Aluminum copper negative pole post controlled deformation needleless spot welding production device

Abstract

The utility model discloses a kind of aluminum copper negative pole control deformation needleless spot welding production device, it is related to negative pole production technical field, including first carrier, second carrier, spot welding tool, control deformation tool and driving source, first carrier is used to support copper sheet, second carrier is used to support aluminum column, spot welding tool can be rotated state and copper sheet middle part make similar motion until and it is in contact, control deformation tool is equipped with two groups and is used to respectively contact the top surface of copper sheet two end parts, driving source is used to drive second carrier aluminum column and copper sheet make similar action, to make aluminum column and copper sheet mutual contact and press together. Two groups of control deformation tool set by the utility model can actively constrain and guide the deformation behavior of copper sheet two end parts in welding process, not only effectively prevent warping or deformation caused by pressure and heat, but also guarantee the flatness and bonding quality of welding interface, so that negative pole blank after welding forming does not need to make orthopaedic machining process.

Description

Technical Field

[0001] This utility model relates to the field of negative electrode post production technology, specifically to a needleless spot welding production device for controlled deformation of aluminum-copper negative electrode posts. Background Technology

[0002] Currently, aluminum-copper negative electrode posts (usually composed of copper sheets and aluminum posts) are increasingly widely used in new energy batteries, power electronics, and other fields. Their mainstream production processes mainly include aluminum-copper rotary friction welding and aluminum-copper composite plate machining; however, both of these methods have significant efficiency and cost bottlenecks.

[0003] Taking aluminum-copper rotary friction welding as an example, although aluminum-copper rotary friction welding can achieve connection, it requires large equipment investment, complex process, weak connection performance at the center, and is prone to generating burrs and excess material during welding, resulting in waste of raw materials. Taking the machining of aluminum-copper composite panels as an example, the prefabricated aluminum-copper composite panels are formed by mechanical processing, which requires multiple cutting processes. Not only is the utilization rate of precious aluminum and copper materials low and a large amount of waste generated, but it also significantly increases the processing time of machine tools and labor costs.

[0004] In summary, the aforementioned issues collectively increase the manufacturing cost of aluminum-copper negative electrodes, limiting their large-scale and economical production. Utility Model Content

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a needleless spot welding production device for aluminum-copper negative electrode column deformation control. This device reduces the generation of waste during the welding process, and by pre-limiting the position of the copper sheet, it actively constrains and guides the deformation behavior of both ends of the copper sheet during the welding process, effectively preventing warping or deformation caused by pressure and heat, and avoiding the need for subsequent straightening machining processes.

[0006] To solve the above problems, this utility model provides the following technical solution: A needle-free spot welding production device for controlled deformation of aluminum-copper negative electrode columns, comprising: The first carrier is used to support the copper sheet; The second carrier is used to support the aluminum column; The spot welding tool can rotate and move close to the center of the copper sheet until it comes into contact with it. The deformation control fixture is set into two sets and used to contact the top surfaces of the two ends of the copper sheet respectively; The driving source is used to drive the second carrier to move the aluminum column toward the copper sheet in a similar motion, so that the aluminum column and the copper sheet come into contact and press together.

[0007] As a further embodiment of this utility model: two sets of deformation control fixtures are located on both sides of the spot welding tool, and both sets of deformation control fixtures are slidably mounted on the first carrier so that the bottom end face of the deformation control fixture can slidably contact the top end face of the copper sheet.

[0008] As a further embodiment of this utility model: both sets of control deformation tooling are provided with contour grooves on the side near the spot welding tool to adapt to the shape of the spot welding tool.

[0009] As a further embodiment of this utility model: a follower block is fixedly provided on the side of the deformation control fixture, and a limiting block is provided on the first carrier within the range of the follower block's movement path, so that when the bottom end face of the deformation control fixture slides into contact with the corresponding position of the top surface of the copper sheet end, the follower block and the limiting block are in a contacting state; the position of the limiting block on the first carrier is adjustable.

[0010] As a further embodiment of this invention, the device also includes a displacement sensor disposed on the second carrier and a baffle disposed on the side of the second carrier. The baffle is located within the working range of the displacement sensor and its position is adjustable along the movement direction of the second carrier.

[0011] As a further embodiment of this utility model: a label is provided on the side of the second carrier for the movable installation of the baffle.

[0012] As a further embodiment of this utility model: the first carrier is provided with a positioning groove and a through hole from top to bottom, and the positioning groove and the through hole are connected. The positioning groove is used for placing copper sheets. The top of the second carrier can be inserted into the through hole from bottom to top, and the top and the through hole together form a placement area for placing aluminum pillars. The second carrier can push the aluminum pillars to move upwards and make them contact the copper sheets from top to bottom.

[0013] As a further embodiment of this utility model: a loading module is detachably mounted on the first carrier, and positioning grooves and through holes are both provided on the loading module; the loading module is configured as multiple sets and one of them is selectively mounted on the first carrier.

[0014] As a further embodiment of this utility model: a slide rail for sliding installation of the control deformation tool is fixedly provided on the first carrier, and a power source for driving the control deformation tool to move is also provided on the first carrier.

[0015] As a further embodiment of this utility model, the device also includes a tool holder that can be raised, lowered and rotated, and the spot welding tool can be detachably installed on the tool holder.

[0016] As a further embodiment of this utility model, the spot welding tool has a rod-shaped structure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This device integrates welding and shape control. During operation: the first and second carriers ensure the initial precise positioning of the copper sheet and aluminum column, respectively. Then, the spot welding tool approaches and contacts the copper sheet in a rotating posture, utilizing frictional heat to provide the necessary energy for welding. The drive source precisely controls the aluminum column to press the copper sheet upward, achieving solid-state bonding. This welding method reduces burrs and excess waste, minimizing raw material waste. Simultaneously, the two sets of deformation control fixtures actively constrain and guide the deformation behavior of both ends of the copper sheet during welding. This not only effectively prevents warping or deformation caused by pressure and heat but also ensures the flatness and bonding quality of the weld interface, eliminating the need for straightening machining of the welded negative electrode blank.

[0018] 2. The components used to prevent thermal deformation at both ends of the copper sheet are set as two sets of deformation control fixtures, and the two sets of deformation control fixtures are slidably installed on both sides of the spot welding tool, so that the deformation control fixtures can not only position the copper sheet before welding, but also constrain the deformation behavior of both ends of the copper sheet during the welding pressing process.

[0019] 3. By setting a contoured groove on the side of the deformation control fixture near the spot welding tool, effective avoidance of the welding area is achieved. This groove matches the shape of the spot welding tool, providing sufficient movement space and preventing interference when the tool is pressed down and rotated. Simultaneously, this enclosed structure better confines welding pressure and the heat-affected zone within a preset range, further concentrating energy and controlling material flow. This results in more complete and uniform diffusion of metal atoms at the aluminum-copper interface, contributing to the formation of welded joints with higher strength and fewer defects.

[0020] 4. Through the cooperation of the follower block and the adjustable limit block, a precise and flexible mechanical limit is provided for the sliding stroke of the deformation control fixture. When the follower block and the limit block collide, the fixture stops immediately, ensuring that the constraint position of the fixture on the copper sheet is consistent in each welding process, thus ensuring the consistency of the negative electrode blank. At the same time, since the position of the limit block on the first carrier is adjustable, the device can quickly adapt to copper sheets of different specifications and sizes. It can achieve flexible switching of production tasks without changing the main body of the fixture, which enhances the versatility and production efficiency of the equipment and reduces changeover time and cost.

[0021] 5. The displacement sensor monitors the advancing displacement of the second carrier (or aluminum pillar) in real time. When the carrier moves to the preset position of the baffle, the system can determine that the target pressing depth has been reached and stop driving, effectively preventing under-pressuring or over-pressuring and ensuring the stable welding quality of each product. At the same time, the adjustable position of the baffle allows this depth parameter to be flexibly set according to the requirements of different negative electrode posts.

[0022] 6. By opening a connecting positioning groove and a through hole on the first carrier, the positioning groove ensures that the horizontal position of the copper sheet is accurate, while the placement area formed by the top of the second carrier and the through hole ensures that the aluminum column can automatically achieve concentric positioning with the copper sheet. When the second carrier moves upward, the aluminum column is pushed vertically and accurately towards the copper sheet, improving the positioning accuracy and repeatability.

[0023] 7. When producing negative electrode posts of different specifications, operators do not need to make complex adjustments to the entire machine. They only need to replace the pre-prepared loading module with corresponding sized positioning slots and through holes, which greatly shortens the equipment preparation time and maximizes equipment utilization. At the same time, the modular design also facilitates the replacement and maintenance of worn parts, reducing the total life cycle cost of the equipment. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings.

[0025] Figure 1 This is a front view structural diagram of the present invention; Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along line AA; Figure 3 yes Figure 2 A schematic diagram of a local structure in the image; Figure 4 yes Figure 3 A schematic diagram of the structure without copper sheets and aluminum pillars in the current state; Figure 5 This is a three-dimensional structural diagram of the spot welding tool and the carrying module in this utility model; Figure 6 This is a three-dimensional structural diagram of the two sets of controlled deformation tooling and spot welding fixture in this utility model; Figure 7 This is a schematic diagram of the three-dimensional structure of the two sets of controlled deformation tooling in this utility model; Figure 8 This is a schematic diagram of the negative electrode post structure of this utility model.

[0026] In the diagram: 1. First carrier; 2. Second carrier; 3. Spot welding tool; 4. Deformation control fixture; 401. Contouring groove; 402. Follower block; 5. Drive source; 6. Limiting block; 7. Displacement sensor; 8. Baffle; 9. Identifier; 10. Positioning groove; 11. Through hole; 12. Power source; 13. Tool holder; 14. Loading module; a. Copper sheet; b. Aluminum column. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0028] like Figures 1-2 and Figure 5 As shown, a needle-free spot welding production device for aluminum-copper negative electrode column-controlled deformation includes a machine base and a spot welding fixture (preferably a rod-shaped structure) 3. A first carrier 1 is horizontally fixed on the machine base, and a second carrier 2 is movably arranged on the machine base along the vertical direction, with the top of the second carrier 2 able to pass through the middle position of the first carrier 1 from bottom to top. The spot welding fixture 3 is located directly above the middle position of the first carrier 1 and is mounted on a tool holder 13. When the tool holder 13 rotates and moves up and down, the spot welding fixture 3 can move accordingly, that is, the bottom end of the spot welding fixture 3 can move towards the middle position of the first carrier 1 in a high-speed rotating state.

[0029] like Figure 4 As shown, a positioning groove 10 and a through hole 11 are provided in the middle of the first carrier 1 from top to bottom, and the positioning groove 10 and the through hole 11 are connected. The positioning groove 10 is located directly below the spot welding tool 3. The positioning groove 10 is used to place the copper sheet a. The through hole 11 is used to insert the top of the second carrier 2, and the top and the through hole 11 together form a placement area for placing the aluminum column b.

[0030] After the copper sheet a and aluminum column b are placed, the bottom end of the spot welding tool 3 is moved toward the copper sheet a until it contacts the surface of the copper sheet a. Then, relying on the upward pushing action of the second carrier 2, the aluminum column b can be pushed upward to make contact with the copper sheet a. This state can be achieved by... Figure 3 This is used to represent the process. Next, the spot welding fixture 3 is driven to rotate at high speed, generating heat on the top surface of the copper sheet a. This heat is conducted to the aluminum pillar b below, causing the tip of the aluminum pillar b in contact with the copper sheet a to heat up and soften until it melts. Since the second carrier 2 maintains an upward pushing action throughout this process, the aluminum pillar b is pushed upwards. When the aluminum pillar b is pushed to the designated position, it indicates that the aluminum pillar b has reached the predetermined welding position. The second carrier 2 then remains stationary in this position, and the spot welding fixture 3 stops rotating. That is, the second carrier 2 maintains its upward pushing action on the aluminum pillar b, while the first carrier 1 maintains its downward pressing action on the copper sheet a. Under these two actions, the molten aluminum between the aluminum pillar b and the copper sheet a cools and solidifies, allowing the copper sheet a and the aluminum pillar b to be welded into a negative electrode blank. The negative electrode blank can be... Figure 8This is used to represent the process. Finally, the tool holder 13 drives the spot welding fixture 3 to reset upwards, and the second carrier 2 first pushes the negative electrode blank upwards to detach from the tooling, and then resets downwards.

[0031] During the aforementioned welding process, since the copper sheet a is only subjected to the downward rotational contact of the spot welding tool 3, and generally only the bottom end of the spot welding tool 3 contacts the middle of the copper sheet a, the end of the copper sheet a is prone to thermal deformation, requiring subsequent straightening treatment of the negative electrode blank after welding. Therefore, this application adds a controlled deformation fixture 4, such as... Figure 1 and Figure 6 As shown, the deformation control fixture 4 is configured in two sets, which act on both ends of the copper sheet a respectively. Specifically, the two sets of deformation control fixtures 4 are respectively set on both sides of the spot welding fixture 3, and both sets of deformation control fixtures 4 are slidably mounted on the first carrier 1. The two sets of deformation control fixtures 4 can both move in close proximity towards the spot welding fixture 3. When the two sets of deformation control fixtures 4 have moved to the designated positions, the bottom end faces of the two sets of deformation control fixtures 4 are in contact with the top end face of the copper sheet a. During the subsequent welding process, the bottom end face of the deformation control fixture 4 and the cavity of the positioning groove 10 limit the upper and lower movement of the copper sheet a, so that the copper sheet a will not undergo thermal deformation, that is, no subsequent straightening machining is required. The part of the deformation control fixture 4 that contacts the copper sheet a is made of steel, and the material can be the same as that of the spot welding fixture 3.

[0032] To prevent the deformation control fixture 4 from interfering with the welding action of the spot welding tool 3, this application provides contoured grooves 401 on the side of both sets of deformation control fixtures 4 closest to the spot welding tool 3 to adapt to the shape of the spot welding tool 3. The arrangement of the two sets of deformation control fixtures 4 and the spot welding tool 3 can be determined by... Figure 6 To represent this, the layout of the two sets of control deformation tooling 4 can be determined by... Figure 7 To represent it.

[0033] Furthermore, in order to enable the controlled deformation fixture 4 to move toward the spot welding tool 3 and stop at the designated position, this application provides a follower block 402 fixedly installed on the side of the controlled deformation fixture 4. Correspondingly, a limiting block 6 is provided on the first carrier 1 within the range of the follower block 402's movement path. When the bottom end face of the controlled deformation fixture 4 slides to contact the corresponding position of the top end face of the copper sheet a, the follower block 402 and the limiting block 6 are in a contacting state. The limiting block 6 can be used to limit and stop the position of the controlled deformation fixture 4, ensuring that the controlled deformation fixture 4 always moves and stops at the same position.

[0034] When welding another type of copper sheet a, the endpoint position where the control deformation tool 4 stops may change. Therefore, this application sets the position limit block 6 on the first carrier 1 to be adjustable. Specifically, a screw is horizontally arranged on the side of the first carrier 1, and a nut is threaded on the screw. This nut replaces the position limit block 6. When the nut is driven to rotate, the position of the nut on the screw can be changed, thereby adjusting the horizontal position of the nut. This also allows for limiting and stopping the follower block 402 at different positions.

[0035] For the sliding installation of the controlled deformation tool 4 on the first carrier 1, a slide rail for the controlled deformation tool 4 to slide on the first carrier 1 can be fixedly provided. At the same time, a power source (such as a cylinder) 12 for driving the controlled deformation tool 4 to move is also provided on the first carrier 1. The execution end of the power source 12 is fixedly connected to the controlled deformation tool 4.

[0036] Regarding the implementation of the up-and-down movement of the second carrier 2 mentioned above, this application provides a drive source (such as a hydraulic cylinder) 5 on the machine base. The execution end of the drive source 5 is fixedly connected to the bottom end of the second carrier 2. The drive source 5 can drive the second carrier 2 to move up or down. At the same time, the drive source 5 can also make the second carrier 2 maintain an upward pushing force on the aluminum column b.

[0037] For the design where the aluminum column b needs to be pushed upwards to a designated position and then stopped during the welding process, this application adds a displacement sensor 7, which is mounted on the second carrier 2. Simultaneously, a baffle 8 is also provided on the machine tool, located within the working range of the displacement sensor 7. When the second carrier 2 is driven upwards by the drive source 5, the displacement sensor 7 moves upwards accordingly. When the displacement sensor 7 senses the baffle 8, it stops the second carrier 2 from moving upwards, maintaining an upward pushing trend to achieve vertical contact between the aluminum column b and the copper sheet a. In some specific embodiments, the displacement sensor 7 can be a slotted photoelectric switch. Furthermore, to facilitate the adjustment of the baffle 8 to the appropriate position, this application provides a marking element 9 on the machine tool. The baffle 8 is mounted on the marking element 9, which has graduations. The baffle 8 can be adjusted to the appropriate position according to the graduations. The marking element 9 can be a conventional vernier caliper or a conventional ruler, etc., and this application is not limited to this.

[0038] like Figure 5As shown, in order to enable welding of different types of copper sheets a and aluminum pillars b, this application has a detachable loading module 14 installed in the middle of the first carrier 1. Correspondingly, the positioning groove 10 and through hole 11 originally located in the middle of the first carrier 1 are also set on the loading module 14. The loading module 14 is configured in multiple groups, and the positioning groove 10 and through hole 11 on each group of loading modules 14 are of different sizes. When welding of a certain type of copper sheet a and aluminum pillar b is required, a loading module 14 that is compatible with the size of the copper sheet a and aluminum pillar b can be selected.

[0039] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the claims of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A needle-free spot welding production device for controlled deformation of aluminum-copper negative electrode, characterized in that, include: The first carrier (1) is used to support the copper sheet (a). The second carrier (2) is used to support the aluminum column (b); The spot welding tool (3) can rotate and move close to the center of the copper sheet (a) until it comes into contact with it; The driving source (5) is used to drive the second carrier (2) to move the aluminum column (b) toward the copper sheet (a) to make the aluminum column (b) and the copper sheet (a) come into contact and press together.

2. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to claim 1, characterized in that, The device also includes a deformation control fixture (4), which is configured in two sets and used to contact the top surfaces of both ends of the copper sheet (a) respectively.

3. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to claim 2, characterized in that, Two sets of deformation control fixtures (4) are located on both sides of the spot welding tool (3), and both sets of deformation control fixtures (4) are slidably installed on the first carrier (1) so that the bottom end face of the deformation control fixture (4) can slide to contact the top end face of the copper sheet (a).

4. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to claim 3, characterized in that, Both sets of deformation control fixtures (4) have contour grooves (401) on the side near the spot welding tool (3) to adapt to the shape of the spot welding tool (3).

5. A needle-free spot welding production device for aluminum-copper negative electrode column controlled deformation according to any one of claims 2-4, characterized in that, The side of the control deformation tool (4) is fixedly provided with a follower block (402), and the first carrier (1) is provided with a limiting block (6) located within the range of the movement path of the follower block (402), so that when the bottom end face of the control deformation tool (4) slides to contact the corresponding position of the top surface of the end of the copper sheet (a), the follower block (402) and the limiting block (6) are in a contact state; the position of the limiting block (6) on the first carrier (1) is adjustable.

6. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to any one of claims 1-4, characterized in that, The device also includes a displacement sensor (7) disposed on the second carrier (2) and a baffle (8) disposed on the side of the second carrier (2). The baffle (8) is located within the working range of the displacement sensor (7) and its position is adjustable along the movement direction of the second carrier (2).

7. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to claim 6, characterized in that, The second carrier (2) has a label (9) on its side for the movable installation of the baffle (8).

8. A needle-free spot welding production device for aluminum-copper negative electrode column-controlled deformation according to any one of claims 1-4, characterized in that, The first carrier (1) has a positioning groove (10) and a through hole (11) from top to bottom, and the positioning groove (10) and the through hole (11) are connected. The positioning groove (10) is used to place the copper sheet (a). The top of the second carrier (2) can be inserted into the through hole (11) from bottom to top, and the top and the through hole (11) together form a storage area for placing the aluminum column (b). The second carrier (2) can push the aluminum column (b) to move upward and make it in contact with the copper sheet (a) from top to bottom.

9. The aluminum-copper negative electrode column-controlled deformation needleless spot welding production device according to claim 8, characterized in that, The first carrier (1) is detachably mounted with a loading module (14), and the positioning groove (10) and through hole (11) are both set on the loading module (14); the loading module (14) is set in multiple groups and one is selected to be installed on the first carrier (1).

10. A needle-free spot welding production device for aluminum-copper negative electrode column-controlled deformation according to any one of claims 1-4, characterized in that, The spot welding tool (3) has a rod-shaped structure.

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