Coaxially-mounted welding head structure for laser welding machine
The coaxial mounting structure connected to the robotic arm through the coaxial mounting base solves the problems of large space occupation and poor flexibility of the traditional welding gun structure, and realizes efficient, flexible welding operation and precise control.
Patent Information
- Application Number
- CN202422526420.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-18
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-10-18
AI Technical Summary
The traditional welding gun structure is an off-axis transfer, which occupies a large space and has low space utilization, affecting the working flexibility of the welding gun and is prone to limit problems.
The coaxial mounting base is directly connected to the robotic arm. The laser head is movably connected to the collimating lens and focusing lens through a coaxial connection. The lens bodies are sealed. The lens adopts high-quality quartz wafers and the cooling structure is capillary to achieve a coaxial mounting structure.
The space utilization is improved, the welding gun can be flexibly operated under various working conditions, avoiding position limitation, and realizing various welding forms with high precision, compact structure and strong durability.
Smart Images
Figure CN223325649U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laser welding, and in particular relates to a welding head structure for a coaxially mounted laser welding machine. Background Art
[0002] Laser welding uses high-energy laser pulses to locally heat the material in a small area. The energy of the laser radiation diffuses into the interior of the material through heat conduction, melting the material to form a specific molten pool. It is a new type of welding method, mainly for the welding of thin-walled materials and precision parts. It can realize spot welding, butt welding, lap welding, seal welding, etc. It has a high aspect ratio, small weld width, small heat-affected zone, small deformation, fast welding speed, smooth and beautiful weld, no post-weld treatment or only simple treatment is required, the weld quality is high, there is no air hole, it can be precisely controlled, the focused light spot is small, the positioning accuracy is high, and it is easy to automate.
[0003] The welding head, also known as the welding gun, is one of the core structures of the laser welding machine. It is usually installed directly on the end of the robotic arm that controls its work, and the welding work is performed flexibly under the control of the robotic arm. However, during long-term use, it was found that the traditional welding gun structure still has shortcomings. The welding guns on the market today are usually installed in a transfer connection installation structure, that is, the welding gun body and the robotic arm installation axis are not in a coaxial state, but are in an off-axis state through the transfer connection structure. This will cause the following problems during use. First, the off-axis transfer structure occupies a large space and has low space utilization. Secondly, due to its structural redundancy, it may interfere with the working posture of the welding gun during the process of the robotic arm controlling the welding gun, resulting in problems with welding gun limitation, affecting the working flexibility of the welding gun. Utility Model Content
[0004] The purpose of the present utility model is to provide a coaxially mounted welding head structure for a laser welding machine in order to solve the problems of large space occupation and low space utilization of the heteroaxial transfer structure, as well as the low working flexibility of such welding gun and the susceptibility to position limitation.
[0005] The utility model achieves the above-mentioned purpose through the following technical solutions: comprising a coaxial mounting base, wherein the inner diameter surface of the coaxial mounting base is fixedly connected to a mounting shaft, the coaxial mounting base is directly fixed to the bottom end of the robotic arm, a laser head connecting assembly is provided below the mounting shaft, a collimating lens body is provided below the laser head connecting assembly, a focusing lens body is provided below the collimating lens body, an upper protective lens is installed in the collimating lens body, and a lower protective lens is installed in the focusing lens body;
[0006] The coaxial mounting base is used to connect the robotic arm and the mounting axis. The three are directly connected and installed through a coaxial connection. The upper protective mirror and the collimating mirror body, and the lower protective mirror and the focusing mirror body are all connected in a movable manner.
[0007] Furthermore, a laser head is provided below the focusing lens body, and the laser head, the focusing lens body and the collimating lens body are all connected in sequence through a sealed connection.
[0008] Furthermore, the side wall of the collimating lens body is directly connected to a cooling water interface, and the side wall of the focusing lens body is directly connected to a protective gas interface.
[0009] Beneficial effects: 1. The coaxial mounting structure has higher space utilization than the traditional adapter welding gun head, does not interfere with the welding gun posture, can adapt to various working conditions, and the welding gun can swing freely during the welding operation. Moreover, since the rotation radius of the welding gun of the present application is very small, the problem of position limitation will not easily occur;
[0010] 2. The coaxially mounted welding gun can more easily perform corresponding spot welding in the form of spiral swing, realizing various welding forms such as ∞, straight, circular, square, etc.
[0011] 3. This application uses high-quality quartz wafers with ultra-high light transmittance to ensure welding accuracy. The installation adopts a replaceable design structure, which is convenient for quick replacement at any time. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 This is a schematic diagram of the structure of the utility model
[0013] Figure 2 This is a structural schematic diagram of the utility model from another angle.
[0014] In the figure: 1-coaxial mounting base, 2-mounting axis, 3-laser head connection assembly, 4-collimating lens body, 5-focusing lens body, 6-upper protective lens, 7-lower protective lens, 8-laser head, 9-cooling water interface, 10-shielding gas interface. DETAILED DESCRIPTION
[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described 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 making creative efforts are within the scope of protection of the present invention.
[0016] Combine Figure 1-Figure 2The welding head structure of a coaxially mounted laser welding machine shown in the figure includes a coaxial mounting base 1, the inner diameter surface of the coaxial mounting base 1 is fixedly connected to the mounting shaft 2, the coaxial mounting base 1 is directly fixed to the bottom end of the robotic arm, a laser head connecting assembly 3 is provided below the mounting shaft 2, a collimating lens body 4 is provided below the laser head connecting assembly 3, a focusing lens body 5 is provided below the collimating lens body 4, an upper protective lens 6 is installed in the collimating lens body 4, and a lower protective lens 7 is installed in the focusing lens body 5. The coaxial mounting base 1 is used to connect the robotic arm and the mounting shaft 2. The three are directly connected and installed by coaxial connection. The upper protective lens 6 The connection between the collimating lens body 4 and the lower protective lens 7 and the focusing lens body 5 are all movable. A laser head 8 is provided under the focusing lens body 5. The laser head 8, the focusing lens body 5 and the collimating lens body 4 are connected in sequence through a sealed connection. The side wall of the collimating lens body 4 is directly connected to the cooling water interface 9, and the side wall of the focusing lens body 5 is directly connected to the shielding gas interface 10. During installation, the coaxial installation method has a higher space utilization rate than the traditional adapter welding gun head, does not interfere with the welding gun posture, can adapt to various working conditions, and the welding gun can swing freely during the welding operation. The welding gun of the present application has a very small rotation radius, so the problem of position limitation will not occur easily. On this basis, the welding gun can perform corresponding spot welding in the form of spiral swing, realizing various welding forms such as ∞-shaped, straight-shaped, circular, and square. The total weight of the fuselage of the present application is 2kg, which is light and can be perfectly adapted to a 6kg-class robot. The total length of the fuselage is 44cm and the installation length is only 34cm. Compared with the traditional adapter welding gun, it takes up very little space, so it is more flexible. The upper protective mirror 6 and the lower protective mirror 7 are both installed inside the collimating mirror body 4 and the focusing mirror body 5 through a movable mirror seat, so that it can be realized. The replaceable structural design is convenient for quick replacement. Since the laser head 8, focusing lens 5 and collimating lens 4 are connected in sequence through a sealed connection, the overall sealing of the fuselage is extremely high and can cope with harsh environments. The lenses of this application are all made of high-quality quartz chips with ultra-high light transmittance to ensure welding accuracy. The capillary cooling structure can further improve its durability and maintain the operating temperature for a long time. In general, this application overcomes the problems of insufficient accuracy and flexibility of traditional adapter welding guns, and while improving accuracy, it also simplifies the structure and greatly improves practicality.
[0017] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.
[0018] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.
Claims
1. A welding head structure for a coaxially mounted laser welding machine, characterized in that: The invention comprises a coaxial mounting seat (1), wherein the inner diameter surface of the coaxial mounting seat (1) is fixedly connected to a mounting shaft (2), the coaxial mounting seat (1) is directly fixed to the bottom end of the mechanical arm, a laser head connecting assembly (3) is provided below the mounting shaft (2), a collimating lens body (4) is provided below the laser head connecting assembly (3), a focusing lens body (5) is provided below the collimating lens body (4), an upper protective lens (6) is installed in the collimating lens body (4), and a lower protective lens (7) is installed in the focusing lens body (5); The coaxial mounting seat (1) is used to connect the mechanical arm and the mounting shaft (2), and the three are directly connected and mounted in a coaxial connection manner. The upper protective mirror (6) and the collimating mirror body (4), and the lower protective mirror (7) and the focusing mirror body (5) are both connected in a movable manner.
2. The welding head structure for a coaxially mounted laser welding machine according to claim 1, characterized in that: A laser head (8) is provided below the focusing lens body (5), and the laser head (8), the focusing lens body (5) and the collimating lens body (4) are all connected in sequence through a sealed connection.
3. The welding head structure for a coaxially mounted laser welding machine according to claim 1, characterized in that: The side wall of the collimating lens body (4) is directly connected to a cooling water interface (9), and the side wall of the focusing lens body (5) is directly connected to a protective gas interface (10).