CN115229608B

CN115229608B - Polishing device

Info

Publication number: CN115229608B
Application number: CN202110405556.9A
Authority: CN
Inventors: 周方科; 朱建峰; 刘小明
Original assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Current assignee: Guangdong Tianji Industrial Intelligent System Co Ltd
Priority date: 2021-04-15
Filing date: 2021-04-15
Publication date: 2023-11-28
Anticipated expiration: 2041-04-15
Also published as: CN115229608A

Abstract

The invention relates to a grinding device, comprising: for polishing a first location and a second location of a workpiece, the polishing apparatus comprising: a first bearing mechanism; for carrying the workpiece and exposing the first location. The second bearing mechanism is used for bearing the workpiece, is arranged at intervals with the first bearing mechanism and exposes the second position. And the conveying mechanism is used for conveying the workpiece from the first bearing mechanism to the second bearing mechanism. And the covering mechanism is arranged opposite to the second bearing mechanism and is used for covering the covering position of the workpiece on the second bearing mechanism. And the polishing mechanism is used for polishing the first position and the second position. So can make the work piece polish and avoid artifical participation, improve work efficiency that the work piece polished on the basis of guaranteeing the quality.

Description

Polishing device

Technical Field

The invention relates to the technical field of mechanical tools, in particular to a polishing device.

Background

For some bent cylindrical workpieces, the workpieces are typically bent from straight round tubes. Some parts on the surface of the bent pipe are generally uneven, so that the bent pipe needs to be polished to eliminate the defects, however, the traditional polishing usually adopts a manual or semi-automatic operation mode, so that polishing efficiency is affected on one hand, and polishing quality is difficult to ensure on the other hand.

Disclosure of Invention

The invention solves the technical problem of improving the polishing work effect on the basis of ensuring the quality.

A grinding apparatus for grinding a first location and a second location of a workpiece, the grinding apparatus comprising:

a first bearing mechanism; for carrying the workpiece and exposing the first location;

the second bearing mechanism is used for bearing the workpiece, is arranged at intervals with the first bearing mechanism and exposes the second position;

a carrying mechanism for carrying the workpiece from the first carrying mechanism to the second carrying mechanism;

the covering mechanism is arranged opposite to the second bearing mechanism and is used for covering a covering position of the workpiece on the second bearing mechanism; a kind of electronic device with high-pressure air-conditioning system

And the polishing mechanism is used for polishing the first position and the second position.

In one embodiment, the first and second bearing mechanisms comprise a bearing table, a lifting table, a clamping assembly and a driving assembly, a clearance hole is formed in the bearing table, the clamping assembly is fixed on the lifting table, the driving assembly is used for driving the lifting table to move close to or away from the bearing table, and the clamping assembly can slide relative to the clearance hole and is used for clamping the workpiece.

In one embodiment, the driving assembly comprises a driver, a sliding piece and a pushing block, the driver is used for driving the sliding piece to slide, the pushing block is fixed on the bearing table and provided with a sliding hole, the sliding piece is provided with a first station and a second station in the sliding hole, and when the driver drives the sliding piece to move from the first station to the second station, the lifting table moves close to the bearing table.

In one embodiment, the sliding piece comprises a sliding block and a roller, the roller is rotatably arranged on the sliding block and matched with the sliding hole, and the second station is closer to the lifting table than the first station.

In one embodiment, the polishing mechanism comprises a bearing frame, a movable frame and polishing heads, the movable frame is in sliding connection with the bearing frame, the polishing heads are in sliding connection with the movable frame, the sliding directions of the polishing heads relative to the movable frame are perpendicular to the sliding directions of the movable frame relative to the bearing frame, and the number of the polishing heads is two and two, and the polishing heads are separated on two opposite sides of the movable frame.

In one embodiment, the covering mechanism includes a covering assembly that is movable toward and away from the second carrier mechanism, and the covering assembly is capable of pressing against the second carrier mechanism to cover a covering location of the workpiece.

In one embodiment, the covering component comprises a covering plate and a covering strip, wherein the covering plate is provided with a containing groove for containing the workpiece, and the covering strip is connected with the covering plate and spans the containing groove and is used for covering the covering position.

In one embodiment, the handling mechanism comprises a clamping jaw capable of rotating, and the clamping jaw is further capable of sliding back and forth between the first and second carrying mechanisms.

In one embodiment, the device further comprises a loading mechanism, wherein the loading mechanism comprises a lifting table and limiting rods, the limiting rods are multiple in number and are arranged at intervals around the lifting table, and the lifting table can slide relative to the limiting rods.

In one embodiment, the device further comprises an unloading mechanism, wherein the unloading mechanism comprises a first clamping block and a second clamping block which are arranged at intervals, and the second clamping block can slide close to or far away from the first clamping block.

One technical effect of one embodiment of the present invention is: the polishing mechanism polishes the first position of the workpiece on the first bearing mechanism, and the covering mechanism covers the workpiece on the second bearing mechanism without covering the workpiece, so that the polishing mechanism polishes the second position of the workpiece on the second bearing mechanism. And transfer the work piece from first bearing mechanism to second bearing mechanism through handling mechanism, so can improve work efficiency that the work piece polished on the basis of guaranteeing the quality.

Drawings

FIG. 1 is a schematic perspective view of a workpiece;

FIG. 2 is a schematic perspective view of the workpiece of FIG. 1 from another perspective;

FIG. 3 is a schematic perspective view of a polishing apparatus according to an embodiment;

FIG. 4 is a schematic perspective view of the polishing apparatus of FIG. 3 at another perspective;

FIG. 5 is a schematic view of a partial perspective view of the polishing device shown in FIG. 3 when the cover plate is not abutted against the second carrying mechanism;

FIG. 6 is a schematic view of a partial perspective view of the polishing device shown in FIG. 3 when the cover plate abuts against the second carrying mechanism;

FIG. 7 is a schematic perspective view of a first carrying mechanism of the polishing apparatus shown in FIG. 3;

FIG. 8 is an exploded view of the first carrying mechanism shown in FIG. 7;

FIG. 9 is a partially exploded view of FIG. 8;

FIG. 10 is a schematic perspective view of a handling mechanism of the polishing apparatus of FIG. 3;

fig. 11 is a schematic perspective view of a polishing mechanism in the polishing apparatus shown in fig. 3.

Detailed Description

In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. The drawings illustrate preferred embodiments of the invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "inner", "outer", "left", "right" and the like are used herein for illustrative purposes only and do not represent the only embodiment.

Referring to fig. 1, 2 and 3, an embodiment of the present invention provides a polishing apparatus 10 for polishing a first location 21 and a second location 22 of a workpiece 20. The workpiece 20 may be a bent tube, which is typically formed by bending a straight round tube. When the bent pipe is horizontally placed on a horizontal plane in two different positive and negative postures, one bus is in contact with the horizontal plane in each placing posture. In other words, the bent pipe is cut by a cutting plane parallel to the horizontal plane and passing through the central axis of the bent pipe, the bent pipe is cut to form two cutting parts symmetrically arranged relative to the cutting plane, and obviously, the two bus bars are respectively positioned on the two cutting parts, and the positions of the two bus bars are the first position 21 and the second position 22 which are required to be polished. Of course, the second position 22 of the workpiece 20 is provided with the two-dimensional code 23, and the position where the two-dimensional code 23 is located is the covering position 23a, so that when the second position 22 is polished, the two-dimensional code 23 should be covered, so as to prevent the polishing device 10 from damaging the two-dimensional code 23. By the grinding treatment of the grinding device 10, the ribs which are relatively protruded at the first position 21 and the second position 22 can be eliminated, and smooth transition of the surface of the whole polished bent pipe can be ensured. Referring to fig. 3 and 4, the polishing apparatus 10 includes a first carrying mechanism 100, a second carrying mechanism 200, a covering mechanism 300, a carrying mechanism 400, a polishing mechanism 500, a loading mechanism 600, an unloading mechanism 700, and a supporting box 800.

Referring to fig. 3, 7 and 8, in some embodiments, the first carrying mechanism 100 is disposed on the supporting box 800, and the first carrying mechanism 100 includes a carrying table 110, a lifting table 120, a clamping assembly 130 and a driving assembly 140. The bearing table 110 may have a substantially plate-shaped structure, the bearing table 110 may be fixed above the supporting box 800 by a fixing rod, and the bearing table 110 is provided with a plurality of avoidance holes 111, the number of the avoidance holes 111 is two, and the two avoidance holes 111 may be arranged at intervals along the length direction of the bearing table 110. The lifting platform 120 has a substantially plate-shaped structure, and the lifting platform 120 is located below the carrying platform 110 and can slide relative to the supporting box 800, for example, the lifting platform 120 may be slidably connected to a supporting block fixed on the supporting box 800, so that the lifting platform 120 slides back and forth relative to the supporting box 800 in a vertical direction (i.e., in a Z-axis direction) in a space between the carrying platform 110 and the supporting box 800. The clamping assembly 130 may include a plurality of clamping cylinders, the cylinder of which is fixed to the upper surface of the elevating platform 120, which is obviously disposed toward the loading platform 110, and the clamping claws 131 of which are slidably disposed in the avoiding holes 111. For example, the number of the clamping cylinders may be four, and two clamping cylinders are provided at each end of the elevating table 120 in the length direction.

Referring to fig. 8 and 9, the driving assembly 140 includes a driver 141, a slider 142 and a pushing block 143, and the slider 142 includes a slider 142a and a roller 142b. Specifically, the driver 141 may be an air cylinder, the slider 142a is slidably connected to the supporting case 800, the slider 142a may slide along a first direction relative to the supporting case 800, the first direction may be a front-back direction (i.e., an X-axis direction), a cylinder barrel of the air cylinder is fixed on the supporting case 800, a piston rod of the air cylinder is connected to the slider 142a, and when the piston rod performs telescopic motion, the slider 142a may be driven to reciprocate in the front-back direction. The roller 142b is rotatably disposed on the slider 142a, such that the roller 142b can rotate relative to the slider 142 a. The pushing block 143 may have a plate-like structure, and the pushing block 143 is fixed on a lower surface of the lifting platform 120, and obviously, the lower surface is disposed facing the supporting box 800 away from the carrying platform 110. The pushing block 143 is provided with a sliding hole 143a, the sliding hole 143a may be a strip-shaped hole such as a racetrack-shaped hole or an oval hole, and the roller 142b is matched with the sliding hole 143 a. When the driver 141 drives the slider 142a to slide reciprocally, the roller 142b will roll reciprocally in the slide hole 143a, and the roller 142b has two extreme positions in the slide hole 143a, which are respectively denoted as a first station 143c and a second station 143d, and the second station 143d is closer to the lifting table 120 than the first station 143c, in other words, the second station 143d is obliquely above the first station 143 c.

When the piston rod of the driver 141 extends to drive the slider 142a to move forward and the roller 142b moves from the first station 143c to the second station 143d, the roller 142b drives the lifting platform 120 to move up close to the carrying platform 110 through the pushing block 143, so that the gripper jaw 131 moves up relative to the avoidance hole 111, and when the roller 142b moves to the second station 143d, the lifting platform 120 moves up to the limit position, that is, the gripper jaw 131 moves up to the limit position relative to the avoidance hole 111. When the piston rod of the driver 141 is contracted to drive the slider 142a to move backward and the roller 142b is moved from the second station 143d to the first station 143c, the roller 142b drives the lifting platform 120 to move downward away from the carrying platform 110 through the pushing block 143, so that the gripper jaw 131 moves downward relative to the avoidance hole 111, and when the roller 142b moves to the first station 143c, the lifting platform 120 moves downward to the limit position, that is, the gripper jaw 131 moves downward relative to the avoidance hole 111 to the limit position.

When the workpiece 20 is placed on the first carrying mechanism 100, the second position 22 of the workpiece 20 faces downward and is closely attached to the upper surface of the carrying table 110, so that the first position 21 of the workpiece 20 faces upward and is exposed to the outside, so that the subsequent grinding mechanism 500 can perform grinding treatment on the first position 21. Two workpieces 20 can be placed on the bearing table 110 at the same time, the middle parts of the workpieces 20 are borne on the upper surface of the bearing table 110, two ends of each workpiece 20 are clamped by the clamping claws 131 of the clamping assembly 130 to be fixed, and the workpieces 20 are prevented from moving and rotating in the subsequent grinding process, so that the polishing mechanism 500 can precisely process the first position 21. In view of the fact that the upper surface of the loading table 110 is fixed relative to the supporting case 800, if the position of the clamping jaw 131 relative to the avoiding hole 111 is kept constant, when the cross-sectional dimension (diameter) of the workpiece 20 is increased, the clamping jaw 131 is caused to reduce the clamping area of the workpiece 20, and a stable and reliable clamping effect cannot be formed; when the cross-sectional dimension (diameter) of the workpiece 20 is reduced, the clamping area of the workpiece 20 will be increased by the clamping jaw 131, resulting in the end of the clamping jaw 131 protruding from the first position 21 of the workpiece 20, such that the clamping jaw 131 interferes with the grinding of the workpiece 20. Therefore, when the workpiece 20 has a diameter of 10mm, the roller 142b can be moved to the second station 143d so that the gripper jaw 131 moves upward to the limit position to form a reliable grip on the workpiece 20 having a large size. When the diameter of the workpiece 20 is 8mm, the roller 142b may be moved to the first station 143c so that the gripper jaw 131 moves downward to the limit position, preventing the end of the gripper jaw 131 from protruding beyond the first position 21 to interfere with the grinding of the workpiece 20. When the diameter of the workpiece 20 is between 8mm and 10mm, the roller 142b can be moved to a proper position between the first station 143c and the second station 143d, ensuring that the gripper jaw 131 forms a stable and reliable grip on the workpiece 20 without constituting an interference.

Referring to fig. 3, 5 and 6, the second carrying mechanism 200 may be identical in structure to the first carrying mechanism 100, that is, the second carrying mechanism 200 includes the carrying table 110, the lifting table 120, the clamping assembly 130 and the driving assembly 140, so reference may be made to the above description of the first carrying mechanism 100, and the description thereof will not be repeated here. The second carrying mechanism 200 and the first carrying mechanism 100 are arranged at intervals along the front-rear direction. When the workpiece 20 is placed on the second carrying mechanism 200, the first position 21 of the workpiece 20 faces downward to be closely attached to the upper surface of the carrying table 110 of the second carrying mechanism 200, so that the second position 22 of the workpiece 20 faces upward to be exposed to the outside, so that the subsequent grinding mechanism 500 can perform grinding treatment on the second position 22.

Referring to fig. 3, 5 and 6, in some embodiments, the covering mechanism 300 is disposed beside the second carrying mechanism 200. The cover mechanism 300 includes a power source 310, a mounting frame 320, and a cover assembly 330, the cover assembly 330 including a cover plate 331 and a cover strip 332. Specifically, the mounting frame 320 is fixed to the support case 800, the power source 310 may be a cylinder, a linear motor, or the like, the cover 331 is a substantially plate-shaped mechanism, the cover 331 is slidably disposed on the mounting frame 320, and the cover 331 is reciprocally slidable in a vertical direction (Z-axis direction) with respect to the mounting frame 320. An output shaft of the power source 310 is connected to the cover 331 so as to drive the cover 331 to reciprocate up and down with respect to the mounting frame 320. The cover 331 is provided with a receiving groove 331a, and the shape of the receiving groove 331a is adapted to the shape of the workpiece 20, for example, the shapes of the receiving groove 331a and the workpiece 21 may be W-shaped or S-shaped. The accommodating groove 331a penetrates the entire cover plate 331 in the thickness direction, and the cover strip 332 straddles the accommodating groove 331a and is fixed to the cover plate 331 at both ends. When the power source 310 drives the cover 331 to move downward until the power source abuts against the carrying table 110 of the second carrying mechanism 200, the workpiece 20 is accommodated in the accommodating groove 331a, and the second position 22 of the workpiece 20 protrudes out of the cover 331 by a certain height, which may be about 1mm, so that the interference of the cover 331 can be eliminated, and the second position 22 is ground by the subsequent grinding mechanism 500. Meanwhile, the covering strip 332 can effectively cover the covering position 23a of the two-dimensional code 23 on the workpiece 20, so as to prevent the grinding mechanism 500 from damaging the two-dimensional code 23 in the grinding process. After the grinding process is completed, the power source 310 can be enabled to drive the cover plate 331 to move upwards away from the second carrying mechanism 200, so that the workpiece 20 can be smoothly removed from the second carrying mechanism 200.

Referring to fig. 3 and 10, in some embodiments, the handling mechanism 400 includes a clamping jaw 410, a traversing element 420, and a transmission element 430, where the traversing element 420 is slidably disposed on the supporting case 800, and the transmission element 430 is disposed on the supporting case 800 and is used to drive the traversing element 420 to slide relative to the supporting case 800. The transmission member 430 may be a timing belt, etc., and the traverse member 420 may reciprocally slide in the front-rear direction with respect to the supporting case 800. The clamping jaw 410 is rotatably disposed on the traverse member 420, and the traverse member 420 can drive the clamping jaw 410 to rotate. For example, the traverse 420 may be a rotary cylinder, and the clamping jaw 410 may be a clamping jaw of a clamping cylinder fixed to a rotation shaft of the rotary cylinder. After the workpiece 20 is machined on the first carrying mechanism 100, the clamping jaw 410 can clamp the end of the workpiece 20, then the clamping jaw 410 slides towards the second carrying mechanism 200, when the workpiece 20 reaches the second carrying mechanism 200, the clamping jaw 410 can rotate 180 degrees, then the second position 22 originally arranged downwards is converted into the upwards arrangement, and finally the clamping jaw 410 places the workpiece 20 with the second position 22 upwards on the carrying table 110 of the second carrying mechanism 200, so that the subsequent polishing mechanism 500 can perform polishing treatment on the second position 22.

Referring to fig. 3 and 11, in some embodiments, the polishing mechanism 500 includes a carrier 510, a moving frame 520, and a polishing head 530, the carrier 510 is fixed to the supporting case 800, the carrier 510 extends in a left-right direction (Y-axis direction), the moving frame 520 is slidably connected to the carrier 510, and the movement can be driven by a linear motor so that the moving frame 520 slides in a left-right direction with respect to the carrier 510. The polishing head 530 is slidably connected to the movable frame 520, and the polishing head 530 may be driven by a linear motor so that the polishing head 530 slides back and forth in a vertical direction (Z-axis direction) relative to the movable frame 520, and obviously, the sliding direction of the polishing head 530 relative to the movable frame 520 is perpendicular to the sliding direction of the movable frame 520 relative to the carrier 510. The number of the polishing heads 530 may be two, and the two polishing heads 530 are disposed on opposite sides of the movable frame 520, so that one of the polishing heads 530 is located just above the first carrying mechanism 100, so as to perform the grinding process on the first position 21 of the workpiece 20 on the first carrying mechanism 100. The other sanding head 530 is located just above the second carrier 200 to perform a grinding process on the second location 22 of the workpiece 20 on the second carrier 200. When the polishing head 530 moves downward relative to the moving frame 520 to press against the workpiece 20 and polish the workpiece 20, the moving frame 520 can move in the left-right direction relative to the carrying frame 510, i.e. the polishing head 530 is driven to move along the length direction of the workpiece 20, so that the polishing head 530 can effectively polish each part of the first position 21 or the second position 22 of the workpiece 20. The polishing head 530 may include a polishing body 531 and a polishing sheet 532, the polishing body 531 being slidably disposed on the movable frame 520, the polishing sheet 532 being substantially disk-shaped and adhered to the polishing body 531, i.e., the polishing body 531 serves as a carrier of the polishing sheet 532, the polishing sheet 532 being in direct contact with the workpiece 20 to polish the workpiece 20.

Referring to fig. 3, 5 and 6, in some embodiments, the loading mechanism 600 includes a lifting platform 610 and a plurality of limiting rods 620, the number of limiting rods 620 is plural, the lifting platform 610 is similar to the shape of the polishing pad 532, i.e. the lifting platform 610 is also disk-shaped, and the lifting platform 610 is used to carry the polishing pad 532. The number of the limiting rods 620 is multiple, the lower ends of the limiting rods 620 are fixed on the supporting box 800, the upper ends of the limiting rods 620 are free ends, the limiting rods 620 are arranged around the lifting table 610, and the limiting rods 620 are uniformly arranged at intervals along the circumferential direction of the lifting table 610. The lifting table 610 may be driven by an air cylinder to reciprocate up and down with respect to the stopper 620, thereby driving the polishing sheet 532 to move upward in the space defined by the stopper 620. Specifically, a plurality of polishing sheets 532 are stacked in a space defined by the stopper rod 620, and when the uppermost polishing sheet 532 is sucked by the polishing body 531 at a designated position, the lifting table 610 can be moved upward by a reasonable distance approximately equal to the thickness of the polishing sheet 532, so that the next polishing sheet 532 is also positioned at the designated position for the suction of the polishing body 531.

Referring to fig. 3, 5 and 6, in some embodiments, the unloading mechanism 700 includes a first clamp block 710 and a second clamp block 720, both of the first clamp block 710 and the second clamp block 720 being disposed at intervals in the vertical direction, both of the first clamp block 710 and the second clamp block 720 being located directly above the support box 800. The first clamping block 710 may be positioned above the second clamping block 720 and fixed with respect to the support case 800, and the second clamping block 720 may be reciprocally moved in a vertical direction by a cylinder drive so that the second clamping block 720 can slide close to or away from the first clamping block 710. When the movable frame 520 drives the polishing sheet 532 to be scrapped to move within a reasonable height range into a gap between the first clamping block 710 and the second clamping block 720, the second clamping block 720 can be made to move close to the first clamping block 710, so that the polishing sheet 532 is clamped between the first clamping block 710 and the second clamping block 720, and then the movable frame 520 drives the polishing body 531 to move in the left-right direction, so that the polishing body 531 overcomes friction force with the polishing sheet 532 to be far away from the polishing sheet 532, and finally the polishing sheet 532 to be scrapped is separated from the polishing body 531. When the scrapped polishing sheet 532 is detached from the polishing body 531, the polishing body 531 may be moved over the loading mechanism 600 so that the polishing body 531 adheres to a new polishing sheet 532.

The polishing apparatus 10 may be operated in a number of ways including the following steps: in the first step, the workpiece 20 is placed on the carrying table 110 of the first carrying mechanism 100 with the first position 21 set up, and then the clamping assembly 130 is caused to clamp both ends of the workpiece 20. In the second step, the polishing head 530 is pressed against one end of the workpiece 20 by the left-right sliding of the moving frame 520 with respect to the carrier 510 and the up-down sliding of one of the polishing heads 530 with respect to the moving frame 520. The movable frame 520 is then slid in the left-right direction with respect to the carrier frame 510 toward the other end of the workpiece 20 so that the grinding head 530 performs the grinding process on all of the first positions 21 of the workpiece 20. Third, the clamping jaw 410 of the carrying mechanism 400 clamps the end of the workpiece 20 such that the clamping jaw 410 clamps the workpiece 20 to move in the front-rear direction to the second carrying mechanism 200. The clamping jaw 410 is then caused to rotate the workpiece 20 through 180 ° so that the originally set-up second position 22 is converted into an upwardly set-up, and finally the clamping jaw 410 places the workpiece 20 on the second carrier 200. Fourth, the cover plate 331 of the covering mechanism 300 moves downward and presses against the second bearing mechanism 200, so that the two-dimensional code 23 on the workpiece 20 is covered by the cover strip 332. Fifth, the polishing head 530 is pressed against one end of the workpiece 20 by the left-right sliding of the moving frame 520 relative to the carrier 510 and the up-down sliding of the other polishing head 530 relative to the moving frame 520. The movable frame 520 is then slid in the left-right direction with respect to the carrier frame 510 toward the other end of the workpiece 20 so that the grinding head 530 performs the grinding process on all of the second positions 22 of the workpiece 20. In a sixth step, when the second position 22 of the workpiece 20 is finished, the cover plate 331 is moved upward away from the second carrying mechanism 200, so that the clamping claws 410 of the carrying mechanism 400 clamp the end of the workpiece 20, and the workpiece 20 is moved out of the second carrying mechanism 200 for being transported to the next station for processing. The polishing work efficiency is greatly improved on the basis of guaranteeing the polishing quality without manual participation in each step.

When the polishing pad 532 is too worn, the polishing pad 532 may be moved to the unloading mechanism 700 so that the unloading mechanism 700 unloads the polishing pad 532 that is too worn to be scrapped from the polishing body 531. The new polishing sheet 532 is then reinstalled on the polishing body 531 after the polishing body 531 from which the polishing sheet 532 has been unloaded is moved to the loading mechanism 600.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. A grinding apparatus for grinding a first location and a second location of a workpiece, the grinding apparatus comprising:

The polishing mechanism is used for polishing the first position and the second position;

the polishing mechanism comprises a bearing frame, a movable frame and polishing heads, wherein the movable frame is in sliding connection with the bearing frame, the polishing heads are in sliding connection with the movable frame, the sliding directions of the polishing heads relative to the movable frame are perpendicular to the sliding directions of the movable frame relative to the bearing frame, and the number of the polishing heads is two and respectively occupies two opposite sides of the movable frame.

2. The polishing apparatus according to claim 1, wherein the first and second carrying mechanisms each include a carrying table, a lifting table, a clamping assembly, and a driving assembly, the carrying table is provided with a clearance hole, the clamping assembly is fixed to the lifting table, the driving assembly is used for driving the lifting table to move close to or away from the carrying table, and the clamping assembly is capable of sliding relative to the clearance hole and is used for clamping the workpiece.

3. A polishing apparatus according to claim 2 wherein the drive assembly comprises a drive for driving the slider to slide, a slider fixed to the carrier and having a slide aperture therein, and a pusher block having a first station and a second station therein, the lift table being movable adjacent the carrier when the drive moves the slider from the first station to the second station.

4. A grinding apparatus as defined in claim 3, wherein said slide includes a slide and a roller rotatably disposed on said slide and engaging said slide aperture, said second station being closer to said lift table than said first station.

5. A grinding apparatus as defined in claim 1, wherein the cover mechanism includes a cover assembly movable toward and away from the second carrier mechanism, and wherein the cover assembly is configured to press against the second carrier mechanism to cover a covered location of the workpiece.

6. The polishing apparatus of claim 5, wherein the cover assembly comprises a cover plate having a receiving slot for receiving the workpiece and a cover bar connected to the cover plate and straddling the receiving slot for covering the covering location.

7. A sanding device according to claim 1 wherein said carrying mechanism includes a clamping jaw capable of rotating and said clamping jaw is further capable of reciprocating sliding between said first carrying mechanism and said second carrying mechanism.

8. The polishing apparatus of claim 1, further comprising a loading mechanism comprising a plurality of lift tables and a stop bar, the stop bar being spaced around the lift tables, the lift tables being slidable relative to the stop bar.

9. The grinding apparatus of claim 1, further comprising an unloading mechanism comprising first and second spaced apart clamp blocks, the second clamp block being capable of sliding toward or away from the first clamp block.