Laser welding light path system

Abstract

The utility model relates to the technical field of laser welding machines, in particular to a laser welding light path system which comprises a mounting seat, the mounting seat comprises a vertical plate and a transverse plate perpendicularly connected with the vertical plate, and a total reflection mirror unit, a laser generator, a semi-reflection mirror unit and a first 45-degree reflection mirror unit are sequentially arranged on the outer side face of the vertical plate from bottom to top. The first beam expander unit, the second beam expander unit, the second 45-degree reflector unit and the third 45-degree reflector unit are sequentially arranged on the top face of the transverse plate, the first beam expander unit is located on the output side of the first 45-degree reflector unit, the camera device is located on the output side of the second 45-degree reflector unit, and the focus lens unit is located on the output side of the third 45-degree reflector unit. According to the laser welding light path system, the irradiation path of laser can be changed, the length of the laser welding light path system is greatly shortened, the laser welding light path system is applied to the laser welding machine, the height of the laser welding machine is not increased, and the size of the laser welding machine is greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of laser welding machines, in particular to a laser welding optical path system. Background Art

[0002] The principle of laser welding is to use high-energy laser pulses to heat a local position of a workpiece, so that the local position of the workpiece melts to complete the laser welding work. In the prior art, generally, a laser welding machine is used to perform laser welding on a workpiece, and the laser welding optical path system is a core component of the laser welding machine. In the existing patent, the applicant applied for a Chinese patent with the application number 202023002052.2 on December 11, 2020, which discloses a micro laser welding optical path system with video display, including a laser generating device, an optical path conversion device, a spot adjusting device, a welding device and a monitoring device. The laser generating device is used to emit pulsed laser, the optical path conversion device is used to change the propagation direction of the pulsed laser, the spot adjusting device is used to adjust the size of the spot, the welding device is used to focus the pulsed laser on the welding part for laser welding, and the monitoring device is used to monitor the welding work of the welding device in real time. The pulsed laser emitted by the laser generating device sequentially passes through the optical path conversion device, the spot adjusting device and the welding device. The laser irradiation path of this patent document is long, which is easy to cause laser loss, and the occupied area in the width direction is large, making the volume of the laser welding machine large.

[0003] In addition, the applicant applied for a Chinese patent document with the application number 202122033695.1 on August 26, 2021, which discloses an improved laser welding optical path system, including a laser generator, a total reflection mirror unit, a semi-reflection mirror unit, a first beam expander unit, a second beam expander unit arranged on the output side of the first beam expander unit, a first 45° reflection mirror unit arranged on the output side of the second beam expander unit, a focusing mirror unit located below the first 45° reflection mirror unit, a second 45° reflection mirror unit arranged above the first 45° reflection mirror unit, a camera device arranged on the output side of the second 45° reflection mirror unit, a display controller electrically connected to the camera device, and a microscope located above the second 45° reflection mirror unit. Although the laser irradiation path of this patent document is shortened, the occupied area in the length direction is large, making the laser welding machine longer and not conducive to reducing the volume of the laser welding machine.

[0004] Therefore, the defects are very obvious and a solution is urgently needed. Summary of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide a laser welding optical path system.

[0006] To achieve the above object, the utility model adopts the following technical solutions:

[0007] A laser welding optical path system, which comprises a mounting base, a total reflection mirror unit, a laser generator, a semi-reflection mirror unit, a first 45° reflection mirror unit, a first beam expander unit, a second beam expander unit, a second 45° reflection mirror unit, a camera device, a third 45° reflection mirror unit and a focusing mirror unit. The camera device is horizontally arranged, and the focusing mirror unit is vertically arranged. The mounting base includes a vertical plate and a horizontal plate perpendicularly connected to the vertical plate. The total reflection mirror unit, the laser generator, the semi-reflection mirror unit and the first 45° reflection mirror unit are sequentially arranged on the outer side surface of the vertical plate from bottom to top. The total reflection mirror unit is located at one end of the laser generator, and the total reflection mirror unit is arranged opposite to the semi-reflection mirror unit. The first 45° reflection mirror unit is located at the corner of the vertical plate and the horizontal plate. The first beam expander unit, the second beam expander unit, the second 45° reflection mirror unit and the third 45° reflection mirror unit are sequentially arranged on the top surface of the horizontal plate. The first beam expander unit is located on the output side of the first 45° reflection mirror unit. The camera device is located on the output side of the second 45° reflection mirror unit. The focusing mirror unit is located on the output side of the third 45° reflection mirror unit. The second 45° reflection mirror unit can transmit laser and reflect visible light. The third 45° reflection mirror unit can reflect part of the visible light, transmit part of the visible light and totally reflect the laser.

[0008] Further, the total reflection mirror unit includes a first lens bracket installed on the vertical plate and a total reflection lens installed on the first lens bracket.

[0009] Further, a red light calibrator is installed on the vertical plate or the first lens bracket. The red light calibrator is located below the total reflection lens, and the first lens bracket can adjust the angle of the total reflection lens.

[0010] Further, the semi-reflection mirror unit includes a second lens bracket installed on the vertical plate and a semi-reflection lens installed on the second lens bracket.

[0011] Further, the first 45° reflection mirror unit includes a cylinder body arranged on the second lens bracket and a first 45° reflection lens installed in the cylinder body. An optical output hole is formed in the side wall of the cylinder body. The included angle between the first 45° reflection lens and the semi-reflection lens is 45°. The included angle between the first 45° reflection lens and the first beam expander unit is 45°. The first beam expander unit is arranged opposite to the first 45° reflection lens through the optical output hole.

[0012] Further, the laser welding optical path system further includes a distance adjusting mechanism installed on the horizontal plate. The first beam expander unit is connected to the distance adjusting end of the distance adjusting mechanism. The first beam expander unit is slidably connected to the horizontal plate. The distance adjusting mechanism is used to adjust the distance between the first beam expander unit and the second beam expander unit.

[0013] Further, the second 45° mirror unit includes a third lens holder mounted on the horizontal plate and a second 45° reflecting lens mounted on the third lens holder. The included angle between the second 45° reflecting lens and the second beam expander unit is 45°, the included angle between the second 45° reflecting lens and the imaging device is 45°, and the second 45° reflecting lens can transmit laser light and reflect visible light.

[0014] Further, the third 45° mirror unit includes a fourth lens holder mounted on the horizontal plate and a third 45° reflecting lens mounted on the fourth lens holder. The included angle between the third 45° reflecting lens and the second beam expander unit is 45°, and the included angle between the third 45° reflecting lens and the focusing lens unit is 45°.

[0015] Further, the horizontal plate is provided with a through hole, the focusing lens unit is mounted on the bottom surface of the horizontal plate, and the focusing lens unit and the third 45° reflecting lens are located on the lower side and the upper side of the through hole respectively.

[0016] Further, the laser welding optical path system further includes a microscope located above the third 45° mirror unit, and the microscope is disposed opposite to the focusing lens unit; the imaging device is electrically connected to a display controller.

[0017] The beneficial effects of the present utility model: In practical applications, the workpiece is placed below the focusing lens unit. The energy emitted by the laser generator undergoes resonance through the total reflection mirror unit and the semi-reflection mirror unit to generate laser light. Then the laser light irradiates on the first 45° mirror unit, and the first 45° mirror unit reflects the laser light at 45° to the first beam expander unit. After the laser light is adjusted in spot size through the first beam expander unit and the second beam expander unit, the laser light passes through the second 45° mirror unit and irradiates on the third 45° mirror unit. The third 45° mirror unit reflects the laser light at 45° to the focusing lens unit, and the laser light passes through the focusing lens unit and irradiates on the workpiece to perform laser welding on the workpiece. At the same time, the visible light reflected by the workpiece passes through the third 45° mirror unit and the second 45° mirror unit in sequence, and the second 45° mirror unit reflects the visible light to the imaging device, and the imaging device captures the process of laser welding in real time. Since the vertical plate is perpendicularly connected to the horizontal plate, the mounting seat is L-shaped, which can change the irradiation path of the laser, greatly shortening the length of the laser welding optical path system. When this laser welding optical path system is applied to a laser welding machine, it not only does not increase the height of the laser welding machine, but also makes reasonable use of the height of the laser welding machine, and greatly reduces the volume of the laser welding machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0019] Figure 2 is a three-dimensional structural schematic diagram of another perspective of the present utility model.

[0020] Explanation of the reference numerals in the drawings:

[0021] 1. Total reflection mirror unit; 2. Laser generator; 3. Half reflection mirror unit; 4. First 45° reflection mirror unit; 5. First beam expander unit; 6. Second beam expander unit; 7. Second 45° reflection mirror unit; 8. Camera device; 9. Third 45° reflection mirror unit; 10. Focusing mirror unit; 11. Vertical plate; 12. Horizontal plate; 13. First lens holder; 14. Total reflection lens; 15. Second lens holder; 16. Half reflection lens; 17. Cylinder; 18. First 45° reflection lens; 19. Light output hole; 20. Distance adjustment mechanism; 21. Third lens holder; 22. Second 45° reflection lens; 23. Fourth lens holder; 24. Third 45° reflection lens; 25. Display controller. Specific embodiments

[0022] For the convenience of understanding by those skilled in the art, the present utility model will be further described below in conjunction with the embodiments and the drawings. The content mentioned in the embodiments does not limit the present utility model.

[0023] As Figure 1 and Figure 2 shown, a laser welding optical path system provided by the present utility model includes a mounting base, a total reflection mirror unit 1, a laser generator 2, a half reflection mirror unit 3, a first 45° reflection mirror unit 4, a first beam expander unit 5, a second beam expander unit 6, a second 45° reflection mirror unit 7, a camera device 8, a third 45° reflection mirror unit 9 and a focusing mirror unit 10. The camera device 8 is horizontally arranged, and the focusing mirror unit 10 is vertically arranged. The mounting base includes a vertical plate 11 and a horizontal plate 12 perpendicularly connected to the vertical plate 11. The total reflection mirror unit 1, the laser generator 2, the half reflection mirror unit 3 and the first 45° reflection mirror unit 4 are sequentially arranged on the outer side surface of the vertical plate 11 from bottom to top. The total reflection mirror unit 1 is located at one end of the laser generator 2, and the total reflection mirror unit 1 is arranged opposite to the half reflection mirror unit 3. The first 45° reflection mirror unit 4 is located at the corner of the vertical plate 11 and the horizontal plate 12. The first beam expander unit 5, the second beam expander unit 6, the second 45° reflection mirror unit 7 and the third 45° reflection mirror unit 9 are sequentially arranged on the top surface of the horizontal plate 12. The first beam expander unit 5 is located on the output side of the first 45° reflection mirror unit 4. The camera device 8 is located on the output side of the second 45° reflection mirror unit 7. The focusing mirror unit 10 is located on the output side of the third 45° reflection mirror unit 9. The second 45° reflection mirror unit 7 can transmit laser and reflect visible light. The third 45° reflection mirror unit 9 can reflect part of the visible light, transmit part of the visible light and totally reflect (100% reflection) the laser.

[0024] In practical applications, the workpiece is placed below the focusing lens unit 10. The energy emitted by the laser generator 2 undergoes resonance through the total reflection mirror unit 1 and the semi-reflection mirror unit 3 to generate laser light. Then, the laser light irradiates on the first 45° reflection mirror unit 4. The first 45° reflection mirror unit 4 emits the laser light at 45° to the first beam expander unit 5. After the laser light passes through the first beam expander unit 5 and the second beam expander unit 6 for adjusting the spot size, the laser light passes through the second 45° reflection mirror unit 7 and irradiates on the third 45° reflection mirror unit 9. The third 45° reflection mirror unit 9 reflects the laser light at 45° to the focusing lens unit 10. The laser light passes through the focusing lens unit 10 and irradiates on the workpiece to perform laser welding on the workpiece. At the same time, the visible light reflected by the workpiece is sequentially reflected by the third 45° reflection mirror unit 9 and the second 45° reflection mirror unit 7. The second 45° reflection mirror unit 7 reflects the visible light onto the imaging device 8, and the imaging device 8 captures the process of laser welding in real time. Since the vertical plate 11 is perpendicularly connected to the horizontal plate 12, the mounting base is L-shaped, which can change the irradiation path of the laser, greatly shortening the length of the laser welding optical path system. When this laser welding optical path system is applied in a laser welding machine, it not only does not increase the height of the laser welding machine, but also reasonably utilizes the height of the laser welding machine, and greatly reduces the volume of the laser welding machine.

[0025] In this embodiment, the total reflection mirror unit 1 includes a first lens holder 13 installed on the vertical plate 11 and a total reflection lens 14 installed on the first lens holder 13. A red light calibrator is installed on the vertical plate 11 or the first lens holder 13. The red light calibrator is located below the total reflection lens 14, and the first lens holder 13 can adjust the angle of the total reflection lens 14. With this structural design, the irradiation path of the laser can be calibrated with the assistance of the red light calibrator; the first lens holder 13 adjusts the angle of the total reflection lens 14 to calibrate the irradiation path of the laser.

[0026] In this embodiment, the semi-reflection mirror unit 3 includes a second lens holder 15 installed on the vertical plate 11 and a semi-reflection lens 16 installed on the second lens holder 15. The first lens holder 13 can adjust the angle of the semi-reflection lens 16. The energy emitted by the laser generator 2 undergoes resonance through the total reflection lens 14 and the semi-reflection lens 16 to generate laser light.

[0027] In this embodiment, the first 45° mirror unit 4 includes a cylinder 17 disposed on the second lens holder 15 and a first 45° mirror lens 18 mounted on the cylinder 17. An optical output hole 19 is formed in the side wall of the cylinder 17. The included angle between the first 45° mirror lens 18 and the semi-reflective lens 16 is 45°. The included angle between the first 45° mirror lens 18 and the first beam expander unit 5 is 45°. The first beam expander unit 5 is disposed opposite to the first 45° mirror lens 18 via the optical output hole 19. The laser is reflected by the first 45° mirror lens 18, passes through the optical output hole 19, and then irradiates on the first beam expander unit 5.

[0028] In this embodiment, the laser welding optical path system further includes a distance adjusting mechanism 20 mounted on the cross plate 12. The first beam expander unit 5 is connected to the distance adjusting end of the distance adjusting mechanism 20. The first beam expander unit 5 is slidably connected to the cross plate 12. The distance adjusting mechanism 20 is used to adjust the distance between the first beam expander unit 5 and the second beam expander unit 6. Specifically, the distance adjusting mechanism 20 can adopt a lead screw module.

[0029] In practical applications, the position of the first beam expander unit 5 is adjusted by the distance adjusting mechanism 20 to adjust the distances between the first beam expander unit 5 and the second beam expander unit 6 and between the first beam expander unit 5 and the first 45° mirror unit 4, so as to be able to adjust the spot size of the laser.

[0030] In this embodiment, the second 45° mirror unit 7 includes a third lens holder 21 mounted on the cross plate 12 and a second 45° mirror lens 22 mounted on the third lens holder 21. The included angle between the second 45° mirror lens 22 and the second beam expander unit 6 is 45°. The included angle between the second 45° mirror lens 22 and the imaging device 8 is 45°. The second 45° mirror lens 22 can transmit the laser and reflect visible light. The visible light is reflected by the second 45° mirror lens 22 to the imaging device 8.

[0031] In this embodiment, the third 45° mirror unit 9 includes a fourth lens holder 23 mounted on the cross plate 12 and a third 45° mirror lens 24 mounted on the fourth lens holder 23. The included angle between the third 45° mirror lens 24 and the second beam expander unit 6 is 45°. The included angle between the third 45° mirror lens 24 and the focusing lens unit 10 is 45°. The laser is reflected by the third 45° mirror lens 24 to the focusing lens unit 10. The visible light is reflected by the third 45° mirror lens 24 to the second 45° mirror lens 22.

[0032] In this embodiment, the cross plate 12 is provided with a through hole. The focusing lens unit 10 is mounted on the bottom surface of the cross plate 12. The focusing lens unit 10 and the third 45° mirror lens 24 are located on the lower side and the upper side of the through hole.

[0033] In this embodiment, the laser welding optical path system further includes a microscope, which is located above the third 45° mirror unit 9 and is disposed opposite to the focusing lens unit 10; the operator can directly observe the laser welding process through the microscope.

[0034] Specifically, the imaging device 8 is a camera, and the imaging device 8 is electrically connected to a display controller 25; the imaging device 8 captures the laser welding process in real time and displays it in real time through the display controller 25, realizing welding visualization and facilitating the teaching and on-site demonstration of welding work.

[0035] In the practical application of the present utility model, part of the visible light passes through the third 45° mirror unit 9 for the microscope to observe, and the other part of the visible light is reflected by the third 45° mirror unit 9 to the second 45° mirror 22, and then reflected by the second 45° mirror 22 to the imaging device 8. Among them, the third 45° mirror unit 9 reflects the 1064-band laser to the focusing lens unit 10.

[0036] All the technical features in this embodiment can be freely combined according to actual needs.

[0037] The above embodiment is a preferred implementation scheme of the present utility model. In addition, the present utility model can also be implemented in other ways. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present utility model.

Claims

1. A laser welding optical path system, characterized in that: The invention comprises a mounting seat, a total reflection mirror unit (1), a laser generator (2), a half reflection mirror unit (3), a first 45° reflection mirror unit (4), a first beam expander unit (5), a second beam expander unit (6), a second 45° reflection mirror unit (7), a camera device (8), a third 45° reflection mirror unit (9) and a focusing mirror unit (10), wherein the camera device (8) is arranged horizontally, and the focusing mirror unit (10) is arranged vertically; the mounting seat comprises a vertical plate (11) and a horizontal plate (12) vertically connected to the vertical plate (11); the total reflection mirror unit (1), the laser generator (2), the half reflection mirror unit (3) and the first 45° reflection mirror unit (4) are arranged in sequence from bottom to top on the outer side surface of the vertical plate (11); the total reflection mirror unit (1) is located at one end of the laser generator (2); The mirror unit (1) and the half-mirror unit (3) are arranged opposite to each other, the first 45° reflector unit (4) is located at the corner of the vertical plate (11) and the horizontal plate (12), the first beam expander unit (5), the second beam expander unit (6), the second 45° reflector unit (7) and the third 45° reflector unit (9) are arranged on the top surface of the horizontal plate (12) in sequence, the first beam expander unit (5) is located on the output side of the first 45° reflector unit (4), the camera device (8) is located on the output side of the second 45° reflector unit (7), the focusing mirror unit (10) is located on the output side of the third 45° reflector unit (9), the second 45° reflector unit (7) can transmit laser light and reflect visible light, and the third 45° reflector unit (9) can reflect visible light and fully reflect laser light.

2. A laser welding optical path system according to claim 1, characterized in that: The total reflection mirror unit (1) comprises a first lens bracket (13) mounted on a vertical plate (11) and a total reflection lens (14) mounted on the first lens bracket (13).

3. A laser welding optical path system according to claim 2, characterized in that: The vertical plate (11) or the first lens bracket (13) is equipped with a red light calibrator, which is located below the total reflection lens (14). The first lens bracket (13) can adjust the angle of the total reflection lens (14).

4. The laser welding optical path system according to claim 1, characterized in that: The semi-reflective mirror unit (3) comprises a second lens bracket (15) mounted on the vertical plate (11) and a semi-reflective lens (16) mounted on the second lens bracket (15).

5. A laser welding optical path system according to claim 4, characterized in that: The first 45° reflector unit (4) comprises a barrel (17) arranged on the second lens bracket (15) and a first 45° reflector lens (18) installed on the barrel (17); a light exit hole (19) is provided on the side wall of the barrel (17); an included angle between the first 45° reflector lens (18) and the semi-reflective lens (16) is 45°; an included angle between the first 45° reflector lens (18) and the first beam expander unit (5) is 45°; the first beam expander unit (5) is arranged relative to the first 45° reflector lens (18) via the light exit hole (19).

6. The laser welding optical path system according to claim 1, characterized in that: The laser welding optical path system also includes a distance adjustment mechanism (20) installed on the horizontal plate (12), the first beam expander unit (5) is connected to the distance adjustment end of the distance adjustment mechanism (20), the first beam expander unit (5) is slidably connected to the horizontal plate (12), and the distance adjustment mechanism (20) is used to adjust the distance between the first beam expander unit (5) and the second beam expander unit (6).

7. The laser welding optical path system according to claim 1, characterized in that: The second 45° reflector unit (7) comprises a third lens bracket (21) mounted on the horizontal plate (12) and a second 45° reflector lens (22) mounted on the third lens bracket (21); the included angle between the second 45° reflector lens (22) and the second beam expander unit (6) is 45°; the included angle between the second 45° reflector lens (22) and the camera device (8) is 45°; and the second 45° reflector lens (22) can transmit laser light and reflect visible light.

8. The laser welding optical path system according to claim 1, characterized in that: The third 45° reflector unit (9) comprises a fourth lens bracket (23) mounted on the horizontal plate (12) and a third 45° reflector lens (24) mounted on the fourth lens bracket (23); the included angle between the third 45° reflector lens (24) and the second beam expander lens unit (6) is 45°; and the included angle between the third 45° reflector lens (24) and the focusing lens unit (10) is 45°.

9. A laser welding optical path system according to claim 8, characterized in that: The horizontal plate (12) is provided with a through hole, the focusing mirror unit (10) is installed on the bottom surface of the horizontal plate (12), and the focusing mirror unit (10) and the third 45° reflecting lens (24) are located at the lower side and the upper side of the through hole.

10. The laser welding optical path system according to claim 1, characterized in that: The laser welding optical path system also includes a microscope, which is located above the third 45° reflector unit (9) and is arranged opposite to the focusing mirror unit (10); the camera device (8) is electrically connected to the display controller (25).

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