CMT welding clamp for battery box body edge beam

Abstract

The invention relates to a CMT welding clamp for a battery box body edge beam. The CMT welding clamp comprises a rack, a plurality of bases are arranged on the rack, a plurality of adjusting seats are movably arranged on the bases, and first cushion blocks and / or second cushion blocks of the adjusting seats are fixed to the adjusting seats respectively; the clamp further comprises an oil cylinder, the oil cylinder is close to the adjusting base and fixed to the base, and a pressing mechanism is further arranged at the output end of the oil cylinder. By additionally arranging the oil cylinder and the pressing mechanism, clamping force can be improved, the angular deformation rate and flatness can be reduced, the pressure of the oil cylinder is uniform and stable, welding deformation is reduced by 47%-50%, the porosity of a welding seam is reduced by 66%, stable and reliable pressing force is provided through the oil cylinder and the pressing mechanism, and it is guaranteed that a part to be welded does not move in the welding process.

Description

Technical Field

[0001] This invention relates to the field of welding fixtures and equipment, and more particularly to a CMT welding fixture for the side beams of a battery box. Background Technology

[0002] Currently, in the manufacturing process of new energy vehicle battery boxes, side beam welding is a key manufacturing process to ensure the structural strength and sealing of the battery box. However, the traditional welding tooling has the following problems: (i) Traditional welding fixtures are not versatile and cannot meet the welding requirements of battery side beams of various sizes and shapes. Different molds need to be prepared, which increases costs.

[0003] (ii) The clamping force of traditional welding fixtures is insufficient, which makes the parts easy to shift during the welding process and affects the welding quality.

[0004] (iii) The tooling is fixed and cannot be moved, which cannot meet the production needs of multiple workstations. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the purpose of this invention is to provide a CMT welding fixture for battery box side beams to solve one or more problems in the prior art.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A CMT welding fixture for battery box side beams includes a frame with multiple bases on the frame and multiple adjustable seats movably mounted on the bases. A first pad and / or a second pad are fixed on each adjustable seat. The fixture also includes a hydraulic cylinder that is close to the adjustable seat and fixed to the base. A clamping mechanism is provided at the output end of the hydraulic cylinder.

[0007] Furthermore, the clamping mechanism includes a movable block, a support block, a fixed seat, and a pressure head. The fixed seat is fixedly connected to the outside of the hydraulic cylinder. One end of the movable block is connected to the output end of the hydraulic cylinder, and the other end of the movable block is connected to the pressure head. One end of each pair of support blocks is fixedly connected to the fixed seat, and the other end of each pair of support blocks is hinged to the movable block.

[0008] Furthermore, the length of the adjusting seat is 80mm to 85mm, and the spacing between adjacent adjusting seats is adjustable from 0 to 1000mm.

[0009] Furthermore, the base has multiple first mounting holes, and each first mounting hole is arranged in a rectangular array.

[0010] Furthermore, the adjusting seat has multiple second mounting holes and a third mounting hole, wherein the diameter of the second mounting hole is larger than that of the third mounting hole.

[0011] Furthermore, the thickness of the first pad is less than the thickness of the second pad.

[0012] Furthermore, the thickness of the first pad is 10mm to 15mm, and the thickness of the second pad is 20mm to 25mm.

[0013] Furthermore, the first pad has multiple fourth mounting holes, and the second pad has multiple fifth mounting holes, wherein the fourth mounting holes and the fifth mounting holes have the same diameter.

[0014] Furthermore, multiple mounting plates are provided at the bottom of the frame, and each mounting plate is connected to a swivel caster.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows: This invention, by adding a hydraulic cylinder and a clamping mechanism, can not only increase the clamping force, but also reduce the angular deformation rate and flatness. The uniform and stable pressure of the hydraulic cylinder reduces welding deformation by 47% to 50% and the weld porosity by 66%. The hydraulic cylinder and clamping device provide a stable and reliable clamping force, ensuring that the parts to be welded do not shift during the welding process.

[0016] Furthermore, by adding adjusting seats, a first pad, and a second pad, it is possible to adapt to the welding requirements of battery side beams of different sizes and shapes. The spacing between the adjusting seats is adjustable according to the length of the battery side beam, and different numbers can be selected to ensure the flatness of the battery side beam. The first pad and the second pad are composed of different thicknesses, which can be adapted to the adjustment of battery side beams of different heights, effectively meeting the welding requirements.

[0017] Furthermore, swivel casters are added to the bottom of the frame to enable it to move, facilitating welding at different positions and allowing for rapid movement between different workstations, thereby improving production efficiency. Attached Figure Description

[0018] Figure 1 A schematic diagram of a CMT welding fixture for a battery box side beam is shown according to an embodiment of the present invention.

[0019] Figure 2 This diagram illustrates the application of a CMT welding fixture for the side beam of a battery box according to an embodiment of the present invention.

[0020] Figure 3 A partial structural schematic diagram of a CMT welding fixture for a battery box side beam is shown according to an embodiment of the present invention.

[0021] Figure 4 This invention illustrates the structure of the first pad in a CMT welding fixture for a battery box side beam according to an embodiment of the present invention.

[0022] The following are labels in the attached diagram: 1. Frame; 2. Mounting plate; 3. Universal caster; 4. Base; 400. First mounting hole; 5. Hook; 6. Hydraulic cylinder; 601. Movable block; 602. Support block; 603. Fixed seat; 604. Pressure head; 7. Adjusting seat; 700. Second mounting hole; 701. Third mounting hole; 8. First pad; 800. Fourth mounting hole; 9. Second pad; 900. Fifth mounting hole; 10. Hydraulic station; 11. Rear beam of the assembly. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the following detailed description of a CMT welding fixture for a battery box side beam, in conjunction with the accompanying drawings and specific embodiments, is provided. CMT welding specifically refers to cold metal transfer welding. The advantages and features of this invention will become clearer from the following description. It should be noted that the drawings are in a very simplified form and use non-precise proportions, used only to facilitate and clearly illustrate the purpose of the embodiments of this invention. Please refer to the accompanying drawings to make the objectives, features, and advantages of this invention more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only for illustrative purposes and to enable those skilled in the art to understand and read them, and are not intended to limit the implementation conditions of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives achieved by this invention, should still fall within the scope of the technical content disclosed in this invention.

[0024] Please refer to Figure 1 The CMT welding fixture for the battery box side beam in this embodiment includes a frame 1. The frame 1 is formed by connecting multiple profiles. Multiple mounting plates 2 are fixed to the bottom of the frame 1, and each mounting plate 2 is connected to a caster 3, enabling the frame 1 to move from a first workstation to a second workstation for welding operations at different positions. Multiple hooks 5 are also provided on the side of the frame 1 for hanging tools.

[0025] Furthermore, multiple bases 4 are fixed on the frame 1. The length of the base 4 is the same as the length of the frame 1. Multiple first mounting holes 400 are opened on the base 4, and the first mounting holes 400 are arranged in a rectangular array.

[0026] For further details, please refer to... Figures 1 to 4Multiple adjustment seats 7 are movably disposed on the base 4. Specifically, the width of the adjustment seat 7 is the same as the width of the base 4, and the length of the adjustment seat 7 is 80mm to 85mm. Multiple second mounting holes 700 and third mounting holes 701 are respectively opened on the adjustment seat 7. The diameter of the second mounting hole 700 is larger than that of the third mounting hole 701. The adjustment seat 7 can be fixed to the first mounting hole 400 of the base 4 by fasteners and the second mounting holes 700.

[0027] For further information, please refer to the following: Figures 1 to 4 A first pad 8 and / or a second pad 9 are fixed to the top of the base 4. Depending on the welding height of the front and rear beams to be welded, a single first pad 8, a single second pad 9, or a combination of the first pad 8 and the second pad 9 can be used. Specifically, the thickness of the first pad 8 is less than the thickness of the second pad 9; the thickness of the first pad 8 is 10-15 mm, and the thickness of the second pad 9 is 10-15 mm. Multiple fourth mounting holes 800 are formed on the first pad 8, and multiple fifth mounting holes 900 are formed on the second pad 9. The diameters of the fourth mounting holes 800 and the fifth mounting holes 900 are the same.

[0028] Furthermore, in order to ensure the fixation and clamping of the parts to be welded (such as the front beam and the rear beam), the fixture also includes a hydraulic cylinder 6. The hydraulic cylinder 6 is close to the adjusting seat 7 and fixed to the base 4. A clamping mechanism is also provided at the output end of the hydraulic cylinder 6. The hydraulic cylinder 6 is supplied with oil through a hydraulic station fixed to the bottom of the frame 1. The specific clamping mechanism includes a movable block 601, a support block 602, a fixed base 603, and a pressure head 604. The fixed base 603 is fixed to the top outer side of the hydraulic cylinder 6. One end of the movable block 601 is connected to the output end of the hydraulic cylinder 6, and the other end of the movable block 601 is fixedly connected to the pressure head 604. A pair of support blocks 602 are symmetrically arranged around the fixed base 603. One end of each support block 602 is fixedly connected to the fixed base 603, and the other end of each support block 602 is hinged to the middle of the movable block 601 via a pin. This allows the movable block 601 to rotate slightly around the pin when the output end of the hydraulic cylinder 6 is activated, thereby raising and lowering the pressure head 604. When the pressure head 604 rises, it releases the clamping of the workpiece to be welded; conversely, it clamps the workpiece to be welded.

[0029] The specific working process of this invention is as follows: Please refer to Figures 1 to 4Depending on the size of the battery box side beam, such as the rear beam 11 of the assembly, placed on the surface of the base 4, a suitable first pad 8 or second pad 9 is selected. Simultaneously, the spacing between adjacent adjusting seats 7 is adjusted. The spacing adjustment value between adjacent adjusting seats 7 is 0mm to 1000mm, ensuring that the number of adjusting seats 7 can effectively support the rear beam 11 of the assembly. Specifically, in this embodiment, four adjusting seats 7 are preferred, with two adjusting seats 7 close to each other and positioned at the center of the bottom of the rear beam 11 of the assembly, and the remaining two adjusting seats 7 respectively positioned at the left and right ends of the bottom of the rear beam 11 of the assembly. Each adjusting seat 7 has a top opening... The first pad 8 and the second pad 9 are fastened with fasteners. After adjusting the clamping force through the hydraulic station 10, the hydraulic cylinder 6 is started. The output end of the hydraulic cylinder 6 rises and drives one end of the movable block 601 to rise. At the same time, since the movable block 601 is hinged to the fixed seat 603 through the pin, the other end of the movable block 601 falls and drives the pressure head 604 to fall and clamp the rear beam 11 of the assembly, ensuring that it is clamped and does not shift during the welding process. After clamping, welding is performed by the CMT welding mechanism. The welding gun welds according to the preset path. After welding is completed, the output end of the hydraulic cylinder 6 retracts and the pressure head 604 is released. The rear beam 11 of the assembly can then be removed for inspection.

[0030] Furthermore, by employing a hydraulic cylinder, the clamping force of which is approximately 600 kg (compared to 350 kg for a traditional pneumatic cylinder), the clamping force is increased by 75%. The hydraulic cylinder's angular deformation is 0.8° and its flatness is 0.6 mm, while the traditional pneumatic cylinder's angular deformation is 1.5° and its flatness is 1.2 mm. Therefore, it can be seen that the hydraulic cylinder pressure is uniform and stable, reducing welding deformation by 47% to 50% and reducing weld porosity by 66%. This effectively solves the problems of insufficient rigidity, large deformation, and numerous pores in the welding of the battery box side beams.

[0031] 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.

[0032] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A CMT welding fixture for battery box side beams, comprising a frame, characterized in that: Multiple bases are provided on the frame, and multiple adjusting seats are movably provided on the bases. A first pad and / or a second pad are fixed on each adjusting seat respectively. The clamp also includes a hydraulic cylinder, which is close to the adjusting seat and fixed to the base. A clamping mechanism is also provided at the output end of the hydraulic cylinder.

2. The CMT welding fixture for the side beam of a battery box as described in claim 1, characterized in that: The clamping mechanism includes a movable block, a support block, a fixed seat, and a pressure head. The fixed seat is fixed to the outside of the oil cylinder. One end of the movable block is connected to the output end of the oil cylinder, and the other end of the movable block is connected to the pressure head. One end of each pair of support blocks is fixed to the fixed seat, and the other end of each pair of support blocks is hinged to the movable block.

3. The CMT welding fixture for the side beam of a battery box as described in claim 1, characterized in that: The length of the adjusting seat is 80mm to 85mm, and the spacing between adjacent adjusting seats is adjustable from 0mm to 1000mm.

4. The CMT welding fixture for the side beam of a battery box as described in claim 1, characterized in that: The base has multiple first mounting holes, and each first mounting hole is arranged in a rectangular array.

5. A CMT welding fixture for battery box side beams as described in claim 1, characterized in that: The adjusting seat has multiple second mounting holes and a third mounting hole, the diameter of the second mounting hole being larger than that of the third mounting hole.

6. The CMT welding fixture for the side beam of a battery box as described in claim 1, characterized in that: The thickness of the first pad is less than the thickness of the second pad.

7. A CMT welding fixture for battery box side beams as described in claim 6, characterized in that: The thickness of the first pad is 10mm to 15mm, and the thickness of the second pad is 20mm to 25mm.

8. A CMT welding fixture for battery box side beams as described in claim 1, characterized in that: The first pad has multiple fourth mounting holes, and the second pad has multiple fifth mounting holes, wherein the fourth mounting holes and the fifth mounting holes have the same diameter.

9. A CMT welding fixture for battery box side beams as described in claim 1, characterized in that: Multiple mounting plates are installed at the bottom of the frame, and each mounting plate is connected to a swivel caster.

Images