A cooling device for automobile welding

Abstract

The utility model relates to the field of automobile welding discloses a cooling device for automobile welding, including laser welding torch, welding torch fixed frame, cooling device and curved surface lamination device, after inserting laser welding torch in welding torch fixed frame, fastening, welding torch fixed frame both sides are connected with two curved surface lamination devices respectively, and curved surface lamination device and cooling device are connected through connecting rod, and laser welding torch welds when moving, drives cooling device to move on the curved surface of the workpiece to be welded and cools the weld. The curved surface lamination device and cooling device that the utility model adopts can adhere to the curved surface of the workpiece to be welded when welding, cool the welding position through the mode of heat conduction, the cooling speed is far greater than the air cooling mode, and because the heat conduction caterpillar band is located on both sides of the welding bath can reduce the influence of welding temperature on the heat affected zone, and the cooling device can gradually move along with the change of welding position when welding, solve the problem of fixed cooling area, improve welding efficiency and quality.

Description

Technical Field

[0001] This invention patent belongs to the field of automotive welding, and specifically relates to a cooling device for automotive welding. Background Technology

[0002] To achieve a balance between lightweight and high strength, current automotive bodies extensively utilize new materials such as aluminum alloys and high-strength steel. However, when welding body structural components made of these materials, localized high temperatures are easily generated due to their high thermal conductivity and large coefficient of thermal expansion.

[0003] Air cooling technology for welding relies primarily on airflow to remove heat. However, air has a low specific heat capacity and relatively weak thermal conductivity, making it ineffective at dissipating heat from the welding area in a timely manner for high-heat-input welding processes such as laser welding and electron beam welding. Contact cooling devices, such as metal cooling blocks and water-cooled copper blocks, suffer from the problem of fixed cooling zones. When welding complex body panels or multi-curved structural components, the cooling device struggles to maintain proper contact with the welding area, leading to uneven cooling, deformation, cracks, and other defects in the weld joints, ultimately affecting the assembly accuracy and overall rigidity of the vehicle body. Utility Model Content

[0004] The purpose of this invention is to design a contact cooling device that can fit into complex-shaped car bodies and multi-curved structural components, and can move as the laser welding area changes.

[0005] Based on the above concept, the technical solution adopted by this utility model is as follows:

[0006] A cooling device for automotive welding includes a welding torch fixing frame, a cooling device, and a curved surface bonding device. A laser welding torch is inserted into the welding torch fixing frame and then secured. The welding torch fixing frame is connected to two curved surface bonding devices on both sides, and the curved surface bonding devices and the cooling devices are connected by hinges. The movement of the laser welding torch drives the cooling device to move on the curved surface of the workpiece to be welded and cools the weld.

[0007] Preferably, the welding torch fixing frame includes two semi-circular, square, or other irregularly shaped fastening steel frames, and the fastening steel frames are provided with extension brackets on the sides.

[0008] Optionally, the connection method between the two parts of the welding torch fixing frame includes bolts, clamps, and tenon joints.

[0009] Optionally, the connection method of the extension bracket and the curved surface fitting device includes bolts, clamps, and tenon joints.

[0010] Preferably, the cooling device includes a plurality of heat-conducting wheels, a heat-conducting track, and a drive shaft; the heat-conducting wheels are disposed at both ends of the heat-conducting track, and one end of the heat-conducting track includes two or more heat-conducting wheels; the heat-conducting wheels are hollow, with bearings inside and protrusions on their surfaces.

[0011] Optionally, the protrusions on the surface of the heat-conducting wheel may include triangular, solid, and other regular shapes.

[0012] Preferably, the heat-conducting wheel has a sealing plate on its outer side, and the sealing plate has a liquid inlet hole and a liquid outlet hole. The two sealing plates are arranged on the side of the heat-conducting wheel for sealing.

[0013] Preferably, the inner ring of the heat-conducting track is provided with a groove, the shape and size of which are consistent with the protrusions on the heat-conducting wheel.

[0014] Preferably, the thermally conductive track material can be selected from one of polymer-based thermally conductive composite materials, carbon-based flexible thermally conductive materials, and metal flexible thermally conductive materials; the thermally conductive wheel material can be selected from one of copper, aluminum, and silver.

[0015] Polymer-based thermally conductive composite materials can be selected from graphite composite materials, copper powder composite materials, and silicon carbide composite materials;

[0016] Carbon-based flexible thermal conductive materials can include graphene thermal conductive films, carbon nanotubes, and carbon fibers;

[0017] Flexible thermal conductive materials for metals can be selected from metal foils, metal fibers, and metal particle rubber composites;

[0018] Preferably, the curved surface bonding device includes a main connecting rod, a secondary connecting rod, a side connecting rod, a tensioning wheel assembly, and a spring; the tensioning wheel assembly includes two wheels and a straight shaft, with the straight shaft passing through the two wheels to form a whole; the two tensioning wheel assemblies are connected by a secondary connecting rod, and a spring is provided between the two secondary connecting rods; the two ends of the main connecting rod are connected to the two secondary connecting rods, and the main connecting rod is connected to the drive shaft on the cooling device through the side connecting rod.

[0019] Optionally, the curved surface bonding device includes two or more sets of auxiliary connecting rods.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model designs a cooling device for automotive welding, which uses a curved surface bonding device and a cooling device. During welding, it can bond to the curved surface of the workpiece to be welded and cool the welding part through heat conduction. The cooling speed is much greater than that of air cooling. Furthermore, since the heat-conducting track is located on both sides of the weld pool, it can reduce the impact of welding temperature on the heat-affected zone.

[0022] 2. The cooling device for automotive welding designed in this utility model can gradually move with the welding position during welding, solving the problem of fixed cooling area and improving welding efficiency and quality. Attached Figure Description

[0023] Fig. 1 This is the overall assembly drawing of the automotive welding cooling device of this utility model;

[0024] Fig. 2 This is a schematic diagram of the structure of the welding gun fixing frame of this utility model;

[0025] Fig. 3 This is a schematic diagram of the cooling device of this utility model;

[0026] Fig. 4 This is a schematic diagram of the structure of the heat-conducting track of this utility model;

[0027] Fig. 5 This is a schematic diagram of the structure of the heat-conducting wheel of this utility model;

[0028] Fig. 6 This is a cross-sectional view of the sealing plate of this utility model;

[0029] Fig. 7 This is a schematic diagram of the curved surface bonding device of this utility model;

[0030] In the diagram: 1. Laser welding torch; 2. Welding torch fixing frame; 3. Cooling device; 4. Curved surface bonding device; 21. Fastening steel frame; 22. Bolt hole; 23. Extension bracket; 31. Heat-conducting wheel; 311. Protrusion; 312. Bearing; 313. Sealing plate; 314. Liquid inlet; 315. Liquid outlet; 32. Heat-conducting track; 321. Groove; 33. Drive shaft; 41. Main connecting rod; 42. Secondary connecting rod; 43. Side connecting rod; 44. Tensioning wheel assembly; 441. Wheel; 442. Straight shaft; and 45. Spring. Detailed Implementation

[0031] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0032] like Figs. 1-7 As shown, this utility model includes a welding torch fixing frame 2, a cooling device 3, and a curved surface bonding device 4. The laser welding torch 1 is inserted into the welding torch fixing frame 2 and then secured. The two sides of the welding torch fixing frame 2 are respectively connected to two curved surface bonding devices 4. The curved surface bonding devices 4 and the cooling device 3 are connected by a connecting rod. When the laser welding torch 1 is welding, it moves, which drives the cooling device 3 to move on the curved surface of the workpiece to be welded and cool the weld.

[0033] In this embodiment, the welding gun fixing frame 2 includes two semi-circular fastening steel frames 21 with the same diameter as the laser welding gun 1. The fastening steel frames 21 have bolt holes 22 at both ends, which are locked after the welding gun is inserted. The fastening steel frames 21 also have extension brackets 23 on their sides. The extension brackets 23 are connected to the curved surface fitting device 4, and the movement of the welding gun can realize the movement of the entire device.

[0034] In this embodiment, the curved surface bonding device 4 includes a main connecting rod 41, a secondary connecting rod 42, a side connecting rod 43, a tensioning wheel assembly 44, and a spring 45. The tensioning wheel assembly 44 includes two wheels 441 and a straight shaft 442, with the straight shaft 442 connecting the two wheels 441 into a whole. The two tensioning wheel assemblies 44 are connected by the secondary connecting rod 42, and a spring 44 is provided between the two secondary connecting rods 42. The spring 44 can control the opening angle of the two tensioning wheel assemblies 44. The two ends of the main connecting rod 41 are connected to the two secondary connecting rods 42, and the tensioning wheel assembly 44 can rotate around the hinge of the secondary connecting rod 42. The main connecting rod 41 is connected to the transmission shaft 33 on the cooling device 3 through the side connecting rod 43. On the concave and convex curved surface, the tensioning wheel assembly 44 in the curved surface bonding device 4 will press and bond to the curved surface.

[0035] In this embodiment, the cooling device 3 includes several heat-conducting wheels 31, heat-conducting tracks 32, and a drive shaft 33. The surface of the heat-conducting wheels 31 is provided with protrusions 311, and the inner ring of the heat-conducting tracks 32 is provided with grooves 321. The size of the grooves 321 is the same as that of the protrusions 311 on the heat-conducting wheels 31. The heat-conducting wheels 31 are provided with bearings 312 inside and sealing plates 313 on the outside. The sealing plates 313 are provided with liquid inlet holes 314 and liquid outlet holes 315. After the coolant is introduced, it can absorb the heat generated by welding.

[0036] Detailed implementation methods and principles:

[0037] like Figs. 1-2 As shown, a cooling device for automotive welding is provided. The device includes a laser welding torch 1, a welding torch fixing frame 2, a cooling device 3, and a curved surface bonding device 4. The laser welding torch 1 is inserted into the welding torch fixing frame 2 for fixing. During welding, the laser welding torch 1 drives the cooling device to fit together with the surface of the workpiece through the welding torch fixing frame 2. The laser welding torch 1 moves on the surface of the workpiece, which drives the heat-conducting track 32 to move on the surface of the workpiece.

[0038] like Figs. 3-7 As shown, the heat generated by welding is conducted to the heat-conducting wheel 31 through the heat-conducting track 32. The heat-conducting wheel 31 has a hollow sealed structure and is circulated with low-temperature coolant to quickly remove the heat generated by welding. The tensioning wheel group 44 in the curved surface bonding device 4 will adhere to the surface of the workpiece under the pressure of the laser welding gun 1. When adapting to curved surfaces with different curvatures, it is adjusted by the tensioning wheel group 44 and the spring 45, which is suitable for various curved surface welding environments.

[0039] As is known from common technical knowledge, this utility model can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this utility model or its equivalents are included in this utility model.

Claims

1. A cooling device for automotive welding, characterized in that, It includes a welding torch fixing frame (2), a cooling device (3), and a curved surface bonding device (4); the laser welding torch (1) is inserted into the welding torch fixing frame (2) and then tightened. The two sides of the welding torch fixing frame (2) are respectively connected to two curved surface bonding devices (4). The curved surface bonding device (4) and the cooling device (3) are connected by a connecting rod. When the laser welding torch (1) is welding, it moves, which drives the cooling device (3) to move on the curved surface of the workpiece to be welded and cool the weld.

2. The cooling device for automotive welding according to claim 1, characterized in that, The welding gun fixing frame (2) includes two semi-circular fastening steel frames (21) with the same diameter as the laser welding gun (1). The fastening steel frames (21) have bolt holes (22) at both ends for installing locking bolts, and extension brackets (23) are provided on the side. The extension brackets (23) are connected to the curved surface fitting device (4).

3. A cooling device for automotive welding according to claim 1, characterized in that, The cooling device (3) includes a heat-conducting track (32) and several heat-conducting wheels (31); the surface of the heat-conducting wheel (31) is provided with a protrusion (311), the inside is provided with a bearing (312), and the outside is provided with a sealing plate (313). The sealing plate (313) has a liquid inlet hole (314) and a liquid outlet hole (315); the heat-conducting wheel (31) is located at both ends inside the heat-conducting track (32), and two sealing plates (313) are located on the side of the heat-conducting wheel (31) for sealing.

4. A cooling device for automotive welding according to claim 3, characterized in that, The heat-conducting track (32) is provided with two or more heat-conducting wheels (31) at each end, and the heat-conducting wheels (31) at the same end are connected in series by a drive shaft (33); the inner ring of the heat-conducting track (32) is provided with a groove (321), and the size of the groove (321) is consistent with the protrusion (311) on the heat-conducting wheel (31).

5. A cooling device for automotive welding according to claim 3, characterized in that, The material of the heat-conducting track (32) is selected from any one of polymer-based heat-conducting composite materials, carbon-based flexible heat-conducting materials, and metal flexible heat-conducting materials; the material of the heat-conducting wheel (31) is selected from any one of copper, aluminum, and silver.

6. A cooling device for automotive welding according to claim 4, characterized in that, The curved surface bonding device (4) includes a main connecting rod (41), a secondary connecting rod (42), a side connecting rod (43), a tensioning wheel assembly (44), and a spring (45). The tensioning wheel assembly (44) includes two wheels (441) and a straight shaft (442). The straight shaft (442) passes through the two wheels (441) to form a whole. The two tensioning wheel assemblies (44) are connected to each other through the secondary connecting rod (42). A spring (45) is also provided between the two secondary connecting rods (42). The upper ends of the two secondary connecting rods (42) are hinged together and installed on the main connecting rod (41). The main connecting rod (41) is connected to the transmission shaft (33) on the cooling device (3) through the side connecting rod (43).

7. A cooling device for automotive welding according to claim 6, characterized in that, In the curved surface bonding device (4), two secondary connecting rods (42) constitute a bonding assembly, and there are at least two bonding assemblies.

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