Punching forming die for battery shell

Abstract

The utility model discloses a punching forming die for a battery case. The punching forming die comprises an upper die body, a lower die body, a male die, a female die, a punch, a discharging sleeve, a jacking sleeve, a punching block, a discharging pneumatic component, a jacking pneumatic component and a punching pneumatic component. The male die is connected to the lower end of the upper die body, the female die and the punch are connected to the upper end of the lower die body, the female die surrounds the outer side of the punch, a material belt is used for penetrating through the position between the male die and the female die, an upper die cavity is formed in the male die, a lower die cavity is formed between the punch and the female die, and the upper die cavity is communicated with the lower die cavity. The stamping block is arranged in the upper die cavity in the vertical direction in a sliding mode. According to the utility model, a material strip can be punched to obtain a material sheet through one-time punching, and the material sheet can be subjected to preliminary punching forming to obtain a preliminarily-formed battery shell, so that the production efficiency of preliminary forming of the battery shell can be improved, the processing cost of preliminary forming of the battery shell can be reduced, and the investment cost of a mold can be reduced.

Description

Technical Field

[0001] This utility model relates to a punching and forming mold for battery casings. Background Technology

[0002] Currently, the production process of aluminum battery casings requires two sets of dies: a slitting die to cut aluminum strips into sheets, which are then fed into a stamping die for initial stamping to obtain a preliminary battery casing. For example, Chinese patent CN213728809U discloses a slitting die for power battery casing sheets, and Chinese patent CN221453973U discloses a stamping die for producing lithium battery casings. However, after the slitting die cuts the strip into sheets, the sheets need to undergo collection, stacking, transfer, and loading before being fed into the stamping die for initial stamping. This process is cumbersome, time-consuming, and labor-intensive. Therefore, using two sets of dies to complete the initial forming of the battery casing is not only inefficient but also increases production costs due to the complex process and the cost of the dies themselves, presenting numerous shortcomings. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a punching and forming die for battery casing. It can punch and form a strip of material to obtain a sheet material in one punching operation, and can also perform preliminary punching and forming of the sheet material to obtain a preliminary formed battery casing. It can improve the production efficiency of preliminary forming of battery casing, reduce the processing cost of preliminary forming of battery casing, and also reduce the cost of die investment.

[0004] To solve the above-mentioned technical problems, the technical solution of this utility model is: a punching and forming mold for battery casing, including an upper mold body, a lower mold body, a punch, a die, a punch head, a discharge sleeve, a top pressing sleeve, a stamping block, a discharge pneumatic component, a top pressing pneumatic component, and a stamping pneumatic component.

[0005] The punch is connected to the lower end of the upper die body, the die and the punch are respectively connected to the upper end of the lower die body and the die surrounds the outside of the punch, and the strip is used to pass through between the punch and the die;

[0006] The punch has an upper cavity, and the die has a lower cavity between the punch and the die.

[0007] The stamping block is slidably disposed in the upper mold cavity in the vertical direction;

[0008] The stamping pneumatic component is connected to the upper die body and is used to apply a downward thrust to the stamping block;

[0009] Both the discharge sleeve and the top pressing sleeve are slidably disposed in the lower mold cavity in the vertical direction. The discharge sleeve is slidably sleeved on the punch and slidably fitted inside the top pressing sleeve.

[0010] The top-pressing pneumatic component is connected in the lower die body and is used to apply an upward thrust to the top-pressing sleeve to drive the top-pressing sleeve to slide upward to press against the lower surface of the strip.

[0011] The discharge pneumatic component is connected in the lower mold body and is used to apply an upward thrust to the discharge sleeve to drive the discharge sleeve to slide upward into place;

[0012] The punch is used to extend into the lower die cavity when the upper die body and the lower die body are closed, and to punch the strip to obtain a sheet by cooperating with the inner periphery of the die through the outer periphery of the punch. The punch is also used to drive the top pressure sleeve and the discharge sleeve to move downward against the thrust of the top pressure pneumatic component and the discharge pneumatic component.

[0013] The punch is used to extend into the upper mold cavity when the upper mold body and the lower mold body are closed, and to press the sheet into a battery case by cooperating with the inner circumference of the punch and the punch. The stamping pneumatic component is used to drive the stamping block to press the upper surface of the battery case to press the battery case onto the punch.

[0014] The upper end of the discharge sleeve is also used to press against the lower end of the battery case during mold separation to push the battery case upward.

[0015] Furthermore, the die for forming the battery casing also includes a pressure ring and a pressure pneumatic component;

[0016] The pressure ring is slidably connected to the upper die body in the vertical direction and surrounds the outside of the punch;

[0017] The pressure pneumatic component is connected to the upper mold body and is used to apply a downward thrust to the pressure ring. The pressure pneumatic component is used to drive the pressure ring to press and fix the material strip on the upper end of the die when the upper mold body and the lower mold body are closed.

[0018] Furthermore, the lower mold body is provided with a limiting step;

[0019] The lower end of the top pressure sleeve is provided with a first step portion that protrudes radially outward. The first step portion is used to abut against the limiting step when the top pressure pneumatic component drives the top pressure sleeve to slide upward into place, thereby limiting the position of the top pressure sleeve.

[0020] Furthermore, the lower end of the discharge sleeve is provided with a second step portion that protrudes radially outward. The second step portion is used to abut against the lower end face of the pressing sleeve to limit the position of the discharge sleeve.

[0021] Furthermore, the top-pressure pneumatic component includes a top-pressure cylinder liner, a top-pressure piston, and at least one top-pressure rod;

[0022] The top pressure cylinder liner is installed in the lower mold body;

[0023] The top-pressure piston is slidably connected in the top-pressure cylinder liner, and the top-pressure cylinder liner is provided with a first pressurization chamber located below the top-pressure piston;

[0024] The top pressure rod is slidably connected in the lower mold body in the vertical direction. The upper end of the top pressure rod abuts against the lower end face of the top pressure sleeve, and the lower end of the top pressure rod abuts against the upper end face of the top pressure piston.

[0025] The lower mold body is provided with a first pressurization channel that communicates with the first pressurization chamber and is used to inject pressurized gas into the first pressurization chamber.

[0026] Furthermore, the discharge pneumatic component includes at least one pneumatic module, which includes a discharge cylinder liner, a discharge piston, and a discharge rod;

[0027] The discharge cylinder sleeve is installed inside the top pressure cylinder sleeve, and the lower end of the discharge cylinder sleeve is connected to the lower mold body;

[0028] The top-pressure piston is provided with sliding holes that correspond one-to-one with the discharge cylinder sleeves, and the discharge cylinder sleeves are sealed and slidably connected to the corresponding sliding holes.

[0029] The discharge piston is slidably fitted in the discharge cylinder sleeve, and the discharge cylinder sleeve is provided with a second pressurizing chamber located below the discharge piston. The lower end of the discharge cylinder sleeve is provided with a communicating hole that communicates with the second pressurizing chamber.

[0030] The discharge rod is slidably connected in the lower mold body in the vertical direction. The upper end of the discharge rod abuts against the lower end face of the discharge sleeve, and the lower end of the discharge rod abuts against the upper end face of the discharge piston.

[0031] The lower mold body is provided with a second pressurization channel that communicates with the connecting hole.

[0032] Furthermore, spirally extending lubrication grooves are provided on the outer wall of the top pressure rod and the outer wall of the discharge rod, respectively.

[0033] Furthermore, the stamping block is slidably connected to the upper die body in the vertical direction by at least one stamping slide rod and is slidably fitted into the upper die cavity;

[0034] The stamping slide bar is slidably connected to the upper die body in the vertical direction, and the stamping block is connected to the lower end of the stamping slide bar;

[0035] The upper end of the stamping slide bar is provided with a third step portion that protrudes outward in a radial direction, and the upper die body is provided with a first limiting and blocking portion. When the stamping block slides downward relative to the upper die body into place, the third step portion abuts against the first limiting and blocking portion to restrict the stamping block from continuing to slide downward.

[0036] The stamping pneumatic component includes a cylinder and a stamping piston;

[0037] The cylinder is connected to the upper mold body, and the cylinder has an inner ring wall.

[0038] The stamping piston is sealed and slidably fitted on the inner side of the inner ring wall in the vertical direction and is used to abut against the upper end of the stamping slide rod. The inner side of the inner ring wall is provided with a third pressurizing chamber located above the stamping piston. The cylinder is provided with an air guide hole communicating with the third pressurizing chamber.

[0039] The upper mold body is provided with a third pressurization channel that communicates with the air guide hole and is used to inject pressurized gas into the third pressurization chamber through the air guide hole.

[0040] Furthermore, the pressure ring is slidably connected to the upper mold body in the vertical direction via at least one pressure slide rod;

[0041] The pressing slide bar is slidably connected to the upper mold body in the vertical direction, and the pressing ring is connected to the lower end of the pressing slide bar;

[0042] The upper end of the pressure slide bar is provided with a fourth step portion that protrudes radially outward, and the upper mold body is provided with a second limiting and blocking portion. When the pressure ring slides downward relative to the upper mold body into place, the fourth step portion abuts against the second limiting and blocking portion to restrict the pressure ring from continuing to slide downward.

[0043] The pressing pneumatic component shares the cylinder body with the stamping pneumatic component, and the pressing pneumatic component further includes a pressing piston;

[0044] The cylinder body also has an outer ring wall located outside the inner ring wall;

[0045] The pressure piston is sealed and slidably fitted between the inner ring wall and the outer ring wall in the up-down direction and is used to abut against the upper end of the pressure slide rod. A fourth pressure chamber is provided between the inner ring wall and the outer ring wall, located above the pressure piston. An air injection hole communicating with the fourth pressure chamber is provided in the cylinder.

[0046] The upper mold body is provided with a fourth pressurization channel that communicates with the air injection hole and is used to inject pressurized gas into the fourth pressurization chamber through the air injection hole.

[0047] Furthermore, spirally extending lubrication grooves are respectively provided on the outer wall of the stamping slide and the outer wall of the pressing slide.

[0048] After adopting the above technical solution, such as Figure 1 The upper die body and the lower die body are in the mold-separation state. At this time, the stamping pneumatic component drives the stamping block to move downwards into position, the top-pressing pneumatic component drives the top-pressing sleeve to slide upwards to press against the lower surface of the material strip, and the discharge pneumatic component drives the discharge sleeve to slide upwards into position. Then, the upper die body and the lower die body close together as shown. Figure 2 In the state shown, the outer periphery of the punch first engages with the inner periphery of the die to punch the strip and obtain a sheet. The pneumatic stamping component drives the stamping block to press the center of the sheet against the punch, and the pneumatic pressing component drives the pressing sleeve to press the outer periphery of the sheet against the punch. Then, the upper die body and the lower die body continue to close until... Figure 3 In the indicated state, the punch extends into the lower die cavity and drives the top-pressing sleeve and the discharge sleeve to move downward against the thrust of the top-pressing pneumatic component and the discharge pneumatic component. The punch extends into the upper die cavity and, through the inner circumference of the punch and the punch itself, stamps the sheet material to form a battery case. At this time, the stamping pneumatic component is compressed and drives the stamping block to press downward against the upper surface of the battery case to press the battery case firmly against the punch. Then, the upper die body and the lower die body separate to form... Figure 4 In the state shown, during this process, the punch retracts from the lower die cavity, the punch retracts from the upper die cavity, the ejector pneumatic component drives the upper end of the ejector sleeve to press upward against the lower end of the battery case, and the stamping pneumatic component continues to drive the stamping block to press downward against the upper surface of the battery case. Since the thrust of the ejector pneumatic component is much smaller than the thrust of the stamping pneumatic component, the battery case is still held tightly against the punch by the stamping block, and the ejector sleeve is pressed down by the battery case and does not rise. The pressing pneumatic component then drives the pressing sleeve to rise and reach its position before the ejector sleeve. Then, the upper die body and the lower die body continue to separate to the desired position. Figure 5In the state shown, the stamping block moves upward with the upper die body until it disengages from the battery casing. The pneumatic ejector applies an upward thrust to the ejector sleeve to drive the ejector sleeve to slide upward, thereby pushing the battery casing upward. The battery casing obtained by the punch and die stamping is a preliminary battery casing. In this embodiment, a single die can be used to both cut the strip to obtain a sheet and perform preliminary stamping to obtain a preliminary battery casing, eliminating the steps of sheet collection, stacking, transfer, and loading. This greatly simplifies the operation, significantly improves the efficiency of preliminary battery casing forming, reduces the processing cost of preliminary battery casing forming, and also reduces the cost of die investment. Furthermore, from... Figure 3 State segmentation to Figure 4 During the process, because the thrust of the stamping pneumatic component is much greater than the thrust of the discharge pneumatic component, the battery casing is still held firmly against the punch by the stamping block, and therefore the battery casing will not deform. From... Figure 4 State segmentation to Figure 5 During the process, when the discharge pneumatic component drives the discharge sleeve to slide upward, the stamping block has already been reset in the upper mold cavity. Therefore, the stamping block does not apply additional pressure to the battery case. Also, because the thrust of the discharge pneumatic component is small, the battery case experiences little force and will not deform during the process of the discharge pneumatic component applying an upward thrust to the discharge sleeve to drive the discharge sleeve to slide upward and push the battery case upward. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of the battery casing punching die of this utility model before mold closing;

[0050] Figure 2 This is a schematic diagram of the battery casing punching die of this utility model during the mold closing process;

[0051] Figure 3 This is a schematic diagram of the structure of the punching and forming mold for the battery casing of this utility model when the mold is closed.

[0052] Figure 4 This is a schematic diagram of the die-cutting mold for battery casing of this utility model during the mold-separation process;

[0053] Figure 5 This is a schematic diagram of the structure of the battery casing punching die of this utility model at the end of the die parting process. Detailed Implementation

[0054] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0055] like Figures 1-5 As shown, a punching forming die for a battery casing includes an upper die body 1, a lower die body 2, a punch 3, a die 4, a punch 5, a discharge sleeve 6, a top pressing sleeve 7, a stamping block 8, a discharge pneumatic component, a top pressing pneumatic component, and a stamping pneumatic component.

[0056] The punch 3 is connected to the lower end of the upper die body 1, the die 4 and the punch 5 are respectively connected to the upper end of the lower die body 2, and the die 4 surrounds the outside of the punch 5. The strip 9 is used to pass through between the punch 3 and the die 4.

[0057] The punch 3 has an upper cavity 10, and the punch 5 and the die 4 have a lower cavity.

[0058] The stamping block 8 is slidably disposed in the upper mold cavity 10 in the vertical direction;

[0059] The stamping pneumatic component is connected to the upper die body 1 and is used to apply a downward thrust to the stamping block 8;

[0060] Both the discharge sleeve 6 and the top pressing sleeve 7 are slidably disposed in the lower mold cavity in the vertical direction. The discharge sleeve 6 is slidably sleeved on the punch 5 and slidably fitted on the inner side of the top pressing sleeve 7.

[0061] The top-pressing pneumatic component is connected in the lower mold body 2 and is used to apply an upward thrust to the top-pressing sleeve 7 to drive the top-pressing sleeve 7 to slide upward to press against the lower surface of the strip 9;

[0062] The discharge pneumatic component is connected in the lower mold body 2 and is used to apply an upward thrust to the discharge sleeve 6 to drive the discharge sleeve 6 to slide upward into place;

[0063] The punch 3 is used to extend into the lower mold cavity when the upper mold body 1 and the lower mold body 2 are closed, and to cooperate with the inner periphery of the die 4 through the outer periphery of the punch 3 to punch the strip 9 to obtain a sheet. The punch 3 is also used to drive the top pressure sleeve 7 and the discharge sleeve 6 to move downward against the thrust of the top pressure pneumatic component and the discharge pneumatic component.

[0064] The punch 5 is used to extend into the upper mold cavity 10 when the upper mold body 1 and the lower mold body 2 are closed, and to press the sheet into a battery case 11 by cooperating with the inner circumference of the punch 3 and the punch 5. The stamping pneumatic component is used to drive the stamping block 8 to press the upper surface of the battery case 11 to press the battery case 11 onto the punch 5.

[0065] The upper end of the discharge sleeve 6 is also used to press against the lower end of the battery case 11 during mold separation to push the battery case 11 upward.

[0066] Specifically, such as Figure 1 The upper mold body 1 and the lower mold body 2 are in the mold-separation state. At this time, the stamping pneumatic component drives the stamping block 8 to move downwards into position, the top-pressing pneumatic component drives the top-pressing sleeve 7 to slide upwards to press against the lower surface of the material strip 9, and the discharge pneumatic component drives the discharge sleeve 6 to slide upwards into position. Then, the upper mold body 1 and the lower mold body 2 close together as shown. Figure 2 In the state shown, the outer periphery of the punch 3 first engages with the inner periphery of the die 4 to punch the strip 9 to obtain a sheet. The pneumatic stamping component drives the stamping block 8 to press the center of the sheet onto the punch 5, and the pneumatic pressing component drives the pressing sleeve 7 to press the outer periphery of the sheet onto the punch 3. Then, the upper die body 1 and the lower die body 2 continue to close until... Figure 3 In the indicated state, the punch 3 extends into the lower die cavity and drives the top pressing sleeve 7 and the discharge sleeve 6 to move downward against the thrust of the top pressing pneumatic component and the discharge pneumatic component. The punch 5 extends into the upper die cavity 10 and, through the inner circumference of the punch 3 and the punch 5, stamps the sheet material to form the battery case 11. At this time, the stamping pneumatic component is compressed and drives the stamping block 8 to press downward against the upper surface of the battery case 11 to press the battery case 11 onto the punch 5. Then the upper die body 1 and the lower die body 2 separate as shown. Figure 4 In the state shown, during this process, the punch 3 retracts from the lower die cavity, the punch 5 retracts from the upper die cavity 10, the ejector pneumatic component drives the upper end of the ejector sleeve 6 to press upward against the lower end of the battery casing 11, and the stamping pneumatic component still drives the stamping block 8 to press downward against the upper surface of the battery casing 11. Since the thrust of the ejector pneumatic component is much smaller than the thrust of the stamping pneumatic component, the battery casing 11 is still held tightly against the punch 5 by the stamping block 8, and the ejector sleeve 6 is pressed down by the battery casing 11 and does not rise. However, the top-pressing pneumatic component will drive the top-pressing sleeve 7 to rise and reach its position before the ejector sleeve 6. Then the upper die body 1 and the lower die body 2 continue to separate to the state shown. Figure 5In the state shown, the stamping block 8 moves upward with the upper die body 1 until it disengages from the battery casing 11. The discharge pneumatic component applies an upward thrust to the discharge sleeve 6 to drive the discharge sleeve 6 to slide upward, thereby pushing the battery casing 11 upward. Specifically, the battery casing 11 obtained by the punch 5 and the punch 3 is a preliminary battery casing 11. In this embodiment, by using one die to stamp once, the strip 9 can be punched to obtain a sheet, and the sheet can be preliminarily stamped to obtain a preliminary battery casing 11. This eliminates the steps of collecting, stacking, transferring, and feeding the sheet, making the operation very simple, greatly improving the efficiency of the preliminary forming of the battery casing 11, reducing the processing cost of the preliminary forming of the battery casing 11, and also reducing the cost of die investment.

[0067] In addition, from Figure 3 State segmentation to Figure 4 During the process, because the thrust of the stamping pneumatic component is much greater than the thrust of the discharge pneumatic component, the battery casing 11 is still held firmly against the punch 5 by the stamping block 8, and therefore the battery casing 11 will not deform. Figure 4 State segmentation to Figure 5 During the process, when the discharge pneumatic component drives the discharge sleeve 6 to slide upward, the stamping block 8 has already been reset in the upper mold cavity 10. Therefore, the stamping block 8 does not apply additional pressure to the battery casing 11. Also, because the thrust of the discharge pneumatic component is small, the battery casing 11 is subjected to less force and will not deform during the process of the discharge pneumatic component applying an upward thrust to the discharge sleeve 6 to drive the discharge sleeve 6 to slide upward and push the battery casing 11 upward.

[0068] like Figures 1-5 As shown, the die for punching and forming the battery casing may further include a pressure ring 12 and a pressure pneumatic component;

[0069] The pressure ring 12 is slidably connected to the upper mold body 1 in the vertical direction and surrounds the outside of the punch 3;

[0070] The pressure-pressing pneumatic component is connected to the upper mold body 1 and is used to apply a downward thrust to the pressure-pressing ring 12. The pressure-pressing pneumatic component is used to drive the pressure-pressing ring 12 to press and fix the material strip 9 on the upper end of the cavity mold 4 when the upper mold body 1 and the lower mold body 2 are closed. Specifically, when the mold is closed, the pressure-pressing ring 12 abuts against the upper surface of the material strip 9, the pressure-pressing pneumatic component is compressed and drives the pressure-pressing ring 12 to press and fix the material strip 9 on the upper end of the cavity mold 4. When the mold is separated, the pressure-pressing pneumatic component extends and drives the pressure-pressing ring 12 to move and reset.

[0071] like Figures 1-5 As shown, the lower mold body 2 is provided with a limiting step 13, and the lower end of the top pressure sleeve 7 is provided with a first step portion 14 that protrudes radially outward. The first step portion 14 is used to abut against the limiting step 13 when the top pressure pneumatic component drives the top pressure sleeve 7 to slide upward into place, so as to limit the position of the top pressure sleeve 7.

[0072] The lower end of the discharge sleeve 6 is provided with a second step portion 15 that protrudes radially outward. The second step portion 15 is used to abut against the lower end face of the top pressing sleeve 7 to limit the position of the discharge sleeve 6.

[0073] like Figures 1-5 As shown, the top-pressure pneumatic component may include a top-pressure cylinder liner 16, a top-pressure piston 17, and at least one top-pressure rod 18;

[0074] The top pressure cylinder liner 16 is installed in the lower mold body 2;

[0075] The top-pressure piston 17 is slidably connected in the top-pressure cylinder liner 16, and the top-pressure cylinder liner 16 is provided with a first pressurizing chamber 19 located below the top-pressure piston 17;

[0076] The top pressure rod 18 is slidably connected in the lower mold body 2 in the vertical direction. The upper end of the top pressure rod 18 abuts against the lower end face of the top pressure sleeve 7, and the lower end of the top pressure rod 18 abuts against the upper end face of the top pressure piston 17.

[0077] The lower mold body 2 is provided with a first pressurizing channel 20 that communicates with the first pressurizing chamber 19 and is used to inject pressurized gas into the first pressurizing chamber 19. Specifically, the injection of pressurized gas into the first pressurizing chamber 19 through the first pressurizing channel 20 can drive the top pressure piston 17 to move upward, thereby applying an upward thrust to the top pressure sleeve 7 through the top pressure rod 18. During the mold closing process, the punch 3 extends into the lower mold cavity and drives the top pressure sleeve 7 to move downward, thereby driving the top pressure rod 18 and the top pressure piston 17 to move downward to compress the gas in the first pressurizing chamber 19. During the mold opening process, the punch 3 exits the lower mold cavity, and the gas in the first pressurizing chamber 19 pushes the top pressure piston 17 to slide upward, thereby driving the top pressure rod 18 and the top pressure sleeve 7 to move upward until the first step portion 14 abuts against the limiting step 13. In this embodiment, a sealing ring is installed between the outer wall of the top pressure cylinder liner 16 and the lower mold body 2, the top pressure piston 17 is slidably connected to the top pressure cylinder liner 16, and multiple top pressure rods 18 are provided.

[0078] like Figures 1-5As shown, the discharge pneumatic component may include at least one pneumatic module, which includes a discharge cylinder liner 21, a discharge piston 22, and a discharge rod 23;

[0079] The discharge cylinder sleeve 21 is installed inside the top pressure cylinder sleeve 16, and the lower end of the discharge cylinder sleeve 21 is connected to the lower mold body 2.

[0080] The top-pressure piston 17 is provided with sliding holes 24 that correspond one-to-one with the discharge cylinder sleeve 21, and the discharge cylinder sleeve 21 is sealed and slidingly connected to the corresponding sliding holes 24.

[0081] The discharge piston 22 is slidably fitted in the discharge cylinder sleeve 21. The discharge cylinder sleeve 21 is provided with a second pressurizing chamber 25 located below the discharge piston 22. The lower end of the discharge cylinder sleeve 21 is provided with a connecting hole 26 communicating with the second pressurizing chamber 25.

[0082] The discharge rod 23 is slidably connected in the lower mold body 2 in the vertical direction. The upper end of the discharge rod 23 abuts against the lower end face of the discharge sleeve 6, and the lower end of the discharge rod 23 abuts against the upper end face of the discharge piston 22.

[0083] The lower mold body 2 is provided with a second pressurizing channel 27 communicating with the connecting hole 26. Specifically, injecting pressurized gas into the second pressurizing chamber 25 through the second pressurizing channel 27 and the connecting hole 26 can drive the discharge piston 22 to move upward, thereby applying an upward thrust to the discharge sleeve 6 through the discharge rod 23. During the mold closing process, the punch 3 extends into the lower mold cavity and drives the top pressure sleeve 7 and the discharge sleeve 6 to move downward. The discharge sleeve 6 will drive the discharge rod 23 and the discharge piston 22 to move downward to compress the gas in the second pressurizing chamber 25. During mold parting, the punch 3 retracts from the lower mold cavity, and the stamping block 8 moves upward with the upper mold body 1 until it disengages from the battery casing 11. During this process, the gas in the second pressurizing chamber 25 pushes the discharge piston 22 upward, thereby driving the discharge rod 23 and the discharge sleeve 6 to move upward to push the battery casing 11 upward until the second step portion 15 abuts against the lower end face of the pressing sleeve 7. In this embodiment, the lower end of the discharge cylinder sleeve 21 is sealed to the lower mold body 2, and the discharge piston 22 is sealed to the discharge cylinder sleeve 21. A total of four pneumatic modules are provided.

[0084] In this embodiment, spirally extending lubrication grooves are provided on the outer wall of the top pressure rod 18 and the outer wall of the discharge rod 23, respectively. The lubrication grooves are used to store lubricating grease to prevent the top pressure rod 18 and the discharge rod 23 from being worn.

[0085] like Figures 1-5 As shown, the stamping block 8 can be slidably connected to the upper die body 1 in the vertical direction by at least one stamping slide rod 28 and slidably fitted into the upper die cavity 10;

[0086] The stamping slide bar 28 is slidably connected to the upper die body 1 in the vertical direction, and the stamping block 8 is connected to the lower end of the stamping slide bar 28;

[0087] The upper end of the stamping slide bar 28 is provided with a third step portion 29 that protrudes radially outward, and the upper die body 1 is provided with a first limiting and blocking portion 30. When the stamping block 8 slides downward relative to the upper die body 1 into place, the third step portion 29 abuts against the first limiting and blocking portion 30 to restrict the stamping block 8 from continuing to slide downward.

[0088] The pneumatic stamping component may include a cylinder 31 and a stamping piston 32;

[0089] The cylinder body 31 is connected to the upper mold body 1, and the cylinder body 31 has an inner ring wall 33;

[0090] The stamping piston 32 is sealed and slidably fitted on the inner side of the inner ring wall 33 in the vertical direction and is used to abut against the upper end of the stamping slide rod 28. The inner side of the inner ring wall 33 is provided with a third pressurizing chamber 34 located above the stamping piston 32. The cylinder body 31 is provided with an air guide hole communicating with the third pressurizing chamber 34.

[0091] The upper mold body 1 is provided with a third pressurizing channel 35 that communicates with the air guide hole and is used to inject pressurized gas into the third pressurizing chamber 34 through the air guide hole. Specifically, injecting pressurized gas into the third pressurizing chamber 34 through the third pressurizing channel 35 and the air guide hole can drive the stamping piston 32 to move downward relative to the cylinder 31, thereby applying a downward thrust to the stamping block 8 through the stamping slide rod 28. During the mold closing process, the upper mold body 1 moves downward, the punch 5 extends into the upper mold cavity 10, and the stamping block 8, the stamping slide rod 28, and the stamping piston 32 all generate an upward displacement relative to the upper mold body 1, thereby compressing the gas in the third pressurizing chamber 34. During the mold parting process, the upper mold body 1 moves upward, the punch 5 exits the upper mold cavity 10, and the gas in the third pressurizing chamber 34 pushes the stamping piston 32 downward, thereby causing the stamping piston 32, the stamping slide rod 28, and the stamping block 8 to move downward relative to the upper mold body 1 and reset, until the third step portion 29 abuts against the first limiting blocking portion 30. In this embodiment, multiple stamping slide rods 28 are provided.

[0092] like Figures 1-5As shown, the pressure ring 12 can be slidably connected to the upper mold body 1 in the vertical direction by at least one pressure slide bar 36;

[0093] The pressing slide bar 36 is slidably connected to the upper mold body 1 in the vertical direction, and the pressing ring 12 is connected to the lower end of the pressing slide bar 36;

[0094] The upper end of the pressing slide bar 36 is provided with a fourth step portion 37 that protrudes radially outward, and the upper mold body 1 is provided with a second limiting and blocking portion 38. When the pressing ring 12 slides downward relative to the upper mold body 1 into place, the fourth step portion 37 abuts against the second limiting and blocking portion 38 to restrict the pressing ring 12 from continuing to slide downward.

[0095] The pressing pneumatic component shares the cylinder body 31 with the stamping pneumatic component, and the pressing pneumatic component also includes a pressing piston 39;

[0096] The cylinder body 31 also has an outer ring wall 40 located outside the inner ring wall 33;

[0097] The pressure piston 39 is slidably fitted between the inner ring wall 33 and the outer ring wall 40 in the vertical direction and is used to abut against the upper end of the pressure slide rod 36. A fourth pressurizing chamber 41 is provided between the inner ring wall 33 and the outer ring wall 40, located above the pressure piston 39. An air injection hole communicating with the fourth pressurizing chamber 41 is provided in the cylinder body 31.

[0098] The upper mold body 1 is provided with a fourth pressurizing channel 42 that communicates with the air injection hole and is used to inject pressurized gas into the fourth pressurizing chamber 41 through the air injection hole. Specifically, injecting pressurized gas into the fourth pressurizing chamber 41 through the fourth pressurizing channel 42 and the air injection hole can drive the pressure piston 39 to move downward relative to the cylinder 31, thereby applying a downward thrust to the pressure ring 12 through the pressure slide rod 36. During the mold closing process, the upper mold body 1 moves downward, the pressure ring 12 presses the material strip 9 against the upper end of the die 4, and the pressure ring 12, the pressure slide rod 36, and the pressure piston 39 all generate an upward displacement relative to the upper mold body 1, thereby compressing the gas in the fourth pressurizing chamber 41. During the mold parting process, the upper mold body 1 moves upward, and the gas in the fourth pressurizing chamber 41 pushes the pressure piston 39 downward, thereby causing the pressure piston 39, the pressure slide rod 36, and the pressure ring 12 to move downward relative to the upper mold body 1 and reset, until the fourth step portion 37 abuts against the second limiting blocking portion 38. In this embodiment, multiple pressure slide rods 36 are provided.

[0099] In this embodiment, spirally extending lubrication grooves are also provided on the outer wall of the stamping slide 28 and the outer wall of the pressing slide 36, respectively. The lubrication grooves are used to store grease to prevent the stamping slide 28 and the pressing slide 36 from being worn.

[0100] In summary, such as Figure 1 The upper mold body 1 and the lower mold body 2 are in the mold-separation state. At this time, the stamping pneumatic component drives the stamping block 8 to move downwards into position, the top-pressing pneumatic component drives the top-pressing sleeve 7 to slide upwards to press against the lower surface of the material strip 9, and the discharge pneumatic component drives the discharge sleeve 6 to slide upwards into position. Then, the upper mold body 1 and the lower mold body 2 close together as shown. Figure 2 In the state shown, the outer periphery of the punch 3 first engages with the inner periphery of the die 4 to punch the strip 9 to obtain a sheet. The pneumatic stamping component drives the stamping block 8 to press the center of the sheet onto the punch 5, and the pneumatic pressing component drives the pressing sleeve 7 to press the outer periphery of the sheet onto the punch 3. Then, the upper die body 1 and the lower die body 2 continue to close until... Figure 3 In the indicated state, the punch 3 extends into the lower die cavity and drives the top pressing sleeve 7 and the discharge sleeve 6 to move downward against the thrust of the top pressing pneumatic component and the discharge pneumatic component. The punch 5 extends into the upper die cavity 10 and, through the inner circumference of the punch 3 and the punch 5, stamps the sheet material to form the battery case 11. At this time, the stamping pneumatic component is compressed and drives the stamping block 8 to press downward against the upper surface of the battery case 11 to press the battery case 11 onto the punch 5. Then the upper die body 1 and the lower die body 2 separate as shown. Figure 4 In the state shown, during this process, the punch 3 retracts from the lower die cavity, the punch 5 retracts from the upper die cavity 10, the ejector pneumatic component drives the upper end of the ejector sleeve 6 to press upward against the lower end of the battery casing 11, and the stamping pneumatic component still drives the stamping block 8 to press downward against the upper surface of the battery casing 11. Since the thrust of the ejector pneumatic component is much smaller than the thrust of the stamping pneumatic component, the battery casing 11 is still held tightly against the punch 5 by the stamping block 8, and the ejector sleeve 6 is pressed down by the battery casing 11 and does not rise. However, the top-pressing pneumatic component will drive the top-pressing sleeve 7 to rise and reach its position before the ejector sleeve 6. Then the upper die body 1 and the lower die body 2 continue to separate to the state shown. Figure 5In the state shown, the stamping block 8 moves upward with the upper die body 1 until it disengages from the battery casing 11. The discharge pneumatic component applies an upward thrust to the discharge sleeve 6 to drive the discharge sleeve 6 to slide upward, thereby pushing the battery casing 11 upward. The battery casing 11 formed by the punch 5 and the punch 3 is a preliminary battery casing 11. In this embodiment, a single die can be used to punch the strip 9 to obtain a sheet, and also to perform preliminary stamping to obtain a preliminary battery casing 11. This eliminates the steps of collecting, stacking, transferring, and loading the sheet, making the operation very simple, greatly improving the efficiency of preliminary battery casing 11 forming, reducing the processing cost of preliminary battery casing 11 forming, and also reducing the die investment cost. Furthermore, from... Figure 3 State segmentation to Figure 4 During the process, because the thrust of the stamping pneumatic component is much greater than the thrust of the discharge pneumatic component, the battery casing 11 is still held firmly against the punch 5 by the stamping block 8, and therefore the battery casing 11 will not deform. Figure 4 State segmentation to Figure 5 During the process, when the discharge pneumatic component drives the discharge sleeve 6 to slide upward, the stamping block 8 has already been reset in the upper mold cavity 10. Therefore, the stamping block 8 does not apply additional pressure to the battery casing 11. Also, because the thrust of the discharge pneumatic component is small, the battery casing 11 is subjected to less force and will not deform during the process of the discharge pneumatic component applying an upward thrust to the discharge sleeve 6 to drive the discharge sleeve 6 to slide upward and push the battery casing 11 upward.

[0101] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A punching die for a battery casing, characterized in that, It includes an upper die body (1), a lower die body (2), a punch (3), a die (4), a punch (5), a discharge sleeve (6), a top-pressing sleeve (7), a stamping block (8), a discharge pneumatic component, a top-pressing pneumatic component, and a stamping pneumatic component; The punch (3) is connected to the lower end of the upper die body (1), the die (4) and the punch (5) are respectively connected to the upper end of the lower die body (2) and the die (4) surrounds the outside of the punch (5), and the strip (9) is used to pass through between the punch (3) and the die (4). The punch (3) is provided with an upper mold cavity (10), and a lower mold cavity is provided between the punch (5) and the die (4). The stamping block (8) is slidably disposed in the upper mold cavity (10) in the up-down direction. The stamping pneumatic component is connected to the upper die body (1) and is used to apply a downward thrust to the stamping block (8); The discharge sleeve (6) and the top pressing sleeve (7) are both slidably disposed in the lower mold cavity in the up and down direction. The discharge sleeve (6) is slidably sleeved on the punch (5) and slidably fitted on the inner side of the top pressing sleeve (7). The top-pressing pneumatic component is connected in the lower mold body (2) and is used to apply an upward thrust to the top-pressing sleeve (7) to drive the top-pressing sleeve (7) to slide upward to press against the lower surface of the strip (9); The discharge pneumatic component is connected in the lower mold body (2) and is used to apply an upward thrust to the discharge sleeve (6) to drive the discharge sleeve (6) to slide upward into place; The punch (3) is used to extend into the lower mold cavity when the upper mold body (1) and the lower mold body (2) are closed, and to cooperate with the inner periphery of the die (4) through the outer periphery of the punch (3) to punch the strip (9) to obtain a sheet. The punch (3) is also used to drive the top pressure sleeve (7) and the discharge sleeve (6) to move downward against the thrust of the top pressure pneumatic component and the discharge pneumatic component. The punch (5) is used to extend into the upper mold cavity (10) when the upper mold body (1) and the lower mold body (2) are closed, and to press the sheet into a battery case (11) by cooperating with the inner periphery of the punch (3) and the punch (5). The stamping pneumatic component is used to drive the stamping block (8) to press the upper surface of the battery case (11) to press the battery case (11) onto the punch (5). The upper end of the discharge sleeve (6) is also used to press against the lower end of the battery case (11) during mold separation to push the battery case (11) upward.

2. The die for punching and forming a battery casing according to claim 1, characterized in that, It also includes a pressure ring (12) and a pressure pneumatic component; The pressure ring (12) is slidably connected to the upper mold body (1) in the up-down direction and surrounds the outside of the punch (3); The pressure pneumatic component is connected in the upper mold body (1) and is used to apply a downward thrust to the pressure ring (12). The pressure pneumatic component is used to drive the pressure ring (12) to press and fix the material strip (9) on the upper end of the die (4) when the upper mold body (1) and the lower mold body (2) are closed.

3. The die for punching and forming a battery casing according to claim 1, characterized in that, The lower mold body (2) is provided with a limiting step (13); The lower end of the top pressure sleeve (7) is provided with a first step portion (14) that protrudes radially outward. The first step portion (14) is used to abut against the limiting step (13) to limit the position of the top pressure sleeve (7) when the top pressure pneumatic component drives the top pressure sleeve (7) to slide upward into place.

4. The die for punching and forming a battery casing according to claim 3, characterized in that, The lower end of the discharge sleeve (6) is provided with a second step (15) that protrudes radially outward. The second step (15) is used to abut against the lower end face of the top pressing sleeve (7) to limit the position of the discharge sleeve (6).

5. The die for punching and forming a battery casing according to claim 1, characterized in that, The top-pressure pneumatic component includes a top-pressure cylinder liner (16), a top-pressure piston (17), and at least one top-pressure rod (18); The top pressure cylinder liner (16) is installed in the lower mold body (2); The top-pressure piston (17) is slidably connected in the top-pressure cylinder liner (16), and the top-pressure cylinder liner (16) is provided with a first pressurizing chamber (19) located below the top-pressure piston (17); The top pressure rod (18) is slidably connected in the lower mold body (2) in the vertical direction. The upper end of the top pressure rod (18) abuts against the lower end face of the top pressure sleeve (7), and the lower end of the top pressure rod (18) abuts against the upper end face of the top pressure piston (17). The lower mold body (2) is provided with a first pressurization channel (20) that communicates with the first pressurization chamber (19) and is used to inject pressurized gas into the first pressurization chamber (19).

6. The die for punching and forming a battery casing according to claim 5, characterized in that, The discharge pneumatic component includes at least one pneumatic module, which includes a discharge cylinder liner (21), a discharge piston (22), and a discharge rod (23); The discharge cylinder sleeve (21) is installed inside the top pressure cylinder sleeve (16), and the lower end of the discharge cylinder sleeve (21) is connected to the lower mold body (2). The top-pressure piston (17) is provided with sliding holes (24) that correspond one-to-one with the discharge cylinder sleeve (21), and the discharge cylinder sleeve (21) is sealed and slidably connected to the corresponding sliding holes (24); The discharge piston (22) is slidably fitted in the discharge cylinder sleeve (21). The discharge cylinder sleeve (21) is provided with a second pressurizing chamber (25) located below the discharge piston (22). The lower end of the discharge cylinder sleeve (21) is provided with a connecting hole (26) communicating with the second pressurizing chamber (25). The discharge rod (23) is slidably connected in the lower mold body (2) in the up and down direction. The upper end of the discharge rod (23) abuts against the lower end face of the discharge sleeve (6), and the lower end of the discharge rod (23) abuts against the upper end face of the discharge piston (22). The lower mold body (2) is provided with a second pressurization channel (27) that communicates with the connecting hole (26).

7. The die for punching and forming a battery casing according to claim 6, characterized in that, The outer wall of the top pressure rod (18) and the outer wall of the discharge rod (23) are respectively provided with spirally extending lubrication grooves.

8. The die for punching and forming a battery casing according to claim 1, characterized in that, The stamping block (8) is slidably connected to the upper die body (1) in the vertical direction by at least one stamping slide rod (28) and is slidably fitted into the upper die cavity (10); The stamping slide bar (28) is slidably connected to the upper die body (1) in the vertical direction, and the stamping block (8) is connected to the lower end of the stamping slide bar (28); The upper end of the stamping slide bar (28) is provided with a third step (29) that protrudes radially outward. The upper die body (1) is provided with a first limiting stop (30). When the stamping block (8) slides down to the upper die body (1), the third step (29) abuts against the first limiting stop (30) to restrict the stamping block (8) from continuing to slide down. The pneumatic stamping component includes a cylinder (31) and a stamping piston (32); The cylinder (31) is connected to the upper mold body (1), and the cylinder (31) has an inner ring wall (33); The stamping piston (32) is sealed and slidably fitted on the inner side of the inner ring wall (33) in the vertical direction and is used to abut against the upper end of the stamping slide rod (28). The inner side of the inner ring wall (33) is provided with a third pressurizing chamber (34) located above the stamping piston (32). The cylinder body (31) is provided with an air guide hole communicating with the third pressurizing chamber (34). The upper mold body (1) is provided with a third pressurization channel (35) that communicates with the air guide hole and is used to inject pressurized gas into the third pressurization chamber (34) through the air guide hole.

9. The die for punching and forming a battery casing according to claim 8, characterized in that, It also includes a pressure ring (12) and a pressure pneumatic component, wherein the pressure ring (12) is slidably connected to the upper die body (1) in the up-down direction and surrounds the outside of the punch (3); The material pressing pneumatic component is connected in the upper mold body (1) and is used to apply a downward thrust to the material pressing ring (12). The material pressing pneumatic component is used to drive the material pressing ring (12) to press and fix the material strip (9) on the upper end of the die (4) when the upper mold body (1) and the lower mold body (2) are closed. The pressure ring (12) is slidably connected to the upper mold body (1) in the vertical direction by at least one pressure slide rod (36); The pressing slide bar (36) is slidably connected to the upper mold body (1) in the vertical direction, and the pressing ring (12) is connected to the lower end of the pressing slide bar (36); The upper end of the pressure slide bar (36) is provided with a fourth step (37) that protrudes radially outward, and the upper mold body (1) is provided with a second limiting blocking part (38). When the pressure ring (12) slides down to the lower position relative to the upper mold body (1), the fourth step (37) abuts against the second limiting blocking part (38) to restrict the pressure ring (12) from continuing to slide down. The pressing pneumatic component shares the cylinder body (31) with the stamping pneumatic component, and the pressing pneumatic component further includes a pressing piston (39); The cylinder (31) also has an outer ring wall (40) located outside the inner ring wall (33); The pressure piston (39) is sealed and slidably fitted between the inner ring wall (33) and the outer ring wall (40) in the up-down direction and is used to abut against the upper end of the pressure slide rod (36). A fourth pressurizing chamber (41) is provided between the inner ring wall (33) and the outer ring wall (40) and located above the pressure piston (39). An air injection hole communicating with the fourth pressurizing chamber (41) is provided in the cylinder body (31). The upper mold body (1) is provided with a fourth pressurization channel (42) that communicates with the air injection hole and is used to inject pressurized gas into the fourth pressurization chamber (41) through the air injection hole.

10. The die for punching and forming a battery casing according to claim 9, characterized in that, The outer wall of the stamping slide bar (28) and the outer wall of the pressing slide bar (36) are respectively provided with spirally extending lubrication grooves.

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