A pole forming process based on T-shaped copper-aluminum composite strip

Abstract

The present invention discloses a pole forming process based on a T-shaped copper-aluminum composite strip, which uses the T-shaped copper-aluminum composite strip to make continuous step-by-step motion in a continuous punching die, and punches a center hole and a countersunk hole at the center hole port at the center of the forming area of ​​the T-shaped copper-aluminum composite strip, so that a step is formed between the countersunk hole and the center hole port; punches the forming area of ​​the T-shaped copper-aluminum composite strip, so that a bulge is formed on the upper surface of the narrow copper strip of the T-shaped copper-aluminum composite strip; punches along the edge of the bulge on the T-shaped copper-aluminum composite strip, so that the edge of the bulge is separated from the narrow copper strip of the T-shaped copper-aluminum composite strip, so as to form a punching groove and a semi-finished product connected to the punching groove; punches along the edge of the semi-finished product on the T-shaped copper-aluminum composite strip, so that the semi-finished product and the connector are punched off to form a copper-aluminum composite pole. It saves the intermediate manual transportation, thereby greatly improving the production efficiency and reducing the waste and cost of copper materials.

Description

Technical Field

[0001] The present invention relates to the technical field of battery pole forming for new energy vehicles, and in particular to a pole forming process based on a T-shaped copper-aluminum composite material strip. Background Art

[0002] The battery of a new energy vehicle consists of an outer shell, a battery top cover, a positive electrode column, a negative electrode column and a battery cell placed in the outer shell, wherein the positive electrode column and the negative electrode column are important parts for conducting connection with the execution unit and the control unit of the new energy vehicle. However, the negative electrode column generally adopts a copper-aluminum composite electrode. In the prior art, the manufacture of the copper-aluminum composite electrode generally adopts batch punching out a copper-aluminum composite blank on a copper-aluminum composite strip with the same width as the aluminum strip and the copper strip, and then manually batch transfers it to the cold heading process to cold head the copper-aluminum composite blanks one by one to form a copper-aluminum composite electrode product. Therefore, this method has the problem of manual transfer, which makes the production efficiency low, and the punching process of the copper-aluminum composite strip with the same width as the aluminum strip and the copper strip makes the material utilization rate of the copper-aluminum composite strip low, resulting in serious waste of copper materials, and thus high production costs. Summary of the invention

[0003] The present invention is a pole forming process based on a T-shaped copper-aluminum composite strip designed to solve the deficiencies of the above technical problems.

[0004] The present invention provides a pole forming process based on a T-shaped copper-aluminum composite strip, comprising the following steps:

[0005] S1. Using a T-shaped copper-aluminum composite strip to perform continuous step-by-step motion in a continuous punching die, and punching four long side holes arranged in a circular array around the forming area of ​​the T-shaped copper-aluminum composite strip, two long side holes (2) are spaced apart along the length direction of the T-shaped copper-aluminum composite strip, and both of them allow the wide aluminum strip and the narrow copper strip of the T-shaped copper-aluminum composite strip to penetrate each other, and the other two long side holes (2) are spaced apart along the width direction of the T-shaped copper-aluminum composite strip, and both of them are formed on the opposite sides of the wide aluminum strip of the T-shaped copper-aluminum composite strip near the length edge of the narrow copper strip;

[0006] S2. Punching a center hole and a countersunk hole at the end of the center hole at the center of the forming area of ​​the T-shaped copper-aluminum composite strip, so that a step is formed between the countersunk hole and the end of the center hole;

[0007] S3, punching out the forming area of ​​the T-shaped copper-aluminum composite material strip so that a bulge is formed on the upper surface of the narrow copper strip of the T-shaped copper-aluminum composite material strip;

[0008] S4, punching is performed along the raised edge on the T-shaped copper-aluminum composite material strip, so that the raised edge is separated from the narrow copper strip of the T-shaped copper-aluminum composite material strip to form a punching groove and a semi-finished product located in the punching groove, and the outer peripheral wall of the semi-finished product is at least partially connected to the inner wall of the wide aluminum strip located in the T-shaped copper-aluminum composite material strip in the punching groove through a connector;

[0009] S5. Punch along the edge of the semi-finished product on the T-shaped copper-aluminum composite material strip to cut off the semi-finished product and the connector to form a copper-aluminum composite pole.

[0010] According to the above-mentioned pole forming process based on the T-shaped copper-aluminum composite strip, the steps of forming the four elongated side holes in step S1 are as follows:

[0011] S11, punching and continuously forming a plurality of elongated side holes arranged along the width direction of the narrow copper strip of the T-shaped copper-aluminum composite material strip in the unpunched area of ​​the T-shaped copper-aluminum composite material strip in a continuous step-by-step manner, wherein the plurality of elongated side holes are spaced apart along the length direction of the T-shaped copper-aluminum composite material strip;

[0012] S12. Long side holes arranged along the length direction of the T-shaped copper-aluminum composite material strip are formed on both long edge portions of the wide aluminum strip of the T-shaped copper-aluminum composite material strip in a continuous step-by-step manner. Each long side hole arranged along the length direction of the T-shaped copper-aluminum composite material strip is located between the ends of two long side holes arranged along the width direction of the T-shaped copper-aluminum composite material strip.

[0013] According to the above-mentioned pole forming process based on the T-shaped copper-aluminum composite strip, two symmetrically arranged oblique holes are respectively arranged at both ends of each elongated side hole arranged along the width direction of the narrow copper strip of the T-shaped copper-aluminum composite strip.

[0014] According to the above-mentioned pole forming process based on the T-shaped copper-aluminum composite strip, in step S2, the forming steps of the center hole and the countersunk hole located at the end of the center hole are as follows:

[0015] S21, punching a central hole at the center of the forming area surrounded by four long side hole annular arrays;

[0016] S22. Punch the end of the center hole to form a countersink, and the inner diameter of the countersink is larger than the inner diameter of the center hole to form a step between the lower end of the countersink and the upper end of the center hole.

[0017] According to the above-mentioned pole forming process based on the T-shaped copper-aluminum composite strip, after the semi-finished product is formed, elastic bodies are formed between the inner walls of the punching grooves and the elongated side holes.

[0018] According to the above-mentioned pole forming process based on the T-shaped copper-aluminum composite strip, before step S1, it also includes a guide hole forming step, in which the guide holes are punched out at the two long edges of the wide aluminum strip of the T-shaped copper-aluminum composite strip.

[0019] According to the above-described pole forming process based on the T-shaped copper-aluminum composite strip, the formed protrusion is a square structure, so that the formed punching groove and the semi-finished product are also square, so that the formed copper-aluminum composite pole is a square copper-aluminum composite pole, and the center of the square copper-aluminum composite pole has a center hole, a countersunk hole and a step.

[0020] According to the above-described pole forming process based on the T-shaped copper-aluminum composite strip, in step S3, after the protrusion is formed, the outer walls on both sides of the protrusion are respectively adjacent to the edges of the narrow copper strip of the T-shaped copper-aluminum composite strip in both length directions.

[0021] According to the above-described pole forming process based on the T-shaped copper-aluminum composite strip, in step S4, the inner side walls on opposite sides of the punching groove are respectively adjacent to the edges of the narrow copper strip of the T-shaped copper-aluminum composite strip in two length directions.

[0022] According to the above-described pole forming process based on T-shaped copper-aluminum composite strip, a step forming step is added between step S4 and step S5, and the edge of the copper body of the semi-finished product is punched out using a protective punch, so that the edge of the copper body of the semi-finished product forms a step.

[0023] The present invention designs a pole forming process based on a T-shaped copper-aluminum composite material strip, which utilizes a continuous step-by-step punching method to punch out finished copper-aluminum composite poles one by one on the T-shaped copper-aluminum composite material strip, thereby eliminating intermediate manual transportation and greatly improving production efficiency. In addition, the copper strip of the T-shaped copper-aluminum composite material strip is narrow, so that only a very small amount of copper material is reserved around the punching groove, further reducing copper material waste and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a layout drawing for continuous punching on the front side.

[0025] Figure 2 yes Figure 1 Cross-sectional view of the layout diagram.

[0026] Figure 3 This is an enlarged view of point A.

[0027] Figure 4 This is an enlarged view of point B.

[0028] Figure 5 It is a cross-sectional view of a T-shaped copper-aluminum composite strip.

[0029] Figure 6It is a schematic diagram of step forming.

[0030] In the figure: 1. pilot hole; 2. elongated side hole; 21. oblique hole; 3. center hole; 4. countersunk hole; 5. protrusion; 6. step; 7. punching groove; 8. semi-finished product; 9. copper-aluminum composite pole; 10. connector; 100. T-shaped copper-aluminum composite strip; 101. wide aluminum strip; 102. narrow copper strip; 11. elastomer; 12. protective punch; 13. step. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0032] like Figure 1-Figure 6 As shown, the pole forming process based on the T-shaped copper-aluminum composite strip described in this embodiment includes the following steps:

[0033] S1. Using a T-shaped copper-aluminum composite material strip 100 to perform continuous step-by-step motion in a continuous punching die, and punching four long side holes 2 arranged in a circular array around the forming area of ​​the T-shaped copper-aluminum composite material strip 100, two long side holes (2) are spaced apart along the length direction of the T-shaped copper-aluminum composite material strip 100, and both of them make the wide aluminum strip 101 and the narrow copper strip 102 of the T-shaped copper-aluminum composite material strip 100 interpenetrate each other, and the other two long side holes (2) are spaced apart along the width direction of the T-shaped copper-aluminum composite material strip 100, and both of them are formed on the opposite two sides of the wide aluminum strip 101 of the T-shaped copper-aluminum composite material strip 100 near the length edge of the narrow copper strip 102; the forming steps are as follows:

[0034] S11. A plurality of elongated side holes 2 arranged along the width direction of the narrow copper strip 102 of the T-shaped copper-aluminum composite material strip 100 are continuously formed by continuously stepping through the unpunched area of ​​the T-shaped copper-aluminum composite material strip 100. The plurality of elongated side holes 2 are spaced apart along the length direction of the T-shaped copper-aluminum composite material strip 100.

[0035] S12. Long side holes 2 arranged along the length direction of the T-shaped copper-aluminum composite material strip 100 are formed on both long edge portions of the wide aluminum strip 101 of the T-shaped copper-aluminum composite material strip 100 in a continuous step-by-step manner. Each long side hole 2 arranged along the length direction of the T-shaped copper-aluminum composite material strip 100 is located between the ends of two long side holes 2 arranged along the width direction of the T-shaped copper-aluminum composite material strip 100.

[0036] In the above step S1, the four elongated side holes 2 are formed in steps so that the T-shaped copper-aluminum composite strip 100 is not easily deformed after punching. At the same time, the formation of the four elongated side holes 2 provides an elastic space for the punch when the protrusion 5 is extruded and punched to form the semi-finished product 8 and the finished product, making the punching of the semi-finished product 8 and the finished product easier, avoiding the reduction of the service life of the punch due to the rigid support around the punching groove 7, which causes the punch punching to be rigid punching, thereby improving the service life of the punch.

[0037] Furthermore, two symmetrically arranged oblique holes 21 are respectively arranged at both ends of the elongated side holes 2 arranged along the width direction of the narrow copper strip 102 of the T-shaped copper-aluminum composite strip 100. The arrangement of the oblique holes 21 can avoid the position during stamping, making the stamping more reliable.

[0038] S2, punching and forming a center hole 3 and a countersunk hole 4 located at the end of the center hole 3 at the center of the forming area of ​​the T-shaped copper-aluminum composite strip 100, so as to form a step 6 between the countersunk hole 4 and the end of the center hole 3; the forming steps are as follows:

[0039] S21, punching and forming a central hole 3 at the center of the forming area surrounded by the four long side holes 2 in a circular array;

[0040] S22, punching the end of the center hole 3 to form a countersink 4, and the inner diameter of the countersink 4 is larger than the inner diameter of the center hole 3, so as to form a step 6 between the lower end of the countersink 4 and the upper end of the center hole 3.

[0041] In the above step S2, the center hole 3 and the countersunk hole 4 are punched out in separate steps to make it easier to form the center hole 3 and the countersunk hole 4 and avoid deformation of the center hole 3 or the countersunk hole 4 due to simultaneous forming.

[0042] S3. Punch the forming area of ​​the T-shaped copper-aluminum composite material strip 100 from top to bottom to form a protrusion 5 on the upper surface of the narrow copper strip 102 of the T-shaped copper-aluminum composite material strip 100; the outer walls on both sides of the protrusion 5 are respectively adjacent to the edges of the narrow copper strip 102 of the T-shaped copper-aluminum composite material strip 100 in the two length directions.

[0043] S4. The forming area of ​​the T-shaped copper-aluminum composite strip 100 is punched out along the edge of the protrusion 5 from top to bottom, so that the edge of the protrusion 5 is separated from the narrow copper strip 102 of the T-shaped copper-aluminum composite strip 100 to form a punching groove 7 and a semi-finished product 8 located in the punching groove 7, and at least part of the outer peripheral wall of the semi-finished product 8 is still connected to the inner wall of the wide aluminum strip 101 of the T-shaped copper-aluminum composite strip 100 in the punching groove 7 through the connector 10; the inner side walls on the opposite sides of the punching groove 7 are respectively adjacent to the edges of the narrow copper strip 102 of the T-shaped copper-aluminum composite strip 100 in both length directions, and an elastic body 11 is formed between the inner wall of the punching groove 7 and each elongated side hole 2, and the width margin of the elastic body 11 is only 0.5 mm, compared with the width margin of the elastic body 11 left by the existing production method of 23-42 mm, thereby greatly reducing the waste of copper material and improving material utilization.

[0044] S5. Punch the forming area of ​​the T-shaped copper-aluminum composite strip 100 from top to bottom along the edge of the semi-finished product 8 so that the semi-finished product 8 and the connector 10 are cut off and the copper-aluminum composite pole 9 is formed by blanking.

[0045] In this embodiment, before step S1, a guide hole 1 forming step is also included, in which the guide holes 1 are punched out at the two long edge portions of the wide aluminum strip 101 of the T-shaped copper-aluminum composite material strip 100; its structure allows the guide pins to be inserted into the guide holes 1 during punching to position the T-shaped copper-aluminum composite material strip 100 to prevent deviation due to punching.

[0046] In this embodiment, the formed protrusion 5 is a square structure, so that the formed punching groove 7 and the semi-finished product 8 are also square, so that the formed copper-aluminum composite pole 9 is a square copper-aluminum composite pole 9, and the center of the square copper-aluminum composite pole 9 has a center hole 3, a countersunk hole 4 and a step 6; its structure is set to adapt to the corresponding battery top cover.

[0047] like Figure 6 As shown, a step 13 forming step is added between step S4 and step S5 , so the copper body edge of the semi-finished product 8 is punched out using the protective punch 12 , so that the copper body edge of the semi-finished product 8 forms a step 13 .

Claims

1. A pole forming process based on T-shaped copper-aluminum composite strip, characterized in that: The steps include: S1. Using a T-shaped copper-aluminum composite strip (100) to perform continuous step-by-step motion in a continuous punching die, four long side holes (2) arranged in a circular array are punched out around the forming area of ​​the T-shaped copper-aluminum composite strip (100), two of the long side holes (2) are spaced apart along the length direction of the T-shaped copper-aluminum composite strip (100), and both of them allow the wide aluminum strip (101) and the narrow copper strip (102) of the T-shaped copper-aluminum composite strip (100) to penetrate each other, and the other two long side holes (2) are spaced apart along the width direction of the T-shaped copper-aluminum composite strip (100), and both of them are formed on the opposite sides of the wide aluminum strip (101) of the T-shaped copper-aluminum composite strip (100) near the length edge of the narrow copper strip (102); S2, punching and forming a center hole (3) and a countersunk hole (4) located at the end of the center hole (3) at the center of the forming area of ​​the T-shaped copper-aluminum composite strip (100), so as to form a step (6) between the countersunk hole (4) and the end of the center hole (3); S3, punching out the forming area of ​​the T-shaped copper-aluminum composite material strip (100) so that a protrusion (5) is formed on the upper surface of the narrow copper strip (102) of the T-shaped copper-aluminum composite material strip (100); S4, punching is performed along the edge of the protrusion (5) on the T-shaped copper-aluminum composite material strip (100), so that the edge of the protrusion (5) is separated from the narrow copper strip (102) of the T-shaped copper-aluminum composite material strip (100), so as to form a punching groove (7) and a semi-finished product (8) located in the punching groove (7), and the outer peripheral wall of the semi-finished product (8) is at least partially still connected to the inner wall of the wide aluminum strip (101) of the T-shaped copper-aluminum composite material strip (100) in the punching groove (7) through the connector (10); S5. Punching is performed along the edge of the semi-finished product (8) on the T-shaped copper-aluminum composite material strip (100) so that the semi-finished product (8) and the connector (10) are cut off and the copper-aluminum composite pole (9) is formed by blanking.

2. A pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: In step S1, the steps of forming the four elongated side holes (2) are as follows: S11, punching and continuously forming a plurality of elongated side holes (2) arranged along the width direction of the narrow copper strip (102) of the T-shaped copper-aluminum composite material strip (100) in the unpunched area of ​​the T-shaped copper-aluminum composite material strip (100) in a continuous step-by-step manner, wherein the plurality of elongated side holes (2) are distributed at intervals along the length direction of the T-shaped copper-aluminum composite material strip (100); S12. Long side holes (2) arranged along the length direction of the T-shaped copper-aluminum composite material strip (100) are formed on both long edge portions of the wide aluminum strip (101) of the T-shaped copper-aluminum composite material strip (100) in a continuous step-by-step manner, and each long side hole (2) arranged along the length direction of the T-shaped copper-aluminum composite material strip (100) is located between the ends of two long side holes (2) arranged along the width direction of the T-shaped copper-aluminum composite material strip (100).

3. A pole forming process based on T-shaped copper-aluminum composite strip according to claim 2, characterized in that: Two symmetrically arranged oblique holes (21) are respectively arranged at both ends of each elongated side hole (2) arranged along the width direction of the narrow copper strip (102) of the T-shaped copper-aluminum composite material strip (100).

4. A pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: In step S2, the steps of forming the center hole (3) and the counterbore (4) located at the end of the center hole (3) are as follows: S21, punching out a central hole (3) at the center of the forming area surrounded by the four elongated side holes (2) in a circular array; S22. Punching the end of the center hole (3) to form a countersunk hole (4), wherein the inner diameter of the countersunk hole (4) is larger than the inner diameter of the center hole (3), so as to form a step (6) between the lower end of the countersunk hole (4) and the upper end of the center hole (3).

5. The pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: After the semi-finished product (8) is formed, an elastic body (11) is formed between the inner wall of the punching groove (7) and each of the elongated side holes (2).

6. A pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: Before step S1, a guiding hole (1) forming step is also included, in which the guiding holes (1) are punched out at two elongated edge portions of the wide aluminum strip (101) of the T-shaped copper-aluminum composite strip (100).

7. A pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: The formed protrusion (5) is a square structure, so that the formed punching groove (7) and the semi-finished product (8) are also square, so that the formed copper-aluminum composite pole (9) is a square copper-aluminum composite pole (9), and the center of the square copper-aluminum composite pole (9) has a center hole (3), a countersunk hole (4) and a step (6).

8. The pole forming process based on T-shaped copper-aluminum composite strip according to claim 1, characterized in that: In step S3, after the protrusion (5) is formed, the outer walls on two opposite sides of the protrusion (5) are respectively adjacent to the edges of the narrow copper strip (102) of the T-shaped copper-aluminum composite material strip (100) in two length directions.

9. According to a pole forming process based on a T-shaped copper-aluminum composite strip as described in claim 1 or 7, in step S4, the inner side walls on the opposite sides of the punching groove (7) are respectively adjacent to the edges of the narrow copper strip (102) of the T-shaped copper-aluminum composite strip (100) in two length directions.

10. According to the pole forming process based on T-shaped copper-aluminum composite strip described in claim 1, a step (13) forming step is added between step S4 and step S5, and the copper body edge of the semi-finished product (8) is punched out using a protective punch (12), so that the copper body edge of the semi-finished product (8) forms a step (13).

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