A multi-edge blade sharpening device

Abstract

The application discloses a multi-edge blade polishing device, which comprises a rack, a polishing mechanism, a lifting driving mechanism, a rotating driving mechanism, a polishing tool and a spraying cooling mechanism. During polishing, the rotating driving mechanism drives the blade to periodically and reversibly rotate in a single-edge angle range, and the lifting driving mechanism controls the blade to slowly descend in multiple sections to complete one-by-one polishing close to the high-speed rotating polishing grinding wheel. In addition, the device is provided with an automatic compensation mechanism, a laser displacement sensor is used to monitor the grinding wheel wear in real time, a PLC control module drives the second screw rod sliding block mechanism to displace in the direction from the center of the grinding wheel to the polishing point connecting line, and the rotating speed of the grinding wheel is dynamically increased to maintain constant linear speed. The application avoids the heat stress unilateral concentration caused by one-way grinding, eliminates the size deviation caused by the grinding wheel wear, and greatly improves the polishing uniformity and size consistency of the blade edge.

Description

Technical Field

[0001] This invention relates to the field of cutting tool machining and automated grinding equipment, and in particular to a multi-edge blade grinding device. Background Technology

[0002] In the manufacturing process of multi-edge cutting inserts, the edge grinding process is a crucial step. The grinding process not only needs to ensure the absolute sharpness and spatial geometric accuracy of each individual edge, but also must ensure the consistency of geometric parameters between the various edges on the same insert with extremely stringent tolerance standards.

[0003] However, traditional blade sharpening devices and existing grinding processes have several drawbacks: First, unidirectional grinding leads to surface thermal stress concentration and asymmetry. When grinding multi-edged cutting tools with complex angles, traditional equipment often only drives the workpiece or grinding wheel to perform fixed feed and unidirectional grinding in one direction. This unidirectional grinding action makes it difficult to ensure the uniformity of grinding on the curved surface of the cutting edge and complex tool tip angles, and it is very easy to leave unidirectional grinding marks with obvious directionality on the back face or rake face of the cutting edge.

[0004] Furthermore, grinding wheel wear leads to significant dimensional deviations in the cutting tool. After prolonged grinding of high-hardness cutting tools, the grinding wheel wears down. This process reduces the overall effective working radius of the grinding wheel. Traditional equipment lacks a high-precision online real-time compensation mechanism, typically relying on workers periodically stopping the machine to measure and manually adjust the compensation using tools such as micrometers. This method heavily depends on manual experience, is extremely inefficient, and easily introduces human measurement errors, making it difficult to guarantee the dimensional consistency of multi-edge cutting tools. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-edge blade grinding device to solve the technical problems of uneven grinding, large unidirectional grinding stress, and large blade grinding dimensional deviation caused by grinding wheel wear in the prior art when grinding multi-edge blades.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is: to provide a multi-edge blade grinding device, comprising: The frame serves as the load-bearing reference for the entire equipment. A grinding mechanism is mounted on the frame and includes a grinding motor and a grinding wheel that is driven by the grinding motor to rotate at high speed. A lifting drive mechanism is provided on the frame, and the lifting drive mechanism includes a lifting motor and a first lead screw slider mechanism driven by the lifting motor. A rotary drive mechanism is mounted on the slider of the first lead screw and slider mechanism and moves up and down with it. The rotary drive mechanism includes a rotary motor and a reducer. A grinding fixture is installed on the output shaft of the reducer and is used to precisely position and fix the multi-edged blade to be ground. The spray cooling mechanism includes a spray water pipe, a control valve, and a water supply pump located above or to the side of the grinding wheel, for spraying and cooling the grinding contact area between the blade and the grinding wheel. In the grinding operation, the rotary motor drives the grinding fixture and the blade fixed thereon to rotate periodically in both directions within the angle range occupied by a single cutting edge through the reducer; the lifting motor drives the first lead screw slider mechanism to lower the blade and bring it closer to the grinding wheel, so as to grind each cutting edge of the blade one by one.

[0007] In one embodiment, the grinding device further includes an automatic compensation mechanism for correcting grinding wheel wear errors, the automatic compensation mechanism comprising: The second lead screw and slider mechanism is fixedly installed on the frame. The sliding direction of the slider in the second lead screw and slider mechanism is configured to be along the three-dimensional line connecting the center of the grinding wheel to the grinding point. The grinding point is the spatial point position where the grinding wheel contacts the cutting edge of the multi-blade blade when grinding. A compensation motor is connected to and used to drive the second lead screw and slider mechanism; A protective cover is provided on the outside of the grinding wheel and installed on the slider of the second lead screw and slider mechanism. The grinding motor is also integrally installed on the slider platform of the second lead screw and slider mechanism. A laser displacement sensor is mounted on the protective cover and is used for non-contact real-time monitoring of the wear of the grinding wheel.

[0008] In one embodiment, the detection end of the laser displacement sensor is fixed inside the protective cover, and its detection beam direction is perpendicular to the outer peripheral edge of the grinding wheel. By detecting the change in the absolute distance between the edge of the grinding wheel and the laser displacement sensor at high frequency, the real-time working radius and wear status of the grinding wheel can be calculated and monitored.

[0009] In one embodiment, the grinding device further includes an industrial PLC control module, wherein the signal output terminal of the laser displacement sensor is communicatively connected to the analog or digital input terminal of the PLC control module, for transmitting the real-time measured wear data to the PLC control module. The control output terminal of the PLC control module is communicatively connected to the driver of the compensation motor. When the grinding wheel wears down due to long-term operation, causing its radius to decrease, the PLC control module controls the compensation motor through a preset servo closed-loop algorithm to drive the slider of the second lead screw slider mechanism to slide forward. The sliding displacement compensation of the slider is numerically equal to the wear amount of the grinding wheel.

[0010] In one embodiment, the PLC control module is internally configured with a time-sequenced interlock protection logic. The timing for the automatic compensation mechanism to perform displacement compensation on the grinding wheel is strictly limited to the gap period after the first lead screw slider mechanism drives the blade to lift and reset, and the system is in a non-grinding contact no-load state, so as to avoid adjusting the grinding wheel during the grinding of the cutting blade and causing machining vibration or overcutting.

[0011] In one embodiment, a frequency converter is connected in series in the power supply circuit of the grinding motor, and the frequency control terminal of the frequency converter is electrically connected to the PLC control module. The PLC control module has a built-in dynamic calculation algorithm for constant cutting line speed. Based on the current radius data of the grinding wheel transmitted in real time by the laser displacement sensor, the PLC control module sends a frequency gain adjustment signal to the frequency converter of the grinding motor in real time. When the radius of the grinding wheel decreases, the rotation speed of the grinding motor is dynamically and continuously increased to ensure that the edge of the grinding wheel always maintains a constant cutting line speed at the grinding point.

[0012] In one embodiment, the water supply end of the spray cooling mechanism is connected to a variable frequency water pump, and the speed control end of the variable frequency water pump establishes an electrical signal mapping linkage relationship with the PLC control module. When the radius of the grinding wheel decreases and the PLC control module controls the grinding motor speed to increase, the PLC control module simultaneously issues a command to control the variable frequency water pump to automatically increase the output power, dynamically increasing the spray pressure and initial velocity of the coolant sprayed from the spray pipe. By intelligently adjusting the fluid kinetic energy of the cooling jet, it can accurately penetrate the aerodynamic boundary layer on the surface of the grinding wheel caused by centrifugal force and air viscosity under different high-speed working conditions.

[0013] In one embodiment, the lifting motor and the first lead screw-slider mechanism it drives have a multi-speed feed control mode: During the grinding process, the lifting motor first drives the first lead screw and slider mechanism to descend rapidly at a first speed to a safe distance from the grinding point; then it switches to a second speed, which is lower than the first speed, for extremely slow descent and feed, so as to control the blade to slowly approach the grinding wheel and perform stable material cutting. The amount of grinding by the blade is precisely controlled by controlling the downward movement coordinate value; when the set grinding completion position is reached, the lifting motor drives the first lead screw and slider mechanism to rise and reset in a fast mode.

[0014] In one embodiment, a positioning block is provided on the mounting end face of the grinding fixture and an internal threaded hole is provided. Correspondingly, a positioning hole matching the positioning block and a locking through hole penetrating the blade body are provided on the multi-edged blade to be ground. During blade installation, the positioning hole on the blade is tightly inserted into the positioning block of the grinding fixture to constrain the rotational freedom. Then, the fastening threaded part is inserted into the locking through hole and threaded into the threaded hole of the grinding fixture to rigidly install and fix the blade to the grinding fixture.

[0015] In one embodiment, the control method for the periodic forward and reverse rotation within the angular range occupied by the single cutting edge is specifically as follows: The rotary motor drives the blade to rotate at a constant speed or a set acceleration / deceleration curve from the initial 0° to the maximum angle occupied by the cutting edge; after reaching the maximum angle, it rotates back to 0° from the maximum angle, and this alternating cycle is maintained until the grinding feed of the cutting edge is completed; when the current cutting edge is ground and the blade rises and resets, the rotary motor drives the blade to rotate step into the angle range of the next single cutting edge, so as to perform the next round of periodic forward and reverse rotation grinding.

[0016] The above-described technical solutions in the embodiments of the present invention have at least the following technical effects or advantages: The multi-edge cutting tool grinding device provided in this invention uses a rotary drive mechanism to drive the cutting tool to perform periodic alternating forward and reverse rotation within a specified angle range of a single cutting edge. Combined with a multi-segment speed servo gradual descent feed via a first lead screw and slider mechanism, this creates a complex, interlaced grinding pattern between the workpiece cutting edge and the grinding wheel. This not only avoids excessive heat concentration on one side caused by traditional unidirectional grinding and eliminates unidirectional tensile stress on the cutting edge surface, but also significantly reduces the microscopic surface roughness (Ra value) of the cutting edge, ensuring that all cutting edge parameters of the multi-edge cutting tool are highly consistent at the microscopic level.

[0017] Furthermore, this invention sets the mechanical feed direction of the second lead screw slider mechanism to the direction of the line connecting the center of the circle to the grinding point. This ensures that no matter how worn the grinding wheel becomes, the physical position of the grinding tangential point after the compensated feed and its grinding tangential vector (the direction of the linear velocity of the grinding point) remain unchanged, significantly improving the stability of product dimensions during mass production.

[0018] Furthermore, the real-time radius of the grinding wheel is obtained through a laser displacement sensor, and the PLC controller dynamically controls the grinding motor to increase the wheel speed. This effectively avoids problems such as decreased linear speed and sharp increase in cutting normal force caused by reduced wheel wear, thus preventing micro-cracks or surface thermal burns on the carbide cutting tool and ensuring that the grinding wheel remains in good grinding condition throughout its service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural diagram of a multi-edged blade after grinding. Figure 2 This is a front structural diagram of the multi-blade grinding device provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the back structure of the multi-blade grinding device provided in an embodiment of the present invention; Figure 4 A magnified view of a portion of the structure when an unprocessed cutting tool is mounted onto a grinding fixture; Figure 5 This is a schematic diagram of the grinding fixture structure after the blade has been removed and unloaded. Figure 6 A schematic diagram of the front structure of the multi-blade grinding device after displacement compensation by the automatic compensation mechanism.

[0021] The labels for the various figures are as follows: 1. Grinding motor; 2. Grinding wheel; 3. Lifting motor; 4. First lead screw and slider mechanism; 5. Rotary motor; 6. Reducer; 7. Grinding fixture; 8. Spray water pipe; 9. Multi-edged blade; 10. Second lead screw and slider mechanism; 11. Compensating motor; 12. Protective cover; 13. Laser displacement sensor; 14. Positioning hole; 15. Locking through hole; 16. Positioning block; 17. Threaded part; 18. Threaded hole. Detailed Implementation

[0022] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0023] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0024] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0026] like Figure 2 and Figure 3 As shown, this embodiment of the invention provides a multi-blade blade 9 grinding device, which mainly includes a frame, a grinding mechanism, a lifting drive mechanism, a rotating drive mechanism, a grinding fixture 7, and a spray cooling mechanism.

[0027] The frame (not shown in the figure) serves as the load-bearing reference for the entire equipment, and is used to stably support each operating component.

[0028] The grinding mechanism is mounted on the frame. The mechanism includes a grinding motor 1 and a grinding wheel 2 driven by the grinding motor 1 to rotate at high speed. It is responsible for providing grinding power and performing grinding operations on the cutting tools.

[0029] The lifting drive mechanism is also mounted on the frame, including a lifting motor 3 and a first lead screw and slider mechanism 4 driven by the lifting motor 3. This mechanism is mainly responsible for controlling the feed movement of the blade in the vertical direction.

[0030] The rotary drive mechanism is mounted on the slider of the first lead screw and slider mechanism 4, and moves up and down as a whole with the slider. The rotary drive mechanism includes a rotary motor 5 and a reducer 6.

[0031] The grinding fixture 7 is mounted on the output shaft of the reducer 6 and is used to precisely position and fix the multi-edged cutting blade 9 to be ground. Figure 4 and Figure 5 As shown, a positioning block 16 is raised on the mounting end face of the grinding fixture 7 and has an internal threaded hole 18. Correspondingly, the multi-edged blade 9 to be ground has a positioning hole 14 that matches the positioning block 16, and a locking through hole 15 that penetrates the blade body. When installing the blade, the positioning hole 14 on the blade is tightly inserted into the positioning block 16 of the grinding fixture 7, achieving complete constraint on the rotational degree of freedom; then the fastening threaded part 17 is inserted into the locking through hole 15 and threaded into the threaded hole 18 of the grinding fixture 7 to rigidly install and fix the blade onto the grinding fixture 7. The spray cooling mechanism includes a spray water pipe 8, a control valve, and a water supply pump located above or to the side of the grinding wheel 2. It is specifically designed to spray and cool the high-temperature grinding contact area between the blade and the grinding wheel 2 to prevent thermal burns.

[0032] During the polishing process, the control method in this embodiment is as follows: 1. Rotary Alternating Control: The rotary motor 5 drives the grinding fixture 7 and the blade fixed thereon to perform periodic forward and reverse rotation within the angle range occupied by a single cutting edge via the reducer 6. Specifically, the rotary motor 5 drives the blade to rotate at a constant speed or a set acceleration / deceleration curve from the initial 0° to the maximum angle occupied by the cutting edge; after reaching the maximum angle, it rotates back to 0° from the maximum angle, and this alternating cycle is maintained until the grinding feed of the cutting edge is completed. When the current cutting edge is finished grinding and the blade rises and resets, the rotary motor 5 drives the blade to rotate step by step into the next angle range of the single cutting edge to perform the next round of periodic forward and reverse rotation grinding.

[0033] 2. Multi-stage speed feed control: The lifting motor 3 and its driven first lead screw slider mechanism 4 have a multi-stage speed feed control mode. During the grinding process, the lifting motor 3 first drives the first lead screw slider mechanism 4 to descend rapidly at a first speed to a safe distance from the grinding point; then it switches to a second speed, which is lower than the first speed, for extremely slow descent and feed, so as to control the blade to slowly approach the grinding wheel 2 and perform stable material cutting. The grinding amount of the blade is precisely controlled by controlling the downward movement coordinate value; when the set grinding completion position is reached, the lifting motor 3 drives the first lead screw slider mechanism 4 to rise and reset in a rapid mode. In one embodiment, to address the dimensional deviation problem caused by wear of the grinding wheel 2 during long-term operation, this embodiment further adds an automatic compensation mechanism for correcting grinding wheel wear errors and a corresponding dynamic speed regulation system.

[0034] like Figure 3 and Figure 6 As shown, the automatic compensation mechanism specifically includes: a second lead screw and slider mechanism 10, a compensation motor 11, a protective cover 12, an overall mounting platform, and a laser displacement sensor 13.

[0035] The second lead screw slider mechanism 10 is fixedly installed on the frame. The sliding direction of the slider in the second lead screw slider mechanism 10 is configured to be along the three-dimensional line connecting the center of the grinding wheel 2 to the grinding point. The grinding point is the spatial point where the grinding wheel 2 contacts the cutting edge of the multi-blade blade 9 when grinding.

[0036] The compensating motor 11 is connected to and used to drive the second lead screw slider mechanism 10.

[0037] The protective cover 12 is placed on the outside of the grinding wheel 2 and installed on the slider of the second lead screw and slider mechanism 10, and the grinding motor 1 is also installed on the slider platform of the second lead screw and slider mechanism 10.

[0038] A laser displacement sensor 13 is mounted on the protective cover 12 for non-contact real-time monitoring of the wear of the grinding wheel 2. The detection end of the laser displacement sensor 13 is fixed inside the protective cover 12, and its detection beam is perpendicular to the outer peripheral edge of the grinding wheel 2. By frequently detecting the change in the absolute distance between the edge of the grinding wheel 2 and the laser displacement sensor 13, the real-time working radius and wear status of the grinding wheel 2 can be calculated and monitored in real time. Furthermore, this embodiment also includes an industrial PLC control module, whose control logic and adjustment mechanism are as follows: Automatic wear compensation control: The signal output terminal of the laser displacement sensor 13 is connected to the input terminal of the PLC control module, transmitting the measured wear data to the PLC. When the grinding wheel 2 wears down due to prolonged operation, causing a reduction in radius, the PLC controls the compensation motor 11 through a preset servo closed-loop algorithm, driving the slider of the second lead screw slider mechanism 10 to slide forward. The sliding displacement compensation of the slider is numerically equal to the wear of the grinding wheel 2. In addition, the PLC has a time-sequenced interlock protection logic. The triggering time of displacement compensation is strictly limited to the gap period after the first lead screw slider mechanism 4 drives the blade to lift and reset, and when the system is in a non-grinding contact no-load state, to avoid adjusting the grinding wheel 2 during the grinding of the cutting blade, which could cause machining vibration or overcutting.

[0039] Constant cutting speed control: A frequency converter is connected in series in the power supply circuit of the grinding motor 1, and this frequency converter is electrically connected to the PLC. The PLC has a built-in dynamic calculation algorithm for constant cutting speed. Based on the real-time transmitted data of the current radius of the grinding wheel, it sends a frequency gain adjustment signal to the frequency converter in real time. When the radius of the grinding wheel decreases, the rotational speed of the grinding motor 1 is dynamically and continuously increased to ensure that the edge of the grinding wheel maintains a constant cutting speed at the grinding point, preventing a sharp increase in cutting force and surface burning. Intelligent spray linkage control: The water supply end of the spray cooling mechanism is connected to a variable frequency water pump, and its speed control end establishes an electrical signal mapping linkage relationship with the PLC. When the grinding wheel becomes smaller and the speed of grinding motor 1 increases, the PLC synchronously controls the variable frequency water pump to automatically increase the output power, dynamically increasing the spray pressure and initial velocity of the coolant. By intelligently adjusting the fluid kinetic energy, it accurately penetrates the aerodynamic boundary layer generated on the surface of the grinding wheel due to centrifugal force and air viscosity under high-speed conditions, ensuring the cooling effect. The specific workflow is as follows: 1. Blade installation: Before grinding, install the unground blade onto the grinding fixture 7 by inserting the positioning hole 14 on the blade into the positioning block 16 of the grinding fixture 7, and then inserting the threaded part 17 into the locking through hole 15 and threadedly connecting it into the threaded hole 18 of the grinding fixture 7 to rigidly install and fix the blade onto the grinding fixture 7.

[0040] 2. Grinding Operation: Start the grinding motor 1 to drive the grinding wheel 2 to rotate at high speed; the rotary motor 5 drives the input shaft of the reducer 6 through the pulley to perform the first cycle of forward and reverse rotation, driving the blade to rotate (taking a four-edge blade as an example, the blade first rotates from 0° to 90°, and then from 90° to 0°, thus cycling at a constant speed); then the lifting motor 3 drives the first lead screw slider mechanism 4 to quickly descend to a safe distance, open the spray valve, and then lowers at a very slow speed to control the blade to slowly touch the grinding wheel 2 to perform grinding; the grinding amount is controlled by the downward moving coordinate value. After grinding is completed, the lifting motor 3 drives the mechanism to rise quickly; the rotary motor 5 then drives the blade to step into the next angle range (such as rotating from 90° to 180°, and then reversing from 180° to 90° in a constant speed cycle), and the lifting motor 3 lowers again in the above feeding method to grind the second edge, until each edge is ground one by one. Throughout the grinding cycle, the laser displacement sensor 13 detects the wear of the grinding wheel in real time, and in the no-load gap, it works with the PLC and automatic compensation mechanism to achieve precise position compensation and dynamic increase of spindle speed and water pump pressure.

[0041] 3. Blade Disassembly and Inspection: After the grinding process is completed, the lifting motor 3 drive mechanism quickly rises and resets, and all motors stop working; the worker loosens the threaded part 17 to remove the ground blade (e.g., Figure 1 and Figure 5 (As shown), install a new blade to prepare for the next cycle. Finally, perform a quality inspection of the removed blades using inspection tools, visual inspection, or other methods. The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-blade grinding device, characterized in that, include: The frame serves as the load-bearing reference for the entire equipment. A grinding mechanism is mounted on the frame and includes a grinding motor and a grinding wheel that is driven by the grinding motor to rotate at high speed. A lifting drive mechanism is provided on the frame, and the lifting drive mechanism includes a lifting motor and a first lead screw slider mechanism driven by the lifting motor. A rotary drive mechanism is mounted on the slider of the first lead screw and slider mechanism and moves up and down with it. The rotary drive mechanism includes a rotary motor and a reducer. A grinding fixture is installed on the output shaft of the reducer and is used to precisely position and fix the multi-edged blade to be ground. The spray cooling mechanism includes a spray water pipe, a control valve, and a water supply pump located above or to the side of the grinding wheel, for spraying and cooling the grinding contact area between the blade and the grinding wheel. In the grinding operation, the rotary motor drives the grinding fixture and the blade fixed thereon to rotate periodically in both directions within the angle range occupied by a single cutting edge through the reducer; the lifting motor drives the first lead screw slider mechanism to lower the blade and bring it closer to the grinding wheel, so as to grind each cutting edge of the blade one by one.

2. The multi-blade grinding device according to claim 1, characterized in that, The grinding device further includes an automatic compensation mechanism for correcting grinding wheel wear errors, the automatic compensation mechanism comprising: The second lead screw and slider mechanism is fixedly installed on the frame. The sliding direction of the slider in the second lead screw and slider mechanism is configured to be along the three-dimensional line connecting the center of the grinding wheel to the grinding point. The grinding point is the spatial point position where the grinding wheel contacts the cutting edge of the multi-blade blade when grinding. A compensation motor is connected to and used to drive the second lead screw and slider mechanism; A protective cover is provided on the outside of the grinding wheel and installed on the slider of the second lead screw and slider mechanism. The grinding motor is also integrally installed on the slider platform of the second lead screw and slider mechanism. A laser displacement sensor is mounted on the protective cover and is used for non-contact real-time monitoring of the wear of the grinding wheel.

3. The multi-blade grinding device according to claim 2, characterized in that: The detection end of the laser displacement sensor is fixed inside the protective cover, and its detection beam direction is perpendicular to the outer peripheral edge of the grinding wheel. By detecting the change in the absolute distance between the edge of the grinding wheel and the laser displacement sensor at high frequency, the real-time working radius and wear status of the grinding wheel can be calculated and monitored.

4. The multi-edge blade grinding device according to claim 3, characterized in that: The grinding device also includes an industrial PLC control module. The signal output terminal of the laser displacement sensor is communicatively connected to the analog or digital input terminal of the PLC control module, which is used to transmit the real-time measured wear data to the PLC control module. The control output terminal of the PLC control module is communicatively connected to the driver of the compensation motor. When the grinding wheel wears down due to long-term operation, causing its radius to decrease, the PLC control module controls the compensation motor through a preset servo closed-loop algorithm to drive the slider of the second lead screw slider mechanism to slide forward. The sliding displacement compensation of the slider is numerically equal to the wear amount of the grinding wheel.

5. The multi-blade grinding device according to claim 4, characterized in that: The PLC control module is internally configured with a time-sequenced interlock protection logic. The timing for the automatic compensation mechanism to compensate for the displacement of the grinding wheel is strictly limited to the gap period after the first lead screw and slider mechanism drives the blade to lift and reset, and the system is in a non-grinding contact no-load state, so as to avoid adjusting the grinding wheel during the grinding of the cutting blade and causing machining vibration or overcutting.

6. The multi-edge blade grinding device according to claim 4, characterized in that: A frequency converter is connected in series in the power supply circuit of the grinding motor, and the frequency control terminal of the frequency converter is electrically connected to the PLC control module. The PLC control module has a built-in dynamic calculation algorithm for constant cutting line speed. Based on the current radius data of the grinding wheel transmitted in real time by the laser displacement sensor, the PLC control module sends a frequency gain adjustment signal to the frequency converter of the grinding motor in real time. When the radius of the grinding wheel decreases, the rotation speed of the grinding motor is dynamically and continuously increased to ensure that the edge of the grinding wheel always maintains a constant cutting line speed at the grinding point.

7. The multi-blade grinding device according to claim 6, characterized in that: The water supply end of the spray cooling mechanism is connected to a variable frequency water pump, and the speed control end of the variable frequency water pump establishes an electrical signal mapping linkage relationship with the PLC control module. When the radius of the grinding wheel decreases and the PLC control module controls the grinding motor speed to increase, the PLC control module simultaneously issues a command to control the variable frequency water pump to automatically increase the output power, dynamically increasing the spray pressure and initial velocity of the coolant sprayed from the spray pipe. By intelligently adjusting the fluid kinetic energy of the cooling jet, it can accurately penetrate the aerodynamic boundary layer on the surface of the grinding wheel caused by centrifugal force and air viscosity under different high-speed working conditions.

8. The multi-blade grinding device according to claim 1, characterized in that: The lifting motor and the first lead screw-slider mechanism it drives have a multi-speed feed control mode: During the grinding process, the lifting motor first drives the first lead screw and slider mechanism to descend rapidly at a first speed to a safe distance from the grinding point; then it switches to a second speed, which is lower than the first speed, for extremely slow descent and feed, so as to control the blade to slowly approach the grinding wheel and perform stable material cutting. The amount of grinding by the blade is precisely controlled by controlling the downward movement coordinate value; when the set grinding completion position is reached, the lifting motor drives the first lead screw and slider mechanism to rise and reset in a fast mode.

9. A multi-blade grinding device according to claim 1, characterized in that: The mounting end face of the grinding fixture is provided with a positioning block and an internal threaded hole. Correspondingly, the multi-edged blade to be ground is provided with a positioning hole that matches the positioning block and a locking through hole that penetrates the blade body. During blade installation, the positioning hole on the blade is tightly inserted into the positioning block of the grinding fixture to constrain the rotational freedom. Then, the fastening threaded part is inserted into the locking through hole and threaded into the threaded hole of the grinding fixture to rigidly install and fix the blade to the grinding fixture.

10. A multi-blade grinding device according to claim 1, characterized in that, The control method for the periodic forward and reverse rotation within the angular range occupied by the single cutting edge is as follows: The rotary motor drives the blade to rotate at a constant speed or a set acceleration / deceleration curve from the initial 0° to the maximum angle occupied by the cutting edge; after reaching the maximum angle, it rotates back to 0° from the maximum angle, and this alternating cycle is maintained until the grinding feed of the cutting edge is completed; when the current cutting edge is ground and the blade rises and resets, the rotary motor drives the blade to rotate step into the angle range of the next single cutting edge, so as to perform the next round of periodic forward and reverse rotation grinding.

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