High-efficiency grinding machine for straight linear guide rail surface polishing and using method thereof

Abstract

The present application belongs to linear guide rail surface polishing device technical field, especially kind of linear guide rail surface polishing with high -efficient grinding machine and its using method, grinding machine includes: base, workbench magnetic table, linear drive mechanism, first gantry, top surface polishing piece, second gantry, two groups of side polishing piece, fixed frame, two groups of positioning piece and centering drive mechanism;Compared with prior art, the grinding machine of the present application can actively, accurately centering positioning before workpiece is adsorbed by workbench magnetic table, and can make positioning piece away from workpiece after positioning is completed, avoid interference to grinding process.

Description

Technical Field

[0001] This invention belongs to the technical field of linear guide surface grinding devices, and particularly relates to a high-efficiency grinding machine for linear guide surface grinding and its usage method. Background Technology

[0002] Linear guides require surface grinding during manufacturing to ensure flatness and smoothness, and to remove scratches and other defects generated during processing. Grinding machines are specialized equipment commonly used in linear guide manufacturing for precision grinding of the guide surface.

[0003] Traditional grinding machines often require grinding different surfaces in stages when grinding linear guideways. For example, one side is ground first, then the workpiece is re-clamped and the other side is ground, and finally the top surface is ground. This repeated clamping operation is not only time-consuming, but also introduces positioning errors, thus affecting the machining accuracy of each surface of the guideway and the positional accuracy between them.

[0004] To overcome the above-mentioned defects, patent document CN119036234A discloses a linear guideway grinding machine, which uses a magnetic table to attract and clamp the workpiece, avoiding the obstruction of the machining surface by mechanical fixtures and achieving high clamping efficiency. At the same time, by setting up a first gantry and a second gantry, and installing vertical grinding heads one and two oppositely arranged on the second gantry, it can achieve simultaneous grinding of both sides of the guideway. In conjunction with the spindle head one on the first gantry for grinding the top surface, it effectively reduces the number of clamping operations and improves machining accuracy and efficiency.

[0005] However, this solution still has shortcomings in practical applications. Since the magnetic table only has an adsorption function and lacks the ability to precisely center and position the workpiece, the workpiece cannot be accurately positioned at the machining reference position when placed on the magnetic table. To address this, the solution incorporates a centering guide mechanism at the bottom of the vertical grinding head, consisting of a clamping plate, movable wheels, and telescopic springs, to passively center the workpiece during grinding. However, this centering guide mechanism remains in constant contact with the workpiece surface during grinding, increasing the structural complexity of the vertical grinding head and potentially causing friction on the workpiece surface. Furthermore, this passive centering mechanism can only correct small positional deviations. If the initial placement deviation of the workpiece is too large, the movable wheels cannot push the workpiece to the correct position. Therefore, the operator still needs to perform a relatively detailed coarse positioning operation when placing the workpiece. For guide rail workpieces that are long or heavy, this operation is time-consuming and labor-intensive, hindering the improvement of overall processing efficiency.

[0006] Furthermore, since the centering guide mechanism is in continuous contact with the workpiece during the grinding process, its correction capability is limited by the elastic force of the spring and the stroke range of the movable wheel, making it difficult to achieve precise active centering. The stability and consistency of the machining process still need to be improved. Summary of the Invention

[0007] The purpose of this invention is to address the aforementioned technical problems by providing a high-efficiency grinding machine for grinding the surface of linear guideways and its method of use. This grinding machine can actively and accurately center and position the workpiece before the magnetic table of the worktable adsorbs the workpiece, and can move the positioning part away from the workpiece after positioning to avoid interference with the grinding process.

[0008] In view of this, the present invention provides a high-efficiency grinding machine for grinding the surface of linear guideways, comprising: The base has a magnetic worktable on it. The magnetic worktable can attract or release the workpiece by turning the power on and off. The magnetic worktable can move on the base along its own length. Linear drive mechanism, used to drive the worktable magnetic table to perform reciprocating linear motion on the base; The first gantry frame is located in the middle of the base and is situated on the moving track of the magnetic table. A top surface grinding component is installed on the first gantry frame for grinding the top surface of the workpiece. The second gantry is located in the middle of the base and is spaced apart from the first gantry. The second gantry is located on the moving track of the worktable magnetic table. The second gantry is equipped with two sets of side grinding parts arranged symmetrically with respect to the axis of the worktable magnetic table. The two sets of side grinding parts are used to grind the two sides of the workpiece respectively. A fixed frame is installed at one end of the base and is located on the moving track of the magnetic table of the worktable; Two sets of positioning components are arranged symmetrically with respect to the axis of the magnetic table. Both sets of positioning components are slidably connected to the fixed frame along the width direction of the magnetic table, and a space for placing the workpiece is formed between the two sets of positioning components. The centering drive mechanism is mounted on the fixed frame and is used to drive the two sets of positioning components to move closer or further apart synchronously. Among them, the two sets of positioning components can abut against the two side walls of the workpiece respectively as they approach each other, thereby centering and positioning the workpiece.

[0009] In the above technical solution, each group of positioning components includes at least two positioning blocks that are spaced apart along the length of the magnetic table of the worktable, and two adjacent positioning blocks in each group of positioning components are connected by a linkage plate.

[0010] In the above technical solution, each set of positioning components is further provided with sliding strips at both ends, and the fixed frame is provided with sliding grooves for each sliding strip to slide along the width direction of the magnetic table of the worktable.

[0011] In the above technical solution, the centering drive mechanism further includes: Two drive sleeves are symmetrically arranged on both sides of the fixed frame with respect to the axis of the magnetic table. The two drive sleeves are coaxially distributed and can rotate along their own axis on the fixed frame. Each drive sleeve has a receiving groove at one end that is close to the other. The outer walls of the two drive sleeves are sequentially provided with a fast drive groove and a slow drive groove that are interconnected along the axial direction. Both the fast drive groove and the slow drive groove are connected to the receiving groove. The angle between the extension line of the length direction of the fast drive groove and the axis of the drive sleeve is smaller than the angle between the extension line of the length direction of the slow drive groove and the axis of the drive sleeve. Two drive rods, one end of which is slidably disposed in two receiving grooves along the axial direction, and the other end of which is connected to two sets of positioning parts respectively; Two drive pins are slidably disposed in the fast drive groove or slow drive groove on the two drive sleeves respectively. The two drive pins are connected to two drive rods respectively. The drive pins can only slide along the length of the fast drive groove in the fast drive groove and can only slide along the length of the slow drive groove in the slow drive groove. The drive pins can slide between the fast drive groove and the slow drive groove. The synchronous drive mechanism can drive two drive sleeves to rotate synchronously, thereby causing the fast drive grooves or slow drive grooves on the two drive sleeves to drive the two transmission pins to slide, which in turn causes the two transmission pins to drive the two drive rods to move closer or further apart.

[0012] In the above technical solution, furthermore, one drive sleeve can be obtained by rotating 180 degrees through another drive sleeve; the synchronous drive mechanism includes: Two drive shafts are rotatably mounted on a fixed frame. The two drive shafts are spaced apart along the axial direction, and each of the two drive shafts has a driven bevel gear at the end closest to each other. The driving bevel gear is rotatably mounted on the fixed frame and simultaneously meshes with two driven bevel gears. The input shaft is connected to the drive bevel gear and can be connected to a manual rotary input or an electrically controlled rotary input. Two first transmission wheels are respectively mounted on two transmission shafts; Two second transmission wheels are respectively mounted on two drive sleeves, and the two second transmission wheels are respectively connected to the two first transmission wheels.

[0013] In the above technical solution, furthermore, both first transmission wheels and both second transmission wheels are sprockets, and the sprocket on a transmission shaft is connected to the sprocket on a drive sleeve through a transmission chain.

[0014] In the above technical solution, a connecting screw hole is provided on the outer wall of the drive rod, and a connecting thread is provided on the end of the transmission pin near the drive rod. The end of the transmission pin near the drive rod extends into the receiving groove and is threadedly connected to the connecting screw hole.

[0015] This invention also discloses a method of using the aforementioned grinding machine, comprising the following steps: Debugging steps: Start the linear drive mechanism to move the worktable magnetic table to the fixed frame. Roughly place the workpiece of a certain specification to be processed on the axis of the worktable magnetic table. Connect the manual rotary input to the input shaft. The operator manually drives the active bevel gear to rotate forward, indirectly driving the two sets of positioning parts to approach the workpiece quickly and then slowly, so that the two sets of positioning parts abut against the two side walls of the workpiece. Define the angle of the active bevel gear at this time as the positioning angle. Then manually drive the active bevel gear to rotate in the opposite direction at a suitable angle, indirectly driving the two sets of positioning parts to move away from the workpiece slowly and then quickly, leaving a suitable width between the two sets of positioning parts for the workpiece to be picked up and put down. Define the angle of the active bevel gear rotating in the opposite direction as the retraction angle. Next, connect the electric rotary input to the input shaft and set the forward and reverse rotation angles of the electric rotary input as the retraction angles. Material feeding step: Roughly place the workpiece of the same specifications as in the debugging step on the axis of the magnetic table of the workbench to complete the material feeding step; Positioning steps: Start the electric rotary input to drive the active bevel gear to rotate clockwise to the positioning angle, which indirectly drives the two sets of positioning components to center and position the workpiece. After positioning is completed, power on the magnetic table to hold the workpiece, and then start the electric rotary input to drive the active bevel gear to rotate counterclockwise to the retraction angle to complete the positioning step. Processing steps: Start the top surface grinding component on the first gantry and the two side surface grinding components on the second gantry. Start the linear drive mechanism to drive the worktable magnetic table to move to the other end of the base. During this process, the top surface grinding component and the two side surface grinding components grind the top surface and the two sides of the workpiece respectively. After the worktable magnetic table moves to the other end of the base, the linear drive mechanism drives the worktable magnetic table to move towards the fixed frame. After the worktable magnetic table moves to the fixed frame, it stops moving, and the processing steps are completed. Material change steps: After the processing steps are completed, the power is turned off to the magnetic table to release the workpiece. The worker removes the processed workpiece and repeats the material loading step, positioning step, and processing step in sequence.

[0016] The beneficial effects of this invention are: 1. By setting a fixed frame at one end of the base and setting two sets of positioning components that can move closer or further away from each other synchronously on the fixed frame, the workpiece is actively centered and positioned before the worktable magnetic table adsorbs the workpiece, so that the workpiece can be accurately positioned at the machining reference position. Compared with the existing technology that relies on passive centering during the grinding process, the present invention achieves decoupling between positioning and grinding process, resulting in higher positioning accuracy and better reliability.

[0017] 2. After the positioning component is positioned, it can be driven away from the workpiece by reverse drive and no longer contact the workpiece surface. Compared with the existing technology where the centering guide mechanism is always in contact with the workpiece surface during grinding, the present invention avoids the frictional influence of the positioning structure on the workpiece surface and also avoids interference with the grinding process, which is conducive to improving the grinding quality.

[0018] 3. By designing the timing coordination of the fast drive groove and the slow drive groove in the centering drive mechanism, a motion mode is achieved in which the positioning part approaches the workpiece at a fast speed followed by a slow speed. The fast mode is used when the positioning part needs to complete a long idle stroke, and the slow mode is switched when the positioning part approaches the workpiece and needs to be precisely aligned. This ensures both overall work efficiency and centering accuracy, overcoming the time-consuming and labor-intensive problem of manual coarse positioning in existing technologies. At the same time, because the positioning part moves at a slower speed in the last segment of its approach to the workpiece, the operator has more time to stop the machine if an abnormality is detected, thus improving the safety of the processing.

[0019] 4. The synchronous drive mechanism adopts a structure in which the active bevel gear simultaneously meshes with two driven bevel gears, realizing the synchronous drive of two sets of positioning components to move symmetrically with a single power input. This simplifies the transmission structure, reduces the requirements for the control system, and ensures the synchronicity and symmetry of the movement of the two sets of positioning components, thus guaranteeing the consistency of the centering accuracy.

[0020] 5. The positioning component adopts a structure in which multiple positioning blocks are distributed at intervals and connected by a linkage plate, which can provide multi-point support and positioning for long linear guide rail workpieces, effectively preventing bending deformation of the workpiece during the positioning process and improving the positioning stability and accuracy of long workpieces.

[0021] 6. The present invention provides a method for using a grinding machine, which, by calibrating the positioning angle and retraction angle during the debugging step, only requires performing the cycle of feeding, positioning, processing, and changing materials in subsequent batch processing, thereby realizing semi-automatic operation, reducing the difficulty of operation and labor intensity, and improving the efficiency of batch processing. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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.

[0023] Figure 1 This is a three-dimensional structural diagram of the grinding machine of the present invention, in which a workpiece is placed on the magnetic table of the worktable.

[0024] Figure 2 This is a three-dimensional structural diagram of the grinding machine of the present invention located at the fixed frame, in which a workpiece is placed on the magnetic table of the worktable.

[0025] Figure 3 This is a three-dimensional structural diagram of the grinding machine of the present invention located at the fixed frame. The workpiece is not placed on the magnetic table of the worktable in the figure.

[0026] Figure 4 This is a side view of the grinding machine of the present invention located at the fixed frame.

[0027] Figure 5 This is a three-dimensional structural diagram of the centering drive mechanism in this invention.

[0028] Figure 6 This is a schematic diagram of the front view structure of the centering drive mechanism in this invention.

[0029] Figure 7 This is a three-dimensional structural diagram of the drive sleeve and drive rod in the separated state in this invention.

[0030] The markings in the diagram are as follows: 1. Base; 2. Magnetic worktable; 3. Linear drive mechanism; 4. First gantry frame; 5. Top surface grinding component; 6. Second gantry frame; 7. Side grinding component; 8. Workpiece; 9. Fixing frame; 10. Positioning component; 1001. Linkage plate; 11. Centering drive mechanism; 1201. Sliding bar; 1202. Sliding groove; 13. Drive sleeve; 1301. Receiving groove; 1302. Fast drive groove; 1303. Slow drive groove; 14. Drive rod; 15. Transmission pin; 16. Synchronous drive mechanism; 1601. Transmission shaft; 1602. Driven bevel gear; 1603. Driving bevel gear; 1604. Input shaft; 1605. First transmission wheel; 1606. Second transmission wheel; Detailed Implementation

[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments of the invention. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0033] Example 1

[0034] like Figures 1 to 4 As shown, this embodiment provides a high-efficiency grinding machine for grinding the surface of linear guide rails, including a base 1, a worktable magnetic table 2, a linear drive mechanism 3, a first gantry 4, a second gantry 6, a fixed frame 9, two sets of positioning components 10, and a centering drive mechanism 11.

[0035] The base 1 serves as the supporting foundation for the entire grinding machine. It is made of high-strength cast iron material and has sufficient rigidity and stability. The upper surface of the base 1 extends along its own length. The worktable magnetic table 2 is located above the base 1. The worktable magnetic table 2 is an electromagnetic chuck structure that can attract or release the ferromagnetic workpiece 8 by switching the power on and off.

[0036] The worktable magnetic table 2 can slide on the base 1 along its own length direction. The linear drive mechanism 3 is used to drive the worktable magnetic table 2 to perform reciprocating linear motion. The linear drive mechanism 3 can adopt common linear drive forms such as screw and nut transmission mechanism, linear motor or hydraulic cylinder.

[0037] The first gantry 4 and the second gantry 6 are both fixedly installed in the middle of the base 1 and are distributed at intervals along the length of the base 1. The first gantry 4 and the second gantry 6 are both located on the moving trajectory of the worktable magnetic table 2, that is, the worktable magnetic table 2 can pass through the space below the first gantry 4 and the second gantry 6 in turn during the reciprocating motion.

[0038] The first gantry frame 4 is equipped with a top surface grinding component 5, which is located above the magnetic table 2 of the worktable and is used to grind the top surface of the workpiece 8. The top surface grinding component 5 can adopt a grinding wheel spindle structure with the grinding wheel arranged horizontally. The first gantry frame 4 is also equipped with a drive mechanism to drive the top surface grinding component 5 to move in the horizontal and vertical directions, so as to adjust the position of the top surface grinding component 5 to accommodate workpieces 8 of different specifications.

[0039] The second gantry frame 6 is equipped with two sets of side grinding components 7, which are symmetrically arranged relative to the axis of the magnetic worktable 2. Each set of side grinding components 7 is located above and to the side of the magnetic worktable 2, forming a space between the two sets of side grinding components 7 for the workpiece 8 to pass through. The side grinding components 7 can also adopt a grinding wheel spindle structure, with the grinding wheel arranged vertically. The second gantry frame 6 is also equipped with a drive mechanism to move the two sets of side grinding components 7 in the horizontal and vertical directions, so as to adjust the spacing and height position between the two sets of side grinding components 7 to accommodate workpieces 8 of different specifications.

[0040] The fixing frame 9 is set at one end of the base 1. Specifically, the fixing frame 9 is located at the starting or ending position of the moving trajectory of the worktable magnetic table 2. The fixing frame 9 is used to install the positioning component 10 and the centering drive mechanism 11.

[0041] Two sets of positioning elements 10 are arranged symmetrically relative to the axis of the worktable magnetic table 2, that is, one set of positioning elements 10 is located on one side of the axis of the worktable magnetic table 2, and the other set of positioning elements 10 is located on the other side of the axis. Both sets of positioning elements 10 are slidably connected to the fixed frame 9, and the sliding direction is the width direction of the worktable magnetic table 2. A space for placing the workpiece 8 is formed between the two sets of positioning elements 10. When the worktable magnetic table 2 moves to the position of the fixed frame 9, the workpiece 8 is located in the space between the two sets of positioning elements 10.

[0042] like Figure 2 and Figure 3 As shown, each group of positioning components 10 includes at least two positioning blocks spaced apart along the length of the worktable magnetic table 2. In this embodiment, each group of positioning components 10 includes two positioning blocks. The two positioning blocks in the same group are fixedly connected by a linkage plate 1001, so that multiple positioning blocks in the same group can move synchronously. The side of the positioning block facing the workpiece 8 is provided with an abutment surface that contacts the side wall of the workpiece 8. The abutment surface is preferably a plane.

[0043] like Figure 3 and Figure 4 As shown, each set of positioning components 10 has a sliding bar 1201 at both ends. The sliding bar 1201 extends along the width direction of the worktable magnetic table 2. The fixed frame 9 is provided with a corresponding sliding groove 1202. The extension direction of the sliding groove 1202 is also the width direction of the worktable magnetic table 2. Each sliding bar 1201 is slidably disposed in the corresponding sliding groove 1202 to guide the movement of the positioning component 10.

[0044] The centering drive mechanism 11 is mounted on the fixed frame 9 and is used to drive the two sets of positioning components 10 to move closer or further apart synchronously. When the two sets of positioning components 10 move closer to each other, the positioning blocks on the two sets of positioning components 10 abut against the two side walls of the workpiece 8 respectively, pushing the workpiece 8 to move in the axial direction of the worktable magnetic table 2, and finally positioning the workpiece 8 in the center position.

[0045] The following combination Figures 5 to 7 The specific structure of the centering drive mechanism 11 in this embodiment will be described in detail.

[0046] The centering drive mechanism 11 includes two drive sleeves 13, two drive rods 14, two transmission pins 15, and a synchronous drive mechanism 16.

[0047] Both drive sleeves 13 are cylindrical structures. The two drive sleeves 13 are symmetrically arranged on both sides of the fixed frame 9 with respect to the axis of the worktable magnetic table 2. The two drive sleeves 13 are coaxially distributed, that is, the axes of the two drive sleeves 13 are on the same straight line. Both drive sleeves 13 are rotatably mounted on the fixed frame 9 through bearings and can rotate around their own axes.

[0048] Each of the two drive sleeves 13 has a receiving groove 1301 at one end that is close to each other. The receiving groove 1301 is a cylindrical blind hole that extends axially inward from the end face of the drive sleeve 13. The inner wall of the receiving groove 1301 is a smooth cylindrical surface.

[0049] Two drive sleeves 13 have interconnected fast drive grooves 1302 and slow drive grooves 1303 sequentially formed along the axial direction on their outer walls. Both fast drive grooves 1302 and slow drive grooves 1303 are elongated grooves that penetrate the wall thickness of the drive sleeve 13 and are connected to the receiving groove 1301. The angle between the extended line of the fast drive groove 1302 and the axis of the drive sleeve 13 is a first angle, and the angle between the extended line of the slow drive groove 1303 and the axis of the drive sleeve 13 is a second angle, with the first angle being smaller than the second angle. In other words, the fast drive groove 1302 is relatively flat relative to the axis of the drive sleeve 13, while the slow drive groove 1303 is relatively inclined relative to the axis of the drive sleeve 13, and the fast drive groove 1302 and the slow drive groove 1303 transition smoothly at the connection point.

[0050] The structures of the two drive sleeves 13 are symmetrical about the axis of the worktable magnetic stage 2, meaning that one drive sleeve 13 can be obtained by rotating the other drive sleeve 13 by 180 degrees. This symmetrical design ensures that when the two drive sleeves 13 rotate synchronously, the two drive rods 14 can move closer or further away from each other synchronously.

[0051] Both drive rods 14 are cylindrical rods. One end of each drive rod 14 is axially slidably disposed in two receiving grooves 1301. The outer diameter of the drive rod 14 is adapted to the inner diameter of the receiving groove 1301, so that the drive rod 14 can slide axially in the receiving groove 1301 without radial wobbling. The other end of each drive rod 14 is fixedly connected to two sets of positioning members 10. Specifically, the end of the drive rod 14 extending out of the receiving groove 1301 is fixedly connected to the linkage plate 1001.

[0052] Two drive pins 15 are slidably disposed in the fast drive grooves 1302 or slow drive grooves 1303 on the two drive sleeves 13, respectively. The drive pins 15 are cylindrical pins, the diameter of which is adapted to the width of the fast drive grooves 1302 and slow drive grooves 1303. The drive pins 15 can only slide along the length direction of the fast drive grooves 1302 in the fast drive grooves 1302, and cannot move along the width direction of the grooves. Similarly, the drive pins 15 can only slide along the length direction of the slow drive grooves 1303 in the slow drive grooves 1303. The drive pins 15 can slide between the fast drive grooves 1302 and slow drive grooves 1303. Of course, since the drive pins 15 are cylindrical, they can rotate relative to the drive sleeves 13 in the fast drive grooves 1302 and slow drive grooves 1303.

[0053] One end of the transmission pin 15 near the drive rod 14 extends into the receiving groove 1301 and is connected to the drive rod 14. In this embodiment, a connecting screw hole is provided on the outer wall of the drive rod 14 near the transmission pin 15, and a connecting thread is provided on one end of the transmission pin 15 near the drive rod 14. The transmission pin 15 is fixed to the drive rod 14 by the threaded connection.

[0054] When the drive sleeve 13 rotates, the groove wall of the fast drive groove 1302 or the slow drive groove 1303 applies a thrust to the transmission pin 15. Since the drive groove is inclined relative to the axis of the drive sleeve 13, the transmission pin 15, while sliding along the drive groove, also generates a component motion along the axial direction of the drive sleeve 13, thereby driving the drive rod 14 to move axially. Because the included angle of the fast drive groove 1302 is smaller than the included angle of the slow drive groove 1303, when the transmission pin 15 slides a unit length in the fast drive groove 1302, the axial displacement of the drive rod 14 is larger, that is, the positioning member 10 moves faster; when the transmission pin 15 slides a unit length in the slow drive groove 1303, the axial displacement of the drive rod 14 is smaller, that is, the positioning member 10 moves slower.

[0055] The synchronous drive mechanism 16 is used to drive the two drive sleeves 13 to rotate synchronously. The synchronous drive mechanism 16 includes two drive shafts 1601, a drive bevel gear 1603, an input shaft 1604, two first drive wheels 1605 and two second drive wheels 1606.

[0056] Both drive shafts 1601 are rotatably mounted on the fixed frame 9 via bearings. The two drive shafts 1601 are distributed axially at intervals, that is, one drive shaft 1601 is located near one drive sleeve 13, and the other drive shaft 1601 is located near another drive sleeve 13. Both drive shafts 1601 are provided with driven bevel gears 1602 at their respective ends, and the two driven bevel gears 1602 are arranged coaxially opposite each other.

[0057] The driving bevel gear 1603 is rotatably mounted on the fixed frame 9 via a bearing. The axis of the driving bevel gear 1603 is perpendicular to the axis of the driven bevel gear 1602. The driving bevel gear 1603 is simultaneously meshed with two driven bevel gears 1602. When the driving bevel gear 1603 rotates, the two driven bevel gears 1602 rotate synchronously in opposite directions.

[0058] The input shaft 1604 is fixedly connected to the drive bevel gear 1603. One end of the input shaft 1604 extending outside the fixed frame 9 can be connected to a manual rotary input device (such as a handwheel) or an electrically controlled rotary input device (such as a servo motor). The operator can drive the drive bevel gear 1603 to rotate by rotating the input shaft 1604.

[0059] Two first transmission wheels 1605 are respectively mounted on two transmission shafts 1601 and rotate synchronously with the transmission shafts 1601. Two second transmission wheels 1606 are respectively mounted on two drive sleeves 13 and rotate synchronously with the drive sleeves 13. The two second transmission wheels 1606 are respectively connected to the two first transmission wheels 1605 to transmit power from the transmission shafts 1601 to the drive sleeves 13.

[0060] In this embodiment, there are multiple ways to connect the first transmission wheel 1605 and the second transmission wheel 1606.

[0061] The first type of transmission connection: both first transmission wheels 1605 and two second transmission wheels 1606 are sprockets. The sprocket on one transmission shaft 1601 is connected to the sprocket on the corresponding drive sleeve 13 through a transmission chain. The two transmission chains are respectively set on both sides of the fixed frame 9 and do not interfere with each other. Through the chain transmission method, even if there is a certain distance and angular deviation between the transmission shaft 1601 and the drive sleeve 13, the power can be reliably transmitted.

[0062] The second type of transmission connection: both first transmission wheels 1605 and two second transmission wheels 1606 are gears. The gear on one transmission shaft 1601 is directly meshed with the gear on the corresponding drive sleeve 13. This transmission method transmits power more directly, but it has high requirements for the position design of the drive sleeve 13 and the transmission shaft 1601.

[0063] When the operator drives the input shaft 1604 to rotate, the driving bevel gear 1603 rotates, which drives the two driven bevel gears 1602 to rotate synchronously in opposite directions, and in turn drives the two transmission shafts 1601 to rotate synchronously in opposite directions. The two transmission shafts 1601 drive the two drive sleeves 13 to rotate synchronously in opposite directions through chain drive or gear drive. Since the two drive sleeves 13 are arranged in a mirror symmetrical manner and the two drive sleeves 13 rotate in opposite directions, the two transmission pins 15 drive the two drive rods 14 to move synchronously closer to each other or further away from each other along the axial direction, thereby realizing the synchronous symmetrical movement of the two sets of positioning parts 10.

[0064] Example 2

[0065] This embodiment provides a method for using the above-mentioned grinding machine, including debugging steps, feeding steps, positioning steps, machining steps, and material changing steps. The following provides a detailed description of each step.

[0066] Debugging steps: First, start the linear drive mechanism 3 to move the worktable magnetic table 2 to the fixed frame 9, and roughly place the workpiece 8 of a certain specification to be processed on the axis of the worktable magnetic table 2. Connect the manual rotary input to the input shaft 1604, for example, install a handwheel. The worker manually rotates the handwheel to drive the driving bevel gear 1603 to rotate forward. The driving bevel gear 1603 drives the two drive sleeves 13 to rotate synchronously in opposite directions through the driven bevel gear 1602, the transmission shaft 1601, and the chain drive mechanism. The fast drive groove 1302 and the slow drive groove 1303 on the two drive sleeves 13 respectively drive the two transmission pins 15 to slide, thereby driving the two drive rods 14 to move closer to each other. Two sets of positioning components 10 approach the workpiece 8 quickly and then slowly until they abut against the two side walls of the workpiece 8. At this point, the workpiece 8 is centered and positioned. The angle of the driving bevel gear 1603 at this point is recorded and defined as the positioning angle. Then, the driving bevel gear 1603 is manually driven to rotate in the opposite direction by a certain angle, causing the two sets of positioning components 10 to move away from the workpiece 8 slowly and then quickly, until a suitable width is left between the two sets of positioning components 10 for the workpiece 8 to be picked up and put down. The angle of the reverse rotation of the driving bevel gear 1603 is recorded and defined as the retraction angle. Next, the workpiece 8 is removed, and an electronically controlled rotary input, such as a servo motor or a stepper motor, is connected to the input shaft 1604. The forward rotation angle of the electronically controlled rotary input is set as the positioning angle, and the reverse rotation angle is set as the retraction angle. The debugging steps are now complete.

[0067] Material feeding step: Roughly place the workpiece 8 of the same specifications as in the debugging step on the axis of the worktable magnetic table 2. The worktable magnetic table 2 is in a de-energized state at this time, and the workpiece 8 is not attracted. It can be slid and adjusted on the surface of the worktable magnetic table 2.

[0068] Positioning steps: Start the electronically controlled rotary input drive to rotate the active bevel gear 1603 clockwise to the positioning angle. The active bevel gear 1603 drives the two drive sleeves 13 to rotate synchronously in opposite directions through the transmission chain. The two sets of positioning components 10 move towards the workpiece 8 quickly and then slowly. Finally, the positioning blocks of the two sets of positioning components 10 abut against the two side walls of the workpiece 8, pushing the workpiece 8 to the center position of the worktable magnetic table 2, completing the centering and positioning. After positioning, power is supplied to the worktable magnetic table 2, and the worktable magnetic table 2 generates magnetic force to firmly attract the workpiece 8 onto the worktable magnetic table 2. Then, start the electronically controlled rotary input drive to rotate the active bevel gear 1603 counterclockwise to the retraction angle. The two sets of positioning components 10 move away from the workpiece 8 slowly and then quickly, leaving space for subsequent processing. At this time, the workpiece 8 has been accurately centered and firmly attracted onto the worktable magnetic table 2.

[0069] Processing steps: Start the top surface grinding component 5 on the first gantry 4 and the two side surface grinding components 7 on the second gantry 6. Each grinding component starts to rotate. Start the linear drive mechanism 3 to drive the worktable magnetic table 2 to move to the other end of the base 1. The worktable magnetic table 2 drives the workpiece 8 to pass through the first gantry 4 and the second gantry 6 in sequence. When the workpiece 8 passes through the first gantry 4, the top surface grinding component 5 grinds the top surface of the workpiece 8. When the workpiece 8 passes through the second gantry 6, the two sets of side surface grinding components 7 grind the two sides of the workpiece 8 at the same time. Since the workpiece 8 has been accurately centered in the positioning step, its processing reference position is accurate, and the positional accuracy of each surface is high after grinding. After the worktable magnetic table 2 moves to the other end of the base 1, the linear drive mechanism 3 drives the worktable magnetic table 2 back to the fixed frame 9. The worktable magnetic table 2 stops moving after moving to the fixed frame 9, completing the processing steps.

[0070] Material changing steps: After the processing steps are completed, the power is turned off to the magnetic table 2, the magnetic table 2 releases the workpiece 8, and the worker removes the processed workpiece 8 from the magnetic table 2. Then the feeding step, positioning step and processing step are repeated in sequence to process the next workpiece 8.

[0071] It should be noted that when batch processing workpieces 8 of the same specification, the debugging steps only need to be performed once before the first processing. Subsequent processing only requires repeating the feeding step, positioning step, processing step, and material change step. When changing to workpieces 8 of different specifications, the debugging steps need to be performed again, and the positioning angle and retraction angle need to be recalibrated.

[0072] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of the present invention can be combined with each other. The present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of the present invention.

Claims

1. A high-efficiency grinding machine for grinding the surface of linear guideways, comprising: A base (1) is provided with a worktable magnetic table (2). The worktable magnetic table (2) can attract or release the workpiece (8) by switching on and off the power. The worktable magnetic table (2) can move on the base (1) along its own length. A linear drive mechanism (3) is used to drive the worktable magnetic table (2) to perform reciprocating linear motion on the base (1); The first gantry (4) is located in the middle of the base (1). The first gantry (4) is located on the moving track of the worktable magnetic table (2). The first gantry (4) is provided with a top surface grinding part (5), which is used to grind the top surface of the workpiece (8). The second gantry (6) is located in the middle of the base (1) and is spaced apart from the first gantry (4). The second gantry (6) is located on the moving trajectory of the worktable magnetic table (2). The second gantry (6) is provided with two sets of side grinding parts (7) arranged symmetrically with respect to the axis of the worktable magnetic table (2). The two sets of side grinding parts (7) are used to grind the two sides of the workpiece (8) respectively. Its characteristic is that it further includes: A fixing frame (9) is provided at one end of the base (1) and the fixing frame (9) is located on the moving trajectory of the worktable magnetic table (2); Two sets of positioning components (10) are arranged symmetrically with respect to the axis of the worktable magnetic table (2). Both sets of positioning components (10) are slidably connected to the fixing frame (9) along the width direction of the worktable magnetic table (2). A space for placing the workpiece (8) is formed between the two sets of positioning components (10). A centering drive mechanism (11) is provided on the fixed frame (9). The centering drive mechanism (11) is used to drive the two sets of positioning members (10) to move closer to each other or move further away from each other synchronously. Among them, the two sets of positioning members (10) can abut against the two side walls of the workpiece (8) respectively during the process of approaching each other, thereby centering and positioning the workpiece (8).

2. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 1, characterized in that: Each group of positioning components (10) includes at least two positioning blocks spaced apart along the length of the worktable magnetic table (2), and two adjacent positioning blocks in each group of positioning components (10) are connected by a linkage plate (1001).

3. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 2, characterized in that: Each of the positioning components (10) is provided with a sliding bar (1201) at both ends, and the fixing frame (9) is provided with a sliding groove (1202) for each sliding bar (1201) to slide along the width direction of the worktable magnetic table (2).

4. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 1, 2, or 3, characterized in that, The centering drive mechanism (11) includes: Two drive sleeves (13) are symmetrically arranged on both sides of the fixed frame (9) with respect to the axis of the worktable magnetic table (2). The two drive sleeves (13) are coaxially distributed and can rotate on the fixed frame (9) along their own axis. Each of the two drive sleeves (13) has a receiving groove (1301) at one end close to the other. The outer walls of the two drive sleeves (13) are sequentially provided with a fast drive groove (1302) and a slow drive groove (1303) that are interconnected along the axial direction. The fast drive groove (1302) and the slow drive groove (1303) are both connected to the receiving groove (1301). The angle between the extension line of the length direction of the fast drive groove (1302) and the axis of the drive sleeve (13) is smaller than the angle between the extension line of the length direction of the slow drive groove (1303) and the axis of the drive sleeve (13). Two drive rods (14), one end of each drive rod (14) is slidably disposed in the two receiving grooves (1301) along the axial direction, and the other end of each drive rod (14) is connected to the two sets of positioning members (10). Two drive pins (15) are slidably disposed in the fast drive groove (1302) or the slow drive groove (1303) on the two drive sleeves (13), respectively. The two drive pins (15) are respectively connected to the two drive rods (14). The drive pins (15) can only slide along the length direction of the fast drive groove (1302) in the fast drive groove (1302), and the drive pins (15) can only slide along the length direction of the slow drive groove (1303) in the slow drive groove (1303). The drive pins (15) can slide between the fast drive groove (1302) and the slow drive groove (1303). The synchronous drive mechanism (16) can drive the two drive sleeves (13) to rotate synchronously, thereby causing the fast drive groove (1302) or the slow drive groove (1303) on the two drive sleeves (13) to drive the two transmission pins (15) to slide, thereby causing the two transmission pins (15) to drive the two drive rods (14) to move closer to each other or further away from each other.

5. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 4, characterized in that: One of the drive sleeves (13) can be obtained by rotating the other drive sleeve (13) 180 degrees; the synchronous drive mechanism (16) includes: Two drive shafts (1601) are rotatably mounted on the fixed frame (9). The two drive shafts (1601) are spaced apart along the axial direction. A driven bevel gear (1602) is provided at the end of each drive shaft (1601) that is close to each other. The active bevel gear (1603) is rotatably mounted on the fixed frame (9) and simultaneously meshes with two driven bevel gears (1602). An input shaft (1604) is connected to the drive bevel gear (1603), and the input shaft (1604) can be connected to a manual rotary input or an electrically controlled rotary input; Two first transmission wheels (1605) are respectively mounted on the two transmission shafts (1601); Two second transmission wheels (1606) are respectively disposed on the two drive sleeves (13), and the two second transmission wheels (1606) are respectively connected to the two first transmission wheels (1605).

6. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 5, characterized in that: Both first drive wheels (1605) and both second drive wheels (1606) are sprockets, and the sprocket on one drive shaft (1601) is connected to the sprocket on one drive sleeve (13) via a drive chain.

7. The high-efficiency grinding machine for grinding the surface of linear guideways according to claim 4, characterized in that: The outer wall of the drive rod (14) is provided with a connecting screw hole, and the end of the transmission pin (15) near the drive rod (14) is provided with a connecting thread. The end of the transmission pin (15) near the drive rod (14) extends into the receiving groove (1301) and is threadedly connected to the connecting screw hole.

8. A method of using a grinding machine, applicable to the high-efficiency grinding machine for grinding the surface of linear guideways as described in claim 5, characterized in that, Includes the following steps: Debugging steps: Start the linear drive mechanism (3) to drive the worktable magnetic table (2) to move to the fixed frame (9). Roughly place the workpiece (8) of a certain specification to be processed on the axis of the worktable magnetic table (2). Connect the manual rotation input to the input shaft (1604). The worker manually drives the active bevel gear (1603) to rotate in the forward direction, which indirectly drives the two sets of positioning parts (10) to approach the workpiece (8) first quickly and then slowly, so that the two sets of positioning parts (10) abut against the two side walls of the workpiece (8) respectively. At this time, the active bevel gear (1603) is rotated in the forward direction. The angle of the bevel gear (1603) is defined as the positioning angle. Then, the active bevel gear (1603) is manually driven to rotate in the opposite direction by a suitable angle, which indirectly drives the two sets of positioning parts (10) to move away from the workpiece (8) slowly and then quickly, so that a suitable width is left between the two sets of positioning parts (10) for the workpiece (8) to be picked up and put in. The angle of the active bevel gear (1603) rotating in the opposite direction is defined as the retraction angle. Then, an electric rotary input is connected to the input shaft (1604), and the forward and reverse rotation angles of the electric rotary input are set as the retraction angles. Material feeding step: Roughly place the workpiece (8) of the same specifications as in the debugging step on the axis of the magnetic table (2) of the workbench to complete the material feeding step; Positioning steps: Start the electric rotary input drive to rotate the active bevel gear (1603) to the positioning angle, indirectly drive the two sets of positioning parts (10) to center and position the workpiece (8). After positioning, energize the worktable magnetic table (2) to hold the workpiece (8), and then start the electric rotary input drive to rotate the active bevel gear (1603) to the retraction angle to complete the positioning steps. Processing steps: Start the top surface grinding part (5) on the first gantry (4) and the two side grinding parts (7) on the second gantry (6). Start the linear drive mechanism (3) to drive the worktable magnetic table (2) to move to the other end of the base (1). During this process, the top surface grinding part (5) and the two side grinding parts (7) grind the top surface and two sides of the workpiece (8) respectively. After the worktable magnetic table (2) moves to the other end of the base (1), the linear drive mechanism (3) drives the worktable magnetic table (2) to move towards the fixed frame (9). After the worktable magnetic table (2) moves to the fixed frame (9), it stops moving, and the processing steps are completed. Material change steps: After the processing steps are completed, the worktable magnetic table (2) is de-energized to release the workpiece (8). The worker removes the processed workpiece (8) and repeats the material release step, positioning step and processing step in sequence.

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