Pressing mechanism

Abstract

Provided is a novel pressing mechanism for laser welding, comprising: a pressing part that is pressed on a body to be welded and has an opening part through which a laser beam passes; a gas supply channel which is opened towards the pressing part and is used for supplying shielding gas to the pressing part; and a smoke discharge channel which is opened towards the pressing part and is used for discharging smoke generated by the laser welding.

Description

Technical Field

[0001] This utility model relates to a pressing mechanism. Background Technology

[0002] With the development of electronic products, the requirements for battery packs and circuit devices that serve as the power source for these electronic products are constantly increasing. Various studies are being conducted on their safety and other performance characteristics, battery connection structures, and production processes such as production efficiency.

[0003] In battery assembly, cell welding is a crucial process that involves welding metal components such as connecting pieces to the positive and negative terminals of the cell. This welding operation requires a cylinder to drive a pressure block against the battery to be welded, ensuring a stable environment for the welding process.

[0004] Furthermore, laser welding is the preferred welding method due to its advantages of high energy density, fast welding speed, high weld strength, minimal deformation, and ease of automation. However, during laser welding, the workpiece is at a high temperature; without gas shielding, the weld joint is prone to oxidation, leading to poor welding results. Therefore, it is necessary to increase the shielding gas protection area to prevent instantaneous oxidation of the weld joint during welding.

[0005] In existing technologies, the protective gas supply line and the pressure block are often designed separately. That is, when the pressure block is pressed against the connecting piece and battery to be welded, the protective gas line supplies gas to the welding area from one side. However, in this design, the protective gas flow rate is prone to instability, resulting in yellowing and blackening of the weld joints during welding; furthermore, because the black smoke generated during welding cannot be discharged quickly, it easily adheres to the battery; and the black smoke weakens the laser energy, resulting in weaker welding energy and poor welding effect. Utility Model Content

[0006] In view of the above, the inventor of this utility model has conducted in-depth research and proposed a new type of pressing mechanism. The pressing mechanism integrates the gas supply channel and the smoke exhaust channel, which maximizes the protective gas flow and stabilizes the airflow, prevents the instantaneous oxidation of the weld joint, facilitates the discharge of welding black smoke, and prevents the black smoke generated after welding from weakening the laser energy and affecting the welding effect.

[0007] The technical solution of this utility model is as follows.

[0008] This utility model provides a pressing mechanism for laser welding, comprising: a pressing part, pressed against the workpiece to be welded, having an opening for allowing laser to pass through; a gas supply channel, opening toward the pressing part for supplying protective gas to the pressing part; and a smoke exhaust channel, opening toward the pressing part for exhausting smoke generated by the laser welding.

[0009] Furthermore, preferably, in the pressing mechanism, the air supply channel is located on one side of the pressing part, and the smoke exhaust channel is located on the opposite side of the pressing part.

[0010] Furthermore, preferably, in the pressing mechanism, the air supply channel is an inclined pipe built into the pressing mechanism, one end of which is connected to the air supply mechanism, and the other end of which opens obliquely toward the side of the pressing part.

[0011] Furthermore, preferably, in the pressing mechanism, the smoke exhaust channel is an inclined pipe built into the pressing mechanism, with one end opening obliquely toward the other side of the pressing part and the other end opening toward the outside of the pressing mechanism.

[0012] Furthermore, preferably, in the pressing mechanism, the workpiece to be welded is a battery and a connecting piece, and the pressing part is abutted against the connecting piece. Attached Figure Description

[0013] Figure 1 This is a perspective view schematically showing the front structure of the pressing mechanism 100 of this utility model.

[0014] Figure 2 This is a perspective view schematically showing the back structure of the pressing mechanism 100 of this utility model.

[0015] Figure 3 This is a perspective view illustrating the application of the pressing mechanism 100 of this invention in laser welding.

[0016] Figure 4 The image is a front view illustrating the application of the pressing mechanism 100 of this invention in laser welding. Detailed Implementation

[0017] The embodiments of this utility model will now be described using the accompanying drawings. However, various limitations, technically preferred for carrying out this utility model, are added to the embodiments described below. Therefore, the scope of this disclosure is not limited to the following embodiments and the illustrated examples. Furthermore, the sizes, shapes, and proportions in the illustrated examples are merely illustrative and do not represent specific sizes, shapes, and proportions. In addition, common components in the embodiments are labeled with the same symbols in the drawings, and repeated descriptions are omitted.

[0018] Figure 1 This is a perspective view schematically showing the front structure of the pressing mechanism 100 of this utility model. Figure 2 This is a perspective view schematically showing the back structure of the pressing mechanism 100 of this utility model. (See attached image.) Figure 1As shown, the pressing mechanism 100 has multiple functional parts, including a pressing part 110, an air supply channel 120, and a smoke exhaust channel 130. The overall structure of the pressing mechanism 100 can be assembled from multiple component panels, or it can be integrally molded by molding and can be slotted and engraved in various ways.

[0019] The pressing mechanism 100 is used for laser welding of batteries and connecting pieces. For example, in automated operations, the pressing mechanism 100, which is mounted on a conveying mechanism, is driven by a cylinder to move toward the battery to be welded. The pressing part 110 of the pressing mechanism 100 is made to abut against the area to be welded by a fastening mechanism such as a claw or an elastic mechanism, so as to ensure that the battery and connecting piece in the area to be welded can be in close contact.

[0020] like Figure 2 As shown, the pressing part 110 protrudes from the back of the housing body of the pressing mechanism 100, and has a flat portion for abutting against the connecting piece and the battery. An opening is formed in this flat portion for the laser beam of the laser welding gun to pass through. The pressing part 110 is integrally formed with the housing body of the pressing mechanism 100, for example. The size of the flat portion of the pressing part 110 is, for example, a size suitable for abutting against the welding area (e.g., the area where the connecting piece to be welded is placed at the electrode end of the battery), so as to apply sufficient clamping force to the battery and the connecting piece while avoiding deformation.

[0021] like Figure 1 As shown, above the pressing part 110 in the drawing direction, the pressing mechanism 100 has a hollow square opening area. The laser beam from the laser welding gun passes through the hollow square opening and the opening in the pressing part 110 in sequence and is directed towards the area of ​​the workpiece to be welded.

[0022] like Figures 1-2 As shown, the gas supply channel 120 is an inclined pipe built into the pressing mechanism 100, with one end facing the external opening of the pressing mechanism 100 and the other end facing the pressing part 110. The gas supply channel 120 is a conduit for supplying protective gas to the welding area abutted by the pressing part 110, and its end facing the external opening of the pressing mechanism 100 is connected, for example, to a gas supply mechanism (not shown). Considering factors such as cost, the protective gas supplied by the gas supply mechanism via the gas supply channel 120 is preferably nitrogen, but other inert gases may also be used, as long as they can prevent instantaneous oxidation of the weld joint.

[0023] The end of the gas supply channel 120 that opens toward the pressing part 110 is close to the pressing part 110. By obliquely arranging the gas supply channel 120, the end of which opens obliquely toward the pressing part 110, gas can be accurately supplied to the welding area, thereby ensuring a stable flow of protective gas.

[0024] The smoke exhaust duct 130 is an inclined pipe built into the pressing mechanism 100, located on the opposite side of the pressing part 110 from the side where the air supply duct 120 is located. In other words, the air supply duct 120 and the smoke exhaust duct 130 are respectively located on both sides of the pressing part 110 with the pressing part 110 as the center of symmetry. One end of the smoke exhaust duct 130 opens obliquely toward the opposite side of the pressing part 110 from the side where the air supply duct 120 is located, and the other end of the smoke exhaust duct 130 opens toward the outside of the pressing mechanism 100.

[0025] The fume extraction channel 130 is used to remove the black smoke generated during welding. The black smoke includes, for example, dust, slag, and metal vapor generated during laser welding. If the black smoke cannot be discharged quickly or directly above the pressing part 110, it will obstruct the irradiation path of the laser beam, resulting in weakened laser energy and poor welding effect.

[0026] Through such Figures 1-2 As shown, the gas supply channel 120 and the smoke exhaust channel 130 are respectively located on both sides of the pressing part 110, so that the protective gas can flow smoothly through the welding area near the pressing part 110, and the black smoke is quickly discharged through the smoke exhaust channel 130 under the pressure of the protective gas, thereby purifying the welding environment near the pressing part 110. Furthermore, since the gas supply channel 120 and the smoke exhaust channel 130 are inclined pipes located on both sides of the pressing part 110, it is not necessary to install a separate air extraction mechanism or the like at the end of the smoke exhaust channel 130 facing the external opening of the pressing mechanism 100. It is sufficient to discharge the black smoke naturally through an appropriate pipeline in a way that does not cause pollution. However, it is also possible to connect an air extraction mechanism to the end of the smoke exhaust channel 130 facing the external opening of the pressing mechanism 100.

[0027] The following is for reference Figures 3-4 This describes an embodiment of using the pressing mechanism 100 of this utility model in laser welding. Figure 3 This is a perspective view illustrating the application of the pressing mechanism 100 of this invention in laser welding. Figure 4 The image is a front view illustrating the application of the pressing mechanism 100 of this invention in laser welding.

[0028] like Figures 3-4As shown, firstly, the pressing part 110 of the pressing mechanism 100 is pressed against the battery 200, which is the workpiece to be welded, and the connecting piece 300 located on the electrode terminals of the battery 200. For example, after the battery 200 with the connecting piece 300 placed on it is fixed by a fixture, the pressing part 110 of the pressing mechanism 100 is moved above the connecting piece 300 by a conveying mechanism, and the pressing part 110 is firmly pressed against the battery 200 and the connecting piece 300 by the gripper of the robotic arm. Then, after a protective gas is stably supplied from the gas supply mechanism to the vicinity of the pressing part 110 via the gas supply channel 120, a laser beam is emitted from a laser welding gun (not shown) through the opening in the pressing part 110 to perform welding. Thus, the laser welding operation is performed under the protection of the protective gas, avoiding the yellowing and blackening of the weld joint during welding caused by instantaneous oxidation. Furthermore, the black smoke generated during welding is safely and quickly discharged through the exhaust channel 130 under the thrust of the protective gas supplied from the gas supply channel 120, thereby avoiding the problem of laser energy being weakened due to black smoke obstructing the irradiation path of the laser beam.

[0029] As described above, by using the pressing mechanism 100 of this utility model for laser welding between the battery 200 and the connecting piece 300, since the gas supply channel 120 and the smoke exhaust channel 130 are integrally formed in the pressing mechanism 100, there is no need to set up a separate protective gas supply device, thus realizing the miniaturization and simplification of the device, and making the flow rate of the protective gas stable, and the black smoke generated by welding is quickly discharged.

[0030] This utility model can be modified in various ways without departing from its spirit and essence. These embodiments and variations are all included within the scope or spirit of the utility model, and simultaneously within the scope of the claims and their equivalents.

Claims

1. A pressing mechanism for laser welding, characterized in that, have: The pressing part, which is pressed against the workpiece to be welded, has an opening for the laser to pass through; An air supply channel opens toward the pressing part for supplying protective gas to the pressing part; as well as The smoke exhaust channel opens toward the pressing part to allow the smoke generated by the laser welding to be discharged.

2. The pressing mechanism as described in claim 1, characterized in that, The gas supply channel is located on one side of the pressing part, and the smoke exhaust channel is located on the opposite side of the pressing part.

3. The pressing mechanism as described in claim 2, characterized in that, The air supply channel is an inclined pipe built into the pressing mechanism, one end of which is connected to the air supply mechanism, and the other end of which opens obliquely toward the side of the pressing part.

4. The pressing mechanism as described in claim 3, characterized in that, The smoke exhaust channel is an inclined pipe built into the pressing mechanism, with one end opening obliquely toward the other side of the pressing part and the other end opening toward the outside of the pressing mechanism.

5. The pressing mechanism as described in any one of claims 1 to 4, characterized in that, The components to be welded are the battery and the connecting piece. The pressing part is abutted against the connecting piece.

Images