first mounting bracket 341. S5. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the pad controlling the cutting amount touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the first rotating block 331 to the lower limit position of the first limiting groove 332, tighten the bolt to fix the position of the first rotating block 331, reverse the first tool fixing assembly 32 by 180° and fix it, and tighten the bolt. S8. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S9. Close the grinding wheel 71 and remove the tool.

[0081] Example 2: A method for sharpening a 90° centering blade using a multi-functional sharpening machine is provided, characterized by the following steps: S1. Install the double sine fixing device 3 onto the second moving part 9, and at the same time place a pre-cutting amount pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the second fixing slot 4251 and fix it. Then, insert the third rotating shaft 422 into the fourth mounting hole and adjust the position of the third rotating shaft 422 so that the outer arc part of the sine drive block 423 contacts the calculated pad block. Ensure that the two sides of the tool in the thickness direction are parallel to the bottom of the second rotating block 431 and tighten the bolts. S3. Rotate the second rotating block 431 to the middle position of the second limiting groove 432, and tighten the bolt to fix the position of the second rotating block 431. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel 71. S4. Adjust the angle of the second mounting platform 445, loosen the bolts, place the second gauge block 446 at the bottom of the second contact block 444 to ensure the angle is 45°, and lock the second rotating shaft 442 with the second mounting bracket 441. S5. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the third rotating shaft 422 180° and insert it into the fourth mounting hole. Adjust the position of the third rotating shaft 422 so that the outer arc part of the sine drive block 423 contacts the calculated pad block, ensuring that the two sides of the blade thickness are parallel to the bottom of the second rotating block 431 and tighten the bolts. S8. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S9. Close the grinding wheel 71 and remove the tool.

[0082] Example 3: A method for sharpening a 90° double-groove centering knife using a multi-functional sharpening machine, characterized by the following steps: S1. Install the sine fixing device 3 onto the second moving part 9, install the bidirectional grooving device 5 onto the first moving part 8, and at the same time, place a pre-cutting pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the first tool fixing assembly 32 and fix it, then lock the first tool fixing assembly 32 onto the first rotating assembly 33. S3. Rotate the first rotating block 331 to the upper limit position of the first limiting groove 332, and tighten the bolt to fix the position of the first rotating block 331; S4. Adjust the angle of the first mounting platform 345, loosen the bolts, place the first gauge block 346 at the bottom of the first contact block 343 to ensure the angle is 45°, and lock the first rotating shaft 342 with the first mounting bracket 341. S5. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the pad controlling the cutting amount touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the first rotating block 331 to the lower limit position of the first limiting groove 332, tighten the bolt to fix the position of the first rotating block 331, reverse the first tool fixing assembly 32 by 180° and fix it, and tighten the bolt. S8. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S9. Close the grinding wheel 71 and remove the tool; S10. Adjust the height of the sliding plate 536, the position of the first limiting part 541 and the second limiting part 542 and the angle of rotation according to the preset specifications. S11. Insert the cutting tool into the first mounting slot 523, and after the tip of the cutting tool abuts against the first limiting block 524, tighten the cutting tool with a bolt. S12. Rotate the third rotating block 521 until the outer side of the first tool holder 522 abuts against the fourth limiting block 553; S13. Push the second limiting block 551 and the third limiting block 552 to hold the third rotating block 521 and tighten the nut to limit the position of the tool; S14. Release the second limiting part 542, rotate the wheel to one side with the sixth mounting hole 5414 as the center without interfering with the movement of the third mounting base 51, and open the grinding wheel 71. S15. Push the third mounting base 51 along the second rail 81. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel 71 to make grooves until it hits the first limit part 541, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket 51 and close the grinding wheel 71; S17. Rotate the third rotating block 521 until the outer side of the first tool holder 522 abuts against the fifth limiting block 554. S18. Push the second limiting block 551 and the third limiting block 552 to hold the third rotating block 521 and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part 541, turn to one side with the sixth mounting hole 5414 as the center without interfering with the movement of the third mounting seat 51, and at the same time lock the second limiting part 542 and open the grinding wheel 71. S20. Push the third mounting base 51 along the second rail 81. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel 71 to make grooves until it hits the second limit part 542, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base 51, close the grinding wheel 71, and remove the tool to complete the bidirectional grooving operation on the front face.

[0083] Example 4: A method for sharpening a 90° double-groove centering knife using a multi-functional sharpening machine, characterized by the following steps: S1. Install the double sine fixing device 3 onto the second moving part 9, install the bidirectional grooving device 5 onto the first moving part 8, and at the same time, place a pre-cutting pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the second fixing slot 4251 and fix it. Then, insert the third rotating shaft 422 into the fourth mounting hole and adjust the position of the third rotating shaft 422 so that the outer arc part of the sine drive block 423 contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block 431 and tighten the bolts. S3. Rotate the second rotating block 431 to the middle position of the second limiting groove 432, and tighten the bolt to fix the position of the second rotating block 431. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel 71. S4. Adjust the angle of the second mounting platform 445, loosen the bolts, place the second gauge block 446 at the bottom of the second contact block 444 to ensure the angle is 45°, and lock the second rotating shaft 442 with the second mounting bracket 441. S5. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the third rotating shaft 422 180° and insert it into the fourth mounting hole. Adjust the position of the third rotating shaft 422 so that the outer arc part of the sine drive block 423 contacts the calculated pad block, ensuring that both sides in the blade thickness direction are parallel to the bottom of the second rotating block 431 and tighten the bolts. S8. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S9. Close the grinding wheel 71 and remove the tool; S10. Adjust the height of the sliding plate 536, the position of the first limiting part 541 and the second limiting part 542 and the angle of rotation according to the preset specifications. S11. Insert the cutting tool into the first mounting slot 523, and after the tip of the cutting tool abuts against the first limiting block 524, tighten the cutting tool with a bolt. S12. Rotate the third rotating block 521 until the outer side of the first tool holder 522 abuts against the fourth limiting block 553; S13. Push the second limiting block 551 and the third limiting block 552 to hold the third rotating block 521 and tighten the nut to limit the position of the tool; S14. Release the second limiting part 542, rotate the wheel to one side with the sixth mounting hole 5414 as the center without interfering with the movement of the third mounting base 51, and open the grinding wheel 71. S15. Push the third mounting base 51 along the second rail 81. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel 71 to make grooves until it hits the first limit part 541, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket 51 and close the grinding wheel 71; S17. Rotate the third rotating block 521 until the outer side of the first tool holder 522 abuts against the fifth limiting block 554. S18. Push the second limiting block 551 and the third limiting block 552 to hold the third rotating block 521 and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part 541, turn to one side with the sixth mounting hole 5414 as the center without interfering with the movement of the third mounting seat 51, and at the same time lock the second limiting part 542 and open the grinding wheel 71. S20. Push the third mounting base 51 along the second rail 81. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel 71 to make grooves until it hits the second limit part 542, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base 51, close the grinding wheel 71, and remove the tool to complete the bidirectional grooving operation on the front face.

[0084] Example 5: A grinding method for a 90° single-groove centering knife using a multi-functional grinding machine, characterized by the following steps: S1. Install the sine fixing device 3 onto the second moving part 9, install the one-way grooving device 6 onto the first moving part 8, and at the same time, place a pre-cutting amount pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the first tool fixing assembly 32 and fix it, then lock the first tool fixing assembly 32 onto the first rotating assembly 33. S3. Rotate the first rotating block 331 to the upper limit position of the first limiting groove 332, and tighten the bolt to fix the position of the first rotating block 331; S4. Adjust the angle of the first mounting platform 345, loosen the bolts, place the first gauge block 346 at the bottom of the first contact block 343 to ensure the angle is 45°, and lock the first rotating shaft 342 with the first mounting bracket 341. S5. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the pad controlling the cutting amount touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the first tool fixing assembly 32 180° and fix it, then tighten the bolts; S8. Rotate the first rotating block 331 to the lower limit position of the first limiting groove 332, and tighten the locking bolt to fix the position of the first rotating block 331. S9. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S10. Close the grinding wheel 71 and remove the tool; S11. Adjust the rotation angle of the second tool holder 64 according to the preset data and lock the second tool holder 64. S12. Insert the cutting tool into the second mounting slot 65 and tighten the cutting tool with bolts; S13. Rotate the second manual rotary wheel 62 to drive the second tool holder 64 to approach the grinding wheel 71 and achieve the preset cutting amount; S14, Open grinding wheel 71 S15. Push the fourth mounting base 61 along the second guide rail 81, and the tool contacts the grinding wheel 71 to perform grooving; S16. Push back the fourth mounting base 61 and close the grinding wheel 71; remove the tool to complete the unidirectional grooving operation on the front face.

[0085] Example 6: A method for sharpening a 90° single-groove centering knife using a multi-functional sharpening machine, characterized by the following steps: S1. Install the double sine fixing device 3 onto the second moving part 9, install the one-way grooving device 6 onto the first moving part 8, and at the same time, place a pre-cutting amount pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the second fixing slot 4251 and fix it. Then, insert the third rotating shaft 422 into the fourth mounting hole, adjust the position of the third rotating shaft 422 and tighten the locking bolt. It is necessary to ensure that the cutting edge of the tool is horizontal. S3. Rotate the second rotating block 431 to the upper limit position of the second limiting groove 432, and tighten the bolt to fix the position of the second rotating block 431. S4. Adjust the angle of the second mounting platform 445, loosen the bolts, place the second gauge block 446 at the bottom of the second contact block 444 to ensure the angle is 45°, and lock the second rotating shaft 442 with the second mounting bracket 441. S5. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Close the grinding wheel 71; S7. Rotate the second rotating block 431 to the lower limit position of the second limiting groove 432, tighten the bolt to fix the position of the second rotating block 431, rotate the third rotating shaft 422 180° and insert it into the fourth mounting hole, adjust the position of the third rotating shaft 422, and tighten the bolt. S8. Open the grinding wheel 71, push the first mounting base 31 to move back and forth on the third linear guide 91, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the other flank face of the tool; S9. Close the grinding wheel 71 and remove the tool; S10. Adjust the rotation angle of the second tool holder 64 according to the preset data and lock the second tool holder 64. S11. Insert the cutting tool into the second mounting slot 65 and tighten the cutting tool with bolts; S12. Rotate the second manual rotary wheel 62 to drive the second tool holder 64 to approach the grinding wheel 71, achieving the preset cutting amount; S13, Open grinding wheel 71 S14. Push the fourth mounting base 61 along the second guide rail 81, and the tool contacts the grinding wheel 71 to perform grooving; S15. Push back the fourth mounting base 61 and close the grinding wheel 71; remove the tool to complete the unidirectional grooving operation on the front face.

[0086] Example 7: A grinding method for a 40° worm gear turning tool using a multi-functional grinding machine, characterized by the following steps: S1. Install the double sine fixing device 3 onto the second moving part 9, and at the same time place a pre-cutting amount pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the second fixing slot 4251 and fix it, and then insert the third rotating shaft 422 into the fourth mounting hole. S3. Adjust the right secondary back face angle of the tool. Place the third gauge block corresponding to 5° at the bottom of the sine drive block and tighten the bolt to make the tool have a 5° right secondary back face deflection angle. S4. Rotate the second rotating block 431 to the upper limit position of the limiting groove, and tighten the bolt to fix the position of the second rotating block 431. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel 71. S5. Adjust the angle of the second mounting platform 445, loosen the bolts, place the second gauge block 446 at the bottom of the second contact block 444 to ensure the angle is 20°, and lock the second rotating shaft 442 with the second mounting bracket 441. S6. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the second linear guide 81, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the angle grinding of the right auxiliary flank face of the tool; S7, Close the grinding wheel 71; S8. Adjust the angle of the left auxiliary back face of the tool. Place the third gauge block corresponding to 10° at the bottom of the sine drive block and tighten the bolt to make the tool have a 10° left auxiliary back face deflection angle. S9. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the second linear guide 81 and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the angle grinding of the left auxiliary back face of the tool; S10. Close the grinding wheel 71 and remove the tool.

[0087] Example 8: A grinding method for a 60° thread cutting tool using a multi-functional grinding machine, characterized by the following steps: S1. Install the double sine fixing device 3 onto the second moving part 9, and at the same time place a pre-cutting amount pad 22 on the bottom of the third screw 23. S2. Tool installation: Insert the tool into the second fixing slot 4251 and fix it, and then insert the third rotating shaft 422 into the fourth mounting hole. S3. Adjust the right rear face angle of the tool. Place the third gauge block corresponding to 5° at the bottom of the sine drive block and tighten the bolt to make the tool have a 5° right rear face deflection angle. S4. Rotate the second rotating block 431 to the middle position of the limiting groove 432, and tighten the bolt to fix the position of the second rotating block 431; S5. Adjust the angle of the second mounting platform 445, loosen the bolts, place the second gauge block 446 at the bottom of the second contact block 444 to ensure the angle is 30°, and lock the second rotating shaft 442 with the second mounting bracket 441. S6. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the second linear guide 81, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the angle grinding of the right rear face of the tool; S7, Close the grinding wheel 71; S8. Adjust the angle of the left rear face of the tool. Place the third gauge block corresponding to 10° at the bottom of the sine drive block and tighten the bolt to make the tool have a 10° left rear face deflection angle. S9. Open the grinding wheel 71, push the second mounting base 41 to move back and forth on the second linear guide 81, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of the left rear face angle of the tool; S10. Close the grinding wheel 71 and remove the tool.

[0088] The above descriptions are merely some embodiments of the present invention. It should be noted that those skilled in the art can make other modifications and improvements without departing from the inventive concept of the present invention, and these all fall within the protection scope of the present invention.

Claims

1. A multi-functional knife sharpening machine, characterized in that, include: Base, lifting device, sine fixing device, double sine fixing device, bidirectional grooving device, unidirectional grooving device, and grinding wheel device; A grinding wheel device is provided in the middle of the base, a lifting device is installed on one side of the base, and a first moving part is provided on the other side of the base opposite to the lifting device. A bidirectional grooving device and a unidirectional grooving device are installed on the first moving part. Alternatively, a bidirectional grooving device or a unidirectional grooving device may be installed on the first moving part. A second moving part is arranged parallel to the first moving part on the lifting device; The second moving part is equipped with a sine wave fixing device and a double sine wave fixing device; Alternatively, a sine wave fixing device or a double sine wave fixing device may be installed on the second moving part.

2. The multi-functional knife sharpening machine according to claim 1, characterized in that, The sine fixing device includes: a first mounting base, a first tool fixing assembly, a first rotating assembly, and a first sine adjustment assembly. The bottom of the first mounting base is connected to the second moving part, the top of the first mounting base is provided with the first sine adjustment assembly, the top of the first sine adjustment assembly is installed with the first rotating assembly, and the first tool fixing assembly is detachably fixed inside the first rotating assembly. The first rotating component adjusts the grinding angle of the tool's back face, and the first sine adjustment component adjusts the grinding angle of the tool profile angle.

3. The multi-functional knife sharpening machine according to claim 2, characterized in that, The first sine adjustment component includes: a first mounting bracket, a first rotating shaft, a first connecting block, a first contact block, a first mounting platform, and a first gauge block. The bottom of the first mounting bracket is fixedly connected to a first mounting seat. Both ends of the first rotating shaft are placed inside the first mounting bracket. One end of the first connecting block is fixedly connected to the first rotating shaft, and the other end of the first connecting block is fixedly connected to the first contact block. The first mounting platform is provided in the middle of the first rotating shaft. The first rotating component is provided on the first mounting platform. Several first gauge blocks are provided. The first gauge blocks, individually or in combination, are placed at the bottom of the first contact block to adjust the angle of the first mounting platform.

4. The multi-functional knife sharpening machine according to claim 3, characterized in that, The first mounting bracket has two parts that fix the two ends of the first rotating shaft respectively. The first mounting bracket has a first mounting hole in the center. The end of the first rotating shaft is placed in the first mounting hole. The first mounting bracket is divided into upper and lower parts and is connected by bolts to hold and fix the first rotating shaft.

5. The multi-functional knife sharpening machine according to claim 4, characterized in that, A first spring is provided between the first connecting block and the first mounting base. The first screw passes through the first connecting block and the first mounting base. The first spring is located between the top of the first screw and the first connecting block. The first spring presses the first contact block toward the first mounting base.

6. The multi-functional knife sharpening machine according to claim 5, characterized in that, The first rotating component includes: a first rotating block and a first limiting groove. The bottom of the first rotating block is connected to the first mounting platform and can rotate on the surface of the first mounting platform. The first limiting groove fixes the first rotating block to the first mounting platform by bolts. The first limiting groove is provided with at least two; The first limiting groove is an arc-shaped groove; The first rotating block has a second mounting hole in the middle, and the first tool fixing assembly is inserted into the second mounting hole. The cross-section of the second mounting hole is the same as the cross-section of the first tool fixing assembly. The bolt extends from the outside of the first rotating block into the second mounting hole and abuts against the first tool fixing assembly.

7. The multi-functional knife sharpening machine according to claim 6, characterized in that, The first tool fixing assembly includes: a tool pressing block, a first fixing groove, a first limiting wedge block, and a first fixing part. The tool pressing block has a through first fixing groove at its center. The tool is inserted into the first fixing groove and its front end extends out of the tool pressing block. The first limiting wedge block is installed in the first fixing groove and contacts the tool. The first fixing part extends from the outside of the tool pressing block into the first fixing groove and abuts against the tool to limit the position of the tool. The pressure block includes: a first positioning surface and a second positioning surface, wherein the first positioning surface and the second positioning surface are symmetrically arranged; The first positioning surface or the second positioning surface serves as the reference surface for the first tool fixing assembly; The first positioning surface and the second positioning surface are V-shaped surfaces.

8. The multi-functional knife sharpening machine according to claim 7, characterized in that, The cross-section of the first fixing groove is a right trapezoid formed by the first reference surface, the second reference surface, the first inclined surface and the first top surface. The first reference surface is opposite to the first inclined surface, the second reference surface is opposite to the first top surface, and the first reference surface and the second reference surface are set perpendicularly. The first reference surface and the second reference surface serve as reference surfaces for tool grinding; the first limiting wedge contacts the first inclined surface and presses the tool against the first reference surface.

9. The multi-functional knife sharpening machine according to claim 8, characterized in that, The first fixing part includes: a first threaded hole, a first bolt, a second threaded hole and a second bolt. The first threaded hole is correspondingly disposed above the second reference surface. The first bolt is connected to the first threaded hole. The first bolt passes through the first threaded hole and abuts against the tool from the top surface and presses the tool against the second reference surface. The second threaded hole is correspondingly located above the first limiting inclined block. The second bolt is connected to the second threaded hole. The second bolt passes through the second threaded hole and abuts against the first limiting inclined block from the top surface, pressing the first limiting inclined block against the second reference surface. The first limiting inclined block compresses the cutting tool to move towards the first reference surface. The first threaded hole and the first bolt are provided in at least two sets, and the second threaded hole and the second bolt are provided in at least two sets.

10. The multi-functional knife sharpening machine according to claim 1, characterized in that, The dual sine fixing device includes: a second mounting base, a tool sine mounting assembly, a second rotating assembly, and a second sine adjustment assembly. The bottom of the second mounting base is connected to a second moving part, the top of the second mounting base is provided with the second sine adjustment assembly, the top of the second sine adjustment assembly is mounted with the second rotating assembly, and the tool sine mounting assembly is detachably fixed to the second rotating assembly. The second sine adjustment component adjusts the grinding angle of the tool profile angle, and the tool sine mounting component controls the grinding angle of the two secondary back faces of the tool.

11. The multi-functional knife sharpening machine according to claim 10, characterized in that, The second sine adjustment assembly includes: a second mounting bracket, a second rotating shaft, a second connecting block, a second contact block, a second mounting platform, and a second gauge block. The bottom of the second mounting bracket is fixedly connected to a second mounting base. Both ends of the second rotating shaft are placed inside the second mounting bracket. One end of the second connecting block is fixedly connected to the second rotating shaft, and the other end of the second connecting block is fixedly connected to the second contact block. The second mounting platform is provided in the middle of the second rotating shaft. The second rotating assembly is provided on the second mounting platform. Several gauge blocks are provided. The gauge blocks, one or more in combination, are placed at the bottom of the second contact block to adjust the angle of the second mounting platform.

12. The multi-functional knife sharpening machine according to claim 11, characterized in that, The second mounting bracket has two parts that fix the two ends of the second rotating shaft respectively. The second mounting bracket has a third mounting hole in the center. The end of the second rotating shaft is placed in the third mounting hole. The second mounting bracket is divided into upper and lower parts and is connected by bolts to hold and fix the second rotating shaft. A spring is provided between the second connecting block and the second mounting base. The screw passes through the second connecting block and the second mounting base. The spring is located between the top of the screw and the second connecting block. The spring presses the second contact block toward the second mounting base.

13. The multi-functional knife sharpening machine according to claim 12, characterized in that, The second rotating component includes: a second rotating block and a second limiting groove. The bottom of the second rotating block is connected to the second mounting platform and can rotate on the surface of the second mounting platform. The second limiting groove fixes the second rotating block to the second mounting platform by bolts. The second limiting groove is provided with at least two; The second limiting groove is an arc-shaped groove.

14. The multi-functional knife sharpening machine according to claim 13, characterized in that, The tool sine mounting assembly includes: a third mounting bracket, a third rotating shaft, a sine drive block, a third gauge block, and a second tool fixing part. The third mounting bracket has a fourth mounting hole at its center. The third rotating shaft is disposed in the fourth mounting hole. The second tool fixing part is disposed in the middle of the third rotating shaft. One end of the third rotating shaft is fixedly connected to one end of the sine drive block. The other end of the sine drive block has a third limiting groove. Several third gauge blocks are disposed at the bottom of the sine drive block near the end of the third limiting groove. The third limiting groove is an arc-shaped groove. The third limiting groove is fixed to the third mounting bracket by bolts. The third gauge blocks limit the rotation angle of the third rotating shaft.

15. The multi-functional knife sharpening machine according to claim 14, characterized in that, The second tool fixing part includes: a second fixing groove, a second limiting wedge and a fixing part. The third rotating shaft is provided with a through second fixing groove at its center. The tool is inserted into the second fixing groove and its front end extends out of the third rotating shaft. The second limiting wedge is installed in the second fixing groove and contacts the tool. The fixing part extends from the outside of the pressure block into the second fixing groove to abut against the tool and limit the position of the tool. The cross-section of the second fixing groove is a right trapezoid formed by the third reference surface, the fourth reference surface, the second inclined surface, and the second top surface. The third reference surface is opposite to the second inclined surface, the fourth reference surface is opposite to the second top surface, and the third reference surface and the fourth reference surface are set perpendicularly.

16. The multi-functional knife sharpening machine according to claim 15, characterized in that, The fixing part includes: a third threaded hole and a third bolt. The third threaded hole is correspondingly disposed above the second limiting inclined block. The third bolt is connected to the third threaded hole. The third bolt passes through the third threaded hole and abuts against the second limiting inclined block from the second top surface and presses the second limiting inclined block towards the fourth reference surface. The second limiting inclined block squeezes the cutting tool to move towards the third reference surface. The third threaded hole and the third bolt are provided in at least two sets.

17. The multi-functional knife sharpening machine according to claim 1, characterized in that, The bidirectional grooving device includes: a third mounting base, a first tool holder, a first moving component, a first limiting component, and a second limiting component. The bottom of the third mounting base is mounted on the first moving part. The first limiting component is mounted on the base and limits the moving position of the third mounting base on the first moving part. The first moving component is vertically arranged on the third mounting base. The bottom of the first moving component is provided with the first tool holder. The second limiting component is mounted on the first moving component and limits the rotation angle of the first tool holder.

18. The multi-functional knife sharpening machine according to claim 17, characterized in that, The first moving component includes: a first linear guide, a first slider, a first manual rotary wheel, a first lead screw, a nut seat, and a sliding plate. The first linear guide is mounted on a third mounting base. The first slider is sleeved on the first linear guide. The first lead screw is arranged parallel to the first linear guide. The top of the first lead screw is connected to the first manual rotary wheel. The nut seat is sleeved on the first lead screw. The sliding plate connects the nut seat and the first slider. The first manual rotary wheel drives the sliding plate to move up and down reciprocally on the first linear guide.

19. The multi-functional knife sharpening machine according to claim 18, characterized in that, The first tool holder is installed in the middle of the sliding plate; The first tool holder includes a third rotating block and a first tool post. One side of the third rotating block is fixedly connected to a sliding plate, and the first tool post is installed on the other side of the third rotating block. The third rotating block drives the first tool post to rotate. The first tool holder is provided with a first mounting groove along its axis, a first limiting block is provided at the bottom of the first mounting groove, and a machining groove is provided above the first limiting block.

20. The multi-functional knife sharpening machine according to claim 19, characterized in that, The second limiting component is mounted on the sliding plate and limits the rotation of the third rotating block and the rotation angle of the first tool holder; The second limiting component includes: a second limiting block, a third limiting block, a fourth limiting block, and a fifth limiting block; The second limiting block and the third limiting block are symmetrically arranged on both sides of the third rotating block, and the second limiting block and the third limiting block move relative to each other to hug the third rotating block; The fourth and fifth limiting blocks are symmetrically mounted on the sliding plate and abut against the first tool holder, thereby limiting the rotation position of the first tool holder.

21. The multi-functional knife sharpening machine according to claim 20, characterized in that, The first limiting component includes: a first limiting part and a second limiting part; The first limiting part and the second limiting part are symmetrically mounted on the base by bolts. The first limiting part limits the movement position of the third mounting base, and the second limiting part limits the movement position of the third mounting base in another direction. The first limiting part includes: a bracket, a spiral push rod, a fifth mounting hole and a sixth mounting hole. The bracket is provided with the fifth mounting hole and the sixth mounting hole. The spiral push rod is threadedly connected to the fifth mounting hole. The spiral push rod abuts against one side of the third mounting seat to limit the movement position of the third mounting seat. The sixth mounting hole is fixed to the base by bolts. The structure of the first limiting part is the same as that of the second limiting part.

22. The multi-functional knife sharpening machine according to any one of claims 1-21, characterized in that, The unidirectional grooving device includes: a fourth mounting base, a second manual rotating wheel, a second lead screw, and a second tool holder. The bottom of the fourth mounting base is connected to the first moving part and moves back and forth on the first moving part. The second lead screw is horizontally arranged on the fourth mounting base. One end of the second lead screw is connected to the second manual rotating wheel, and the other end of the second lead screw is equipped with the second tool holder. The second manual rotating wheel drives the second tool holder to move closer to or away from the grinding wheel device. The second tool holder is provided with a second mounting slot, and the tool is inserted into the second mounting slot and the tool position is fixed by bolts; The second tool holder has its rotation position defined by bolts.

23. The multi-functional knife sharpening machine according to any one of claims 1-21, characterized in that, The lifting device includes a lifting plate, a pad, a screw, and a second manual rotating wheel. The lifting plate is connected to the base via a guide device, the screw is threadedly connected to the lifting plate, the top of the screw is fixedly connected to the second manual rotating wheel, and a pad is provided between the bottom of the screw and the upper surface of the base.

24. The multi-functional knife sharpening machine according to any one of claims 1-21, characterized in that, The first moving part includes: a second linear guide and a second slider, wherein multiple second sliders are provided, and the second sliders are connected to a bidirectional grooving device or a unidirectional grooving device; The second moving part includes a third linear guide and a third slider. Multiple third sliders are provided, and the third sliders are connected to a sine fixing device or a double sine fixing device.

25. The multi-functional knife sharpening machine according to any one of claims 1-21, characterized in that, The grinding wheel device includes a grinding wheel and a drive motor. The grinding wheel is disposed in the middle of the base, and the output end of the drive motor is connected to the grinding wheel and drives the grinding wheel to rotate.

26. Sharpening a blade at 90° using the multi-functional sharpening machine according to any one of claims 1-25. China The method for sharpening a knife is characterized by, Includes the following steps: S1. Install the sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, tighten the bolt to fix the position of the first rotating block, reverse the first tool fixing assembly 180° and fix it, and tighten the bolt. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete another tool Back face S9. Grinding; turn off the grinding wheel and remove the tool.

27. A method for sharpening a 90° centered blade using a multi-functional sharpening machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the double sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole and adjust the position of the third rotating shaft so that the outer arc of the sine drive block 423 contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block 431 and tighten the bolts. S3. Rotate the second rotating block to the middle position of the second limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft so that the outer arc of the sine drive block 423 contacts the calculated pad block. Ensure that the two sides of the blade thickness are parallel to the bottom of the second rotating block 431 and tighten the bolts. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool.

28. A method for sharpening a 90° double-groove centered knife using the multi-functional sharpening machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the sine fixing device onto the second moving part, install the bidirectional grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block 331 to the lower limit position of the first limiting groove, tighten the bolt to fix the position of the first rotating block, reverse the first tool fixing assembly 180° and fix it, and tighten the bolt. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the height of the sliding plate, the position of the first and second limiting parts, and the rotation angle according to the preset specifications; S11. Insert the cutting tool into the first mounting slot, and after the tip of the cutting tool abuts against the first limiting block, tighten the cutting tool with a bolt. S12. Rotate the third rotating block until the outer side of the first tool holder abuts against the fourth limiting block; S13. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S14. Release the second limiting part, rotate the wheel to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and open the grinding wheel. S15. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the first limit part, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket to close the grinding wheel; S17. Rotate the third rotating block until the outer side of the first tool holder abuts against the fifth limiting block; S18. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part, turn to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and at the same time lock the second limiting part and open the grinding wheel; S20. Push the third mounting base along the second rail. The third mounting base moves at a constant speed by the push of the hand and the constant speed rotation of the spiral push rod. The tool contacts the grinding wheel to make grooves until it hits the second limit part, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base, close the grinding wheel, and remove the tool to complete the bidirectional grooving operation on the rake face.

29. A method for sharpening a 90° double-groove centered knife using a multi-functional sharpening machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the double sine fixing device onto the second moving part, install the bidirectional grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole and adjust the position of the third rotating shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S3. Rotate the second rotating block to the middle position of the second limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the blade thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the height of the sliding plate, the position of the first and second limiting parts, and the rotation angle according to the preset specifications; S11. Insert the cutting tool into the first mounting slot, and after the tip of the cutting tool abuts against the first limiting block, tighten the cutting tool with a bolt. S12. Rotate the third rotating block until the outer side of the first tool holder abuts against the fourth limiting block; S13. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S14. Release the second limiting part, rotate the wheel to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and open the grinding wheel. S15. Push the third mounting seat along the second rail. The push force from the hand and the uniform rotation of the spiral push rod achieve the uniform movement of the third mounting seat position. The tool contacts the grinding wheel to make grooves until it hits the first limit, and determines the final end position of the first groove to prevent through-through and scrap. S16. Push back the third mounting bracket to close the grinding wheel; S17. Rotate the third rotating block until the outer side of the first tool holder abuts against the fifth limiting block; S18. Push the second and third limit blocks to hold the third rotating block tightly, and tighten the nut to limit the position of the tool; S19. Loosen the first limiting part, turn to one side with the sixth mounting hole as the center without interfering with the movement of the third mounting seat, and at the same time lock the second limiting part and open the grinding wheel; S20. Push the third mounting seat along the second rail. The push force from the hand and the uniform rotation of the spiral push rod achieve the uniform movement of the third mounting seat position. The tool contacts the grinding wheel to make grooves until it hits the second limit, and determines the final end position of the second groove to prevent through-through and scrap. S21. Push back the third mounting base, close the grinding wheel, and remove the tool to complete the bidirectional grooving operation on the rake face.

30. A method for sharpening a 90° single-groove flat knife using a multi-functional sharpening machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the sine fixing device onto the second moving part, install the one-way grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the first tool fixing assembly and fix it, then lock the first tool fixing assembly onto the first rotating assembly. S3. Rotate the first rotating block to the upper limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; S4. Adjust the angle of the first mounting platform, loosen the bolts, place the first gauge block at the bottom of the first contact block to ensure the angle is 45°, and lock the first mounting bracket to the first rotating shaft. S5. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the first rotating block to the lower limit position of the first limiting groove, and tighten the bolt to fix the position of the first rotating block; Reverse the first tool fixing assembly 180° and fix it, then tighten the bolts; S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the rotation angle of the second tool holder according to the preset data and lock the second tool holder; S11. Insert the cutting tool into the second mounting slot and tighten the cutting tool with bolts; S12. Rotate the second manual rotary wheel to drive the second tool post closer to the grinding wheel to achieve the preset cutting amount; S13, Open the grinding wheel S14. Push the fourth mounting seat along the second guide rail, and the tool contacts the grinding wheel to perform grooving; S15. Push back the fourth mounting base to close the grinding wheel; remove the tool to complete the unidirectional grooving operation on the front face.

31. A grinding method for sharpening a 90° single-groove centered knife using the multi-functional sharpening machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the double sine fixing device onto the second moving part, install the one-way grooving device onto the first moving part, and at the same time place a pre-cutting pad at the bottom of the third bolt. S2. Tool installation: Insert the tool into the second fixing slot and fix it. Then, insert the third rotating shaft into the fourth mounting hole and adjust the position of the third rotating shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. S3. Rotate the second rotating block to the middle position of the second limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S4. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 45°, and lock the second mounting bracket to the second rotating shaft. S5. Open the grinding wheel, push the second mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit and the control cutting amount pad touch. Complete the grinding of one flank face of the cutting tool; S6. Turn off the grinding wheel; S7. Rotate the third shaft 180° and insert it into the fourth mounting hole. Adjust the position of the third shaft so that the outer arc of the sine drive block contacts the calculated pad block. Ensure that both sides of the tool in the thickness direction are parallel to the bottom of the second rotating block and tighten the bolts. It is necessary to ensure that the cutting edge of the tool is horizontal. S8. Open the grinding wheel, push the first mounting base to move back and forth on the third linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the grinding of the other flank face of the tool; S9. Turn off the grinding wheel and remove the tool; S10. Adjust the rotation angle of the second tool holder according to the preset data and lock the second tool holder; S11. Insert the cutting tool into the second mounting slot and tighten the cutting tool with bolts; S12. Rotate the second manual rotary wheel to drive the second tool post closer to the grinding wheel to achieve the preset cutting amount; S13, Open the grinding wheel S14. Push the fourth mounting seat along the second guide rail, and the tool contacts the grinding wheel to perform grooving; S15. Push back the fourth mounting base to close the grinding wheel; remove the tool to complete the unidirectional grooving operation on the front face.

32. A grinding method for a 40° worm gear turning tool using a multi-functional grinding machine according to any one of claims 1-25, characterized in that, Includes the following steps: S1. Install the double sine fixing device onto the second moving part, and at the same time place a shim with a preset cutting amount on the bottom of the third bolt; S2. Tool installation: Insert the tool into the second fixing slot and fix it, then insert the third rotating shaft into the fourth mounting hole; S3. Adjust the angle of the secondary back face on the right side of the tool. Place a third gauge block with a corresponding angle of 5° at the bottom of the sine drive block and tighten the bolt to give the tool a secondary right-side cutting angle of 5°. S4. Rotate the second rotating block to the middle position of the limiting groove, and tighten the locking bolt to fix the position of the second rotating block. It is necessary to ensure that the tool axis is perpendicular to the grinding wheel. S5. Adjust the angle of the second mounting platform, loosen the bolts, place the second gauge block at the bottom of the second contact block to ensure the angle is 20°, and lock the second mounting bracket to the second rotating shaft. S6. Open the grinding wheel, push the second mounting base to move back and forth on the second linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the angle grinding of one secondary flank face of the tool; S7. Turn off the grinding wheel; S8. Adjust the angle of the secondary back face on the left side of the tool. Place the third gauge block corresponding to 10° at the bottom of the sine drive block and tighten the bolt to give the tool a 10° secondary cutting angle on the left side. S9. Open the grinding wheel, push the second mounting base to move back and forth on the second linear guide, and adjust the handwheel to gradually add grinding allowance until the limit contact with the pad controlling the cutting amount. Complete the angle grinding of the other secondary flank face of the tool; S10. Turn off the grinding wheel and remove the tool.

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