CN217019022U

CN217019022U - Laser welding device

Info

Publication number: CN217019022U
Application number: CN202123448291.5U
Authority: CN
Inventors: 张建华; 蒋崟; 孙乔; 张德胜
Original assignee: Superstar Shenzhen Automation Co ltd
Current assignee: Superstar Shenzhen Automation Co ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-07-22
Anticipated expiration: 2031-12-30

Abstract

The present invention provides a laser welding apparatus, comprising: the mounting rack is internally provided with a light reflecting channel and is provided with a first end and a second end; the light adjusting device is arranged on the mounting rack; the first lens is arranged in the light reflecting channel and is positioned below the dimming device; the second lens is arranged at the first end of the mounting frame and is opposite to the first lens; the image acquisition device is arranged at the second end of the mounting rack, and the optical centers of the first lens, the second lens and the image acquisition device are on the same straight line; the first lens can reflect laser emitted from the interior of the dimming device onto the second lens, and imaging on the second lens can be transmitted into the image acquisition device through the first lens. The technical scheme of the utility model can effectively solve the problem of low welding precision of the laser welding device in the related technology.

Description

Laser welding device

Technical Field

The utility model relates to the field of laser welding, in particular to a laser welding device.

Background

With the rapid development of laser technology, the demand for the use amount of laser equipment is continuously improved. Most of the existing laser welding equipment for production lines are positioned by a pure mechanical jig, and the consistency of welding products is required to be high. The method for improving the welding precision is that an image acquisition device is installed beside a welding station, the image acquisition device is used for shooting the actual falling point of laser, an image of the laser when the laser is positioned at a preset falling point is stored in the image acquisition device, and the chip arranged in the image acquisition device is used for comparing the actual falling point of the laser with the preset falling point, so that the conclusion that whether the actual falling point of the laser deviates from the preset falling point is obtained.

However, the mode of arranging the image acquisition device beside the welding station needs to additionally arrange a station for the image acquisition device, and occupies the space on the production line. In addition, because the image acquisition visual angle of the image acquisition device is single, when the laser drop point is far away from the image acquisition device, the feedback result of the image acquisition device to the laser drop point is easy to be inaccurate, and the welding precision of laser welding is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a laser welding device to solve the problem of low welding precision of the laser welding device in the related art.

In order to achieve the above object, the present invention provides a laser welding apparatus comprising: the mounting rack is internally provided with a light reflecting channel and is provided with a first end and a second end; the light adjusting device is arranged on the mounting rack; the first lens is arranged in the light reflecting channel and is positioned below the light adjusting device; the second lens is arranged at the first end of the mounting rack and is opposite to the first lens; the image acquisition device is arranged at the second end of the mounting rack, and the optical centers of the first lens, the second lens and the image acquisition device are on the same straight line; the first lens can reflect laser emitted from the interior of the dimming device onto the second lens, and imaging on the second lens can be transmitted into the image acquisition device through the first lens.

Further, the first lens is capable of reflecting light having a wavelength between 1050nm and 1100nm and is capable of transmitting light having a wavelength between 380nm and 760 nm.

Furthermore, the light modulation device is vertically arranged on the mounting rack, and an included angle between the reflecting surface of the first lens and the central line of the light modulation device is 45 degrees.

Further, the laser welding apparatus further includes: the mirror that shakes, the mirror that shakes include a plurality of adjusting lens, and one of a plurality of adjusting lens forms the second lens, and a plurality of adjusting lens can reflect laser in order to form the laser light path, and the mirror that shakes still includes drive adjusting lens pivoted drive arrangement, and drive arrangement drive adjusting lens rotates in order to adjust the landing point on laser light path.

Further, the image acquisition device comprises an image acquisition part and an image processing part electrically connected with the image acquisition part.

Furthermore, the image acquisition device comprises an image acquisition part and an image processing part electrically connected with the image acquisition part, the galvanometer further comprises a control device electrically connected with the driving device, and the control device is in communication connection with the image processing part.

Further, the laser welding apparatus further includes: and the field lens is arranged below the laser outlet of the vibrating lens.

Further, the laser welding apparatus further includes: the light source is arranged below the field lens, and an avoiding hole for avoiding the field lens is arranged in the light source.

Further, the light source comprises a light source body and a light source support arranged on the light source body, and the light source body is adjustably arranged on the mounting frame through the light source support.

Further, the laser welding apparatus further includes: the lifting structure comprises a lifting platform and a lifting arm arranged on the lifting platform, one end of the lifting arm is connected with the lifting platform in a sliding mode, and the other end of the lifting arm is connected with the mounting frame.

By applying the technical scheme of the utility model, the first lens can reflect laser and transmit visible light. Specifically, laser shines on first lens behind the dimming device, and first lens is on laser reflection to the second lens, and laser can form actual placement on the work piece on can projecting the work piece after the reflection of second lens. The installation frame is provided with the image acquisition device, and the image acquisition device can acquire images of the workpiece and the actual laser drop point. Specifically, the optical path S2 for imaging transmission acquired by the image acquisition device is the same as the optical path S1 for laser reflection but in the opposite direction. The second lens can acquire the formation of image of the actual point of falling of laser on the work piece, and image acquisition device can acquire the formation of image on the second lens through first lens. An operator can adjust the first lens and/or the second lens according to the laser actual falling point image acquired by the image acquisition device, so that the actual falling point of the laser coincides with the preset falling point, and the welding precision of the welding device is ensured. In addition, the optical path S2 of imaging transmission acquired by the image acquisition device is the same as the optical path S1 of laser reflection, so that the image acquisition device has traceability on the actual laser drop point, the accuracy of acquiring the actual laser drop point position by the image acquisition device is improved, and the welding precision of the welding device is improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate embodiment(s) of the utility model and together with the description serve to explain the utility model and not to limit the utility model. In the drawings:

fig. 1 shows a schematic perspective view of an embodiment of a laser welding device according to the utility model; and

fig. 2 shows a schematic diagram of the laser welding device of fig. 1.

Wherein the figures include the following reference numerals:

1. a light reflecting channel; s1, reflecting the laser; s2, imaging the transmitted light path; 10. a mounting frame; 20. a light adjusting device; 30. a first lens; 40. a second lens; 50. an image acquisition device; 60. a galvanometer; 70. a field lens; 80. a light source; 81. a light source body; 82. a light source holder; 83. avoiding holes; 90. a lifting structure; 91. a lifting platform; 92. a lifting arm; 100. and (5) a workpiece.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1 and 2, the laser welding apparatus of the present embodiment includes: the light-adjusting device comprises a mounting rack 10, a light-adjusting device 20, a first lens 30, a second lens 40 and an image acquisition device 50. Wherein, the mounting frame 10 is provided with a light reflecting channel 1 therein, and the mounting frame 10 is provided with a first end and a second end; the light adjusting device 20 is disposed on the mounting frame 10; the first lens 30 is disposed in the light reflecting channel 1 and below the light adjusting device 20; the second lens 40 is disposed at a first end of the mounting frame 10 and opposite to the first lens 30; the image acquisition device 50 is arranged at the second end of the mounting frame 10, and the optical centers of the first lens 30, the second lens 40 and the image acquisition device 50 are on the same straight line; wherein the first lens 30 can reflect the laser light emitted from the light adjusting device 20 onto the second lens 40, and the image formed on the second lens 40 can be transmitted to the image capturing device 50 through the first lens 30.

With the technical solution of the embodiment, the first lens 30 can reflect laser light and transmit visible light. Specifically, the laser light passes through the light adjusting device 20 and then irradiates on the first lens 30, the first lens 30 reflects the laser light onto the second lens 40, and the laser light can be projected onto the workpiece 100 after being reflected by the second lens 40, so that an actual landing point is formed on the workpiece 100. The mounting frame 10 of the present application is provided with the image acquisition device 50, and the image acquisition device 50 can acquire images of the workpiece 100 and the actual laser drop point. Specifically, the optical path S2 for imaging transmission acquired by the image acquisition device 50 is the same as the optical path S1 for laser reflection but in the opposite direction. The second lens 40 is capable of acquiring an image of the actual point of laser landing on the workpiece 100 and the image capture device 50 is capable of acquiring an image through the first lens 30 onto the second lens 40. An operator can adjust the first lens and/or the second lens 40 according to the laser actual falling point image acquired by the image acquisition device 50, so that the actual falling point of the laser coincides with the preset falling point, and the welding precision of the welding device is ensured. In addition, the light path S2 of imaging transmission acquired by the image acquisition device 50 is the same as the light path S1 of laser reflection, so that the image acquisition device 50 has traceability on the actual laser drop point, thereby improving the accuracy of acquiring the actual laser drop point position by the image acquisition device 50 and being beneficial to improving the welding precision of the welding device.

As shown in fig. 1 and 2, in the present embodiment, the first lens 30 is capable of reflecting light having a wavelength of 1050nm to 1100nm and transmitting light having a wavelength of 380nm to 760 nm. By the structure, the first lens 30 can reflect laser and transmit visible light, the image acquisition device 50 can acquire imaging on the second lens 40 through the first lens 30, and an operator can adjust the first lens and/or the second lens 40 according to the actual laser drop point imaging acquired by the image acquisition device 50, so that the actual laser drop point coincides with the preset drop point, and the welding precision of the welding device is ensured.

As shown in fig. 1 and fig. 2, in the present embodiment, the light modulation device 20 is vertically disposed on the mounting frame 10, and the angle between the reflection surface of the first lens 30 and the center line of the light modulation device 20 is 45 °. In this embodiment, the light adjusting device 20 is a collimator lens, the collimator lens can adjust the divergent laser beam into a parallel laser beam, the first mirror 30 reflects the parallel laser beam onto the second mirror 40, and the second mirror 40 reflects the laser beam onto the workpiece 100 to weld the workpiece. In the above structure, the light adjusting device 20 is disposed perpendicular to the mounting frame 10, the first lens 30 is located right below the light adjusting device 20, and the reflection surface of the first lens 30 forms an included angle of 45 ° with the central line of the light adjusting device 20, so that the parallel light beams emitted from the light adjusting device 20 can be reflected onto the second lens 40 by the first lens 30 as much as possible, and the energy loss of the laser light in the reflection path is reduced.

As shown in fig. 1 and fig. 2, in the present embodiment, the laser welding apparatus further includes a galvanometer 60, the galvanometer 60 includes a plurality of adjusting mirrors, one of the plurality of adjusting mirrors forms the second mirror 40, the plurality of adjusting mirrors can reflect the laser light to form a laser light path, and the galvanometer 60 further includes a driving device for driving the adjusting mirrors to rotate, and the driving device drives the adjusting mirrors to rotate to adjust the falling point of the laser light path. In the above structure, the laser shines on first lens 30 after light adjusting device 20, and first lens 30 reflects laser to second lens 40, and second lens 40 reflects laser to other regulation lenses in the galvanometer 60 again, and after the reflection of other regulation lenses in the galvanometer 60, the laser is worn out from the laser outlet of galvanometer 60 and is projected on the work piece. The actual falling point of the laser is adjusted through the vibrating mirror 60 in the structure, so that the laser welding device is changed from a single-spot welding device to a welding device with the laser falling point capable of continuously moving, and the universality of the laser welding device in the embodiment is improved.

As shown in fig. 1 and 2, in the present embodiment, the image pickup device 50 includes an image pickup portion and an image processing portion electrically connected to the image pickup portion. In the above structure, the image capturing unit can acquire an image on the second lens 40, and the image on the second lens 40 can reflect actual placement information of the laser. The preset falling point information of the laser is prestored in the image processing part, the image acquisition part transmits the acquired actual falling point information of the laser to the image processing part, the actual falling point information of the laser and the preset falling point information are compared through the image processing part, an operator can adjust the first lens and/or the second lens according to a comparison result obtained by the image acquisition device 50, the actual falling point of the laser is matched with the preset falling point, and the welding precision of the laser welding device is improved.

As shown in fig. 1 and fig. 2, in the present embodiment, the image capturing device 50 includes an image capturing portion and an image processing portion electrically connected to the image capturing portion, and the galvanometer 60 further includes a control device electrically connected to the driving device, and the control device is in communication connection with the image processing portion. In the above structure, the image capturing section can acquire an image on the second lens 40, and the image on the second lens 40 can reflect actual landing point information of the laser. The image processing part prestores the preset falling point information of the laser, the image acquisition part transmits the acquired actual falling point information of the laser to the image processing part, the image processing part compares the actual falling point information of the laser with the preset falling point information, and if the offset of the actual falling point and the preset falling point of the laser is in a preset range, the adjusting lens in the galvanometer 60 does not need to change position. If the deviation amount of the actual falling point and the preset falling point of the laser is beyond the preset range, the image processing part transmits an adjusting signal to the control device, and the control device controls the driving device to adjust the position of the adjusting lens so that the deviation amount of the actual falling point and the preset falling point of the laser is within the preset range.

In this embodiment, the image capturing device 50 is a camera.

As shown in fig. 1, in the present embodiment, the laser welding apparatus further includes a field lens 70, and the field lens 70 is disposed below the laser exit of the galvanometer 60. In the above structure, the laser beam emitted from the galvanometer 60 may have insufficient energy density, which may result in weak welding of the workpiece 100, the field lens 70 may function to converge the laser beam, the converged laser beam forms a laser focus, and the energy density of the laser focus is high, so that the laser focus falls on the workpiece and welds the workpiece, which may improve the welding effect of the workpiece.

As shown in fig. 1, in the present embodiment, the laser welding apparatus further includes a light source 80, the light source 80 is disposed below the field lens 70, and an avoiding hole 83 for avoiding the field lens 70 is disposed in the light source 80. In the above structure, when the image acquired by the image acquisition device 50 is dark, the light source is turned on to illuminate the visual field above the workpiece, and the brightness of the image acquired by the image acquisition device 50 is improved, so that the image acquisition device 50 can compare and process the acquired imaging information conveniently. Specifically, the light source 80 is provided with an avoidance hole 83 for avoiding the field lens 70, and the avoidance hole 83 can avoid the laser beam passing through the field lens 70, so that the welding operation of the laser is not affected while the view above the workpiece is illuminated.

As shown in fig. 1, in the present embodiment, the light source 80 includes a light source body 81 and a light source bracket 82 disposed on the light source body 81, and the light source body 81 is adjustably disposed on the mounting frame 10 through the light source bracket 82. In the above structure, the light source bracket 82 is disposed on the light source body 81 and extends upward, the mounting frame 10 has a connection hole for inserting the light source bracket 82, the light source bracket 82 is in interference fit with a hole wall of the connection hole, and an operator can adjust the length of the light source bracket 82 extending into the connection hole to adjust the distance from the light source body 81 to the workpiece, so that the image acquisition device 50 obtains an image with suitable brightness.

As shown in fig. 1, in the present embodiment, the laser welding apparatus further includes a lifting structure 90, the lifting structure 90 includes a lifting table 91 and a lifting arm 92 disposed on the lifting table 91, one end of the lifting arm 92 is slidably connected to the lifting table 91, and the other end of the lifting arm 92 is connected to the mounting block 10. Specifically, the field lens 70 can play a role in converging the laser beam, and the adjustment of the position of the lifting arm 92 can enable the focal point of the laser beam to fall on the workpiece, so that the welding effect of the laser welding device on the workpiece is improved. It should be noted that, the distance from the focal point formed after the laser beam is converged by the same field lens to the lower surface of the field lens is fixed, but when different workpieces are welded, because of the height difference between the workpieces, the height of the mounting frame 10 needs to be adjusted, so that the focal point of the laser beam just falls on the surface of the workpiece, which is convenient for welding the workpieces. In the above structure, the lifting arm 92 can move on the lifting table to drive the mounting frame to be close to or away from the workpiece, so that the focus of the laser beam is conveniently dropped on the surface of the workpiece.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A laser welding apparatus, comprising:

a mounting bracket (10), wherein the mounting bracket (10) is provided with a light reflecting channel (1) therein, and the mounting bracket (10) is provided with a first end and a second end;

the dimming device (20) is arranged on the mounting rack (10);

the first lens (30) is arranged in the light reflecting channel (1) and is positioned below the dimming device (20);

the second lens (40) is arranged at the first end of the mounting frame (10) and is opposite to the first lens (30);

the image acquisition device (50) is arranged at the second end of the mounting rack (10), and the optical centers of the first lens (30), the second lens (40) and the image acquisition device (50) are on the same straight line;

wherein the first lens (30) is capable of reflecting laser light emitted from within the dimming device (20) onto the second lens (40), and imaging on the second lens (40) is capable of being transferred through the first lens (30) into the image capture device (50).

2. The laser welding device according to claim 1, characterized in that the first mirror (30) is capable of reflecting light with a wavelength between 1050nm and 1100nm and of transmitting light with a wavelength between 380nm and 760 nm.

3. The laser welding device according to claim 1, wherein the light adjusting device (20) is vertically arranged on the mounting frame (10), and the angle between the reflecting surface of the first lens (30) and the center line of the light adjusting device (20) is 45 °.

4. The laser welding apparatus according to claim 1, characterized in that the laser welding apparatus further comprises:

mirror (60) shakes, mirror (60) shakes includes a plurality of adjusting lens, and is a plurality of one of adjusting lens forms second lens (40), and is a plurality of adjusting lens can reflect laser is in order to form the laser light path, mirror (60) shakes still including the drive adjust lens pivoted drive arrangement, the drive arrangement drive adjust the lens and rotate in order to adjust the drop point of laser light path.

5. The laser welding device according to claim 1, wherein the image acquisition device (50) comprises an image acquisition part and an image processing part electrically connected to the image acquisition part.

6. The laser welding device according to claim 4, wherein the image acquisition device (50) comprises an image acquisition part and an image processing part electrically connected with the image acquisition part, and the galvanometer (60) further comprises a control device electrically connected with the driving device, and the control device is in communication connection with the image processing part.

7. The laser welding apparatus according to claim 4, further comprising:

and the field lens (70) is arranged below the laser outlet of the galvanometer (60).

8. The laser welding apparatus according to claim 7, further comprising:

the light source (80) is arranged below the field lens (70), and an avoiding hole (83) for avoiding the field lens (70) is formed in the light source (80).

9. The laser welding apparatus according to claim 8, wherein the light source (80) includes a light source body (81) and a light source bracket (82) provided to the light source body (81), and the light source body (81) is adjustably provided to the mount (10) by the light source bracket (82).

10. The laser welding apparatus according to claim 1, characterized in that the laser welding apparatus further comprises:

elevation structure (90), elevation structure (90) include elevating platform (91) and set up in lift arm (92) on elevating platform (91), the one end of lift arm (92) with elevating platform (91) sliding connection, the other end of lift arm (92) with mounting bracket (10) are connected.