CN112139930A

CN112139930A - Workpiece polishing equipment

Info

Publication number: CN112139930A
Application number: CN202010995025.5A
Authority: CN
Inventors: 王成; 张维波
Original assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Current assignee: Shenzhen Woer Heat Shrinkable Material Co Ltd
Priority date: 2020-09-21
Filing date: 2020-09-21
Publication date: 2020-12-29

Abstract

The invention discloses workpiece polishing equipment which comprises a transverse feeding mechanism, a longitudinal feeding mechanism, an abrasive belt machine arranged on the transverse feeding mechanism and a clamping mechanism arranged on the longitudinal feeding mechanism, wherein the transverse feeding mechanism is arranged on the longitudinal feeding mechanism; the clamping mechanism comprises a rotatable substrate, a first clamping seat and a second clamping seat, wherein the first clamping seat and the second clamping seat are arranged on the substrate and can move oppositely; a rotatable first clamp is mounted on the first clamping seat, a second clamp which can be matched with the first clamp to rotate is arranged on the second clamping seat, and the first clamp and the second clamp respectively clamp two axial ends of a workpiece; the transverse feeding mechanism drives the belt sander to move transversely, and the longitudinal feeding mechanism drives the clamping mechanism to move along the direction perpendicular to the transverse feeding mechanism. The workpiece is clamped by the first clamping seat and the second clamping seat moving oppositely, so that the clamping and positioning operation is convenient; the belt sander and the clamping mechanism are driven to move by the transverse and longitudinal feeding mechanisms, workpieces are polished in all directions, and the production efficiency is high.

Description

Workpiece polishing equipment

[ technical field ] A method for producing a semiconductor device

The invention relates to the technical field of cable accessory processing, in particular to workpiece polishing equipment.

[ background of the invention ]

At present, a stress cone adopted by a GIS terminal is made of a rubber material, a production mode is formed by die sinking and injection molding, a workpiece produced by the mode has an outer surface joint line and two ends of the workpiece are required to be subjected to rubber injection, cutting and polishing processes are required, and a conventional processing mode is to use a lathe to cut and polish so as to ensure the tolerance size of the product. However, the machining is performed through a lathe, the machining period is long, particularly, the workpiece with the arc surface needs to be clamped and positioned for many times, the requirement on the professional skills of workers is high, and the production cost is high. In view of the above, it is desirable to provide a workpiece polishing apparatus to overcome the above-mentioned drawbacks.

[ summary of the invention ]

The invention aims to provide workpiece polishing equipment which is convenient to clamp and position, high in polishing consistency and high in production efficiency.

In order to achieve the purpose, the invention provides workpiece polishing equipment which comprises a transverse feeding mechanism, a longitudinal feeding mechanism, an abrasive belt machine arranged on the transverse feeding mechanism and a clamping mechanism arranged on the longitudinal feeding mechanism; the clamping mechanism comprises a rotatable substrate, a first clamping seat and a second clamping seat, wherein the first clamping seat and the second clamping seat are arranged on the substrate, and the first clamping seat and the second clamping seat can move oppositely; a rotatable first clamp is mounted on the first clamping seat, a second clamp which can be matched with the first clamp to rotate is arranged on the second clamping seat, and the first clamp and the second clamp respectively clamp two axial ends of a workpiece; the transverse feeding mechanism drives the belt sander to transversely move, and the longitudinal feeding mechanism drives the clamping mechanism to move in the direction perpendicular to the transverse feeding mechanism.

In a preferred embodiment, the first clamping seat comprises a first clamping plate which is vertically arranged, and a rotating assembly which is arranged on the first clamping plate and drives the first clamp to rotate, wherein the rotating assembly comprises a driving gear, a driven gear which is meshed with the driving gear, and a rotary driving member which drives the driving gear to rotate, and the first clamp is fixedly connected with the driven gear; the second clamping seat further comprises a second clamping plate, and the second clamp is movably mounted on the second clamping plate.

In a preferred embodiment, the driven gear is provided with a first mounting hole, the first clamp is fixed in the first mounting hole, the second clamping plate is provided with a second mounting hole, and the second clamp is mounted in the second mounting hole through a bearing.

In a preferred embodiment, a third clamping plate is further arranged on the first clamping seat, the third clamping plate is attached to the first clamping plate, and a third clamp with the same structure as the second clamp is arranged on the third clamping plate; and a third mounting hole is formed in the third clamping plate, and the third clamp is mounted in the third mounting hole through a bearing.

In a preferred embodiment, the meshing position of the driven gear and the driving gear is sealed in the first clamping plate, and the first clamping plate is provided with an oil hole.

In a preferred embodiment, the first and second clamps are ring-shaped structures.

In a preferred embodiment, the clamping mechanism further comprises a movement driving assembly arranged on the substrate, the movement driving assembly comprises a driving cylinder, a first driving rack, a second driving rack and a transmission gear, the first driving rack is fixedly connected with the first clamping seat, the second driving rack is fixedly connected with the second clamping seat, the transmission gear is respectively meshed with the first driving rack and the second driving rack, and the driving cylinder drives the second driving rack to move.

In a preferred embodiment, the longitudinal feeding mechanism includes a longitudinal screw rod and a longitudinal base capable of moving along the longitudinal screw rod, the substrate is disposed on the longitudinal base, a rotating shaft and a positioning cylinder are disposed in the longitudinal base, the rotating shaft is fixedly connected with the substrate, a positioning hole is disposed on the substrate, and the positioning cylinder can drive the plunger to extend into the positioning hole.

In a preferred embodiment, the belt sander comprises a positioning frame, a driving roller, a plurality of following rollers arranged on the positioning frame, an abrasive belt sleeved on the driving roller and the following rollers, and a polishing motor for driving the driving roller to rotate, wherein a top plate mechanism for supporting the abrasive belt to polish is arranged on one side of the positioning frame close to the clamping mechanism.

In a preferred embodiment, the top plate mechanism comprises 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, wherein the guide rod penetrates through the top plate seat, the locking handle penetrates through the top plate seat and locks the guide rod, and the top plate is used for supporting the abrasive belt.

In a preferred embodiment, the locating rack includes be fixed in last support of cross feed mechanism, locate adjustable shelf on the support and with adjustable shelf fixed connection's angle modulation piece, the draw-in groove has been seted up on the angle modulation piece, be equipped with in the draw-in groove and follow the gliding retaining member of draw-in groove, through the retaining member card go into in the draw-in groove will the angle modulation piece with support locking.

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

In a preferred embodiment, the transverse feeding mechanism comprises a transverse screw rod and a transverse base which can move along the transverse screw rod, the belt sander is fixed on the transverse base, a dust suction pipeline is arranged on the transverse base, and a dust suction port of the dust suction pipeline is located at the lower end of the top plate mechanism.

The invention has the beneficial effects that: the first clamp and the second clamp are driven to clamp the workpiece by the opposite movement of the first clamping seat and the second clamping seat, and the clamping and positioning operation is convenient; the belt sander and the clamping mechanism are driven to move through the transverse feeding mechanism and the longitudinal feeding mechanism respectively, the first clamp and the second clamp can be matched to rotate to drive the workpiece to rotate, the workpiece can be polished in all directions, the production efficiency is high, and the polishing consistency is high.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

[ description of the drawings ]

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a perspective view of a workpiece polishing apparatus according to a preferred embodiment of the present invention;

FIG. 2 is a partial block diagram of the workpiece grinding apparatus shown in FIG. 1;

FIG. 3 is a perspective view of the clamping mechanism shown in FIG. 2;

FIG. 4 is a cross-sectional view of the clamping mechanism shown in FIG. 3;

FIG. 5 is a cross-sectional view of the clamping mechanism shown in FIG. 3 at another angle;

FIG. 6 is a perspective view of the longitudinal feed mechanism shown in FIG. 2;

FIG. 7 is a perspective view of an abrasive belt machine according to a preferred embodiment of the present invention;

FIG. 8 is a perspective view of the belt sander shown in FIG. 7 at another angle;

fig. 9 is a perspective view of the infeed mechanism shown in fig. 2.

The reference numbers illustrate: workpiece polishing equipment 100, a transverse feeding mechanism 10, a transverse screw rod 11, a transverse base 12, a dust suction pipeline 13, a dust suction port 131, a second guide roller 14, a second dust-proof belt 15, a longitudinal feeding mechanism 20, a longitudinal screw rod 21, a longitudinal base 22, a rotating shaft 221, a positioning cylinder 222, a bearing sleeve 223, a rotating bearing 224, a first guide roller 23, a first dust-proof belt 24, an abrasive belt machine 30, a positioning frame 31, a support 311, a movable frame 312, an angle adjusting block 313, a clamping groove 3131, a locking piece 314, a driving roller 32, a following roller 33, a driving roller 34, a polishing motor 35, a top plate mechanism 36, a top plate base 361, a guide rod 362, a top plate 363, a locking handle 364, a tensioning assembly 37, a guide post 371, a guide post base 372, a sliding block 373, a connecting plate 374, a movable plate 375, a tensioning wheel 376, an elastic piece 377, a clamping mechanism 40, a base plate 41, a sliding rail 411, The clamping device comprises a first clamp 421, a first clamping plate 422, an oil injection hole 4221, a rotating assembly 423, a driving gear 4231, a driven gear 4232, a rotating driving piece 4233, a third clamping plate 424, a second clamping seat 43, a second clamp 431, a second clamping plate 432, a bearing 433, a motion driving assembly 44, a driving cylinder 441, a first transmission rack 442, a second transmission rack 443, a transmission gear 444, a limiting wheel 445, a frame 50, a caster 51 and a workpiece 200.

[ detailed description ] embodiments

In order to make the objects, technical solutions and advantageous effects of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and the detailed description. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1 and 2, an embodiment of the invention provides a workpiece polishing apparatus 100, which includes a transverse feeding mechanism 10, a longitudinal feeding mechanism 20, an abrasive belt machine 30 disposed on the transverse feeding mechanism 10, and a clamping mechanism 40 disposed on the longitudinal feeding mechanism 20. In this embodiment, the workpiece polishing apparatus 100 further includes a frame 50 for mounting the transverse feeding mechanism 10 and the longitudinal feeding mechanism 20, and a plurality of casters 51 are disposed at a lower end of the frame 50 for facilitating movement of the apparatus.

The transverse feeding mechanism 10 drives the abrasive belt machine 30 to transversely move, the longitudinal feeding mechanism 20 drives the clamping mechanism 40 to move along the direction perpendicular to the transverse feeding mechanism 10, and the abrasive belt machine 30 and the clamping mechanism 40 can approach each other in the horizontal plane for polishing.

Specifically, referring to fig. 3 to 5, the clamping mechanism 40 includes a rotatable substrate 41, a first clamping seat 42 and a second clamping seat 43 disposed on the substrate 41, and the first clamping seat 42 and the second clamping seat 43 can move oppositely; the first clamping seat 42 is provided with a rotatable first clamp 421, the second clamping seat 43 is provided with a second clamp 431 capable of rotating in cooperation with the first clamp 421, and the first clamp 421 and the second clamp 431 respectively clamp two axial ends of the workpiece 200. It can be understood that the first clamp 421 and the second clamp 431 are moved toward each other by the first holder 42 and the second holder 43 moving toward each other to clamp the workpiece 200.

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

First grip slipper 42 includes vertical first grip block 422 that sets up, locates the rotatory subassembly 423 of drive first anchor clamps 421 on first grip block 422, and rotatory subassembly 423 includes driving gear 4231, driven gear 4232 and the rotatory rotary driving piece 4233 of drive driving gear 4231 meshing with driving gear 4231, and first anchor clamps 421 and driven gear 4232 fixed connection. The second clamping seat 43 further comprises a second clamping plate 432, and the second clamp 431 is movably mounted on the second clamping plate 432. As shown in fig. 2, the rotary drive 4233 is a dc motor.

A first mounting hole is formed in the driven gear 4232, 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 mounted in the second mounting hole through the bearing 433.

In this embodiment, the first clamping seat 42 is further provided with a third clamping plate 424, the third clamping plate 424 is attached to the first clamping plate 422, and the third clamping plate 424 is provided with a third clamp having the same structure as the second clamp 431; a third mounting hole is formed in the third clamping plate 424, and the third clamp is mounted in the third mounting hole through a bearing 433. The rotating assembly 423 drives the first clamp 421 to rotate the workpiece 200, and the second clamp 431 and the third clamp rotate together.

Specifically, the meshing position of the driven gear 4232 and the driving gear 4231 is sealed in the first clamping plate 422, and the oil injection hole 4221 is formed in the first clamping plate 422, so that the regular lubrication maintenance work is facilitated, and the transmission stability of the rotating assembly 423 is protected.

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

Furthermore, a pair of sliding rails 411 arranged in parallel is arranged on the substrate 41, the first clamping seat 42 and the second clamping seat 43 are both in sliding fit with the sliding rails 411, and the motion driving assembly 44 is arranged between the pair of sliding rails 411, so that the space is saved.

Referring to fig. 6, the longitudinal feeding mechanism 20 includes a longitudinal screw 21 and a longitudinal base 22 capable of moving along the longitudinal 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 disposed in the longitudinal base 22, the rotating shaft 221 is fixedly connected to the substrate 41, a positioning hole 412 is formed in the substrate 41, and the positioning cylinder 222 can drive the plunger to extend into the positioning hole 412, so as to achieve an accurate positioning function. In this embodiment, the substrate 41 can be rotated by, for example, 90 degrees by hand, and then positioned by the positioning cylinder 222, so as to polish different positions of the workpiece 200.

Specifically, the longitudinal base 22 is provided with a bearing sleeve 223, the rotating shaft 221 is installed in the bearing sleeve 223 through the rotating bearing 224, the rotating function of the rotating shaft 221 is achieved, and one side of the longitudinal base 22 is hung with the gas-electric slip ring, so that the electric wire and the gas circuit are not affected by rotation.

The longitudinal feeding mechanism 20 further includes a pair of first guiding rollers 23 respectively disposed at two ends of the longitudinal screw 21, and a first dust-proof belt 24 is sleeved on the first guiding rollers 23, as shown in fig. 2, the first dust-proof belt 24 is fixedly connected with the longitudinal base 22, and the first dust-proof belt 24 and the longitudinal base 22 move cooperatively, so that the dust-proof effect is good and the first dust-proof belt 24 can be prevented from falling off.

Referring to fig. 7 and 8, the belt sander 30 includes a positioning frame 31, a driving roller 32, a plurality of following rollers 33 disposed on the positioning frame 31, an abrasive belt 34 sleeved on the driving roller 32 and the following rollers 33, and a polishing motor 35 driving the driving roller 32 to rotate, wherein a top plate mechanism 36 for supporting the abrasive belt 34 to polish is disposed on a side of the positioning frame 31 close to the clamping mechanism 40. The grinding motor 35 drives the driving roller 32 to rotate, so as to drive the abrasive belt 34 to rotate, thereby realizing the circular rotation grinding function.

Top plate mechanism 36 includes a top plate base 361, a guide rod 362, a top plate 363 connected to one end of guide rod 362, and a locking handle 364 for fixing guide rod 362, guide rod 362 passing through top plate base 361, locking handle 364 passing through top plate base 361 and locking guide rod 362, top plate 363 for supporting abrasive belt 34, and top plate 363 for supporting abrasive belt 34 to provide a flat sanding surface.

Specifically, the positioning frame 31 includes a support 311 fixed on the transverse feeding mechanism 10, a movable frame 312 disposed on the support 311, and an angle adjusting block 313 fixedly connected to the movable frame 312, the angle adjusting block 313 is provided with a locking slot 3131, a locking member 314 capable of sliding along the locking slot 3131 is disposed in the locking slot 3131, and the locking member 314 is locked with the support 311 by being clamped into the locking slot 3131. In this embodiment, the slot 3131 is arc-shaped, and the angle of sanding of the sanding belt 34 can be adjusted by manually releasing the locking member 314.

The positioning frame 31 is further provided with a tensioning assembly 37, the tensioning assembly 37 includes a guide post 371, a guide post seat 372, a sliding block 373, a connecting plate 374, a movable plate 375 and a tensioning wheel 376 arranged on the movable plate 375, the guide post seat 372 is fixed on the positioning frame 31, the guide post 371 is fixedly connected with the guide post seat 372, the sliding block 373 is sleeved on the guide post 371, the sliding block 373 is connected with the guide post seat 372 through an elastic member 377, the connecting plate 374 is fixedly connected with the sliding block 373, the movable plate 375 is movably connected with the connecting plate 374, and the angle of the movable plate 375 is adjusted by the adjusting member 378 penetrating through the connecting plate 374 and abutting. In this embodiment, the elastic member 377 is a spring.

Referring to fig. 9, the transverse feeding mechanism 10 includes a transverse screw 11 and a transverse base 12 capable of moving along the transverse screw 11, the belt sander 30 is fixed on the transverse base 12, a dust suction pipe 13 is disposed on the transverse base 12, and a dust suction port 131 of the dust suction pipe 13 is located at the lower end of the top plate mechanism 36 for collecting dust falling during polishing. In this embodiment, the transverse screw rod 11 is driven to rotate by a stepping motor, so that the transverse base 12 can make a linear reciprocating motion.

The transverse feeding mechanism 10 further comprises a pair of second guiding rollers 14 respectively arranged at two ends of the transverse screw rod 11, a second dustproof belt 15 is sleeved on the second guiding rollers 14, as shown in fig. 2, the second dustproof belt 15 is fixedly connected with the transverse base 12, the second dustproof belt 15 and the transverse base 12 move in a coordinated manner, the dustproof effect is good, and the second dustproof belt 15 can be prevented from falling off.

The working principle of the invention is as follows: the workpiece 200 is clamped by the clamping mechanism 40, the base plate 41 is manually rotated to determine the required grinding surface, and the transverse feeding mechanism 10 and the longitudinal feeding mechanism 20 are automatically carried out according to the equipment program so as to control the grinding depth of the abrasive belt machine 30 and ensure the consistency of workpiece processing.

According to the workpiece polishing device 100 provided by the embodiment of the invention, the first clamp 421 and the second clamp 431 are driven to clamp the workpiece 200 by the opposite movement of the first clamping seat 42 and the second clamping seat 43, so that the clamping and positioning operation is convenient; the belt sander 30 and the clamping mechanism 40 are respectively driven to move through the transverse feeding mechanism 10 and the longitudinal feeding mechanism 20, the first clamp 421 and the second clamp 431 can be matched to rotate to drive the workpiece 200 to rotate, the workpiece 200 can be polished in all directions, the production efficiency is high, and the polishing consistency is high.

The invention is not limited solely to that described in the specification and embodiments, and additional advantages and modifications will readily occur to those skilled in the art, so that the invention is not limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.

Claims

1. The workpiece polishing equipment is characterized by comprising a transverse feeding mechanism, a longitudinal feeding mechanism, an abrasive belt machine arranged on the transverse feeding mechanism and a clamping mechanism arranged on the longitudinal feeding mechanism; the clamping mechanism comprises a rotatable substrate, a first clamping seat and a second clamping seat, wherein the first clamping seat and the second clamping seat are arranged on the substrate, and the first clamping seat and the second clamping seat can move oppositely; a rotatable first clamp is mounted on the first clamping seat, a second clamp which can be matched with the first clamp to rotate is arranged on the second clamping seat, and the first clamp and the second clamp respectively clamp two axial ends of a workpiece; the transverse feeding mechanism drives the belt sander to transversely move, and the longitudinal feeding mechanism drives the clamping mechanism to move in the direction perpendicular to the transverse feeding mechanism.

2. The workpiece polishing device as recited in claim 1, wherein the first clamping seat comprises a vertically arranged first clamping plate, and a rotating assembly arranged on the first clamping plate and used for driving the first clamp to rotate, the rotating assembly comprises a driving gear, a driven gear engaged with the driving gear, and a rotating driving member used for driving the driving gear to rotate, and the first clamp is fixedly connected with the driven gear; the second clamping seat further comprises a second clamping plate, and the second clamp is movably mounted on the second clamping plate.

3. The workpiece polishing apparatus as set forth in claim 2, wherein the driven gear has a first mounting hole formed therein, the first clamp is fixed in the first mounting hole, the second clamping plate has a second mounting hole formed therein, and the second clamp is mounted in the second mounting hole through a bearing.

4. The workpiece polishing device as recited in claim 3, wherein a third clamping plate is further disposed 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 disposed on the third clamping plate; and a third mounting hole is formed in the third clamping plate, and the third clamp is mounted in the third mounting hole through a bearing.

5. The workpiece polishing apparatus as recited in claim 2, wherein the engagement portion of the driven gear and the driving gear is sealed in the first clamping plate, and the first clamping plate is provided with an oil hole.

6. The workpiece sharpening apparatus of claim 3, wherein said first clamp and said second clamp are of annular configuration.

7. The workpiece polishing device according to claim 1, wherein the clamping mechanism further comprises a motion driving assembly arranged on the base plate, the motion driving assembly comprises a driving cylinder, a first driving rack, a second driving rack and a transmission gear, the first driving rack is fixedly connected with the first clamping seat, the second driving rack is fixedly connected with the second clamping seat, the transmission gear is respectively meshed with the first driving rack and the second driving rack, and the driving cylinder drives the second driving rack to move.

8. The workpiece polishing device according to claim 1, wherein the longitudinal feeding mechanism comprises a longitudinal screw rod and a longitudinal base capable of moving along the longitudinal screw rod, the substrate is disposed on the longitudinal base, a rotating shaft and a positioning cylinder are disposed in the longitudinal base, the rotating shaft is fixedly connected with the substrate, a positioning hole is disposed in the substrate, and the positioning cylinder can drive the plunger to extend into the positioning hole.

9. The workpiece polishing device according to claim 1, wherein the belt sander comprises a positioning frame, a driving roller, a plurality of following rollers disposed on the positioning frame, a polishing belt sleeved on the driving roller and the following rollers, and a polishing motor for driving the driving roller to rotate, and a top plate mechanism for supporting the polishing belt is disposed on one side of the positioning frame close to the clamping mechanism.

10. The workpiece polishing apparatus as set forth in claim 9, wherein the top plate mechanism includes a top plate holder, a guide rod passing through the top plate holder, a top plate connected to one end of the guide rod, and a locking handle for fixing the guide rod, the locking handle passing through the top plate holder and locking the guide rod, the top plate for supporting the abrasive belt.

11. The workpiece polishing device according to claim 9, wherein the positioning frame comprises a bracket fixed on the transverse feeding mechanism, a movable frame arranged on the bracket, and an angle adjusting block fixedly connected with the movable frame, a clamping groove is formed in the angle adjusting block, a locking member capable of sliding along the clamping groove is arranged in the clamping groove, and the angle adjusting block and the bracket are locked by clamping the locking member into the clamping groove.

12. The workpiece polishing apparatus as claimed in claim 9, wherein the positioning frame further comprises a tensioning assembly, the tensioning assembly comprises a guide post, a guide post seat, a sliding block, a connecting plate, a movable plate and a tensioning wheel arranged on the movable plate, the guide post seat is fixed on the positioning frame, the guide post is fixedly connected with the guide post seat, the sliding block is sleeved on the guide post, the sliding block is connected with the guide post seat through an elastic member, the connecting plate is fixedly connected with the sliding block, the movable plate is movably connected with the connecting plate, and an angle of the movable plate is adjusted by an adjusting member passing through the connecting plate and abutting against the movable plate.

13. The workpiece polishing device according to claim 9, wherein the transverse feeding mechanism comprises a transverse screw rod and a transverse base which can move along the transverse screw rod, the belt sander is fixed on the transverse base, a dust suction pipeline is arranged on the transverse base, and a dust suction port of the dust suction pipeline is located at the lower end of the top plate mechanism.