Punching die and processing equipment

Abstract

The present application relates to the technical field of stamping equipment, in particular to a stamping die and processing equipment; the difference between the maximum distance and the minimum distance of the profile line of the first die hole and the second die hole on the supporting surface to the side of the pressing block close to the supporting table is controlled, so that the material belt is attached to the profile line of the first die hole and the second die hole on the supporting surface, thereby ensuring that the material belt is tightly fixed on the stamping die, avoiding that the height difference of the profile line of the first die hole and the second die hole on the supporting surface is too large, so that the material belt is released from the tight state when the cutter is at the low part of the profile line, thereby reducing the generation of diaphragm piece burrs.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping equipment, and in particular to a stamping die and processing equipment. Background Art

[0002] During the battery processing process, the positive and negative electrodes are stacked with a diaphragm sheet between them, and then heated and pressurized to form a battery cap. In order to prevent short circuit between the positive and negative electrodes, the diaphragm sheet needs to be positioned and placed between the positive and negative electrodes. The diaphragm sheet is usually formed by shearing or punching from a strip in a specific factory. In the existing stamping die, the stamped diaphragm sheet is prone to burrs. The current battery specifications are all small-scale designs with high requirements for dimensional precision. The diaphragm sheet with burrs is not conducive to the positioning and fitting between the positive and negative electrodes, and is likely to affect the pressing effect of the battery cap. Summary of the Invention

[0003] The main purpose of the present invention is to propose a stamping die, which aims to solve the technical problem of how to improve the burrs generated when the diaphragm is produced on the production line.

[0004] To achieve the above-mentioned purpose, the stamping die proposed in the present invention is used to punch the material strip into an annular diaphragm sheet, and a hollow area is formed inside the diaphragm sheet; the stamping die comprises: a support platform, a pressure block and a die tool, the support platform has a support surface, and the support surface is provided with a first die hole and a second die hole; the pressure block is movably mounted on the support platform and is located on one side of the support surface so as to approach or move away from the support surface; the pressure block is used to press the material strip onto the support surface so that the material strip covers the first die hole and the second die hole; the die tool comprises a first tool and a second tool, and the cutting area of ​​the second tool is larger than the cutting area of ​​the first tool; the first tool is movably mounted on the support platform and is arranged opposite to the first die hole so as to extend into or out of the first die hole; the second tool It is movably mounted on the support platform and arranged opposite to the second die hole so as to extend into or exit the second die hole; the first tool is used to cut a hollow area from the material strip when extending into the first die hole; the second tool is used to extend into the second die hole when the hollow area falls into the projection of the second die hole, so as to cut the diaphragm sheet from the periphery of the hollow area of ​​the material strip; wherein, in the movement direction of the pressing block, the maximum distance between the contour line of the first die hole on the support surface and the side of the pressing block close to the support platform is a, and the minimum distance is b, satisfying ab<0.2; in the movement direction of the pressing block, the maximum distance between the contour line of the second die hole on the support surface and the side of the pressing block close to the support platform is c, and the minimum distance is d, satisfying the maximum distance cd<0.2.

[0005] Optionally, the second tool is provided with a connected air hole and an air channel, the air hole is provided at the blade end of the second tool; a vacuum mechanism, the vacuum mechanism is installed on the support table, the air channel is connected to the vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum degree of the air channel.

[0006] Optionally, a collection trough is formed in the support platform, and the collection trough is located below the first die hole and is connected to the first die hole; the stamping die also includes a collection piece that can be detachably installed below the support platform, and a feed hole is provided at the bottom of the collection trough, and the collection piece is connected to the feed hole, and the collection piece is used to receive the scraps from the collection trough.

[0007] Optionally, a blowing channel is formed in the support platform, and the blowing channel is connected to the collection trough. The stamping die also includes a gas drive device, and the gas drive device is connected to the blowing channel to blow the scraps in the collection trough toward the feed hole.

[0008] Optionally, a sloped surface is formed at the bottom of the aggregate trough, and the feed hole is arranged at the bottom of the sloped surface.

[0009] Optionally, the second tool includes a cutting part and a guide part, the cutting part is arranged in a ring on the guide part, the air hole is arranged on the cutting part, the guide part protrudes from the cutting part, and the cross-sectional shape of the guide part is consistent with the cross-sectional shape of the first tool; the guide part is used to extend into the hollow area of ​​the material strip before the cutting part cuts the diaphragm sheet from the periphery of the hollow area of ​​the material strip.

[0010] Optionally, the support surface is provided with a material trough, which is used to feed the material belt to move, and the first die hole and the second die hole are opened at the bottom of the material trough; the pressing block includes a crimping part, which is used to press the material belt to the bottom of the material trough.

[0011] Optionally, the stamping die also includes a limiting piece, the limiting piece is provided with a limiting portion, the pressure block is provided with a through hole, one end of the limiting piece is connected to the mounting piece, and the other end is inserted into the through hole, and the limiting portion is supported against the pressure block; the limiting piece is used to limit the penetration depth of the first tool and the second tool in the first conductive hole and the second conductive hole.

[0012] Optionally, the stamping die also includes a mounting part, which is arranged on the side of the pressure block away from the support platform, and the die tool is installed on the mounting part. The pressure block is provided with a first conductive hole and a second conductive hole, the first conductive hole is arranged opposite to the first die hole, and the second conductive hole is arranged opposite to the second die hole, the first tool is plugged into and matched with the first conductive hole, and the second tool is plugged into and matched with the second conductive hole.

[0013] The present invention also provides a processing device, which includes the stamping die described above.

[0014] In the stamping die of the present invention, the difference between the maximum distance and the minimum distance from the contour lines of the first die hole and the second die hole on the support surface to the side of the pressure block close to the support platform is controlled so that the material strip fits the contour lines of the first die hole and the second die hole on the support surface, thereby ensuring that the material strip is tautly fixed on the stamping die, avoiding the height difference of the contour lines of the first die hole and the second die hole on the support surface being too large, which causes the material strip to be released from the taut state when the tool is at a low position of the contour line, thereby reducing the generation of burrs on the diaphragm. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] 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 the structures shown in these drawings without paying any creative work.

[0016] Figure 1 Schematic diagram of the process of cutting the material strip into the diaphragm sheet in the present invention;

[0017] Figure 2 It is a structural schematic diagram of an embodiment of a stamping die of the present invention;

[0018] Figure 3 A first cross-sectional view of an embodiment of a stamping die of the present invention;

[0019] Figure 4 for Figure 3 A partial enlarged view of point A in the middle;

[0020] Figure 5 A second cross-sectional view of an embodiment of a stamping die of the present invention;

[0021] Figure 6 for Figure 5 A partial enlarged view of point B in the middle;

[0022] Figure 7 Schematic diagram of the structure of the second tool in the present invention;

[0023] Figure 8 is a cross-sectional view of the second tool in the present invention;

[0024] Figure 9 This is the third cross-sectional view of the stamping die embodiment of the present invention.

[0025] Description of Figure Numbers:

[0026] Label name Label name Label name 10 Material Strip 11 Hollow area 12 diaphragm 20 Support platform 21 Support surface 22 First punch hole 23 Second punch hole 30 Briquetting 41 First tool 42 Second tool 421 Air hole 422 Air passage 24 Aggregate trough 50 Aggregates 241 Feed hole 25 Air blowing channel 242 Slope surface 423 Cutting Department 424 Guide 26 Feed chute 31 Crimping part 60 Mounting parts 32 First via hole 33 Second via hole 70 Limiting parts 34 Via 71 Limiting part

[0027] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0028] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention provides a stamping die for stamping a material strip 10 into an annular diaphragm sheet 12 , wherein a hollow area 11 is formed inside the diaphragm sheet 12 .

[0032] In the embodiment of the present invention, Figures 2 to 4 As shown, Figure 2This is a structural diagram of an embodiment of a stamping die of the present invention; Figure 3 A first cross-sectional view of an embodiment of a stamping die of the present invention; Figure 4 for Figure 3 A partial enlarged view of point A in the middle.

[0033] The stamping die includes a support platform 20, a pressure block 30, a die cutter, and a vacuum mechanism. The support platform 20 has a support surface 21, which is provided with a first die hole 22 and a second die hole 23. The pressure block 30 is movably mounted on the support platform 20 and is located on one side of the support surface 21 so as to be closer to or farther away from the support surface 21. The pressure block 30 is used to press the material strip 10 onto the support surface 21 so that the material strip 10 covers the first die hole 22 and the second die hole 23. The die cutter includes a first cutter 41 and a second cutter 42. The cutting area of ​​the second cutter 42 is larger than that of the first cutter 41. The first cutter 41 is movably mounted on the support platform 20 and is disposed opposite the first die hole 22 so as to extend into or out of the first die hole 22. The second cutter 42 is movably mounted on the support platform 20 and is disposed opposite the second die hole 23 so as to extend into or out of the second die hole 23. The first cutter 41 is used to cut out the hollow area 11 from the material strip 10 when it extends into the first die hole 22, and the second cutter 42 is used to extend into the second die hole 23 when the hollow area 11 falls into the projection of the second die hole 23, so as to cut the diaphragm sheet 12 from the periphery of the hollow area 11 of the material strip 10.

[0034] In the direction of movement of the pressing block 30, the maximum distance between the contour line of the first punch hole 22 on the support surface 21 and the side of the pressing block 30 close to the support platform 20 is a, and the minimum distance is b, satisfying ab≤0.2. In the direction of movement of the pressing block 30, the maximum distance between the contour line of the second punch hole 23 on the support surface 21 and the side of the pressing block 30 close to the support platform 20 is c, and the minimum distance is d, satisfying the maximum distance cd≤0.2.

[0035] During the stamping process of the stamping die, taking the first die hole 22 and the first tool 41 as an example, if there is a height difference in the contour line of the first die hole 22 on the support surface 21, then the first tool 41 will first contact the side with the higher contour line when cutting the material strip 10, and cut it locally. At this time, the scraps are partially separated from the material strip 10. At this time, only the side of the material strip 10 on the side with the lower contour line away from the first die hole 22 is pressed on the support surface 21, and the scraps projected on the first die hole 22 lose their supporting effect due to being partially sheared. When the first tool 41 cuts the side with the lower contour line of the material strip 10, the forces on both sides of the blade are uneven, and the scraps are easy to tilt and bend. At this time, the first tool 41 is easy to shear and form burrs. Therefore, this application limits the difference between the maximum distance and the minimum distance between the contour line of the first die hole 22 on the support surface 21 and the side of the pressure block 30 close to the support platform 20, which greatly reduces the generation of burrs during the cutting process, thereby ensuring the quality of the diaphragm 12 and facilitating the processing of downstream products.

[0036] Furthermore, when processing the stamping die parts, the maximum distance and minimum distance between the contour line of the first die hole 22 and the second die hole 23 on the support surface 21 and the side of the press block 30 close to the support table 20 can be controlled by improving the part accuracy of the press block 30 and the support table 20. For example, the processing accuracy of the processing equipment is improved. In actual processing, CNC milling machines are mostly used for processing. At this time, the processing accuracy can be ensured by adjusting the feed amount and feed speed of the milling cutter during fine milling, or after milling is completed, fine processing can be performed again on processing equipment with higher plane processing accuracy such as a grinder. However, it should be understood that this application does not limit the specific processing method of the press block 30 and the support table 20, so that the maximum distance and minimum distance difference between the contour line of the first die hole 22 and the second die hole 23 on the support surface 21 and the side of the press block 30 close to the support table 20 can be within the set range.

[0037] In this embodiment, the annular diaphragm 12 is taken as a concentric circular ring as an example for explanation. It should be understood that in other embodiments of the present application, the diaphragm 12 can also be a polygonal annular structure or an eccentric circular ring, and it is only necessary to change the specific shape and relative position of the first tool 41 and the second tool 42.

[0038] The second tool 42 is provided with a connected air hole 421 and an air channel 422. The air hole 421 is provided at the blade end of the second tool 42. A vacuum mechanism is mounted on the support platform 20. The air channel 422 is connected to the vacuum port of the vacuum mechanism. The vacuum mechanism is used to adjust the vacuum level of the air channel 422. After the second tool 42 cuts the diaphragm sheet 12 from the material strip, the vacuum mechanism can be used to suck the diaphragm sheet 12 onto the second tool 42, thereby achieving the positioning production of the diaphragm sheet 12. Subsequently, the diaphragm sheet 12 on the second tool 42 can be directly transported to subsequent processing equipment for processing without the need for positioning and loading.

[0039] In this embodiment, the support surface 21 can be the top surface of the support platform 20 or the side surface of the support platform 20. In this embodiment, the support surface 21 is taken as the top surface of the support platform 20. The material strip 10 can move along the support surface 21. The first die hole 22 and the second die hole 23 are arranged along the movement direction of the material strip 10, that is, when the material strip 10 moves along the support surface 21, it first passes through the first die hole 22 and then passes through the second die hole 23. The movement direction of the pressing block 30 is perpendicular to the support surface 21. For example, the pressing block 30 is installed above the support surface 21 and can move up and down in the vertical direction. When the pressing block 30 abuts the support surface 21, it can press the material strip 10. When the pressing block 30 leaves the support surface 21, it can release the material strip 10. The stamping die also includes a first drive device installed on the support platform 20. The first drive device is used to drive the pressing block 30 to move, so that the pressing block 30 can press or release the material strip 10.

[0040] The first cutter 41 and the second cutter 42 are mounted above the support surface 21 and can move up and down along the axial direction of the first die hole 22 and the second die hole 23. The first cutter 41 and the second cutter 42 are arranged in a columnar shape. The blade of the first cutter 41 is arranged on the periphery of the end face of the first cutter 41, and the blade of the second cutter 42 is arranged on the periphery of the end face of the second cutter 42. The end face of the second cutter 42 is larger than the end face of the first cutter 41, so the cutting range of the second cutter 42 will be larger than the cutting range of the first cutter 41. The stamping die also includes a second drive device mounted on the support table 20, and the second drive device is used to drive the first cutter 41 and the second cutter 42 to move, so that the first cutter 41 and the second cutter 42 cut the material strip 10.

[0041] like Figure 7 and Figure 8 As shown, Figure 7 Schematic diagram and cross-sectional view of the structure of the second tool 42 in the present invention; Figure 8It is a cross-sectional view of the second tool in the present invention. The air passage 422 extends along the axial direction of the second tool 42 and passes through the end of the second tool 42 away from its blade. The vacuum port of the vacuum mechanism is connected to the air passage 422 through the top of the second tool 42. The vacuum mechanism can generate negative pressure at the air hole 421 by adjusting the vacuum degree of the air passage 422, thereby adsorbing the diaphragm 12 cut by the second tool 42. The number of air holes 421 can be multiple, and the multiple air holes 421 are arranged at intervals along the circumference of the second tool 42. The number and position of the air passages 422 correspond to the air holes 421, and the air outlet of the vacuum mechanism is connected to the multiple air passages 422 at the same time. In this way, the adsorption position of the diaphragm 12 can be increased, so that the force on the diaphragm 12 is balanced, thereby improving the adsorption stability of the diaphragm 12.

[0042] Please also refer to Figure 1 、 Figure 5 and Figure 6 , Figure 1 Schematic diagram of the process of cutting the material strip 10 to remove the diaphragm sheet 12 in the present invention; Figure 5 A second cross-sectional view of an embodiment of a stamping die of the present invention; Figure 6 for Figure 5 A partial enlarged view of point B in the middle.

[0043] During stamping, the material strip 10 passes through the first die hole 22. Once the material strip 10 covers the first die hole 22, the pressing block 30 descends to hold the material strip 10 in place, ensuring that the material strip 10 does not shift or deform under the force of the stamping tool. After the pressing block 30 holds the material strip 10 in place, the first tool 41 extends into the first die hole 22 and pierces the material strip 10, removing the scrap material from the material strip 10. This creates a hollowed-out area 11 in the material strip 10, created by the first tool 41.

[0044] After the hollowed-out area 11 is cut out of the strip 10, the first cutter 41 exits the first die hole 22, the pressing block 30 releases the strip 10, and the strip 10 continues to move toward the second die hole 23. When the strip 10 moves to the point where the hollowed-out area 11 is within the projection of the second die hole 23, the pressing block 30 presses the strip 10 again. At this time, the second cutter 42 extends into the second die hole 23 and cuts out the annular diaphragm sheet 12 from the outer periphery of the hollowed-out area 11 on the strip 10.

[0045] When the second tool 42 cuts the diaphragm 12, the vacuum mechanism is turned on to increase the vacuum degree of the air passage 422. At this time, the air hole 421 generates negative pressure on the diaphragm 12, so that the diaphragm 12 can be adsorbed and fixed on the second tool 42. After the diaphragm 12 is adsorbed and fixed, the second tool 42 can transfer the diaphragm 12 to the production line of the battery cap and directly stack the diaphragm 12 on the electrode sheet. Of course, if the coaxiality deviation between the electrode sheets is allowed, the supporting fixture carrying the electrode sheet can also be directly transported to the bottom of the second tool 42, and then the vacuum mechanism is closed, the air hole 421 and the air passage 422 are broken, and the diaphragm 12 can fall directly on the electrode sheet.

[0046] The number of the first die holes 22 and the second die holes 23 can be multiple, and the multiple first die holes 22 and the second die holes 23 are arranged along the movement direction of the material strip 10. The number and position of the first cutter 41 and the second cutter 42 correspond to the first die holes 22 and the second die holes 23, respectively. In this way, the multiple first cutters 41 can move at the same time and cut out multiple hollow areas 11 from the material strip 10 at one time. The multiple second cutters 42 can also move at the same time and cut out multiple diaphragm sheets 12 from the material strip 10 at one time, thereby improving the production efficiency of the stamping die. It should be understood that the multiple second cutters 42 are each provided with a corresponding air hole 421 and an air channel 422, and the vacuum mechanism can be connected to the air channel 422 of the multiple second cutters 42 at the same time.

[0047] The scraps cut from the material strip 10 by the first cutter 41 can be directly dropped from the support table 20, or can be collected uniformly by setting a collection structure. Figure 4 and Figure 6 As shown, a collecting trough 24 is formed in the support platform 20 . The collecting trough 24 is located below the first punch hole 22 and communicates with the first punch hole 22 . The collecting trough 24 is used to receive the scraps cut from the material strip 10 by the first tool 41 .

[0048] The collecting trough 24 can collect the scraps cut from the material strip 10 each time, facilitating subsequent unified processing. It is understood that when there are multiple first die holes 22, the multiple first die holes 22 can be connected to the same collecting trough 24 to simplify the internal structure of the support platform 20.

[0049] Specifically, such as Figure 4 and Figure 6As shown, the stamping die also includes a material collecting member 50 that is detachably mounted below the support platform 20. The bottom of the material collecting trough 24 is provided with a feed hole 241. The material collecting member 50 is connected to the feed hole 241 and is used to receive the waste materials from the material collecting trough 24. After the waste materials enter the material collecting trough 24, they can further fall into the material collecting member 50. In this way, when the waste materials in the material collecting member 50 accumulate to a certain amount, the user can remove the material collecting member 50 to pour out the waste materials for disposal.

[0050] Since the weight of the scraps is small, it is difficult for them to fall naturally into the collecting member 50 under the action of gravity, and thus they are easily blocked in a local position of the collecting trough 24. For example, Figure 4 and Figure 6 As shown, a blowing channel 25 is formed in the support platform 20, and the blowing channel 25 is connected to the collection trough 24. The stamping die also includes a gas drive device, which is connected to the blowing channel 25 to blow the scraps in the collection trough 24 to the feed hole 241. The blowing channel 25 can penetrate the side trough wall of the collection trough 24. Every time scraps fall into the collection trough 24, the gas drive device can blow air towards the collection trough 24, so that the scraps can be blown away or blown to the feed hole 241 under the action of the airflow, thereby preventing the scraps from clogging the collection trough 24.

[0051] The bottom of the aggregate trough 24 can be horizontal or inclined. Figure 4 and Figure 6 As shown, the bottom of the collecting trough 24 is formed with a slope surface 242, and the feeding hole 241 is provided at the bottom of the slope surface 242. Thus, the scraps can slide along the slope surface 242 to the feeding hole 241 under the action of gravity, thereby improving the collection effect of the scraps.

[0052] For example, Figure 7 As shown, the second cutter 42 includes a cutting portion 423 and a guide portion 424. The cutting portion 423 is annularly disposed around the guide portion 424, and the air hole 421 is disposed in the cutting portion 423. The guide portion 424 protrudes from the cutting portion 423, and the cross-sectional shape of the guide portion 424 is consistent with the cross-sectional shape of the first cutter 41. The guide portion 424 is configured to extend into the hollowed-out region 11 of the material strip 10 before the cutting portion 423 cuts the diaphragm sheet 12 from the outer periphery of the hollowed-out region 11 of the material strip 10, thereby further ensuring the shape accuracy of the diaphragm sheet 12.

[0053] The blade of the second cutter 42 is located at the outer periphery of the cutting portion 423, and the cross-sectional shape of the guide portion 424 can be consistent with the cross-sectional shape of the first cutter 41. After the second cutter 42 cuts the diaphragm sheet 12 from the material strip 10, the guide portion 424 is inserted into the diaphragm sheet 12, thereby positioning the diaphragm sheet 12 in the radial direction. When the electrode sheet-carrying jig comes under the second cutter 42, the end of the guide portion 424 can first approach the electrode sheet, and then the diaphragm sheet 12 can fall onto the electrode sheet along the guide portion 424. This can improve the positional accuracy of the diaphragm sheet 12 when stacked with the electrode sheet, thereby improving the pressing effect.

[0054] For example, Figure 2 and Figure 4 As shown, the support surface 21 is provided with a trough 26 for feeding the material strip 10 to move, and the first die hole 22 and the second die hole 23 are provided at the bottom of the trough 26. The pressing block 30 includes a crimping portion 31, which is used to press the material strip 10 to the bottom of the trough 26. The trough 26 extends along the arrangement direction of the first die hole 22 and the second die hole 23. The material strip 10 is fed into the trough 26, so that the material strip 10 can be easily limited to prevent it from deviating from the first die hole 22 and the second die hole 23. It should be understood that at this time, the support surface 21 is the bottom of the trough 26, and the contour lines of the first die hole 22 and the second die hole 23 on the support surface 21 are the contour lines at the bottom of the trough 26. At this time, the reference plane for calculating the contour line distance is the end face of the crimping portion 31, that is, the side of the crimping portion 31 close to the trough 26.

[0055] The pressing block 30 can be provided on one side of the first cutting tool 41 and the second cutting tool 42 to avoid the first cutting tool 41 and the second cutting tool 42 while pressing and consolidating the material strip 10. Of course, the pressing block 30 can also avoid the first cutting tool 41 and the second cutting tool 42 in other ways. For example, two pressing blocks 30 can be provided, and the two pressing blocks 30 can be provided on both sides of the arrangement direction of the first cutting tool 41 and the second cutting tool 42 to achieve the pressing and consolidation of the material strip 10.

[0056] For example, Figure 2 and Figure 4 As shown, the stamping die also includes a mounting part 60, which is arranged on the side of the pressure block 30 away from the support platform 20, and the die tool is installed on the mounting part 60. The pressure block 30 is provided with a first conductive hole 31 and a second conductive hole 33. The first conductive hole 31 is arranged opposite to the first die hole 22, and the second conductive hole 33 is arranged opposite to the second die hole 23. The first tool 41 is plugged into the first conductive hole 31, and the second tool 42 is plugged into the second conductive hole 33.

[0057] The mounting member 60 is movably mounted on the support platform 20. Movement of the mounting member 60 drives the first and second cutting tools 41, 42 to move together. The first guide hole 31 serves as a clearance for the first cutting tool 41, while the second guide hole 33 serves as a clearance for the second cutting tool 42. It will be appreciated that the first and second guide holes 31, 33 also serve as guides for the first and second cutting tools 41, 42, respectively, preventing them from deviating from the first and second die holes 22, 23, thereby ensuring the coaxiality of the annular spacer.

[0058] When the first tool 41 and the second tool 42 extend into the first die hole 22 and the second die hole 23, the mounting member 60 and the pressing block 30 may abut against each other or be separated by a limiting structure. Figure 9 As shown, Figure 9 It is the third cross-sectional view of the embodiment of the stamping die of the present invention. The stamping die also includes a limiter 70, which is provided with a limit portion 71. The pressure block 30 is provided with a through hole 34. One end of the limiter 70 is connected to the mounting member 60, and the other end is inserted into the through hole 34. The limit portion 71 abuts against the pressure block 30, thereby limiting the penetration depth of the first tool 41 and the second tool 42 into the first conductive hole 31 and the second conductive hole 33. Because in the embodiment of the present application, the mounting member 60 and the pressure block 30 have the same cross-section, the mounting member 60 and the pressure block 30 are not easy to separate when they are in contact. The provision of the limiter 70 can avoid direct contact between the mounting member 60 and the pressure block 30, thereby facilitating the installation and debugging of the stamping die.

[0059] The present invention also provides a processing device comprising a stamping die. The specific structure of the stamping die is similar to that of the above-mentioned embodiments. Since the present processing device utilizes all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above-mentioned embodiments, and a detailed description thereof will not be repeated here. The processing device is used to stack and press the positive and negative electrode sheets together through the separator sheet 12 to form a battery cap.

[0060] In the stamping die of the present invention, the difference between the maximum distance and the minimum distance between the contour lines of the first die hole 22 and the second die hole 23 on the support surface 21 and the side of the pressure block 30 close to the support platform 20 is controlled so that the material strip 10 fits the contour lines of the first die hole 22 and the second die hole 23 on the support surface 21, thereby ensuring that the material strip 10 is tightened and fixed on the stamping die, avoiding the height difference between the contour lines of the first die hole 22 and the second die hole 23 on the support surface 21 being too large, which causes the material strip 10 to be released from the tightened state when the tool is at a low point of the contour line, thereby reducing the generation of burrs on the diaphragm sheet 12. On the other hand, the present application provides an air hole 421 and an air channel 422 on the second tool 42, and adjusts the vacuum degree of the air channel 422 through a vacuum mechanism, so that after the second tool 42 cuts the diaphragm sheet 12 from the material strip 10, the vacuum mechanism increases the vacuum degree of the air channel 422, so that the air hole 421 can adsorb the diaphragm sheet 12, thereby adsorbing and positioning the diaphragm sheet 12 on the second tool 42, and the adsorbed and positioned diaphragm sheet 12 can be directly transferred to the production line of the battery cap and put into the pressing process of the battery cap (for example, directly stacked on the prepared electrode sheet); in this way, in the process of pressing the battery cap, the diaphragm sheet 12 can be cut and used immediately, without the need for pre-processing or re-loading and positioning, thereby realizing the production and positioning of the diaphragm sheet on the production line, thereby improving the production efficiency of the battery cap.

[0061] The above descriptions are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present description and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present invention.

Claims

1. A stamping die for stamping a material strip into an annular diaphragm, wherein a hollow area is formed inside the diaphragm; characterized in that: The stamping die comprises: A support platform, the support platform having a support surface, the support surface being provided with a first die hole and a second die hole; a pressing block movably mounted on the support platform and located on one side of the support surface so as to be close to or away from the support surface; the pressing block is used to press the material strip onto the support surface so that the material strip covers the first die hole and the second die hole; A die cutter, the die cutter comprising a first cutter and a second cutter, the cutting area of ​​the second cutter being larger than the cutting area of ​​the first cutter; the first cutter being movably mounted on the support platform and disposed opposite to the first die hole so as to extend into or exit the first die hole; the second cutter being movably mounted on the support platform and disposed opposite to the second die hole so as to extend into or exit the second die hole; The first cutting tool is used to cut out a hollow area from the material strip when extending into the first die hole; The second cutting tool is used to extend into the second punch hole when the hollow area falls into the projection of the second punch hole, so as to cut the diaphragm sheet from the periphery of the hollow area of ​​the material strip; Wherein, in the movement direction of the pressing block, the maximum distance between the contour line of the first punch hole on the support surface and the side of the pressing block close to the support platform is a, and the minimum distance is b, and ab≤0.2; In the movement direction of the pressing block, the maximum distance between the contour line of the second punch hole on the support surface and the side of the pressing block close to the support platform is c, and the minimum distance is d, and the maximum distance cd≤0.2; The stamping die further includes a first driving device installed on the support platform, and the first driving device is used to drive the pressing block to move so that the pressing block can press or release the material strip.

2. The stamping die according to claim 1, wherein: The second tool is provided with a communicating air hole and an air passage, and the air hole is provided at the blade end of the second tool; A vacuum mechanism is installed on the support platform, the air passage is connected to a vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum degree of the air passage.

3. The stamping die according to claim 1, wherein: A material collecting trough is formed in the support platform, and the material collecting trough is located below the first punching die hole and communicated with the first punching die hole; The stamping die also includes a material collecting piece detachably mounted below the support platform. A feeding hole is provided at the bottom of the material collecting trough. The material collecting piece is connected to the feeding hole and is used to receive the scraps from the material collecting trough.

4. The stamping die according to claim 3, wherein: An air blowing channel is formed in the support platform, and the air blowing channel is connected to the material collecting trough. The stamping die also includes a gas driving device, and the gas driving device is connected to the air blowing channel to blow the scraps in the material collecting trough toward the feeding hole.

5. The stamping die according to claim 3, wherein: The bottom of the aggregate trough is formed with a slope surface, and the feed hole is arranged at the bottom of the slope surface.

6. The stamping die according to claim 2, wherein: The second tool includes a cutting part and a guide part, the cutting part is arranged in a ring on the guide part, the air hole is arranged on the cutting part, the guide part protrudes from the cutting part, and the cross-sectional shape of the guide part is consistent with the cross-sectional shape of the first tool; the guide part is used to extend into the hollow area of ​​the material strip before the cutting part cuts the diaphragm sheet from the periphery of the hollow area of ​​the material strip.

7. The stamping die according to claim 6, wherein: The support surface is provided with a feeding trough, the feeding trough is used for the movement of the feeding belt, and the first punching die hole and the second punching die hole are opened at the bottom of the feeding trough; The pressing block includes a pressing portion, and the pressing portion is used to press the material strip to the bottom of the material trough.

8. The stamping die according to claim 6, wherein: The stamping die also includes a mounting part, which is arranged on the side of the pressure block away from the support platform. The die tool is installed on the mounting part. The pressure block is provided with a first conductive hole and a second conductive hole. The first conductive hole is arranged opposite to the first die hole, and the second conductive hole is arranged opposite to the second die hole. The first tool is plugged into the first conductive hole, and the second tool is plugged into the second conductive hole.

9. The stamping die according to claim 8, wherein: The stamping die also includes a limiting piece, which is provided with a limiting portion. The pressure block is provided with a through hole. One end of the limiting piece is connected to the mounting piece, and the other end is inserted into the through hole. The limiting portion is supported by the pressure block; the limiting piece is used to limit the penetration depth of the first tool and the second tool in the first conductive hole and the second conductive hole.

10. A processing equipment, characterized in that, Comprising the stamping die according to any one of claims 1 to 9.

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