Laser welding single pressure foot tooling

Abstract

The utility model provides a kind of laser welding single presser foot tool, belong to laser welding technical field, including mounting frame body, press cylinder, adapter frame body and presser foot assembly. Mounting frame body is used to install on galvanometer;Press cylinder is longitudinally fixed on mounting frame body;Adapter frame body is set in the driving end of press cylinder lower part;Presser foot assembly includes assembly body and presser foot body, assembly body is set in the lower end of adapter frame body, and assembly body is equipped with sliding cavity, presser foot body is slidably arranged in sliding cavity, and the upper end of presser foot body is provided with elastic member, and elastic member exerts downward elastic force to presser foot body, to make presser foot body lower end extend the lower end surface of assembly body. The utility model provides a kind of laser welding single presser foot tool, can keep stable gap and close fit between battery connecting piece and battery pole always when welding, promote laser energy even effect on welding position, effectively reduce the phenomenon of false welding, leakage welding, greatly improve the reliability and stability of battery connection.

Description

Technical Field

[0001] This utility model belongs to the field of laser welding technology, and more specifically, it relates to a laser welding single presser foot fixture. Background Technology

[0002] In the field of lithium battery technology, laser welding, as a non-contact welding method, is widely used in the battery module production process. Specifically, a high-intensity laser beam is transmitted through optical fiber and focused into a tiny spot by a galvanometer, thereby welding the battery connector (battery connector piece) to the battery terminal.

[0003] Because laser welding requires extremely high assembly precision, the gap between the battery connector and the battery terminal must be controlled within 0.1mm. Once the gap exceeds the predetermined range, the welding quality will be seriously affected, and problems such as incomplete welding and missing welding may occur, which will affect the performance and safety of the battery module. Utility Model Content

[0004] The purpose of this invention is to provide a laser welding single presser foot fixture to ensure the gap between the battery connector and the battery terminal, and to avoid problems such as incomplete welding or missing welding.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: to provide a laser welding single pressure foot fixture, comprising:

[0006] Mounting frame, used for mounting on galvanometer;

[0007] A downward pressing cylinder, which is longitudinally fixed on the mounting frame;

[0008] A transfer frame is disposed at the drive end of the lower part of the pressing cylinder;

[0009] The presser foot assembly includes an assembly body and a presser foot body. The assembly body is disposed at the lower end of the adapter frame. The assembly body has a sliding cavity. The presser foot body is slidably disposed in the sliding cavity. An elastic element is provided at the upper end of the presser foot body. The elastic element applies a downward elastic force to the presser foot body so that the lower end of the presser foot body extends out of the lower end face of the assembly body and presses the battery connecting piece tightly onto the terminal post.

[0010] In one possible implementation, the mounting frame includes:

[0011] A mounting plate is used for mounting on the galvanometer;

[0012] The mounting bracket includes a first plate and a second plate. The upper end of the first plate is connected to the back of the mounting back plate, and the second plate is vertically connected to one side of the first plate. The pressing cylinder is fixed to the second plate.

[0013] In one possible implementation, the upper end of the first plate has a plurality of longitudinally arranged strip holes, and the first plate is connected to the back of the mounting back plate by means of the strip holes.

[0014] In one possible implementation, the back of the mounting backplate is provided with two first positioning blocks, which are respectively engaged on the left and right sides of the first plate to restrict the rotation of the first plate.

[0015] In one possible implementation, a cylinder back plate is provided on the lower side of the second plate, and the upper cylinder body of the pressing cylinder is fixed to the cylinder back plate. Two second positioning blocks are provided on the cylinder back plate, and the two second positioning blocks are respectively locked on the left and right sides of the pressing cylinder to restrict the rotation of the pressing cylinder.

[0016] In one possible implementation, the adapter frame includes:

[0017] An adapter plate is horizontally mounted on the drive end of the lower part of the pressure cylinder;

[0018] Multiple connecting posts are circumferentially and vertically connected to the lower end plate of the adapter plate, and the assembly is connected to the lower end of the multiple connecting posts.

[0019] In one possible implementation, the sliding cavity includes a limiting hole and a sliding hole that are connected sequentially from top to bottom. The inner diameter of the limiting hole is larger than the inner diameter of the sliding hole. A limiting part is provided at the upper end of the pressure foot body. The limiting part is slidably disposed in the limiting hole. The pressure foot body is slidably disposed in the sliding hole. The elastic element is disposed in the limiting hole and located at the upper end of the limiting part.

[0020] In one possible implementation, the assembly includes:

[0021] The first pressure plate, wherein the limiting hole and the sliding hole are formed from top to bottom in the middle of the first pressure plate;

[0022] The second pressure plate is disposed on the upper end surface of the first pressure plate;

[0023] The third pressure plate is disposed on the upper end surface of the second pressure plate;

[0024] The second pressure plate and the third pressure plate are coaxially provided with a connecting hole that communicates with the limiting hole.

[0025] In one possible implementation, the elastic element is a plurality of springs arranged circumferentially, the plurality of springs being circumferentially disposed within the limiting hole and all pressing against the upper end face of the pressure plate body.

[0026] In one possible implementation, a dust removal hole communicating with the limiting hole is provided on one side of the first pressure plate.

[0027] The beneficial effects of the laser welding single-pressor tooling provided by this utility model are as follows: Compared with the prior art, the combination of the mounting frame and the galvanometer realizes the installation of the tooling and the laser welding system. The pressing cylinder drives the adapter frame and the pressor assembly to press down, and the pressor assembly presses the battery connecting piece and the battery terminal tightly, avoiding relative displacement between the two during the welding process and ensuring that the gap between them is in an ideal state. The pressor body in the pressor assembly is connected to the assembly through an elastic element, so that the pressor body can adaptively press the battery connecting piece onto the surface of the battery terminal by the elastic force applied by the elastic element. Even if there are uneven surfaces or dimensional deviations between the two, they can be tightly pressed together with appropriate pressure, ensuring uniform gap. This prevents deformation caused by excessive pressure and avoids loose connection caused by insufficient pressure. During welding, the tooling ensures that the battery connector and the battery terminal maintain a stable gap and close fit, allowing the laser energy to be applied evenly to the welding area. This guarantees the consistency of the weld penetration and width, significantly improves welding quality, effectively reduces incomplete welds and missed welds, and greatly enhances the reliability and stability of the battery connection, providing a solid guarantee for the overall performance and safety of the battery product. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 A perspective view of a laser welding single presser foot fixture provided for this utility model;

[0030] Figure 2 A perspective view of the presser foot assembly provided by this utility model;

[0031] Figure 3 This is a cross-sectional view of the presser foot assembly provided by this utility model.

[0032] In the diagram: 1. Mounting back plate; 2. First plate; 3. Second plate; 4. Strip hole; 5. First positioning block; 6. Cylinder back plate; 7. Second positioning block; 8. Pressing cylinder; 9. Adapter plate; 10. Connecting column; 11. Limiting hole; 12. Sliding hole; 13. Limiting part; 14. Pressing body; 15. First pressure plate; 16. Second pressure plate; 17. Third pressure plate; 18. Connecting hole; 19. Spring; 20. Dust removal hole. Detailed Implementation

[0033] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0034] Unless otherwise explicitly specified, the use of terms such as "first," "second," or "third" is intended to distinguish different objects, not to describe a specific order.

[0035] Unless otherwise expressly defined, the use of directional terms such as “center,” “lateral,” “longitudinal,” “horizontal,” “vertical,” “top,” “bottom,” “inner,” “outer,” “upper,” “lower,” “front,” “back,” “left,” “right,” “clockwise,” “counterclockwise,” “high,” and “low” to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the present invention and simplifying the description. It is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific protection scope of the present invention.

[0036] Please see Figures 1 to 3 This invention provides a laser welding single presser foot fixture. The laser welding single presser foot fixture includes a mounting frame, a pressing cylinder 8, a transfer frame, and a presser foot assembly. The mounting frame is used to mount on a galvanometer; the pressing cylinder 8 is longitudinally fixed on the mounting frame; the transfer frame is located at the driving end of the lower part of the pressing cylinder 8; the presser foot assembly includes an assembly body and a presser foot body 14. The assembly body is located at the lower end of the transfer frame and has a sliding cavity. The presser foot body 14 is slidably disposed within the sliding cavity. An elastic element is provided at the upper end of the presser foot body 14, and the elastic element applies a downward elastic force to the presser foot body 14, causing the lower end of the presser foot body 14 to extend beyond the lower end surface of the assembly body.

[0037] This utility model provides a laser welding single-pressor tooling. Compared with the prior art, the combination of the mounting frame and the galvanometer enables the installation of the tooling and the laser welding system. The pressing cylinder 8 drives the adapter frame and the pressor assembly to press down. The pressor assembly presses the battery connecting piece and the battery terminal tightly, preventing relative displacement between them during welding and ensuring that the gap between them is in an ideal state. The pressor body 14 in the pressor assembly is connected to the assembly through an elastic element, so that the pressor body 14 can adaptively press the battery connecting piece onto the surface of the battery terminal by the elastic force applied by the elastic element. Even if there are uneven surfaces or dimensional deviations, they can be pressed tightly with appropriate pressure to ensure uniform gap. This prevents deformation caused by excessive pressure and avoids loose connection caused by insufficient pressure. During welding, the tooling ensures that the battery connector and the battery terminal maintain a stable gap and close fit, allowing the laser energy to be applied evenly to the welding area. This guarantees the consistency of the weld penetration and width, significantly improves welding quality, effectively reduces incomplete welds and missed welds, and greatly enhances the reliability and stability of the battery connection, providing a solid guarantee for the overall performance and safety of the battery product.

[0038] Furthermore, in existing technologies, laser welding machines use modular tooling, with each tooling unit capable of producing only one type of battery module. This modular tooling suffers from long design and manufacturing cycles, high costs, and slow changeover times. Therefore, current equipment not only cannot trial-produce new module models, slowing down the company's new product development, but also affects the production of small-batch orders. The manufacturing cost of modular tooling significantly increases production costs and reduces the company's economic efficiency. This new tooling can replace the existing modular tooling, supporting the production of multiple battery module models, greatly shortening the tooling design and manufacturing cycle, and reducing costs. Changeover is also faster and more convenient, quickly adapting to the production needs of different product models. Using this tooling, the company can smoothly trial-produce new module models, accelerate new product development, and ensure timely production of small-batch orders. Simultaneously, the reduced tooling manufacturing cost effectively controls production costs, improves the company's economic efficiency, gives the company a greater competitive advantage in the market, and contributes to the company's continued and stable development.

[0039] Please see Figure 1 The mounting backplate 1 is connected to the galvanometer, achieving a stable connection between the tooling and the galvanometer. This ensures that the tooling follows the movement trajectory of the galvanometer during welding, keeping the pressure foot assembly aligned with the welding position. The upper end of the first plate 2 of the mounting bracket is connected to the back of the mounting backplate 1, forming a stable support structure that effectively distributes the pressure from components such as the pressure cylinder 8. The second plate 3 is vertically connected to one side of the first plate 2 and is used to fix the pressure cylinder 8, making efficient use of space and ensuring a more secure and reliable installation of the pressure cylinder 8.

[0040] Please see Figure 1 The upper end of the first plate 2 has several longitudinally arranged strip holes 4, through which the first plate 2 is connected to the back of the mounting back plate 1, making the relative position between the mounting bracket and the mounting back plate 1 adjustable. During actual assembly, the operator can flexibly adjust the vertical position of the first plate 2 according to the specific installation space of the galvanometer, the optimal installation angle of the pressure cylinder 8, and the working requirements of the pressure foot assembly. This achieves a more precise fit between the mounting bracket and components such as the galvanometer and the pressure cylinder 8, ensuring the installation accuracy of the entire tooling system.

[0041] Please see Figure 1 Two first positioning blocks 5, located on the back of the mounting backplate 1, are engaged on the left and right sides of the first plate 2, improving the structural stability and operational reliability of the laser welding single pressure foot fixture. During welding, the downward pressure cylinder 8 generates a certain lateral force when driving the pressure foot assembly downward. If the first plate 2 rotates, it will not only affect the relative position of the pressure foot assembly and the battery connection, but may also cause uneven pressure, leading to problems such as incomplete welding or missed welding. The presence of the first positioning blocks 5, by limiting the rotation of the first plate 2, ensures that the mounting bracket and the mounting backplate 1 always maintain a vertical and stable connection, allowing the pressure applied by the downward pressure cylinder 8 to be transmitted vertically and stably to the pressure foot assembly, accurately fixing the battery connecting piece and the battery terminal, and ensuring a constant gap between them.

[0042] Please see Figure 1 The structure of the cylinder back plate 6 and the two second positioning blocks 7 on the lower side of the second plate 3 provides dual protection for the installation and operation of the pressing cylinder 8. During welding operations, the pressing cylinder 8 operates frequently. If it rotates, it will not only cause the pressing direction of the pressure foot assembly to deviate, but also result in uneven pressure distribution, making it difficult to maintain a stable gap between the battery connector and the battery terminal, easily leading to quality problems such as incomplete welding and missed welding. The two second positioning blocks 7 on the cylinder back plate 6 are positioned on the left and right sides of the pressing cylinder 8, effectively limiting its rotation and ensuring that the pressing cylinder 8 maintains a precise vertical movement trajectory during operation. In this way, the pressure applied by the pressing cylinder 8 can be vertically transmitted to the pressure foot assembly, accurately and stably fixing the battery connector and the battery terminal, maintaining the consistency of their gap, and laying a solid foundation for high-quality welding.

[0043] Please see Figure 1The adapter frame adopts a combination structure of adapter plate 9 and multiple connecting posts 10. In the laser welding single pressure foot tooling, it undertakes the functions of pressure transmission and positioning, improving the overall performance of the tooling. The adapter plate 9 is horizontally installed at the drive end of the lower pressure cylinder 8. The horizontal connection method can evenly distribute the vertical pressure generated by the lower pressure cylinder 8 to the multiple connecting posts 10, avoiding excessive force at a single point that could lead to structural deformation or damage, and ensuring that the pressure is transmitted downward stably and evenly. The multiple connecting posts 10 are circumferentially vertically connected to the lower end of the adapter plate 9, which not only enhances the structural rigidity of the adapter frame, but also further improves the support stability of the assembly through the circumferential distribution structure. During the welding process, regardless of the position of the battery connecting piece and the battery terminal, the adapter frame can ensure that the assembly and the pressure foot body 14 are always in the correct working position with its stable structure, so that the pressure foot body 14 can press down with precise angle and force, thereby effectively fixing the battery connecting piece and the battery terminal and maintaining a constant gap between them.

[0044] Please see Figure 3 The sliding cavity includes a limiting hole 11 and a sliding hole 12 connected sequentially from top to bottom. The inner diameter of the limiting hole 11 is larger than the inner diameter of the sliding hole 12. A limiting part 13 is provided at the upper end of the pressure foot body 14. The limiting part 13 is slidably disposed within the limiting hole 11, and the pressure foot body 14 is slidably disposed within the sliding hole 12. An elastic element is disposed within the limiting hole 11 and located at the upper end of the limiting part 13. The inner diameter of the limiting hole 11 is larger than the inner diameter of the sliding hole 12, and cooperates with the limiting part 13 of the pressure foot body 14 to limit the movement of the pressure foot body 14. During the welding process, when the pressing cylinder 8 drives the adapter frame and the pressing foot assembly to press down, the pressing foot body 14 slides in the sliding hole 12, and the limiting part 13 moves in the limiting hole 11. This prevents the pressing foot body 14 from coming out of the sliding cavity and limits its lateral displacement, ensuring that the pressing foot body 14 is always pressed down accurately in the vertical direction. This makes the battery connecting piece and the battery terminal post bear force evenly and the gap remains stable, avoiding problems such as poor welding and missing welding caused by the offset of the pressing foot.

[0045] When the pressure plate body 14 contacts the battery connecting piece and the battery terminal, the elastic element is compressed to generate elastic force. On the one hand, this elastic force provides a continuous and stable downward pressure to the pressure plate body 14, adapting to the unevenness of the battery connection surface and ensuring tight contact between the two. On the other hand, in special cases such as when there are high protrusions on the surface of the battery connecting piece and the battery terminal, the buffering effect of the elastic element can prevent the pressure plate body 14 from being subjected to excessive impact instantly, preventing damage to the pressure plate body 14 or battery components, while ensuring that the welding pressure is within a suitable range, effectively improving welding quality and stability.

[0046] Please see Figure 2 and Figure 3The assembly includes a first pressure plate 15, a second pressure plate 16, and a third pressure plate 17. A limiting hole 11 and a sliding hole 12 are formed from top to bottom in the middle of the first pressure plate 15. The second pressure plate 16 is located on the upper end face of the first pressure plate 15, and the third pressure plate 17 is located on the upper end face of the second pressure plate 16. The first pressure plate 15 serves as the basic load-bearing component, and its limiting hole 11 and sliding hole 12 provide a movement track for the pressure plate body 14. The second pressure plate 16 is located on the upper end face of the first pressure plate 15, and the third pressure plate 17 is located on the upper end face of the second pressure plate 16. This layered, superimposed structure significantly enhances the overall rigidity and stability of the assembly. During the welding process, the pressure of the lowering cylinder 8 is transmitted to the third pressure plate 17 and the second pressure plate 16 through the adapter frame, and finally acts on the first pressure plate 15 and the pressure plate body 14. The layered structure can evenly distribute the pressure, avoid stress concentration in a certain part, and ensure that the pressure plate body 14 slides smoothly in the sliding cavity, so that the battery connecting piece and the battery terminal are subjected to balanced force, maintain the stability of the gap between them, and reduce the risk of poor welding and missing welding.

[0047] The connecting holes 18 in the middle of the second pressure plate 16 and the third pressure plate 17 are coaxially connected to the limiting holes 11 of the first pressure plate 15. This coaxial connection design makes the internal structure of the assembly more regular and facilitates the installation and disassembly of the pressure plate body 14 and the elastic element. When it is necessary to replace the elastic element or repair the pressure plate body 14, the operator can quickly disassemble the second and third pressure plates and directly access the internal components, which greatly reduces the difficulty of maintenance, shortens the repair time, and improves the utilization efficiency of the tooling equipment.

[0048] Please see Figure 3 The elastic element consists of multiple springs 19 arranged circumferentially. These springs 19 are circumferentially positioned within the limiting holes 11 and all press against the upper end face of the pressure-bearing body 14. This arrangement ensures uniform elastic support for the pressure-bearing body 14 under stress. During welding, when the pressure-bearing body 14 contacts the battery connecting piece and the battery terminal, each spring 19 compresses synchronously, applying pressure to the pressure-bearing body 14 from multiple directions. This allows the pressure-bearing body 14 to fit more stably and evenly against the battery connection points, preventing displacement or deformation of the battery connecting piece or battery terminal due to uneven local stress. This effectively ensures a constant gap between the two, providing a reliable guarantee for high-quality welding.

[0049] Please see Figure 2 The first pressure plate 15 has a dust removal hole 20 on one side that connects to the limiting hole 11. The dust removal port can be connected to the dust collector through a pipeline to absorb the aluminum powder generated during the welding process.

[0050] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser welding single pressure foot fixture, characterized in that, include: Mounting frame, used for mounting on galvanometer; A downward pressing cylinder (8) is longitudinally fixed on the mounting frame; The adapter frame is located at the drive end of the lower part of the pressing cylinder (8); The presser foot assembly includes an assembly body and a presser foot body (14). The assembly body is disposed at the lower end of the adapter frame. The assembly body has a sliding cavity. The presser foot body (14) is slidably disposed in the sliding cavity. An elastic element is provided at the upper end of the presser foot body (14). The elastic element applies a downward elastic force to the presser foot body (14) so ​​that the lower end of the presser foot body (14) extends out of the lower end face of the assembly body and presses the battery connecting piece onto the terminal post.

2. The laser welding single pressure foot fixture as described in claim 1, characterized in that, The mounting frame includes: Mounting backplate (1) for mounting on galvanometer; The mounting bracket includes a first plate (2) and a second plate (3). The upper end of the first plate (2) is connected to the back of the mounting back plate (1), and the second plate (3) is vertically connected to one side of the first plate (2). The pressing cylinder (8) is fixed on the second plate (3).

3. The laser welding single pressure foot fixture as described in claim 2, characterized in that, The upper end of the first plate (2) has a plurality of longitudinally arranged strip holes (4), and the first plate (2) is connected to the back of the mounting back plate (1) by means of the strip holes (4).

4. The laser welding single pressure foot fixture as described in claim 2, characterized in that, The back of the mounting back plate (1) is provided with two first positioning blocks (5). The two first positioning blocks (5) are respectively locked on the left and right sides of the first plate (2) to restrict the rotation of the first plate (2).

5. The laser welding single pressure foot fixture as described in claim 2, characterized in that, A cylinder back plate (6) is provided on the lower side of the second plate (3). The cylinder body of the upper part of the pressing cylinder (8) is fixed on the cylinder back plate (6). Two second positioning blocks (7) are provided on the cylinder back plate (6). The two second positioning blocks (7) are respectively locked on the left and right sides of the pressing cylinder (8) to restrict the rotation of the pressing cylinder (8).

6. The laser welding single pressure foot fixture as described in claim 1, characterized in that, The adapter frame includes: Adapter plate (9), which is horizontally installed at the drive end of the lower part of the pressing cylinder (8); Multiple connecting posts (10) are circumferentially and vertically connected to the lower end plate of the adapter plate (9), and the assembly is connected to the lower end of the multiple connecting posts (10).

7. The laser welding single pressure foot fixture as described in claim 1, characterized in that, The sliding cavity includes a limiting hole (11) and a sliding hole (12) connected sequentially from top to bottom. The inner diameter of the limiting hole (11) is larger than the inner diameter of the sliding hole (12). The upper end of the pressure plate body (14) is provided with a limiting part (13). The limiting part (13) is slidably disposed in the limiting hole (11). The pressure plate body (14) is slidably disposed in the sliding hole (12). The elastic element is disposed in the limiting hole (11) and located at the upper end of the limiting part (13).

8. The laser welding single pressure foot fixture as described in claim 7, characterized in that, The assembly includes: The first pressure plate (15) has the limiting hole (11) and the sliding hole (12) opened from top to bottom in the middle of the first pressure plate (15); The second pressure plate (16) is disposed on the upper end surface of the first pressure plate (15); The third pressure plate (17) is disposed on the upper end surface of the second pressure plate (16); The second pressure plate (16) and the third pressure plate (17) are coaxially provided with a connecting hole (18) that communicates with the limiting hole (11).

9. A laser welding single pressure foot fixture as described in claim 8, characterized in that, The elastic element is a plurality of springs (19) arranged circumferentially. The plurality of springs (19) are arranged circumferentially in the limiting hole (11) and are all pressed against the upper end face of the pressure body (14).

10. A laser welding single pressure foot fixture as described in claim 8, characterized in that, A dust removal hole (20) is provided on one side of the first pressure plate (15) and is connected to the limiting hole (11).

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