Storage battery copper pole piece punch forming equipment

Abstract

The invention relates to the technical field of copper electrode plate machining, in particular to storage battery copper electrode plate punch forming equipment which comprises a base, stand columns, a lifting platform, a lifting drive, an upper die and a lower die. The multiple stand columns are vertically and fixedly installed on the base, the lifting drive is installed at the top ends of the stand columns, and the lifting platform is slidably installed on the stand columns; the upper die is fixed to the lower surface of the lifting platform, the lower die is fixed to the upper portion of the base, and the lifting drive is in transmission connection with the lifting platform, drives the lifting platform to ascend and descend and is provided with a short-distance force application structure. The pneumatic drive is arranged to drive the lifting platform to conduct lifting operation to complete the stamping process, the gas pressure in the gas cavity can accumulate large pressure in the front half section of the stamping stroke, resistance for downward movement of the core column is not caused after the reversing projectile body crosses the horizontal line, and the core column moves under the large pressure in the gas cavity.

Description

Technical Field

[0001] The invention relates to the technical field of copper electrode sheet processing, in particular to a battery copper electrode sheet stamping and forming device. Background Art

[0002] Batteries, cells and other energy storage components are indispensable components of mobile electrical equipment. In addition to electrolytes and positive and negative electrode materials, batteries and cells also use a large number of electrodes that conduct electricity to the outside. Electrode sheets are generally made of materials with high conductivity. Except for high-value batteries such as mobile phones and computers, the battery electrodes of new energy vehicles and small electric bicycles are all made of copper materials, and the amount used is very large.

[0003] In the existing technology for processing copper electrode sheets, stamping and cutting are generally used. Large-format copper sheets are sent to the stamping operation position. After the machine stamping is completed, the operator pulls out the processed electrode sheet and replaces it with a new copper sheet to wait for stamping. For some high-current battery electrodes, the copper sheet will be required to be thicker to prevent the electrode sheet from heating up due to large local resistance when conducting current, further affecting the electrical performance. The stamping of thick copper sheets requires a larger stamping force to complete. The actuator of the stamping machine is lifted higher, and a larger movement stroke is used to accumulate energy to achieve the stamping operation. Since too much space is left between the upper and lower dies, if the operator does not operate in a standardized manner, or other parts float into the working space during the descent, it is very easy to cause danger. In the existing technology, a protective net is installed within the operating range of the stamping machine, which affects the operator's field of vision and also affects the efficiency of loading and unloading. Summary of the invention

[0004] The purpose of the present invention is to provide a method to solve the problems raised in the prior art.

[0005] To achieve the above object, the present invention provides the following technical solutions: A battery copper pole piece stamping and forming equipment, the forming equipment includes a base, a column, a lifting platform, a lifting drive, an upper mold, and a lower mold. A plurality of columns are vertically fixedly installed on the base, the lifting drive is installed on the top of the column, the lifting platform is slidably installed on the column, the upper mold is fixed on the lower surface of the lifting platform, the lower mold is fixed on the upper part of the base, the lifting drive is connected to the lifting platform and drives the lifting platform to rise and fall, and the lifting drive has a short-distance force structure.

[0006] For the sake of safety during pole piece stamping, the opening distance between the upper die and the lower die should not be too large, otherwise the operator may unconsciously put his palm, arm or even upper limbs close to observe the copper sheet at the stamping position, or be too close to the stamping position during the loading and unloading process. Once the machine operation is not standardized, personal injury may easily occur. The upper limit position of the upper die in this application is set relatively low to reduce the material replacement space and prevent the operator from entering too much and causing danger. When the opening distance between the upper die and the lower die is close, the force during copper sheet stamping needs to be fully guaranteed. When the force is applied over a short distance, traditional motors, crank slider structures, hydraulic cylinders and other driving methods may not be sufficient to quickly accumulate enough force to punch out the copper sheet. Therefore, it is necessary to design a lifting drive force structure separately to complete the stamping operation in a small space.

[0007] The lifting platform includes a guide plate, a core column, and a mounting plate. The lifting drive includes a shell. The upper end of the column is fixed to the outer surface of the shell. The inside of the shell is hollowed out and the top is closed. An annular sealing shoulder is arranged on the inner surface of the shell. The guide plate is slidably installed on the column. The core column is fixedly installed on the upper surface of the guide plate, and the mounting plate is fixedly installed on the lower surface of the guide plate. The upper part of the core column is in sliding contact with the sealing shoulder. The core column and the sealing shoulder seal the upper part of the shell to form an air cavity, which is connected to an external air source. The gas in the air cavity is charged at the front part of the stamping operation time period.

[0008] When the upper die is in the upper limit position and gas enters the air cavity, the air pressure pushes the core column downward until the stamping operation is completed. The core column is in a small space with a short distance, and the acceleration may be small, so that the final contact speed is low. In other words, the accumulated momentum may not be enough to achieve the blanking operation. Therefore, when the gas in the air cavity of the present application performs the action, it will first accumulate force. After sufficient force is accumulated, the core column will move completely downward, and quickly move downward for stamping under a large pressure difference to accumulate sufficient momentum. The force accumulation of the air cavity can be a certain structure to fix the core column during the stage of rising air pressure in the air cavity, or to allow a small amount of the core column to move downward.

[0009] The lifting drive also includes at least two reversing springs, one end of which is hinged to the inner wall of the shell, and the other end of which is hinged to the outer surface of the core column. The reversing springs are evenly distributed around the circumference of the core column axis. The reversing springs have an elastic pre-tightening force that stretches outward. When the core column is in the middle position within the travel range, the reversing springs are in a horizontal posture.

[0010] The reversing elastic body can be compressed in the first half of the downward movement of the core column, that is, the reversing elastic body hinders the downward movement of the core column in the first half of the downward movement of the core column, and the air cavity can have more time to allow the high-pressure gas supplied by the gas source to enter and increase the pressure in the air cavity. This process is the force accumulation process. After a large pressure accumulates in the air cavity, the corresponding reversing elastic body swings to the middle position. After that, the further downward movement of the core column corresponds to the elongation process of the reversing elastic body. The reversing elastic body no longer serves as a resistance to the downward movement of the core column, but allows the core column to move further and quickly downward, thereby increasing the downward acceleration of the core column and quickly increasing the momentum of the upper die to perform stamping operations.

[0011] The reversing elastic body includes a first rocker arm, a second rocker arm, and an elastic body. The first rocker arm and the second rocker arm are telescopically connected. One end of the first rocker arm away from the second rocker arm is hinged to the inner wall of the shell, and one end of the second rocker arm away from the first rocker arm is hinged to the outer wall of the core column. The elastic body is padded between the first rocker arm and the second rocker arm.

[0012] The elastomer is compressed and pressed between the first and second rocker arms. The elastomer stretches the two rocker arms apart. The two rocker arms are hinged to the shell and the core column respectively, serving as the two ends of the compressed elastomer. When the first rocker arm is lower than the second rocker arm, the elastomer constitutes resistance to the downward movement of the core column. When the first rocker arm is higher than the second rocker arm, the elastomer promotes the downward movement of the core column, increases the momentum, and realizes the force storage process of the air cavity.

[0013] The forming device also includes a buffer sleeve, which is arranged on the upper surface of the guide plate at the position where the column passes through.

[0014] The buffer sleeve prevents the lifting platform from colliding with the fixed components above during the rising process. Due to the existence of the reversing spring, after the lifting platform drives the upper die to complete the stamping operation, the reversing spring will also accumulate and apply force during the lifting of the lifting platform. Therefore, the lifting of the lifting platform may also have a large momentum causing collisions between components. The buffer sleeve prevents damage to the components and reduces the degree of impact.

[0015] The forming equipment also includes an electrical box, which is arranged on the side of the base or the side of the lifting drive. Cables extend from the electrical box and are connected to the mating surfaces of the upper and lower dies. The copper sheet to be stamped placed on the lower die is connected to one pole of the electrical box cable. A punching column is arranged in the middle of the upper die, and the punching column is connected to the other pole of the electrical box cable.

[0016] After stamping is completed, the electric box energizes the copper sheet and the upper die of the workpiece respectively. There are some burrs on the edge of the copper sheet being punched. The high voltage electricity forms an arc between the copper sheet and the upper die, melting the burrs at high temperature in a very short time, realizing electric spark deburring.

[0017] The copper sheet is connected to the positive pole of the power supply process of the electric box.

[0018] During the electric spark discharge process, the positive electrode temperature is higher, which makes it easier to melt the burrs and reduce the arc loss of the upper die.

[0019] The lower surface of the punching column is hollowed out inwards to form a cone.

[0020] The sharper shape is more likely to increase the local electric field strength, making arc discharge more likely to occur, and the burrs on the copper sheet are more likely to be generated at the punched inner hole. The punching column is the closest part of the upper die. The inward hole on the lower surface of the punching column improves the sharpness of the edge, which improves the blanking performance and makes arc discharge easier.

[0021] The upper die is detachably mounted on the mounting plate, and the lower die is detachably connected to the base.

[0022] It is convenient to replace the upper and lower dies, adapt to different types of copper electrode sheets, and expand the production range.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows: the present application drives the lifting platform to perform lifting operations to complete the stamping process by setting up a pneumatic drive, and the gas pressure in the air cavity can accumulate a relatively large pressure in the first half of the stamping stroke. After the reversing body crosses the horizontal line, it no longer causes resistance to the downward movement of the core column, allowing the core column to move under a relatively large pressure in the air cavity, accumulating a relatively large momentum in a narrow space to perform the stamping action, and preventing the upper and lower mold spaces of the stamping operation from being large and causing danger. After the stamping is completed, the additionally set electric box passes high voltage electricity to the copper sheet and the upper mold to form an arc, and the arc spontaneously flows through the sharp burrs, and the burrs are melted to achieve a deburring effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cutaway structure of the present invention; Figure 3 It is a structural schematic diagram of the lifting platform and lifting drive of the present invention; Figure 4 yes Figure 3 A partial view in FIG. Figure 5 It is a schematic diagram of the stamping principle of the copper sheet between the upper die and the lower die of the present invention; Figure 6 It is a front view schematic diagram of the copper sheet processed by the present invention; In the figure: 1. base; 11. chip collecting groove; 2. column; 3. lifting platform; 31. guide plate; 32. core column; 33. mounting plate; 4. lifting drive; 41. shell; 42. air cavity; 43. sealing shoulder; 44. reversing spring; 441. first rocker arm; 442. second rocker arm; 443. elastic body; 51. upper die; 511. punching column; 52. lower die; 6. electrical box; 8. buffer sleeve; 9. copper sheet. DETAILED DESCRIPTION

[0025] The following will be combined with the 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 without creative work are within the scope of protection of the present invention.

[0026] A battery copper pole piece stamping and forming equipment, the forming equipment includes a base 1, a column 2, a lifting platform 3, a lifting drive 4, an upper mold 51, and a lower mold 52. A plurality of columns 2 are vertically fixedly installed on the base 1, the lifting drive 4 is installed on the top of the column 2, the lifting platform 3 is slidably installed on the column 2, the upper mold 51 is fixed on the lower surface of the lifting platform 3, the lower mold 52 is fixed on the upper part of the base 1, the lifting drive 4 is transmission-connected to the lifting platform 3 and drives the lifting platform 3 to rise and fall, and the lifting drive 4 has a short-distance force application structure.

[0027] like Figure 1 , 2 As shown, for the sake of safety during pole piece stamping, the opening distance between the upper die 51 and the lower die 52 should not be too large, otherwise the operator may unconsciously put his palm, arm or even upper limbs close to observe the copper sheet at the stamping position, or be too close to the stamping position during the loading and unloading process. Once the machine operation is not standardized, personal injury may easily occur. The upper limit position of the upper die 51 of the present application is set relatively low to reduce the material replacement space and prevent the operator from entering too much and causing danger. When the opening distance between the upper die 51 and the lower die 52 is relatively close, the force used for stamping the copper sheet 9 needs to be fully guaranteed. When applying force over a short distance, traditional driving methods such as motors, crank slider structures, and hydraulic cylinders may not be sufficient to quickly accumulate force sufficient to punch out the copper sheet. Therefore, it is necessary to design a force application structure for the lifting drive 4 separately to complete the stamping operation in a small space.

[0028] The lifting platform 3 includes a guide plate 31, a core column 32, and a mounting plate 33. The lifting drive 4 includes a shell 41. The outer surface of the shell 41 is fixed to the upper end of the column 2. The inside of the shell 41 is hollow and the top is closed. An annular sealing shoulder 43 is arranged on the inner surface of the shell 41. The guide plate 31 is slidably installed on the column 2. The core column 32 is fixedly installed on the upper surface of the guide plate 31, and the mounting plate 33 is fixedly installed on the lower surface of the guide plate 31. The upper part of the core column 32 is in sliding contact with the sealing shoulder 43. The core column 32 and the sealing shoulder 43 seal the upper part of the shell 41 to form an air cavity 42. The air cavity 42 is connected to an external air source. The gas in the air cavity 42 accumulates force in the front part of the stamping operation time period.

[0029] like Figure 2 , 3As shown, when the upper die 51 is in the upper limit position and gas enters the air cavity 42, the air pressure pushes the core column 32 downward until the stamping operation is completed. The core column 32 is in a small space with a short distance, and the acceleration may be small, so that the final contact speed is low. In other words, the accumulated momentum may not be sufficient to achieve the blanking operation. Therefore, when the gas in the air cavity 42 of the present application is performing an action, it will first perform a force accumulation process. After sufficient force is accumulated, the core column 32 will move completely downward again, and quickly move downward for stamping under a large pressure difference to accumulate sufficient momentum. The force accumulation of the air cavity 42 can be a certain structure to fix the core column 32 during the rising stage of the air pressure in the air cavity 42, or to allow a small amount of the core column 32 to move downward.

[0030] The lifting drive 4 also includes at least two reversing springs 44, one end of the reversing spring 44 is hinged to the inner wall of the shell 41, and the other end of the reversing spring 44 is hinged to the outer surface of the core column 32. The reversing springs 44 are evenly distributed around the axis of the core column 32. The reversing springs 44 have an elastic pre-tightening force that stretches outward. When the core column 32 is in the middle position within the travel range, the reversing springs 44 are in a horizontal posture.

[0031] like Figure 3 , 4 As shown, the reversing elastic body 44 can be compressed in the first half of the downward movement of the core column 32, that is, the reversing elastic body 44 hinders the downward movement of the core column 32 in the first half of the downward movement of the core column 32, and the air cavity 42 can have more time to allow the high-pressure gas supplied by the gas source to enter and increase the pressure in the air cavity 42. This process is the force accumulation process. After a large pressure accumulates in the air cavity 42, the corresponding reversing elastic body 44 swings to the middle position. After that, the further downward movement of the core column 32 corresponds to the elongation process of the reversing elastic body 44. The reversing elastic body 44 no longer serves as a resistance to the downward movement of the core column 32, but allows the core column 32 to move further and quickly downward, thereby increasing the downward acceleration of the core column 32 and quickly increasing the momentum of the upper mold 51 to perform the stamping operation.

[0032] The reversing spring 44 includes a first rocker arm 441, a second rocker arm 442, and an elastic body 443. The first rocker arm 441 and the second rocker arm 442 are telescopically connected. One end of the first rocker arm 441 away from the second rocker arm 442 is hinged to the inner wall of the shell 41, and one end of the second rocker arm 442 away from the first rocker arm 441 is hinged to the outer wall of the core column 32. The elastic body 443 is padded between the first rocker arm 441 and the second rocker arm 442.

[0033] like Figure 3 , 4As shown, the elastomer 443 is compressed and pressed between the first rocker arm 441 and the second rocker arm 442. The elastomer 443 stretches the two rocker arms, and the two rocker arms are hinged to the shell 41 and the core column 32 respectively, serving as the two ends of the compression elastomer 443. When the first rocker arm 441 is lower than the second rocker arm 442, the elastomer 443 constitutes a resistance to the downward movement of the core column 32. When the first rocker arm 441 is higher than the second rocker arm 442, the elastomer 443 promotes the downward movement of the core column 32, increases the momentum, and realizes the power storage process of the air cavity 42.

[0034] The molding device further includes a buffer sleeve 8 , which is arranged on the upper surface of the guide plate 31 at the position where the column 2 passes through.

[0035] like Figure 1 , 4 As shown, the buffer sleeve 8 prevents the lifting platform 3 from colliding with the upper fixed components during the rising process. Due to the existence of the reversing spring 44, after the lifting platform 3 drives the upper mold 51 to complete the stamping operation, the reversing spring 44 will also accumulate and apply force during the lifting of the lifting platform 3. Therefore, the lifting of the lifting platform 3 may also have a large momentum causing collisions between components. The buffer sleeve 8 prevents damage to the components and reduces the degree of impact.

[0036] The forming equipment also includes an electrical box 6, which is arranged on the side of the base 1 or the side of the lifting drive 4. Cables extend from the electrical box 6 and are connected to the mating surfaces of the upper mold 51 and the lower mold 52. The copper sheet 9 to be stamped placed on the lower mold 52 is connected to one pole of the cable of the electrical box 6. A punching column 511 is arranged in the middle of the upper mold 51, and the punching column 511 is connected to the other pole of the cable of the electrical box 6.

[0037] like Figure 1 , 5 As shown, after the stamping is completed, the electric box 6 energizes the workpiece copper sheet 9 and the upper die 51 respectively. There are some burrs at the edge of the copper sheet 9 that is punched. The high voltage electricity forms an arc between the copper sheet and the upper die, melting the burrs at high temperature in a very short time, thereby realizing electric spark deburring.

[0038] The copper sheet 9 is connected to the positive electrode of the power supply process of the electric box 6.

[0039] During the electric spark discharge process, the positive electrode temperature is higher, which makes it easier to melt the burrs and also reduces the arc loss of the upper mold 51.

[0040] The lower surface of the punching column 511 is hollowed out inwardly to form a cone.

[0041] like Figure 5 , 6As shown, the sharper shape is more likely to increase the local electric field strength, making arc discharge more likely to occur, and the burrs of the copper sheet 9 are more likely to be generated at the punched inner hole position. The punching column 511 is the closest part of the upper die 51. The lower surface of the punching column 511 is hollowed inward to improve the edge sharpness, which improves the punching performance and makes arc discharge easier. The punching column 511 causes the disc punched from the middle of the copper sheet 9 to drop into the base 1, and the side wall of the base 1 opens a chip collecting groove 11 to be taken away for processing.

[0042] The upper mold 51 is detachably mounted on the mounting plate 33 , and the lower mold 52 is detachably connected to the base 1 .

[0043] The upper mold 51 and the lower mold 52 can be easily replaced to adapt to different types of copper electrode sheets and expand the production range.

[0044] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

Claims

1. A battery copper pole piece stamping and forming equipment, characterized by: The molding device comprises a base (1), columns (2), a lifting platform (3), a lifting drive (4), an upper mold (51), and a lower mold (52); a plurality of columns (2) are vertically fixedly mounted on the base (1); the lifting drive (4) is mounted on the top of the columns (2); the lifting platform (3) is slidably mounted on the columns (2); the upper mold (51) is fixed on the lower surface of the lifting platform (3); the lower mold (52) is fixed on the upper part of the base (1); the lifting drive (4) is transmission-connected to the lifting platform (3) and drives the lifting platform (3) to move up and down; and the lifting drive (4) has a short-distance force application structure.

2. The battery copper pole piece stamping and forming equipment according to claim 1, characterized in that: The lifting platform (3) comprises a guide plate (31), a core column (32), and a mounting plate (33); the lifting drive (4) comprises a shell (41); the upper end of the column (2) is fixed on the outer surface of the shell (41); the interior of the shell (41) is hollowed out and the top end is closed; an annular sealing shoulder (43) is provided on the inner surface of the shell (41); the guide plate (31) is slidably mounted on the column (2); the core column (32) is fixedly mounted on the upper surface of the guide plate (31); the mounting plate (33) is fixedly mounted on the lower surface of the guide plate (31); the upper part of the core column (32) is in sliding contact with the sealing shoulder (43); the core column (32) and the sealing shoulder (43) seal the upper part of the shell (41) to form an air cavity (42); the air cavity (42) is connected to an external air source; the gas in the air cavity (42) is charged at the front part of the time period for performing the stamping operation.

3. The battery copper pole piece stamping and forming equipment according to claim 2, characterized in that: The lifting drive (4) further comprises at least two reversing elastic bodies (44), one end of the reversing elastic body (44) being hinged to the inner wall of the shell (41), and the other end of the reversing elastic body (44) being hinged to the outer surface of the core column (32), the reversing elastic bodies (44) being evenly distributed around the circumference of the axis of the core column (32), the reversing elastic bodies (44) having an elastic pre-tightening force for stretching outward, and when the core column (32) is in a middle position within a travel range, the reversing elastic bodies (44) are in a horizontal posture.

4. The battery copper pole piece stamping and forming equipment according to claim 3 is characterized by: The reversing elastic body (44) comprises a first swing rod (441), a second swing rod (442), and an elastic body (443); the first swing rod (441) and the second swing rod (442) are telescopically connected; an end of the first swing rod (441) away from the second swing rod (442) is hinged to the inner wall of the housing (41); an end of the second swing rod (442) away from the first swing rod (441) is hinged to the outer wall of the core column (32); and the elastic body (443) is inserted between the first swing rod (441) and the second swing rod (442).

5. The battery copper pole piece stamping and forming equipment according to claim 3, characterized in that: The molding device further comprises a buffer sleeve (8), wherein the buffer sleeve (8) is arranged on the upper surface of the guide plate (31) at a position where the column (2) passes through.

6. The battery copper pole piece stamping and forming equipment according to claim 3, characterized in that: The molding device further comprises an electric box (6), wherein the electric box (6) is arranged on a side of the base (1) or a side of the lifting drive (4), wherein cables extend from the electric box (6) and are connected to the mating surfaces of the upper die (51) and the lower die (52), respectively, and the copper sheet (9) to be punched placed on the lower die (52) is connected to one pole of the cable of the electric box (6), and a punching column (511) is arranged in the middle of the upper die (51), and the punching column (511) is connected to the other pole of the cable of the electric box (6).

7. The battery copper pole piece stamping and forming equipment according to claim 6, characterized in that: The copper sheet (9) is connected to the positive electrode of the power supply process of the electric box (6).

8. The battery copper pole piece stamping and forming equipment according to claim 7, characterized in that: The lower surface of the punching column (511) is hollowed out inwards to form a cone.

9. The battery copper pole piece stamping and forming equipment according to claim 7, characterized in that: The upper mold (51) is detachably mounted on the mounting plate (33), and the lower mold (52) is detachably connected to the base (1).

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