Stamping equipment special for stretching battery shell

Abstract

The utility model provides special stamping equipment for stretching a battery case, which comprises a plurality of stations, an upper template and a lower template are arranged on the stations, a male die is arranged on the upper template, a female die is arranged in the lower template, the male die and the female die are matched to form a battery case, a spraying water pipe is arranged on the lower template and comprises a main pipe and a branch pipe which are communicated with each other, and the main pipe and the branch pipe are communicated with each other. The main pipe is connected with an external water source, the branch pipes are distributed at intervals in the length direction of the main pipe, pipe openings of the branch pipes face the lower die plates of the adjacent stations, mist nozzles are arranged on the pipe openings, through mist spraying, heat between the stations can be well absorbed, the temperature between the stations can be controlled, the workpiece punch forming quality is guaranteed, and good practicability is achieved.

Description

Technical Field

[0001] This utility model relates to the field of battery casing stretching and stamping technology, and more specifically, to a special stamping equipment for stretching battery casings. Background Technology

[0002] Battery casing stretching and stamping equipment uses multiple stations to collaboratively complete the continuous stamping forming of battery casings. It progressively stretches metal sheets (such as aluminum, steel, or nickel alloys) into thin-walled battery casings of specific shapes. This stamping equipment guides the material to flow evenly and thin out during the stretching process, avoiding excessive thinning, cracking, or wrinkling caused by single stretching. To continuously complete the stretching process, the stations are usually arranged in a straight line or ring in a production line, with stations relatively close together. The drawback is that the heat generated varies depending on the pressure applied to the material, leading to a continuous increase in mold temperature at each station during continuous stamping. Furthermore, the heat from different stations can influence each other, affecting not only the material's fluidity but also the quality of the stamping. Existing technologies typically include cooling water channels within the molds, but cooling between stations still relies on manual water spraying. Therefore, a dedicated battery casing stretching and stamping equipment is proposed. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To solve the above problems, this utility model provides a special stamping equipment for stretching battery shells. A main tube and branch tubes are set on the lower template, and the branch tubes are spaced apart on the main tube so that the branch tubes are evenly distributed on both sides of the lower template. The mist nozzles of the branch tube openings face the adjacent lower template to facilitate the absorption of heat between workstations.

[0005] (II) Technical Solution

[0006] A special stamping equipment for stretching battery casings includes several stations. Each station is equipped with an upper template and a lower template. The upper template is equipped with a punch, and the lower template is equipped with a die. The punch and die work together to stamp out the battery casing. A spray water pipe is installed on the lower template. The spray water pipe includes a main pipe and branch pipes that are interconnected. The main pipe is connected to an external water source, and the branch pipes are distributed at intervals along the length of the main pipe. The openings of the branch pipes face the lower templates of adjacent stations, and the openings are equipped with mist nozzles.

[0007] Furthermore, the mist nozzle includes a housing, a water outlet pipe inside the housing, and a mist outlet. The water outlet pipe includes a first port and a second port. The first port is located inside the mist outlet and is equipped with a mist plate. The second port is located inside a branch pipe. The mist plate is equipped with mist holes, which are connected to the first port. The mist plate is equipped with a piezoelectric transducer, which is used to generate mist by causing water to vibrate at high frequency.

[0008] Furthermore, the piezoelectric transducer includes a piezoelectric ceramic sheet and a drive board. The piezoelectric ceramic sheet is provided with a positive metal coating and a negative metal coating. A wire is spot-welded to each of the positive and negative metal coatings, and the wires are all connected to the drive board.

[0009] Furthermore, the misting plate includes a bent section and a middle section, with misting holes located in the middle section, and the bent section surrounding the middle section in a trumpet shape.

[0010] Furthermore, the outer edge of the bent part is sealed to the edge of the mist outlet, and the inner edge of the bent part is sealed to the edge of the first pipe opening. A sealing plate is provided inside the outer shell, and the sealing plate has a sealing port for the water outlet pipe to pass through. A sealed cavity is formed between the mist plate and the sealing plate, and a piezoelectric ceramic plate is placed in the sealed cavity and attached to the mist plate.

[0011] Furthermore, the lower template has a movable cavity, a guide rod is vertically placed inside the movable cavity, a first spring is sleeved on the outside of the guide rod, a die is movably arranged inside the movable cavity, the die has a guide hole, a guide rod is movably arranged inside the guide hole, and the diameter of the first spring is larger than the guide hole, so that the end of the first spring abuts against the die.

[0012] Furthermore, the punch is provided with an abutment rod, the end of which is aligned with the end face of the die.

[0013] Furthermore, the movable cavity is provided with lubricating oil, the bottom of the die is provided with a movable groove, a top plate is movably installed in the movable groove, the top plate is provided with a telescopic component, a second spring is provided in the movable cavity, the second spring is sleeved on the outside of the telescopic component, when the top plate is pushed upward from the movable groove by the second spring, the lubricating oil enters the cavity of the die from the movable groove.

[0014] Furthermore, an abutment plate is provided inside the movable groove, and the abutment plate is located below the top plate.

[0015] Furthermore, the telescopic component includes an outer tube and an inner tube. The inner tube is movably disposed inside the outer tube. The outer tube has a constricted end, and the inner tube has a flared end. The maximum outer diameter of the flared end is equal to or greater than the minimum inner diameter of the constricted end, so that the inner tube is confined inside the outer tube.

[0016] (III) Beneficial Effects

[0017] This utility model provides a special stamping equipment for stretching battery casings. A spray water pipe including a main pipe and branch pipes is set in the lower template. A mist nozzle is set on the pipe opening of the branch pipe to achieve heat dissipation between workstations. The spray water pipe is set in the lower template to reduce the space occupied by the assembly spray pipe. The implementation of this equipment also effectively reduces the use of manpower. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the lower template and the die in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the spray pipe in this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the mist nozzle in this utility model (I);

[0022] Figure 5 This is a schematic diagram (II) of the structure of the mist nozzle in this utility model;

[0023] Figure 6 This is a schematic diagram of the structure of the medium-voltage electric transducer of this utility model;

[0024] Figure 7 for Figure 2 Sectional view at point aa;

[0025] Figure 8 This is a front view of the telescopic component in this utility model;

[0026] Figure 9 for Figure 7 Enlarged view of point b (before the top plate is ejected);

[0027] Figure 10 This is a diagram showing the state of the top plate during ejection.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. Lower template; 2. Upper template; 3. Punch; 4. Die; 5. Abutment rod; 6. Mist nozzle; 7. Main pipe; 8. Branch pipe; 9. Connecting pipe; 10. Outer shell; 11. Mist outlet; 12. Water outlet pipe; 13. Middle section; 14. Bending section; 15. Mist plate; 16. Second pipe opening; 17. Sealing plate; 18. Sealing ring; 19. Piezoelectric ceramic plate; 20. Wire; 21. Guide rod; 22. First spring; 23. Inner tube; 24. Outer tube; 25. Second spring; 26. Movable cavity; 27. Flared end; 28. Shrinking end; 29. ​​Top plate; 30. Movable groove; 31. Abutment plate. Detailed Implementation

[0030] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0031] See Figures 1 to 10A special stamping equipment for stretching battery casings includes several workstations. Each workstation has an upper template 2 and a lower template 1. The upper template 2 has a punch 3, and the lower template 1 has a die 4. The punch 3 and die 4 cooperate to stamp out the battery casing. A spray water pipe is installed inside the lower template 1. The spray water pipe includes a main pipe 7 and branch pipes 8 that are interconnected. External water source enters the branch pipes 8 from the main pipe 7 through the longitudinally and transversely connected main pipe 7. To introduce external water, a water pump and a solenoid valve can also be installed on the main pipe 7. The solenoid valve controls the opening and closing of the water pump for convenient water intake control. The branch pipes 8 are spaced apart along the length of the main pipe 7, with the openings of the branch pipes 8 facing the lower template 1 of the adjacent workstation. A mist nozzle 6 is threaded onto the opening of the branch pipe. The mist nozzle 6 atomizes the water. This atomized water effectively absorbs heat, allowing the heat between workstations to be reduced in a timely manner, thereby ensuring that the quality of the battery casing is not affected by heat during continuous stamping.

[0032] The mist nozzle 6 includes a housing 10, within which a water outlet pipe 12 and a misting plate 15 are disposed. The housing 10 has a mist outlet 11. The water outlet pipe 12 includes a first port and a second port 16. The first port is disposed within the mist outlet 11. The misting plate 15 includes a bent portion 14 and a middle portion 13. A misting hole is disposed in the middle portion 13, which is fixedly disposed in the first port. The bent portion 14 surrounds the middle portion 13 in a trumpet shape, and the edge of the bent portion 14 is sealed to the edge of the mist outlet 11. The produced mist, guided by the bent portion 14, flows from the mist outlet 11 to an adjacent workstation. The second port 16 is disposed within a branch pipe 8 and is used to introduce water from the branch pipe 8 into the water outlet pipe 12.

[0033] The misting plate 15 is equipped with a piezoelectric transducer, which includes a piezoelectric ceramic plate 19, which is attached to the misting plate 15. The piezoelectric ceramic plate 19 has a positive electrode metal coating and a negative electrode metal coating. The positive electrode metal coating and the negative electrode metal coating are respectively spot-welded with wires 20. The wires 20 are connected to a drive board. The drive board boosts the low voltage to a high voltage, for example, from 5V to 70V, generating a frequency of about 110 kHz. The piezoelectric ceramic plate 19 drives the misting plate 15 to vibrate at a high frequency, causing the water in the first opening to generate mist. The water permeates out of the misting hole under the action of inertia.

[0034] The outer casing 10 has a sealing plate 17 with a sealing port for the water outlet pipe 12 to pass through. A sealing ring 18 is provided between the sealing port and the water outlet pipe 12 to fill the gap. The bent part 14 of the mist plate 15 and the sealing plate 17 form a sealed cavity inside the outer casing 10. The piezoelectric ceramic plate 19 is placed in the sealed cavity to prevent the welded joint of the wire 20 from coming into contact with water and short-circuiting or oxidizing, thereby burning out the drive circuit and the piezoelectric ceramic plate 19. The wire 20 passes through the inner part of the outer casing 10 and connects to the outer drive plate. The lower template 1 has a movable cavity 26. A guide rod 21 is vertically arranged in the movable cavity 26. A first spring 22 is sleeved on the outside of the guide rod 21. A concave mold 4 is movably arranged in the movable cavity 26. The concave mold 4 has a guide hole. The guide rod 21 is movably arranged in the guide hole. The diameter of the first spring 22 is larger than the guide hole, so that the end of the first spring 22 abuts against the concave mold 4. When the punch 3 is pressing and stretching, the die 4 moves downward with the punching force of the punch 3. The first spring 22 is compressed as the die 4 is pressed down. The first spring 22 abuts against the die 4, avoiding direct collision between the die 4 and the lower template 1, and reducing rigidity loss. The punch 3 is provided with an abutment rod 5, the end of which is aligned with the end face of the die 4, so that the punch 3 and the die 4 can be pressed together better.

[0035] The movable cavity 26 is provided with lubricating oil, and the bottom of the die 4 is provided with a movable groove 30. The movable groove 30 is provided with an abutment plate 31, which is located below the top plate 29. The top plate 29 is movably installed in the movable groove 30, and the abutment plate 31 restricts the top plate 29 to the lowest position in the movable groove 30.

[0036] A telescopic component is provided between the top plate 29 and the lower template 1. The telescopic component includes an outer sleeve 24 and an inner tube 23. The inner tube 23 is movably disposed inside the outer sleeve 24. The outer sleeve 24 has a constricted end 28. The other end of the outer sleeve 24 away from the constricted end 28 is fixed to the lower template 1. The inner tube 23 has a flared end 27. The other end of the inner tube 23 away from the flared end 27 is fixed to the top plate 29. The maximum outer diameter of the flared end 27 of the inner sleeve is equal to or greater than the minimum inner diameter of the constricted end 28 of the outer sleeve 24, and smaller than the inner diameter of other parts of the outer sleeve 24, so as to prevent the inner tube 23 from coming out of the outer sleeve 24 when it moves inside the outer sleeve 24.

[0037] A second spring 25 is fixedly installed inside the movable cavity 26. The second spring 25 is sleeved on the outside of the outer sleeve 24. When the punch 3 gradually presses the battery shell material into the die 4, the inner tube 23 retracts, and the second spring 25 gradually begins to compress. When the punch 3 retracts from the die 4, space gradually appears at the bottom of the die 4, and the second spring 25 pushes out the top plate 29. The top plate 29 acts on the battery shell, preventing the battery shell from sticking to the die 4. At the same time, lubricating oil enters the cavity of the die 4 from the movable groove 30, which not only reduces heat but also prepares for the next stretching. This utility model only sets one second spring 25, but the elastic strength of the second spring 25 can be controlled by setting multiple second springs 25 or controlling the manufacturing process of the second spring 25, so that the ejection of the top plate 29 is earlier than the return of the die 4, and thus the top plate 29 can be pushed out from the movable groove 30. The specific adjustment needs to be made according to the actual situation.

[0038] The main pipe 7 is also equipped with a connecting pipe 9, which can connect to the cooling water circuit inside the lower template 1, thereby connecting the water circuit inside the spray water pipe and the cooling water circuit, reducing the number of water access channels for better management.

[0039] While the disclosure is as stated above, its scope of protection is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A battery shell stretching special punching device, comprising a plurality of work stations, an upper die plate (2) and a lower die plate (1) are arranged on the work stations, a male die (3) is arranged on the upper die plate (2), a female die (4) is arranged in the lower die plate (1), the male die (3) and the female die (4) cooperate to punch out a battery shell body, characterized in that, Spray water pipes are provided on the lower template (1). The spray water pipes include a main pipe (7) and branch pipes (8) that are interconnected. The main pipe (7) is connected to an external water source. The branch pipes (8) are distributed at intervals along the length of the main pipe (7). The openings of the branch pipes (8) face the lower template (1) of the adjacent workstation. The openings of the branch pipes (8) are provided with mist nozzles (6).

2. The battery casing stretching stamping equipment according to claim 1, characterized in that, The mist nozzle (6) includes a housing (10), a water outlet pipe (12) is provided inside the housing (10), and a mist outlet (11) is provided inside the housing (10). The water outlet pipe (12) includes a first port and a second port (16). The first port is located inside the mist outlet (11). A mist plate (15) is provided at the first port. The second port (16) is located inside the branch pipe (8). The mist plate (15) is provided with a mist hole. The mist hole is connected to the first port. The mist plate (15) is provided with a piezoelectric transducer. The piezoelectric transducer is used to generate mist by causing water to vibrate at high frequency.

3. The battery casing stretching stamping equipment according to claim 2, characterized in that, The piezoelectric transducer includes a piezoelectric ceramic sheet (19) and a drive plate. The piezoelectric ceramic sheet (19) is provided with a positive metal coating and a negative metal coating. A wire (20) is spot-welded to the positive metal coating and the negative metal coating respectively. The wires (20) are all connected to the drive plate.

4. The battery casing stretching stamping equipment according to claim 3, characterized in that, The mist plate (15) includes a bent portion (14) and a middle portion (13), the mist hole is disposed in the middle portion (13), and the bent portion (14) surrounds the middle portion (13) in a trumpet shape.

5. The battery casing stretching stamping equipment according to claim 4, characterized in that, The edge of the bent part (14) and the edge of the mist outlet (11) are sealed together. A sealing plate (17) is provided inside the outer shell (10). The sealing plate (17) is provided with a sealing port for passing through the water outlet pipe (12). A sealed cavity is formed between the mist plate (15) and the sealing plate (17). The piezoelectric ceramic plate (19) is disposed in the sealed cavity and is attached to the mist plate (15).

6. The battery casing stretching stamping equipment according to claim 1, characterized in that, The lower template (1) is provided with a movable cavity (26), and a guide rod (21) is vertically arranged inside the movable cavity (26). A first spring (22) is sleeved on the outside of the guide rod (21). The cavity (4) is movably arranged inside the movable cavity (26). The cavity (4) is provided with a guide hole. The guide rod (21) is movably arranged inside the guide hole. The diameter of the first spring (22) is larger than that of the guide hole, so that the end of the first spring (22) abuts against the cavity (4).

7. A special stamping equipment for stretching battery casings according to claim 6, characterized in that, The punch (3) is provided with an abutment rod (5), and the end of the abutment rod (5) is aligned with the end face of the die (4).

8. A special stamping equipment for stretching battery casings according to claim 6, characterized in that, The movable cavity (26) is provided with lubricating oil, and the bottom of the die (4) is provided with a movable groove (30). A top plate (29) is movably arranged in the movable groove (30). The top plate (29) is provided with a telescopic component. A second spring (25) is provided in the movable cavity (26). The second spring (25) is sleeved on the outside of the telescopic component. When the top plate (29) is pushed upward from the movable groove (30) by the second spring (25), the lubricating oil enters the cavity of the die (4) from the movable groove (30).

9. A special stamping equipment for stretching battery casings according to claim 8, characterized in that, The movable groove (30) is provided with an abutment plate (31), which is located below the top plate (29).

10. A special stamping equipment for stretching battery casings according to claim 8, characterized in that, The telescopic component includes an outer tube (24) and an inner tube (23). The inner tube (23) is movably disposed inside the outer tube (24). The outer tube (24) has a constricted end (28), and the inner tube (23) has a flared end (27). The maximum outer diameter of the flared end (27) is equal to or greater than the minimum inner diameter of the constricted end (28), so that the inner tube (23) is confined inside the outer tube (24).

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