Button cell negative electrode gland punch forming die

Abstract

The utility model discloses a button cell cathode gland punch forming die, and relates to the field of button cell processing. The button cell negative electrode gland punch forming die comprises a movable die and a fixed die, a plurality of upper die heads are arranged on the movable die, each upper die head comprises an upper shearing die, a first shaping die and a second shaping die, the fixed die comprises a plurality of lower die heads, and each lower die head comprises a lower shearing die, a first lower shaping die and a second lower shaping die. The upper shearing die and the lower shearing die are matched to enable a blank to be sheared into a primary parison of the workpiece and enable burrs on the outer ring of the primary parison to extend upwards, and the first shaping die and the first lower shaping die are used for secondary forming of the workpiece to enable the burrs to face the inner side of the workpiece after the outer ring of the workpiece is bent upwards. And the second shaping die and the second lower shaping die are used for final forming of the workpiece, so that the cathode shell cover with the depth meeting the use requirement and the outer edge burrs turning inwards is finally formed, and an insulation sealing layer can be prevented from being punctured during assembly.

Description

Technical Field

[0001] The utility model relates to the technical field of button battery processing, in particular to a button battery negative electrode cover stamping die. Background Art

[0002] A button battery is a battery shaped like a "button" and includes a positive electrode shell and a negative electrode cover, with battery filling material between the two. An insulating sealing layer is provided at the fixed position where the negative electrode cover and the positive electrode shell are pressed together. It is usually made of insulating rubber material. During production, the negative electrode cover is stamped into shape by a stamping machine.

[0003] In the prior art, when the negative electrode case cover is stamped and cut, due to the structural characteristics of the cutting die and the stamping process, the upper and lower dies are used for stamping and forming at one time. After forming, the edge of the workpiece is bent, which will form a whole circle of burrs on the outer edge of the negative electrode case cover. There are burrs on the burrs, which are sharp. After bending and forming, the burrs are in an upward and outward spreading state, which is very easy to puncture the insulating sealing layer during the assembly process. Therefore, a button battery negative electrode cover stamping die is provided to solve the above problem. Utility Model Content

[0004] In response to the shortcomings of the existing technology, the utility model provides a button battery negative electrode cover stamping and forming die, which solves the problem in the existing technology that when the negative electrode shell cover is stamped and cut, due to the structural characteristics of the cutting die and the stamping process, the upper and lower dies are used for stamping and forming at one time, and the edge of the workpiece is bent after forming, which will form a whole circle of burrs on the outer edge of the negative electrode shell cover. There are burrs on the burrs, which are sharp. After bending and forming, the burrs are in an upward and outward spreading state, which is very easy to puncture the insulating sealing layer during assembly.

[0005] To achieve the above objectives, the utility model is implemented through the following technical solutions: a button battery negative electrode cover stamping die, including a movable die and a fixed die, the movable die is provided with a plurality of upper die heads, the upper die heads include an upper shearing die, a first shaping die and a second shaping die, the fixed die includes a plurality of lower die heads, the lower die heads include a lower shearing die, a first lower shaping die and a second lower shaping die;

[0006] The upper shearing die and the lower shearing die cooperate to shear the blank into a preliminary blank of the workpiece and extend the burr of its outer ring upward; the first shaping die and the first lower shaping die are used for secondary molding of the workpiece so that the outer ring is bent upward and the burr faces the inner side of the workpiece; the second shaping die and the second lower shaping die are used for the final molding of the workpiece; the interior of the lower shearing die, the first lower shaping die and the second lower shaping die are all provided with shaping taps for inward concave processing of the workpiece.

[0007] Preferably, a top plate is fixedly installed on the top of the plurality of upper mold heads, and a carrier plate is fixedly installed on the bottom of the plurality of lower mold heads.

[0008] Preferably, a limiting shaft is fixedly provided on the top of the carrier plate, and the top plate is slidably connected to the outer surface of the limiting shaft.

[0009] Preferably, a material discharge port is provided on one side of the carrier plate, and a material discharge trough is provided on the side of the second lower integral mold, and the material discharge trough is directly opposite to the material discharge port.

[0010] Preferably, a positioning seat is fixedly installed on the top of the lower shear die, a blank channel is longitudinally opened in the positioning seat, a workpiece transfer channel is transversely opened in the positioning seat, and the workpiece transfer channel vertically penetrates the blank channel.

[0011] Preferably, demoulding pins are slidably provided inside the upper shearing die, the first shaping die and the second shaping die, and demoulding springs are provided on the tops of the demoulding pins.

[0012] Preferably, the interior of the lower shearing die is slidably provided with a pressure-holding meson, and the interiors of the first lower integral die and the second lower integral die are both slidably provided with a demoulding meson.

[0013] Preferably, the shaping taps penetrate the edge pressure meson and the demoulding meson upwards, and the bottoms of the edge pressure meson and the demoulding meson are both provided with ejection springs, and a plurality of the shaping taps are used to deepen the inner concavity of the workpiece multiple times.

[0014] Preferably, the lower shearing die and the upper shearing die are both provided with an oblique cut at one end opposite to each other, and the oblique cut forms an upward-curved burr on the outer edge of the cut surface of the workpiece. The first shaping die and the first lower shaping die are used to bend the burr inward, and a shaping seat is installed on the inner bottom of the second shaping die. The shaping seat and the second lower shaping die trim the burr, and a flanging control plate is provided below the demolding meson in the second lower shaping die, and the flanging control plate is used to control the degree of bending.

[0015] The utility model discloses a button battery negative electrode cover stamping and forming die, which has the following beneficial effects: the blank is sheared into a preliminary blank of a workpiece through the cooperation of an upper shearing die and a lower shearing die, and the burr of the outer ring is extended upward; the first shaping die and the first lower shaping die are used for secondary shaping of the workpiece so that the outer ring is bent upward and the burr is directed to the inner side of the workpiece; the second shaping die and the second lower shaping die are used for the final shaping of the workpiece; the upward concave part in the middle of the workpiece is repeatedly pushed and deformed to deepen it by shaping tapping, so as to finally form a negative electrode shell cover with a depth that meets the use requirements and the outer edge burr is turned inward, which can effectively avoid puncturing the insulating sealing layer during subsequent assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a cross-sectional view of the internal structure of the upper die head and the lower die head of the utility model;

[0018] Figure 2 This is a schematic diagram of the top structure of the carrier plate of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the movable mold and the fixed mold of the utility model;

[0020] Figure 4 This is a schematic diagram of the outer surface structure of the upper die head and the lower die head of the utility model;

[0021] Figure 5 This is a schematic diagram of the overall assembly and application status of the utility model.

[0022] In the figure: 1. Fixed die; 11. Carrier plate; 12. Limiting shaft; 13. Positioning seat; 14. Lower die head; 141. Lower shear die; 142. First lower integral die; 143. Second lower integral die; 144. Binder; 145. Demolding; 146. Ejector spring; 147. Flanging control panel; 148. Shaping tap; 15. Feed chute; 16. Blank channel; 17. Workpiece transfer channel; 18. Feed port.

[0023] 2. Moving mold; 21. Top plate; 22. Upper mold head; 221. Upper shear mold; 222. First shaping mold; 223. Second shaping mold; 224. Demolding pin; 225. Shaping seat; 226. Demolding spring. DETAILED DESCRIPTION

[0024] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described. 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 making any creative efforts are within the scope of protection of the present invention.

[0025] The embodiment of the present application solves the problem in the prior art that, when the negative electrode shell cover is stamped and cut, the upper and lower dies are used for stamping and forming at one time due to the structural characteristics of the cutting die and the stamping process. After forming, the edge of the workpiece is bent, which will form a whole circle of burrs on the outer edge of the negative electrode shell cover. The burrs are sharp and the burrs after bending are in an upward and outward spreading state, which is very easy to puncture the insulating sealing layer during the assembly process.

[0026] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0027] The embodiment of the utility model discloses a stamping die for a negative electrode cover of a button battery.

[0028] According to the attached Figure 1-5 As shown, it includes a movable mold 2 and a fixed mold 1. The movable mold 2 is provided with a plurality of upper mold heads 22. The upper mold head 22 includes an upper shearing mold 221, a first shaping mold 222 and a second shaping mold 223. The fixed mold 1 includes a plurality of lower mold heads 14. The lower mold head 14 includes a lower shearing mold 141, a first lower shaping mold 142 and a second lower shaping mold 143.

[0029] The upper shearing die 221 cooperates with the lower shearing die 141 to shear the blank into a preliminary blank of the workpiece and extend the burr of its outer ring upward. The first shaping die 222 and the first lower shaping die 142 are used for secondary molding of the workpiece so that its outer ring is bent upward and the burr faces the inside of the workpiece. The second shaping die 223 and the second lower shaping die 143 are used for the final molding of the workpiece. The interior of the lower shearing die 141, the first lower shaping die 142 and the second lower shaping die 143 are all provided with shaping taps 148 for inward concave processing of the workpiece.

[0030] A top plate 21 is fixedly mounted on the top of the plurality of upper die heads 22 , and a carrier plate 11 is fixedly mounted on the bottom of the plurality of lower die heads 14 .

[0031] The upper shearing die 221 , the first shaping die 222 and the second shaping die 223 are all fixedly connected to the top plate 21 , and the lower shearing die 141 , the first lower shaping die 142 , the second lower shaping die 143 and the shaping tap 148 are all fixedly arranged on the carrier plate 11 .

[0032] A limit shaft 12 is fixedly provided on the top of the carrier plate 11 , and the top plate 21 is slidably connected to the outer surface of the limit shaft 12 , so as to position the top plate 21 when it moves up and down to prevent it from deflecting.

[0033] A material discharge port 18 is provided on one side of the carrier plate 11 , and a material discharge trough 15 is provided on the side of the second lower integral mold 143 . The material discharge trough 15 faces the material discharge port 18 and is used to discharge the processed workpiece from the second lower integral mold 143 to one side.

[0034] A positioning seat 13 is fixedly installed on the top of the lower shear die 141, and a blank channel 16 is longitudinally opened in the positioning seat 13. A workpiece transfer channel 17 is transversely opened in the positioning seat 13, and the workpiece transfer channel 17 vertically penetrates the blank channel 16. The blank moves forward from the blank channel 16 to realize continuous feeding. A movable push rod is provided in the workpiece transfer channel 17 for pushing the formed workpiece to the next workstation.

[0035] Demolding pins 224 are slidably provided inside the upper shearing die 221 , the first shaping die 222 and the second shaping die 223 , and a demoulding spring 226 is provided on the top of the demoulding pins 224 to prevent the workpiece from being stuck in the upper die head 22 .

[0036] The lower shear die 141 is internally slidingly provided with a pressure-binding meson 144, and the first lower whole die 142 and the second lower whole die 143 are internally slidingly provided with a demoulding meson 145, and a shaping tap 148 passes through the pressure-binding meson 144 and the demoulding meson 145 upward, and a lifting spring 146 is provided at the bottom of the pressure-binding meson 144 and the demoulding meson 145. Multiple shaping taps 148 are used to deepen the degree of internal concavity of the workpiece multiple times, and the workpiece is lifted upward by the lifting spring 146 and the pressure-binding meson 144.

[0037] The lower shearing die 141 and the upper shearing die 221 are both provided with an oblique cut at the opposite end, and the oblique cut makes the outer edge of the cut surface of the workpiece cut form an upward-curved burr. The first shaping die 222 and the first lower shaping die 142 are used to bend the burr inward. The inner bottom of the second shaping die 223 is equipped with a shaping seat 225. The shaping seat 225 and the second lower shaping die 143 trim the burr, and a flanging control plate 147 is provided under the demolding meson 145 in the second lower shaping die 143. The flanging control plate 147 is used to control the degree of bending.

[0038] Working principle: During the stamping process, the blank first passes through the positioning seat 13, and the blank is located on the top of the lower shearing die 141. At this time, as the top plate 21 moves downward, the upper shearing die 221 is driven to move downward, and the upper shearing die 221 is abutted against the lower shearing die 141 to achieve the punching and cutting of the workpiece, so that the workpiece enters the lower shearing die 141. At the same time, the oblique cut makes the top of the cut surface of the workpiece form a burr that is tilted outward and upward. When the workpiece falls into the lower shearing die 141, the upper shearing die 221 is abutted against the outer ring of the top of the pressure meson 144, which presses the outside of the workpiece. The edge is extruded, and as the upper shear die 221 continues to move downward, the ejecting spring 146 is compressed. At this time, the upper shear die 221 and the edge pressure meson 144 clamp the workpiece and move it downward. At this time, the shaping tap 148 pushes the workpiece from the middle and deforms it into the interior of the upper shear die 221, so that the workpiece forms a state in which the middle part is convex upward. Then the upper shear die 221 is reset. At this time, the ejecting spring 146 pushes the workpiece upward, and at the same time, the demoulding spring 226 ejects the workpiece from the upper shear die 221, completing the first stage of workpiece cutting and preliminary forming.

[0039] Then the workpiece is pushed onto the first lower shaping die 142. At this time, the top plate 21 moves down again, and the workpiece is pushed into the first lower shaping die 142 through the first shaping die 222. At this time, the horizontal side of the workpiece is folded upward from the middle by the action of the first shaping die 222 and the groove at the top of the first lower shaping die 142. At the same time, the burr formed in the first step is directed toward the inside of the workpiece, and the shaping tap 148 is used to deepen the groove in the middle of the workpiece.

[0040] At this time, the top plate 21 moves up and pushes the workpiece to the position of the second lower shaping die 143. At this time, the top plate 21 moves down again, and the second lower shaping die 143 of the shaping seat 225 performs the final shaping on the workpiece, so that the outer edge of the workpiece is bent more in place, and the front is facing inward. At the same time, the shaping tap 148 is used to adjust the final depth of the groove in the middle of the workpiece, and the final molding extrusion amount is ensured by the flanging control plate 147 to ensure that the final molded part meets the design requirements. Then the top plate 21 moves up and pushes the final molded workpiece to the discharge port 18 to discharge the material outward.

[0041] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in this invention is defined by the appended claims and their equivalents.

Claims

1. A button cell negative electrode cover stamping die, comprising a movable die (2) and a fixed die (1), characterized in that: The movable mold (2) is provided with a plurality of upper mold heads (22), the upper mold heads (22) including an upper shearing mold (221), a first shaping mold (222) and a second shaping mold (223); the fixed mold (1) includes a plurality of lower mold heads (14), the lower mold heads (14) including a lower shearing mold (141), a first lower shaping mold (142) and a second lower shaping mold (143); The upper shearing die (221) and the lower shearing die (141) cooperate to shear the blank into a preliminary blank of the workpiece and extend the burr of its outer ring upward; the first shaping die (222) and the first lower shaping die (142) are used for secondary molding of the workpiece so that the outer ring is bent upward and the burr faces the inner side of the workpiece; the second shaping die (223) and the second lower shaping die (143) are used for the final molding of the workpiece; the interiors of the lower shearing die (141), the first lower shaping die (142) and the second lower shaping die (143) are all provided with shaping taps (148) for inward concave processing of the workpiece.

2. The button cell negative electrode cover stamping die according to claim 1, characterized in that: A top plate (21) is fixedly mounted on the top of the plurality of upper die heads (22), and a carrier plate (11) is fixedly mounted on the bottom of the plurality of lower die heads (14).

3. The button cell negative electrode cover stamping die according to claim 2, characterized in that: A limiting shaft (12) is fixedly provided on the top of the carrier plate (11), and the top plate (21) is slidably connected to the outer surface of the limiting shaft (12).

4. The button cell negative electrode cover stamping die according to claim 2, characterized in that: A material discharge port (18) is provided on one side of the carrier plate (11), and a material discharge trough (15) is provided on the side of the second lower integral mold (143), and the material discharge trough (15) is directly opposite to the material discharge port (18).

5. The button cell negative electrode cover stamping die according to claim 1, characterized in that: A positioning seat (13) is fixedly installed on the top of the lower shear die (141), a blank channel (16) is longitudinally opened in the positioning seat (13), a workpiece transfer channel (17) is transversely opened in the positioning seat (13), and the workpiece transfer channel (17) vertically penetrates the blank channel (16).

6. The button cell negative electrode cover stamping die according to claim 1, characterized in that: Demolding pins (224) are slidably provided inside the upper shearing die (221), the first shaping die (222) and the second shaping die (223), and a demoulding spring (226) is provided on the top of each of the demoulding pins (224).

7. The button cell negative electrode cover stamping die according to claim 1, characterized in that: The lower shearing die (141) is internally provided with a pressing meson (144) for sliding, and the first lower integral die (142) and the second lower integral die (143) are internally provided with a demoulding meson (145) for sliding.

8. The button cell negative electrode cover stamping die according to claim 7, characterized in that: The shaping tap (148) penetrates the edge pressing meson (144) and the demoulding meson (145) upwards, and the bottoms of the edge pressing meson (144) and the demoulding meson (145) are both provided with a lifting spring (146). Multiple shaping taps (148) are used to deepen the inner concavity of the workpiece multiple times.

9. The button cell negative electrode cover stamping die according to claim 1, characterized in that: The lower shearing die (141) and the upper shearing die (221) are both provided with an oblique cut at one end, through which the workpiece is cut and the burr is bent upward. A shaping seat (225) is installed at the inner bottom of the second shaping die (223). The shaping seat (225) and the second lower shaping die (143) trim the burr, and a flanging control plate (147) is provided below the demoulding meson (145) in the second lower shaping die (143). The flanging control plate (147) is used to control the degree of bending.

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