3D plastic laser welding method and device with track self-adaption function

Abstract

The invention relates to the field of plastic workpiece processing, and discloses a 3D plastic laser welding method with a track self-adaption function, which comprises the following steps: S10, beam shaping: before putting into use, starting a motor according to requirements, then adjusting the distance between a second lens and a first lens through the motor, and then adjusting the distance between the second lens and the first lens; therefore, the required laser divergence angle and shape are adjusted. S20, replacing the emission head: after the light beam shaping is completed, replacing the imaging emission head through a replacement assembly arranged on the outer wall of the clamping cylinder according to the adjusted data; and S30, self-adaptive bending connection is conducted, specifically, downward pressure is applied to the guide sleeve, so that the imaging emission head is tightly attached to the material body. The distance between the second lens and the first lens is adjusted through the motor, flexible adjustment of the shape and the divergence angle of the laser beam is achieved, and through the design, the laser equipment can generate laser beams in various shapes such as a square shape, an oval shape and a rhombus shape, and the laser equipment is suitable for different material body application scenes.

Description

Technical Field

[0001] The present invention relates to the technical field of plastic workpiece processing, and in particular to a 3D plastic laser welding method and device with trajectory self-adaptation function. Background Art

[0002] Transmission welding is an advanced laser welding technology that is widely used in the connection of plastic materials. The basic principle is to penetrate the upper transparent or translucent material through a high-energy laser beam and generate sufficient heat at the interface of the lower material, causing the material to melt and form a strong welded joint.

[0003] However, during the existing projection welding process, due to the different welding positions of the three-dimensional plastic components, the imaging transmitter head in the conventional welding component cannot always be close to the weld including the weld in the gap. Therefore, it is necessary to repeatedly replace the imaging transmitter head and adjust the laser beam emission shape, which affects the processing efficiency and reduces the overall processing speed.

[0004] To solve this problem, the present invention proposes a 3D plastic laser welding method and device with trajectory self-adaptation function. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a 3D plastic laser welding method and device with trajectory adaptive function, which solves the problem of lowering production efficiency due to replacement of the existing imaging transmitter head and adjustment of the transmitter shape.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: A 3D plastic laser welding method with trajectory adaptive function, comprising the following steps:

[0007] S10, beam shaping: before being put into use, the motor is started according to the demand, and then the distance between the second lens and the first lens is adjusted by the motor, thereby adjusting the required laser divergence angle and shape;

[0008] S20, replacement of the emission head: after the beam shaping is completed, the imaging emission head can be replaced according to the adjusted data through the replacement component arranged on the outer wall of the cartridge, so as to complete the preparation work before use;

[0009] S30, Adaptive bending connection: The guide sleeve is controlled by a robotic arm to exert downward pressure on the guide sleeve so that the imaging transmitter is close to the material body. When the optical fiber output laser heating connection encounters a slope, the first spring is set to automatically lift the cartridge and automatically push the imaging transmitter connected to the cartridge close to the material body when going downhill.

[0010] Preferably, in step S10, the laser divergence shape includes one or more of square, elliptical, and diamond.

[0011] Preferably, the imaging transmitter replaced in step S20 has the same laser divergence shape as that adjusted in step S10.

[0012] A 3D plastic laser welding device with a trajectory adaptive function uses a 3D plastic laser welding method with a trajectory adaptive function, including a guide sleeve and a material body. An optical fiber is arranged inside the guide sleeve, a cartridge is slidably connected to the inner wall of the guide sleeve, a first spring is arranged at the bottom of the guide sleeve, a first lens is fixedly connected to the middle end of the inner wall of the cartridge, a motor is fixedly connected to one side of the inner wall of the cartridge, a lead screw is fixedly connected to the output end of the motor, a second lens is threadedly connected to the outer wall of the lead screw, a guide rod is fixedly connected to one side of the inner wall of the cartridge, and a replacement component is arranged at the bottom of the cartridge.

[0013] Preferably, the replacement component includes a positioning block, a plurality of the positioning blocks are fixedly connected to the outer wall of the cartridge, the inner wall of the positioning block is slidably connected with a push rod, one side of the push rod is fixedly connected with a steel cable, the inner wall of the positioning block is provided with a plurality of bearings, one side of the steel cable is fixedly connected with a locking block, one side of the locking block is provided with a second spring, the bottom of the cartridge is slidably connected with an imaging transmitter, and the bottom of the imaging transmitter is movably connected with a welding contact head.

[0014] Preferably, the first spring is arranged on one side of the outer wall of the cartridge.

[0015] Preferably, the second lens is slidably connected to the outer wall of the guide rod, and the second lens is slidably connected to the inner wall of the cartridge.

[0016] Preferably, the second lens is slidably connected to the bottom of the first lens.

[0017] Preferably, the locking block is slidably connected to one side of the inner wall of the positioning block, and a plurality of the locking blocks are slidably connected to both sides of the outer wall of the imaging transmitter head.

[0018] Preferably, the steel cable sleeve is arranged on the outer walls of a plurality of bearings, and one side of the second spring is arranged on the inner wall of the positioning block.

[0019] Working principle: Before being put into use, different states are preset through PLC according to needs, and the motor is started through PLC. Then the motor outputs power to drive the lead screw to rotate, so as to adjust the position of the second lens through the threaded connection. As the distance between the second lens and the first lens changes, the laser divergence angle and shape are adjusted.

[0020] After the beam shaping is completed, the imaging transmitter head can be replaced according to the adjusted data through the replacement assembly arranged on the outer wall of the cartridge. First, the push rod can be pushed toward the cartridge. When the push rod moves under the limit of the positioning block, it will pull the locking block connected to the steel cable to cancel the distance between the original imaging transmitter head and the original imaging transmitter head. Then, after the replaced original imaging transmitter head is sent in, the push rod is loosened. The second spring will push the locking block to connect with the preset holes on both sides of the replaced imaging transmitter head without resistance, thereby completing the position locking and completing the preparation work before use.

[0021] During specific use, the guide sleeve is controlled by a robotic arm to apply downward pressure to the guide sleeve so that the imaging transmitter head is close to the material body. When the optical fiber output laser heating connection encounters a slope, the first spring setting can automatically lift the cartridge and automatically push the imaging transmitter head connected to the cartridge close to the material body when going downhill.

[0022] The invention provides a 3D plastic laser welding method and device with trajectory self-adaptation function.

[0023] It has the following beneficial effects:

[0024] 1. The present invention uses a motor to adjust the distance between the second lens and the first lens in step S10, thereby achieving flexible adjustment of the shape and divergence angle of the laser beam. This design enables the laser device to generate laser beams in various shapes such as square, elliptical, and diamond according to specific needs, which is suitable for different material body application scenarios.

[0025] 2. The present invention can quickly replace the imaging transmitter head through the replacement component provided on the outer wall of the cartridge in step S20, which enables the device to replace the adapted imaging transmitter head according to the adjusted data, thereby improving the working efficiency and flexibility of the device.

[0026] 3. The present invention controls the guide sleeve by the robot arm in step S30, and utilizes the setting of the first spring so that the imaging transmitter head can automatically adjust the height when encountering a slope or an uneven material surface, thereby achieving an adaptive bending connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the process of the present invention;

[0028] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 3 for Figure 2 An enlarged schematic diagram of point A.

[0030] Among them, 1. guide sleeve; 2. optical fiber; 3. cartridge; 4. first spring; 5. first lens; 6. motor; 7. lead screw; 8. second lens; 9. guide rod; 10. imaging transmitter; 11. material body; 12. positioning block; 13. push rod; 14. bearing; 15. steel cable; 16. locking block; 17. second spring; 18. welding contact head. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] Please see attached Figure 1 , an embodiment of the present invention provides a 3D plastic laser welding method with trajectory adaptive function, comprising the following steps:

[0033] S10, beam shaping: before being put into use, the motor 6 is started according to the demand, and then the distance between the second lens 8 and the first lens 5 is adjusted by the motor 6, thereby adjusting the required laser divergence angle and shape; the laser divergence shape includes one or more of square, elliptical, and diamond. The shape and divergence angle of the laser beam can be flexibly adjusted according to different application requirements, improving the versatility of the equipment, and the precise adjustment of the laser beam shape can be achieved through the precision mechanical control system to improve the quality of processing and imaging.

[0034] First, according to the material to be processed and the specific process requirements, determine the required laser beam shape and divergence angle, and preset parameters: preset corresponding parameters through the control system, including the speed of motor 6, the moving distance, etc. Start the motor 6 to drive the screw 7 to rotate and start adjusting the lens position;

[0035] Then, as the screw rod 7 rotates, the distance between the second lens 8 and the fixed first lens 5 changes. By changing the distance between the lenses, the divergence angle and shape of the laser beam are also adjusted accordingly.

[0036] The change in lens spacing changes the degree of convergence or divergence of the laser beam, thereby adjusting the shape and size of the spot. Depending on the lens configuration and distance, the laser beam can be shaped into different shapes such as square, ellipse, diamond, etc. to meet diverse needs.

[0037] In actual operation, the processing parameters are preset and the movement of the motor 6 and the screw 7 is precisely controlled by the PLC. Sensors can be set to monitor the lens position and laser beam characteristics in real time and feed the data back to the control system. Based on the feedback data, the control system dynamically adjusts the lens position to ensure that the laser beam always maintains the best state.

[0038] S20, replacement of the emission head: After the beam shaping is completed, the imaging emission head 10 can be replaced according to the adjusted data through the replacement component set on the outer wall of the cartridge 3, so as to complete the pre-use preparation work; the replaced imaging emission head 10 has the same laser divergence shape as that adjusted in step S10. The imaging emission head 10 can be replaced quickly, which improves the working efficiency of the equipment and reduces downtime. The replaced emission head matches the laser divergence shape after beam shaping to ensure the quality of laser output, and automatic locking and replacement are achieved through mechanical design, which is easy to operate and reduces manual intervention and operating errors.

[0039] After the beam shaping is completed, the system automatically collects the adjusted laser divergence shape data. Based on the collected data, the system determines the matching imaging transmitter head 10. The system prompts the operator or the automatic system to prepare for the transmitter head replacement.

[0040] A plurality of positioning blocks 12 and replacement components are provided on the outer wall of the cartridge 3 for fixing and quickly replacing the imaging transmitter head 10. Pushing the push rod 13 in the positioning block 12 drives the steel cable 15 to pull the locking block 16 to unlock the existing transmitter head. Remove the original transmitter head, insert the new transmitter head, loosen the push rod 13, and the second spring 17 pushes the locking block 16 to fix the new transmitter head in place.

[0041] Based on the beam shaping data, the transmitter head that matches the adjusted laser divergence shape is automatically selected.

[0042] Use sensors or vision systems to confirm the position and locking status of the newly installed transmitter to ensure that it matches the preset shape.

[0043] S30, adaptive bending connection: The guide sleeve 1 is controlled by the mechanical arm to apply downward pressure to the guide sleeve 1, so that the imaging transmitter 10 is close to the material body 11. When the optical fiber 2 outputs laser heating connection and encounters a slope, the first spring 4 is set to automatically lift the cartridge 3, and automatically push the imaging transmitter 10 connected to the cartridge 3 to close to the material body 11 when going downhill. It can automatically adapt to the ups and downs of the material surface to ensure the smoothness and accuracy of the laser heating connection process. Through automatic adjustment, it is ensured that the imaging transmitter 10 always maintains good contact with the material body 11, improves the connection quality, and has a high degree of automation, reduces manual operations, and improves work efficiency and consistency.

[0044] When the slope is detected to be rising, the first spring 4 is stressed and automatically lifts the cartridge 3 to prevent the transmitter from being separated from the material. When the slope is descending, the first spring 4 releases the pressure and the cartridge 3 is pressed down accordingly to ensure that the transmitter is in close contact with the material. Through the coordinated action of the robotic arm and the first spring 4, the position of the cartridge 3 is automatically adjusted to ensure that the imaging transmitter 10 is in close contact with the surface of the material. When going downhill, the cartridge 3 is automatically pushed to keep the imaging transmitter 10 in close contact with the surface of the material to ensure the laser heating connection effect. The automatic adjustment and highly automated design improves the working efficiency and operation consistency of the equipment, significantly improves the connection quality, and adapts to various complex connection requirements.

[0045] Embodiment 2:

[0046] Please see attached Figure 2 The embodiment of the present invention provides a 3D plastic laser welding device with trajectory self-adaptation function, including a guide sleeve 1 and a material body 11. An optical fiber 2 is arranged inside the guide sleeve 1. A cartridge 3 is slidably connected to the inner wall of the guide sleeve 1. A first spring 4 is arranged at the bottom of the guide sleeve 1. A first lens 5 is fixedly connected to the middle end of the inner wall of the cartridge 3. A motor 6 is fixedly connected to one side of the inner wall of the cartridge 3. A lead screw 7 is fixedly connected to the output end of the motor 6. A second lens 8 is threadedly connected to the outer wall of the lead screw 7. A guide rod 9 is fixedly connected to one side of the inner wall of the cartridge 3. A replacement component is arranged at the bottom of the cartridge 3. A welding contact head 18 is movably connected to the bottom of the imaging transmitter head 10. The welding contact head 18 is usually changed according to the replacement of the imaging transmitter head 10. Its function is to always be close to the material body 11 and facilitate the laser to pass through.

[0047] The first spring 4 is arranged on one side of the outer wall of the cartridge 3 . Such a design can limit the position of the other side of the first spring 4 so that it can stably push one side of the cartridge 3 .

[0048] Before being put into use, different states are preset through PLC according to needs, and the motor 6 is started through PLC, and then the motor 6 outputs power to drive the screw 7 to rotate, so as to adjust the position of the second lens 8 through the threaded connection, and the laser divergence angle and shape are adjusted as the distance between the second lens 8 and the first lens 5 changes;

[0049] When in use, the guide sleeve 1 is controlled by a robotic arm to apply downward pressure to the guide sleeve 1, so that the welding contact head 18 arranged at the bottom of the imaging transmitter head 10 is close to the material body 11. When the optical fiber 2 outputs laser heating connection and encounters a slope, the setting of the first spring 4 can automatically lift the cartridge 3, and automatically push the imaging transmitter head 10 connected to the cartridge 3 to be close to the material body 11 when going downhill.

[0050] Please see attached Figure 2The second lens 8 is slidably connected to the outer wall of the guide rod 9. The setting of the guide rod 9 can improve the stability of the movement of the second lens 8 and avoid tilting on one side, which affects the effect of light passing through. The second lens 8 is slidably connected to the inner wall of the cartridge 3 to limit the overall movement stroke of the second lens 8. The second lens 8 is slidably connected to the bottom of the first lens 5.

[0051] Please see attached Figure 3 The replacement component includes a positioning block 12, multiple positioning blocks 12 are fixedly connected to the outer wall of the cartridge 3, the inner wall of the positioning block 12 is slidably connected with a push rod 13, one side of the push rod 13 is fixedly connected with a steel cable 15, the inner wall of the positioning block 12 is provided with multiple bearings 14, the steel cable 15 is sleeved on the outer walls of the multiple bearings 14, and the setting of the bearings 14 can effectively reduce the friction on the steel cable 15, thereby achieving a labor-saving effect, one side of the steel cable 15 is fixedly connected with a locking block 16, and the locking block 16 is slidably connected to one side of the inner wall of the positioning block 12, thereby limiting the displacement stroke of the locking block 16.

[0052] Please see attached Figure 3 A second spring 17 is provided on one side of the locking block 16, and one side of the second spring 17 is provided on the inner wall of the positioning block 12, so that the positions on both sides of the second spring 17 are limited, and the bottom of the cartridge 3 is slidably connected with the imaging transmitter 10.

[0053] First, the push rod 13 can be pushed toward the cartridge 3. When the push rod 13 moves under the limit of the positioning block 12, the locking block 16 connected to the steel cable 15 will be pulled to cancel the distance between the original imaging transmitter head 10. Then, after the replaced original imaging transmitter head 10 is sent in, the push rod 13 is loosened, and multiple locking blocks 16 are slidably connected to both sides of the outer wall of the imaging transmitter head 10. The second spring 17 will push the locking block 16 to connect with the preset holes on both sides of the replaced imaging transmitter head 10 in the absence of resistance, thereby completing the position locking.

[0054] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A 3D plastic laser welding method with trajectory adaptive function, characterized in that: The following steps are involved: S10, beam shaping: before being put into use, the motor (6) is started according to demand, and then the distance between the second lens (8) and the first lens (5) is adjusted by the motor (6), thereby adjusting the required laser divergence angle and shape; S20, replacement of the emission head: after the beam shaping is completed, the imaging emission head (10) can be replaced according to the adjusted data through the replacement component arranged on the outer wall of the cartridge (3), thereby completing the pre-use preparation work; S30, adaptive bending connection: the guide sleeve (1) is controlled by a mechanical arm to apply downward pressure to the guide sleeve (1), so that the imaging transmitter (10) is closely attached to the material body (11). When the optical fiber (2) outputs laser heating connection and encounters a slope, the first spring (4) is set to automatically lift the cartridge (3) and automatically push the imaging transmitter (10) connected to the cartridge (3) to be closely attached to the material body (11) when going downhill.

2. A 3D plastic laser welding method with trajectory adaptive function according to claim 1, characterized in that: In the step S10, the laser divergence shape includes one or more of square, ellipse, and diamond.

3. The 3D plastic laser welding method with trajectory adaptive function according to claim 1, characterized in that: The imaging emission head (10) replaced in step S20 has the same laser divergence shape as that adjusted in step S10.

4. A 3D plastic laser welding device with trajectory adaptive function, using the 3D plastic laser welding method with trajectory adaptive function according to claims 1 to 3, characterized in that: The invention comprises a guide sleeve (1) and a material body (11); an optical fiber (2) is arranged inside the guide sleeve (1); a cartridge (3) is slidably connected to the inner wall of the guide sleeve (1); a first spring (4) is arranged at the bottom of the guide sleeve (1); a first lens (5) is fixedly connected to the middle end of the inner wall of the cartridge (3); a motor (6) is fixedly connected to one side of the inner wall of the cartridge (3); a lead screw (7) is fixedly connected to the output end of the motor (6); a second lens (8) is threadedly connected to the outer wall of the lead screw (7); a guide rod (9) is fixedly connected to one side of the inner wall of the cartridge (3); and a replacement component is arranged at the bottom of the cartridge (3).

5. The 3D plastic laser welding device with trajectory adaptive function according to claim 4, characterized in that: The replacement component comprises a positioning block (12), a plurality of the positioning blocks (12) are fixedly connected to the outer wall of the cartridge (3), the inner wall of the positioning block (12) is slidably connected to a push rod (13), one side of the push rod (13) is fixedly connected to a steel cable (15), the inner wall of the positioning block (12) is provided with a plurality of bearings (14), one side of the steel cable (15) is fixedly connected to a locking block (16), one side of the locking block (16) is provided with a second spring (17), the bottom of the cartridge (3) is slidably connected to an imaging transmitter (10), and the bottom of the imaging transmitter (10) is movably connected to a welding contact head (18).

6. The 3D plastic laser welding device with trajectory adaptive function according to claim 4, characterized in that: The first spring (4) is arranged on one side of the outer wall of the cartridge (3).

7. The 3D plastic laser welding device with trajectory adaptive function according to claim 4, characterized in that: The second lens (8) is slidably connected to the outer wall of the guide rod (9), and the second lens (8) is slidably connected to the inner wall of the cartridge (3).

8. The 3D plastic laser welding device with trajectory adaptive function according to claim 4, characterized in that: The second lens (8) is slidably connected to the bottom of the first lens (5).

9. The 3D plastic laser welding device with trajectory adaptive function according to claim 5, characterized in that: The locking block (16) is slidably connected to one side of the inner wall of the positioning block (12), and a plurality of the locking blocks (16) are slidably connected to both sides of the outer wall of the imaging transmitter head (10).

10. The 3D plastic laser welding device with trajectory adaptive function according to claim 5, characterized in that: The steel cable (15) is sleeved on the outer walls of a plurality of bearings (14), and one side of the second spring (17) is arranged on the inner wall of the positioning block (12).

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