Positioning clamp and method for laser etching of mobile phone keys

Abstract

The invention relates to the technical field of laser etching processes, in particular to a positioning clamp and method for laser etching of mobile phone keys. Comprising a rack, and a square hole is formed in the top of the rack; the controller is mounted on the side surface of the rack; the mounting plate is arranged in the rack; the first clamps are circumferentially and uniformly connected to the side surface of the mounting plate at intervals; the second clamp is arranged on the first clamp, and an air flow channel is formed in the second clamp; the strip-shaped magnets are symmetrically connected to the second clamp, and the strip-shaped magnets are attracted to the first clamp through magnetic force; the first electric push rod is mounted in the rack; the second electric push rod is mounted on a telescopic rod of the first electric push rod; the connecting pipe is connected to a telescopic rod of the second electric push rod; the electromagnet is mounted at the bottom of the connecting pipe. Through cooperation of the rotating assembly, the adsorption assembly and the electric push rod, automatic feeding, positioning clamping and rotary machining of mobile phone keys can be achieved, and the problem that traditional manual operation is low in efficiency is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of laser engraving processes, and particularly to a positioning fixture and method for laser engraving mobile phone keys. Background Art

[0002] In the process of manufacturing mobile phone keys, especially for mobile phone keys made of rubber or silicone, the laser engraving process is widely used to achieve the engraving of characters, patterns or logos on the key surface. However, due to the certain softness and elasticity of rubber or silicone materials, they are prone to deformation or displacement during clamping and fixing, which poses higher requirements for the positioning accuracy and stability in the processing process.

[0003] Currently, in actual production, for the laser engraving operation of rubber or silicone mobile phone keys, the method of manually cooperating with a positioning fixture is usually adopted for loading and unloading and fixing. Specifically, the operator needs to manually open the positioning fixture first, then place the key to be processed in the designated position of the fixture, and then close the fixture and manually press it tightly to ensure that the key will not be displaced during the engraving process. After the laser engraving is completed, the operator needs to open the fixture again, take out the processed key, and replace it with a new key to be processed, and repeat the above steps for the next round of processing. Although this traditional method can meet the processing requirements to a certain extent, its disadvantages gradually emerge during mass production: First, the entire loading and unloading and clamping process relies on manual operation, with a large labor intensity, which is prone to cause operation fatigue, thereby affecting the processing efficiency and consistency; the processing of each key requires manual loading and unloading, opening and closing the fixture, and pressing and fixing, with cumbersome operation steps and a long processing cycle, making it difficult to meet the requirements of high-efficiency production; the existing positioning fixture lacks an effective connection with the automated laser engraving equipment, making it difficult to achieve continuous and automated production, which will limit the improvement of production efficiency. Summary of the Invention

[0004] In view of this, the present invention provides a positioning fixture and method for laser engraving mobile phone keys, which can overcome the disadvantages that the processing of each key requires manual loading and unloading, opening and closing the fixture, and pressing and fixing, with cumbersome operation steps and affecting the production efficiency, when using the existing positioning fixture for mobile phone keys.

[0005] The technical implementation solution of the present invention is as follows: A positioning fixture and method for laser engraving of mobile phone buttons, including: a frame, with a square hole opened at the top of the frame; a controller, installed on the side of the frame; a mounting plate, arranged inside the frame; a first fixture, circumferentially and evenly spaced and connected to the side of the mounting plate; a second fixture, arranged on the first fixture, and an air flow channel is opened inside the second fixture; a bar magnet, symmetrically connected to the second fixture, and the bar magnet is magnetically adsorbed on the first fixture; a first electric push rod, installed inside the frame; a second electric push rod, installed on the telescopic rod of the first electric push rod; a connecting pipe, connected to the telescopic rod of the second electric push rod; an electromagnet, installed at the bottom of the connecting pipe; an iron sheet, connected to the second fixture; a rotating component, arranged inside the frame, used to drive the mounting plate to rotate; an adsorption component, arranged inside the frame, used to adsorb and fix the mobile phone button at the bottom of the second fixture; a positioning component, arranged inside the second fixture, used to position the mobile phone button.

[0006] Optionally, the rotating component includes: a driving motor, installed inside the frame; a worm, connected to the output shaft of the driving motor; a rotating cylinder, rotatably connected inside the frame, and the end face of the rotating cylinder is fixedly connected to the mounting plate; a worm gear, connected to the outer wall of the rotating cylinder, and the worm gear meshes with the worm.

[0007] Optionally, the adsorption component includes: an air pump, installed inside the frame; an air suction pipe, with both ends respectively connected to the air inlet of the air pump and the connecting pipe and kept in communication; elbow pipes, symmetrically connected to both sides of the connecting pipe and kept in communication; air outlet pipes, symmetrically connected to the second fixture, and the end of the air outlet pipe is in communication with the air flow channel.

[0008] Optionally, the positioning component includes: a positioning plate, with inclined slots symmetrically opened inside the second fixture, the positioning plate is slidably connected to the inclined slots, and a sliding slot is opened on the positioning plate; a limiting mechanism, arranged inside the second fixture, used to limit the positioning plate.

[0009] Optionally, the limiting mechanism includes: connecting springs, symmetrically connected inside the second fixture; a limiting plate, slidably connected to the sliding slot, and the end of the connecting spring is fixedly connected to the limiting plate.

[0010] Optionally, it further includes a sealing component, and the sealing component includes: connecting seats, symmetrically connected to the second fixture; an annular airbag, connected inside the connecting seat, and the annular airbag surrounds the outside of the air outlet pipe; a control mechanism, arranged on the second fixture, used to control the annular airbag to expand or contract.

[0011] Optionally, the control mechanism includes: a push plate, a cavity is opened inside the connecting seat, and the inside of the annular airbag is in communication with the cavity, the push plate is slidably connected to the cavity; a return spring, with both ends respectively connected to the push plate and the connecting seat; a sliding frame, arranged outside the connecting seat, and the sliding frame is fixedly connected to the push plate, and the material of the sliding frame is iron.

[0012] The beneficial effects of the present invention are as follows: 1. Through the coordinated cooperation of the rotating assembly, the adsorption assembly and the electric push rod, the present invention can realize the automatic feeding, positioning and clamping, and rotary processing of mobile phone buttons, overcoming the problem of low efficiency in traditional manual operation. Specifically, the magnetic attraction cooperation between the electromagnet and the iron sheet is used to realize the quick picking and placing of the second fixture. Combined with the rotating mechanism driven by the driving motor, multiple workstations can operate continuously, significantly shortening the processing cycle of a single mobile phone button and meeting the requirements of mass production.

[0013] 2. Through the sliding cooperation between the inclined groove and the positioning plate, and the limiting plate structure driven by the connecting spring, the mobile phone button is automatically pushed to the center position of the second fixture during the adsorption process, ensuring its precise alignment with the laser engraving device. In addition, the annular airbag expands and seals when the elbow pipe is docked with the air outlet pipe, avoiding air leakage in the air circuit, further improving the stability of negative pressure adsorption and preventing the displacement of the button during processing.

[0014] 3. The present invention adopts a modular design. The first fixture and the second fixture can be quickly disassembled and assembled through bar magnets, which is convenient for maintenance and replacement. The controller centrally regulates the action processes of each electric component and the air pump, reducing manual intervention. At the same time, the linkage design between the conveyor and the fixture can realize the automation of the loading and unloading areas, and the buttons before and after processing are automatically separated and conveyed, optimizing the production process. Brief Description of the Drawings

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 It is a bottom view of the second fixture of the present invention.

[0017] Figure 3 It is an installation schematic diagram of the second electric push rod, the connecting pipe, the electromagnet and the adsorption assembly of the present invention.

[0018] Figure 4 It is a top view of the second fixture of the present invention.

[0019] Figure 5 It is an installation schematic diagram of the rotating assembly of the present invention.

[0020] Figure 6 It is a sectional view of the second fixture of the present invention.

[0021] Figure 7 It is an installation schematic diagram of the positioning assembly of the present invention.

[0022] Figure 8 It is a specific structural schematic diagram of the positioning assembly of the present invention.

[0023] Figure 9 It is an installation schematic diagram of the sealing assembly of the present invention.

[0024] Reference numerals in the drawings: 1-frame, 101-square hole, 2-controller, 3-mounting plate, 4-first fixture, 5-second fixture, 501-air flow channel, 6-bar magnet, 7-first electric push rod, 8-second electric push rod, 9-connecting pipe, 10-electromagnet, 11-iron sheet, 12-drive motor, 13-worm, 14-rotating cylinder, 15-worm gear, 16-air pump, 17-suction pipe, 18-elbow pipe, 19-outlet pipe, 20-inclined groove, 21-positioning plate, 2101-sliding groove, 22-connecting spring, 23-limiting plate, 24-connecting seat, 25-annular airbag, 26-cavity, 27-push plate, 28-reset spring, 29-sliding frame. Detailed implementation mode

[0025] Embodiment: A positioning fixture and method for laser engraving of mobile phone keys, as Figures 1 - 8 shown, comprising a frame 1, a controller 2, a mounting plate 3, a first fixture 4, a second fixture 5, a bar magnet 6, a first electric push rod 7, a second electric push rod 8, a connecting pipe 9, an electromagnet 10, an iron sheet 11, a rotating assembly, a suction assembly and a positioning assembly. A square hole 101 is opened in the front side of the top of the frame 1. The controller 2 is installed on the upper right side of the frame 1. The mounting plate 3 is arranged on the upper part of the frame 1. Six first fixtures 4 are circumferentially and evenly spaced and connected to the front side of the mounting plate 3. Each first fixture 4 is provided with a second fixture 5, and an air flow channel 501 is opened inside the second fixture 5. Two bar magnets 6 are symmetrically connected to the side of the second fixture 5 close to the first fixture 4, and the bar magnets 6 are magnetically adsorbed on the first fixture 4, so as to fix the second fixture 5 on the first fixture 4, so that the first fixture 4 and the second fixture 5 can cooperate to clamp the mobile phone key. The first electric push rod 7 is installed on the upper part of the frame 1. The telescopic rod of the first electric push rod 7 is installed with the second electric push rod 8. The telescopic rod of the second electric push rod 8 is connected with the connecting pipe 9. The electromagnet 10 is installed at the bottom of the connecting pipe 9. The iron sheet 11 is connected to the side of the second fixture 5 far from the first fixture 4. The electromagnet 10 can suck the iron sheet 11 by magnetic force, so that the first electric push rod 7 and the second electric push rod 8 can drive the second fixture 5 to move back and forth and up and down through the cooperation of the electromagnet 10 and the iron sheet 11. A rotating assembly for driving the mounting plate 3 to rotate is arranged in the frame 1, a suction assembly for sucking and fixing the mobile phone key at the bottom of the second fixture 5 is further arranged in the frame 1, and a positioning assembly for positioning the mobile phone key is arranged in the second fixture 5.

[0026] As Figure 5 shown, the rotating assembly includes a drive motor 12, a worm 13, a rotating cylinder 14 and a worm gear 15. The drive motor 12 is installed on the upper left rear side of the frame 1 (in order to Figure 1(described from the perspective shown), a worm 13 is connected to the output shaft of the drive motor 12, a rotating cylinder 14 is rotatably connected to the upper part of the frame 1, the first electric push rod 7 is located inside the rotating cylinder 14, and the front end face of the rotating cylinder 14 is fixedly connected to the rear side face of the mounting plate 3. A worm gear 15 is connected to the rear part of the outer wall of the rotating cylinder 14, and the worm gear 15 meshes with the worm 13.

[0027] As Figure 1 and Figure 3 shown, the adsorption assembly includes an air pump 16, an air suction pipe 17, a bent pipe 18, and an air outlet pipe 19. The air pump 16 is installed on the upper part of the frame 1. An air suction pipe 17 is connected between the air inlet of the air pump 16 and the rear side of the connecting pipe 9 and kept in communication. Bent pipes 18 are connected to both the left and right sides of the connecting pipe 9 and kept in communication. Two air outlet pipes 19 are symmetrically connected to the side of the second clamp 5 away from the first clamp 4, and the end of the air outlet pipe 19 is in communication with the air flow channel 501.

[0028] As Figures 6 - 8 shown, the positioning assembly includes a positioning plate 21 and a limiting mechanism. Four inclined slots 20 are symmetrically formed in each second clamp 5. A positioning plate 21 is slidably connected in each inclined slot 20. A sliding slot 2101 is formed in each positioning plate 21. A limiting mechanism for limiting the positioning plate 21 is provided in the second clamp 5; the limiting mechanism includes a connecting spring 22 and a limiting plate 23. Four connecting springs 22 are symmetrically connected in each second clamp 5. The end of the connecting spring 22 away from the second clamp 5 is connected to a limiting plate 23, and the limiting plate 23 is located in the sliding slot 2101.

[0029] Initially, the positioning plate 21 is retracted into the second fixture 5 under the extrusion of the first fixture 4, and the connecting spring 22 is in a compressed state; when laser engraving the mobile phone keys is required, first install this fixture at the designated position so that this fixture is located below the laser engraving device and behind the conveyor, and then intermittently convey the mobile phone keys to the right through the conveyor; then the controller 2 will control the second electric push rod 8 to drive the connecting pipe 9 to move downward, and the connecting pipe 9 can drive the electromagnet 10 and the elbow pipe 18 to move downward, so that the bottom of the electromagnet 10 contacts the top of the iron sheet 11, and the elbow pipe 18 is sleeved outside the air outlet pipe 19. Then the controller 2 will control the electromagnet 10 to be energized, so that the electromagnet 10 can attract the iron sheet 11 through magnetic force, so as to fix the second fixture 5 at the bottom of the electromagnet 10. Then the controller 2 will control the second electric push rod 8 to drive the connecting pipe 9 to move upward to reset, and the connecting pipe 9 can drive the electromagnet 10, the elbow pipe 18, the iron sheet 11 and the second fixture 5 to move upward. The second fixture 5 can drive the bar magnet 6 and the positioning plate 21 to move upward, so that the second fixture 5, the bar magnet 6 and the positioning plate 21 are all separated from the first fixture 4. At this time, the connecting spring 22 will return to its original state, driving the limiting plate 23 to move downward, and the limiting plate 23 can drive the positioning plate 21 to move downward. At the same time, the inclined groove 20 will squeeze the positioning plate 21 to move away from the center position of the second fixture 5 and open. Then the controller 2 will control the first electric push rod 7 to drive the second electric push rod 8 to move forward, driving the second fixture 5 to move forward above the conveyor. Then the conveyor will convey a mobile phone key to directly below the second fixture 5, and at this time the conveyor will pause. Then the controller 2 will control the second electric push rod 8 to drive the second fixture 5 to move downward, and the second fixture 5 will drive the positioning plate 21 to move downward. When the positioning plate 21 contacts the top of the conveyor, the positioning plate 21 will be compressed and retracted into the second fixture 5, thus squeezing the limiting plate 23 to move upward relative to the second fixture 5, and the connecting spring 22 is compressed. At the same time, the inclined groove 20 will squeeze the positioning plate 21 to move closer to the center position of the second fixture 5. When the positioning plate 21 contacts the mobile phone key on the top of the conveyor, it will push the mobile phone key to move closer to the center position of the second fixture 5 to be centered, ensuring that the second fixture 5 and the mobile phone key can be vertically aligned. Subsequently, the bottom of the second fixture 5 will contact the mobile phone key on the top of the conveyor. At this time, the controller 2 will control the air pump 16 to extract the air inside the air flow channel 501 through the suction pipe 17, the connecting pipe 9, the elbow pipe 18 and the air outlet pipe 19, so that a suction force can be generated at the bottom of the second fixture 5 to suck the mobile phone key. Then the controller 2 will control the second electric push rod 8 to drive the second fixture 5 to move upward, and the second fixture 5 will move the mobile phone key upward to separate from the conveyor. Subsequently, the controller 2 will control the first electric push rod 7 to drive the second electric push rod 8 to move backward to reset, and the second electric push rod 8 will drive the second fixture 5 to move backward to reset directly above the first fixture 4. Then the controller 2 will control the second electric push rod 8 to drive the second fixture 5 to move downward,The second fixture 5 can drive the bar magnet 6 and the mobile phone button to move downward, so that the mobile phone button moves into the first fixture 4, and the bar magnet 6 can attract the first fixture 4 by magnetic force, so that the first fixture 4 and the second fixture 5 can cooperate to clamp the mobile phone button between them. Then, the controller 2 will control the electromagnet 10 to cut off the power, so that the electromagnet 10 no longer attracts the iron sheet 11. Subsequently, the controller 2 will control the driving motor 12 to drive the worm 13 to rotate a specified number of turns. The worm 13 can drive the worm wheel 15 and the rotating cylinder 14 to rotate a specified angle. The rotating cylinder 14 can drive the mounting plate 3, the first fixture 4 and the second fixture 5 to rotate a specified angle, so that the next set of the first fixture 4 and the second fixture 5 rotates to directly below the electromagnet 10. By repeating the above operations, each mobile phone button can be automatically placed into the first fixture 4 and the second fixture 5, and it is ensured that the first fixture 4 and the second fixture 5 clamp the mobile phone button. When the mobile phone button rotates to the square hole 101 with the first fixture 4 and the second fixture 5, the mobile phone button can be laser-engraved by the laser-engraving device. In this way, the mobile phone buttons can be continuously laser-engraved, improving the work efficiency; when the laser-engraving of the mobile phone button is completed, the laser-engraved mobile phone button will still be located between the first fixture 4 and the second fixture 5. When the laser-engraved mobile phone button rotates to directly below the electromagnet 10 with the first fixture 4 and the second fixture 5, through the action of the adsorption component, when the second fixture 5 moves above the conveyor, it will drive the laser-engraved mobile phone button to move above the conveyor together and place the laser-engraved mobile phone button on the conveyor. The conveyor can convey the laser-engraved mobile phone button to the right for discharging. In this way, the discharging work of the mobile phone button can be automatically completed. Taking this fixture as the demarcation point for the conveyor, the part of the conveyor on the left side of this fixture conveys and feeds the mobile phone buttons to be processed, and the part of the conveyor on the right side of this fixture conveys and discharges the processed mobile phone buttons.,

[0030] As Figure 9 shown, it further includes a sealing component. The sealing component includes a connecting seat 24, an annular airbag 25 and a control mechanism. Two connecting seats 24 are symmetrically connected to the side of the second fixture 5 away from the first fixture 4. An annular airbag 25 is installed in each connecting seat 24. The annular airbags 25 correspond to the air outlet pipes 19 one by one, and the annular airbags 25 surround the outside of the air outlet pipes 19. A control mechanism for controlling the annular airbag 25 to expand or contract is provided on the second fixture 5; the control mechanism includes a push plate 27, a return spring 28 and a sliding frame 29. A cavity 26 is opened inside each connecting seat 24, and the inside of the annular airbag 25 is in communication with the cavity 26. A push plate 27 is slidably connected in the cavity 26. A return spring 28 is connected between the push plate 27 and the connecting seat 24. A sliding frame 29 is provided on the outside of each connecting seat 24, and the sliding frame 29 is fixedly connected to the push plate 27. The sliding frame 29 is made of iron.

[0031] When the elbow pipe 18 moves downward and sleeves on the outside of the air outlet pipe 19, the elbow pipe 18 will pass through the inside of the annular airbag 25. When the bottom of the electromagnet 10 contacts the top of the iron sheet 11, the electromagnet 10 will be located between two sliding frames 29 on the same second fixture 5. When the electromagnet 10 is energized to attract the iron sheet 11, the electromagnet 10 will attract two sliding frames 29 on the same second fixture 5 to move towards the side close to each other by magnetic force, driving two push plates 27 to move towards the side close to each other. The return spring 28 is compressed, and the push plate 27 will squeeze the air in the cavity 26 into the annular airbag 25, causing the annular airbag 25 to expand. At this time, the annular airbag 25 will closely adhere to the outside of the elbow pipe 18 and the air outlet pipe 19, so as to seal between the elbow pipe 18 and the air outlet pipe 19, prevent air leakage at the socket of the elbow pipe 18 and the air outlet pipe 19, and ensure the normal operation of the adsorption component. When the electromagnet 10 is powered off, the return spring 28 will return to its original state, driving the push plate 27 and the sliding frame 29 to move back to their original positions. The push plate 27 can pump the air in the annular airbag 25 back into the cavity 26, causing the annular airbag 25 to contract and recover, and the annular airbag 25 will separate from the outside of the elbow pipe 18 and the air outlet pipe 19.

Claims

1. A positioning fixture for laser engraving of mobile phone keys, comprising: a frame (1); characterized in that, It also includes: a controller (2), a square hole (101) is opened at the top of the frame (1), and the controller (2) is installed on the side of the frame (1); a mounting plate (3) is arranged inside the frame (1); a first clamp (4) is circumferentially and evenly spaced and connected to the side of the mounting plate (3); a second clamp (5) is arranged on the first clamp (4), and an air flow channel (501) is opened inside the second clamp (5); a bar magnet (6) is symmetrically connected to the second clamp (5), and the bar magnet (6) is magnetically adsorbed on the first clamp (4); a first electric push rod (7) is installed inside the frame (1); a second electric push rod (8) is installed on the telescopic rod of the first electric push rod (7). A connecting pipe (9) is connected to the telescopic rod of the second electric push rod (8); an electromagnet (10) is installed at the bottom of the connecting pipe (9); an iron sheet (11) is connected to the second clamp (5); a rotating assembly is arranged inside the frame (1) and is used to drive the mounting plate (3) to rotate; an adsorption assembly is arranged inside the frame (1) and is used to adsorb and fix the mobile phone keys at the bottom of the second clamp (5); a positioning assembly is arranged inside the second clamp (5) and is used to position the mobile phone keys.

2. The positioning fixture for laser engraving of mobile phone keys according to claim 1, characterized in that, The rotating assembly includes: a driving motor (12) installed inside the frame (1); a worm (13) connected to the output shaft of the driving motor (12); a rotating cylinder (14) rotatably connected inside the frame (1), and the end face of the rotating cylinder (14) is fixedly connected to the mounting plate (3); a worm gear (15) is connected to the outer wall of the rotating cylinder (14), and the worm gear (15) meshes with the worm (13).

3. The positioning fixture for laser engraving of mobile phone keys according to claim 1, characterized in that, The adsorption assembly includes: an air pump (16) installed inside the frame (1); an air suction pipe (17) with both ends respectively connected to the air inlet of the air pump (16) and the connecting pipe (9) and kept in communication; elbow pipes (18) symmetrically connected to both sides of the connecting pipe (9) and kept in communication; air outlet pipes (19) symmetrically connected to the second clamp (5), and the end of the air outlet pipe (19) is in communication with the air flow channel (501).

4. A positioning fixture for laser engraving of mobile phone keys according to claim 1, characterized in that The positioning assembly includes: a positioning plate (21), inclined slots (20) are symmetrically opened inside the second clamp (5), the positioning plate (21) is slidably connected inside the inclined slots (20), and a sliding slot (2101) is opened on the positioning plate (21); a limiting mechanism is arranged inside the second clamp (5) and is used to limit the positioning plate (21).

5. The positioning fixture for laser engraving of mobile phone keys according to claim 4, characterized in that, The limiting mechanism includes: connecting springs (22) symmetrically connected inside the second clamp (5); a limiting plate (23) slidably connected inside the sliding slot (2101), and the end of the connecting spring (22) is fixedly connected to the limiting plate (23).

6. The positioning fixture for laser engraving of mobile phone keys according to claim 3, characterized in that It also includes a sealing assembly, and the sealing assembly includes: connecting seats (24) symmetrically connected to the second clamp (5); an annular airbag (25) connected inside the connecting seat (24), and the annular airbag (25) surrounds the outside of the air outlet pipe (19); a control mechanism is arranged on the second clamp (5) and is used to control the annular airbag (25) to expand or contract.

7. A positioning fixture for laser engraving of mobile phone keys according to claim 6, characterized in that, The control mechanism includes: a push plate (27), a connecting seat (24) with a cavity (26) formed inside, and the inside of the annular airbag (25) is in communication with the cavity (26), and the push plate (27) is slidably connected to the cavity (26); a return spring (28) with two ends respectively connected to the push plate (27) and the connecting seat (24); a sliding frame (29) arranged on the outer side of the connecting seat (24), and the sliding frame (29) is fixedly connected to the push plate (27), and the sliding frame (29) is made of iron.

8. The usage method of a positioning fixture for laser engraving of mobile phone keys according to claim 4, characterized in that, It includes the following steps: First, the controller (2) controls the second electric push rod (8) to drive the connecting pipe (9) to move downward. The connecting pipe (9) drives the electromagnet (10) and the elbow pipe (18) to move downward, so that the bottom of the electromagnet (10) contacts the top of the iron sheet (11). The elbow pipe (18) is sleeved outside the air outlet pipe (19). Then, the controller (2) controls the electromagnet (10) to be energized to attract the iron sheet (11). Subsequently, the controller (2) controls the second electric push rod (8) to drive the connecting pipe (9) and the second fixture (5) to move upward to reset. Then, the controller (2) controls the first electric push rod (7) to drive the second electric push rod (8) to move forward, driving the second fixture (5) to move forward above the conveyor. A mobile phone button is conveyed by the conveyor to directly below the second fixture (5). Then, the controller (2) controls the second electric push rod (8) to drive the second fixture (5) to move downward. The second fixture (5) drives the positioning plate (21) to move downward. When the positioning plate (21) contacts the top of the conveyor, the inclined groove (20) squeezes the positioning plate (21) to move closer to the center position of the second fixture (5), so that the positioning plate (21) pushes the mobile phone button to move closer to the center position of the second fixture (5) to be centered. Subsequently, the controller (2) controls the air pump (16) to extract the air inside the air flow channel (501) through the suction pipe (17), the connecting pipe (9), the elbow pipe (18) and the air outlet pipe (19), so that a suction force can be generated at the bottom of the second fixture (5) to hold the mobile phone button. Then, the controller (2) controls the second electric push rod (8) to drive the second fixture (5) to move upward. The second fixture (5) drives the mobile phone button to move upward to separate from the conveyor. Subsequently, the controller (2) controls the first electric push rod (7) to drive the second electric push rod (8) to move backward to reset. The second electric push rod (8) drives the second fixture (5) to move backward to reset directly above the first fixture (4). Then, the controller (2) controls the second electric push rod (8) to drive the second fixture (5) to move downward. The second fixture (5) can drive the bar magnet (6) and the mobile phone button to move downward, so that the mobile phone button moves into the first fixture (4), and the bar magnet (6) can attract the first fixture (4) by magnetic force, so that the first fixture (4) and the second fixture (5) cooperate to clamp the mobile phone button between them. Then, the controller (2) controls the electromagnet (10) to be powered off, so that the electromagnet (10) no longer attracts the iron sheet (11). Subsequently, the controller (2) controls the drive motor (12) to drive the worm (13) to rotate. The worm (13) drives the worm gear (15) and the rotating cylinder (14) to rotate. The rotating cylinder (14) can drive the mounting plate (3), the first fixture (4) and the second fixture (5) to rotate by a specified angle. When the mobile phone button rotates to the square hole (101) with the first fixture (4) and the second fixture (5), laser engraving is performed on the mobile phone button by the laser engraving device.

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