Lithium battery shell stamping die and stamping equipment and method matched with lithium battery shell stamping die

Abstract

The invention discloses a lithium battery shell stamping die and stamping equipment and method matched with the lithium battery shell stamping die, and relates to the technical field of lithium battery production, the lithium battery shell stamping die comprises a rack, the top of the inner side of the rack is fixedly connected with a lower die, the outer wall of the lower die is fixedly connected with a fixing plate, and the inner side of the lower die is provided with a rectangular workpiece; the device comprises a rack, a plurality of guide columns are arranged, the guide columns are fixedly connected to the inner side of the rack, the outer walls of the guide columns are slidably connected with guide plates, and the bottoms of the guide plates are fixedly connected with connecting blocks. By arranging the limiting mechanism, the four first limiting plates are attached to the face, needing to be formed, of the rectangular workpiece correspondingly, so that the rectangular workpiece is limited in the process of punching a slave plate into a shell, the rectangular workpiece is prevented from deviating in the punching process, and therefore the punching stability of the rectangular workpiece is guaranteed; and therefore, the yield of punch forming of the rectangular workpiece is improved.

Description

Technical Field

[0001] The invention relates to the technical field of lithium battery production, in particular to a lithium battery shell stamping die and a matching stamping device and method. Background Art

[0002] Lithium battery shell stamping refers to the use of a stamping machine to stamp raw materials (such as steel plates, aluminum plates, etc.) to produce a shell that meets 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 the invasion of external substances. The lithium battery shell stamping process needs to meet a series of technical requirements, such as accuracy requirements, surface quality requirements, material utilization requirements, etc. At the same time, it also faces some challenges, such as deformation control during the stamping process, mold wear and replacement, production efficiency and cost control, etc. In order to solve these challenges, it is necessary to continuously optimize the stamping process and equipment to improve production efficiency and product quality.

[0003] In the prior art, a Chinese invention patent with publication number CN111346950B discloses a method, the main points of which are that it includes a device bracket, a lifting bottom frame, a lifting top frame, a diameter-changing mechanism I, a stamping mechanism, a diameter-changing mechanism II, a lateral movement mechanism, an extrusion mechanism and a clamping mechanism. The two ends of the sheet metal can be clamped respectively by two clamping mechanisms, and the radius of the stamped sheet metal can be adjusted by adjusting the change in the relative distance between the two diameter-changing mechanisms I and the two diameter-changing mechanisms II; the lifting top frame is started so that The stamping mechanism moves downward to extrude the sheet metal, and the lifting chassis is started so that the axes of the conical wheels I and II coincide during stamping; while the stamping mechanism is extruding the sheet metal, the two telescopic mechanisms IV are started to reciprocate and telescopically move, driving multiple stamping shafts to move between the conical wheels I, and the multiple stamping shafts extrude the sheet metal; the transverse movement mechanism is started so that the extrusion mechanism covers the outside of the sheet metal to complete the stamping.

[0004] Although the above patent realizes the ability to stamp arc sheet metal parts of different diameters according to different usage requirements, the above patent still has the following problems: During the stamping process, the material is subjected to strong impact force. Since metal materials are prone to generate tangential stress at the edge when subjected to impact force, this tangential stress will cause the material to flow at the edge, thereby forming wrinkles or distortions, so that the stamped product has large defects, resulting in a decrease in the product yield. For this reason, we have designed a lithium battery shell stamping die and corresponding stamping equipment and methods to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a lithium battery shell stamping die and corresponding stamping equipment and method in order to solve the problem that metal materials are prone to generate tangential stress at the edge when subjected to impact force, resulting in wrinkles or distortion of the material at the edge.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lithium battery shell stamping die and a matching stamping device and method, comprising: a frame, the inner top of the frame is fixedly connected to a lower die, the outer wall of the lower die is fixedly connected to a fixing plate, and the inner side of the lower die is provided with a rectangular workpiece; a guide column, a plurality of guide columns are provided, and the guide columns are fixedly connected to the inner side of the frame, the outer wall of the guide column is slidably connected to a guide plate, the bottom of the guide plate is fixedly connected to a connecting block, and the bottom of the connecting block is fixedly connected to a punching head; a hydraulic cylinder, the hydraulic cylinder is installed on the top of the frame, the output end of the hydraulic cylinder passes through the inner side of the frame and is fixedly connected to a driving rod, and the bottom of the driving rod is fixedly connected to the guide plate; a limiting mechanism , the limiting mechanism is arranged on the inner side of the fixed plate, and is used to limit the rectangular workpiece to prevent the rectangular workpiece from shifting during the stamping process. The limiting mechanism includes four first rectangular grooves opened on the inner side of the fixed plate, and the inner side of each of the first rectangular grooves is rotatably connected to a second connecting rod, and the outer wall of each of the second connecting rods is fixedly connected to a first limiting plate; an auxiliary limiting mechanism, the auxiliary limiting mechanism is arranged on the inner side of the first limiting plate, and is used to assist in protecting the corners of the rectangular workpiece; a corner limiting mechanism, the corner limiting mechanism is arranged on the inner side of the first limiting plate, and is used to limit the corners of the rectangular workpiece to prevent the corners of the rectangular workpiece from wrinkling during the stamping process of the rectangular workpiece.

[0007] As a further solution of the present invention: the limiting mechanism also includes a rotating ring rotatably connected to the outer wall of the fixed plate, the top of the rotating ring is fixedly connected with an annular bevel rack, the bottom of the guide plate is fixedly connected with a first spur rack, the inner side of the fixed plate is rotatably connected with four first connecting rods, and the outer wall of each of the first connecting rods is fixedly connected with a bevel gear, and the four bevel gears are all meshed with the annular bevel rack, one of the first connecting rods is fixedly connected with a first spur gear on its outer wall, and the first spur gear is meshed with the annular bevel rack, one end of the first connecting rod is fixedly connected with a worm, and the outer wall of the second connecting rod is fixedly connected with a turbine meshing with the worm.

[0008] As a further solution of the present invention: the auxiliary limiting mechanism includes a third connecting rod slidably connected to the inner side of the first limiting plate, the inner side of the first limiting plate is provided with a groove, the inner side of the groove is slidably connected to a second limiting plate, and the second limiting plate is fixedly connected to the third connecting rod.

[0009] As a further solution of the present invention: the auxiliary limiting mechanism also includes a second rectangular groove opened on the inner side of the first limiting plate, the inner side of the first rectangular groove is fixedly connected to a driving seat, the inner side of the second connecting rod is opened on the inner side of the limiting groove, the inner side of the limiting groove is slidably connected to an L-shaped rod, and the L-shaped rod is fixedly connected to the third connecting rod, a tension spring is installed between the L-shaped rod and the inner side of the limiting groove, and a spherical rod is fixedly connected to one side of the L-shaped rod.

[0010] As a further solution of the present invention: one end of the spherical rod is arranged as a spherical surface, and one end of the driving seat is arranged as an arched inclined surface.

[0011] As a further solution of the present invention: the corner limiting mechanism includes a second damping shaft rotatably connected to the inner side of the second limiting plate, and the outer wall of the second damping shaft is fixedly connected to a third limiting plate.

[0012] As a further solution of the present invention: the corner limiting mechanism also includes a third rectangular groove opened on the inner side of the first limiting plate, the inner side of the third rectangular groove is fixedly connected to a second spur rack, the inner side of the second limiting plate is rotatably connected to a first damping shaft, the outer wall of the first damping shaft is fixedly connected to a second spur gear, and the second spur gear is meshed with the second spur rack, the second spur gear and the outer wall of the second damping shaft are both fixedly connected to a pulley, and belts are installed on the outer walls of the two pulleys, and a storage groove matching the third limiting plate is opened on the inner side of the second limiting plate.

[0013] As a further solution of the present invention: two third connecting rods are arranged on the inner side of the first limiting plate, two driving seats are arranged on the inner side of the first rectangular groove, and the two third connecting rods and the two driving seats are symmetrically arranged with respect to the central axis of the fixing plate.

[0014] The present invention also discloses a lithium battery shell stamping die and a matching stamping method, which uses the lithium battery shell stamping die and the matching stamping equipment, and includes the following steps: S1. First, place the rectangular workpiece to be punched on the top of the lower die, then start the hydraulic cylinder, the output end of the hydraulic cylinder drives the punch head to move downward, when the bottom surface of the punch head contacts the rectangular workpiece, while the rectangular workpiece is being punched, the guide plate drives the first spur rack to move to contact with the first spur gear, when the rectangular workpiece is being punched, the first spur gear is driven to rotate under the action of the first spur rack, thereby driving one of the first connecting rods to drive one of the bevel gears to rotate, thereby driving the annular bevel rack to rotate in a circle, and then under the action of the annular bevel rack The other three bevel gears are driven to rotate synchronously, thereby realizing that the four first connecting rods can rotate synchronously. The first connecting rod rotates while driving the worm to rotate, thereby driving the turbine to drive the first limiting plate to rotate through the second connecting rod. When the rectangular workpiece is gradually stamped and formed, the four first limiting plates are respectively attached to the side of the rectangular workpiece that needs to be formed, thereby limiting the rectangular workpiece in the process of stamping from the plate to the shell, avoiding the rectangular workpiece from shifting during the stamping process, thereby ensuring the stability of the stamping of the rectangular workpiece, and then improving the yield rate of the stamping of the rectangular workpiece; S2. When the second connecting rod rotates, it drives the L-shaped rod to rotate at the same time. When the second connecting rod drives the first limit plate to rotate ten degrees and drives the second limit plate to move out of the inner side of the first rectangular groove, the spherical rod contacts the bottom of the arched slope of the driving seat. As the second connecting rod rotates, the spherical rod gradually moves from the bottom to the top of the arched slope. At this time, under the action of the arched slope, the spherical rod moves toward the side of the L-shaped rod, thereby driving the second limit plate to move toward the bent corner of the rectangular workpiece. The two second limit plates close to each other are squeezed to block the bent corner of the rectangular workpiece, thereby forming a rectangular The bending angle of the workpiece is limited, so that the extrusion stress at the bending corner of the rectangular workpiece away from the top of the lower mold will not be too large to cause wrinkles or cracks, thereby ensuring the stability of the rectangular workpiece during the stamping process. When the L-shaped rod reaches the top of the arched slope, the second limit plate moves to the maximum value. When the spherical rod reaches the top of the arched slope, the second connecting rod continues to rotate, so that the spherical rod moves from the top of the arched slope to the bottom, and the spherical rod is gradually reset under the action of the tension spring. At this time, the second limit plate is reset along with the spherical rod, so that the second limit plate can always be kept around the outer wall of the rectangular workpiece as the stamping progresses of the rectangular workpiece; S3. When the second limiting plate extends out from the inside of the first limiting plate, the first damping shaft is driven to move along with the second limiting plate under the action of the second limiting plate, thereby driving the second spur gear to move. When the second limiting plate moves a certain distance, the second spur gear contacts the second spur rack at the bottom inner side of the third rectangular groove. When the second limiting plate continues to move, the second spur rack drives the second spur gear to rotate the first damping shaft, thereby driving the pulley on the outer wall of the first damping shaft to rotate, thereby driving the belt to move, thereby driving the rotating roller on the outer wall of the second damping shaft to rotate. This in turn drives the second damping shaft to rotate, thereby driving the third limit plate to rotate. When the second limit plate moves to the maximum position, the third limit plate rotates to the maximum angle and fits flush with the corners of the rectangular workpiece, so that when the bent corners of the rectangular workpiece are gradually reduced during the stamping process, the second limit plate is reset at this time, so that the third limit plate is reduced as the angle of the corners of the rectangular workpiece is reduced, so that the third limit plate is always fitted to the corners of the rectangular workpiece, thereby preventing the rectangular workpiece from wrinkling due to excessive extrusion stress at the corners during the stamping process, thereby further ensuring the stability of the stamping of the rectangular workpiece.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. By setting a limiting mechanism, the four first limiting plates are respectively attached to the side of the rectangular workpiece that needs to be formed, so as to limit the rectangular workpiece in the process of stamping from the plate to the shell, and avoid the rectangular workpiece from shifting during the stamping process, thereby ensuring the stability of the rectangular workpiece stamping, and further improving the yield rate of the rectangular workpiece stamping; 2. By setting an auxiliary limiting mechanism, when the second connecting rod rotates, it drives the L-shaped rod to rotate at the same time. When the second connecting rod drives the first limiting plate to rotate ten degrees and drives the second limiting plate to move out of the inner side of the first rectangular groove, the spherical rod contacts the bottom of the arched inclined surface of the driving seat. As the second connecting rod rotates, the spherical rod gradually moves from the bottom to the top of the arched inclined surface. At this time, under the action of the arched inclined surface, the spherical rod moves to one side of the L-shaped rod, thereby driving the second limiting plate to move toward the bent corner of the rectangular workpiece. The bent corners of the rectangular workpiece are squeezed and blocked by two second limiting plates close to each other, thereby limiting the bending angle of the rectangular workpiece, so that the extrusion stress at the bent corners of the rectangular workpiece away from the top of the lower mold will not be too large to cause wrinkles or cracks, thereby ensuring the stability of the rectangular workpiece during the stamping process. 3. By setting a corner limiting mechanism, when the second limiting plate extends out from the inside of the first limiting plate, the first damping shaft is driven to move along with the second limiting plate under the action of the second limiting plate, thereby driving the second spur gear to move; when the second limiting plate moves a certain distance, the second spur gear contacts the second spur rack at the bottom inner side of the third rectangular groove; at this time, when the second limiting plate continues to move, the second spur rack drives the second spur gear to drive the first damping shaft to rotate, thereby driving the pulley on the outer wall of the first damping shaft to rotate, thereby driving the belt to move, thereby driving the rotating roller on the outer wall of the second damping shaft to rotate. When the second limit plate moves to the maximum position, the third limit plate rotates to the maximum angle and fits in the corner of the rectangular workpiece and is flush, so that when the rectangular workpiece is being stamped, the bent corner of the rectangular workpiece gradually decreases. At this time, the second limit plate is reset, so that the third limit plate decreases as the angle of the corner of the rectangular workpiece decreases. In this way, the third limit plate is always fitted in the corner of the rectangular workpiece, thereby preventing the rectangular workpiece from wrinkling due to excessive extrusion stress at the corner during the stamping process, thereby further ensuring the stability of the stamping of the rectangular workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 is a cross-sectional view of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 5 It is a schematic diagram of the rotating ring structure of the present invention; Figure 6 For the present invention Figure 5 Enlarged view of point C in the middle; Figure 7 It is a schematic diagram of the structure of the limiting mechanism of the present invention; Figure 8 It is a structural schematic diagram of the auxiliary limiting mechanism of the present invention; Fig. 9 It is a schematic diagram of punching a rectangular workpiece according to the present invention.

[0017] In the figure: 1, frame; 2, fixed plate; 3, guide column; 4, guide plate; 5, connecting block; 6, punch head; 7, hydraulic cylinder; 8, driving rod; 9, limiting mechanism; 901, rotating ring; 902, first straight rack; 903, first connecting rod; 904, first straight gear; 905, bevel gear; 906, annular bevel rack; 907, worm; 908, turbine; 909, first rectangular groove; 910, first limiting plate; 911, second connecting rod; 10, auxiliary limiting mechanism; 1001, driving Seat; 1002, spherical rod; 1003, L-shaped rod; 1004, limiting slide groove; 1005, second rectangular groove; 1006, tension spring; 1007, third connecting rod; 1008, second limiting plate; 11, corner limiting mechanism; 1101, third rectangular groove; 1102, second spur rack; 1103, second spur gear; 1104, first damping shaft; 1105, belt; 1106, second damping shaft; 1107, third limiting plate; 12, rectangular workpiece; 13, lower mold. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The following is an explanation of an embodiment of the present invention based on the overall structure of the present invention. Example 1

[0020] See also Figures 1 to 9This embodiment provides a lithium battery housing stamping die and a matching stamping device, including: A frame 1, a lower mold 13 is fixedly connected to the inner top of the frame 1, a fixed plate 2 is fixedly connected to the outer wall of the lower mold 13, and a rectangular workpiece 12 is arranged on the inner side of the lower mold 13; A guide column 3, wherein a plurality of guide columns 3 are provided and the guide columns 3 are fixedly connected to the inner side of the frame 1, a guide plate 4 is slidably connected to the outer wall of the guide column 3, a connecting block 5 is fixedly connected to the bottom of the guide plate 4, and a punching head 6 is fixedly connected to the bottom of the connecting block 5; A hydraulic cylinder 7 is installed on the top of the frame 1. The output end of the hydraulic cylinder 7 passes through the inner side of the frame 1 and is fixedly connected to a driving rod 8. The bottom of the driving rod 8 is fixedly connected to the guide plate 4. The limiting mechanism 9 is arranged on the inner side of the fixed plate 2, and is used to limit the rectangular workpiece 12 to prevent the rectangular workpiece 12 from shifting during the stamping process. The limiting mechanism 9 includes four first rectangular grooves 909 opened on the inner side of the fixed plate 2, and the inner side of each first rectangular groove 909 is rotatably connected to a second connecting rod 911, and the outer wall of each second connecting rod 911 is fixedly connected to a first limiting plate 910. The limiting mechanism 9 also includes a rotating ring 901 rotatably connected to the outer wall of the fixed plate 2, and the top of the rotating ring 901 is fixedly connected to an annular bevel rack 906, and the bottom of the guide plate 4 is fixedly connected to a first straight rack 902. The inner side of the fixed plate 2 is rotatably connected to four first connecting rods 903, and the outer wall of each first connecting rod 903 is fixedly connected to a bevel gear 905, and the four bevel gears 905 are all meshed with the annular bevel rack 906, and the outer wall of one of the first connecting rods 903 is fixedly connected to a first straight gear 904, and the first straight gear 904 is fixedly connected to the outer wall of the first connecting rod 904. The gear 904 is meshed with the annular bevel rack 906, one end of the first connecting rod 903 is fixedly connected to a worm 907, and the outer wall of the second connecting rod 911 is fixedly connected to a turbine 908 meshing with the worm 907. The limiting mechanism 9 also includes a rotating ring 901 rotatably connected to the outer wall of the fixed plate 2, the top of the rotating ring 901 is fixedly connected to the annular bevel rack 906, the bottom of the guide plate 4 is fixedly connected to the first straight rack 902, and the inner side of the fixed plate 2 is rotatably connected to four first connecting rods 9 03, and the outer wall of each first connecting rod 903 is fixedly connected with a bevel gear 905, and the four bevel gears 905 are meshed with the annular bevel rack 906, the outer wall of one of the first connecting rods 903 is fixedly connected with a first spur gear 904, and the first spur gear 904 is meshed with the annular bevel rack 906, one end of the first connecting rod 903 is fixedly connected with a worm 907, and the outer wall of the second connecting rod 911 is fixedly connected with a turbine 908 meshed with the worm 907; First, the rectangular workpiece 12 to be punched is placed on the top of the lower die 13, and then the hydraulic cylinder 7 is started. The output end of the hydraulic cylinder 7 drives the punch head 6 to move downward. When the bottom surface of the punch head 6 contacts the rectangular workpiece 12, while the rectangular workpiece 12 is being punched, the guide plate 4 drives the first spur rack 902 to move to contact the first spur gear 904. At this time, when the rectangular workpiece 12 is being punched, the first spur gear 904 is driven to rotate under the action of the first spur rack 902, thereby driving one of the first connecting rods 903 to drive a bevel gear 905 to rotate, thereby driving the annular bevel rack 906 to rotate in a circle, and then driving the annular bevel rack 906 to drive the first bevel gear 904 to rotate in a circle. The other three bevel gears 905 rotate synchronously, thereby realizing the synchronous rotation of the four first connecting rods 903. The rotation of the first connecting rod 903 drives the worm 907 to rotate, thereby driving the turbine 908 to drive the first limit plate 910 to rotate through the second connecting rod 911. When the rectangular workpiece 12 is gradually stamped and formed, the four first limit plates 910 are respectively attached to the side of the rectangular workpiece 12 that needs to be formed, thereby limiting the rectangular workpiece 12 in the process of being stamped from the plate to the shell, avoiding the rectangular workpiece 12 from shifting during the stamping process, thereby ensuring the stability of the stamping of the rectangular workpiece 12, and further improving the yield rate of the stamping of the rectangular workpiece 12. Example 2

[0021] Auxiliary limiting mechanism 10, the auxiliary limiting mechanism 10 is arranged on the inner side of the first limiting plate 910, and is used to assist in protecting the corners of the rectangular workpiece 12. The auxiliary limiting mechanism 10 is arranged on the inner side of the first limiting plate 910, and is used to assist in protecting the corners of the rectangular workpiece 12. The auxiliary limiting mechanism 10 includes a third connecting rod 1007 slidably connected to the inner side of the first limiting plate 910, and a groove is provided on the inner side of the first limiting plate 910, and the inner side of the groove is slidably connected to the second limiting plate 1008, and the second limiting plate 1008 is fixedly connected to the third connecting rod 1007. The auxiliary limiting mechanism 10 also includes A second rectangular groove 1005 is provided on the inner side of the first limiting plate 910, a driving seat 1001 is fixedly connected to the inner side of the first rectangular groove 909, a limiting slide groove 1004 is provided on the inner side of the second connecting rod 911, an L-shaped rod 1003 is slidably connected to the inner side of the limiting slide groove 1004, and the L-shaped rod 1003 is fixedly connected to the third connecting rod 1007, a tension spring 1006 is installed between the L-shaped rod 1003 and the inner side of the limiting slide groove 1004, a spherical rod 1002 is fixedly connected to one side of the L-shaped rod 1003, one end of the spherical rod 1002 is set as a spherical surface, and one end of the driving seat 1001 is set with an arched inclined surface; When the second connecting rod 911 rotates, it drives the L-shaped rod 1003 to rotate. When the second connecting rod 911 drives the first limiting plate 910 to rotate ten degrees and drives the second limiting plate 1008 to move out from the inside of the first rectangular groove 909, the spherical rod 1002 contacts the bottom of the arched slope of the driving seat 1001. As the second connecting rod 911 rotates, the spherical rod 1002 gradually moves from the bottom of the arched slope to the top. At this time, under the action of the arched slope, the spherical rod 1002 moves toward the side of the L-shaped rod 1003, thereby driving the second limiting plate 1008 to move toward the bent corner of the rectangular workpiece 12. The two second limiting plates 1008 close to each other are squeezed to block the bent corners of the rectangular workpiece 12, thereby forming a rectangular workpiece. 12 bending angle is limited, so that the extrusion stress at the bending corner of the rectangular workpiece 12 away from the top of the lower mold 13 will not be too large to cause wrinkles or cracks, thereby ensuring the stability of the rectangular workpiece 12 during the stamping process. When the L-shaped rod 1003 reaches the top of the arched slope, the second limit plate 1008 moves to the maximum value. When the spherical rod 1002 reaches the top of the arched slope, the second connecting rod 911 continues to rotate, so that the spherical rod 1002 moves from the top of the arched slope to the bottom, and the spherical rod 1002 is gradually reset under the action of the tension spring 1006. At this time, the second limit plate 1008 is reset along with the spherical rod 1002, so that the second limit plate 1008 can always remain around the outer wall of the rectangular workpiece 12 as the stamping progresses. Example 3

[0022] The corner limiting mechanism 11 is arranged on the inner side of the first limiting plate 910, and is used to limit the corners of the rectangular workpiece 12 to prevent the corners of the rectangular workpiece 12 from wrinkling during the stamping process of the rectangular workpiece 12. The corner limiting mechanism 11 includes a second damping shaft 1106 rotatably connected to the inner side of the second limiting plate 1008, and the outer wall of the second damping shaft 1106 is fixedly connected to the third limiting plate 1107. The corner limiting mechanism 11 also includes a third rectangular groove 1101 opened on the inner side of the first limiting plate 910, and the inner side of the third rectangular groove 1101 is fixedly connected to the second spur rack 1102, and the inner side of the second limiting plate 1008 is rotatably connected to the first damping shaft 1104, the outer wall of the first damping shaft 1104 is fixedly connected with a second spur gear 1103, and the second spur gear 1103 is meshed with the second spur rack 1102, the second spur gear 1103 and the outer wall of the second damping shaft 1106 are fixedly connected with a pulley, and the outer walls of the two pulleys are installed with belts 1105, the inner side of the second limiting plate 1008 is provided with a storage groove matching the third limiting plate 1107, two third connecting rods 1007 are arranged on the inner side of a first limiting plate 910, and two driving seats 1001 are arranged on the inner side of the first rectangular groove 909, and the two third connecting rods 1007 and the two driving seats 1001 are symmetrically arranged with respect to the central axis of the fixed plate 2; When the second limiting plate 1008 extends out from the inside of the first limiting plate 910, the first damping shaft 1104 is driven to move along with the second limiting plate 1008 under the action of the second limiting plate 1008, thereby driving the second spur gear 1103 to move. When the second limiting plate 1008 moves a certain distance, the second spur gear 1103 contacts the second spur rack 1102 at the bottom inner side of the third rectangular groove 1101. At this time, when the second limiting plate 1008 continues to move, the second spur gear 1103 is driven by the second spur rack 1102 to drive the first damping shaft 1104 to rotate, thereby driving the pulley on the outer wall of the first damping shaft 1104 to rotate, thereby driving the belt 1105 to move, thereby driving the outer wall of the second damping shaft 1106 The rotating roller rotates, thereby driving the second damping shaft 1106 to rotate, thereby driving the third limit plate 1107 to rotate. When the second limit plate 1008 moves to the maximum position, the third limit plate 1107 rotates to the maximum angle and fits in the corners of the rectangular workpiece 12 and is flush, so that the bent corners of the rectangular workpiece 12 gradually decrease during the stamping process. At this time, the second limit plate 1008 is reset, so that the third limit plate 1107 decreases as the angle of the corners of the rectangular workpiece 12 decreases, so that the third limit plate 1107 is always fitted in the corners of the rectangular workpiece 12, thereby preventing the rectangular workpiece 12 from wrinkling due to excessive extrusion stress at the corners during the stamping process, thereby further ensuring the stability of the stamping of the rectangular workpiece 12.

[0023] In combination with the above-mentioned lithium battery shell stamping die and the corresponding stamping equipment, a lithium battery shell stamping die and a corresponding stamping method are provided, which specifically includes the following steps: S1. First, place the rectangular workpiece 12 to be punched on the top of the lower die 13, and then start the hydraulic cylinder 7. The output end of the hydraulic cylinder 7 drives the punch head 6 to move downward. When the bottom surface of the punch head 6 contacts the rectangular workpiece 12, while the rectangular workpiece 12 is being punched, the guide plate 4 drives the first spur rack 902 to move to contact the first spur gear 904. At this time, when the rectangular workpiece 12 is being punched, the first spur gear 904 is driven to rotate under the action of the first spur rack 902, thereby driving one of the first connecting rods 903 to drive a bevel gear 905 to rotate, thereby driving the annular bevel rack 906 to rotate in a circle, and then driving the annular bevel rack 906 to rotate in a circle. The other three bevel gears 905 are driven to rotate synchronously, so that the four first connecting rods 903 can rotate synchronously. The first connecting rod 903 rotates and drives the worm 907 to rotate, thereby driving the turbine 908 to drive the first limiting plate 910 to rotate through the second connecting rod 911. When the rectangular workpiece 12 is gradually stamped and formed, the four first limiting plates 910 are respectively attached to the side of the rectangular workpiece 12 that needs to be formed, so as to limit the rectangular workpiece 12 in the process of stamping from the plate to the shell, so as to avoid the rectangular workpiece 12 from deflecting during the stamping process, thereby ensuring the stamping stability of the rectangular workpiece 12, and then improving the stamping yield rate of the rectangular workpiece 12; S2. When the second connecting rod 911 rotates, it drives the L-shaped rod 1003 to rotate. When the second connecting rod 911 drives the first limiting plate 910 to rotate ten degrees and drives the second limiting plate 1008 to move out from the inside of the first rectangular groove 909, the spherical rod 1002 contacts the bottom of the arched slope of the driving seat 1001. As the second connecting rod 911 rotates, the spherical rod 1002 gradually moves from the bottom of the arched slope to the top. At this time, under the action of the arched slope, the spherical rod 1002 moves toward the side of the L-shaped rod 1003, thereby driving the second limiting plate 1008 to move toward the bent corner of the rectangular workpiece 12. The two second limiting plates 1008 close to each other squeeze the bent corners of the rectangular workpiece 12, thereby forming a rectangular The bending angle of the workpiece 12 is limited, so that the extrusion stress at the bending corner of the rectangular workpiece 12 away from the top of the lower mold 13 will not be too large to cause wrinkles or cracks, thereby ensuring the stability of the rectangular workpiece 12 during the stamping process. When the L-shaped rod 1003 reaches the top of the arched slope, the second limit plate 1008 moves to the maximum value. When the spherical rod 1002 reaches the top of the arched slope, the second connecting rod 911 continues to rotate, so that the spherical rod 1002 moves from the top of the arched slope to the bottom, and the spherical rod 1002 is gradually reset under the action of the tension spring 1006. At this time, the second limit plate 1008 is reset along with the spherical rod 1002, so that the second limit plate 1008 can always be kept around the outer wall of the rectangular workpiece 12 as the stamping progresses of the rectangular workpiece 12; S3. When the second limiting plate 1008 extends out from the inside of the first limiting plate 910, the first damping shaft 1104 is driven to move along with the second limiting plate 1008 under the action of the second limiting plate 1008, thereby driving the second spur gear 1103 to move. When the second limiting plate 1008 moves a certain distance, the second spur gear 1103 contacts the second spur rack 1102 at the bottom inner side of the third rectangular groove 1101. At this time, when the second limiting plate 1008 continues to move, the second spur gear 1103 is driven by the second spur rack 1102 to drive the first damping shaft 1104 to rotate, thereby driving the pulley on the outer wall of the first damping shaft 1104 to rotate, thereby driving the belt 1105 to move, thereby driving the outer wall of the second damping shaft 1106 to rotate. The rotating roller rotates, thereby driving the second damping shaft 1106 to rotate, thereby driving the third limit plate 1107 to rotate. When the second limit plate 1008 moves to the maximum position, the third limit plate 1107 rotates to the maximum angle and fits and flushes with the corners of the rectangular workpiece 12, so that the bent corners of the rectangular workpiece 12 gradually decrease during the stamping process. At this time, the second limit plate 1008 is reset, so that the third limit plate 1107 decreases with the angle of the corners of the rectangular workpiece 12, so that the third limit plate 1107 is always fitted at the corners of the rectangular workpiece 12, thereby preventing the rectangular workpiece 12 from wrinkling due to excessive extrusion stress at the corners during the stamping process, thereby further ensuring the stability of the stamping of the rectangular workpiece 12.

[0024] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Lithium battery housing stamping die and matching stamping equipment, characterized in that: include: A frame (1), wherein a lower mold (13) is fixedly connected to the inner top of the frame (1), a fixed plate (2) is fixedly connected to the outer wall of the lower mold (13), and a rectangular workpiece (12) is arranged on the inner side of the lower mold (13); A guide column (3), wherein a plurality of guide columns (3) are provided, and the guide columns (3) are fixedly connected to the inner side of the frame (1); the outer wall of the guide column (3) is slidably connected to a guide plate (4); the bottom of the guide plate (4) is fixedly connected to a connecting block (5); and the bottom of the connecting block (5) is fixedly connected to a punching head (6); A hydraulic cylinder (7), the hydraulic cylinder (7) being mounted on the top of the frame (1), the output end of the hydraulic cylinder (7) penetrating the inner side of the frame (1) and being fixedly connected to a driving rod (8), and the bottom of the driving rod (8) being fixedly connected to the guide plate (4); a limiting mechanism (9), the limiting mechanism (9) being arranged on the inner side of the fixing plate (2) and being used for limiting the rectangular workpiece (12) to prevent the rectangular workpiece (12) from deflecting during the stamping process, the limiting mechanism (9) comprising four first rectangular grooves (909) arranged on the inner side of the fixing plate (2), the inner side of each of the first rectangular grooves (909) being rotatably connected to a second connecting rod (911), and the outer wall of each of the second connecting rods (911) being fixedly connected to a first limiting plate (910); an auxiliary limiting mechanism (10), the auxiliary limiting mechanism (10) being arranged on the inner side of the first limiting plate (910) and being used to assist in protecting the corners of the rectangular workpiece (12); A corner limiting mechanism (11), the corner limiting mechanism (11) being arranged on the inner side of the first limiting plate (910) and used for limiting the corners of the rectangular workpiece (12) to prevent the corners of the rectangular workpiece (12) from wrinkling during the stamping process of the rectangular workpiece (12).

2. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 1 are characterized in that: The limiting mechanism (9) further comprises a rotating ring (901) rotatably connected to the outer wall of the fixed plate (2); an annular bevel rack (906) is fixedly connected to the top of the rotating ring (901); a first spur rack (902) is fixedly connected to the bottom of the guide plate (4); four first connecting rods (903) are rotatably connected to the inner side of the fixed plate (2); and the outer wall of each of the first connecting rods (903) is fixedly connected to a bevel gear (905); and the four bevel gears (905) are meshed with the annular bevel rack (906); a first spur gear (904) is fixedly connected to the outer wall of one of the first connecting rods (903); and the first spur gear (904) is meshed with the annular bevel rack (906); one end of the first connecting rod (903) is fixedly connected to a worm (907); and the outer wall of the second connecting rod (911) is fixedly connected to a turbine (908) meshed with the worm (907).

3. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 2 are characterized in that: The auxiliary limiting mechanism (10) comprises a third connecting rod (1007) slidably connected to the inner side of the first limiting plate (910), the inner side of the first limiting plate (910) is provided with a groove, the inner side of the groove is slidably connected to a second limiting plate (1008), and the second limiting plate (1008) is fixedly connected to the third connecting rod (1007).

4. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 3 are characterized in that: The auxiliary limiting mechanism (10) further comprises a second rectangular groove (1005) provided on the inner side of the first limiting plate (910); a driving seat (1001) is fixedly connected to the inner side of the first rectangular groove (909); a limiting sliding groove (1004) is provided on the inner side of the second connecting rod (911); an L-shaped rod (1003) is slidably connected to the inner side of the limiting sliding groove (1004); the L-shaped rod (1003) is fixedly connected to the third connecting rod (1007); a tension spring (1006) is installed between the L-shaped rod (1003) and the inner side of the limiting sliding groove (1004); and a spherical rod (1002) is fixedly connected to one side of the L-shaped rod (1003).

5. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 4 are characterized in that: One end of the spherical rod (1002) is provided with a spherical surface, and one end of the driving seat (1001) is provided with an arched inclined surface.

6. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 3 are characterized in that: The corner limiting mechanism (11) comprises a second damping shaft (1106) rotatably connected to the inner side of the second limiting plate (1008), and the outer wall of the second damping shaft (1106) is fixedly connected to a third limiting plate (1107).

7. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 6 are characterized in that: The corner limiting mechanism (11) further comprises a third rectangular groove (1101) provided on the inner side of the first limiting plate (910); a second spur rack (1102) is fixedly connected to the inner side of the third rectangular groove (1101); a first damping shaft (1104) is rotatably connected to the inner side of the second limiting plate (1008); a second spur gear (1103) is fixedly connected to the outer wall of the first damping shaft (1104); the second spur gear (1103) is meshed with the second spur rack (1102); a pulley is fixedly connected to the outer wall of the second spur gear (1103) and the second damping shaft (1106); belts (1105) are installed on the outer walls of the two pulleys; a receiving groove matching the third limiting plate (1107) is provided on the inner side of the second limiting plate (1008).

8. The lithium battery housing stamping die and the corresponding stamping equipment according to claim 7 are characterized in that: Two third connecting rods (1007) are arranged on the inner side of one of the first limiting plates (910), and two driving seats (1001) are arranged on the inner side of the first rectangular groove (909), and the two third connecting rods (1007) and the two driving seats (1001) are symmetrically arranged about the central axis of the fixing plate (2).

9. A lithium battery housing stamping die and a matching stamping method, characterized in that: The lithium battery shell stamping die and the matching stamping equipment according to claim 8 are used, comprising the following steps: S1. First, the rectangular workpiece (12) to be punched is placed on the top of the lower die (13), and then the hydraulic cylinder (7) is started. The output end of the hydraulic cylinder (7) drives the punch head (6) to move downward. When the bottom surface of the punch head (6) contacts the rectangular workpiece (12), while the rectangular workpiece (12) is being punched, the guide plate (4) drives the first spur rack (902) to move to contact the first spur gear (904). At this time, when the rectangular workpiece (12) is being punched, the first spur gear (904) is driven to rotate under the action of the first spur rack (902), thereby driving one of the first connecting rods (903) to drive one of the bevel gears (905) to rotate, thereby driving the annular bevel rack (906) to rotate in a circle, and then the annular bevel rack (906) is driven to rotate in a circle. 6), the other three bevel gears (905) are driven to rotate synchronously, thereby realizing that the four first connecting rods (903) can rotate synchronously, and the first connecting rod (903) rotates while driving the worm (907) to rotate, thereby driving the turbine (908) to drive the first limiting plate (910) to rotate through the second connecting rod (911). When the rectangular workpiece (12) is gradually stamped and formed, the four first limiting plates (910) are respectively attached to the side of the rectangular workpiece (12) that needs to be formed, thereby limiting the position of the rectangular workpiece (12) in the process of being stamped from the plate to the shell, avoiding the rectangular workpiece (12) from deflecting during the stamping process, thereby ensuring the stamping stability of the rectangular workpiece (12), and further improving the stamping yield rate of the rectangular workpiece (12); S2. When the second connecting rod (911) rotates, the L-shaped rod (1003) is driven to rotate. When the second connecting rod (911) drives the first limiting plate (910) to rotate ten degrees and drives the second limiting plate (1008) to move out from the inside of the first rectangular groove (909), the spherical rod (1002) contacts the bottom of the arched inclined surface of the driving seat (1001). As the second connecting rod (911) rotates, the spherical rod (1002) gradually moves from the bottom of the arched inclined surface to the top. At this time, under the action of the arched inclined surface, the spherical rod (1002) moves toward the side of the L-shaped rod (1003), thereby driving the second limiting plate (1008) to move toward the bent corner of the rectangular workpiece (12). The two second limiting plates (1008) close to each other perform extrusion-type blocking on the bent corner of the rectangular workpiece (12), thereby forming a blocking effect on the The bending angle of the rectangular workpiece (12) is limited, so that the extrusion stress at the bending corner of the rectangular workpiece (12) away from the top of the lower mold (13) will not be too large to cause wrinkles or cracks, thereby ensuring the stability of the rectangular workpiece (12) during the stamping process. When the L-shaped rod (1003) reaches the top of the arched slope, the second limiting plate (1008) moves to the maximum value. When the spherical rod (1002) reaches the top of the arched slope, the second connecting rod (911) continues to rotate, so that the spherical rod (1002) moves from the top of the arched slope to the bottom, and under the action of the tension spring (1006), the spherical rod (1002) gradually returns to its original position. At this time, the second limiting plate (1008) returns to its original position along with the spherical rod (1002), so that the second limiting plate (1008) can always remain around the outer wall of the rectangular workpiece (12) as the stamping progresses. S3. When the second limiting plate (1008) extends from the inside of the first limiting plate (910), the first damping shaft (1104) is driven to move along with the second limiting plate (1008) under the action of the second limiting plate (1008), thereby driving the second spur gear (1103) to move. When the second limiting plate (1008) moves a certain distance, the second spur gear (1103) contacts the second spur rack (1102) at the bottom of the inner side of the third rectangular groove (1101). At this time, when the second limiting plate (1008) continues to move, the second spur gear (1103) is driven by the second spur rack (1102) to drive the first damping shaft (1104) to rotate, thereby driving the pulley on the outer wall of the first damping shaft (1104) to rotate, thereby driving the belt (1105) to move, thereby driving the second damping shaft (1104). The rotating roller of the outer wall of the rectangular workpiece (106) rotates, thereby driving the second damping shaft (1106) to rotate, thereby driving the third limit plate (1107) to rotate. When the second limit plate (1008) moves to the maximum position, the third limit plate (1107) rotates to the maximum angle and fits the corner of the rectangular workpiece (12) and is flush, so that when the corner of the rectangular workpiece (12) is gradually reduced during the stamping process, the second limit plate (1008) is reset, so that the third limit plate (1107) is reduced as the angle of the corner of the rectangular workpiece (12) is reduced, so that the third limit plate (1107) is always fitted to the corner of the rectangular workpiece (12), thereby preventing the corner of the rectangular workpiece (12) from being wrinkled due to excessive extrusion stress during the stamping process, thereby further ensuring the stamping stability of the rectangular workpiece (12).

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