Rapid focusing device and system for laser welding

Abstract

The utility model provides a laser welding rapid focusing device and system, and belongs to the field of lithium battery processing. The device comprises a laser infrared device, a laser transmitter, a fixing plate and a mechanical arm, the laser infrared device and the laser transmitter are arranged on the fixing plate, the mechanical arm is configured to be capable of clamping the fixing plate to move in the horizontal direction or the vertical direction, and the transmitting end of the laser infrared device and the transmitting end of the laser transmitter are arranged at an angle. By adopting the laser welding rapid focusing device and system provided by the embodiment of the utility model, the problem of low focusing accuracy of laser welding in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery processing, in particular to a laser welding fast focusing device and system. Background Art

[0002] In the lithium battery industry, laser welding has the characteristics of high energy density, small welding deformation, high weld quality, wide applicability, high degree of automation and less spatter, and its frequency of use in the production process is increasing.

[0003] In the existing related technologies, laser welding directly uses a robotic arm to control the movement of the laser, and moves the laser to the welding point through manual experience or a set program. There is a lack of a device for accurately positioning the welding point. Welding using this method will cause the laser focus to be too high or too low, resulting in more dispersed welding energy, thereby resulting in lower welding strength. In addition, when welding highly reflective materials, it is difficult to judge with the naked eye whether the laser spot is focused when the welding trajectory is welded at different angles, resulting in a focus that is too high or too low.

[0004] The focusing accuracy of laser welding in the existing related technology is low. Utility Model Content

[0005] The embodiment of the utility model provides a laser welding fast focusing device and system, which can solve the problem of low focusing accuracy of laser welding in the prior art. The technical solution is as follows:

[0006] In a first aspect, a laser welding fast focusing device comprises: a laser infrared device, a laser transmitter, a fixing plate and a mechanical arm,

[0007] The laser infrared device and the laser transmitter are arranged on the fixed plate, the mechanical arm is configured to clamp the fixed plate and move in a horizontal direction or a vertical direction, and the transmitting end of the laser infrared device and the transmitting end of the laser transmitter are arranged at an angle

[0008] Optionally, the fixing plate is rotatably disposed on the robotic arm.

[0009] Optionally, the laser infrared device and the laser emitter are rotatably arranged on the fixed plate.

[0010] Optionally, the focal length of the laser transmitter is adjustable.

[0011] Optionally, the emitting end of the laser infrared device is provided with a light shielding hole, and the size of the light shielding hole is adjustable.

[0012] Optionally, a filter is provided at the transmitting end of the laser infrared device.

[0013] Optionally, a plurality of filters are provided, and the plurality of filters have different colors.

[0014] In a second aspect, a laser welding rapid focusing system includes the aforementioned laser welding rapid focusing device, and also includes a lifting platform, on which a workpiece is arranged, and the lifting platform is arranged on one side of the laser welding rapid focusing device, and the lifting platform is configured to drive the workpiece to approach or move away from the laser emitter.

[0015] The beneficial effects brought by the technical solution provided by the embodiment of the utility model include at least:

[0016] The utility model provides a laser welding fast focusing device and system, in which a laser infrared device is arranged on one side of a laser transmitter. Since the diameter of a straight infrared beam emitted by the laser infrared device is fixed, when the laser emitted by the laser transmitter and the straight infrared emitted by the laser infrared device intersect on a workpiece, by comparing the spot size of the straight infrared projected on the workpiece with the spot size of the laser transmitter mapped on the workpiece, it is determined whether the current state is the optimal welding distance. The position of the workpiece and the laser transmitter is adjusted by a mechanical arm to find the optimal welding distance, which can effectively solve the problem of low focusing accuracy of laser welding in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the utility model;

[0019] Figure 2 This is a schematic diagram of a light beam irradiating a workpiece provided by an embodiment of the utility model;

[0020] Figure 3 This is a front view of the overall structure of the system provided by the embodiment of the utility model;

[0021] Figure 4 It is a top view schematic diagram of the lifting platform provided by the embodiment of the utility model.

[0022] In the figure: 1-laser infrared device; 11-shading hole; 12-filter; 2-laser transmitter; 3-fixed plate; 4-mechanical arm; 5-lifting platform; 51-base; 52-vertical guide rail; 53-horizontal guide rail; 54-processing table. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solution and advantages of the present invention more clear, the implementation mode of the present invention will be further described in detail below with reference to the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the overall structure of the device provided by the embodiment of the utility model; Figure 2 This is a schematic diagram of a light beam irradiating a workpiece provided by an embodiment of the utility model; Figure 3 This is a front view of the overall structure of the system provided by the embodiment of the utility model; Figure 4 Schematic diagram of a top view of a lifting platform provided by an embodiment of the utility model. Figures 1 to 4 A laser welding rapid focusing device shown includes: a laser infrared device 1, a laser emitter 2, a fixed plate 3 and a robotic arm 4. The laser infrared device 1 and the laser emitter 2 are arranged on the fixed plate 3. The robotic arm 4 is configured to clamp the fixed plate 3 and move in a horizontal direction or a vertical direction. The emitting end of the laser infrared device 1 and the emitting end of the laser emitter 2 are arranged at an angle.

[0025] For example, in the embodiment of the utility model, the laser infrared device 1 is built with a focusing mirror, so that the laser energy emitted by the laser oscillator is concentrated. However, due to the use of the focusing mirror, the laser beam emitted from the laser infrared device 1 is cone-shaped, such as Figure 2 As shown, it is a schematic diagram of the light beam irradiating the workpiece provided by the embodiment of the utility model. In the lithium battery laser welding, when the spot diameter of the laser irradiated on the workpiece is 0.1-0.3mm, the energy of the laser is most concentrated, and the welding efficiency is the highest at this time. The diameter of the infrared beam emitted by the laser infrared device 1 is fixed to 0.1mm. The laser infrared device 1 is set on one side of the laser emitter 2. When laser welding is performed, the laser infrared device 1 and the laser emitter 2 simultaneously emit light beams to the workpiece. By adjusting the mechanical arm 4, when the light beam emitted by the laser emitter 2 irradiates the workpiece, the laser infrared device 1 and the laser emitter 2 emit light beams to the workpiece. When the spot diameter on the workpiece coincides with the spot diameter irradiated by the laser emitter 2 on the workpiece, the laser energy irradiated by the laser emitter 2 on the workpiece is most concentrated, which is conducive to the smooth progress of laser welding, thereby improving the welding performance and reducing energy loss. Compared with the traditional technology, the laser emitter 2 is aimed at the workpiece only through manual experience or a pre-set program. In this device, a laser infrared device 1 is added to judge the laser beam emitted by the laser emitter 2, so that the energy of the laser beam emitted by the laser emitter 2 irradiated on the workpiece is most concentrated.

[0026] A laser welding fast focusing device provided by an embodiment of the utility model comprises a laser infrared device 1 arranged on one side of a laser emitter 2. Since the diameter of a straight infrared beam emitted by the laser infrared device 1 is fixed, when the laser emitted by the laser emitter 2 and the straight infrared emitted by the laser infrared device 1 intersect on a workpiece, by comparing the spot size of the straight infrared projected on the workpiece with the spot size of the laser emitter 2 mapped on the workpiece, it is determined whether the current state is the optimal welding distance. The position of the workpiece and the laser emitter 2 is adjusted by a robot arm 4 to find the optimal welding distance, which can effectively solve the problem of low focusing accuracy of laser welding in the prior art.

[0027] Optionally, the fixing plate 3 is rotatably disposed on the robot arm 4 .

[0028] Exemplarily, in an embodiment of the utility model, the fixing plate is rotatably set on the robot arm 4, so that the fixing plate 3 carrying the laser infrared device 1 and the laser emitter 2 can be rotatably set on the robot arm 4, so that the device can not only weld the workpiece in a horizontal position, but also weld the workpiece in a vertical position, thereby improving the practicality of the laser welding rapid focusing device.

[0029] Optionally, the laser infrared device 1 and the laser emitter 2 are rotatably disposed on the fixed plate 3 .

[0030] Illustratively, in an embodiment of the utility model, the laser infrared device 1 and the laser emitter 2 are rotatably arranged on a fixed plate 3, and the laser emitter 2 can be adjusted so that the laser is aimed at welding points at different positions for welding, and the laser infrared device can also rotate with the laser emitter 2 and be adjusted to the position where welding is required, thereby increasing the degree of freedom of the device and improving the operating convenience of the laser welding rapid focusing device.

[0031] Optionally, the focal length of the laser emitter 2 is adjustable.

[0032] Illustratively, in an embodiment of the utility model, in the case of partial welding, when it is inconvenient for the robot 4 to adjust its position due to interference between the workpieces, the focal length of the laser emitter 2 is adjustable, so that there is no need to adjust the relative distance between the workpiece and the laser emitter 2 through the robot 4 to achieve the optimal welding distance, thereby further improving the operational convenience of the laser welding rapid focusing device.

[0033] Optionally, a light shielding hole 11 is provided at the emitting end of the laser infrared device 1 , and the size of the light shielding hole 11 is adjustable.

[0034] Exemplarily, in an embodiment of the utility model, a light shielding hole 11 is provided at the emitting end of the laser infrared device 1, and the size of the light shielding hole 11 is adjustable, so that the diameter of the infrared light beam emitted by the laser infrared device 1 can be changed. When different laser emitters 2 are used to weld the workpiece, the light shielding hole 11 can be adjusted to adapt to the spot diameter of different laser emitters 2 that need to be irradiated on the workpiece, so as to achieve the optimal welding distance, thereby further improving the practicality of the laser welding rapid focusing device.

[0035] Optionally, a filter 12 is provided at the emission end of the laser infrared device 1 .

[0036] Exemplarily, in the embodiment of the utility model, it is necessary to compare the light spot irradiated on the workpiece by the light beam emitted by the laser emitter 2 with the position and size of the light spot irradiated on the workpiece by the laser emitter 2, and the light spot irradiated on the workpiece by the laser infrared device 1 is used as a reference. In order to improve the recognition of the light spot irradiated on the workpiece by the laser infrared device 1, a filter 12 is provided at the emitting end of the laser infrared device 1, so that the light spot irradiated on the workpiece by the laser infrared device 1 is easier to identify, which is convenient for the operator to compare the light spot irradiated on the workpiece by the light beam emitted by the laser emitter 2 with the light spot irradiated on the workpiece by the laser emitter 2, thereby further improving the operating convenience of the laser welding fast focusing device.

[0037] Optionally, a plurality of filters 12 are provided, and the plurality of filters 12 have different colors.

[0038] Illustratively, in an embodiment of the utility model, by setting a plurality of filters 12 with different colors, filters 12 of appropriate colors can be selected when welding workpieces of different materials or colors, so that the color of the light spot irradiated on the workpiece by the laser infrared device 1 is easier to identify, thereby further improving the operational convenience of the laser welding rapid focusing device.

[0039] A laser welding rapid focusing system includes the aforementioned laser welding rapid focusing device, and also includes a lifting platform 5, on which a workpiece is arranged. The lifting platform 5 is arranged on one side of the laser welding rapid focusing device, and the lifting platform 5 is configured to drive the workpiece to approach or move away from a laser emitter 2.

[0040] Exemplarily, in an embodiment of the utility model, the lifting platform 5 includes a base 51, a vertical guide rail 52, a horizontal guide rail 53 and a processing table 54. The vertical guide rail 52 is vertically arranged on the base 51, the horizontal guide rail 53 is arranged parallel to the base 51, the horizontal guide rail 53 is slidably arranged on the vertical guide rail 52, the processing table 54 is slidably arranged on the horizontal guide rail 53, and the workpiece is arranged on the processing table 54. By setting the lifting platform 5, the position of the workpiece relative to the laser emitter 2 can be adjusted by the lifting platform 5. When the robot arm 4 does not move, the laser welding work can also be completed by the lifting platform 5, thereby further improving the practicality of the laser welding rapid focusing device.

[0041] Unless otherwise defined, the technical terms or scientific terms used herein shall have the usual meanings understood by persons with ordinary skills in the field to which the utility model belongs. The words "first", "second" and similar words used in the specification and claims of the utility model patent application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantity limitation, but indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0042] The above description is only an optional embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A laser welding fast focusing device, characterized in that: include: Laser infrared device (1), laser transmitter (2), fixing plate (3) and mechanical arm (4), The laser infrared device (1) and the laser emitter (2) are arranged on the fixed plate (3), the mechanical arm (4) is configured to clamp the fixed plate (3) and move in a horizontal direction or a vertical direction, and the emitting end of the laser infrared device (1) and the emitting end of the laser emitter (2) are arranged at an angle.

2. A laser welding rapid focusing device according to claim 1, characterized in that: The fixing plate (3) is rotatably arranged on the mechanical arm (4).

3. The laser welding rapid focusing device according to claim 1, characterized in that: The laser infrared device (1) and the laser emitter (2) are rotatably arranged on the fixing plate (3).

4. The laser welding rapid focusing device according to claim 1, characterized in that: The focal length of the laser emitter (2) is adjustable.

5. The laser welding rapid focusing device according to claim 1, characterized in that: The emitting end of the laser infrared device (1) is provided with a light shielding hole (11), and the size of the light shielding hole (11) is adjustable.

6. The laser welding rapid focusing device according to claim 1, characterized in that: The emission end of the laser infrared device (1) is provided with a filter (12).

7. The laser welding rapid focusing device according to claim 6, characterized in that: A plurality of filters (12) are provided, and the colors of the plurality of filters (12) are different.

8. A laser welding rapid focusing system, comprising a laser welding rapid focusing device according to any one of claims 1 to 7, and further comprising a lifting platform (5), on which a workpiece is arranged, and the lifting platform (5) is arranged on one side of the laser welding rapid focusing device, and the lifting platform (5) is configured to drive the workpiece to approach or move away from the laser emitter (2).

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