CN114918798A

CN114918798A - Device and method for polishing front and back surfaces of watch case

Info

Publication number: CN114918798A
Application number: CN202210516179.0A
Authority: CN
Inventors: 袁巨龙; 孔佳骏; 张涛; 吕迅; 周见行
Original assignee: Xinchang Zhejiang University Of Technology Science And Technology Research Institute
Current assignee: Xinchang Zhejiang University Of Technology Science And Technology Research Institute
Priority date: 2022-05-12
Filing date: 2022-05-12
Publication date: 2022-08-19
Anticipated expiration: 2042-05-12
Also published as: CN114918798B

Abstract

The watch case front and back polishing device comprises a mounting bracket and a turntable, wherein the mounting bracket is provided with a mounting table, the turntable is arranged on the mounting table, and the turntable is connected with a cam divider; the rotary disc is fixedly provided with a watchcase clamping device which is uniformly distributed on the rotary disc along the circumferential direction, the watchcase clamping device comprises a clamping rod and a transmission gear, the transmission gear is fixed on the clamping rod and is connected with a dead axle gear train, and the dead axle gear train is connected with a driving motor; the other distribution of mount table has the throwing aureola device, and the throwing aureola device includes the mount pad, installs the polishing motor on the mount pad, and the distribution of polishing motor corresponds with watchcase clamping device's distribution. Correspondingly, the invention also provides a method for polishing the front and back surfaces of the watch case, and the polishing device and the polishing method provided by the invention have the advantages of high automation degree, high working efficiency and high polishing quality.

Description

Device and method for polishing front and back surfaces of watch case

Technical Field

The invention relates to a watch case polishing technology, in particular to a watch case front and back polishing device and a watch case front and back polishing method.

Background

With the development of social economy, the watch industry, particularly intelligent watches, is developed vigorously, and the quality requirement of people on watches is higher and higher, so that the watch is used as an ornament and has higher and higher surface quality requirement on a watch shell; at present, in the polishing process of watch cases, manual operation is often completed by an experienced master, misoperation is easy to occur during polishing, the polishing quality is difficult to ensure, the labor cost is high, and the production efficiency is low; therefore, the level of automation of watch case production is urgently required to be improved.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides the device and the method for polishing the front and back surfaces of the watch case, and the device and the method have the advantages of high automation degree, high working efficiency and high polishing quality.

For the polishing device, the technical scheme of the invention is as follows:

the watch case front and back polishing device comprises a mounting bracket and a turntable, wherein the mounting bracket is provided with a mounting table, the turntable is arranged on the mounting table, and the turntable is connected with a cam divider; the rotary disc is fixedly provided with a watchcase clamping device which is uniformly distributed on the rotary disc along the circumferential direction, the watchcase clamping device comprises a clamping rod and a transmission gear, the transmission gear is fixed on the clamping rod, the transmission gear is connected with a dead axle gear train, and the dead axle gear train is connected with a driving motor; a polishing wheel device is distributed beside the mounting table and comprises a mounting seat, the mounting seat is connected with the lead screw slider device, a polishing motor is mounted on the mounting seat and comprises a polishing motor A, a polishing motor B and a polishing motor C, and the distribution of the polishing motors corresponds to that of the watchcase clamping devices; a hemp wheel A is installed on a motor shaft of the polishing motor A, a wind wheel B is installed on a motor shaft of the polishing motor B, and a wind wheel C is installed on a motor shaft of the polishing motor C; the wind wheel B is inclined relative to the horizontal plane of the turntable, and the wind wheel C is vertical relative to the horizontal plane of the turntable.

The watch case front and back polishing device provided by the invention has the advantages of high automation degree, high working efficiency and high polishing quality, and is specifically represented as follows: during polishing, the watch shell is only required to be arranged on the watch shell clamping device, and subsequent polishing is automatically finished by the motor, so that the automation degree is high; during polishing, along with the rotation of the turntable, the hemp wheel A, the wind wheel B and the wind wheel C sequentially polish the watch case, the hemp wheel A can polish pockmarks of the watch case, the wind wheel can improve the brightness and remove scratches caused by the hemp wheel, wherein the wind wheel B can polish four corners of the watch case used for connecting the watch strap and can polish the groove between the watch dial and the watch strap, and the wind wheel C can integrally polish the watch dial case; three processing procedures can be completed on the turntable at one time without circulation on different polishing equipment, so that the working efficiency is high; in the polishing process, when the hemp wheel A, the wind wheel B and the wind wheel C rotate, the watch case positioned on the watch case clamping device can also be driven by the fixed-axis gear train and rotate, and the setting inclination angles of the wind wheel B and the wind wheel C are different, so that all parts of the watch case can be polished uniformly in all directions, and the polishing quality is high.

Preferably, in the device for polishing the front and back surfaces of the watch case, the watch case clamping device further comprises a shaft sleeve, the shaft sleeve is fixed on the turntable, and the clamping rod is arranged in the shaft sleeve through a bearing; the clamping rod comprises a positioning rod and a pull rod, the pull rod is positioned in a through hole in the positioning rod, and inclined planes matched with each other are arranged at the tail ends of the through hole and the pull rod; the tail end of the positioning rod is provided with a dividing groove and a watchcase mounting seat, the watchcase mounting seat is provided with a positioning cylindrical surface and a limiting surface, and the dividing groove is positioned in the watchcase mounting seat; a pressing block is mounted on the pull rod, a supporting spring is arranged between the pressing block and the pull rod, and an axial sliding pair is formed between the pressing block and the pull rod; a rocker arm seat is fixed on the turntable, a rocker arm is mounted on the rocker arm seat, the rocker arm and the rocker arm seat form a revolute pair, one end of the rocker arm is a pressure head, the other end of the rocker arm is a handle, and the pressure head is abutted to the pressing block; the tail end of the handle is provided with a pulley, the pulley is abutted to a disc of the mounting table, and a section of a slide way of the pulley on the disc is provided with an arc-shaped groove. The watchcase clamping device provided by the invention has the advantages of easiness in operation, reliability in clamping and simple structure, and is characterized in that: when the turntable rotates again, the pulley slides out of the arc-shaped groove, the handle is gradually tilted up and the pressure head presses the pressing block, so that the pull rod is pulled downwards, the tail end of the pull rod presses the watchcase mounting seat, the tail end of the watchcase mounting seat is expanded outwards, the watchcase is clamped, and the whole mounting process is easy to operate; when the pressure head is pressed on the pressure block, the supporting spring is in a pressing state, and the supporting spring can provide downward pretightening force for the pull rod, so that the watch case is prevented from loosening on the watch case mounting seat, and the watch case clamping device is reliably clamped; finally, the watch case clamping device has few components, simple structure and low manufacturing cost, and can be suitable for clamping watch cases of various sizes.

Preferably, in the device for polishing front and back surfaces of a watch case, the intermittent rotation angle of the rotary disc is 90 °, and the number of the watch case clamping devices is four. The carousel just can stop when every commentaries on classics 90 to the throwing aureola just can carry out abundant polishing to the cell-phone shell, and watchcase clamping device's quantity sets up to four, can be under the prerequisite of guaranteeing throwing optical efficiency, retrencies the structure of throwing aureola device, reduces manufacturing cost.

Preferably, in the watch case front and back polishing device, the lead screw sliding block device comprises a sliding seat, and a lead screw sliding block mechanism is mounted on the sliding seat; the mounting seat is mounted on a sliding block of the screw rod sliding block mechanism and forms a sliding pair with the sliding seat. The motor drives the lead screw to rotate, and then the slider can be driven to move on the sliding seat, so that the mounting seat moves relative to the sliding seat, and the height of the polishing motor can be conveniently adjusted. Further, the sliding seat and the mounting bracket form a revolute pair. Through the angle of adjusting the slide to the inclination to the motor is adjusted, thereby can adjust the inclination of throwing aureola, makes the polishing wheel device can adapt to the polishing of the watch case of different shapes.

Preferably, in the polishing device for the front and back surfaces of the watch case, the fixed-axis gear train includes a driving wheel, the driving motor and the driving wheel form transmission, driven wheels are uniformly installed on the turntable along the circumferential direction, the driving wheel is meshed with the driven wheels, and the driven wheels are meshed with the transmission gear. And one driving wheel drives a plurality of driven wheels to rotate, so that a plurality of transmission gears can be driven to rotate by one driving motor, and the transmission structure is simplified.

For the polishing method, the technical scheme of the invention is as follows:

a method for polishing the front and back surfaces of a watch case, which is implemented by using the device for polishing the front and back surfaces of the watch case; during polishing, the polishing motor A drives the hemp wheel A to rotate, the polishing motor B drives the wind wheel B to rotate, and the polishing motor C drives the wind wheel C to rotate; firstly, fixing a watch case on a clamping rod of a watch case clamping device, wherein the front surface of the watch case faces upwards, a driving motor drives a transmission gear to rotate through a dead axle gear train, and the transmission gear drives the watch case fixed on the clamping rod to rotate; then, the cam divider drives the turntable to rotate, when the watchcase clamping device reaches the position of the corresponding polishing wheel device, the watch case is stopped, the watch case is sequentially polished by a hemp wheel A, a wind wheel B and a wind wheel C, a hemp point of the watch case is polished by the hemp wheel A, four corners of the watch case are polished by the wind wheel B, and the watch case is integrally polished by the wind wheel C; and after the front surface of the watch case is polished, taking down the watch case from the watch case clamping device and installing the watch case again, enabling the back surface of the watch case to face upwards, and continuing to polish.

The method for polishing the front and back surfaces of the watch case, provided by the invention, also has the advantages of high automation degree, high working efficiency and high polishing quality, and is specifically characterized in that: during polishing, the watch shell is only required to be arranged on the watch shell clamping device, and subsequent polishing is automatically finished by the motor, so that the automation degree is high; during polishing, along with the rotation of the turntable, the hemp wheel A, the wind wheel B and the wind wheel C sequentially polish the watch case, the hemp wheel A can polish pockmarks of the watch case, the wind wheel can improve the brightness and remove scratches caused by the hemp wheel, wherein the wind wheel B can polish four corners of the watch case used for connecting the watch strap and can polish the groove between the watch dial and the watch strap, and the wind wheel C can integrally polish the watch dial case; three processing procedures can be completed on the turntable at one time without circulation on different polishing equipment, so that the working efficiency is high; in the polishing process, when the hemp wheel A, the wind wheel B and the wind wheel C rotate, the watch case positioned on the watch case clamping device can also be driven by the ordinary gear train and rotate, and the setting inclination angles of the wind wheel B and the wind wheel C are different, so that all parts of the watch case can be polished uniformly in all directions, and the polishing quality is high.

Preferably, in the method for polishing the front and back surfaces of the watch case, after the polishing device polishes and polishes for a period of time, the screw rod of the screw rod sliding block device performs micron-level feeding motion to compensate the positions of the hemp wheel A, the wind wheel B and the wind wheel C. Because abrasion can appear in the process of polishing by the hemp wheel and the wind wheel, the position compensation is carried out through the feeding motion of the screw rod, and the polishing quality can be ensured.

Preferably, in the method for polishing the front and back surfaces of the watch case, the lead screw slider device is provided with a position sensor, the position sensor records the position and is provided with a positive limit, an original point and a negative limit, and when the measured position exceeds the positive limit or the negative limit, a motor of the lead screw slider device stops rotating and gives an alarm. After the alarm is given, the operating personnel can judge and adjust the working state of the polishing wheel device.

Preferably, in the method for polishing the front and back surfaces of the watch case, the number of the watch case clamping devices is four, the dial stops when rotating 90 degrees, and after the dial stops, the polished watch case is taken off from the watch case mounting base and a new watch case is mounted. Watchcase clamping device's quantity sets up to four, can simplify the structure of throwing aureola device under the prerequisite of guaranteeing throwing optical efficiency, reduces manufacturing cost.

Drawings

FIG. 1 is a plan view of a device for polishing the front and back surfaces of a watch case according to the present invention;

FIG. 2 is an axial view of the watch case with the polishing wheel assembly removed;

FIG. 3 is an axial view of components at the turntable;

FIG. 4 is an axial view of the turntable;

FIG. 5 is an axial view of the polishing wheel assembly;

figure 6 is an axial view of a watch case gripping device;

figure 7 is a front view of the watchcase clasp assembly;

FIG. 8 is a sectional view taken along line A-A of FIG. 7;

figure 9 is a schematic view of the mounting of the watch case;

figure 10 is an axial view of a watch case;

figure 11 is a schematic view of rotor B polishing the watch case;

fig. 12 is a schematic view of the rotor C polishing the watch case.

Detailed Description

The invention will be further described with reference to the following drawings and specific examples, which are not intended as a limitation on the invention.

Example (see fig. 1-12):

the device for polishing the front and back surfaces of the watch case comprises a mounting bracket 2 and a turntable 3, wherein a mounting table 4 is arranged on the mounting bracket 2, the turntable 3 is arranged on the mounting table 4, and the turntable 3 is connected with a cam divider 5; the rotary disc 3 is fixedly provided with a watchcase clamping device 1, the watchcase clamping devices 1 are uniformly distributed on the rotary disc 3 along the circumferential direction, the watchcase clamping device 1 comprises a clamping rod 101 and a transmission gear 102, the transmission gear 102 is fixed on the clamping rod, the transmission gear 102 is connected with a dead axle gear train 6, and the dead axle gear train 6 is connected with a driving motor 7; a polishing wheel device 8 is distributed beside the mounting table 4, the polishing wheel device 8 comprises a mounting seat 801, the mounting seat 801 is connected with a screw rod sliding block device 802, a polishing motor 803 is mounted on the mounting seat 801, the polishing motor 803 comprises a polishing motor A803A, a polishing motor B803B and a polishing motor C803C, and the distribution of the polishing motor 803 corresponds to that of the watchcase clamping device 1; a hemp wheel A804 is installed on a motor shaft of the polishing motor A803A, a wind wheel B805 is installed on a motor shaft of the polishing motor B803B, and a wind wheel C806 is installed on a motor shaft of the polishing motor C803C; the wind wheel B805 is inclined relative to the horizontal plane of the rotating disc 3, and the wind wheel C806 is vertical relative to the horizontal plane of the rotating disc 3.

During polishing, the polishing motor A803A drives the hemp wheel A804 to rotate, the polishing motor B803B drives the wind wheel B805 to rotate, and the polishing motor C803C drives the wind wheel C806 to rotate; firstly, fixing a watch case 9 on a clamping rod 101 of a watch case clamping device 1, wherein the front surface of the watch case 9 faces upwards, a driving motor 7 drives a transmission gear 102 to rotate through a dead axle gear train 6, and the transmission gear 102 drives the watch case 9 fixed on the clamping rod 101 to rotate; subsequently, the cam divider 5 drives the turntable 3 to rotate, when the watch case clamping device 1 reaches the position of the corresponding polishing wheel device 8, the watch case 9 is stopped, the watch case 9 is sequentially polished by the hemp wheel a804, the wind wheel B805 and the wind wheel C806, the hemp wheel a804 polishes pits of the watch case 9, the wind wheel B805 polishes four corners of the watch case 9 (as shown in fig. 11), and the wind wheel C806 polishes the whole dial case (as shown in fig. 12); after the polishing wheel device 8 polishes and polishes for a period of time, the screw rod of the screw rod sliding block device 802 performs micron-level feeding motion, and performs position compensation on the hemp wheel A804, the wind wheel B805 and the wind wheel C806; after the front surface of the watch case 9 is finished, the watch case 9 is removed from the case clamping device 1 and mounted again so that the back surface of the watch case 9 faces upward, and the grinding and polishing are continued.

In this embodiment, the case clasp 1 further comprises a boss 103, the boss 103 being fixed to the rotary plate 3, the clasp rod 101 being mounted in the boss 103 via a bearing 104; the clamping rod 101 comprises a positioning rod 101A and a pull rod 101B, the pull rod 101B is positioned in a through hole in the positioning rod 101A, and inclined surfaces 101C matched with each other are arranged at the tail ends of the through hole and the pull rod 101B; a dividing groove 101D and a watchcase installation seat 101E are arranged at the tail end of the positioning rod 101A, a positioning cylindrical surface 101F and a limiting surface 101G are arranged on the watchcase installation seat 101E, and the dividing groove 101D is positioned in the watchcase installation seat 101E; a pressing block 105 is mounted on the pull rod 101B, a supporting spring 106 is arranged between the pressing block 105 and the pull rod 101B, and an axial sliding pair is formed between the pressing block 105 and the pull rod 101B; a rocker arm seat 107 is fixed on the turntable 3, a rocker arm 108 is mounted on the rocker arm seat 107, the rocker arm 108 and the rocker arm seat 107 form a rotating pair, one end of the rocker arm 108 is provided with a pressure head 108A, the other end of the rocker arm 108 is provided with a handle 108B, and the pressure head 108A abuts against the pressing block 105; the tail end of the handle 108B is provided with a pulley 109, the pulley 109 abuts against a disc 401 of the mounting table 4, and a section of a slide way of the pulley 109 on the disc 401 is provided with an arc-shaped groove 402. The watch case clamping device has the advantages of easiness in operation, reliability in clamping and simple structure.

In the present embodiment, the intermittent rotation angle of the dial 3 is 90 °, and the number of the case clasp 1 is four. Carousel 3 just can stop when rotating 90 to the throwing aureola just can carry out abundant polishing to hand watchcase 9, and watchcase clamping device 1's quantity sets up to four, can simplify the structure of throwing aureola device 8 under the prerequisite of guaranteeing polishing efficiency, reduces manufacturing cost.

In this embodiment, the lead screw slider device 802 includes a sliding base 802A, and a lead screw slider mechanism is mounted on the sliding base 802A; the mounting seat 801 is mounted on a slide block 802B of the lead screw slide block mechanism, and forms a slide pair with the slide base 802A. The motor drives the lead screw to rotate, so that the slider 802B can be driven to move on the sliding base 802A, the mounting base 801 is enabled to move relative to the sliding base 802A, and the height of the polishing motor 803 can be adjusted conveniently. Further, the sliding base 802A and the mounting bracket form a rotation pair. Through the angle of adjusting slide 802A to the inclination to the motor is adjusted, thereby can adjust the inclination of throwing aureola, makes throwing aureola device 8 can adapt to the polishing of the watch case of different shapes.

In this embodiment, the fixed-axis gear train 6 includes a driving wheel 601, the driving motor 7 forms transmission with the driving wheel 601, driven wheels 602 are uniformly installed on the rotary disc 3 along the circumferential direction, the driving wheel 601 is meshed with the driven wheels 602, and the driven wheels 602 are meshed with the transmission gear 102. Due to the arrangement of the fixed-axis gear train 6, one driving wheel 601 drives a plurality of driven wheels 602 to rotate, so that a plurality of transmission gears 102 can be driven to rotate by one driving motor 7, and the transmission structure is simplified.

In this embodiment, a position sensor is installed on the lead screw slider device 802, the position sensor records the position, and sets a positive limit, an original point, and a negative limit, and when the measured position exceeds the positive limit or the negative limit, the motor of the lead screw slider device 802 stops rotating and gives an alarm. After the alarm is given, the operator can judge and adjust the working state of the polishing wheel device 8.

Claims

1. Watch case positive and negative burnishing device, its characterized in that: the cam divider comprises a mounting bracket (2) and a rotary table (3), wherein the mounting bracket (2) is provided with a mounting table (4), the rotary table (3) is arranged on the mounting table (4), and the rotary table (3) is connected with a cam divider (5); the rotary table (3) is fixedly provided with a watchcase clamping device (1), the watchcase clamping device (1) is uniformly distributed on the rotary table (3) along the circumferential direction, the watchcase clamping device (1) comprises a clamping rod (101) and a transmission gear (102), the transmission gear (102) is fixed on the clamping rod, the transmission gear (102) is connected with a fixed-shaft gear train (6), and the fixed-shaft gear train (6) is connected with a driving motor (7); polishing wheel devices (8) are distributed beside the mounting table (4), each polishing wheel device (8) comprises a mounting seat (801), each mounting seat (801) is connected with a lead screw slider device (802), each mounting seat (801) is provided with a polishing motor (803), each polishing motor (803) comprises a polishing motor A (803A), a polishing motor B (803B) and a polishing motor C (803C), and the distribution of the polishing motors (803) corresponds to the distribution of the watchcase clamping devices (1); a hemp wheel A (804) is installed on a motor shaft of the polishing motor A (803A), a wind wheel B (805) is installed on a motor shaft of the polishing motor B (803B), and a wind wheel C (806) is installed on a motor shaft of the polishing motor C (803C); the wind wheel B (805) is inclined relative to the horizontal plane of the rotary table (3), and the wind wheel C (806) is vertical relative to the horizontal plane of the rotary table (3).

2. A watch case obverse and reverse polishing device according to claim 1, wherein: the watchcase clamping device (1) further comprises a shaft sleeve (103), the shaft sleeve (103) is fixed on the rotary disc (3), and the clamping rod (101) is installed in the shaft sleeve (103) through a bearing (104); the clamping rod (101) comprises a positioning rod (101A) and a pull rod (101B), the pull rod (101B) is located in a through hole in the positioning rod (101A), and inclined surfaces (101C) which are matched with each other are arranged at the tail ends of the through hole and the pull rod (101B); the tail end of the positioning rod (101A) is provided with a dividing groove (101D) and a watchcase installation seat (101E), the watchcase installation seat (101E) is provided with a positioning cylindrical surface (101F) and a limiting surface (101G), and the dividing groove (101D) is positioned in the watchcase installation seat (101E); a pressing block (105) is mounted on the pull rod (101B), a supporting spring (106) is arranged between the pressing block (105) and the pull rod (101B), and an axial sliding pair is formed between the pressing block (105) and the pull rod (101B); a rocker arm seat (107) is fixed on the turntable (3), a rocker arm (108) is mounted on the rocker arm seat (107), the rocker arm (108) and the rocker arm seat (107) form a revolute pair, one end of the rocker arm (108) is provided with a pressure head (108A), the other end of the rocker arm (108) is provided with a handle (108B), and the pressure head (108A) is abutted to the pressing block (105); the tail end of the handle (108B) is provided with a pulley (109), the pulley (109) is abutted to a disc (401) of the mounting table (4), and a section of a slide way of the pulley (109) on the disc (401) is provided with an arc-shaped groove (402).

3. A watch case obverse and reverse polishing device according to claim 1, wherein: the intermittent rotation angle of the rotary disc (3) is 90 degrees, and the number of the watchcase clamping devices (1) is four.

4. A watch case obverse and reverse polishing device according to claim 1, wherein: the lead screw sliding block device (802) comprises a sliding seat (802A), and a lead screw sliding block mechanism is arranged on the sliding seat (802A); the mounting seat (801) is mounted on a sliding block (802B) of the screw rod sliding block mechanism and forms a sliding pair with the sliding seat (802A).

5. The device for polishing front and back surfaces of a watch case according to claim 4, wherein: the sliding seat (802A) and the mounting bracket form a revolute pair.

6. A watch case obverse and reverse polishing device according to claim 1, wherein: the dead axle gear train (6) comprises a driving wheel (601), the driving motor (7) and the driving wheel (601) form transmission, driven wheels (602) are uniformly arranged on the rotary disc (3) along the circumferential direction, the driving wheel (601) is meshed with the driven wheels (602), and the driven wheels (602) are meshed with the transmission gear (102).

7. The method for polishing the front and back surfaces of the watch case is characterized in that: the polishing method uses the polishing device for the front and back surfaces of the watch case as claimed in claim 1, during polishing, a polishing motor A (803A) drives a hemp wheel A (804) to rotate, a polishing motor B (803B) drives a wind wheel B (805) to rotate, and a polishing motor C (803C) drives a wind wheel C (806) to rotate; firstly, fixing a watch case (9) on a clamping rod (101) of a watch case clamping device (1), wherein the front surface of the watch case (9) faces upwards, a driving motor (7) drives a transmission gear (102) to rotate through a dead axle gear train (6), and the transmission gear (102) drives the watch case (9) fixed on the clamping rod (101) to rotate; then, the cam divider (5) drives the turntable (3) to rotate, when the watchcase clamping device (1) reaches the position of the corresponding polishing wheel device (8), the watch case (9) stops, the watch case is sequentially polished by the hemp wheel A (804), the wind wheel B (805) and the wind wheel C (806), the hemp wheel A (804) polishes pits of the watch case (9), the wind wheel B (805) polishes four corners of the watch case (9), and the wind wheel C (806) integrally polishes the watch case; after the front surface of the watch case (9) is polished, the watch case (9) is taken down from the watch case clamping device (1) and is installed again, the back surface of the watch case (9) faces upwards, and grinding and polishing are continuously carried out.

8. The method of polishing front and back surfaces of watch case according to claim 7, characterized in that: after the polishing wheel device (8) polishes and polishes for a period of time, the lead screw of the lead screw slider device (802) performs micron-level feeding motion, and position compensation is performed on the hemp wheel A (804), the wind wheel B (805) and the wind wheel C (806).

9. The method of polishing front and back surfaces of watch case according to claim 7, characterized in that: the lead screw slider device (802) is provided with a position sensor, the position sensor records the position and is provided with a positive limit, an original point and a negative limit, and when the measured position exceeds the positive limit or the negative limit, a motor of the lead screw slider device (802) stops rotating and gives an alarm.

10. The method of polishing front and back surfaces of a watch case according to claim 7, wherein: the number of the watchcase clamping devices (1) is four, the turnplate (3) stops when rotating for 90 degrees, and after the turnplate (3) stops, the polished watchcase (9) is taken down from the watchcase mounting seat (101E) and a new watchcase is mounted.