Special vehicle body-in-white welding device

Abstract

This utility model relates to a welding device for the body-in-white of special vehicles, used for welding the body-in-white of special vehicles. It includes a track-type transfer platform vehicle, a first welding rail, a second welding rail, a first welding robot, and a second welding robot. The track-type transfer platform vehicle is equipped with welding positioning fixtures for mounting and fixing the body-in-white of the special vehicle, and the track-type transfer platform vehicle can move along a preset direction. The first and second welding rails are respectively located on both sides of the track-type transfer platform vehicle. The first welding robot is slidably connected to the first welding rail and can rotate toward the welding positioning fixture to weld the body-in-white of the special vehicle. The second welding robot is slidably connected to the second welding rail and can rotate toward the welding positioning fixture to weld the body-in-white of the special vehicle. This utility model can effectively improve the welding flexibility and operational efficiency, shorten the production cycle by more than 30%, and is suitable for mixed-line production of multiple types of special vehicles.

Description

Technical Field

[0001] This utility model relates to the field of special vehicle manufacturing technology, and in particular to a welding device for the body-in-white of special vehicles. Background Technology

[0002] The special vehicle manufacturing sector has now fully entered a small-batch, short-cycle production mode. Under the dual requirements of quality stability and production efficiency, traditional welding processes are facing systemic upgrading pressure. With the development of intelligent manufacturing technology, automated production lines centered on welding robotic arms and intelligent welding robots are gradually becoming widespread, significantly improving the stability and consistency of welding processes.

[0003] In the manufacturing of the body-in-white of special vehicles, the training period for highly skilled welders is as long as 36-60 months, and the industry's talent shortage rate has reached 42.7% (according to the 2023 White Paper on Talent in Special Equipment Manufacturing). This labor-dependent production model directly leads to product qualification rate fluctuations exceeding 15%, and welding time deviations of ±2.8 hours per unit.

[0004] The introduction of robotic welding technology is reshaping the industry ecosystem: through multi-axis linkage mechanisms (6-8 degrees of freedom) and laser vision guidance systems, the repeatability and positioning accuracy of welding trajectories has been improved to ±0.05mm; by adopting an adaptive welding parameter library and digital twin technology, process changeover time has been reduced to 1 / 6 of the traditional mode. This technological breakthrough enables a generational leap in body-in-white manufacturing in terms of process precision, production efficiency, and flexibility, driving the transformation of special vehicle production lines into intelligent manufacturing models of "lights-out factories."

[0005] Existing welding systems suffer from technical problems such as insufficient flexibility, low positioning accuracy, and poor adaptability to various vehicle models, limiting the application scope of welding production lines. Utility Model Content

[0006] The purpose of this utility model is to provide a dual-robot collaborative welding workstation for the body-in-white of special vehicles. Specifically, it provides a body-in-white welding workstation that integrates dual-robot collaborative operation and can be quickly changed, aiming to solve the technical problems of insufficient flexibility, low positioning accuracy and poor adaptability to multiple vehicle models in existing welding systems, and to expand the application scope of welding production lines.

[0007] To address the aforementioned problems, this utility model provides a special vehicle body-in-white welding device for welding special vehicle body-in-whites. The device includes a track-type transfer platform vehicle, a first welding rail, a second welding rail, a first welding robot, and a second welding robot. The track-type transfer platform vehicle is equipped with welding positioning fixtures for mounting and fixing the special vehicle body-in-white, and the track-type transfer platform vehicle is capable of moving along a preset direction. The first and second welding rails are respectively located on both sides of the track-type transfer platform vehicle, and the length directions of both the first and second welding rails are parallel to the preset direction. The first welding robot is slidably connected to the first welding rail and can rotate toward the welding positioning fixture to weld the special vehicle body-in-white. The second welding robot is slidably connected to the second welding rail and can rotate toward the welding positioning fixture to weld the special vehicle body-in-white.

[0008] Preferably, the welding positioning fixture includes a base and multiple inclined positioning support mechanisms. The multiple inclined positioning support mechanisms are fixed to the base and arranged at intervals along the circumference of the base. The inclined positioning support mechanisms are used to position and support the periphery of the body-in-white of the special vehicle.

[0009] Preferably, the inclined positioning support mechanism includes an inclined positioning support frame, an inclined positioning support plate, and an inclined positioning support pad. The inclined positioning support frame is fixedly connected to the base, the inclined positioning support plate is fixedly connected to the inclined positioning support frame and is inclined, and the inclined positioning support pad is fixedly connected to the surface of the inclined positioning support plate.

[0010] Preferably, the welding positioning fixture further includes multiple positioning pin mechanisms, which are fixed to the base and spaced apart. The positioning pin mechanisms are used to position the body-in-white of the welding special vehicle.

[0011] Preferably, the positioning pin mechanism includes a positioning pin support frame and a positioning pin, the positioning pin having an external thread section, the positioning pin support frame having a threaded hole, and the external thread section passing through the welded special vehicle body-in-white and threadedly connected to the threaded hole.

[0012] Preferably, the welding positioning fixture further includes a plate support mechanism, which is fixed to the base and spaced apart, and is used to support and fix the bottom of the special vehicle body-in-white.

[0013] Preferably, the plate support mechanism includes a plate support frame, a plate support plate, and a plate support pad. The plate support frame is fixedly connected to the base, the plate support plate is fixedly connected to the plate support frame and is horizontally arranged, and the plate support pad is fixedly connected to the surface of the plate support plate.

[0014] Preferably, the welding positioning fixture further includes at least two front support seats, which are fixed to the base and spaced apart. The front support seats are used to support and fix the front of the special vehicle body-in-white.

[0015] Preferably, it further includes a safety fence, which is located on the side of the first welding rail away from the rail-type transfer platform vehicle, and / or the safety fence is located on the side of the second welding rail away from the rail-type transfer platform vehicle.

[0016] Preferably, the system also includes a workstation electrical cabinet, a welding machine, and a gas cylinder. The workstation electrical cabinet and the welding machine are electrically connected to the first welding robot and the second welding robot, and the gas cylinder is connected to the protective gas nozzles of the first welding robot and the second welding robot.

[0017] Compared with the prior art, the present invention, by adopting the above technical solution, has the following technical effects: This invention achieves precise positioning of the body-in-white of special vehicles through welding positioning fixtures. The collaborative operation of a first and second welding robot effectively improves welding flexibility and efficiency, reducing production cycle time by more than 30%, and is suitable for mixed-line production of various special vehicles. The first and second welding robots move collaboratively along the first and second welding rails respectively, achieving comprehensive welding of the body-in-white's perimeter and roof. The rail-type transfer platform allows for rapid changeover of the welding positioning fixtures, adapting to different vehicle models and improving equipment versatility. The welding positioning fixture employs multiple inclined positioning support mechanisms, multiple positioning pin mechanisms, and multiple flat plate support mechanisms to achieve precise three-dimensional positioning of the special vehicle's body-in-white. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of the special vehicle body-in-white welding device provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the welding positioning fixture provided in an embodiment of the present utility model.

[0019] In the diagram: 1. Special vehicle body-in-white; 2. First welding robot; 3. First welding rail; 4. Welding positioning fixture; 41. Inclined positioning support mechanism; 411. Inclined positioning support frame; 412. Inclined positioning support plate; 413. Inclined positioning support pad; 42. Positioning pin mechanism; 421. Positioning pin support frame; 422. Positioning pin; 43. Flat plate support mechanism; 431. Flat plate support frame; 432. Flat plate support plate; 433. Flat plate support pad; 44. Head support seat; 5. Rail-type transfer platform vehicle; 6. Second welding rail; 7. Second welding robot; 8. Safety fence; 9. Workstation electrical cabinet; 10. Welding machine; 11. Gas cylinder; 12. Workstation operating table. Detailed Implementation

[0020] To enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0021] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly set on the other component; when a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to the other component.

[0022] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0024] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes and to aid those skilled in the art in understanding and reading the content disclosed herein. They are not intended to limit the implementation conditions of this application and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effectiveness and purpose of this application, should still fall within the scope of the technical content disclosed herein. Furthermore, the term "and / or" as used in this specification includes any and all combinations of the related listed items.

[0025] like Figure 1 and Figure 2As shown, this utility model provides a special vehicle body-in-white welding device for welding a special vehicle body-in-white 1. It includes a track-type transfer platform 5, a first welding rail 3, a second welding rail 6, a first welding robot 2, and a second welding robot 7. The track-type transfer platform 5 is equipped with a welding positioning fixture 4 for mounting and fixing the special vehicle body-in-white 1, and the track-type transfer platform 5 can move along a preset direction. The first welding rail 3 and the second welding rail 6 are respectively located on both sides of the track-type transfer platform 5, and their length directions are parallel to the preset direction. The first welding robot 2 is slidably connected to the first welding rail 3 and can rotate toward the welding positioning fixture 4 to weld the special vehicle body-in-white 1. The second welding robot 7 is slidably connected to the second welding rail 6 and can rotate toward the welding positioning fixture 4 to weld the special vehicle body-in-white 1. The first welding rail and the second welding rail are arranged parallel to each other on both sides of the welding station, and the spacing meets the requirements for the collaborative operation radius of the two robots.

[0026] In one embodiment, the welding positioning fixture 4 includes a base 40 and a plurality of inclined positioning support mechanisms 41. The plurality of inclined positioning support mechanisms 41 are fixed to the base 40 and are arranged at intervals along the circumference of the base 40. The inclined positioning support mechanisms 41 are used to position and support the periphery of the special vehicle body-in-white 1.

[0027] In one embodiment, the inclined positioning support mechanism 41 includes an inclined positioning support frame 411, an inclined positioning support plate 412, and an inclined positioning support pad 413. The inclined positioning support frame 411 is fixedly connected to the base 40, the inclined positioning support plate 412 is fixedly connected to the inclined positioning support frame 411 and is inclined, and the inclined positioning support pad 413 is fixedly connected to the surface of the inclined positioning support plate 412. Specifically, the inclined positioning support frame 411 is welded to the base 40, the inclined positioning support plate 412 is welded to the inclined positioning support frame 411, and the inclined positioning support pad 413 is made of polyurethane material with a Shore hardness of 70±5. It is adjustablely connected by M8 flange bolts and serves as circumferential support for the special vehicle body-in-white 1 and for shock absorption during loading and unloading operations.

[0028] In one embodiment, the welding positioning fixture 4 further includes multiple positioning pin mechanisms 42, which are fixed to the base 40 and spaced apart. The positioning pin mechanisms 42 are used for positioning the welding of the special vehicle body-in-white 1. The floor holes of the special vehicle body-in-white 1 are inserted into the positioning pin mechanisms 42 to play a positioning and error-prevention role.

[0029] In one embodiment, the positioning pin mechanism 42 includes a positioning pin support frame 421 and a positioning pin 422. The positioning pin 422 has an external thread section, and the positioning pin support frame 421 has a threaded hole. The external thread section passes through the welding special vehicle body-in-white 1 and is threadedly connected to the threaded hole. Specifically, the special vehicle body-in-white 1 achieves precise positioning connection with the welding positioning fixture 4 through thirteen inclined positioning support mechanisms 41 and positioning pin mechanisms 42.

[0030] In one embodiment, the welding positioning fixture 4 further includes a flat plate support mechanism 43, which is fixed to the base 40 and spaced apart. The flat plate support mechanism 43 is used to support and fix the bottom of the special vehicle body-in-white 1.

[0031] In one embodiment, the plate support mechanism 43 includes a plate support frame 431, a plate support plate 432, and a plate support pad 433. The plate support frame 431 is fixedly connected to the base 40, the plate support plate 432 is fixedly connected to the plate support frame 431 and is horizontally arranged, and the plate support pad 433 is fixedly connected to the surface of the plate support plate 432. Specifically, the plate support frame 431 is welded to the base 40, the plate support plate 432 is welded to the plate support frame 431, and the plate support pad 433 is made of polyurethane material with a Shore hardness of 70±5. It is adjustablely connected by M8 flange bolts and serves as the bottom support for the special vehicle body-in-white 1 and for shock absorption during loading and unloading operations.

[0032] In one embodiment, the welding positioning fixture 4 further includes at least two front support seats 44, which are fixed to the base 40 and spaced apart. The front support seats 44 are used to support and fix the front of the special vehicle body 1.

[0033] In one embodiment, a safety fence 8 is also included. The safety fence 8 is located on the side of the first welding rail 3 opposite to the rail-type transfer platform vehicle 5, and the safety fence 8 is located on the side of the second welding rail 6 opposite to the rail-type transfer platform vehicle 5. Specifically, the safety fence 8 is equipped with a grating sensor linked to an emergency stop circuit, which automatically pauses the robot's movement when personnel enter the work area.

[0034] In one embodiment, the system also includes a workstation electrical cabinet 9, a welding machine 10, and a gas cylinder 11. The workstation electrical cabinet 9 and the welding machine 10 are electrically connected to the first welding robot 2 and the second welding robot 7, and the gas cylinder 11 is connected to the protective gas nozzles of the first welding robot 2 and the second welding robot 7. Specifically, the welding machine and the gas cylinder are arranged side by side on both sides of the workstation electrical cabinet, and the workstation operating platform is placed side by side on the far left.

[0035] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0036] A welding mechanism is formed by a first welding rail 3 and a first welding robot 2, and a welding mechanism is formed by a second welding rail 6 and a second welding robot 7. The first welding rail 3, the welding positioning fixture 4, and the second welding rail 6 are arranged side by side, that is, the first welding rail 3 and the second welding rail 6 are distributed on both sides of the welding positioning fixture 4 in a direction perpendicular to its extension direction. The first welding robot 2 is slidably mounted on the first welding rail 3 and can move back and forth along the first welding rail 3. The second welding robot 7 is independently slidably mounted on the second welding rail 6. The two rail systems form a symmetrical operation layout. At the same time, the welding positioning fixture 4 can carry the body-in-white of the special vehicle 1. In this way, as the first welding robot 2 reciprocates along the first welding rail 3 and the second welding robot 7 reciprocates along the second welding rail 6, the special vehicle body-in-white 1 is placed on both sides of the welding robot in a direction perpendicular to its movement direction through a load-bearing and detachable connection. The first welding robot 2 is responsible for the weld seams on the left side and front of the body, while the second welding robot 7 simultaneously processes the weld seams on the right side and rear. Through TCP trajectory planning, 360° interference-free welding is achieved, which facilitates welding operations around the special vehicle body-in-white 1. This enables dual-station welding robots to weld the special vehicle body-in-white, effectively expanding the application scope of the entire welding production line. By simultaneously carrying out welding operations and loading or unloading operations, the operation time of an automated welding process can be effectively shortened, thereby greatly improving the overall efficiency of automated welding operations.

[0037] It should be noted that the body-in-white 1 of special vehicles is usually a regular structure. There are many types of body-in-white 1, but the batch production is relatively small. Therefore, the length of the welding positioning fixture 4 is set to be close to the length of the first welding rail 3 and the second welding rail 6 to ensure stable support of the body-in-white 1. The welding positioning fixture 4 can be detachably connected to the rail-type transfer platform vehicle 5 through clamps or fasteners. To facilitate the movement and unloading of the larger body-in-white 1, such as... Figure 1As shown, a welding positioning fixture 4 is composed of multiple support platforms, which are spaced apart along the extension directions of the first welding ground rail 3 and the second welding ground rail 6. All support platforms are used to support the special vehicle body-in-white 1, thus ensuring stable support of the special vehicle body-in-white 1 by the welding positioning fixture 4. Simultaneously, the track-type transfer platform 5 is equipped with a pneumatic locking device, which locks with the ground reference pin with a repeatability accuracy of ±0.2mm after positioning. The removal of the track-type transfer platform 5 from its work position facilitates the hoisting and unloading of the special vehicle body-in-white 1. Of course, in other embodiments of this utility model, the special vehicle body-in-white 1 can be a regular structure, and the welding positioning fixture 4 can stably support the regular structure, thereby ensuring the stability of the welding robot's welding operation on the special vehicle body-in-white 1. There are two welding work groups in the welding work area. The two welding work groups are set at intervals along the extension direction of the first welding ground rail 3. Safety fences are set on the opposite sides of the two welding work groups. After the special vehicle body 1 is welded, it is moved out of the work position by the rail-type transfer platform vehicle 5, which not only protects the operation, but also does not affect the loading and unloading of the special vehicle body 1.

[0038] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A welding device for the body-in-white of special vehicles, used for welding the body-in-white of special vehicles, characterized in that, include: The rail-mounted transfer platform vehicle is equipped with welding positioning fixtures for installing and fixing the body-in-white of special vehicles, and the rail-mounted transfer platform vehicle can move along a preset direction. The first welding rail and the second welding rail are respectively located on both sides of the track-type transfer platform vehicle, and the length direction of the first welding rail and the second welding rail is parallel to the preset direction. The first welding robot is slidably connected to the first welding ground rail and can rotate toward the welding positioning fixture to weld the body-in-white of the special vehicle. The second welding robot is slidably connected to the second welding ground rail and can rotate toward the welding positioning fixture to weld the body-in-white of the special vehicle.

2. The special vehicle body-in-white welding device according to claim 1, characterized in that, The welding positioning fixture includes a base and multiple inclined positioning support mechanisms. The multiple inclined positioning support mechanisms are fixed to the base and arranged at intervals along the circumference of the base. The inclined positioning support mechanisms are used to position and support the periphery of the body-in-white of the special vehicle.

3. The special vehicle body-in-white welding device according to claim 2, characterized in that, The inclined positioning support mechanism includes an inclined positioning support frame, an inclined positioning support plate, and an inclined positioning support pad. The inclined positioning support frame is fixedly connected to the base, the inclined positioning support plate is fixedly connected to the inclined positioning support frame and is inclined, and the inclined positioning support pad is fixedly connected to the surface of the inclined positioning support plate.

4. The special vehicle body-in-white welding device according to claim 2, characterized in that, The welding positioning fixture also includes multiple positioning pin mechanisms, which are fixed to the base and spaced apart. The positioning pin mechanisms are used to position the body-in-white of the welding special vehicle.

5. The special vehicle body-in-white welding device according to claim 4, characterized in that, The positioning pin mechanism includes a positioning pin support frame and a positioning pin. The positioning pin has an external thread section, and the positioning pin support frame has a threaded hole. The external thread section passes through the welded special vehicle body and is threadedly connected to the threaded hole.

6. The special vehicle body-in-white welding device according to claim 2, characterized in that, The welding positioning fixture also includes a plate support mechanism, which is fixed to the base and spaced apart. The plate support mechanism is used to support and fix the bottom of the special vehicle body-in-white.

7. The special vehicle body-in-white welding device according to claim 6, characterized in that, The flat plate support mechanism includes a flat plate support frame, a flat plate support plate, and a flat plate support pad. The flat plate support frame is fixedly connected to the base, the flat plate support plate is fixedly connected to the flat plate support frame and is horizontally arranged, and the flat plate support pad is fixedly connected to the surface of the flat plate support plate.

8. The special vehicle body-in-white welding device according to claim 2, characterized in that, The welding positioning fixture also includes at least two front support seats, which are fixed to the base and spaced apart. The front support seats are used to support and fix the front of the special vehicle body-in-white.

9. The special vehicle body-in-white welding device according to claim 1, characterized in that, It also includes a safety fence, which is located on the side of the first welded ground rail away from the rail-type transfer platform vehicle, and / or the safety fence is located on the side of the second welded ground rail away from the rail-type transfer platform vehicle.

10. The special vehicle body-in-white welding device according to claim 1, characterized in that, It also includes a workstation electrical cabinet, a welding machine, and a gas cylinder. The workstation electrical cabinet and the welding machine are electrically connected to the first welding robot and the second welding robot, and the gas cylinder is connected to the protective gas nozzles of the first welding robot and the second welding robot.

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