A crimping assembly, a press fitting device, and a welding apparatus

Abstract

The utility model relates to battery welding technical field discloses a kind of crimping assembly, press fitting device and welding equipment, including connecting portion;Resist pressure portion is protruded in the side of connecting portion, and the side of resist pressure portion away from connecting portion has contact surface, and first open mouth is opened on contact surface;Sedimentation portion is along the extension direction of resist pressure portion, from the side of resist pressure portion away from connecting portion to the direction of connecting portion sedimentation and form, first channel is along the extension direction of resist pressure portion and passes through connecting portion and sedimentation portion, and at least part of sedimentation portion covers first open mouth, when resist pressure portion is pressed to be pressed piece, sedimentation portion can block the copper scrap produced by contact surface and enter first channel, the utility model will increase the contact area of crimping assembly and to be pressed piece by contact surface, can effectively slow down the wear speed of contact part, by sedimentation portion blocking copper scrap and entering first channel, effectively improve welding quality, copper scrap is limited in sedimentation portion area, easy to wipe and clean.

Description

Technical Field

[0001] This utility model relates to the field of battery welding technology, and in particular to a pressing assembly, pressing device and welding equipment. Background Technology

[0002] In the battery cell manufacturing process, laser welding is required between the connecting piece and the cover plate. During laser welding, a crimping assembly is used to press the connecting piece into close contact with the cover plate below. Currently, the crimping assemblies commonly used in the industry have a sharp-angled contact surface. Although this is suitable for welding in some confined areas, the contact area between the sharp corner and the connecting piece is small, resulting in stress concentration. Therefore, the contact area is prone to wear, and the copper shavings generated after wear can easily cause welding spalls, oxidation, and other quality problems. It also shortens the service life of the crimping assembly.

[0003] In addition, the copper shavings generated by wear penetrate the entire tooling, making them difficult to clean, increasing the difficulty of tooling maintenance and reducing production efficiency. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a crimping component, a crimping device, and a welding equipment, which can effectively slow down the wear rate of the contact parts of the crimping component and prevent copper shavings from affecting the tooling.

[0005] This utility model provides a crimping assembly, including: Connecting part; A pressing part protrudes from one side of the connecting part. The side of the pressing part away from the connecting part has a contact surface. The contact surface is used to contact the part to be pressed, and a first opening is provided on the contact surface. The settling portion is formed by settling from the side of the pressure portion away from the connecting portion toward the connecting portion along the extending direction of the pressure portion; The first channel extends through the connecting part and the settling part along the extension direction of the pressing part. The first channel is used for laser transmission. The settling part at least partially covers the first opening. When the pressing part presses against the part to be pressed, the settling part can prevent copper shavings generated on the contact surface from entering the first channel.

[0006] In the crimping assembly described above, preferably, the contact surface is arranged circumferentially along the end of the pressing portion, and the contact surface extends horizontally from the end of the pressing portion toward the center of the pressing portion.

[0007] In a crimping assembly as described above, preferably, the projected area of ​​the settling portion on the first opening is at least one-third of the first opening.

[0008] In the crimping assembly described above, preferably, the settling depth of the settling portion is 1-3 mm.

[0009] In the crimping assembly described above, preferably, the first channel is a strip-shaped through hole, the width of the first channel is in the range of 10-15mm, and the length is in the range of 65-75mm.

[0010] In the crimping assembly described above, preferably, a nitrogen channel is provided between the settling portion and the pressing portion.

[0011] In the crimping assembly described above, preferably, the connecting portion and the pressing portion are integrally formed.

[0012] In the crimping assembly described above, preferably, the pressing portion is narrowed along the extending direction of the pressing portion, from the contact end of the pressing portion and the connecting portion to the free end of the pressing portion away from the connecting portion.

[0013] This utility model also provides a pressing device, including the above-mentioned pressing assembly. The pressing device further includes an installation assembly, which is detachably connected to the pressing assembly.

[0014] This utility model also provides a welding device, including the above-mentioned pressing device.

[0015] Compared with the prior art, this utility model increases the contact area between the crimping component and the part to be crimped by increasing the contact surface, effectively dispersing stress, which can effectively slow down the wear rate of the contact part, reduce the generation of copper shavings, and prevent copper shavings from entering the first channel by the settling part, thus avoiding quality problems such as welding spatters and oxidation caused by copper shavings, effectively improving welding quality and extending the service life of the crimping component. In addition, the copper shavings are confined to the settling part area, which is easy to wipe and clean, reducing the cleaning difficulty inside the tooling, reducing maintenance time, and improving production efficiency. Attached Figure Description

[0016] Figure 1 This is a perspective view of the crimping assembly provided in an embodiment of the present invention; Figure 2 This is a front view of the crimping assembly provided in an embodiment of this utility model; Figure 3 This is a schematic diagram showing the location of the settling section provided in an embodiment of this utility model; Figure 4 This is a side view of the pressing device provided in an embodiment of this utility model.

[0017] Explanation of reference numerals in the attached figures: 10. Connecting part; 11. Rivet connection hole; 20. Pressing part; 21. Contact surface; 22. First opening; 30. Settlement zone; 40. First channel; 41. Nitrogen channel; 50. Mounting structure; 51. Mounting hole. Detailed Implementation

[0018] The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0019] The contact area of ​​the crimping components commonly used in the industry adopts a sharp-angle design because the ventilation channel used for laser transmission usually runs through the connecting part 10 and the pressing part 20. Therefore, the bottom wall of the ventilation channel has a sharp-angle structure along the edge of the pressing part 20. During use, the contact part is prone to wear. The copper shavings generated by the wear can cause quality problems such as welding spatter and oxidation, shortening the service life of the crimping component. Moreover, the copper shavings generated by the wear will directly enter the ventilation channel without any shielding, resulting in copper shavings remaining in the tooling and being difficult to clean.

[0020] See Figure 1 As shown, this utility model provides a crimping assembly, including a connecting part 10, a pressing part 20, a settling part 30, and a first channel 40, wherein: The connecting part 10 is used to connect the mounting structure 50 of the laser welding device; the pressing part 20 protrudes from one side of the connecting part 10, and the side of the pressing part 20 away from the connecting part 10 has a contact surface 21, which is used to contact the part to be pressed, and a first opening 22 is provided on the contact surface 21; the settling part 30 is formed by settling from the side of the pressing part 20 away from the connecting part 10 toward the connecting part 10 along the extending direction of the pressing part 20; the first channel 40 passes through the connecting part 10 and the settling part 30 along the extending direction of the pressing part 20, and the first channel 40 is used for laser transmission. At least part of the settling part 30 covers the first opening 22. When the pressing part 20 presses against the part to be pressed, the settling part 30 can prevent copper chips generated by the contact surface 21 from entering the first channel 40. In the embodiments provided in this application, when the crimping assembly presses against the part to be pressed, the contact surface 21 contacts the part to be pressed. By increasing the contact area with the part to be pressed, the pressure is dispersed, thereby reducing the amount of wear at the contact point from the source and slowing down its wear rate.

[0021] In the existing structure, copper shavings generated by sharp corner wear fall directly into the ventilation channels. These channels are narrow and extend deep into the tooling, making cleaning extremely difficult. (See also...) Figure 1-3As shown, in this embodiment, the settling portion 30 settles from the side of the pressing portion 20 away from the connecting portion 10 towards the connecting portion 10 to form a stepped structure. The settling portion 30 at least partially blocks the first opening 22. When a small amount of copper shavings is generated on the contact surface 21, the shavings will first fall onto the stepped surface of the settling portion 30 and be blocked by the settling portion 30, preventing them from crossing the step and entering the smaller first channel 40. This avoids copper shavings entering the first channel 40 and contaminating the tooling, causing welding spatter, oxidation, and other quality problems, effectively increasing the service life of the crimping assembly. Furthermore, when copper shavings fall onto the stepped surface of the settling portion 30, they are easier to wipe and clean.

[0022] See Figure 1-2 As shown, in this embodiment, the contact surface 21 is arranged circumferentially along the end of the pressing part 20, and extends horizontally from the end of the pressing part 20 towards the center of the pressing part 20. The contact surface 21 has a planar structure, which can completely fit with the part to be pressed when in contact, and the pressure is evenly distributed throughout the contact area. However, the contact area between the contact surface 21 and the connecting piece should not be too large to avoid the contact surface 21 interfering with surrounding components or causing wrinkles or deformation of the part to be pressed.

[0023] In this embodiment, the first channel 40 is coaxial with the first opening 22, and the projected area of ​​the settling part 30 on the first opening 22 is at least one-third of the area of ​​the first opening 22. The purpose is to enable the settling part 30 to provide sufficient shielding without interfering with laser transmission.

[0024] In this embodiment, the component to be pressed is a connecting piece. Based on the dimensions of conventional connecting pieces, see [reference needed]. Figure 3 As shown, in some embodiments of this application, the settling depth of the settling portion 30 is 1-3 mm. The function of the settling portion 30 is to block copper shavings generated by the contact surface 21. If the depth is too shallow, copper shavings may still enter the first channel 40 due to the airflow during welding, even if they pass through the settling portion 30. If the depth is too deep, the stepped surface of the settling portion 30 will form a deep groove, making it difficult to clean the accumulated copper shavings. Furthermore, the first channel 40 penetrates both the settling portion 30 and the connecting portion 10. When the laser passes through the first channel 40, a stable optical path space is required. Therefore, in this embodiment, a settling depth of 1-3 mm can form an effective copper shavings blocking barrier and also avoid interfering with laser transmission. As a preferred embodiment, the settling depth of the settling portion 30 is 2 mm.

[0025] See Figure 1-2In this embodiment, the first channel 40 is a strip-shaped through hole with a width ranging from 10-15 mm and a length ranging from 65-75 mm. The welding area of ​​the component to be pressed, i.e., the connecting piece, is typically elongated. Therefore, the first channel 40 is designed as a strip-shaped through hole to meet the path requirements of long-distance continuous welding. After adding the settling part 30, the stepped surface of the settling part 30 blocks the first opening 22. Therefore, the width of the first channel 40 is at least smaller than the existing ventilation channel. According to welding requirements, the first channel 40 needs to reserve sufficient optical path tolerance space so that even if the laser head slightly deviates due to mechanical errors, it will not be blocked by the wall of the first channel 40. If the first channel 40 is too narrow, it may block the laser; if it is too wide, the stepped surface of the settling part 30 cannot effectively block copper chips, increasing the risk of copper chips entering the channel. Therefore, in this embodiment, the width of the first channel 40 is 10-15 mm, preferably 12 mm. It should be noted that the above size range is only an feasible range for the case where the part to be pressed is a connecting piece. This crimping assembly can also be used for other parts to be pressed, and the size can be adapted according to the part to be pressed. No limitation is made here.

[0026] See Figure 1 As shown, in this embodiment, a nitrogen channel 41 is provided between the settling part 30 and the pressing part 20. This channel is used to transport protective gases such as nitrogen, which can remove welding impurities, ensure channel cleanliness, and also cool the welding area to reduce heat impact.

[0027] In some embodiments of this application, the connecting portion 10 and the pressing portion 20 are integrally molded structures with no seams between them, ensuring the overall structural strength. Furthermore, along the extending direction of the pressing portion 20, from the contact end between the pressing portion 20 and the connecting portion 10 to the free end of the pressing portion 20 away from the connecting portion 10, the pressing portion 20 narrows. This allows the pressure to be more concentrated in the contact area with the connecting piece, improving the tightness of the clamping and achieving a lightweight design.

[0028] See Figure 4 As shown, this utility model also provides a pressing device, including the above-mentioned pressing assembly.

[0029] The pressing device also includes an installation component, which is detachably connected to the pressing component. Specifically, the connecting part 10 has several rivet connection holes 11, and the installation component has several mounting holes 51. The components are connected by rivets through the rivet connection holes 11 and the mounting holes 51. When the pressing component is worn, it can be directly replaced without replacing the entire pressing device.

[0030] This utility model also provides a welding device, including the above-mentioned pressing device.

[0031] The above description, based on the embodiments shown in the drawings, details the structure, features, and effects of this utility model. The above description is only a preferred embodiment of this utility model, but the scope of implementation of this utility model is not limited to what is shown in the drawings. Any changes made in accordance with the concept of this utility model, or modifications to equivalent embodiments, that do not exceed the spirit covered by the specification and drawings, shall be within the protection scope of this utility model.

Claims

1. A crimping assembly, characterized in that, include: Connecting part; A pressing part protrudes from one side of the connecting part. The side of the pressing part away from the connecting part has a contact surface. The contact surface is used to contact the part to be pressed, and a first opening is provided on the contact surface. The settling portion is formed by settling from the side of the pressure portion away from the connecting portion toward the connecting portion along the extending direction of the pressure portion; The first channel extends through the connecting part and the settling part along the extension direction of the pressing part. The first channel is used for laser transmission. The settling part at least partially covers the first opening. When the pressing part presses against the part to be pressed, the settling part can prevent copper shavings generated on the contact surface from entering the first channel.

2. The crimping assembly according to claim 1, characterized in that, The contact surface is arranged circumferentially along the end of the pressing part, and extends horizontally from the end of the pressing part toward the center of the pressing part.

3. The crimping assembly according to claim 1, characterized in that, The projected area of ​​the settling portion on the first opening is at least one-third of the area of ​​the first opening.

4. The crimping assembly according to claim 1, characterized in that, The settlement depth of the settlement section is 1-3 mm.

5. The crimping assembly according to claim 1, characterized in that, The first channel is a strip-shaped through hole, with a width ranging from 10-15mm and a length ranging from 65-75mm.

6. The crimping assembly according to claim 1, characterized in that, A nitrogen channel is provided between the settling section and the pressure-reducing section.

7. The crimping assembly according to claim 1, characterized in that, The connecting part and the pressing part are integrally formed.

8. The crimping assembly according to claim 1, characterized in that, Along the extending direction of the pressing part, from the end where the pressing part and the connecting part meet to the free end of the pressing part away from the connecting part, the pressing part is in a narrowing posture.

9. A pressing device, characterized in that, The pressing device includes the pressing assembly as described in any one of claims 1-8, and further includes a mounting assembly, the mounting assembly being detachably connected to the pressing assembly.

10. A welding device, characterized in that, Includes the pressing device as described in claim 9.

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