A production system of a negative pole post

Abstract

The application discloses a production system of a negative pole post and relates to the technical field of negative pole posts, which comprises a first carrier for supporting a copper sheet, a second carrier for supporting an aluminum post, an acting piece for heating the copper sheet, a driving source for driving the second carrier to move the aluminum post towards the copper sheet, so that the aluminum post and the copper sheet are in contact and are pressed together to form a negative pole post blank, a stamping and straightening composite mechanism for straightening the processed negative pole post blank, a tensile test tool and / or a tear test tool for testing the straightened negative pole post blank. The application integrates the supporting, heating, pressing, straightening and testing processes through the integration of various components, and a complete negative pole post automatic production system is constructed, so that the negative pole post can be produced on a large scale and economically.

Description

Technical Field

[0001] This invention relates to the field of negative electrode technology, and more specifically to a negative electrode production system. 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, has a complex process, weak connection performance at the center, and is prone to producing burrs and excess material during the welding process, 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 aluminum and copper precious metal 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. Summary of the Invention

[0005] The purpose of this invention is to solve the problems in the prior art by proposing a production system for negative electrode posts. This system integrates multiple processes such as support, heating, pressing, shaping and testing through the integration of various components, and constructs a complete automated production system for negative electrode posts, enabling the large-scale and economical production of negative electrode posts.

[0006] To address the above problems, the present invention provides the following technical solution: A negative electrode post production system, comprising: The first carrier is used to support the copper sheet; The second carrier is used to support the aluminum column; The active component is used to heat the copper sheet; 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 with each other and press together to form a negative electrode column blank. A stamping and straightening composite mechanism is used to stamp and straighten the formed negative electrode column blank. Tensile testing fixtures and / or tear testing fixtures are used to test the shaped negative electrode blank.

[0007] Compared with the prior art, the present invention has the following beneficial effects: 1. This application integrates multiple processes such as support, heating, pressing, straightening, and testing through the integration of various components, constructing a complete automated production system for negative electrode posts, enabling large-scale and economical production of negative electrode posts. Specifically, the first and second carriers stably support the copper sheet and aluminum post respectively. After the copper sheet is heated by the actuator, the drive source precisely controls the pressing of the aluminum post and copper sheet to form a blank, ensuring the continuity and efficiency of the production process. The stamping and straightening composite mechanism processes and trims the blank, improving the dimensional accuracy of the product. The tensile and tear testing fixtures comprehensively evaluate the mechanical properties of the product, thereby ensuring the reliability and consistency of the negative electrode posts, reducing manual intervention, and improving production efficiency.

[0008] 2. The system heats the copper sheet using two methods: frictional heating and heat conduction, allowing it to flexibly adapt to different process requirements. Specifically, frictional heating is energy-efficient and suitable for rapid, localized heating; while heat conduction provides uniform temperature distribution, which is beneficial for overall thermal management.

[0009] 3. When using frictional heating, there are two possible implementation methods: (1) By combining spot welding tools and deformation control fixtures, the deformation of copper sheets during the heating process can be effectively controlled. The deformation control fixture slides in contact with both ends of the copper sheet to prevent warping or displacement, ensuring the stability of the heating area, thereby improving welding consistency and product qualification rate.

[0010] (2) The welding tool assembly integrates the first tool holder, the welding tool and the stationary shoulder welding tool to realize the stationary shoulder friction welding technology. The stationary shoulder applies static pressure to reduce material spatter and deformation. The welding tool rotates and generates heat to improve welding strength and quality, thereby improving product durability and production efficiency.

[0011] 4. When using heat conduction, the heat source achieves rapid and efficient heating through the adapter block, heating rod, and induction heating coil. The induction heating coil ensures uniform heating of the heating rod and strong temperature controllability. The protective baffle reduces heat loss and safety risks, ensuring a stable and reliable heating process for the copper sheet.

[0012] 5. The upper die, lower die, die cavity, and step design of the stamping and straightening composite mechanism integrate stamping and straightening functions. The first step works with the upper die to shear the edge of the copper sheet, and the second step forms a stepped hole structure. Straightening and finishing can be completed in one operation, improving efficiency and quality. This integrated design reduces process changes, lowers equipment costs, and ensures product dimensional accuracy.

[0013] 6. The tensile testing fixture integrates a frame, clamps, cylinder, and tensile sensor to accurately measure the tensile properties of the negative electrode post. The tensile sensor is connected to a force gauge to record tensile force data in real time and evaluate the mechanical strength of the product. This design offers high testing accuracy and is easy to operate. For aluminum-copper composite negative electrode posts that are in the process development stage, immediate testing can be conducted on the production site or composite workshop to quickly provide feedback and adjust process parameters.

[0014] 7. The tear test fixture simulates real tearing conditions through a base, clamps, and sliding supports. The clamps are adjustable, which has the advantage of adapting to workpieces of different sizes. The sliding supports move the tear point along the tensile direction, which can accurately test the joint strength and well evaluate the welding quality. Attached Figure Description

[0015] The invention will now be further described with reference to the accompanying drawings.

[0016] Figure 1 This is a front view structural diagram of Embodiment 1 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 carrier module in Embodiment 1 of the present invention; Figure 6 This is a three-dimensional structural diagram of the two sets of deformation control fixtures and spot welding tools in Embodiment 1 of the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the two sets of controlled deformation tooling in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of the negative electrode post structure in this invention. Figure 1 ; Figure 9 This is a front view structural diagram of Embodiment 2 of the present invention; Figure 10 yes Figure 9 Enlarged structural diagram at point A; Figure 11 This is a partial three-dimensional structural schematic diagram of Embodiment 2 of the present invention; Figure 12 This is a schematic diagram of the three-dimensional structure of the first carrier and the second carrier in Embodiment 2 of the present invention; Figure 13 This is a front view structural diagram of Embodiment 3 of the present invention; Figure 14yes Figure 13 Schematic diagram of the cross-sectional structure along line AA; Figure 15 This is a cross-sectional view of the cargo platform in Embodiment 3 of the present invention; Figure 16 This is a cross-sectional view of the static shoulder welding fixture and the welding fixture in Embodiment 3 of the present invention; Figure 17 This is a front view structural diagram of the welding fixture assembly in Embodiment 3 of the present invention; Figure 18 yes Figure 17 Schematic diagram of the cross-sectional structure along line BB; Figure 19 yes Figure 18 A schematic diagram of a local structure in the image; Figure 20 This is a three-dimensional structural diagram of the welding fixture assembly in Embodiment 3 of the present invention; Figure 21 This is a three-dimensional structural diagram of the welding fixture in Embodiment 3 of the present invention; Figure 22 This is a front view structural diagram of Embodiment 4 of the present invention; Figure 23 This is a side view structural diagram of Embodiment 4 of the present invention; Figure 24 yes Figure 23 Schematic diagram of the cross-sectional structure along line AA; Figure 25 yes Figure 24 A schematic diagram of a local structure in the image; Figure 26 yes Figure 25 A schematic diagram of the structure with the negative electrode post removed; Figure 27 yes Figure 26 A schematic diagram of a local structure in the image; Figure 28 This is a schematic diagram of the three-dimensional structure of the lower mold in Embodiment 4 of the present invention; Figure 29 This is a schematic diagram of the structure of the first step at the lower mold in Embodiment 4 of the present invention; Figure 30 This is a three-dimensional structural schematic diagram of the tensile test in Embodiment 5 of the present invention; Figure 31 This is a schematic diagram of the exploded structure of the tensile test in Embodiment 5 of the present invention; Figure 32 This is a schematic diagram of the movable fixture split structure for tensile testing according to Embodiment 5 of the present invention; Figure 33 This is a schematic diagram of the split structure of the fixing fixture for the tensile test in Embodiment 5 of the present invention; Figure 34This is a schematic diagram of the three-dimensional structure of the negative electrode post to be tested in the tensile test of Embodiment 5 of the present invention; Figure 35 This is a schematic diagram of the negative electrode post structure in this invention. Figure 2 ; Figure 36 This is a three-dimensional structural schematic diagram of the tear test in Embodiment 5 of the present invention; Figure 37 This is a schematic diagram of the exploded structure of the tear test in Embodiment 5 of the present invention.

[0017] In the diagram: 1. First carrier; 101. Support claw; 102. Positioning step; 2. Second carrier; 201. Limiting groove; 3. Spot welding tool; 4. Deformation control fixture; 401. Contouring groove; 402. Follower block; 5. Drive source; 6. Limiting block; 7. First displacement sensor; 8. First baffle; 9. First marking piece; 10. Positioning groove; 11. Through hole; 12. Power source; 13. First tool holder; 14. Loading module; a. Copper sheet; b. Aluminum column; 15. Heat source; 16. Adapter block; 17. Heating rod; 18. Induction heating coil; 19. Protective baffle; 20. Power component; 21. Water-cooled heat insulation block; 22. Second displacement sensor; 23. Second baffle; 24. Second marking component; 25. Water-cooled block; 26. Loading platform; 27. Welding fixture assembly; 2701. Second tool holder; 2702. Welding fixture; 2703. Static shoulder welding fixture; 27031. Shoulder surface; 2704. Spindle; 28. Upper bushing assembly; 29. ​​Lower bushing assembly; 30. Assembly hole; 31. Fastening bolt; 32. Filler; 33. Frame; 34. Upper die; 35. Drive component; 36. Lower die; 3601. Die cavity; 37. Positioning slot; 38. Support block; 39. First step; 40. Second step; 41. Blocking component; 701. Mounting cavity; 42. Reset component; 43. Stand; 4301. Base; 4302. Support rod; 4303. Carrier plate; 44. Fixing fixture; 4401. Lower auxiliary mold; 4402. Second cavity; 4403. Second bolt; 45. Movable fixture; 4501. Upper auxiliary mold; 4502. First cavity; 4503. First bolt; 4504. First T-shaped insert; 4505. First T-shaped slot; 46. Pull rod; 47. Upper top plate; 48. Lower pull plate; 49. Tension sensor; 50. Force gauge; 51. Cylinder; 52. Manual pump; 53. Limit bolt one; 54. Mounting hole; c. Negative electrode to be tested; y. Circular end; 55. Copper part; 56. Aluminum part; 57. Base; 58. Tie pin; 59. Connecting block; 60. Slide rail; 61. Support; 62. Fixed block; 63. Moving block; 64. Screw; 65. Pin; 66. Waist-shaped hole; e. Hole part; f. Tear start end; g. Tear end end; h. Tension point. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] A production system for negative electrodes, which employs a processing method for aluminum-copper negative electrodes that differs from existing friction stir welding and machining methods, aims to reduce the manufacturing cost of aluminum-copper negative electrodes and enable their large-scale, economical production. Below, three different embodiments are proposed based on the production concept of this application: Example 1: like Figures 1-2 and Figure 5 As shown, a negative electrode production system is proposed, including a machine base and an actuator. 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. The top of the second carrier 2 can pass through the middle position of the first carrier 1 from bottom to top. When the copper sheet a is heated by friction through the actuator, the actuator is selected as a spot welding tool (preferably a rod-shaped structure) 3. The spot welding tool 3 is located directly above the middle position of the first carrier 1. The spot welding tool 3 is mounted on a first tool holder 13. When the first tool holder 13 rotates and moves up and down, the spot welding tool 3 can move accordingly, that is, the bottom end of the spot welding tool 3 can move towards the middle position of the first carrier 1 in a high-speed rotating state.

[0020] 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.

[0021] 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 3This 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 8 This is used to represent the process. Finally, the first 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] For the sliding installation of the controlled deformation tool 4 on the first carrier 1, a guide rail for the sliding installation of the controlled deformation tool 4 can be fixedly provided on the first carrier 1. 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.

[0027] 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.

[0028] 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 first displacement sensor 7, which is mounted on the second carrier 2. Simultaneously, a first baffle 8 is also provided on the machine tool, located within the working range of the first displacement sensor 7. When the second carrier 2 is driven upwards by the drive source 5, the first displacement sensor 7 moves upwards accordingly. When the first displacement sensor 7 senses the first baffle 8, it stops the second carrier 2 from moving upwards and maintains an upward pushing trend, achieving vertical contact between the aluminum column b and the copper sheet a. In some specific embodiments, the first displacement sensor 7 can be a slotted photoelectric switch. Furthermore, to facilitate the adjustment of the first baffle 8 to the corresponding position, this application provides a first marking element 9 on the machine tool. The first baffle 8 is mounted on the first marking element 9, which has graduations. The first baffle 8 can be adjusted to the corresponding position according to the graduations. The first marking element 9 can be a conventional vernier caliper or a conventional ruler, etc., and this application is not limited to this.

[0029] like Figure 5 As 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.

[0030] Example 2: like Figures 9-12 As shown, a negative electrode production system is proposed, including a machine base. A first carrier 1 is mounted on the machine base to support copper material a, and a second carrier 2 is also mounted on the machine base to support aluminum material b. Preferably, this paper describes an example where the first carrier 1 is positioned above the second carrier 2; therefore, initially, copper material a is positioned above aluminum material b. A drive source (which can be a linear drive component such as a hydraulic cylinder) 5 is also mounted on the machine base. The drive source 5 drives the second carrier 2 upwards until the aluminum material b on the second carrier 2 contacts the copper material a on the first carrier 1. This embodiment also includes an action element that heats the copper sheet a through heat conduction. Preferably, the action element is a heat source 15, which heats the copper material a on the first carrier 1.

[0031] In use, the copper material a is first heated by heat source 15 through heat conduction until the copper material a reaches the specified temperature. Then, the second carrier 2 is driven upward by drive source 5 until the aluminum material b on the second carrier 2 comes into contact with the copper material a. During the heat transfer process from the copper material a to the aluminum material b, the part of the aluminum material b in contact with the copper material a will melt. Since the drive source 5 will always apply an upward pushing force to the second carrier 2, the aluminum material b will be subjected to an upward forging force to ensure its close contact with the copper material a. Then, the heat source 15 is turned off and after cooling for a corresponding time, the hot pressure welding is completed, and the corresponding aluminum-copper negative electrode blank is obtained.

[0032] Furthermore, such as Figure 9 As shown, this application includes a heat source 15 as a transfer block 16. A heating rod 17, which can contact the copper material a, is provided on the transfer block 16. An induction heating coil 18 is sleeved around the heating rod 17. A protective baffle 19 is provided on the transfer block 16 to cover the heating rod 17 and the induction heating coil 18. The transfer block 16 can be driven to move closer to or further away from the first carrier 1, that is, to move the heating rod 17 closer to or further away from the first carrier 1. When it is necessary to heat the copper material a on the first carrier 1, the heating rod 17 can be driven to directly contact the copper material a, conducting heat to the copper material a and achieving heating. At this time, the copper material a is subjected to the downward contact of the heating rod 17, and the aluminum material b is subjected to the upward forging action of the second carrier 2. Under these two forces, the copper material a and the aluminum material b will be well bonded into an aluminum-copper negative electrode blank.

[0033] In order to ensure that the heating rod 17 is driven to move downwards to contact the copper material a for heat transfer only after the heating rod 17 reaches the corresponding temperature, this application also includes a laser thermometer (not shown in the figure) for measuring the temperature of the heating rod 17. The position of the laser thermometer can be arbitrary, and this document does not limit it. For example, the laser thermometer can be set on the protective baffle 19, with its working end facing the heating rod 17 and used to detect the temperature of the heating rod 17. During the up-and-down movement of the heating rod 17, the laser thermometer will also move accordingly to detect the temperature.

[0034] To drive the adapter block 16 to perform the corresponding action, this application provides a power component 20. The power component 20 is directly selected as a tool holder on a welding machine tool that has the characteristic of vertical movement. During assembly, the adapter block 16 can be directly installed on the bottom of the tool holder. Alternatively, the power component 20 can be selected as other linear drive components, such as a cylinder, and the adapter block 16 can be installed on the actuator end of the cylinder.

[0035] Regardless of the type of power component 20 used, in order to prevent the heat from the heating rod 17 from being transferred to the power component 20, this application connects the execution end of the power component 20 and the adapter block 16 through a water-cooled heat insulation block 21. The water-cooled heat insulation block 21 has an inlet and an outlet that are connected to its water-cooled inner cavity. The inlet is connected to a water inlet pipe, and the outlet is connected to a water outlet pipe. Through the continuous inlet and outlet of water, a continuous flow of cooling water can be formed in the water-cooled inner cavity of the water-cooled heat insulation block 21, which continuously cools the water-cooled heat insulation block 21 and achieves heat insulation for the power component 20.

[0036] When copper material a and aluminum material b are in vertical contact, the vertical contact is provided by the heating rod 17 applying downward pressure to copper material a and the second carrier 2 applying upward pressure to aluminum material b. At this time, the portion of the first carrier 1 used to support copper material a is located between the heating rod 17 and the second carrier 2. This portion provides a certain upward support to copper material a, which greatly counteracts the downward contact of the heating rod 17, thus weakening the bonding between copper material a and aluminum material b. To better shape copper material a and aluminum material b under the aforementioned two forces, this application makes the first carrier 1 movable. When copper material a and aluminum material b are in vertical contact, the first carrier 1 can be moved downwards, i.e., moved away from copper material a. This state can be achieved by... Figure 10 To illustrate, in this state, copper material a is only subjected to the downward contact of heating rod 17, and aluminum material b is only subjected to the upward forging action of second carrier 2. The two actions work together at the contact position between the two, making it easier for copper material a and aluminum material b to come into contact and bond, and improving the tightness of contact between copper material a and aluminum material b.

[0037] like Figure 12 As shown, in order to support the copper material a on the first carrier 1, the present application provides a support claw 101 on the first carrier 1. The support claw 101 has a positioning step 102 on its inner side. The support claw 101 is configured as multiple sets and arranged in a circumferential array, so that the positioning step 102 is also multiple sets. The plane where the multiple sets of positioning steps 102 are located together constitutes a positioning area for supporting the copper material a. Figure 12 The diagram shows a case where the support claws 101 are configured in four groups. In this case, the plane in which the four groups of positioning steps 102 are located constitutes the aforementioned positioning area.

[0038] To enable the second carrier 2 to support the aluminum material b, this application provides a limiting groove 201 on the second carrier 2. The limiting groove 201 is used to support the aluminum material b. Figure 8 As shown, based on the shape characteristics of copper material a and aluminum material b (copper material a is sheet-like, aluminum material b is cylindrical or tubular), the second carrier 2 is designed to penetrate the first carrier 1 from bottom to top. The second carrier 2 can drive the aluminum material b to be inserted upward into the annular whole formed by multiple sets of support claws 101, so that the end of the cylindrical or tubular aluminum material b abuts against the side of the sheet-like copper material a. Figure 12 In the state shown, the top of the second carrier 2 penetrates the first carrier 1 from bottom to top to achieve the subsequent contact between the aluminum material b and the copper material a.

[0039] Of course, the shapes shown for the positioning area and limiting groove 201 in this embodiment are merely for adaptation. Figure 8 The shape of the negative electrode post product shown can be adapted to the shape of the positioning area and the limiting groove 201 when the shape characteristics of the copper material a and the aluminum material b are not the above-mentioned sheet, cylindrical or tubular shapes.

[0040] Furthermore, when the copper material a and the aluminum material b are in contact, the end of the aluminum material b will melt, and since the second carrier 2 is always pushed upward by the driving source 5, this application also includes a second displacement sensor 22 disposed on the second carrier 2 and a second baffle 23 disposed beside the second carrier 2. The second baffle 23 is located within the working range of the second displacement sensor 22, and its position is adjustable along the movement direction of the second carrier 2. In use, the position of the second baffle 23 is fixed. When the second carrier 2 is pushed upward by the driving source 5, it can drive the second displacement sensor 22 upward. When the second displacement sensor 22 senses the second baffle 23 during the upward movement, it turns off the induction heating coil 18 and stops heating. The aluminum-copper negative electrode blank formed by hot pressing will gradually cool down. During this cooling process, the driving source 5 will always apply an upward force to the second carrier 2, so that the second carrier 2 always has an upward forging force on the aluminum material b. In some specific embodiments, the second displacement sensor 22 can be selected as a slotted photoelectric switch.

[0041] To facilitate the adjustment of the second stop 23 to the corresponding position, this application provides a second marking element 24 on the machine tool. The second stop 23 is mounted on the second marking element 24, which has a scale. The second stop 23 can be adjusted to the corresponding position according to the scale. The second marking element 24 can be a conventional vernier caliper or a conventional ruler, etc., and this application does not limit it to this.

[0042] In order to rapidly cool down the second carrier 2 after hot-press welding, this application provides a water-cooling block 25 on the outside of the second carrier 2. The water-cooling block 25 has an inlet and an outlet connected to its water-cooling inner cavity. The inlet is connected to a water inlet pipe and the outlet is connected to an outlet pipe. Through the continuous inlet and outlet of water, a continuous flow of cooling water can be formed in the water-cooling inner cavity of the water-cooling block 25, thereby achieving rapid cooling of the second carrier 2.

[0043] Regarding the configuration of the first carrier 1 and the second carrier 2, the first carrier 1 can be configured as a support, and the second carrier 2 can be configured as a cylinder. Furthermore, when the heating rod 17 conducts heat to the copper material a, in order to avoid the dispersion and loss of heat conduction energy, the first carrier 1 can be configured as a ceramic material.

[0044] Example 3: This embodiment is based on the premise that the copper sheet a in the aluminum-copper negative electrode post is not thickened. In use, the production system of this embodiment is used to weld the copper sheet a and the aluminum post b. During the welding process, the production system can also straighten the copper sheet a, which may deform, so that the copper sheet a in the final welded aluminum-copper negative electrode post is flat. Using the production system of this embodiment to weld the negative electrode post not only saves copper material but also effectively suppresses thermal deformation of the copper sheet a, avoiding the need for subsequent additional straightening machining steps, simplifying the production process, saving production time, and improving production efficiency. The production system of this embodiment is described below: like Figures 13-16 As shown, a negative electrode post production system includes an actuating component and a carrying platform 26 arranged vertically. The carrying platform 26 is used to place the copper sheet a and aluminum post b to be welded. The actuating component is located above the carrying platform 26 and can move downward toward the carrying platform 26. When the copper sheet a and aluminum post b to be welded are placed on the carrying platform 26, Figure 16 The diagram shows a copper sheet a above and an aluminum column b below. This allows the actuator to be driven to move downwards toward the platform 26 until the welding fixture 2702 in the actuator contacts the copper sheet a above, thus achieving welding. Simultaneously, during this welding process, the coordinated movement of the actuator and the platform 26 allows for static pressure straightening of the deformed copper sheet a.

[0045] The platform 26 includes a first carrier 1 and a second carrier 2. The first carrier 1 has holes arranged vertically. The top of the second carrier 2 is movably inserted into the holes, and the top and holes together form a storage area for placing the aluminum column b. A groove for placing the copper sheet a is provided at the top of the holes. Under the upward driving action of the drive source (cylinder, etc.) 5, the second carrier 2 can push the aluminum column b upward, causing it to contact the copper sheet a vertically. This contact state can be... Figure 16 To represent it.

[0046] like Figures 17-18As shown, the actuating element is configured as a welding fixture assembly 27, which includes a spindle 2704. A second tool holder 2701 is mounted on the spindle 2704, and a welding fixture 2702 is fixedly mounted at the bottom of the second tool holder 2701. Therefore, the up-and-down movement and rotation of the spindle 2704 can drive the welding fixture 2702 to move accordingly. Furthermore, the welding fixture assembly 27 also includes a stationary shoulder welding fixture 2703. The stationary shoulder welding fixture 2703 is rotatably mounted on the spindle 2704 via an adapter, and is sleeved outside the welding fixture 2702. When the spindle 2704 drives the welding fixture 2702 to rotate at high speed, the stationary shoulder welding fixture 2703 does not move and remains stationary. When the spindle 2704 drives the welding fixture 2702 to move up and down, the stationary shoulder welding fixture 2703 moves up and down accordingly.

[0047] For example Figures 17-18 As shown, the adapter includes a sleeve 28 that is rotatably mounted on the outside of the spindle 2704. The sleeve 28 is coaxial with the spindle 2704. A lower sleeve 29 is fixedly mounted on the bottom of the sleeve 28 and is sleeved on the outside of the second tool holder 2701. The lower sleeve 29 is used for the fixed mounting of the stationary shoulder welding tool 2703.

[0048] Furthermore, the bottom end face of the welding fixture 2702 extends out of the inner cavity of the stationary shoulder welding fixture 2703, and the bottom end face of the welding fixture 2702 is located below the shoulder surface 27031 of the stationary shoulder welding fixture 2703. This state can be achieved by... Figure 19 The distance between the bottom surface of the welding fixture 2702 and the shoulder surface 27031 of the stationary shoulder welding fixture 2703 can be represented by d. By setting the value of d to be adjustable, it can adapt to the processing of copper sheets a of different thicknesses. Since the welding process requirements of copper sheets a of different thicknesses are different, when a certain welding process requires a large amount of heat and a large depth, the value of d can be adjusted to match the current welding process.

[0049] Meanwhile, d is between 0.1mm and 0.7mm, with a preferred value of 0.3mm. Under normal circumstances, the more the welding fixture 2702 protrudes downwards, the more pressure is distributed on the welding fixture 2702, and the greater the frictional heat generation.

[0050] like Figure 16As shown, before welding, the bottom surface of the welding fixture 2702 is located below the shoulder surface 27031 of the stationary shoulder welding fixture 2703. Then, the high-speed rotating spindle 2704 moves downward, which drives the welding fixture 2702 and the stationary shoulder welding fixture 2703 to move downward synchronously until the bottom surface of the welding fixture 2702 first contacts the copper sheet a below. The high-speed rotation of the welding fixture 2702 can heat up the copper sheet a and soften the contact part between the copper sheet a and the welding fixture 2702, keeping the spindle 2704 stable. As the aluminum column b is pushed upward by the second carrier 2 below, the downward trend of the main shaft 2704 and the upward pushing action of the second carrier 2 will cause the bottom end of the welding tool 2702 to penetrate into the copper sheet a to a certain depth until the shoulder surface 27031 of the stationary shoulder welding tool 2703 touches the copper sheet a. The shoulder surface 27031 will apply a uniform downward pressure to the copper sheet a. This downward pressure can apply a uniform downward pressure to the copper sheet a, effectively suppressing the thermal deformation of the copper sheet a. Meanwhile, the heat from copper sheet a is conducted to the aluminum column b below, causing melting at the contact point between aluminum column b and copper sheet a. Under the continuous upward pushing action of the second carrier 2, the length of aluminum column b gradually decreases. When it reaches a specified length (the type of negative terminal corresponding to this specified length is pre-designed; specifically, it can be aligned with the corresponding positioning component by the upward movement of a certain part of the second carrier 2 to trigger the positioning signal), the spindle 2704 stops rotating, but continues to maintain its position. The downward trend of 04 and the upward pushing action of the second carrier 2, maintaining this action for a certain period of time (between 0.5s and 10s, preferably 5s), cause the molten aluminum between the copper sheet a and the aluminum column b to cool and solidify due to continuous cooling. This allows the aluminum column b and the copper sheet a to be welded into a negative electrode blank. At this time, the main shaft 2704 moves upward, causing the welding tool 2702 and the stationary shoulder welding tool 2703 to detach from the surface of the negative electrode blank, thus completing the welding. The negative electrode blank after welding can then be... Figure 8 To represent it.

[0051] like Figure 21 As shown, for the assembly of the welding tool 2702 on the second tool holder 2701, the welding tool 2702 can be configured to include a stepped insertion part 27021 and a working part 27022. The insertion part 27021 and the working part 27022 are coaxially arranged, and the diameter of the insertion part 27021 is smaller than the diameter of the working part 27022. During installation, the insertion part 27021 is inserted into the inner cavity of the second tool holder 2701, and the top end of the working part 27022 is in contact with the bottom end of the second tool holder 2701. Subsequently, the insertion part 27021 is locked on the second tool holder 2701, thereby realizing the installation of the welding tool 2702 on the bottom end of the second tool holder 2701.

[0052] For locking the position of the insertion part 27021 on the second tool holder 2701, any locking technique in the prior art can be used. This application proposes a locking method, as follows: (1) such as Figure 20 As shown, a mounting hole 30 extending into the inner cavity is provided on the side of the second tool holder 2701, such as... Figure 21 As shown, the side of the insertion part 27021 is provided with a plane arranged along its length direction, so that when the insertion part 27021 at the top of the welding tool 2702 is inserted into the inner cavity of the second tool holder 2701, the mounting hole 30 allows the set screw to be screwed in and abut against the plane of the side of the insertion part 27021, thereby realizing the side locking of the insertion part 27021.

[0053] (2) such as Figure 18 As shown, a fastening bolt 31 that can extend into the inner cavity is provided at the top of the second tool holder 2701, so that when the insertion part 27021 at the top of the welding tool 2702 is inserted into the inner cavity of the second tool holder 2701, the fastening bolt 31 can abut against the top of the insertion part 27021, thereby achieving top locking of the insertion part 27021.

[0054] When the top end of the aforementioned working part 27022 abuts against the bottom end of the second tool holder 2701, the two end faces together form a positioning end face. In summary, with the positioning end face present, combined with the aforementioned side locking and top locking functions, the connection strength of the welding tool 2702 on the second tool holder 2701 can be improved, ensuring assembly stability.

[0055] like Figure 19 As shown, to achieve adjustable distance between the bottom surface of the welding tool 2702 and the shoulder surface 27031 of the stationary shoulder welding tool 2703, conventional techniques in the prior art can be used, such as changing the insertion depth of the welding tool 2702 on the second tool holder 2701, or setting the welding tool 2702 as telescopic, etc. Based on the aforementioned welding tool 2702 being configured as an insertion part 27021 and a working part 27022, this application proposes the following adjustment method: a filler 32 can be provided between the top end of the working part 27022 and the bottom end of the second tool holder 2701. The thickness of the filler 32 can be varied according to actual conditions, thereby achieving adjustment of the distance between the bottom surface of the welding tool 2702 and the shoulder surface 27031 of the stationary shoulder welding tool 2703 at different thicknesses.

[0056] Preferably, the filler 32 is configured as multiple sets of shims of different thicknesses. One of these shims can be selectively placed between the top of the working part 27022 and the bottom of the second tool holder 2701. The presence of shims of different thicknesses changes the distance between the top of the working part 27022 and the bottom of the second tool holder 2701, thereby changing the length of the bottom end of the welding fixture 2702 extending out of the inner cavity of the stationary shoulder welding fixture 2703. This allows for adjustment of the distance between the bottom surface of the welding fixture 2702 and the shoulder surface 27031 of the stationary shoulder welding fixture 2703. Of course, in actual use, the multiple sets of shims can be used in various ways, such as simultaneously placing two sets of shims of different thicknesses between the top of the working part 27022 and the bottom of the second tool holder 2701, as long as the corresponding adjustment requirements are met.

[0057] Example 4: After processing the aluminum-copper negative electrode post using any of the above embodiments, an aluminum-copper negative electrode post blank is formed. To perform a shaping process on this blank, such as... Figures 22-24 As shown, this application proposes a negative electrode post stamping and straightening composite mechanism, including a frame 33. An upper die 34 is movably disposed on the upper section of the frame 33 along the vertical direction, and a driving component (e.g., a pneumatic-hydraulic booster cylinder) 35 is disposed on the upper section. The actuator end of the driving component 35 is connected to the upper die 34, so that when the driving component 35 is working, it can drive the upper die 34 to reciprocate vertically. A lower die 36 is fixedly disposed on the lower section of the frame 33, located below the upper die 34. The upper die 34 can move to the top of the lower die 36 under the driving force of the driving component 35 to achieve die closing. Preferably, both the upper die 34 and the lower die 36 are made of steel.

[0058] A cavity 3601 is provided in the middle of the lower mold 36 along the vertical direction. A positioning element is provided at the top of the cavity 3601. The positioning element is used to position the negative electrode post at a designated position in the cavity 3601, so that the negative electrode post can be accurately processed on the cavity 3601 when the upper mold 34 and the lower mold 36 perform the mold closing action.

[0059] like Figures 26-27 As shown, specifically, the positioning components include a positioning slot 37 opened at the top port of the mold cavity 3601 and a support block 38 movably disposed inside the mold cavity 3601. The structural schematic diagram of the negative electrode post can be obtained from... Figure 8 This indicates that when the negative electrode post is placed at the top port of the mold cavity 3601, the positioning slot 37 is used to accommodate the limiting copper piece a, and the support block 38 is used to support the aluminum post b, thus achieving the pre-positioning of the negative electrode post. This state can be achieved by... Figure 25To further illustrate this, in order to ensure that the negative terminal can smoothly enter the top port of the mold cavity 3601, the positioning slot 37 is designed as an inverted cone shape. During the process of placing the negative terminal into the positioning slot 37, the copper piece a of the negative terminal can be directly guided into the positioning slot 37 by utilizing its inverted cone-shaped guide inner side. This inverted cone design of the positioning slot 37, to a certain extent, enables the operator to blindly place the negative terminal into the positioning slot 37.

[0060] Of course, when this application uses automated components such as robotic arms to replace the aforementioned manual labor, due to the high precision and accuracy of the robotic arm's material feeding, it is not necessary to set the positioning slot 37 as an inverted cone shape as a whole.

[0061] The inner wall of the mold cavity 3601 is provided with a first step 39 and a second step 40 arranged vertically from top to bottom. A step is defined as a significant height difference between two adjacent and parallel surfaces on the same part (the side of the difference is usually vertical or nearly vertical). A step structure typically consists of a horizontal surface (tread surface), a vertical surface (elevation surface), and the edge where the two surfaces intersect. To illustrate in detail the distribution of the components of the first step 39 within the mold cavity 3601, [further details are provided]. Figure 29 For illustration purposes, the horizontal plane of the first step 39 can be represented by 3901, the vertical plane of the first step 39 can be represented by 3902, and the edge where the horizontal plane and the vertical plane intersect can be represented by 3903.

[0062] Based on the above explanation and illustration of the steps, the positional relationship between the first step 39 and the second step 40 is as follows: the bottom end of the vertical surface 3902 of the first step 39 is seamlessly connected to the outer edge of the horizontal surface of the second step 40. In this arrangement, the two together form a stepped hole structure. This arrangement can be achieved by... Figure 27 and Figure 28 This is used to represent the hole. At this time, the hole enclosed by the vertical surface 3902 of the first step 39 is the punching hole, and the shape of the bottom end face of the upper die 34 is also set to match the shape and size of the punching hole. Preferably, the overall shape of the upper die 34 can be set to match the shape and size of the punching hole.

[0063] For example Figures 26-27 As shown, the first step 39 is located at the top of the mold cavity 3601 and at the bottom of the positioning slot 37. When the negative electrode post is placed on the top of the mold cavity 3601 through the positioning member, the copper sheet a of the negative electrode post is supported by the positioning slot 37, and the aluminum post b of the negative electrode post is supported by the support block 38 through the aforementioned stepped hole structure from top to bottom. This state can be achieved by... Figure 25 To represent it.

[0064] During processing, with Figure 25Taking the illustrated state as an example, the upper die 34 is first driven downwards until the lower die 36 contacts the copper sheet a of the negative terminal post; then the upper die 34 continues to be driven downwards, and the support block 38 supports the aluminum column b, which then moves downwards a specified distance until the bottom surface of the copper sheet a contacts the horizontal surface 3901 of the first step 39. Then the upper die 34 is driven downwards again, which will cause the copper sheet a to be punched, completing the cutting process of the copper sheet a. Since the overall shape of the upper die 34 is adapted to the shape and size of the punching hole formed by the first step 39, this punching can be regarded as: the bottom edge of the upper die 34 and the edge 3903 of the first step 39 will generate a shearing action during the downward process. This shearing action can be used to cut off the excess part of the copper sheet a, so that the shape and size of the copper sheet a are consistent with the punching hole.

[0065] After the blanking is completed, the copper sheet a of the negative electrode post will be completely inside the blanking hole. Then, the upper die 34 continues to drive the copper sheet a downward, that is, the copper sheet a will move downward along the vertical plane 3902 of the first step 39. The support block 38 supports the aluminum column b and moves downward accordingly. During this downward movement, since the lower die 36 is provided with a blocking member 41, when the support block 38 moves downward into the stopping range of the blocking member 41, it will be stopped. At this time, the copper sheet a of the negative electrode post is subjected to the downward action of the upper die 34, and the aluminum column b of the negative electrode post is subjected to the upward stopping action of the support block 38. In this state, the upper die 34 continues to be driven downward until the bottom end face of the copper sheet a contacts the horizontal plane of the second step 40, which will cause the aluminum column b to be pressed and trimmed, completing the pressing process of the aluminum column b.

[0066] After the pressing is completed, the upper die 34 continues to move downward / maintain a downward trend for a period of time. Since the bottom surface of the copper sheet a is in contact with the horizontal surface of the second step 40 at this time, this downward movement / trend will perform a shaping process on the copper sheet a. Then, the downward movement / trend of the upper die 34 is released and it is reset upward, thus completing the cutting, pressing, and shaping process of the negative electrode post.

[0067] Regarding the aforementioned blocking member 41, the blocking member 41 includes a seat fixedly installed at the lower mold 36. The seat is located within the movement range path of the support block 38. When the support block 38 moves downward to a designated position within the mold cavity 3601, the seat can stop the support block 38 that has moved to that position to accommodate subsequent pressing and straightening processes.

[0068] Preferably, when the mold cavity 3601 is a through hole and the support block 38 is stopped at the bottom end face of the lower mold 36, the seat can be directly installed on the bottom end face of the lower mold 36. When the support block 38 moves down to the designated position, it can be stopped by the top surface of the seat.

[0069] Furthermore, to enable the support block 38 to be movably installed within the mold cavity 3601, a mounting cavity 701 is provided on the base along the length of the mold cavity 3601, and the mounting cavity 701 is coaxially arranged with the mold cavity 3601. A reset member (such as a reset spring) 42 is provided within the mounting cavity 701, with one end extending into the mold cavity 3601, and this end is used for mounting the support block 38. Before processing, the reset member 42 is used to lift the support block 38 upwards to a designated position within the mold cavity 3601. This state can be achieved by... Figure 26 To illustrate, when the negative electrode post is placed at the top port of the mold cavity 3601, the support block 38 will support the aluminum pillar b of the negative electrode post. This support state can be determined by... Figure 25 This is illustrated below. During the downward movement of the negative electrode post driven by the upper die 34, the reset component 42 can be compressed along with the downward movement of the support block 38 until the support block 38 contacts the base, indicating it is fully compressed. After subsequent punching, upsetting, and straightening processes, the upper die 34 moves upward to reset. Using the compressive potential energy of the reset component 42, the negative electrode post can be pushed upward to its initial placement position for easy retrieval by workers.

[0070] Example 5: Under the three aforementioned production and processing concepts but with different implementation methods, the aluminum-copper negative electrode post will undergo adaptive production and processing. However, based on the produced and shaped aluminum-copper negative electrode post, this application also performs relevant tensile and / or tear tests on it, as detailed below: Tensile test: like Figures 30-31 As shown, a tensile testing fixture is proposed, including a frame 43. The frame 43 includes a base 4301, two support rods 4302, and a carrier plate 4303. The two support rods 4302 are arranged in parallel on the top of the base 4301, and the carrier plate 4303 is fixedly installed on the top of the two support rods 4302. A fixed clamp 44 is provided on the base 4301, which is used to clamp and limit one end of the negative electrode post c to be tested. A movable clamp 45 is provided on the carrier plate 4303, which is used to clamp and limit the other end of the negative electrode post c to be tested. The movable clamp 45 can move away from the fixed clamp 44. Taking the fixed clamp 44 and the movable clamp 45 as being in the vertical direction at the same time, with the movable clamp 45 located above, the movable clamp 45 can move away from the fixed clamp 44 in the vertical upward direction. This movement is used to achieve the tensile test of the negative electrode post c to be tested.

[0071] For the installation of the fixing clamp 44 on the base 4301, the fixing clamp 44 can be directly welded or threaded onto the base 4301.

[0072] For the installation of the movable clamp 45 on the carrier plate 4303, in order to meet the requirements of simple driving and data recording for tensile testing, this application has the following design: (1) Two pull rods 46 are movably installed on the carrier plate 4303. The top and bottom ends of the pull rods 46 penetrate the carrier plate 4303. The pull rods 46 can move along the stretching direction of the negative electrode post c to be tested. The top and bottom ends of the pull rods 46 are respectively provided with an upper plate 47 and a lower plate 48.

[0073] (2) A tension sensor 49 is fixedly installed at the bottom of the pull-down plate 48. The tension sensor 49 is preferably a column-type tension sensor with two internal threaded connection ends, such as... Figure 30 As shown, the upper internal threaded connection end is fixedly connected to the pull-down plate 48, and the lower internal threaded connection end is fixedly connected to the movable clamp 45; the tension sensor 49 is electrically connected to a force gauge (preferably handheld) 50.

[0074] (3) A cylinder body (e.g., a hydraulic cylinder with an inner cavity) 51 is fixedly installed on the carrier plate 4303, and the actuating end of the cylinder body 51 is arranged upward, and the actuating end of the cylinder body 51 is fixedly connected to the upper top plate 47; a manual pump 52 is connected to the inner cavity of the cylinder body 51.

[0075] Under the above design, the method of use of this application is as follows: the upper and lower ends of the negative electrode post c to be tested are clamped and limited in advance by the movable clamp 45 and the fixed clamp 44 respectively. Then, the manual pump 52 is operated so that the actuator end of the cylinder 51 makes an upward extension movement. This movement will drive the upper top plate 47, the pull rod 46, the lower pull plate 48, the tension sensor 49 and the movable clamp 45 to have an upward movement tendency, that is, to form an upward stretching movement of the negative electrode post c to be tested. During this stretching process, the reading on the force gauge 50 can be observed at all times. The force gauge 50 will record the force curve and data of the entire stretching process. When the negative electrode post c to be tested breaks, its tensile performance data can be obtained through the force gauge 50.

[0076] Because the negative electrode c product to be tested in this application is Figure 34 The structure shown is composed of Figure 8 The negative terminal shown consists of a negative terminal and a circular end y. The negative terminal is composed of a copper sheet a and an aluminum column b. Therefore, the difference between this embodiment and the previous embodiment is that the fixed clamp 44 and the movable clamp 45 in the previous embodiment are adapted to fit the design so that they can be used for... Figure 34 The negative electrode post c of the product shown has a good clamping and limiting effect. For example... Figures 32-33 As shown, the specific design is as follows: (1) Movable clamp 45: includes two sets of detachably connected upper sub-molds 4501. Any one of the upper sub-molds 4501 is connected to one end of the tension sensor 49. The bottom of the upper sub-mold 4501 is provided with a first groove 4502. The two first grooves 4502 together form an upper contour cavity. The upper contour cavity is used to clamp and limit the circular end y of the negative electrode post c to be tested.

[0077] (2) Fixture 44: includes two sets of detachably connected lower sub-molds 4401. Any one of the lower sub-molds 4401 is connected to the base 4301. The top of the lower sub-mold 4401 is provided with a second cavity 4402. The two second cavities 4402 together form a lower contour cavity. The lower contour cavity is used to clamp and limit the copper sheet a of the negative electrode post c to be tested.

[0078] like Figure 32 As shown, the detachable connection of the two upper sub-molds 4501 can be configured in any of the prior art methods, such as snap-fit, fastening, threaded connection, etc. This paper proposes the following insertion method: Each of the two upper sub-molds 4501 has a first T-shaped insert 4504 and a first T-shaped slot 4505. The first T-shaped insert 4504 and the first T-shaped slot 4505 are in a mating insertion relationship, so that when the two upper sub-molds 4501 are inserted into each other by the first T-shaped insert 4504 and the first T-shaped slot 4505, the two first cavities 4502 enclose an upper contour cavity. To ensure the stability of the upper contour cavity, the two upper sub-molds 4501 can also be locked by a first bolt 4503. Preferably, the locking direction of the first bolt 4503 is perpendicular to the sliding insertion direction of the two upper sub-molds 4501.

[0079] like Figure 33 As shown, the detachable connection of the two lower sub-molds 4401 can be configured in any of the prior art methods, such as snap-fit, fastening, threaded connection, etc. This paper proposes the following insertion method: Each of the two lower sub-molds 4401 has a second T-shaped insert 4404 and a second T-shaped slot 4405, and the second T-shaped insert 4404 and the second T-shaped slot 4405 are fitted together for insertion. After the two lower sub-molds 4401 are inserted into the second T-shaped insert 4404 and the second T-shaped slot 4405 and locked by the second bolt 4403, the two second cavities 4402 enclose the lower contour cavity. To ensure the stability of the lower contour cavity, the two lower sub-molds 4401 can also be locked by the second bolt 4403. Preferably, the locking direction of the second bolt 4403 is perpendicular to the sliding insertion direction of the two lower sub-molds 4401.

[0080] It should be noted that both the first bolt 4503 and the second bolt 4403 can be replaced with conventional pins, dowels, etc.

[0081] To further improve the convenience of this tooling, this embodiment adds a first limiting bolt 53 and a second limiting bolt (not shown in the figure) to the above embodiment.

[0082] Specifically, based on the relationship between the two upper sub-molds 4501, the upper sub-mold 4501 connected to the tension sensor 49 is defined as the restricted upper sub-mold, and the other upper sub-mold 4501 is defined as the free upper sub-mold. The restricted upper sub-mold 4501 has a mounting hole 54, and a limiting bolt 53 is detachably mounted on the mounting hole 54. When the free upper sub-mold is slidably inserted into the restricted upper sub-mold, the limiting bolt 53 can be inserted into the mounting hole 54. At this time, the head of the limiting bolt 53 (which may be fitted with a washer) will be located within the sliding path range of the free upper sub-mold. This head can block the free upper sub-mold and prevent it from sliding out of the restricted upper sub-mold.

[0083] By utilizing the limiting bolt 53, even after releasing the locking of the free-state upper sub-mold to the restricted-state upper sub-mold by the first bolt 4503, the free-state upper sub-mold will still be inserted into the restricted-state upper sub-mold. At this point, the free-state upper sub-mold can slide left and right on the restricted-state upper sub-mold without falling off. When a tensile test is required in this state, the copper sheet a of the negative electrode c to be tested can be directly placed in the first cavity 4502 within the restricted-state upper sub-mold. Then, the free-state upper sub-mold is driven closer to the restricted-state upper sub-mold, causing the two first cavities 4502 to close and form an upper contour cavity, thus accommodating and limiting the copper sheet a. This avoids the need to slide and insert the free-state upper sub-mold onto the restricted-state upper sub-mold when it is not on the restricted-state upper sub-mold, saving testing time and improving the ease of use of this fixture.

[0084] The second limiting bolt acts on the fixing clamp 44, and is intended to prevent the other lower sub-mold 4401, which is slidably inserted into the lower sub-mold 4401 connected to the base 4301, from sliding out. The working mechanism of the second limiting bolt is the same as that of the first limiting bolt 53. To avoid cumbersome writing, it will not be repeated here.

[0085] Tear test: In some embodiments, the structure of the aluminum-copper negative electrode post is not limited to... Figure 8 As shown, its structure can also be made of Figure 35 As shown, in this structure, the aluminum-copper negative electrode post consists of a copper portion at the top and an aluminum portion at the bottom. Its structural schematic can be obtained from... Figure 35 Let 55 represent the copper portion, 56 represent the aluminum portion, and e represent the hole located on the copper portion. When performing a tear test on this aluminum-copper negative electrode post, the tear path is arranged along the length of the contact surface between the copper and aluminum portions. Taking the aluminum portion being fixed in position and the copper portion subjected to tensile tearing as an example, one type of tear path can be... Figure 35The arrows in the diagram represent the tear. The beginning of the tear can be represented by f, and the end of the tear can be represented by g. Under this tear path, the tension point can be represented by h. During the tearing process, it is necessary to always keep the current tear point and the tension point in a centered relationship.

[0086] like Figures 36-37 As shown, a tear test fixture for a negative electrode post is proposed, including a base 57 and a clamp slidably disposed on the base 57. The clamp is used to hold and fix the copper part 55 or the aluminum part 56 of the aluminum-copper negative electrode post to be tested. It should be noted that the position of the aluminum-copper negative electrode post on the clamp must ensure that its tear path is arranged along the sliding direction of the clamp. Then, the aluminum part 56 or the copper part 55 is clamped using an external clamping component. At this time, both the copper part 55 and the aluminum part 56 of the aluminum-copper negative electrode post are in a clamped and limited state, and subsequent tear testing can be performed. There are three test methods for tear testing: (1) Fix the position of the clamp and make the clamping parts tear; (2) Fix the position of the clamping component and make the clamp tear; (3) Make the clamp and the clamping parts perform synchronous tearing actions in opposite directions.

[0087] Taking the third test method as an example, the aluminum part 56 of the aluminum-copper negative electrode post is clamped and limited by a fixture, and the copper part 55 is clamped and limited by a clamping component. Since the copper part 55 has a hole e, a pull pin 58 is provided. The pull pin 58 passes through the hole e from bottom to top, and the clamping component clamps and fixes the pull pin 58, thus achieving the clamping and limiting of the copper part 55. At this time, the pull pin 58 is located at the tearing start point f, and the pull pin 58 and the tearing start point f are centered. Then, the fixture and the clamping component are driven to move towards each other synchronously, so that the tearing action can be performed from the tearing start point f. Since the fixture is slidably set on the base 57, during the tearing process, the tearing point will move towards the straight line position of the tension of the clamping component, always maintaining the tearing point and the tension in a centered layout relationship. This position compensation setting effectively ensures the accuracy of the test results.

[0088] by Figure 36 As shown, the clamp slides horizontally on the base 57, and the clamping component applies a vertical upward pulling force to the pull stud 58. During the tearing process, the tearing path between the copper part 55 and the aluminum part 56 is from left to right. Since the vertical position of the pulling force on the pull stud 58 remains unchanged, the clamp will move from right to left in a positional compensation manner, so that the tearing point is always located in the direction of the pulling force line, ensuring that the tearing point and the pulling force direction are strictly aligned.

[0089] It should be noted that the clamping components can be existing tensile testing equipment, universal tensile testing machines, etc., and the components used to apply the tearing action to the fixture can also be tensile testing equipment, universal tensile testing machines, etc. When a universal tensile testing machine is selected, the two clamps of the universal tensile testing machine can be directly clamped and fixed to the fixture and the pull stud 58 respectively for tear testing.

[0090] To facilitate clamping and fixing of the fixture by the clamps, this application provides a connecting block 59 on the fixture for clamping by the clamps. Preferably, the connecting block 59 is centered on the position of the pull stud 58 on the fixture. Figure 36 As shown, the rivet 58, the tear start point f, and the connecting block 59 are arranged along the same vertical direction and are centered. During the subsequent tear test, the tear point will dynamically compensate and move to the line connecting the rivet 58 and the connecting block 59, so that the three will always maintain a centered layout.

[0091] Regarding the sliding arrangement of the clamp on the base 57, a slide rail 60 can be provided on the base 57, and the clamp is slidably mounted on the slide rail 60. It should be noted that the function of the slide rail 60 is to provide positional compensation for the clamp along the tear path direction, ensuring that the tear point is always located between the rivet 58 and the connecting block 59. Therefore, the positional layout of the slide rail 60 can be varied, as long as it provides sufficient displacement for the clamp to move along the tear path direction. Figure 36 As shown, preferably, the sliding direction of the clamp on the slide rail 60 is set to be parallel to the tear path direction. In this horizontal layout, the slide rail 60 can provide the clamp with maximum position compensation.

[0092] The clamp described above includes a support 61 and two clamping blocks mounted on the support 61. The support 61 is slidably mounted on a slide rail 60. The support 61 has a U-shaped layout. The two clamping blocks are arranged opposite each other and are respectively located on two adjacent sides of the support 61. One clamping block is defined as a fixed block 62, and the other is a movable block 63. The fixed block 62 is fixedly mounted on the support 61, and the movable block 63 is slidably mounted on the support 61. The movable block 63 can move towards or away from the fixed block 62 to form an adjustable clamping area between the movable block 63 and the fixed block 62. This clamping area is used to clamp and fix the copper part 55 or aluminum part 56 of the negative electrode post. Meanwhile, a screw 64 is also provided on the support 61. When the clamping area contacts the copper part 55 or aluminum part 56 of the negative terminal post, the screw 64 is driven to tighten, applying a contacting action to the moving block 63, thereby achieving the clamping and fixing of the copper part 55 or aluminum part 56 of the negative terminal post by the clamping area. Figure 36 As shown, preferably, the screw 64 is horizontally positioned on the side of the support 61.

[0093] For the sliding arrangement of the moving block 63 on the support 61, a pin 65 can be provided on the support 61, and an oblong hole 66 is provided on the moving block 63. The length direction of the oblong hole 66 is perpendicular to the length direction (clamping surface direction) of the fixed block 62. The moving block 63 is sleeved on the outside of the pin 65 by means of the oblong hole 66, and the layout of the oblong hole 66 enables the moving block 63 to move closer to or away from the fixed block 62.

[0094] Furthermore, since the screw 64 limits the position of the moving block 63 horizontally, in order to maintain the stable clamping state of the moving block 63 on the support 61 during the tearing process, this application also includes a bolt for vertically limiting the moving block 63. After the moving block 63 is horizontally pressed against the screw 64, the threaded section of the bolt is passed through the moving block 63 from top to bottom and threaded onto the support 61 until the head of the bolt locks the moving block 63 against the screw, ensuring the vertical stability of the moving block 63 in the clamping state.

[0095] In order to save costs and refine the structure, this application uses the pin 65 and the bolt as one. That is, the pin 65 serves as a carrier for the oblong hole 66 to be fitted, and can also lock the moving block 63 vertically after the screw 64 makes horizontal contact with the moving block 63.

[0096] In order to ensure that the clamping area can effectively clamp and fix the copper part 55 or aluminum part 56 of the negative terminal post, this application can make the adjacent sides of the fixed block 62 and the moving block 63 have a toothed knurled design, or friction plates can be provided on the adjacent sides of the fixed block 62 and the moving block 63.

[0097] In one specific embodiment, the clamping region clamps the aluminum portion 56 of the negative electrode post, for example... Figure 36 The image shows the clamping area clamping the aluminum portion 56 of the negative electrode post.

[0098] It should be noted that this application is based on Figure 35 The test will be conducted using the aluminum-copper negative electrode post structure shown as an example. When it is necessary to... Figure 8 When testing the aluminum-copper negative electrode post with the structure shown, the fixtures and other components of the testing tooling can be adapted for use. Alternatively, when it is necessary to produce, straighten, and test aluminum-copper negative electrode posts with other structures, each device in this application can be adapted and improved.

[0099] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. A production system of a negative pole post, characterized by, 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 active component is used to heat the copper sheet (a); 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 to form a negative electrode blank. A stamping and straightening composite mechanism is used to stamp and straighten the formed negative electrode column blank. Tensile testing fixtures and / or tear testing fixtures are used to test the shaped negative electrode blank. The system also includes a first displacement sensor (7) disposed on the second carrier (2) and a first baffle (8) disposed on the side of the second carrier (2). The first baffle (8) is located within the working range of the first displacement sensor (7) and its position is adjustable along the movement direction of the second carrier (2). A first identification piece (9) is provided on the side of the second carrier (2) for the first baffle (8) to be movably installed. 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.

2. The negative post production system of claim 1, wherein The active element heats the copper sheet (a) through frictional heating or heat conduction.

3. The negative post production system of claim 2, wherein When the copper sheet (a) is heated by frictional heating, the active part is selected as a spot welding tool (3) with a rod-shaped structure. The system also includes a deformation control tool (4), which is set into two sets and used to contact the top surfaces of the two ends of the copper sheet (a) respectively. 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 negative post production system of claim 3, wherein Both sets of deformation control fixtures (4) are provided with contour grooves (401) on the side near the spot welding tool (3) to adapt to the shape of the spot welding tool (3). 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.

5. The negative post production system of claim 2, wherein When the copper sheet (a) is heated by frictional heating, the active component is selected as a welding tool assembly (27). The welding tool assembly (27) includes a first tool holder (2701) that can move vertically, a welding tool (2702) fixed at the bottom of the first tool holder (2701), and a stationary shoulder welding tool (2703) coaxially sleeved outside the welding tool (2702). The bottom end of the welding tool (2702) extends downward and protrudes out of the stationary shoulder welding tool (2703) so that the shoulder surface (27031) of the stationary shoulder welding tool (2703) applies static pressure to the copper sheet (a).

6. The negative post production system of claim 2, wherein When the copper sheet (a) is heated by heat conduction, the active component is selected as a heat source (15). The heat source (15) includes a transfer block (16) that can move toward or away from the copper sheet (a). The transfer block (16) is provided with a heating rod (17) that can come into contact with the copper sheet (a). An induction heating coil (18) is sleeved around the heating rod (17). The transfer block (16) is provided with a protective baffle (19) for covering the heating rod (17) and the induction heating coil (18).

7. The negative post production system of claim 1, wherein The stamping and straightening composite mechanism includes an upper die (34) and a lower die (36) that can perform similar or disjoint movements. The lower die (36) has a mold cavity (3601), and the mold cavity (3601) is provided with a positioning element for positioning the negative electrode post. The inner wall of the mold cavity (3601) is provided with a first step (39), and the shape of the punching hole enclosed by the vertical surface (3902) of the first step (39) is adapted to the shape and size of the bottom end face of the upper mold (34), so that when the upper mold (34) moves toward the lower mold (36), the bottom edge of the upper mold (34) and the edge (3903) of the first step (39) together apply a shearing action to the copper sheet (a) of the negative terminal post. The inner wall of the mold cavity (3601) is also provided with a second step (40) located below the first step (39), and the two together form a stepped hole structure.

8. The negative electrode post production system according to claim 7, characterized in that, The positioning component includes a positioning slot (37) opened at the port of the mold cavity (3601) and a support block (38) movably disposed inside the mold cavity (3601). The positioning slot (37) is used to accommodate the limiting copper sheet (a), and the support block (38) is used to support the aluminum column (b). The positioning slot (37) is designed as an inverted cone.

9. A negative electrode post production system according to claim 8, characterized in that, The lower mold (36) is provided with a blocking member (41) for stopping the position of the support block (38), so that when the copper sheet (a) moves along the vertical plane (3902) of the first step (39), the blocking member (41) stops the support block (38); The blocking member (41) includes a base, which is fixedly installed on the lower mold (36) and located within the movement range path of the support block (38); The base has an installation cavity (701) along the length of the mold cavity (3601), and the installation cavity (701) is coaxially arranged with the mold cavity (3601). A reset member (42) is provided in the installation cavity (701) with one end extending into the mold cavity (3601), and this end is used for the support block (38) to be installed.

10. A negative electrode post production system according to claim 1, characterized in that, The tensile testing fixture includes a frame (43), a fixed clamp (44) and a movable clamp (45) mounted on the frame (43). The fixed clamp (44) and the movable clamp (45) are used to clamp and limit the two ends of the negative electrode post (c) to be tested, so that when the movable clamp (45) moves away from the fixed clamp (44), the negative electrode post (c) to be tested is stretched. The fixture also includes a cylinder (51) mounted on the frame (43) and a tension sensor (49) for connecting the actuator of the cylinder (51) to the movable clamp (45). The tension sensor (49) is electrically connected to a force gauge (50) so that when the actuator of the cylinder (51) applies a movement away from the fixed clamp (44) to the movable clamp (45), the force gauge (50) obtains tensile performance data.

11. A negative electrode post production system according to claim 10, characterized in that, The movable clamp (45) includes two sets of detachably connected upper sub-molds (4501). Each upper sub-mold (4501) is connected to one end of the tension sensor (49). The bottom of the upper sub-mold (4501) is provided with a first cavity (4502). The two first cavities (4502) together form an upper contour cavity, which is used to clamp and limit one end of the negative electrode post (c) to be tested. The two upper sub-molds (4501) each have a first T-shaped insert (4504) and a first T-shaped slot (4505), and the first T-shaped insert (4504) and the first T-shaped slot (4505) are adapted to be inserted into each other so that after the two upper sub-molds (4501) are inserted into the first T-shaped insert (4504) and the first T-shaped slot (4505) and locked by the first bolt (4503), the two first cavities (4502) are enclosed to form an upper contour cavity.

12. The negative electrode post production system according to claim 10, characterized in that, The fixing fixture (44) includes two sets of detachably connected lower sub-molds (4401). Any one of the lower sub-molds (4401) is connected to the frame (43). The top of the lower sub-mold (4401) is provided with a second cavity (4402). The two second cavities (4402) together form a lower contour cavity. The lower contour cavity is used to clamp and limit the other end of the negative electrode post (c) to be tested. The two lower sub-molds (4401) each have a second T-shaped insert (4404) and a second T-shaped slot (4405), and the second T-shaped insert (4404) and the second T-shaped slot (4405) are adapted to be inserted into each other so that after the two lower sub-molds (4401) are inserted into the second T-shaped insert (4404) and the second T-shaped slot (4405) and locked by the second bolt (4403), the two second cavities (4402) are enclosed to form a lower contour cavity.

13. The negative electrode post production system according to claim 1, characterized in that, The tear test fixture includes a base (57) and a clamp on the base (57). The clamp includes a support (61) on the base (57). The support (61) has two sets of clamping blocks arranged opposite to each other. The two clamping blocks can move relative to each other to create a clamping area that is adjustable in size and used to clamp the copper part (55) or the aluminum part (56). The support (61) is designed to slide on the base (57). When a tensile force is applied to the aluminum part (56) or the copper part (55), the support (61) can drive the tear point to move in the direction of the tensile force line.

14. A negative electrode production system according to claim 13, characterized in that, The base (57) is provided with a slide rail (60) for sliding installation of the support (61), and the sliding direction of the support (61) on the slide rail (60) is parallel to the tear path direction. The two clamping blocks are defined as a fixed block (62) and a movable block (63), respectively. The fixed block (62) is fixedly installed on the support (61), and the movable block (63) is movably installed on the support (61). The movable block (63) can move toward or away from the fixed block (62) to form the clamping area.

15. A negative electrode post production system according to claim 14, characterized in that, The movable block (63) is provided with a waist-shaped hole (66), and the movable block (63) is sleeved on the outside of the pin (65) on the support (61) by means of the waist-shaped hole (66). The length direction of the waist-shaped hole (66) is perpendicular to the length direction of the fixed block (62), so that the movable block (63) has a range of motion to move toward or away from the fixed block (62). The support (61) is provided with screws (64) so ​​that when the moving block (63) and the fixed block (62) are in contact with the copper part (55) or the aluminum part (56) on the same side, the screws (64) can tighten to apply a force to the moving block (63) towards the fixed block (62), so that the moving block (63) presses the copper part (55) or the aluminum part (56) against the fixed block (62). The pin (65) is configured as a bolt threaded onto the support (61) so that when the moving block (63) presses the copper part (55) or aluminum part (56) against the fixed block (62), the bolt can be tightened to lock the moving block (63) onto the support (61) by its head.

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