High-efficiency clamp tooling for copper bar laser welding

Abstract

The utility model belongs to welding fixture technical field, concretely is a kind of high -efficient fixture fro copper bar laser welding, including bottom plate, several clamping mechanisms of being located on bottom plate;The clamping mechanism includes clamping base, down-pressing component, the clamping base is equipped with the clamping block of movable up and down, the bottom of clamping block is equipped with a group of strip compacting parts, the down-pressing component can act on clamping block and make it down-pressing;Pre-pressing block is also embedded on the clamping base, the bottom of pre-pressing block is connected with pre-compression spring, pre-compression spring is located inside clamping base, pre-pressing block is higher than the plane of clamping base when pre-compression spring is not compressed, the clamping base is also equipped with the plug-in block that workpiece can be inserted into.The worker only needs to insert copper bar into the plug-in block on clamping base, pre-pressing block is used to pre-press copper bar tightly without falling, then down-pressing component is used to down-press clamping block, strip compacting part on clamping block can effectively prevent silver soldering sheet from warping, improve welding quality and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of welding fixture technology, and specifically relates to a high-efficiency fixture for laser welding of copper busbars. Background Technology

[0002] Due to their excellent conductivity, flexibility, and fatigue resistance, soft copper busbars are widely used in new energy vehicles, energy storage systems, and power equipment. The quality of their connection directly determines the reliability and safety of the overall system. Laser welding, as a high-precision and high-efficiency connection process, effectively solves the core pain points in soft copper busbar welding, such as "easy oxidation, large thermal deformation, and high conductivity requirements at the joints," and is currently one of the mainstream technologies for soft copper busbar connections.

[0003] Special fixtures are required for laser welding of copper busbars. Existing fixtures require silver solder sheets to be placed on the surface of the copper busbars and the copper busbars to be fixed one by one by manual clamps. This operation is inefficient and cannot be adapted to modern high-efficiency production. At the same time, the uneven force after the clamps are pressed down makes the silver solder sheets prone to lifting, which can easily be broken through by laser welding. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a high-efficiency fixture for laser welding of copper busbars, aiming to solve the above technical problems.

[0005] Technical solution: In order to achieve the above objectives, this utility model provides a high-efficiency fixture for laser welding of copper busbars, including a base plate and a plurality of clamping mechanisms disposed on the base plate; The clamping mechanism includes a clamping base and a pressing component. The clamping base is provided with a clamping block that can move up and down. The bottom of the clamping block is provided with a set of strip-shaped pressing parts. The pressing component can act on the clamping block to press it down. The clamping base is also equipped with a pre-compression block, and a pre-compression spring is connected to the bottom of the pre-compression block. The pre-compression spring is located inside the clamping base. When the pre-compression spring is not compressed, the pre-compression block is higher than the plane of the clamping base. The clamping base is also equipped with a plug for inserting a workpiece.

[0006] With the above solution, workers only need to insert the copper busbar into the insert on the clamping base, pre-press the copper busbar with the pre-pressing block to prevent it from falling off, and then use the pressing component to press down the clamping block. The strip pressing part on the clamping block can effectively prevent the silver solder sheet from warping.

[0007] Furthermore, the pressing assembly includes a cylinder and a pressing lever. The piston rod of the cylinder is rotatably connected to one end of the pressing lever, and the other end of the pressing lever is provided with a pressing head, which can act on the clamping block. The above method uses a cylinder to drive a lower lever to press down or raise its lower end, thereby achieving automatic clamping in batches.

[0008] The cylinder is provided with a connecting seat, which is rotatably connected to the middle of the lower lever through a set of connecting rods.

[0009] Furthermore, the pressing head is a screw structure and is mounted on the pressing lever by double nuts.

[0010] With the above solution, the extension length of the pressing head relative to the pressing lever can be adjusted using a double nut structure.

[0011] Furthermore, the insert block is fixed to the clamping base by bolts, and a limiting boss is provided on the upper part of the insert block extending inward. The distance from the limiting boss to the surface of the clamping base is greater than the thickness of the workpiece.

[0012] With the above scheme, after the copper busbar is inserted into the plug, the upper part is limited by the limiting boss, and the copper busbar is pre-pressed with the pre-pressing block.

[0013] Furthermore, the clamping base is provided with a set of screws, the two ends of the clamping block are sleeved on the screws, and a return spring is also sleeved on the screws. The two ends of the return spring contact the bottom of the clamping block and the clamping base, respectively.

[0014] With the above scheme, the clamping block is sleeved on the screw, so the clamping block moves directly in the numerical direction, and the return spring can reset the clamping block and release the copper busbar.

[0015] Furthermore, the base plate is also equipped with a manual valve and a pressure regulating valve, which are connected in series with the cylinder.

[0016] Furthermore, the cylinder is equipped with speed control valves on its air inlet and outlet.

[0017] As can be seen from the above technical solution, this utility model has the following beneficial effects compared with the prior art: 1. This utility model provides a high-efficiency fixture for laser welding of copper busbars. It has a simple structure and reasonable design. The clamping block and the lower pressure head are designed separately. The clamping block can only move in the vertical direction, so the force acting on the copper busbar and the silver solder sheet is more uniform. The bottom of the clamping block is provided with a strip-shaped clamping part that makes linear contact with the silver solder sheet, ensuring that the silver solder sheet is flat and does not warp, thus improving the welding yield.

[0018] 2. This utility model uses a cylinder to drive a downward lever, and inserts and pre-pressing blocks are set on the clamping base to pre-press the copper busbars. After a batch of copper busbars is installed, the cylinder drives the downward lever to clamp the copper busbars for welding, which greatly improves production efficiency. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of a high-efficiency fixture for laser welding of copper busbars according to the present invention; Figure 2 This is a schematic diagram of the clamping mechanism described in this utility model; Figure 3 This is a cross-sectional view of the clamping mechanism described in this utility model.

[0020] In the diagram: 1-base plate, 2-clamping base, 21-insertion block, 211-limiting boss, 3-pressing assembly, 31-cylinder, 311-connecting seat, 32-pressing lever, 33-pressing head, 4-clamping block, 41-strip clamping part, 5-pre-pressure block, 6-pre-pressure spring, 7-screw, 8-reset spring, 9-manual valve, 10-pressure regulating valve, 11-speed regulating valve. Detailed Implementation

[0021] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0022] like Figure 1-3 As shown: A high-efficiency fixture for laser welding of copper busbars includes a base plate 1 and several clamping mechanisms disposed on the base plate 1; The clamping mechanism includes a clamping base 2 and a pressing component 3. The clamping base 2 is provided with a clamping block 4 that can move up and down. The bottom of the clamping block 4 is provided with a set of strip-shaped pressing parts 41. The pressing component 3 can act on the clamping block 4 to press it down. The clamping base 2 is also equipped with a pre-compression block 5. The bottom of the pre-compression block 5 is connected to a pre-compression spring 6. The pre-compression spring 6 is located inside the clamping base 2. When the pre-compression spring 6 is not compressed, the pre-compression block 5 is higher than the plane of the clamping base 2. The clamping base 2 is also equipped with an insertion block 21 for workpiece insertion.

[0023] When in use, insert the copper busbar into the insert block 21 and place the silver solder sheet on the copper busbar. The pre-pressure block 5 is pushed upward under the action of the pre-pressure spring 6 to pre-press the copper busbar to prevent it from falling. After all the copper busbars are installed on the clamping base 2, the pressing component 3 presses down the clamping block 4. The strip clamping part 41 on the clamping block 4 clamps the copper busbar. At the same time, the pre-pressure spring 6 is compressed, and the pre-pressure block 5 moves down to be flush with the surface of the clamping base 2 to avoid damaging the copper busbar. Welding can then begin. After welding is completed, the copper busbar can be removed.

[0024] The pressing component 3 includes a cylinder 31 and a pressing lever 32. The piston rod of the cylinder 31 is rotatably connected to one end of the pressing lever 32. The other end of the pressing lever 32 is provided with a pressing head 33, which can act on the clamping block 4. The cylinder 31 is provided with a connecting seat 311, which is rotatably connected to the middle part of the pressing lever 32 through a set of connecting rods.

[0025] The piston rod of cylinder 31 extends and lifts one end of the pressing lever 32, causing the middle of the pressing lever 32 to rotate, while the other end, along with the pressing head 33, presses down onto the clamping block 4.

[0026] In a further optimized design, the pressing head 33 is a screw structure and is mounted on the pressing lever 32 via double nuts.

[0027] The insertion block 21 is fixed to the clamping base 2 by bolts. A limiting boss 211 extends inward from the upper part of the insertion block 21, and the distance from the limiting boss 211 to the surface of the clamping base 2 is greater than the thickness of the workpiece. The limiting boss 211 on the upper part of the insertion block 21 limits the upper part of the copper busbar and, in conjunction with the pre-pressing block 5, pre-presses the copper busbar. The fact that the distance from the limiting boss 211 to the surface of the clamping base 2 is greater than the thickness of the workpiece allows for the clamping of copper busbars of the same width but different thicknesses. To facilitate the insertion of the copper busbar, the top front end of the pre-pressing block 5 is rounded or chamfered.

[0028] Specifically, the clamping base 2 is provided with a set of screws 7, and the two ends of the clamping block 4 are sleeved on the screws 7. A return spring 8 is also sleeved on the screws 7, and the two ends of the return spring 8 contact the bottom of the clamping block 4 and the clamping base 2, respectively. The clamping block 4 can only move vertically on the screws 7, and the clamping force on the copper busbar is also vertical, further avoiding warping problems caused by uneven force.

[0029] In addition, the base plate 1 is also equipped with a manual valve 9 and a pressure regulating valve 10, which are connected in series with the cylinder 31. The manual valve 9 controls the movement of the cylinder 31, while the pressure regulating valve 10 can adjust the gas pressure to change the downward clamping force.

[0030] Preferably, the cylinder 31 is provided with speed regulating valves 11 on the air inlet and air outlet.

[0031] In use, the copper busbars are first inserted into their respective clamping mechanisms and pre-tightened by the pre-pressure blocks 5, then the silver solder sheets are placed in sequence. The operator starts the cylinder 31 via the manual valve 9. The cylinder 31 drives the pressing head 33 on the pressing lever 32 to press down the clamping block 4, clamping the copper busbars and starting the welding process. After welding is completed, the cylinder 31 is raised by the manual valve 9, the pressing head 33 separates from the clamping block 4, and the clamping block 4 is lifted by the return spring 8, allowing the welded copper busbars to be removed.

[0032] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A high-efficiency fixture for laser welding of copper busbars, characterized in that, Includes a base plate (1) and several clamping mechanisms disposed on the base plate (1); The clamping mechanism includes a clamping base (2) and a pressing component (3). The clamping base (2) is provided with a clamping block (4) that can move up and down. The bottom of the clamping block (4) is provided with a set of strip-shaped pressing parts (41). The pressing component (3) can act on the clamping block (4) to press it down. The clamping base (2) is also provided with a pre-pressure block (5), and a pre-pressure spring (6) is connected to the bottom of the pre-pressure block (5). The pre-pressure spring (6) is located inside the clamping base (2). When the pre-pressure spring (6) is not compressed, the pre-pressure block (5) is higher than the plane of the clamping base (2). The clamping base (2) is also provided with a plug (21) for inserting workpieces.

2. The high-efficiency fixture for laser welding of copper busbars according to claim 1, characterized in that, The pressing assembly (3) includes a cylinder (31) and a pressing lever (32). The piston rod of the cylinder (31) is rotatably connected to one end of the pressing lever (32). The other end of the pressing lever (32) is provided with a pressing head (33). The pressing head (33) can act on the clamping block (4). The cylinder (31) is provided with a connecting seat (311), which is rotatably connected to the middle of the lower lever (32) through a set of connecting rods.

3. The high-efficiency fixture for laser welding of copper busbars according to claim 2, characterized in that, The pressing head (33) is a screw structure and is mounted on the pressing lever (32) by means of double nuts.

4. The high-efficiency fixture for laser welding of copper busbars according to claim 1, characterized in that, The insert (21) is fixed to the clamping base (2) by bolts. The upper part of the insert (21) extends inward and is provided with a limiting boss (211). The distance between the limiting boss (211) and the surface of the clamping base (2) is greater than the thickness of the workpiece.

5. The high-efficiency fixture for laser welding of copper busbars according to claim 1, characterized in that, The clamping base (2) is provided with a set of screws (7), and the two ends of the clamping block (4) are sleeved on the screws (7). The screws (7) are also sleeved with a return spring (8), and the two ends of the return spring (8) are in contact with the bottom of the clamping block (4) and the clamping base (2) respectively.

6. The high-efficiency fixture for laser welding of copper busbars according to claim 1, characterized in that, The base plate (1) is also provided with a manual valve (9) and a pressure regulating valve (10), which are connected in series with the cylinder (31).

7. The high-efficiency fixture for laser welding of copper busbars according to claim 6, characterized in that, Speed ​​control valves (11) are provided on the air inlet and air outlet of the cylinder (31).

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