CN114505779A

CN114505779A - Reciprocating polishing device for arc-shaped part

Info

Publication number: CN114505779A
Application number: CN202210157202.1A
Authority: CN
Inventors: 张晓兰; 隋天润; 薛守智; 王汝元; 韩琳; 刘天慧
Original assignee: Qingdao Oake Intelligent System Co ltd
Current assignee: Qingdao Oake Intelligent System Co ltd
Priority date: 2022-02-21
Filing date: 2022-02-21
Publication date: 2022-05-17

Abstract

The invention discloses a circular arc reciprocating polishing device, which comprises: polishing fixture, swing mechanism and slewing mechanism, during the polishing, three kinds of mechanisms, mutually support. The part rotating mechanism drives the part to rotate, the polishing mechanism drives the forming grinding tool to rotate and apply pressure, and the swinging mechanism swings back and forth to polish the surface of the arc-shaped part. The device ensures that high-precision machine tool machining is not needed when the arc part with high surface hardness is polished, so that the cost of the working procedure is reduced; compared with a high-precision machine tool, the polishing equipment has low requirement on knowledge storage of workers, and can be operated more simply for polishing; the mechanical device is polished in a fixed form, and errors are not easy to occur in operation compared with the operation of a machine tool by workers; compared with machine tool machining, the machine tool machining method is easier to popularize, can realize large-batch machining more easily, and is high in efficiency; two groups of forming grinding tools are adopted, two sides are polished, and the consumed time is short.

Description

Reciprocating polishing device for arc-shaped part

Technical Field

The invention belongs to the technical field of automatic polishing devices, and particularly relates to an arc reciprocating polishing device.

Background

Polishing devices, mostly called polishers, also called grinders, are often used for mechanical grinding, polishing and waxing. The working principle is as follows: the motor drives the sponge or wool polishing disc arranged on the polishing machine to rotate at a high speed, and the polishing disc and the polishing agent act together and rub the surface to be polished, so that the aims of removing paint surface pollution, oxide layer and shallow mark can be achieved. The rotation speed of the polishing disk is generally 1500-3000r/min, and is mostly continuously variable, and can be adjusted at any time during construction according to requirements. However, the existing polishing device is difficult to polish the circular arc surface with high smoothness, and the beam is unfair when some precision ball valves are polished; and when the surface hardness of the arc part is not high, the Hooke can be used to improve the surface smoothness. Tempering after surface high-frequency quenching, and using a high-precision, high-rotation-speed and multi-shaft machine tool under the condition that the hardness is HRC 58-60. In the existing machine tool polishing device, the following defects also exist:

1. for the polishing of parts with high surface hardness, the parts can only be polished by a high-price machine tool, the processing difficulty of the parts is high, and the cost is greatly increased.

2. Compared with a reciprocating polishing device for arc pieces, the machine tool is difficult to process in a large quantity, batch processing is realized, and the efficiency is quite low.

3. The machine tool processes the single side of the formed cutter made of various materials. Compared with the arc-shaped piece reciprocating polishing device with two sides processed simultaneously and pressure pressing polishing, the time consumption is quite high.

4. The high-precision machine tool is operated, the requirement on knowledge storage of workers is high, and the operation and machining difficulty is high.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention designs the arc reciprocating polishing device which is convenient for polishing and grinding parts through long-term working practice.

The invention provides a circular arc reciprocating polishing device, which comprises:

the polishing clamping mechanism comprises a polishing clamping mechanism I and a polishing clamping mechanism II, and the polishing clamping mechanism I and the polishing clamping mechanism II are symmetrically arranged at two ends of the machine base;

the swinging mechanism comprises a base, a tray, a bearing seat, a platform plate, a speed reduction motor IV and a connecting rod, wherein the tray for bearing polishing scraps is arranged above the base, the lower part of the base is connected with a central plate of the platform plate through the bearing seat, an edge plate of the platform plate is fixedly connected with a helical gear reducer of the speed reduction motor IV, and an output shaft of the helical gear reducer is fixedly connected to the central position of the kidney slot rotating disc; a hole at the edge of the waist groove rotating disc is connected with a shaft at one end of a connecting rod, and a shaft at the other end of the connecting rod is connected with a hole of a polishing clamping mechanism II;

the rotating mechanism is arranged in a plane vertical to the polishing clamping mechanism and comprises a spindle assembly and a tailstock assembly symmetrical to the spindle assembly, and the spindle assembly and the tailstock assembly are arranged on a middle vertical line of the machine base.

Further, polishing fixture I includes:

the speed reducing motor I is connected with the bearing seat I through a connecting piece I, one end of the connecting piece I penetrates through the bearing mounting plate I and is fixedly connected with the speed reducing motor I, the middle of the connecting piece I penetrates through the grinding machine seat I, and the other end of the connecting piece I penetrates through the bearing mounting plate II and is fixedly connected with the bearing seat I;

the upper end of the grinding machine base I is inserted with a guide shaft I fixed between the bearing mounting plate I and the bearing mounting plate II, and the lower end of the grinding machine base I is fixedly mounted at the left end of the grinding machine base I;

three-jaw is from centering chuck I, one end and I fixed connection of bearing frame, other end centre gripping is used for polishing the shaping grinding apparatus I of circular arc piece.

Further, install dabber I through sphere area seat bearing in the bearing frame I, the one end and the three-jaw of dabber I are from I fixed connection of centering chuck, and the other end of dabber I is connected with the one end of dabber II through chain coupling, the middle part of dabber II is installed in frame I of polishing through copper sleeveless bush, the other end of dabber II is connected with gear motor I's drive shaft through copper sleeveless bush.

Further, polishing fixture II includes:

the speed reducing motor II is fixedly connected with the bearing seat II through a connecting piece II, one end of the connecting piece II penetrates through the bearing mounting plate III to be fixedly connected with the speed reducing motor II, the middle of the connecting piece II penetrates through the grinding machine seat II, and the other end of the connecting piece II penetrates through the bearing mounting plate IV to be fixedly connected with the bearing seat II;

the upper end of the grinding machine base II is inserted with a guide shaft II fixed between the bearing mounting plate III and the bearing mounting plate IV, and the lower end of the grinding machine base II is fixedly arranged at the right end of the grinding machine base;

and one end of the three-jaw self-centering chuck II is fixedly connected with the bearing seat II, and the other end of the three-jaw self-centering chuck II is connected with a forming grinding tool II for grinding the arc part.

Further, the spindle assembly includes: chuck frame, gear motor III, three-jaw are from centering chuck III and angular contact bearing subassembly I, the lower extreme fixed mounting of chuck frame is on the frock frame, gear motor III passes through connecting piece III and three-jaw is from centering chuck III fixed connection, connecting piece III passes through the upper end fixed connection of angular contact bearing subassembly I and chuck frame.

Further, the tailstock assembly includes: the manual tailstock and the tailstock base are fixedly connected through a bolt, the lower end of the tailstock base is fixedly installed on the tool framework through a screw, and a conical column handle is arranged at the upper end of the screw.

Furthermore, the lower end of the tailstock base is a tailstock base bottom plate, and two ends of the tailstock base bottom plate are fixedly provided with a linear bearing with a seat, the middle of the linear bearing penetrates through the guide shaft guide rail.

Further, the top of the circular arc reciprocating polishing device is provided with a gantry type automatic conveying and grabbing mechanism, a tool frame is installed below the circular arc reciprocating polishing device, the gantry type automatic conveying and grabbing mechanism comprises a gantry I, a gantry II and a gantry beam, the gantry I and the gantry II are symmetrically arranged at two ends of the gantry beam, and a sucker grabbing mechanism used for grabbing or placing a circular arc piece is slidably installed in the middle of the gantry beam.

Furthermore, proximity switches for automatic detection are installed on the upper end of the sucker grabbing mechanism and the upper ends of the portal I and the portal II.

Further, the tool frame is a cuboid frame formed by mutually welding a transverse frame and a vertical frame, a frame top plate is welded at the upper end of the working frame, and a frame foot plate is welded at the lower end of the working frame.

Compared with the prior art, the invention has the advantages and the technical effects that:

1. and when the arc part with high surface hardness is polished, high-precision machine tool machining is not needed, so that the cost of the process is reduced.

2. Compared with a machine tool with high precision, the polishing machine has low requirement on knowledge storage of workers, and can be operated to polish more simply.

3. Mechanical device, fixed form polishing, contrast workman's operation lathe processing is difficult to go wrong in the operation.

4. Compared with machine tool machining, the machine tool machining method is easier to popularize, can realize large-batch machining more easily, and is high in efficiency; if the truss is loaded and unloaded, the burden of workers can be reduced.

5. Two groups of forming grinding tools polish two sides, and the time consumption is little.

Drawings

Fig. 1 is a schematic front view of an automated grasping and polishing apparatus according to the present invention.

Fig. 2 is a schematic diagram of the overall structure of the automated grasping and polishing apparatus according to the present invention.

Fig. 3 is a schematic view of the overall structure of the circular arc member reciprocating polishing device of the invention.

Fig. 4 is a schematic view of the overall structure of the rotating assembly according to the present invention.

FIG. 5 is a schematic top view of the polishing device for polishing an arc-shaped member according to the present invention.

Fig. 6 is a cross-sectional view a-a of fig. 5 in accordance with the present invention.

Fig. 7 is a cross-sectional view B-B of fig. 5 in accordance with the present invention.

Fig. 8 is an enlarged view of the structure of the division C in fig. 5 according to the present invention.

Fig. 9 is an overall structural view of the gantry type automatic gripping mechanism of the present invention.

In the figure: 10. a circular arc shaped part; 110. installing a shaft pin;

20. polishing the clamping mechanism I; 210. a speed reducing motor I; 220. a connecting piece I; 230. a bearing mounting plate I; 240. a guide shaft I; 250. polishing the machine base I; 260. a bearing mounting plate II; 270. a bearing seat I; 280. A three-jaw self-centering chuck I; 290. forming a grinding tool I;

21. a mandrel I; 22. a mandrel II; 23. a chain coupling; 24. a spherical bearing with a seat; 25. a linear bearing; 26. a cylinder; 27. a copper oilless bushing;

30. polishing the clamping mechanism II; 310. a speed reducing motor II; 320. a connecting piece II; 330. a bearing mounting plate III; 340. a guide shaft II; 350. a grinding machine base II; 360. a bearing mounting plate IV; 370. a bearing seat II; 380. A three-jaw self-centering chuck II; 390. forming a grinding tool II;

40. a tailstock assembly; 410. a manual tailstock; 420. a tailstock base; 421. a tailstock base bottom plate; 430. a tapered handle; 440. a screw;

50. a spindle assembly; 510. a chuck base; 520. a reduction motor III; 530. a connecting piece III; 540. a three-jaw self-centering chuck III; 550. an angular contact bearing assembly I;

60. a swing mechanism; 610. a machine base; 620. a tray; 630. a bearing seat; 640. a platform plate; 641. a center plate; 642. an edge plate; 650. a guide shaft guide rail; 660. a linear bearing with a seat; 670. a baffle plate; 680. a speed reducing motor IV; 681. a helical gear speed reducer; 682. a kidney slot rotating disc; 683. a connecting rod; 684. a rod end oscillating bearing; 685. a corner fitting plate;

70. a gantry type automatic conveying and grabbing mechanism; 710. a portal frame I; 720. a door frame II; 730. a gantry beam; 740. a sucker grabbing mechanism; 750. a proximity switch;

80. a tooling frame; 810. a frame top plate; 820. the frame foot board.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

Example 1

An arc reciprocating polishing apparatus, comprising: polishing fixture, swing mechanism and slewing mechanism, during the polishing, three kinds of mechanisms, mutually support. The rotating mechanism drives the part to rotate, the polishing mechanism drives the forming grinding tool to rotate and apply pressure, and the swinging mechanism 60 swings back and forth to polish the surface of the arc-shaped part 10; arc reciprocal burnishing device's top is provided with planer-type automatic transport and grabs mechanism 70, and frock frame 80 is installed to the below, planer-type automatic transport grabs mechanism 70 and includes portal I710, portal II 720 and portal crossbeam 730, portal I710 and the symmetrical both ends that set up at portal crossbeam 730 of II 720 to slidable mounting has the sucking disc that is used for snatching or placing the circular arc piece at the middle part of portal crossbeam 730 and grabs mechanism 740, the sucking disc snatchs the upper end of mechanism 740 and the upper end of portal I710 and portal II 720 all installs the proximity switch 750 that is used for automated inspection.

The polishing clamping mechanism consists of a polishing clamping mechanism I20 and a polishing clamping mechanism II 30 which are symmetrically arranged at two ends of the machine base; polishing fixture I20 includes: the three-jaw self-centering chuck comprises a speed-reducing motor I210, a grinding machine base I250 and a three-jaw self-centering chuck I280, wherein the speed-reducing motor I210 is connected with a bearing seat I270 through a connecting piece I220, one end of the connecting piece I220 penetrates through a bearing mounting plate I230 to be fixedly connected with the speed-reducing motor I210, the middle of the connecting piece I220 penetrates through the grinding machine base I250, and the other end of the connecting piece I220 penetrates through a bearing mounting plate II 260 to be fixedly connected with the bearing seat I270; the guide shaft I240 fixed between bearing mounting plate I230 and bearing mounting plate II 260 is inserted to the upper end of grinding machine seat I250, lower extreme fixed mounting is at the left end of frame 610, grinding machine seat I250 goes up and installs cylinder 26 in the below of guide shaft I240, three-jaw is from centering chuck I280, one end and bearing frame I270 fixed connection, the other end are connected with the shaping grinding apparatus I290 that is used for polishing convex part 10, specifically speaking, install dabber I21 through spherical area seat bearing 24 in the bearing frame I270, the one end of dabber I21 with three-jaw is from centering chuck I280 fixed connection, and the other end of dabber I21 is connected with the one end of dabber II 22 through chain coupling 23, the middle part of dabber II 22 is installed in grinding machine seat I250 through copper oilless bush 27, the other end of dabber II 22 is connected with the drive shaft of reduction motor I210 through copper oilless bush 27, when the speed reduction motor I210 is started, the mandrel II 22, the mandrel I21 and the forming grinding tool I290 fixedly connected with the three-jaw self-centering chuck I280 are driven to rotate, the arc-shaped part 10 is polished, meanwhile, the air cylinder 26 pushes to drive devices connected with the air cylinder to push together, the linear bearing 25 and the copper oil-free bushing 27 limit the position, and rotation and pressure pressing of the air cylinder are achieved.

The polishing clamping mechanism II 30 comprises a speed reducing motor II 310, a grinding machine base II 350 and a three-jaw self-centering chuck II 380, the speed reducing motor II 310 is fixedly connected with a bearing seat II 370 through a connecting piece II 320, one end of the connecting piece II 320 penetrates through a bearing mounting plate III 330 to be fixedly connected with the speed reducing motor II 310, the middle of the connecting piece II penetrates through the grinding machine base II 350, and the other end of the connecting piece II penetrates through a bearing mounting plate IV 360 to be fixedly connected with the bearing seat II 370; the upper end of the polishing machine base II 350 is inserted with a guide shaft II 340 fixed between the bearing mounting plate III 330 and the bearing mounting plate IV 360, the lower end of the polishing machine base II is fixedly mounted at the right end of the machine base 610, and an air cylinder is also mounted below the guide shaft II 340; one end of the three-jaw self-centering chuck II 380 is fixedly connected with the bearing seat II 370, and the other end of the three-jaw self-centering chuck II is connected with a forming grinding tool II 390 for grinding the arc-shaped part 10; the inside dabber and the shaft coupling that sets up of II 370 bearing frames are the same with above-mentioned I20 principle of polishing fixture, consequently when gear motor II 310 starts, can drive the three-jaw from II 380 and II 390 rotations of shaping grinding apparatus of centering chuck, make the shaping grinding apparatus can have wobbling surplus through the shaft coupling, just can closely laminate on the part surface when exerting pressure and pressing. This is unlike conventional designs where the coupling simply provides the effect of eliminating eccentricity. The polishing clamping mechanism I20 and the polishing clamping mechanism II 30 are symmetrically arranged, so that the effect of double-sided polishing of the circular arc-shaped part 10 can be achieved.

Swing mechanism 60, including frame 610, tray 620, bearing frame 630, platform board 640, gear motor IV 680 and connecting rod 683, platform board 640 includes integrated into one piece's well core plate 641 and edge board 642, the top center of frame 610 is installed and is born the weight of the clastic tray 620 of polishing, and both ends are installed respectively and are polished fixture I20 and polish fixture II 30, the below of frame 610 is connected with the well core plate 641 of platform board 640 through bearing frame 630, the below fixedly connected with of well core plate 641 alternates the area seat linear bearing 660 on guiding axle guide 650, area seat linear bearing 660 can drive the part above that and slide on guiding axle guide 650. The guide shaft guide 650 is provided with a baffle 670 at one end close to the tailstock assembly 40, the edge plate 642 of the platform plate 640 is fixedly connected with a helical gear reducer 681 of a reduction motor IV 680, and the upper part of the helical gear member 681 is connected with one end of a connecting rod 683 through a waist groove rotating disc 682, specifically: both ends of the connecting rod 683 are provided with rod end joint bearings 684, one end of the connecting rod 683 is fixedly connected with the waist groove rotating disc 682 through the rod end joint bearings 684, the rod end joint bearing 684 at the other end of the connecting rod 683 is fixedly connected with a grinding machine base II 350 in the polishing clamping mechanism II 30 through an angle piece plate 685, namely, the shaft of the rod end joint bearing 684 passes through a through hole at one end of the angle piece plate 685, so that the connecting rod 683 can horizontally rotate below the angle piece plate 685, and the other end of the angle piece plate 685 is fastened at the lower part of the side surface of the grinding machine base II 350 through screws (figure 4)

The rotating mechanism is arranged in a plane perpendicular to the polishing clamping mechanism, the rotating mechanism comprises a spindle assembly 50 and a tailstock assembly 40 symmetrical to the spindle assembly 50, and the spindle assembly 50 and the tailstock assembly 40 are arranged on a middle vertical line of the base 610. The spindle assembly 50 includes: the fixture comprises a chuck base 510, a speed reducing motor III 520, a three-jaw self-centering chuck III 540 and an angular contact bearing assembly I550, wherein the lower end of the chuck base 510 is fixedly installed on a tooling frame 80, the tooling frame 80 is a rectangular parallelepiped frame formed by mutually welding a transverse frame and a vertical frame, the upper end of the working frame 80 is welded with a frame top plate 810, and the lower end of the working frame 80 is welded with a frame foot plate 820; the speed reducing motor III 520 is fixedly connected with a three-jaw self-centering chuck III 540 through a connecting piece III 530, and the connecting piece III 530 is fixedly connected with the upper end of the chuck base 510 through an angular contact bearing assembly I550.

The tailstock assembly 40 comprises a manual tailstock 410 and a tailstock base 420, the manual tailstock 410 is fixedly connected with the tailstock base 420 through a bolt, the lower end of the tailstock base 420 is fixedly installed on the tooling frame 80 through a screw 440, a conical column handle 430 is arranged at the upper end of the screw 440, the lower end of the tailstock base 420 is a tailstock base bottom plate 421, and two ends of the tailstock base bottom plate 421 are fixedly provided with a linear bearing 660 with a seat, the middle of the linear bearing penetrates through the guide shaft guide rail 650.

The polishing device enables the arc-shaped part with high surface hardness to be polished without high-precision machine tool machining, and reduces the cost of the working procedure. Compared with a machine tool with high precision, the polishing machine has low requirement on knowledge storage of workers, and can be operated to polish more simply. Mechanical device, fixed form polishing, contrast workman's operation lathe processing is difficult to go wrong in the operation. Compared with machine tool machining, the machine tool machining method is easier to popularize, can realize large-batch machining more easily, and is high in efficiency. Two groups of forming grinding tools polish two sides, and the time consumption is little.

The working process is as follows: firstly, a forming grinding tool I290 and a forming grinding tool II 390 are respectively installed in chucks of a three-jaw self-centering chuck I280 and a three-jaw self-centering chuck II 380, then an arc-shaped part 10 penetrates through an installation shaft pin 110, one end of the installation shaft pin 110 is clamped by the three-jaw self-centering chuck III 540, the other end of the installation shaft pin is fixed by a conical column in a manual tailstock 410, motors are all electrically connected with a control system, other parts are installed manually, specifically, the three mechanisms comprise loading and unloading of a workpiece, jacking, clamping and grinding tool installation, the rotating speed of the motors and the swing amplitude are set, and during polishing, the three mechanisms are matched with each other. The part rotating mechanism drives the part to rotate, the polishing clamping mechanism drives the forming grinding tool to rotate and apply pressure, and the swinging mechanism swings back and forth. The surface of the arc-shaped part is polished, and the specific working process is as follows.

Polishing fixture I20 and the II 30 symmetry settings of polishing fixture in the polishing fixture, gear motor I210 rotates and drives II 22 rotations of dabber, and dabber II 22 drives I21 rotations of dabber by chain coupling 23, finally drives I290 rotations of shaping grinding apparatus, polishing circular arc piece surface. When the mandrel II 22 rotates, the mandrel I21 is limited by a copper oilless bushing 27, when the mandrel I21 rotates, the mandrel I21 is limited by a spherical bearing 24 with a seat, and the mandrel I21 can swing in a small amplitude due to the chain coupling 23, so that when the three-jaw self-centering chuck I280 clamps the forming grinding tool I290 to grind the arc-shaped part 10, the grinding tool can be tightly attached to the surface of the arc-shaped part 10 only by matching with a pressure applying mechanism. The air cylinder 26 pushes the bearing mounting plate II 260. The bearing mounting plate II 260 drives the guide shaft I240, the linear bearing 25 and the bearing mounting plate I230 to drive the mechanism thereon to move forwards strictly according to linear action when the guide shaft I240, the linear bearing 25 and the bearing mounting plate I230 are pushed. The upper mechanism of the device comprises a speed reduction motor I210 and a bearing seat I270. The thrust is transmitted to the three-jaw self-centering chuck I280, and the three-jaw self-centering chuck I280 clamps the forming grinding tool I290 and tightly presses the surface of the arc-shaped part 10. Realize the polishing of the force fit of pressing while rotating

A speed reduction motor IV 680 in the swing mechanism rotates to drive the waist groove rotating disc 682 to rotate and then drive the connecting rod 683 to swing in a reciprocating mode. The connecting rod 683 drives the polishing clamping mechanism I20 and the polishing clamping mechanism II 30 to swing back and forth around the center of the circular arc part 10.

An angular contact bearing assembly I550 in the rotating mechanism bears the weight of two sets of polishing clamping mechanisms and enables the polishing clamping mechanisms to rotate back and forth under the traction of a swinging mechanism, the angular contact bearing assembly is a bearing with an inclination, two bearings are combined and oppositely mounted, and can bear radial force and axial force when being used and rotate on the bearing. Two sets of polishing devices on the angular contact bearing assembly I550 can be pushed on the guide shaft guide rail 650, when the three-jaw self-centering chuck III 540 can clamp the arc-shaped part 10, the three-jaw self-centering chuck III 540 clamps the arc-shaped part 10, and the locking nut beside the angular contact bearing assembly I550 locks the position. The tailstock assembly 40 is pushed by the guide shaft guide 650 to tightly push the circular arc-shaped part 10, and then the tailstock assembly 40 is locked. The speed reduction motor III 520 rotates, and the three-jaw self-centering chuck III 540 rotates under the constraint of the angular contact bearing assembly I550.

In addition, in the description of the present invention, it is to be understood that the terms "central," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," and the like are used in an orientation or positional relationship indicated solely for the convenience of description and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore are not to be construed as limiting the invention.

The above description is only an example of the present invention, and the present invention is not limited thereto in any way, and those skilled in the art can make many variations and modifications to the technical solution of the present invention without departing from the technical solution of the present invention, and the technical solution of the present invention is protected by the appended claims.

Claims

1. An arc reciprocating polishing device, characterized in that, the arc reciprocating polishing device includes:

2. The circular arc reciprocating polishing device as claimed in claim 1, wherein the polishing clamping mechanism I comprises:

the upper end of the polishing machine base I is inserted with a guide shaft I fixed between the bearing mounting plate I and the bearing mounting plate II, and the lower end of the polishing machine base I is fixedly mounted at the left end of the polishing machine base I;

3. The circular arc reciprocating polishing device as claimed in claim 2, wherein a mandrel I is mounted in the bearing seat I through a spherical bearing with a seat, one end of the mandrel I is fixedly connected with a three-jaw self-centering chuck I, the other end of the mandrel I is connected with one end of a mandrel II through a chain coupling, the middle of the mandrel II is mounted in the polishing machine seat I through a copper sleeveless bush, and the other end of the mandrel II is connected with a driving shaft of a speed reduction motor I through the copper sleeveless bush.

4. The circular arc reciprocating polishing device as claimed in claim 1, wherein the polishing clamping mechanism II comprises:

5. The circular arc reciprocating burnishing apparatus of claim 1, wherein the spindle assembly comprises: chuck frame, gear motor III, three-jaw are from centering chuck III and angular contact bearing subassembly I, the lower extreme fixed mounting of chuck frame is on the frock frame, gear motor III passes through connecting piece III and three-jaw is from centering chuck III fixed connection, connecting piece III passes through the upper end fixed connection of angular contact bearing subassembly I and chuck frame.

6. The circular arc reciprocating burnishing apparatus of claim 1, wherein the tailstock assembly comprises: the manual tailstock and the tailstock base are fixedly connected through a bolt, the lower end of the tailstock base is fixedly installed on the tool framework through a screw, and a conical column handle is arranged at the upper end of the screw.

7. The circular arc reciprocating polishing device as claimed in claim 6, wherein the lower end of the tailstock base is a tailstock base bottom plate, and linear bearings with seats, the middle of which penetrates through the guide rail of the guide shaft, are fixedly installed at both ends of the tailstock base bottom plate.

8. The circular arc reciprocating polishing device according to claim 1, wherein a gantry type automatic conveying and grabbing mechanism is arranged above the circular arc reciprocating polishing device, a tooling frame is arranged below the circular arc reciprocating polishing device, the gantry type automatic conveying and grabbing mechanism comprises a gantry I, a gantry II and a gantry beam, the gantry I and the gantry II are symmetrically arranged at two ends of the gantry beam, and a sucker grabbing mechanism for grabbing or placing a circular arc piece is slidably arranged in the middle of the gantry beam.

9. The circular arc reciprocating polishing device as claimed in claim 8, wherein proximity switches for automatic detection are mounted at the upper end of the sucking disc grabbing mechanism and the upper ends of the gantry i and the gantry ii.

10. The circular arc reciprocating polishing device of claim 8, wherein the tool frame is a rectangular parallelepiped frame formed by welding a horizontal frame and a vertical frame, and a frame top plate is welded at the upper end of the working frame and a frame foot plate is welded at the lower end of the working frame.