Workpiece grinding equipment

Abstract

The present invention discloses a workpiece grinding device, which includes a transverse feeding mechanism, a longitudinal feeding mechanism, a belt grinder provided on the transverse feeding mechanism, and a clamping mechanism provided on the longitudinal feeding mechanism; the clamping mechanism includes a rotatable substrate, a first clamping seat and a second clamping seat provided on the substrate, and the first clamping seat and the second clamping seat can move towards each other; a rotatable first fixture is installed on the first clamping seat, and a second fixture that can cooperate with the first fixture to rotate is provided on the second clamping seat, and the first fixture and the second fixture respectively clamp the axial two ends of the workpiece; the transverse feeding mechanism drives the belt grinder to move transversely, and the longitudinal feeding mechanism drives the clamping mechanism to move in a direction perpendicular to the transverse feeding mechanism. In the present invention, the workpiece is clamped by the first clamping seat and the second clamping seat moving towards each other, and the loading and positioning operations are convenient; the belt grinder and the clamping mechanism are driven to move by the transverse and longitudinal feeding mechanisms to perform all-round grinding on the workpiece, and the production efficiency is high.

Description

Technical Field

[0001] The present invention relates to the technical field of cable accessory processing, and particularly to a workpiece grinding device.

Background Art

[0002] At present, the stress cone adopted by GIS terminals is made of rubber and is produced by die-casting injection molding. The workpieces produced in this way will inevitably have surface mold joint lines and rubber injection nozzles at both ends, which need to be removed and ground. The conventional treatment method is to use a lathe for cutting and grinding to ensure the tolerance dimensions of the products. However, through machining by a lathe, the processing cycle is long. Especially for workpieces with arc surfaces, multiple clamping and positioning are required, and high professional skills of employees are required, resulting in high production costs. In view of this, it is necessary to provide a workpiece grinding device to overcome the above defects.

Summary of the Invention

[0003] The purpose of the present invention is to provide a workpiece grinding device, which is convenient for clamping and positioning, has high grinding consistency and high production efficiency.

[0004] To achieve the above purpose, the present invention provides a workpiece grinding device, including a transverse feeding mechanism, a longitudinal feeding mechanism, a belt grinder arranged on the transverse feeding mechanism, and a clamping mechanism arranged on the longitudinal feeding mechanism; the clamping mechanism includes a rotatable substrate, a first clamping seat and a second clamping seat arranged on the substrate, and the first clamping seat and the second clamping seat can move towards each other; a rotatable first clamp is installed on the first clamping seat, and a second clamp that can cooperate with the first clamp to rotate is arranged on the second clamping seat. The first clamp and the second clamp respectively clamp the axial two ends of the workpiece; the transverse feeding mechanism drives the belt grinder to move horizontally, and the longitudinal feeding mechanism drives the clamping mechanism to move in a direction perpendicular to the transverse feeding mechanism.

[0005] In a preferred embodiment, the first clamping seat includes a vertically arranged first clamping plate and a rotating assembly arranged on the first clamping plate to drive the first clamp to rotate. The rotating assembly includes a driving gear, a driven gear meshing with the driving gear, and a rotation driving member for driving the driving gear to rotate. The first clamp is fixedly connected with the driven gear; the second clamping seat further includes a second clamping plate, and the second clamp is movably installed on the second clamping plate.

[0006] In a preferred embodiment, a first mounting hole is formed in the driven gear, the first clamp is fixed in the first mounting hole, a second mounting hole is formed in the second clamping plate, and the second clamp is installed in the second mounting hole through a bearing.

[0007] In a preferred embodiment, a third clamping plate is further provided on the first clamping seat. The third clamping plate is attached to the first clamping plate, and a third fixture having the same structure as the second fixture is provided on the third clamping plate. A third mounting hole is formed in the third clamping plate, and the third fixture is mounted in the third mounting hole through a bearing.

[0008] In a preferred embodiment, the meshing portion of the driven gear and the driving gear is sealed within the first clamping plate, and an oil injection hole is formed in the first clamping plate.

[0009] In a preferred embodiment, the first fixture and the second fixture are in an annular structure.

[0010] In a preferred embodiment, the clamping mechanism further includes a motion driving assembly provided on the substrate. The motion driving assembly includes a driving cylinder, a first transmission rack, a second transmission rack, and a transmission gear. The first transmission rack is fixedly connected to the first clamping seat, the second transmission rack is fixedly connected to the second clamping seat, the transmission gear is respectively meshed with the first transmission rack and the second transmission rack, and the driving cylinder drives the second transmission rack to move.

[0011] In a preferred embodiment, the longitudinal feeding mechanism includes a longitudinal lead screw and a longitudinal base movable along the longitudinal lead screw. The substrate is provided on the longitudinal base. A rotating shaft and a positioning cylinder for clamping the substrate are provided in the longitudinal base. The rotating shaft is fixedly connected to the substrate, a positioning hole is formed in the substrate, and the positioning cylinder can drive a plunger to extend into the positioning hole.

[0012] In a preferred embodiment, the belt sander includes a positioning frame, a driving roller, a plurality of follower rollers provided on the positioning frame, a sand belt sleeved on the driving roller and the follower rollers, and a grinding motor for driving the driving roller to rotate. A top plate mechanism for supporting the sand belt for grinding is provided on one side of the positioning frame close to the clamping mechanism.

[0013] In a preferred embodiment, the top plate mechanism includes a top plate seat, a guide rod, a top plate connected to one end of the guide rod, and a locking handle for fixing the guide rod. The guide rod passes through the top plate seat, the locking handle passes through the top plate seat and locks the guide rod, and the top plate is used for supporting the sand belt.

[0014] In a preferred embodiment, the positioning frame includes a bracket fixed on the transverse feeding mechanism, a movable frame provided on the bracket, and an angle adjusting block fixedly connected to the movable frame. A clamping groove is formed in the angle adjusting block, and a locking member slidable along the clamping groove is provided in the clamping groove. The angle adjusting block and the bracket are locked by the locking member being snapped into the clamping groove.

[0015] In a preferred embodiment, a tensioning assembly is further provided on the positioning frame. The tensioning assembly includes a guide post, a guide post seat, a slider, a connecting plate, a movable plate, and a tensioning wheel provided on the movable plate. The guide post seat is fixed on the positioning frame, the guide post is fixedly connected to the guide post seat, the slider is sleeved on the guide post, the slider and the guide post seat are connected by an elastic member, the connecting plate is fixedly connected to the slider, the movable plate is movably connected to the connecting plate, and the angle of the movable plate is adjusted by an adjusting member passing through the connecting plate and abutting against the movable plate.

[0016] In a preferred embodiment, the transverse feeding mechanism includes a transverse lead screw and a transverse base that can move along the transverse lead screw. The belt sander is fixed on the transverse base, and a dust suction pipe is provided on the transverse base. The dust suction port of the dust suction pipe is located at the lower end of the top plate mechanism.

[0017] The beneficial effects of the present invention are as follows: The first clamping seat and the second clamping seat move towards each other to drive the first clamp and the second clamp to clamp the workpiece, and the loading and positioning operation is convenient; The transverse feeding mechanism and the longitudinal feeding mechanism respectively drive the belt sander and the clamping mechanism to move, and the first clamp and the second clamp can cooperate to rotate to drive the workpiece to rotate, so that the workpiece can be polished in all directions, the production efficiency is high, and the polishing consistency is high.

[0018] In order to make the above objects, features, and advantages of the invention more obvious and understandable, the following specifically enumerates the preferred embodiments of the invention and, in conjunction with the accompanying drawings, makes the following detailed description.

Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a three-dimensional structure diagram of the workpiece grinding equipment provided by the preferred embodiment of the present invention;

[0021] Figure 2 For Figure 1 The partial structure diagram of the workpiece grinding equipment shown;

[0022] Figure 3 For Figure 2 The three-dimensional structure diagram of the clamping mechanism shown in;

[0023] Figure 4 For Figure 3 The cross-sectional view of the clamping mechanism shown in;

[0024] Figure 5 is Figure 3 a sectional view of the clamping mechanism shown in [the figure] from another angle;

[0025] Figure 6 is Figure 2 a three-dimensional structure diagram of the longitudinal feed mechanism shown in [the figure];

[0026] Figure 7 is

[0027] Figure 8 a three-dimensional structure diagram of the belt sander provided by a preferred embodiment of the present invention; Figure 7 a three-dimensional structure diagram of the belt sander shown in [the figure] from another angle;

[0028] Figure 9 is Figure 2 a three-dimensional structure diagram of the transverse feed mechanism shown in [the figure].

[0029] Explanation of the reference numerals in the drawings: workpiece grinding equipment 100, transverse feed mechanism 10, transverse lead screw 11, transverse base 12, dust suction pipe 13, dust suction port 131, second guide roller 14, second dust-proof belt 15, longitudinal feed mechanism 20, longitudinal lead screw 21, longitudinal base 22, rotating shaft 221, positioning cylinder 222, bearing sleeve 223, rotating bearing 224, first guide roller 23, first dust-proof belt 24, belt sander 30, positioning frame 31, support 311, movable frame 312, angle adjustment block 313, card slot 3131, locking member 314, driving roller 32, follower roller 33, abrasive belt 34, grinding motor 35, top plate mechanism 36, top plate seat 361, guide rod 362, top plate 363, locking handle 364, tensioning assembly 37, guide post 371, guide post seat 372, slider 373, connecting plate 374, movable plate 375, tensioning wheel 376, elastic member 377, clamping mechanism 40, substrate 41, slide rail 411, positioning hole 412, first clamping seat 42, first clamp 421, first clamping plate 422, oil injection hole 4221, rotating assembly 423, driving gear 4231, driven gear 4232, rotation driving member 4233, third clamping plate 424, second clamping seat 43, second clamp 431, second clamping plate 432, bearing 433, motion driving assembly 44, driving cylinder 441, first transmission rack 442, second transmission rack 443, transmission gear 444, limiting wheel 445, frame 50, caster 51, workpiece 200.

Detailed Description of the Invention

[0030] In order to make the objectives, technical solutions, and beneficial technical effects of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described in this specification are only for explaining the present invention and not for limiting the present invention.

[0031] Please refer to Figure 1 and Figure 2 , an embodiment of the present invention provides a workpiece grinding device 100, which includes a transverse feed mechanism 10, a longitudinal feed mechanism 20, a belt sander 30 provided on the transverse feed mechanism 10, and a clamping mechanism 40 provided on the longitudinal feed mechanism 20. In this embodiment, the workpiece grinding device 100 further includes a frame 50 for installing the transverse feed mechanism 10 and the longitudinal feed mechanism 20. A plurality of casters 51 are provided at the lower end of the frame 50 to facilitate the movement of the device.

[0032] The transverse feed mechanism 10 drives the belt sander 30 to move horizontally, and the longitudinal feed mechanism 20 drives the clamping mechanism 40 to move in a direction perpendicular to the transverse feed mechanism 10, so that the belt sander 30 and the clamping mechanism 40 can approach each other in the horizontal plane for grinding.

[0033] Specifically, please refer to Figures 3 to 5 , the clamping mechanism 40 includes a rotatable base plate 41, a first clamping seat 42 and a second clamping seat 43 provided on the base plate 41. The first clamping seat 42 and the second clamping seat 43 can move towards each other; a rotatable first clamp 421 is installed on the first clamping seat 42, and a second clamp 431 that can cooperate with the first clamp 421 to rotate is provided on the second clamping seat 43. The first clamp 421 and the second clamp 431 respectively clamp the two axial ends of the workpiece 200. It can be understood that by moving the first clamping seat 42 and the second clamping seat 43 towards each other, the first clamp 421 and the second clamp 431 are brought closer to each other to clamp the workpiece 200.

[0034] In this embodiment, the first clamp 421 and the second clamp 431 are in a ring structure, and the first clamp 421 and the second clamp 431 can be replaced according to workpieces of different specifications. In this embodiment, the workpiece 200 is a stress cone, but it is not limited thereto. In other embodiments, the workpiece 200 can also be other plastic products with a conical surface formed by injection molding.

[0035] The first clamping seat 42 includes a vertically arranged first clamping plate 422 and a rotating assembly 423 arranged on the first clamping plate 422 to drive the rotation of the first clamp 421. The rotating assembly 423 includes a driving gear 4231, a driven gear 4232 engaged with the driving gear 4231, and a rotation driving member 4233 for driving the rotation of the driving gear 4231. The first clamp 421 is fixedly connected to the driven gear 4232. The second clamping seat 43 further includes a second clamping plate 432, and the second clamp 431 is movably installed on the second clamping plate 432. As Figure 2 shown, the rotation driving member 4233 is a DC motor.

[0036] A first mounting hole is formed in the driven gear 4232, and the first clamp 421 is fixed in the first mounting hole. A second mounting hole is formed in the second clamping plate 432, and the second clamp 431 is installed in the second mounting hole through a bearing 433.

[0037] In this embodiment, a third clamping plate 424 is further provided on the first clamping seat 42. The third clamping plate 424 is attached to the first clamping plate 422, and a third clamp having the same structure as the second clamp 431 is provided on the third clamping plate 424. A third mounting hole is formed in the third clamping plate 424, and the third clamp is installed in the third mounting hole through a bearing 433. The rotation of the workpiece 200 is driven by the first clamp 421 driven by the rotation assembly 423, and the second clamp 431 and the third clamp also rotate accordingly.

[0038] Specifically, the meshing portion of the driven gear 4232 and the driving gear 4231 is sealed inside the first clamping plate 422. An oil injection hole 4221 is formed in the first clamping plate 422, which is convenient for regular lubrication and maintenance work, and at the same time protects the transmission stability of the rotation assembly 423.

[0039] The clamping mechanism 40 further includes a motion driving assembly 44 arranged on the substrate 41. The motion driving assembly 44 includes a driving cylinder 441, a first transmission rack 442, a second transmission rack 443, and a transmission gear 444. The first transmission rack 442 is fixedly connected to the first clamping seat 42, the second transmission rack 443 is fixedly connected to the second clamping seat 43, the transmission gear 444 is respectively engaged with the first transmission rack 442 and the second transmission rack 443, and the driving cylinder 441 drives the movement of the second transmission rack 443. In this embodiment, the first transmission rack 442 and the second transmission rack 443 are arranged in parallel, and a limiting wheel 445 is provided on each side of the first transmission rack 442 and the second transmission rack 443 to prevent the rack from shifting.

[0040] Furthermore, a pair of parallel slide rails 411 are provided on the substrate 41. Both the first clamping seat 42 and the second clamping seat 43 are slidably engaged with the slide rails 411, and the motion driving assembly 44 is arranged between the pair of slide rails 411 to save space.

[0041] Please refer to Figure 6 as well. The longitudinal feed mechanism 20 includes a longitudinal lead screw 21 and a longitudinal base 22 that can move along the longitudinal lead screw 21. The substrate 41 is disposed on the longitudinal base 22. A rotating shaft 221 and a positioning cylinder 222 for clamping the substrate 41 are provided inside the longitudinal base 22. The rotating shaft 221 is fixedly connected to the substrate 41. A positioning hole 412 is formed on the substrate 41. The positioning cylinder 222 can drive the plunger to extend into the positioning hole 412 to achieve an accurate positioning function. In this embodiment, the substrate 41 can be manually rotated, for example, rotated by 90 degrees, and then positioned by the positioning cylinder 222 to achieve grinding at different positions of the workpiece 200.

[0042] Specifically, a bearing sleeve 223 is provided on the longitudinal base 22. The rotating shaft 221 is installed in the bearing sleeve 223 through a rotary bearing 224 to achieve the rotation function of the rotating shaft 221. An air-electric slip ring is also mounted on one side of the longitudinal base 22 to ensure that the electric wire and the air circuit are not affected by rotation.

[0043] The longitudinal feed mechanism 20 further includes a pair of first guide rollers 23 respectively disposed at both ends of the longitudinal lead screw 21. A first dust-proof belt 24 is sleeved on the first guide rollers 23. As Figure 2 shown, the first dust-proof belt 24 is fixedly connected to the longitudinal base 22. The first dust-proof belt 24 and the longitudinal base 22 move in coordination, with good dust-proof effect and can prevent the first dust-proof belt 24 from falling off.

[0044] Please refer to Figure 7 and Figure 8 . The belt sander 30 includes a positioning frame 31, a driving roller 32, a plurality of follower rollers 33 disposed on the positioning frame 31, a sand belt 34 sleeved on the driving roller 32 and the follower rollers 33, and a grinding motor 35 for driving the driving roller 32 to rotate. A top plate mechanism 36 for supporting the sand belt 34 for grinding is provided on one side of the positioning frame 31 close to the clamping mechanism 40. By driving the driving roller 32 to rotate through the grinding motor 35, the sand belt 34 is driven to rotate to achieve a cyclic grinding function.

[0045] The top plate mechanism 36 includes a top plate seat 361, a guide rod 362, a top plate 363 connected to one end of the guide rod 362, and a locking handle 364 for fixing the guide rod 362. The guide rod 362 passes through the top plate seat 361. The locking handle 364 passes through the top plate seat 361 and locks the guide rod 362. The top plate 363 is used to support the sand belt 34. By supporting with the top plate 363, a flat grinding surface can be provided for the sand belt 34.

[0046] Specifically, the positioning frame 31 includes a bracket 311 fixed to the transverse feeding mechanism 10, a movable frame 312 disposed on the bracket 311, and an angle adjusting block 313 fixedly connected to the movable frame 312. A clamping groove 3131 is formed on the angle adjusting block 313, and a locking member 314 that can slide along the clamping groove 3131 is provided in the clamping groove 3131. The angle adjusting block 313 is locked with the bracket 311 by the locking member 314 being snapped into the clamping groove 3131. In this embodiment, the clamping groove 3131 is arc-shaped, and the grinding angle of the abrasive belt 34 can be adjusted by manually loosening the locking member 314.

[0047] A tensioning assembly 37 is further provided on the positioning frame 31. The tensioning assembly 37 includes a guide post 371, a guide post seat 372, a slider 373, a connecting plate 374, a movable plate 375, and a tensioning wheel 376 disposed on the movable plate 375. The guide post seat 372 is fixed to the positioning frame 31, the guide post 371 is fixedly connected to the guide post seat 372, the slider 373 is sleeved on the guide post 371, the slider 373 and the guide post seat 372 are connected by an elastic member 377, the connecting plate 374 is fixedly connected to the slider 373, the movable plate 375 is movably connected to the connecting plate 374, and the angle of the movable plate 375 is adjusted by an adjusting member 378 passing through the connecting plate 374 and abutting against the movable plate 375. In this embodiment, the elastic member 377 is a spring.

[0048] Please refer to Figure 9 , the transverse feeding mechanism 10 includes a transverse lead screw 11 and a transverse base 12 that can move along the transverse lead screw 11. The abrasive belt machine 30 is fixed on the transverse base 12. A dust suction pipe 13 is provided on the transverse base 12, and the dust suction port 131 of the dust suction pipe 13 is located at the lower end of the top plate mechanism 36 for collecting the dust falling off during grinding. In this embodiment, the transverse lead screw 11 is driven to rotate by a stepping motor, so that the transverse base 12 can perform a linear reciprocating motion.

[0049] The transverse feeding mechanism 10 further includes a pair of second guide rollers 14 respectively disposed at both ends of the transverse lead screw 11. A second dust-proof belt 15 is sleeved on the second guide rollers 14. As Figure 2 shown, the second dust-proof belt 15 is fixedly connected to the transverse base 12, and the second dust-proof belt 15 moves in coordination with the transverse base 12, having good dust-proof effect and can prevent the second dust-proof belt 15 from falling off.

[0050] The working principle of the present invention is as follows: First, the workpiece 200 is clamped by the clamping mechanism 40, and then the substrate 41 is manually rotated to determine the required grinding surface. The transverse feeding mechanism 10 and the longitudinal feeding mechanism 20 automatically proceed according to the equipment program to control the grinding depth of the abrasive belt machine 30 and ensure the consistency of workpiece processing.

[0051] The workpiece grinding device 100 provided by the embodiment of the present invention drives the first fixture 421 and the second fixture 431 to clamp the workpiece 200 by the opposite movement of the first clamping seat 42 and the second clamping seat 43, and the loading and positioning operation is convenient; the belt grinder 30 and the clamping mechanism 40 are respectively driven to move by the transverse feed mechanism 10 and the longitudinal feed mechanism 20, and the first fixture 421 and the second fixture 431 can be rotated in cooperation to drive the workpiece 200 to rotate, so that the workpiece 200 can be ground in all directions, and the production efficiency is high and the grinding consistency is high.

[0052] The present invention is not limited only to what is described in the specification and embodiments. Therefore, for those skilled in the art, additional advantages and modifications can be easily achieved. Thus, without departing from the spirit and scope of the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details, representative devices, and illustrated examples shown and described herein.

Claims

1. A workpiece grinding device, characterized in that, it includes a transverse feeding mechanism, a longitudinal feeding mechanism, a belt sander disposed on the transverse feeding mechanism, and a clamping mechanism disposed on the longitudinal feeding mechanism; the clamping mechanism includes a rotatable substrate, a first clamping seat, a second clamping seat and a motion driving assembly disposed on the substrate, and the first clamping seat and the second clamping seat can move towards each other; a rotatable first clamp is installed on the first clamping seat, and a second clamp that can cooperate with the first clamp to rotate is provided on the second clamping seat. The first clamp and the second clamp respectively clamp the two axial ends of the workpiece. The first clamping seat includes a vertically arranged first clamping plate and a rotating assembly disposed on the first clamping plate to drive the first clamp to rotate. The rotating assembly includes a driving gear, a driven gear meshing with the driving gear and a rotation driving member for driving the driving gear to rotate. The first clamp is fixedly connected to the driven gear; the second clamping seat further includes a second clamping plate, and the second clamp is movably installed on the second clamping plate; the motion driving assembly includes a driving cylinder, a first transmission rack, a second transmission rack and a transmission gear. The first transmission rack is fixedly connected to the first clamping seat, the second transmission rack is fixedly connected to the second clamping seat, and the transmission gear meshes with the first transmission rack and the second transmission rack respectively. The driving cylinder drives the second transmission rack to move; the transverse feeding mechanism drives the belt sander to move transversely, and the longitudinal feeding mechanism drives the clamping mechanism to move in a direction perpendicular to the transverse feeding mechanism.

2. The workpiece grinding device according to claim 1, characterized in that, a first mounting hole is formed in the driven gear, the first clamp is fixed in the first mounting hole, a second mounting hole is formed in the second clamping plate, and the second clamp is installed in the second mounting hole through a bearing.

3. The workpiece grinding device according to claim 2, characterized in that, a third clamping plate is further provided on the first clamping seat, the third clamping plate is attached to the first clamping plate, and a third clamp having the same structure as the second clamp is provided on the third clamping plate; a third mounting hole is formed in the third clamping plate, and the third clamp is installed in the third mounting hole through a bearing.

4. The workpiece grinding device according to claim 1, characterized in that, the meshing portion of the driven gear and the driving gear is sealed in the first clamping plate, and an oil injection hole is formed in the first clamping plate.

5. The workpiece grinding device according to claim 2, characterized in that, the first clamp and the second clamp are in a ring structure.

6. The workpiece grinding device according to claim 1, characterized in that, the longitudinal feeding mechanism includes a longitudinal lead screw and a longitudinal base that can move along the longitudinal lead screw. The substrate is disposed on the longitudinal base. A rotating shaft and a positioning cylinder for clamping the substrate are provided in the longitudinal base. The rotating shaft is fixedly connected to the substrate, a positioning hole is formed in the substrate, and the positioning cylinder can drive a plunger to extend into the positioning hole.

7. The workpiece grinding device according to claim 1, characterized in that, the belt sander includes a positioning frame, a driving roller, a plurality of follower rollers provided on the positioning frame, a sand belt sleeved on the driving roller and the follower rollers, and a grinding motor for driving the driving roller to rotate. A top plate mechanism for supporting the sand belt for grinding is provided on one side of the positioning frame close to the clamping mechanism.

8. The workpiece grinding device according to claim 7, characterized in that, the top plate mechanism includes a top plate seat, a guide rod, a top plate connected to one end of the guide rod, and a locking handle for fixing the guide rod. The guide rod passes through the top plate seat, the locking handle passes through the top plate seat and locks the guide rod, and the top plate is used to support the sand belt.

9. The workpiece grinding device according to claim 7, characterized in that, the positioning frame includes a bracket fixed on the transverse feed mechanism, a movable frame provided on the bracket, and an angle adjustment block fixedly connected to the movable frame. A clamping groove is formed in the angle adjustment block, and a locking member that can slide along the clamping groove is provided in the clamping groove. The angle adjustment block is locked with the bracket by the locking member being inserted into the clamping groove.

10. The workpiece grinding device according to claim 7, characterized in that, a tensioning assembly is further provided on the positioning frame. The tensioning assembly includes a guide post, a guide post seat, a slider, a connecting plate, a movable plate, and a tensioning wheel provided on the movable plate. The guide post seat is fixed on the positioning frame, the guide post is fixedly connected to the guide post seat, the slider is sleeved on the guide post, the slider and the guide post seat are connected by an elastic member, the connecting plate is fixedly connected to the slider, the movable plate is movably connected to the connecting plate, and the angle of the movable plate is adjusted by an adjusting member passing through the connecting plate and abutting against the movable plate.

11. The workpiece grinding device according to claim 7, characterized in that, the transverse feed mechanism includes a transverse lead screw and a transverse base that can move along the transverse lead screw. The belt sander is fixed on the transverse base, and a dust suction pipe is provided on the transverse base. The dust suction port of the dust suction pipe is located at the lower end of the top plate mechanism.

Images