Stamping device for new energy battery steel shell machining

Abstract

The invention relates to the technical field of battery shell production equipment, in particular to a stamping device for new energy battery steel shell machining, which comprises a lower die holder and an upper die holder, a first male die, a second male die and a third male die are sequentially arranged on male dies from inside to outside, a lifting mechanism is arranged at the bottom end of the third male die, and a limiting mechanism is arranged at the bottom end of the second male die. The female die is sequentially provided with a first female die body, a second female die body and a third female die body from inside to outside, a limiting frame is fixedly installed at the top end of the upper die base, and second hydraulic telescopic rods are fixedly installed on the left side and the right side of the top end of the limiting frame. According to the stamping device for new energy battery steel shell machining, under the action of a lifting mechanism, a limiting mechanism and a second hydraulic telescopic rod, a second male die and a second female die as well as a first male die and a first female die are matched in sequence, a blank is subjected to multiple times of stamping forming, stress concentration caused by one-time stamping is avoided, opening cracking is avoided, and machining quality is improved. And the yield of products is improved.

Description

Technical Field

[0001] This invention relates to the field of battery casing production equipment technology, specifically a stamping device for processing steel casings of new energy batteries. Background Technology

[0002] With the global energy structure transformation and the trend towards cleaner and more intelligent automotive industries, new energy vehicle technology is undergoing groundbreaking innovation. As the core power source of new energy vehicles, the power battery pack adopts a revolutionary technical architecture—by integrating advanced power electronics technology, intelligent thermal management systems, and innovative structural design, it achieves significant improvements in energy density and safety performance.

[0003] Existing new energy battery packs are usually made up of a number of battery cells connected in series and parallel. These battery cells are generally 18650 or 21700 cylindrical batteries. The battery casing of these cylindrical batteries is made of nickel-plated steel and is formed by stamping. Because these cylindrical batteries have a large depth-to-diameter ratio (the ratio of stamping depth to stamping diameter), the material is subjected to large tensile deformation, which leads to stress concentration, high risk of edge cracking, and low yield.

[0004] To address the aforementioned issues, we have made improvements and proposed a stamping device for processing steel shells for new energy batteries. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: This invention provides a stamping device for processing steel shells of new energy batteries, including a lower die base and an upper die base. A die shank is fixedly installed at the top of the upper die base. Guide pillars are slidably connected to both sides of the upper die base, and the guide pillars are fixedly installed at the top of the lower die base. A punch is fixedly installed at the center of the top of the lower die base, and a die is fixedly installed at the center of the upper die base. The punches are arranged sequentially from the inside to the outside as a first punch, a second punch, and a third punch. A lifting mechanism is provided at the bottom of the third punch, and a limit mechanism is provided at the bottom of the second punch. The structure includes a first die, a second die, and a third die arranged sequentially from the inside to the outside. The top left and right sides of the first die are fixedly connected to a first connecting arm, and the top left and right sides of the second die are fixedly connected to a second connecting arm. The top of the upper die base is fixedly installed with a limit frame, and the first and second connecting arms are slidably connected to the inner side of the limit frame. The top left and right sides of the limit frame are fixedly installed with a second hydraulic telescopic rod, and the output end of the second hydraulic telescopic rod is fixedly connected to the first and second connecting arms.

[0006] As a preferred embodiment of the present invention, the bottom end of the third punch is fixedly connected to a plurality of second guide sleeves, and the interior of the second guide sleeves is slidably connected to a second guide rod, which is fixedly installed on the top end of the lower die base.

[0007] As a preferred embodiment of the present invention, the lifting mechanism includes a mounting plate, a plurality of top rods are fixedly connected to the top of the mounting plate, a connecting block is fixedly installed at the top of each of the plurality of top rods, a connecting ring is fixedly connected to the top of each of the plurality of connecting blocks, and the connecting ring is fixedly installed at the bottom of the second guide sleeve.

[0008] As a preferred embodiment of the present invention, push rods are hinged to the left and right sides of the bottom end of the mounting plate, sliders are hinged to the bottom ends of the two push rods, slide rails are slidably connected to the bottom of the two sliders, and the slide rails are fixedly installed at the bottom of the lower mold base. A first hydraulic telescopic rod is fixedly installed on the side of the slider.

[0009] As a preferred embodiment of the present invention, an extension plate is fixedly connected to the top of the connecting block, and the extension plate is disposed at the bottom of the second punch.

[0010] As a preferred embodiment of the present invention, the limiting mechanism includes a housing, which is fixedly installed inside the first punch. Multiple wedge blocks are slidably installed on the side of the housing in a circumferential array, and the ends of the wedge blocks protrude from the first punch and are disposed at the bottom end of the second punch. A fixing block is fixedly connected inside the housing, and a second spring is provided between the fixing block and the wedge blocks.

[0011] As a preferred embodiment of the present invention, an electromagnet is fixedly installed inside the housing, and the material of the wedge block at one end inside the housing is magnetic metal.

[0012] As a preferred embodiment of the present invention, a feeding plate is slidably installed between the two guide posts, and a first spring is sleeved on the outer side of the guide posts, with the top end of the first spring abutting against the feeding plate.

[0013] As a preferred embodiment of the present invention, a first guide rod is fixedly connected to each of the four corners of the top of the feeding plate, and a first guide sleeve is sleeved on the outer side of the first guide rod, and the first guide sleeve is fixedly installed inside the upper mold base.

[0014] As a preferred embodiment of the present invention, the second hydraulic telescopic rod includes a third rod body, a second rod body, and a first rod body arranged sequentially from the inside to the outside. The first rod body has a first oil inlet pipe and a second oil inlet pipe inside. The oil outlet end of the first oil inlet pipe is located between the first rod body and the second rod body. The second oil inlet pipe extends into the interior of the third rod body and is made of stainless steel and located inside the first rod body. A first solenoid valve is provided on the first oil inlet pipe, and a second solenoid valve and an overflow valve are provided on the second oil inlet pipe. The second solenoid valve and the overflow valve are located between the first rod body and the second rod body.

[0015] The beneficial effects of this invention are: A stamping device for processing steel shells of new energy batteries is disclosed. During the stamping of the battery shell, the blank is placed between the punch and the die. The hydraulic press presses down the upper die seat through the die handle. With the cooperation of the third punch and the third die, the blank is pressed into a cylindrical shape with a small depth. Then, under the action of the lifting mechanism, the limiting mechanism, and the second hydraulic telescopic rod, the second punch and the second die, and the first punch and the first die are sequentially engaged to perform multiple stampings on the blank with a certain shape. This avoids stress concentration caused by a single stamping, which could lead to cracking at the opening and improves the product yield.

[0016] A stamping device for processing steel shells of new energy batteries can push the product off the first punch when the lifting mechanism pushes the second punch and the third punch back to their original positions, thus assisting in unloading and improving work efficiency. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 2 This is a schematic diagram of the feeding plate of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 3 This is an exploded view of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 4 This invention relates to a stamping device for processing steel shells of new energy batteries. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a cross-sectional view of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 6 This is a cross-sectional view of the die of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 7This is a cross-sectional view of the punch of a stamping device for processing steel shells of new energy batteries according to the present invention; Figure 8 This invention relates to a stamping device for processing steel shells of new energy batteries. Figure 7 Enlarged view at point B in the middle; Figure 9 This is a cross-sectional view of the second hydraulic telescopic rod of a stamping device for processing steel shells of new energy batteries according to the present invention; In the diagram: 1. Lower mold base; 2. Upper mold base; 3. Mold shank; 4. Guide pillar; 5. First spring; 6. Feed plate; 7. First guide rod; 8. First guide sleeve; 9. Limiting bracket; 10. First die cavity; 11. Second die cavity; 12. Third die cavity; 13. First connecting arm; 14. Second connecting arm; 15. First punch; 16. Second punch; 17. Third punch; 18. Second guide sleeve; 19. Second guide rod; 20. Ejector pin; 21. Connecting block; 22. Extension plate; 23. Mounting plate; 24. Slide rail; 25. Slider; 26. Push rod; 27. First hydraulic telescopic rod; 28. Second hydraulic telescopic rod; 29. ​​Housing; 30. Wedge block; 31. Fixing block; 32. Second spring; 33. Electromagnet; 34. First rod body; 35. Second rod body; 36. Third rod body; 37. First oil inlet pipe; 38. Second oil inlet pipe; 39. First solenoid valve; 40. Second solenoid valve; 41. Overflow valve. Detailed Implementation

[0018] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0019] Example: Figures 1-9As shown, a stamping device for processing steel shells of new energy batteries includes a lower die base 1 and an upper die base 2. A die shank 3 is fixedly installed on the top of the upper die base 2 and is mounted on a hydraulic press. Guide posts 4 are slidably connected to both sides of the upper die base 2, and the guide posts 4 are fixedly installed on the top of the lower die base 1. A punch is fixedly installed in the middle of the top of the lower die base 1, and a die is fixedly installed in the middle of the upper die base 2. The punches are arranged sequentially from the inside to the outside as a first punch 15, a second punch 16, and a third punch 17. The third punch 17... The bottom end of the die is equipped with a lifting mechanism, and the bottom end of the second punch 16 is equipped with a limiting mechanism. The die cavity is provided with a first die 10, a second die 11, and a third die 12 sequentially from the inside out. The bottom opening of the first die 10 is chamfered, and the bottom ends of the second die 11 and the third die 12 are provided with tapered openings with an inclination angle of 30° to 45°. The top left and right sides of the first die 10 are fixedly connected to first connecting arms 13, and the top left and right sides of the second die 11 are fixedly connected to... The second connecting arm 14 has a limit frame 9 fixedly installed on the top of the upper mold base 2, and the first connecting arm 13 and the second connecting arm 14 are both slidably connected to the inner side of the limit frame 9. Second hydraulic telescopic rods 28 are fixedly installed on both the left and right sides of the top of the limit frame 9, and the output ends of the second hydraulic telescopic rods 28 are fixedly connected to the first connecting arm 13 and the second connecting arm 14. The first punch 15 and the first die 10 cooperate, the second punch 16 and the second die 11 cooperate, and the third punch 17 and the third die 12 cooperate. The relationship between the gap L1 between the first punch 15 and the first die 10, the gap L2 between the second punch 16 and the second die 11, and the gap L3 between the third punch 17 and the third die 12 is L1:L2:L3=1:(1.1~1.15):(1.25~1.35). The relationship between the outer diameter R1 of the first punch 15, the outer diameter R2 of the second punch 16, and the outer diameter R3 of the third punch 17 is R1:R2:R3=1:(1.1~1.17):(1.3~1.4). During the stamping of the battery casing, the blank is placed between the punch and the die. The hydraulic press presses down the upper die holder 2 through the die handle 3. With the cooperation of the third punch 17 and the third die 12, the blank is pressed into a cylindrical shape with a small depth ratio. Then, under the action of the lifting mechanism, the limiting mechanism, and the second hydraulic telescopic rod 28, the second punch 16 and the second die 11, the first punch 15 and the first die 10 cooperate in sequence to stamp the blank with a certain shape multiple times. This avoids stress concentration caused by a single stamping, which can lead to cracking at the opening and improves the product yield. When the second punch 16 and the third punch 17 are reset, the product can be pushed off the first punch 15 to assist in unloading. The three stampings are carried out in one position, which avoids the movement of intermediate products in space, reduces the volume of the mold, and facilitates the assembly of the mold in the factory. For battery casings with a larger depth ratio, the blank needs to be heated before stamping. The fixed stamping position reduces heat loss and prevents the temperature of the blank and intermediate products from dropping too quickly, which would affect the stamping effect.

[0020] Furthermore, such as Figure 3 and Figure 4 As shown, the bottom end of the third punch 17 is fixedly connected to a plurality of second guide sleeves 18. The second guide sleeves 18 are slidably connected to a second guide rod 19, and the second guide rod 19 is fixedly installed on the top of the lower die base 1. The up and down movement of the third punch 17 is restricted by the second guide rod 19 and the second guide sleeves 18, making the movement of the third punch 17 more stable.

[0021] Specifically, such as Figure 5 and Figure 7 As shown, the lifting mechanism includes a mounting plate 23. Multiple push rods 20 are fixedly connected to the top of the mounting plate 23. Connecting blocks 21 are fixedly installed at the top of each push rod 20. Connecting rings are fixedly connected to the top of each connecting block 21, and these connecting rings are fixedly installed at the bottom of the second guide sleeve 18. Push rods 26 are hinged to the left and right sides of the bottom of the mounting plate 23. The push rods 26 are Y-shaped to increase the stability between the push rods 26 and the mounting plate 23. Slider blocks 25 are hinged to the bottom of each of the two push rods 26. Slide rails 24 are slidably connected to the bottom of each of the two sliders 25, and the slide rails 24 are fixedly installed at the bottom of the lower mold base 1. The sides of the sliders 25 are fixedly installed... There is a first hydraulic telescopic rod 27, which is connected to the hydraulic equipment. The operation of the first hydraulic telescopic rod 27 drives the slider 25 to move on the slide rail 24. The moving slider 25 changes the tilt of the push rod 26 in the vertical direction, thereby causing the mounting plate 23 and the push rod 20 to rise and fall in the vertical direction. This, in turn, drives the third punch 17 to move up and down through the connecting block 21, so that the third punch 17 is reset or sinks. When the lifting mechanism drives the third punch 17 to sink for the first time, the third punch 17 does not touch the bottom. When the second punch 16 sinks, the third punch 17 sinks a second time to assist the second punch 16 in unloading the intermediate product.

[0022] Furthermore, such as Figure 4 As shown, the top of the connecting block 21 is fixedly connected to the extension plate 22, and the extension plate 22 is located at the bottom of the second punch 16. The extension plate 22 is located below the second punch 16, and drives the second punch 16 to reset during the reset process of the third punch 17.

[0023] Specifically, such as Figure 7 and Figure 8 As shown, the limiting mechanism includes a housing 29, which is fixedly installed inside the first punch 15. Multiple wedge blocks 30 are slidably mounted on the side of the housing 29 in a circumferential array. The ends of the wedge blocks 30 protrude from the first punch 15 and are positioned at the bottom of the second punch 16. The inclined surfaces of the wedge blocks 30 are located at the bottom. A fixing block 31 is fixedly connected inside the housing 29, and a second spring 32 is provided between the fixing block 31 and the wedge blocks 30. An electromagnet 33 is fixedly installed inside the housing 29, and one end of the wedge block 30 located inside the housing 29 is made of magnetic metal. When the electromagnet 33 operates, it moves the wedge block 30 made of magnetic metal... The end of block 30 is attracted to the center of housing 29, thereby causing the end of wedge block 30 to be retracted into the interior of first punch 15, leaving the bottom of second punch 16 unsupported, causing second punch 16 to fall, exposing the stamping part of first punch 15, and then performing a final stamping action. When the bottom of second punch 16 descends to the bottommost position, the top of second punch 16 coincides with wedge block 30, so that wedge block 30 is always retracted into first punch 15. When second punch 16 is reset, under the action of second spring 32, wedge block 30 is pushed out of first punch 15 again, and second punch 16 is supported and restricted again.

[0024] Preferred, such as Figure 1 and Figure 2 As shown, a feeding plate 6 is slidably installed between two guide pillars 4. A first spring 5 is sleeved on the outside of the guide pillars 4, and the top of the first spring 5 abuts against the feeding plate 6. A first guide rod 7 is fixedly connected to each of the four corners of the top of the feeding plate 6. A first guide sleeve 8 is sleeved on the outside of the first guide rod 7, and the first guide sleeve 8 is fixedly installed inside the upper die base 2. The blank is placed on the feeding plate 6, keeping the center of the punch, the blank and the die on the same straight line. When the upper die base 2 performs a downward stamping operation, it pushes the feeding plate 6 to move downward along the guide pillars 4 until the blank contacts the punch. Then the feeding plate 6 continues to move downward, and the die cooperates with the punch to stamp the blank. The first guide rod 7 and the first guide sleeve 8 are set between the feeding plate 6 and the upper die base 2 to keep the center of the feeding plate 6 and the upper die base 2 on the same straight line.

[0025] For details, please refer to Figure 9The second hydraulic telescopic rod 28 includes a third rod body 36, a second rod body 35, and a first rod body 34 arranged sequentially from the inside to the outside. The first rod body 34 has a first oil inlet pipe 37 and a second oil inlet pipe 38 inside. The oil outlet of the first oil inlet pipe 37 is located between the first rod body 34 and the second rod body 35. The second oil inlet pipe 38 extends into the interior of the third rod body 36 and is made of stainless steel on the inner side of the first rod body 34. A first solenoid valve 39 is installed on the first oil inlet pipe 37, and a second solenoid valve 40 and an overflow valve 41 are installed on the second oil inlet pipe 38. The second solenoid valve 40 and the overflow valve 41 are located between the first rod body 34 and the second rod body 35. The second hydraulic telescopic rod 28 is connected to a hydraulic device and is responsible for pushing the first die 10 and the second die 11 respectively. During the stamping operation, the second die 11 sinks first, and then after the second stamping is completed, the first die 10 sinks again. Therefore, the stamping... When the second solenoid valve 40 is opened, hydraulic oil first enters from the second inlet pipe 38 between the second rod 35 and the third rod 36, pushing the third rod 36 out. This causes the second die 11 to descend and overlap with the third die 12. After the second stamping is completed, the first solenoid valve 39 and the second solenoid valve 40 are opened, and hydraulic oil enters from the first inlet pipe 37 between the first rod 34 and the second rod 35. Since the third rod 36 has reached the bottom, when the second rod 35 is pushed out of the first rod 34, the third rod 36 retracts into the second rod 35. The pressure between the second rod 35 and the third rod 36 increases, and the hydraulic oil between the second rod 35 and the third rod 36 flows from the overflow valve 41 into the space between the first rod 34 and the second rod 35, accelerating the installation process of the first die 10. When the first die 10 and the second die 11 are reset, the first solenoid valve 39 is opened, and hydraulic oil enters from the end of the first rod 34 away from the first inlet pipe 37, resetting it.

[0026] Working principle: The blank is placed on the feeding plate 6, keeping the center of the punch, blank and die on the same straight line. When the upper die holder 2 performs the stamping operation downward, it pushes the feeding plate 6 to move downward along the guide post 4 until the blank contacts the punch. Then the feeding plate 6 continues to move downward. The third die 12 cooperates with the third punch 17 to press the blank into a cylindrical shape with a small deep drawing ratio. Then the upper die holder 2 is reset upward under the action of the hydraulic press. The first hydraulic telescopic rod 27 drives the slider 25 to move outward on the slide rail 24. The moving slider 25 lowers the height of the top of the push rod 26, thereby lowering the vertical height of the mounting plate 23 and the push rod 20. This, in turn, drives the third punch 17 to move downward through the connecting block 21, causing the third punch 17 to sink and expose the second punch 16. At this time, the second hydraulic telescopic rod 28 works, opening the second solenoid valve 40. Hydraulic oil first enters from the second oil inlet pipe 38 between the second rod body 35 and the third rod body 36, pushing out the third rod body 36. This causes the second die 11 to descend and overlap with the third die 12. The hydraulic press then causes the upper die seat 2 to descend again. The second punch 16 and the second die 11 work together to stamp and stretch the product that was stamped last time. Then, the upper die seat 2 returns to its original position under the action of the hydraulic press. When electromagnet 33 operates, it attracts the end of the wedge-shaped block 30, made of magnetic metal, towards the center of housing 29, thereby causing the end of the wedge-shaped block 30 to retract into the interior of the first punch 15. This leaves the bottom of the second punch 16 unsupported. The lifting mechanism continues to pull the third punch 17 downward, causing the second punch 16 to separate from the intermediate product until the second punch 16 slides down to the bottom of the first punch 15, exposing the first punch 15. At the same time, the first solenoid valve 39 and the second solenoid valve 40 are opened, and hydraulic oil enters the first rod body 34 and... Between the second rod 35, since the third rod 36 has reached the bottom, when the second rod 35 is pushed out of the first rod 34, the third rod 36 retracts into the second rod 35, the pressure between the second rod 35 and the third rod 36 increases, and the hydraulic oil between the second rod 35 and the third rod 36 flows from the overflow valve 41 into the space between the first rod 34 and the second rod 35, so that the first die 10 is installed. The hydraulic press then moves the upper die seat 2 downward again, and the first die 10 and the first punch 15 cooperate to perform the final stamping of the product; After stamping, the product remains on the first punch 15. The lifting structure lifts the third punch 17, and under the action of the extension plate 22, the second punch 16 returns to its original position. The second hydraulic telescopic rod 28 then resets the first die 10 and the second die 11 to allow for the stamping of the next battery case.

[0027] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A stamping device for processing steel shells of new energy batteries, comprising a lower die base (1) and an upper die base (2), characterized in that, A mold handle (3) is fixedly installed at the top of the upper mold base (2). Guide posts (4) are slidably connected to both the left and right sides of the upper mold base (2), and the guide posts (4) are fixedly installed at the top of the lower mold base (1). A punch is fixedly installed at the middle of the top of the lower mold base (1), and a die is fixedly installed at the middle of the upper mold base (2). The punch is arranged from the inside to the outside as a first punch (15), a second punch (16), and a third punch (17). A lifting mechanism is provided at the bottom of the third punch (17), and a limiting mechanism is provided at the bottom of the second punch (16). The die is arranged from the inside to the outside as a first die (10), a second die (16), a third die (17), and a fourth die (17). The first die (10) has a first connecting arm (13) fixedly connected to the top left and right sides of the first die (10), and a second connecting arm (14) fixedly connected to the top left and right sides of the second die (11). The top of the upper die base (2) is fixedly installed with a limit frame (9), and the first connecting arm (13) and the second connecting arm (14) are slidably connected to the inner side of the limit frame (9). The top left and right sides of the limit frame (9) are fixedly installed with a second hydraulic telescopic rod (28), and the output end of the second hydraulic telescopic rod (28) is fixedly connected to the first connecting arm (13) and the second connecting arm (14).

2. The stamping device for processing steel shells of new energy batteries according to claim 1, characterized in that, The bottom end of the third punch (17) is fixedly connected to a plurality of second guide sleeves (18), and the interior of the second guide sleeves (18) is slidably connected to a second guide rod (19), and the second guide rod (19) is fixedly installed on the top of the lower die base (1).

3. The stamping device for processing steel shells of new energy batteries according to claim 1, characterized in that, The lifting mechanism includes a mounting plate (23), with a plurality of top rods (20) fixedly connected to the top of the mounting plate (23). Each of the top rods (20) has a connecting block (21) fixedly installed at its top. Each of the connecting blocks (21) has a connecting ring fixedly connected to its top, and the connecting ring is fixedly installed at the bottom of the second guide sleeve (18).

4. The stamping device for processing steel shells of new energy batteries according to claim 3, characterized in that, Push rods (26) are hinged to the bottom left and right sides of the mounting plate (23). Slider (25) is hinged to the bottom of each of the two push rods (26). Slide rails (24) are slidably connected to the bottom of each of the two sliders (25). The slide rails (24) are fixedly installed at the bottom of the lower mold base (1). A first hydraulic telescopic rod (27) is fixedly installed on the side of the slider (25).

5. A stamping device for processing steel shells of new energy batteries according to claim 3, characterized in that, The top end of the connecting block (21) is fixedly connected to an extension plate (22), and the extension plate (22) is located at the bottom end of the second punch (16).

6. The stamping device for processing steel shells of new energy batteries according to claim 1, characterized in that, The limiting mechanism includes a housing (29), which is fixedly installed inside the first punch (15). Multiple wedge blocks (30) are slidably installed on the side of the housing (29) in a circumferential array. The ends of the wedge blocks (30) protrude from the first punch (15) and are located at the bottom of the second punch (16). A fixing block (31) is fixedly connected inside the housing (29), and a second spring (32) is provided between the fixing block (31) and the wedge blocks (30).

7. A stamping device for processing steel shells of new energy batteries according to claim 6, characterized in that, An electromagnet (33) is fixedly installed inside the housing (29), and the material of the wedge block (30) at one end inside the housing (29) is magnetic metal.

8. A stamping device for processing steel shells of new energy batteries according to claim 1, characterized in that, A feeding plate (6) is slidably installed between the two guide posts (4). A first spring (5) is sleeved on the outside of the guide posts (4), and the top of the first spring (5) abuts against the feeding plate (6).

9. A stamping device for processing steel shells of new energy batteries according to claim 8, characterized in that, The top four corners of the feeding plate (6) are fixedly connected with first guide rods (7), and the outer side of the first guide rods (7) is fitted with first guide sleeves (8), and the first guide sleeves (8) are fixedly installed inside the upper mold base (2).

10. A stamping device for processing steel shells of new energy batteries according to claim 1, characterized in that, The second hydraulic telescopic rod (28) includes a third rod body (36), a second rod body (35), and a first rod body (34) arranged sequentially from the inside to the outside. The first rod body (34) is provided with a first oil inlet pipe (37) and a second oil inlet pipe (38). The oil outlet end of the first oil inlet pipe (37) is located between the first rod body (34) and the second rod body (35). The second oil inlet pipe (38) extends into the interior of the third rod body (36), and the material of the second oil inlet pipe (38) is stainless steel located inside the first rod body (34). A first solenoid valve (39) is provided on the first oil inlet pipe (37), and a second solenoid valve (40) and an overflow valve (41) are provided on the second oil inlet pipe (38). The second solenoid valve (40) and the overflow valve (41) are located between the first rod body (34) and the second rod body (35).

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