Automatic stamping equipment for lithium battery shell

Abstract

The application provides a lithium battery shell automatic punching equipment and belongs to the lithium battery processing technical field. The equipment comprises a rack, a lower die base and an upper pressing base are arranged on the inner side of the rack, a positioning assembly for positioning a metal plate is arranged on the lower die base, a punching block and a first displacement block are respectively arranged on the upper pressing base and the lower die base, the first displacement block is installed in the punching groove of the lower die base in a lifting mode, an upper forming block is vertically and slidingly arranged on the outer side of the punching block of the upper pressing base, lower forming blocks are arranged around the first displacement block of the lower die base, and a punch for the reinforcing rib is arranged on the bottom wall of the upper forming block. The reinforcing rib is punched and formed on the side plate of the plate through cooperation of the upper forming block and the lower forming block, then the lower forming block is overturned to turn the side plate upside down to form the general shape of the battery shell, and the punching block is pressed downward to cooperate with the first displacement block to shape the battery shell, so that the wrinkles formed in the process of punching and forming the lithium battery shell are reduced, and the automatic processing efficiency of the battery shell is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lithium battery processing, and particularly relates to a lithium battery shell automatic stamping equipment. BACKGROUND

[0002] Lithium batteries are a type of battery that uses lithium metal or lithium alloy as the negative electrode material. The charging and discharging of lithium batteries is achieved through the migration of lithium ions between the positive and negative electrodes. Lithium batteries have advantages such as high energy density, long cycle life, and low self-discharge. With the continuous rise of new energy, lithium batteries have been widely used in electric vehicles, new energy vehicles, and various portable devices.

[0003] For large-capacity lithium batteries, a shell capable of safely storing lithium batteries is crucial. Common lithium batteries are formed by stamping raw materials such as steel plates and aluminum plates to produce shells that meet the design requirements of lithium batteries. The purpose of this process is to ensure that the lithium battery shell has sufficient strength and sealing to protect the internal structure of the battery and prevent external substances from entering. The lithium battery shell is composed of a bottom plate and four side plates to form an open-top box. The edges of the two parallel side plates of the lithium battery shell extend with a flange for welding connection. When the side plates are turned to form the box, the flanges are bent to cover the adjacent side plates. After the overlapping flanges and side plates are welded, a structurally stable new energy battery shell is formed.

[0004] For lithium batteries that are often taken out of the house and power equipment, it is necessary to have a surface impact and puncture resistance. Therefore, the surface of the lithium battery shell can be designed with strip-shaped and protruding ribs to enhance the impact and puncture resistance of the lithium battery shell. However, conventional stamping only produces lithium battery shells with smooth surfaces, so new stamping equipment is needed to meet the production needs of lithium battery shells. SUMMARY

[0005] In view of the above problems, the present application provides a lithium battery shell automatic stamping equipment.

[0006] In order to achieve the above-mentioned application purpose, the technical scheme adopted by the present application is as follows:

[0007] The present application provides a lithium battery shell automatic stamping equipment, which comprises a rack, a lower die seat and an upper pressing seat are arranged on the inner side of the rack, a placing area for placing workpieces is formed between the lower die seat and the upper pressing seat, and a first driving assembly for vertically lifting the upper pressing seat is arranged on the rack;

[0008] A positioning assembly for positioning the metal plate is arranged on the lower die seat, and a stamping block and a first displacement block for cooperating with the clamping plate to form the lower bottom wall of the lithium battery shell are arranged on the upper pressing seat and the lower die seat, respectively, and a second driving assembly for lifting the first displacement block is arranged on the lower die seat;

[0009] The upper forming block is vertically slidably arranged in the upper pressing seat, the third driving assembly for driving the upper forming block to vertically ascend is arranged in the upper pressing seat, the lower die seat is provided with the lower forming block around the first displacement block, the lower forming block is matched with the upper forming block to form the reinforcing rib on the side wall of the lithium battery shell, the punch of the reinforcing rib is arranged on the bottom wall of the upper forming block, and the fourth driving assembly for driving the lower forming block to be in close contact with the workpiece during stamping is arranged on the lower die seat.

[0010] Further, the first driving assembly comprises a first hydraulic cylinder fixedly arranged on the rack, and a plurality of first guide columns are vertically arranged on the rack, and the upper pressing seat is slidably sleeved on the first guide columns;

[0011] The second driving assembly comprises a second hydraulic cylinder fixedly arranged on the lower die seat, and the lower die seat is provided with a stamping groove;

[0012] The third driving assembly comprises a third hydraulic cylinder fixedly arranged on the upper die seat.

[0013] Further, the positioning assembly comprises a positioning block protruding from the top wall of the lower die seat, and the positioning block is used for matching the included angle formed by the flange on the plate and the adjacent side plate.

[0014] Further, the fourth driving assembly comprises a diagonal support part, the lower die seat is provided with a displacement opening vertically passing through the lower forming block around the first displacement block, one end of the lower forming block close to the first displacement block is provided with a rotating shaft, a strip-shaped groove is vertically arranged on the inner wall of the displacement opening, the rotating shaft is slidably arranged in the strip-shaped groove, the diagonal support part is rotatably arranged in the lower die seat, the diagonal support part is in rolling contact with the bottom wall of the lower forming block, and the first driving source for driving the diagonal support part to rotate is arranged on the lower die seat.

[0015] Further, the lower die seat is provided with a supporting groove for accommodating and supporting the forming block in a horizontal state, a first mounting groove for accommodating the diagonal support part is arranged in the supporting groove, a slide channel is arranged in the first mounting groove, a sliding block is slidably arranged in the slide channel, the first driving source is a fourth hydraulic cylinder for driving the sliding block to move, a transmission rod is hingedly arranged on the sliding block, and one end of the transmission rod away from the sliding block is hingedly connected with the diagonal support part.

[0016] Further, a second mounting groove is arranged on one side of the lower forming block for close contact with the workpiece, a reset push block is slidably arranged in the second mounting groove, and the lower forming block is provided with a first elastic member for driving the reset push block to extend out of the second mounting groove.

[0017] Further, a plurality of rollers are rotatably arranged on the diagonal support part, and the rollers are in rolling contact with the bottom wall of the lower forming block.

[0018] Further, the lower die seat is provided with a side pressing assembly for turning up the side pressing plate to make the turned-up edge overlap the adjacent side plate, the lower forming block comprises two pieces of first forming blocks and two pieces of second forming blocks, the side pressing assembly comprises a side pressing push block, the side pressing push block is arranged on both sides of each first forming block and axially slides along the rotation shaft of the second forming block, and the lower die seat is provided with a fifth driving assembly for driving the side pressing push block to move.

[0019] Further, the side pressing push block is provided with a guide inclined surface close to the end surface of the second forming block and close to the edge of the stamping groove.

[0020] Further, the lower die seat is provided with a side pressing assembly for turning up the side pressing plate to make the turned-up edge overlap the adjacent side plate, the lower forming block comprises two pieces of first forming blocks and two pieces of second forming blocks, the side pressing assembly comprises a side pressing push block, the side pressing push block is arranged on both sides of each first forming block and axially slides along the rotation shaft of the second forming block, and the lower die seat is provided with a fifth driving assembly for driving the side pressing push block to move.

[0021] The beneficial effects of the present application are as follows: when the lithium battery shell is processed, the metal plate obtained by blanking is positioned and placed on the lower die seat, the upper pressing seat is pressed down, first, the upper forming block and the lower forming block cooperate to stamp and form the reinforcing ribs on the side plate, then, the upper forming block is lifted, the lower forming block is turned over, the side plate is turned up to form the general shape of the battery shell, the upper pressing seat is further pressed down, the battery shell is sunk into the lower die seat together with the lower forming block, the battery shell is further shaped, the side pressing push block in the lower die seat can act to fold and overlap the turned-up edge on the adjacent side plate, finally, the battery shell is sent out of the stamping groove, the automatic stamping forming of the lithium battery shell is realized, the wrinkles caused by excessive metal flow during the stamping forming of the lithium battery shell are reduced, the turned-up edge is automatically processed, and the stamping processing efficiency of the lithium battery shell is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a whole structure schematic view of the automatic stamping equipment for the lithium battery shell of the embodiment of the present application.

[0023] Figure 2 It is a structure schematic view of the lower die seat of the embodiment of the present application.

[0024] Figure 3 It is a structure schematic view of the upper pressing seat of the embodiment of the present application.

[0025] Figure 4 It is a structure schematic view of the lower die seat structure of the embodiment of the present application in the initial state of loading the plate.

[0026] Figure 5It is a structure schematic view of the side plate folding state of the lower forming block of the embodiment of the present application to the plate member.

[0027] Figure 6 It is a structure schematic view of the lower forming block of the embodiment of the present application.

[0028] Figure 7 It is a structure schematic view of the side pressure assembly to the upper edge folding processing state of the shell of the embodiment of the present application.

[0029] Figure 8 It is a structure schematic view of the lower forming block of the embodiment of the present application. Figure 7 It is a partial enlarged schematic view of the middle A part.

[0030] Figure 9 It is a structure schematic view of the positioning block and the positioning tooth of the embodiment of the present application.

[0031] Wherein, 1, rack; 11, upper pressing seat; 12, lower die seat; 121, accommodation port; 122, strip-shaped slot; 123, support slot; 13, placement area; 14, first driving assembly; 15, first guide column; 2, positioning block; 3, stamping block; 4, first accommodation block; 41, second driving assembly; 42, support step; 5, upper forming block; 51, third driving assembly; 6, lower forming block; 61, fourth driving assembly; 611, inclined support part; 612, sliding block; 613, first driving source; 614, transmission rod; 615, second mounting slot; 616, reset push block; 617, first elastic member; 618, roller; 62, first forming block; 63, second forming block; 7, side pressure assembly; 71, side pressure push block; 711, guide inclined surface; 72, fifth driving assembly; 81, third mounting slot; 82, shaping block; 83, shaping tooth; 84, second elastic member; 85, guide wheel. DETAILED DESCRIPTION

[0032] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in combination with the drawings of the specification and specific embodiments.

[0033] The embodiment of the present application discloses a kind of automatic stamping equipment of lithium battery shell, refer to Figure 1 、 Figure 2 And Figure 3, including rack 1, the lower die seat 12 and the upper die seat 11 are sequentially arranged from bottom to top in the rack 1, the upper die seat 11 is vertically installed in the rack 1, and the placement area 13 for placing the workpiece is formed between the upper die seat 11 and the lower die seat 12. Specifically, the first guide column 15 is vertically and fixedly installed at the four corners of the rack 1, the guide sleeve is fixedly installed at the four corners of the upper die seat 11, the guide slide is sleeved on the first guide column 15, and the first driving assembly 14 for driving the upper die seat 11 to vertically ascend and descend is arranged on the rack 1. The first driving assembly 14 can be a first hydraulic cylinder, and the upper mounting plate and the lower mounting plate are arranged at the top and the bottom of the rack 1 respectively, the first hydraulic cylinder is fixedly arranged on the upper mounting plate, and the piston rod of the first hydraulic cylinder is fixedly connected to the upper die seat 11 after penetrating through the upper mounting plate.

[0034] The positioning assembly for positioning the metal plate obtained by blanking is arranged on the lower die seat 12, so that the worker can quickly position and place the metal plate on the lower die seat 12 during the stamping process. In the embodiment of the present application, the metal plate obtained by the preceding step is cross-shaped, and the four side plates can be folded upward to form a lithium battery shell with an open top. The flange is extended on both sides of the side plate on two parallel side plates. By folding the flange, the flange can be overlapped with the other two side plates. In the subsequent production process, the overlapped flange and side plate are welded to form a stable structure of the lithium battery shell. The positioning assembly is specifically a positioning block 2 protruding from the top wall of the lower die seat 12. The positioning block 2 is used to abut the included angle between the flange and the adjacent side plate on the metal plate. The positioning block 2 includes at least two blocks, which abut the two included angles on the plate in a diagonal manner, so as to realize the quick positioning of the plate during the installation of the plate to the lower die seat 12. The upper die seat 11 and the upper forming block 5 leave space for the positioning block 2.

[0035] The stamping block 3 is fixedly installed at the bottom of the upper die seat 11, the stamping groove is arranged on the lower die seat 12, the first clearance block 4 is vertically installed in the stamping groove, the first clearance block 4 is installed in the stamping groove, and the second driving assembly 41 for driving the first clearance block 4 to vertically ascend and descend in the stamping groove is arranged on the lower die seat 12. When the upper die seat 11 moves downward to stamp the plate, the plate is clamped in the middle by the stamping block 3 and the first clearance block 4, and then the plate is formed into a shell in the stamping groove by the synchronous descending of the first clearance block 4 and the stamping block 3. Specifically, the second driving assembly 41 can adopt a second hydraulic cylinder, the second hydraulic cylinder is fixedly installed on the lower die seat 12, and the piston rod of the second hydraulic cylinder is fixedly connected with the first clearance block 4.

[0036] Referring to Figure 4 and Figure 5In order to stamp the reinforcing ribs on the side wall of the shell, in the embodiment of the present application, upper forming blocks 5 are arranged around the bottom of the upper die holder 11 at the stamping groove, and lower forming blocks 6 are arranged around the top of the lower die holder 12 at the stamping groove. The upper forming blocks 5 are convex dies, and the lower forming blocks 6 are concave dies. The upper forming blocks 5 are vertically lifted and installed on the upper die holder 11. The third driving assembly 51 is arranged in the upper die holder 11 to vertically lift the upper forming blocks 5. Through the third driving assembly 51, the bottom wall of the upper forming blocks 5 can be lowered to be flush with the bottom wall of the stamping block 3. During the process of lowering the upper die holder 11 to clamp the plate member between the stamping block 3 and the first displacement block 4, the upper forming blocks 5 cooperate with the lower forming blocks 6 to stamp the reinforcing ribs on the side plates around the plate member. After the reinforcing ribs are formed, the upper forming blocks 5 are lifted, and the upper die holder 11 continues to lower to stamp the shell. Specifically, the third driving assembly 51 can be a third hydraulic cylinder. The third hydraulic cylinder is fixed on the upper die holder 11, and the piston rod of the third hydraulic cylinder is fixedly connected with the upper forming blocks 5.

[0037] In order to reduce the edge wrinkles or distortion of the shell caused by the metal flow deformation of the side plates of the plate member during the stamping process of the plate member, in the embodiment of the present application, the lower forming blocks 6 are movably arranged on the lower die holder 12. The fourth driving assembly 61 is arranged on the lower die holder 12 to drive the lower forming blocks 6 to be in close contact with the workpiece during the stamping process. Specifically, the fourth driving assembly 61 includes a diagonal support part 611. The lower die holder 12 is provided with a displacement opening 121 around the first displacement block 4 for the vertical passage of the lower forming blocks 6. The end of the lower forming blocks 6 close to the first displacement block 4 is provided with a rotating shaft. A strip-shaped groove is vertically arranged on the inner wall of the displacement opening 121. The rotating shaft is slidingly installed in the strip-shaped groove. Through the movement of the rotating shaft in the strip-shaped groove, the lower forming blocks 6 can rotate around the rotating shaft and be vertically inserted into the displacement opening 121. The first displacement block 4 is integrally fixed with a support step 42 around the four sides. The support step 42 fills the displacement opening 121, and the support step 42 is located below the lower forming blocks 6. The diagonal support part 611 is rotatably installed in the lower die holder 12. The diagonal support part 611 is in rolling contact with the bottom wall of the lower forming blocks 6. The lower die holder 12 is provided with a first driving source 613 to drive the diagonal support part 611 to rotate. By driving the diagonal support part 611 to rotate, the diagonal support part 611 pushes the lower forming blocks 6 to overturn, and the side plates of the plate member are folded upward. The plate member can be pre-folded under the premise of maintaining the reinforcing ribs.

[0038] After folding, the end of the lower forming block 6 away from the shaft is located below the upper forming block 5, and the forming control upper forming block 5 is moved downward to the abutment of the lower forming block 6 and the upper forming block 5. Specifically, a contact sensor or an infrared sensor can be arranged at the end of the lower forming block 6 away from the shaft to timely detect the contact state of the upper forming block 5 and the lower forming block 6. After determining that the two are in contact, the upper pressing seat 11 and the first displacement block 4 can be lowered synchronously, and the plate is continuously fed downward for stamping by the stamping block 3. The lower forming block 6 maintains the contact state with the side plate and gradually sinks into the displacement opening 121, so that the plate is completely stamped into a battery shell, while maintaining the shape of the reinforcing ridge on the side plate, reducing the forced flow of metal during stamping, and improving the effect of the formed battery shell.

[0039] In the embodiment of the present application, the lower die seat 12 is provided with a support groove 123 for accommodating and supporting the forming block 6 in a horizontal state. The support groove 123 is further provided with a first installation groove for accommodating the inclined support part 611. A slide is formed on the inner wall of the first installation groove, and a sliding block 612 is slidably installed in the slide. A transmission rod 614 is hingedly connected to the sliding block 612, and the end of the transmission rod 614 away from the sliding block 612 is hingedly connected to the inclined support part 611. The first driving source 613 can specifically be a fifth hydraulic cylinder. The fifth hydraulic cylinder is fixed on the side wall of the lower die seat 12, and the piston rod of the fifth hydraulic cylinder extends into the lower die seat 12 and is fixedly connected with the sliding block 612. The sliding direction of the sliding block 612 is perpendicular to the rotation axis of the corresponding inclined support part 611 in space. By driving the sliding block 612 to move, the inclined support part 611 can be driven to overturn, so as to overturn and fold the lower forming block 6.

[0040] After the workpiece is pressed and formed, as the upper pressing seat 11 and the first displacement block 4 rise, the support step 42 on the first displacement block 4 supports the lower forming block 6 to exit the displacement opening 121, and when the first displacement block 4 rises to be flush with the top wall of the lower die seat 12, the upper forming block 5 is driven to gradually descend, so that when the stamping block 3 rises with the upper pressing seat 11, the formed battery shell is gradually removed from the stamping block 3, avoiding the situation that the battery shell is tightly clamped on the stamping block 3, causing difficulty in demolding.

[0041] In the embodiment of the present application, the length of the inclined support part 611 should be less than the length of the lower forming block 6. During stamping, the inclined support part 611 first supports the lower forming block 6 to overturn vertically, and when the lower forming block 6 is pushed into the displacement opening 121, the inclined support part 611 retreats and descends to give way to the descent of the upper pressing seat 11. When the lower forming block 6 is pushed out upward from the displacement opening 121, the inclined support part 611 rises to support the lower forming block 6, preventing the lower forming block 6 from freely overturning outward and colliding with the support groove 123.

[0042] Further, a plurality of rollers 618 are rotatably installed on the inclined support part 611, the axis of the rollers 618 is parallel to the rotation axis of the inclined support part 611, and the plurality of rollers 618 are uniformly and spacedly arranged along the length direction of the inclined support part 611. When the lower forming block 6 is driven to move downward by the pressing seat 11, the friction between the lower forming block 6 and the inner wall of the stamping groove when the lower forming block 6 enters the accommodation opening 121 can be reduced by the rollers 618, so that the lower forming block 6 can smoothly enter the accommodation opening 121 in the process of being supported by the side plate of the plate part.

[0043] With reference to Figure 6 Further, in order to make the lower forming block 6 naturally rotate outward after the upper pressing seat 11 and the first accommodation block 4 are lifted from the stamping groove, and to avoid that the lower forming block 6 remains adhered to the battery shell and affects the demolding of the shell, in the embodiment of the present application, the side of the lower forming block 6 used for adhering to the workpiece is provided with a second installation groove 615, a reset push block 616 is slidably arranged in the second installation groove 615, and the lower forming block 6 is provided with a first elastic member 617 for driving the reset push block 616 to extend out of the second installation groove 615. When the lower forming block 6 is lifted from the accommodation opening 121, the first elastic member 617 pushes the reset push block 616 to abut against the side plate of the plate part, so that the lower forming block 6 is no longer in a vertical state, and the lower forming block 6 is conveniently turned over to be in contact with the inclined support part 611, so that the battery shell can be smoothly demolded. The first elastic member 617 is a first spring, one end of the first spring is fixedly connected to the bottom wall in the second installation groove 615, and the other end is fixedly connected with the reset push block 616. A anti-disengagement structure is designed between the reset push block 616 and the second installation groove 615.

[0044] With reference to Figure 7 , Figure 8 and Figure 9 Further, in order to improve the processing efficiency of the lithium battery shell, a side pressing assembly 7 for pressing the flange of the plate part to make the flange and the adjacent side plate overlap with each other is further arranged in the lower die seat 12. Specifically, the side pressing assembly 7 includes a side pressing push block 71. In the embodiment of the present application, the lower forming block 6 includes two first forming blocks 62 which are symmetrical to each other and two second forming blocks 63 which are symmetrical to each other, and the flange on the plate part is integrally connected to the edge of the corresponding side plate of the first forming block 62. The side pressing push block 71 is arranged on both sides of each two first forming blocks 62 and is slidably arranged in the lower die seat 12 along the rotation axis of the second forming block 63. A fifth driving assembly 72 for driving the side pressing push block 71 to move is arranged in the lower die seat 12. The fifth driving assembly 72 is specifically a sixth hydraulic cylinder, the sixth hydraulic cylinder is fixed to the outer wall of the lower die seat 12, and the piston rod of the sixth hydraulic cylinder extends into the lower die seat 12 and is fixedly connected with the side pressing push block 71.

[0045] Furthermore, the side pressure push block 71 is provided with a guide slope 711 near the end face of the second forming block 63 and near the edge of the stamping groove. The guide slope 711 can prevent the side pressure push block 71 from causing flanging shear during the stamping and flanging process, thereby improving the stamping effect of flanging.

[0046] Furthermore, a third mounting groove 81 is provided on both sides of the clearance opening 121 corresponding to the second forming block 63 within the lower mold base 12. The third mounting groove 81 connects to the stamping groove, and the opening of the third mounting groove 81 faces the flange of the folded and fitting side plate. A shaping block 82 is slidably installed within the third mounting groove 81 along the depth direction of the third mounting groove 81. A shaping tooth 83 is integrally fixed on the side of the shaping block 82 facing the stamping groove. The side pressure push block 71 has clearance grooves corresponding one-to-one with the positioning teeth. A second elastic element 84 is provided within the shaping block 82 to drive the shaping block 82 and the shaping tooth 83 into the third mounting groove 81. The second elastic element 84 is a second spring, one end of which is fixedly connected to the bottom wall of the third mounting groove 81, and the other end is fixedly connected to the shaping block 82. In this embodiment, a guide wheel 85 is rotatably mounted on the shaping block 82. After the side pressure push block 71 folds and stamps the flange, the guide inclined surface 711 on the side pressure push block 71 rolls into contact with the guide wheel 85. During the continuous feeding process, the shaping teeth 83 on the shaping block 82 extend out of the third mounting groove 81 and press the edge of the flange, so that the edge of the flange corresponding to the shaping teeth 83 tightly presses the overlapping side plate. The flange metal part is embedded in the side plate at the shaping teeth 83, and the two are simply fixed by simple forging. After the side pressure push block 71 retracts, the shaping teeth 83 retract into the third mounting groove 81 under the action of the second elastic member 84. After the workpiece is lifted from the stamping groove, the flange and the side plate still maintain a connection relationship, which facilitates the maintenance of the shell shape during the subsequent transfer of the battery shell and facilitates the subsequent welding operation of the flange and the side plate. In other embodiments, a recess that mates with the shaping teeth 83 can also be designed on the stamping block 3. This method improves the connection between the flange and the side plate, but it brings problems such as unevenness inside the battery casing and difficulty in demolding the casing from the stamping block 3. It is necessary to control the shape and depth of the recess to avoid the above problems to a certain extent.

[0047] The implementation process of the automatic stamping equipment for lithium battery shell according to the embodiment of the application is as follows: first, the blanked plate is placed on the lower die seat 12, and the plate is positioned by the positioning assembly. Then, the upper forming block 5 is lowered to be flush with the lower end surface of the stamping block 3, the upper pressing seat 11 is lowered, and the reinforcing ribs are pressed on each side plate of the plate under the cooperation of the upper forming block 5 and the lower forming block 6. Subsequently, the upper forming block 5 is raised, each lower forming block 6 is flipped upward around the rotating shaft during the rotation of the inclined support part 611, and the plate is basically folded into a box shape. Then, the upper forming block 5 is lowered to be in contact with the top end of the lower forming block 6, the upper pressing seat 11 and the first displacement block 4 are synchronously lowered, the lower forming block 6 and the battery shell are completely sunk into the stamping groove, and the battery shell is further shaped. During the lowering of the upper pressing seat 11, the inclined support part 611 is rotated and retracted into the lower die seat 12.

[0048] Then, each side pressing push block 71 is synchronously actuated to fold the flange of the battery shell to overlap with the adjacent side plate. The side pressing push block 71 continues to actuate, the shaping teeth 83 on the side edge of the lower forming block 6 are extended out of the lower forming block 6, the flange is engaged and fixed with the side plate. Finally, after the side pressing push block 71 is reset, the shaping teeth 83 are automatically reset, the upper pressing seat 11 and the first displacement block 4 are synchronously raised, the inclined support part 611 is also rotated and raised, the lower forming block 6 is completely raised and separated from the displacement opening 121, under the pushing action of the reset push block 616, the lower forming block 6 is separated from the surface of the battery shell and supported on the inclined support part 611, and then follows the rotation and lowering of the inclined support part 611, the lower forming block 6 is repositioned in the supporting groove 123. After the battery shell is raised from the stamping groove, the upper forming block 5 is lowered relative to the upper pressing seat 11, the upper pressing seat 11 is raised at the same speed, and the battery shell can be pushed off from the stamping block 3, thereby completing the overall stamping process of the lithium battery shell.

[0049] Those skilled in the art will appreciate that, although the preferred embodiments of the application have been described, those skilled in the art can make further changes and modifications to the embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the application. Obviously, those skilled in the art can make various modifications and variations to the application without departing from the spirit and scope of the application. Thus, if these modifications and variations of the application fall within the scope of the claims of the application and equivalent technologies thereof, the application is also intended to include these modifications and variations.

Claims

1. An automatic stamping equipment for lithium battery casings, characterized in that: The utility model relates to a lithium battery shell forming machine, including frame (1), the inside of frame (1) is provided with lower die seat (12) and upper pressing seat (11), and the placement area (13) for workpiece is formed between lower die seat (12) and upper pressing seat (11), be provided with first drive assembly (14) for driving upper pressing seat (11) vertical lift on frame (1); Positioning assembly for positioning metal plate is provided on lower die seat (12), and first let -block (4) and punch block (3) for cooperating and clamping plate to form lithium battery shell lower bottom wall are provided on upper pressing seat (11) and lower die seat (12) respectively, second drive assembly (41) for driving first let -block (4) to lift is provided on lower die seat (12); Upper forming block (5) is provided on the outside of punch block (3) on upper pressing seat (11), and upper forming block (5) is vertically slidably arranged in upper pressing seat (11), third drive assembly (51) for driving upper forming block (5) vertical lift is arranged in upper pressing seat (11), and lower forming block (6) is arranged around first let -block (4) on lower die seat (12), and lower forming block (6) cooperates with upper forming block (5) and forms the reinforcing rib on the side wall of lithium battery shell, and the punch of reinforcing rib is arranged on the bottom wall of upper forming block (5), and fourth drive assembly (61) for driving lower forming block (6) to keep with workpiece in the process of stamping is provided on lower die seat (12) The fourth driving assembly (61) comprises a diagonal support part (611), a let-go opening (121) for the vertical passing of the lower forming block (6) is formed around the first let-go block (4) on the lower die seat (12), a rotating shaft is arranged at one end of the lower forming block (6) close to the first let-go block (4), a strip-shaped groove (122) is vertically formed on the inner wall of the let-go opening (121), the rotating shaft is slidingly arranged in the strip-shaped groove (122), the diagonal support part (611) is rotatably arranged in the lower die seat (12), the diagonal support part (611) is in rolling contact with the bottom wall of the lower forming block (6), the first driving source (613) for driving the diagonal support part (611) to rotate is arranged on the lower die seat (12), the support groove (123) for accommodating and supporting the horizontally arranged forming block (6) is formed on the lower die seat (12), the first mounting groove for accommodating the diagonal support part (611) is formed in the support groove (123), a sliding channel is formed in the first mounting groove, the sliding block (612) is slidingly arranged in the sliding channel, the first driving source (613) is a fourth hydraulic cylinder, the fourth hydraulic cylinder is used for driving the sliding block (612) to move, the transmission rod (614) is hingedly arranged on the sliding block (612), one end of the transmission rod (614) away from the sliding block (612) is hingedly connected with the diagonal support part (611), the second mounting groove (615) is formed on the side of the lower forming block (6) for abutting against the workpiece, the reset push block (616) is slidingly arranged in the second mounting groove (615), the first elastic member (617) for driving the reset push block (616) to extend out of the second mounting groove (615) is arranged in the lower forming block (6); The side pressing assembly (7) for side pressing plate parts to turn up edges so that the turned-up edges are overlapped with adjacent side plates is arranged in the lower die seat (12), the lower forming block (6) comprises two pieces of first forming blocks (62) and two pieces of second forming blocks (63), the side pressing assembly (7) comprises a side pressing push block (71), the side pressing push block (71) is arranged on both sides of each first forming block (62) and is slidingly arranged in the lower die seat (12) along the rotating shaft of the second forming block (63), the fifth driving assembly (72) for driving the side pressing push block (71) to move is arranged in the lower die seat (12).

2. The automatic punching device for lithium battery shell according to claim 1, characterized in that, The first driving assembly (14) comprises a first hydraulic cylinder, the first hydraulic cylinder is fixedly arranged on the rack (1), a plurality of first guide columns (15) are vertically arranged on the rack (1), the upper pressing seat (11) is slidingly arranged on the first guide column (15); The second driving assembly (41) comprises a second hydraulic cylinder, a stamping groove is arranged on the lower die seat (12), the second hydraulic cylinder is fixedly arranged on the lower die seat (12); The third driving assembly (51) comprises a third hydraulic cylinder, the third hydraulic cylinder is fixedly arranged on the upper die seat.

3. The automatic punching device for lithium battery shell according to claim 1, characterized in that, The positioning assembly comprises positioning blocks (2) protruding from the top wall of the lower die seat (12), which are used to match the included angle formed by the flange on the plate and the adjacent side plate.

4. The automatic punching device for lithium battery shell according to claim 1, characterized in that, A plurality of rollers (618) are rotatably arranged on the inclined support part (611) and in rolling contact with the bottom wall of the lower forming block (6).

5. The automatic punching device for lithium battery shell according to claim 4, characterized in that, The side pressing block (71) is provided with a guide slope (711) near the end face of the second forming block (63) and near the edge of the stamping groove.

6. The automatic punching device for lithium battery shell according to claim 5, characterized in that, The lower die seat (12) is provided with third installation grooves (81) on both sides of the corresponding gap (121) of the second forming block (63), the third installation grooves (81) are slidably provided with shaping blocks (82), the shaping blocks (82) are provided with a plurality of shaping teeth (83) for stamping the flange edge, the lower die seat (12) is provided with a second elastic member (84) for driving the shaping block (82) and the shaping teeth (83) to be accommodated into the third installation groove (81), the shaping block (82) is rotatably provided with a guide wheel (85), and the guide wheel (85) is matched with the guide slope (711) to drive the shaping teeth (83) to move out of the third installation groove (81).

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