Wristwatch double-end grinding and polishing machine

Abstract

The utility model provides a wristwatch double-head grinding and polishing machine which comprises a machine table, a polishing device is arranged on the machine table, the two ends of the polishing device are both provided with grinding ends, two watch cover clamping assemblies are arranged on the machine table, the two watch cover clamping assemblies are located on one sides of the two grinding ends respectively, and the two watch cover clamping assemblies are located on the other sides of the two grinding ends respectively. The meter cover clamping assembly is provided with a clamping air cylinder, clamp positioning rails are arranged on the two sides of the output end of the clamping air cylinder, symmetrical clamping block sets are arranged on the two clamp positioning rails respectively, each clamping block set is composed of a left half clamp and a right half clamp, and the left half clamps and the right half clamps are fixed to the clamp positioning rails through adjusting bolts to achieve relative sliding adjustment. The ends, facing each other, of the inner sides of the left half clamp and the right half clamp are each provided with an arc-shaped face matched with the outline of a wristwatch cover, so that the wristwatch cover is clamped between the two clamping block sets. The utility model relates to the technical field of watch cover polishing.

Description

Technical Field

[0001] The utility model relates to the technical field of watch cover polishing, in particular to a double-head grinding and polishing machine for wristwatches. Background Art

[0002] In the traditional watch manufacturing industry, the polishing process of watch covers is mostly done manually, which is a job that requires high skills and experience. The advantage of manual polishing is that the polishing technique and strength can be flexibly adjusted according to different materials, complex structures and the unique requirements of designers to ensure that each watch cover presents a unique gloss and texture. However, this traditional method has significant limitations and challenges: first, manual polishing is inefficient and labor costs are high; second, due to the influence of human factors, the consistency and accuracy of product quality are difficult to be fully guaranteed; third, long-term manual labor can easily lead to worker fatigue, thus affecting polishing quality and production progress.

[0003] With the development of automation technology, some watch companies have begun to try to use mechanized polishing equipment to replace some manual operations. Although the existing single-head or multi-head polishing machines can improve production efficiency to a certain extent, they still face many problems in practical applications. For example, it is often difficult to accurately control the polishing force during mechanical polishing, which can easily cause excessive or insufficient polishing, damage the material of the watch cover and even affect the appearance quality of the final product. In addition, the polishing fixtures of most polishing machines on the market are not compatible with watch covers of different types and sizes, making it difficult to achieve flexible and efficient conversion and adaptation.

[0004] Therefore, it is imperative to redesign a double-head grinding and polishing machine for watches. Utility Model Content

[0005] In view of the defects of the above-mentioned prior art, the utility model provides a double-head grinding and polishing machine for watches, aiming to solve the problems of low polishing efficiency, difficult quality assurance, and incompatibility of the polishing fixture with various types of watches in the prior art watch cover polishing process.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a double-head grinding and polishing machine for watches, including a machine platform, a polishing device is arranged on the machine platform, and grinding ends are arranged at both ends of the polishing device, two watch cover clamping assemblies are arranged on the machine platform, the two watch cover clamping assemblies are respectively located on one side of the two grinding ends, the watch cover clamping assembly is provided with a clamping cylinder, and fixture positioning rails are arranged on both sides of the output end of the clamping cylinder, and mutually symmetrical clamping block groups are respectively arranged on the two clamp positioning rails, the clamping block groups are composed of a left half clamp and a right half clamp, and are fixed on the clamp positioning rails by adjusting bolts to realize relative sliding adjustment, the inner ends of the left half clamp and the right half clamp facing each other are provided with arc surfaces adapted to the contour of the watch cover, so that the watch cover is clamped between the two clamping block groups, and the adjusting bolt adjusts the relative distance between the left half clamp and the right half clamp to adapt to watch covers of different sizes.

[0007] Furthermore, the cover clamping assembly is also provided with a longitudinal displacement component, and a telescopic cylinder is provided on the longitudinal displacement component, and the output end of the telescopic cylinder is connected to the clamping cylinder.

[0008] Based on the above, the beneficial effect of a double-headed grinding and polishing machine for watches is to solve the problems of low polishing efficiency, difficult quality assurance, and incompatibility of the polishing fixture for various types of watches in the prior art watch cover polishing process; mainly reflected in: the watch cover clamping assembly of the utility model realizes precise positioning and clamping of the watch cover through the longitudinal displacement component in cooperation with the telescopic cylinder and the clamping cylinder, wherein the clamping block group (including the left half clamp and the right half clamp) at the output end of the clamping cylinder can be flexibly adjusted according to the different sizes of the watch cover through the adjusting bolts located on the clamp positioning rail, ensuring good adaptability to various types of watch covers, the arc surface design on the inner side of the clamping block group can fit the contour of the watch cover tightly, avoiding unnecessary stress and damage during the polishing process, thereby effectively ensuring the quality of the watch cover after polishing, and the watch cover clamping assembly can perform fully automatic polishing of the watch cover on both sides of the polishing device, which greatly increases the polishing efficiency; the beneficial effect of the polishing device is to provide a double-head polishing function, which can process two watch covers at the same time, greatly improving work efficiency; The beneficial effect of the watch cover clamping assembly is that it ensures the stability during the polishing process by firmly clamping the watch cover, and prevents the watch cover from shifting or vibrating during the polishing process; the beneficial effect of the longitudinal displacement component is that it allows the telescopic cylinder to move accurately in the vertical direction, which is convenient for polishing the watch cover on the clamping cylinder; the beneficial effect of the telescopic cylinder is that it provides power for the clamping cylinder so that it can be extended and retracted as needed to adapt to the changes in the size of the watch cover for polishing at the grinding end; the beneficial effect of the clamping cylinder is that it controls the opening and closing action of the clamp block group through the clamp positioning rail to achieve the clamping and release of the watch cover; the beneficial effect of the clamp positioning rail is that it guides the moving trajectory of the left half clamp and the right half clamp, ensures that the clamping action is smooth and accurate, and supports the fine adjustment of the spacing between the clamp block groups; the beneficial effect of the clamp block group is that it cooperates to form a clamping space that adapts to the contour of the watch cover, and the design of the inner arc surface is conducive to reducing local stress during polishing and protecting the watch cover from being squeezed and deformed; the beneficial effect of the adjusting bolt is that it can adapt to watch covers of different sizes by fine-tuning the distance between the clamp block groups, thereby enhancing the versatility and applicability of the equipment.

[0009] Furthermore, the machine is also provided with a feeding assembly and two bidirectional watch cover conveying assemblies, the feeding assembly is arranged above the polishing device, and the two bidirectional watch cover conveying assemblies are respectively arranged on both sides of the machine, and are respectively used for loading and unloading the watch covers, the feeding assembly is provided with a conveying motor, a conveying screw, two telescopic electric cylinders and two suction cup cylinders, the conveying screw is arranged at the output end of the conveying motor, the two telescopic electric cylinders are respectively symmetrically arranged at the two ends of the conveying screw through two connecting blocks, and the two suction cup cylinders are respectively arranged at the output ends of the two telescopic electric cylinders.

[0010] Based on the above, the beneficial effect of the feeding assembly is to realize automatic transportation of the watch cover, reduce manual operation, and improve the automation level of the production line; the beneficial effect of the two-way watch cover conveying assembly is to ensure efficient and orderly feeding and discharging of the watch cover before and after polishing; the beneficial effect of the conveying motor is to drive the conveying screw; the beneficial effect of the conveying screw is to drive the relative displacement of the two telescopic electric cylinders through the connecting block; the beneficial effect of the telescopic electric cylinder is to drive the suction cup cylinder to convey the watch cover; the beneficial effect of the suction cup cylinder is to adsorb the watch cover and transfer it to the clamping cylinder of the watch cover clamping assembly.

[0011] Furthermore, the bidirectional watch cover conveying assembly includes a conveying platform, a feeding conveyor belt and a discharging conveyor belt. The feeding conveyor belt and the discharging conveyor belt are both arranged at the upper end of the conveying platform, and the feeding conveyor belt and the discharging conveyor belt run in opposite directions. Watch cover positioning grooves are evenly distributed on the feeding conveyor belt and the discharging conveyor belt, and the watch cover is arranged in the watch cover positioning grooves.

[0012] Based on the above, the beneficial effect of the conveyor table is to install the feeding conveyor belt and the discharging conveyor belt; the beneficial effect of the feeding conveyor belt is to convey the unpolished watch covers; the beneficial effect of the discharging conveyor belt is to convey the polished watch covers to the next process; the beneficial effect of the watch cover positioning groove is to install the watch cover.

[0013] Furthermore, a cover detection sensor is provided at one end of the conveying platform close to the feeding assembly, and the cover detection sensor includes two infrared transmitters and a double-headed infrared receiver, the two infrared transmitters are respectively arranged on the outsides of the feeding conveyor belt and the discharging conveyor belt, and are located on the same straight line with the two cover positioning grooves on the feeding conveyor belt and the discharging conveyor belt which are closest to the feeding assembly, and the double-headed infrared receiver is located between the two cover positioning grooves.

[0014] Based on the above, the beneficial effect of the watch cover detection sensor is to monitor the position and status of the watch cover in real time, ensuring the precise control of the polishing process and the smooth progress of the automation process.

[0015] Furthermore, two waste chip grooves are provided on the upper end surface of the machine, and the two waste chip grooves are symmetrically arranged below the grinding end. A waste chip box is adapted to be arranged in each of the waste chip grooves. Two closed doors are provided at the front end of the machine, and each of the waste chip boxes is slidably connected to the waste chip groove from the two closed doors.

[0016] Based on the above, the beneficial effect of the waste chip trough is to install the waste chip box; the beneficial effect of the waste chip box is to load polishing waste chips; the beneficial effect of the closed door is to limit the waste chip box in the waste chip trough.

[0017] Furthermore, the longitudinal displacement component is provided with a displacement motor, a displacement screw and a displacement guide rail, the displacement screw is arranged at the output end of the displacement motor, the telescopic cylinder is arranged on the displacement screw through a guide block, and the guide block is slidably fitted on the displacement guide rail.

[0018] Based on the above, the beneficial effect of the displacement motor is to drive the displacement screw; the beneficial effect of the displacement screw is to drive the longitudinal displacement of the telescopic cylinder through the guide block; the beneficial effect of the displacement guide rail is to guide the displacement direction of the telescopic cylinder.

[0019] Furthermore, the polishing device includes a double-headed polishing motor and two polishing grinding wheels, and the two polishing grinding wheels are respectively arranged on two output ends of the double-headed polishing motor.

[0020] Based on the above, the beneficial effect of the double-head polishing motor is to drive the polishing wheels on the two output ends; the beneficial effect of the polishing wheels is to polish the surface of the watch.

[0021] Furthermore, a controller is provided in the middle of the machine, and the double-head polishing motor, the displacement motor, the cover detection sensor, the feeding conveyor belt, the discharging conveyor belt, the conveying motor, the telescopic electric cylinder, the suction cup cylinder, the telescopic cylinder and the clamping cylinder are all connected to the controller via electrical signals.

[0022] Based on the above, the beneficial effect of the controller is to connect various components through electrical signals, realize functions such as parameter setting, automatic control and data monitoring, and ensure that the polishing machine runs efficiently, stably and accurately.

[0023] In order to more clearly illustrate the above features of the present invention and the objectives to be achieved, the present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 : is a schematic diagram of the utility model;

[0025] Figure 2 : It is a partial schematic diagram of the bidirectional cover transmission assembly of the utility model;

[0026] Figure 3 : It is a side view of the cover clamping assembly, the waste chip trough and the waste chip box of the utility model;

[0027] Figure 4 : It is a side view of the clamping cylinder of the utility model;

[0028] Figure 5 : It is a schematic diagram of the clamping surface of the clamping cylinder of the utility model;

[0029] Figure 6 : It is a schematic diagram of the clamping surface when the clamping cylinder of the utility model does not clamp the watch cover.

[0030] Description of the attached figures: 10-watch cover, 1-machine table, 11-waste trough, 12-waste box, 13-closed door, 2-polishing device, 21-double-head polishing motor, 22-polishing grinding wheel, 3-watch cover clamping assembly, 31-longitudinal displacement component, 311-displacement motor, 312-displacement screw rod, 313-displacement guide rail, 32-telescopic cylinder, 33-clamping cylinder, 331-clamp positioning rail, 332-clamp block group, 3321-left Half clamp, 3322-right half clamp, 3323-arc surface, 333-adjusting bolt, 4-feeding assembly, 41-transmission motor, 42-transmission screw, 43-telescopic electric cylinder, 44-suction cup cylinder, 5-bidirectional cover transmission assembly, 51-transmission table, 52-feeding conveyor belt, 53-discharging conveyor belt, 54-cover positioning slot, 55-cover detection sensor, 551-infrared transmitter, 552-double-headed infrared receiver, 6-controller. DETAILED DESCRIPTION

[0031] like Figure 1-Figure 6 As shown, a double-head grinding and polishing machine for wristwatches comprises a machine platform 1, on which a polishing device 2 is arranged, and both ends of the polishing device 2 are provided with grinding ends, the machine platform 1 is provided with two watch cover clamping assemblies 3, the two watch cover clamping assemblies 3 are respectively located on one side of the two grinding ends, the watch cover clamping assembly 3 is provided with a clamping cylinder 33, both sides of the output end of the clamping cylinder 33 are provided with fixture positioning rails 331, and the two fixture positioning rails 331 are respectively provided with mutually symmetrical clamping block groups 332, the The clamp block group 332 consists of a left half clamp 3321 and a right half clamp 3322, and is fixed on the clamp positioning rail 331 by an adjusting bolt 333 to achieve relative sliding adjustment. The inner ends of the left half clamp 3321 and the right half clamp 3322 facing each other are provided with an arc surface 3323 that is adapted to the contour of the watch cover 10, so that the watch cover 10 is clamped between the two clamp block groups 332. The adjusting bolt 333 adjusts the relative distance between the left half clamp 3321 and the right half clamp 3322 to adapt to watch covers 10 of different sizes.

[0032] The cover clamping assembly 3 is also provided with a longitudinal displacement component 31, and a telescopic cylinder 32 is provided on the longitudinal displacement component 31, and the output end of the telescopic cylinder 32 is connected to the clamping cylinder 33. The cover clamping assembly 3 is also provided with a longitudinal displacement component 31, and a telescopic cylinder 32 is provided on the longitudinal displacement component 31, and the output end of the telescopic cylinder 32 is connected to the clamping cylinder 33.

[0033] The machine 1 is also provided with a feeding component 4 and two bidirectional watch cover conveying components 5. The feeding component 4 is arranged above the polishing device 2. The two bidirectional watch cover conveying components 5 are respectively arranged on both sides of the machine 1, and are respectively used for loading and unloading the watch cover 10. The feeding component 4 is provided with a conveying motor 41, a conveying screw rod 42, two telescopic electric cylinders 43 and two suction cup cylinders 44. The conveying screw rod 42 is arranged at the output end of the conveying motor 41. The two telescopic electric cylinders 43 are symmetrically arranged at the two ends of the conveying screw rod 42 through two connecting blocks. The two suction cup cylinders 44 are respectively arranged at the output ends of the two telescopic electric cylinders 43.

[0034] The bidirectional watch cover conveying assembly 5 includes a conveying platform 51, a feeding conveyor belt 52 and a discharging conveyor belt 53. The feeding conveyor belt 52 and the discharging conveyor belt 53 are both arranged at the upper end of the conveying platform 51, and the feeding conveyor belt 52 and the discharging conveyor belt 53 run in opposite directions. Watch cover positioning grooves 54 are evenly distributed on the feeding conveyor belt 52 and the discharging conveyor belt 53, and the watch cover 10 is arranged in the watch cover positioning grooves 54.

[0035] A cover detection sensor 55 is provided at one end of the conveying platform 51 close to the feeding component 4, and the cover detection sensor 55 includes two infrared transmitters 551 and a double-headed infrared receiver 552. The two infrared transmitters 551 are respectively arranged on the outer sides of the feeding conveyor belt 52 and the discharging conveyor belt 53, and are located on the same straight line with the two cover positioning grooves 54 on the feeding conveyor belt 52 and the discharging conveyor belt 53 which are closest to the feeding component 4, and the double-headed infrared receiver 552 is located between the two cover positioning grooves 54.

[0036] The upper end surface of the machine 1 is also provided with two waste chip grooves 11, and the two waste chip grooves 11 are symmetrically arranged below the grinding end. Two waste chip boxes 12 are arranged in the machine 1, and two closed doors 13 are arranged at the front end of the machine 1. The two waste chip boxes 12 are slidably connected to the two closed doors 13 respectively.

[0037] The longitudinal displacement component 31 is provided with a displacement motor 311, a displacement screw 312 and a displacement guide rail 313. The displacement screw 312 is arranged at the output end of the displacement motor 311, and the telescopic cylinder 32 is arranged on the displacement screw 312 through a guide block, and the guide block is slidably fitted on the displacement guide rail 313.

[0038] The polishing device 2 includes a double-headed polishing motor 21 and two polishing grinding wheels 22 . The two polishing grinding wheels 22 are respectively arranged on two output ends of the double-headed polishing motor 21 .

[0039] A controller 6 is provided in the middle of the machine 1, and the double-head polishing motor 21, the displacement motor 311, the cover detection sensor 55, the feeding conveyor belt 52, the discharging conveyor belt 53, the conveying motor 41, the telescopic electric cylinder 43, the suction cup cylinder 44, the telescopic cylinder 32 and the clamping cylinder 33 are all connected to the controller 6 via electrical signals.

[0040] In summary, the specific implementation of the utility model is as follows: first, before starting the equipment, according to the size of the watch cover to be processed, since the adjusting bolt 333 is sleeved in the fixture positioning rail 331, and the matching threads between the left half clamp 3321 and the right half clamp 3322 and the adjusting bolt 333 are opposite, the operator adjusts the distance between the left half clamp 3321 and the right half clamp 3322 by adjusting the adjusting bolt 333 on the fixture positioning rail 331 in the watch cover clamping assembly 3, so that the clamping block group can perfectly fit and clamp the watch cover 10;

[0041] Next, the watch cover 10 is loaded by using the feeding assembly 4 and the two-way watch cover conveying assembly 5. The controller 6 drives the feeding conveyor belt 52 to move toward the feeding assembly 4 to convey the watch cover 10. When the watch cover 10 reaches the preset position, the infrared transmitter 551 and the double-headed infrared receiver 552 in the watch cover detection sensor 55 detect the watch cover 10. After receiving the signal, the controller 6 instructs the telescopic electric cylinder 43 to drive the suction cup cylinder 44 to move downward, so that the suction cup cylinder 44 adsorbs the watch cover 10 in the watch cover positioning groove 54. The telescopic electric cylinder 43 drives the suction cup cylinder 44 to move upward, so that the watch cover 10 leaves the watch cover positioning groove 54, and then starts the conveying motor 41 to drive the conveying screw 42 to rotate, thereby driving the telescopic electric cylinder 43 to reach the watch cover clamping assembly 3. The controller 6 instructs the telescopic cylinder 32 to drive the clamping cylinder 33 to move, and the fixture positioning rail 331 drives the clamping block group 332 to close quickly and tightly clamp the watch cover 10.

[0042] The controller 6 then starts the double-head polishing motor 21, and the two polishing wheels 22 start to run synchronously to perform double-head grinding and polishing operations. At the same time, the longitudinal displacement component 31, driven by the displacement motor 311, cooperates with the displacement screw 312 and the displacement guide rail 313 to achieve precise movement of the watch cover 10 during the polishing process, ensuring a comprehensive and uniform polishing effect;

[0043] The waste chips generated during the polishing process are collected by a waste chip box 12 located in a waste chip groove 11 below the polishing end. The waste chip box 12 slides in and out at the opening of the closed door 13, which is convenient for timely cleaning of waste chips and keeping the equipment clean;

[0044] After polishing is completed, the controller 6 instructs the clamping cylinder 33 to release the watch cover 10. The watch cover 10 is sent to the watch cover positioning groove 54 of the discharge conveyor belt 53 under the action of the suction cup cylinder 44. After the infrared transmitter 551 and the double-headed infrared receiver 552 detect the watch cover 10, the discharge conveyor belt 53 drives the watch cover 10 to the subsequent process.

[0045] The above description is only the optimal solution embodiment of the present invention and is not intended to limit the present invention. Various modifications or substitutions made to the present invention by those skilled in the art without departing from the essence and protection scope of the present invention should also be within the protection scope of the present invention.

Claims

1. A double-headed grinding and polishing machine for watches, characterized in that: The invention comprises a machine platform (1), wherein a polishing device (2) is arranged on the machine platform, and grinding ends are arranged at both ends of the polishing device (2), and two cover clamping assemblies (3) are arranged on the machine platform (1), and the two cover clamping assemblies (3) are respectively located on one side of the two grinding ends, and the cover clamping assembly (3) is provided with a clamping cylinder (33), and both sides of the output end of the clamping cylinder (33) are provided with fixture positioning rails (331), and the two fixture positioning rails (331) are respectively provided with mutually symmetrical clamping block groups (332), and the clamping block groups (332) are respectively provided with a clamping block group (332) on the left and a clamping block group (332) on the right. The left half clamp (3321) and the right half clamp (3322) are composed of a half clamp (3321) and a right half clamp (3322), and are fixed on the fixture positioning rail (331) by means of an adjusting bolt (333) to realize relative sliding adjustment. The inner ends of the left half clamp (3321) and the right half clamp (3322) facing each other are both provided with an arc surface (3323) adapted to the contour of the watch cover (10), so that the watch cover (10) is clamped between the two clamp block groups (332). The adjusting bolt (333) adjusts the relative distance between the left half clamp (3321) and the right half clamp (3322) to adapt to watch covers (10) of different sizes.

2. A double-headed grinding and polishing machine for wristwatches according to claim 1, characterized in that: The cover clamping assembly (3) is also provided with a longitudinal displacement component (31), and a telescopic cylinder (32) is provided on the longitudinal displacement component (31), and the output end of the telescopic cylinder (32) is connected to the clamping cylinder (33).

3. A double-headed grinding and polishing machine for wristwatches according to claim 2, characterized in that: The machine (1) is also provided with a feeding component (4) and two bidirectional watch cover conveying components (5). The feeding component (4) is arranged above the polishing device (2). The two bidirectional watch cover conveying components (5) are respectively arranged on both sides of the machine (1) and are respectively used for loading and unloading the watch cover (10). The feeding component (4) is provided with a conveying motor (41), a conveying screw rod (42), two telescopic electric cylinders (43) and two suction cup cylinders (44). The conveying screw rod (42) is arranged at the output end of the conveying motor (41). The two telescopic electric cylinders (43) are respectively symmetrically arranged at the two ends of the conveying screw rod (42) through two connecting blocks. The two suction cup cylinders (44) are respectively arranged at the output ends of the two telescopic electric cylinders (43).

4. A double-headed grinding and polishing machine for wristwatches according to claim 3, characterized in that: The bidirectional watch cover conveying assembly (5) comprises a conveying platform (51), a feeding conveyor belt (52) and a discharging conveyor belt (53); the feeding conveyor belt (52) and the discharging conveyor belt (53) are both arranged at the upper end of the conveying platform (51), and the feeding conveyor belt (52) and the discharging conveyor belt (53) run in opposite directions; watch cover positioning grooves (54) are evenly distributed on the feeding conveyor belt (52) and the discharging conveyor belt (53), and the watch cover (10) is arranged in the watch cover positioning grooves (54).

5. A double-headed grinding and polishing machine for wristwatches according to claim 4, characterized in that: A cover detection sensor (55) is provided at one end of the conveying platform (51) close to the feeding assembly (4), and the cover detection sensor (55) includes two infrared transmitters (551) and a double-headed infrared receiver (552). The two infrared transmitters (551) are respectively arranged on the outer sides of the feeding conveyor belt (52) and the discharging conveyor belt (53), and are located on the same straight line as the two cover positioning grooves (54) on the feeding conveyor belt (52) and the discharging conveyor belt (53) that are closest to the feeding assembly (4). The double-headed infrared receiver (552) is located between the two cover positioning grooves (54).

6. A double-headed grinding and polishing machine for wristwatches according to claim 1, characterized in that: The upper end surface of the machine table (1) is also provided with two waste chip grooves (11), and the two waste chip grooves (11) are symmetrically arranged below the grinding end. A waste chip box (12) is adapted to be arranged in each of the waste chip grooves (11). Two closed doors (13) are arranged at the front end of the machine table (1), and each of the waste chip boxes (12) is slidably connected to the waste chip groove (11) from the two closed doors (13).

7. A double-headed grinding and polishing machine for wristwatches according to claim 5, characterized in that: The longitudinal displacement component (31) is provided with a displacement motor (311), a displacement screw rod (312) and a displacement guide rail (313); the displacement screw rod (312) is arranged at the output end of the displacement motor (311); the telescopic cylinder (32) is arranged on the displacement screw rod (312) via a guide block, and the guide block is slidably matched on the displacement guide rail (313).

8. A double-headed grinding and polishing machine for wristwatches according to claim 7, characterized in that: The polishing device (2) comprises a double-headed polishing motor (21) and two polishing grinding wheels (22), wherein the two polishing grinding wheels (22) are respectively arranged on two output ends of the double-headed polishing motor (21).

9. A double-headed grinding and polishing machine for wristwatches according to claim 8, characterized in that: A controller (6) is provided in the middle of the machine (1); the double-head polishing motor (21), the displacement motor (311), the cover detection sensor (55), the feeding conveyor belt (52), the discharging conveyor belt (53), the conveying motor (41), the telescopic electric cylinder (43), the suction cup cylinder (44), the telescopic cylinder (32) and the clamping cylinder (33) are all connected to the controller (6) via electrical signals.

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