Punching device and processing equipment

Abstract

The present application relates to the technical field of stamping equipment, in particular to a stamping device and processing equipment; the parallelism between the side of the pressing block facing the supporting surface and the supporting surface is limited in relation to the thickness of the material belt, so that the material belt is kept taut during stamping, reducing the dislocation and sliding of the material belt on the supporting surface and thus reducing the generation of burrs.

Description

Technical Field

[0001] The present invention relates to the technical field of stamping equipment, and in particular to a stamping device 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 punching device, 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 present invention proposes a stamping device for punching a material strip into an annular diaphragm sheet, the stamping device comprising a stamping die and a material coiling mechanism; the stamping die comprises a support platform, a pressure block, a die tool and a vacuum mechanism; the support platform has a support surface, 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 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, 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 to extend into or out of the first die hole; the second tool can 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; the winding mechanism includes a unwinding component and a winding component, the unwinding component is used to unwind the material strip before cutting, and the winding component is used to wind up the remaining material strip after cutting; the support platform is located on the material path of the material strip so that the material strip passes through the support surface; wherein, the thickness of the material strip is a, and the parallelism b between the side of the pressing block close to the support platform and the support surface satisfies 0.125a-0.0375≤b≤-0.01a+0.023.

[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; the vacuum mechanism is installed on the support platform, 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, the stamping device also includes a first feed roller, which is rotatably mounted on the support platform. The first feed roller is arranged on the side of the first die hole away from the second die hole, and the first feed roller is used for winding the material strip between the unwinding assembly and the first die hole.

[0007] Optionally, the stamping device further includes a mounting shaft, and the first feed roller is rotatably engaged with the mounting shaft; the stamping device further includes an elastic member, and the elastic member supports the mounting shaft against the support surface, so that the first feed roller supports the material strip against the support surface.

[0008] Optionally, the stamping device also includes a clamping assembly, which is arranged between the unwinding assembly and the first feeding roller; the clamping assembly includes a mounting platform and a clamping member, and a feeding gap is formed between the clamping member and the mounting platform, and the feeding gap is used for the material strip to pass through; the clamping member can be movably mounted on the mounting platform to clamp the material strip to move when the winding mechanism is actuated.

[0009] Optionally, the stamping device also includes a second feed roller, which is rotatably mounted on the support platform, and the second feed roller is arranged on the side of the second die hole away from the first die hole, and the second feed roller is used for winding the material strip between the second die hole and the winding assembly.

[0010] Optionally, the unwinding assembly and the winding assembly are located on the same side of the stamping die, and the winding assembly is located above the unwinding assembly; the stamping device also includes a third feed roller rotatably mounted on the support platform, the third feed roller is located above the second feed roller, and the third feed roller is used for winding the remaining material of the tape running between the second feed roller and the winding assembly.

[0011] Optionally, the support surface is provided with a material trough for conveying the material strip, and the first punch hole and the second punch hole are provided at the bottom of the material trough; the pressing block includes a crimping portion, and the crimping portion is used to press the material strip to the bottom of the material trough.

[0012] Optionally, the winding mechanism further includes a tensioning roller, which is installed between the unwinding assembly and the stamping die, and the tensioning roller is used to tension the material strip between the unwinding assembly and the stamping die.

[0013] The present invention also provides a processing equipment, which includes the punching device as described above.

[0014] In the stamping device of the present invention, by limiting the relationship between the parallelism between the side of the pressing block facing the support surface and the support surface and the thickness of the material strip, the material strip is ensured to remain taut during the stamping process, thereby reducing the misalignment and sliding of the material strip on the support surface, thereby reducing the generation of burrs. Furthermore, by providing an air hole and an air channel on the second tool and adjusting the vacuum level of the air channel using a vacuum mechanism, after the second tool cuts the diaphragm sheet from the material strip, the vacuum mechanism increases the vacuum level of the air channel, allowing the air hole to absorb the diaphragm sheet, thereby adsorbing and positioning the diaphragm sheet on the second tool. The adsorbed and positioned diaphragm sheet can be directly transferred to the battery cap production line for the battery cap pressing process (for example, directly laminated on a prepared electrode sheet). In this way, during the battery cap pressing process, the diaphragm sheet 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. In addition, during the cutting process of the material strip, the material strip to be cut is unwound by the unwinding component, and the remaining material strip after cutting is wound up by the winding component, so that the unwinding process of the material strip, the cutting process of the material strip and the cutting process of the remaining material strip can be carried out simultaneously, so as to simplify the process of loading the material strip and sorting the remaining material, thereby further improving the production efficiency of the battery cap. 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 This is a first structural schematic diagram of an embodiment of a punching device of the present invention;

[0017] Figure 2 A second structural schematic diagram of an embodiment of a punching device of the present invention;

[0018] Figure 3 Schematic diagram of the process of cutting the material strip into the diaphragm sheet in the present invention;

[0019] Figure 4 Schematic diagram of the structure of a stamping die embodiment of the present invention;

[0020] Figure 5 for Figure 4 Schematic diagram of the top projection of the punching die;

[0021] Figure 6 for Figure 5 Schematic cross-section of the punch die along the AA direction;

[0022] Figure 7 for Figure 6 A partial enlarged view of point A in the middle;

[0023] Figure 8 Schematic diagram of the structure of the second tool in the present invention;

[0024] Figure 9 for Figure 8 Schematic diagram of the orthographic projection of the second tool;

[0025] Figure 10 for Figure 9 Schematic cross-sectional view of the second tool along the BB direction;

[0026] Figure 11 It is a structural schematic diagram of the clamping assembly in the present invention.

[0027] Description of Figure Numbers:

[0028]

[0029] 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

[0030] 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.

[0031] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), such 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 indication will also change accordingly.

[0032] 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.

[0033] The present invention provides a punching device for punching a material strip 10 into an annular diaphragm sheet 12 , wherein a hollow area 11 is formed inside the diaphragm sheet 12 .

[0034] In the embodiment of the present invention, Figure 1 、 Figure 2 、 Figures 4 to 7 As shown, Figure 1 This is a first structural schematic diagram of an embodiment of a punching device of the present invention; Figure 2 A second structural schematic diagram of an embodiment of a punching device of the present invention; Figure 4 Schematic diagram of the structure of a stamping die 100 according to an embodiment of the present invention; Figure 5 for Figure 4 A schematic top projection diagram of the middle stamping die 100; Figure 6 for Figure 5 A schematic cross-sectional view of the middle stamping die 100 along the AA direction; Figure 7 for Figure 6 A partial enlarged view of point A in the middle.

[0035] The stamping device includes a stamping die 100 and a coiling mechanism 50. The stamping die 100 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 move closer to or further 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 the cutting area 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 the hollow area 11 from the material strip 10 when it extends into the first die hole 22. 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 outer periphery of the hollow area 11 of the material strip 10. The winding mechanism 50 includes an unwinding assembly 51 and a rewinding assembly 52. ​​The unwinding assembly 51 is used to unwind the material strip 10 before being cut, and the rewinding assembly 52 is used to rewind the remaining material strip 10 after being cut. The support platform 20 is located on the material path of the material strip 10 so that the material strip 10 passes over the support surface 21.

[0036] The thickness of the material strip is a, and the parallelism b between the side of the pressing block close to the support platform and the support surface satisfies 0.125a-0.0375≤b≤-0.01a+0.023.

[0037] When the stamping die is stamping, the pressing block 30 presses down to hold the material strip 10 against the support surface 21. When the parallelism between the side of the pressing block 30 facing the support surface 21 and the support surface 21 differs greatly, the pressing block 30 cannot fully tension the material strip 10, causing the material strip 10 to slide dislocated on the support surface 21 when the tool is punching the material strip 10, thereby causing burrs or shape deformation of the diaphragm 12, affecting dimensional accuracy. The present application defines the relationship between the material strip 10 and the parallelism between the side of the pressing block 30 facing the support surface 21 and the support surface 21, so that the material strip 10 is tensioned and installed on the support surface 21, greatly reducing the generation of burrs during the cutting process, thereby ensuring the quality of the diaphragm 12 and facilitating the production of downstream products. Specifically, in the present application, the thickness range of the material strip 10 is selected from 0.05mm to 0.3mm. Preferably, the parallelism between the side of the pressing block 30 facing the support surface 21 and the support surface 21 is not greater than 0.02mm, thereby further ensuring the quality of the diaphragm 12.

[0038] Furthermore, when processing the stamping die parts, the flatness between the two can be ensured by improving the part accuracy of the pressure block 30 and the support table 20, such as improving the processing accuracy of the processing equipment. 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 pressure block 30 and the support table 20, so that the flatness between the pressure block 30 and the support table 20 can be within the set range.

[0039] In this embodiment, the annular diaphragm 12 is taken as a concentric circular ring for illustration. 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 position of the first tool 41 and the second tool 42.

[0040] The second cutter 42 is provided with a communicating air hole 421 and an air channel 422. The air hole 421 is provided at the blade end of the second cutter 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 cutter 42 cuts the diaphragm sheet 12 from the material strip, the vacuum mechanism can be used to suction-fix the diaphragm sheet 12 to the second cutter 42, thereby achieving the positioning production of the diaphragm sheet 12. The diaphragm sheet 12 on the second cutter 42 can then be directly transported to subsequent processing equipment for processing without the need for positioning and loading.

[0041] 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 100 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.

[0042] 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 can be arranged in a columnar shape, with the blade of the first cutter 41 being arranged at the periphery of the end face of the first cutter 41, and the blade of the second cutter 42 being arranged at 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 100 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.

[0043] like Figures 8 to 10 As shown, Figure 8 Schematic diagram of the structure of the second tool 42 in the present invention; Figure 9 for Figure 8 Schematic diagram of the orthographic projection of the second tool 42; Figure 10 for Figure 9 Schematic cross-sectional view of the second tool 42 along the BB direction.

[0044] The air passage 422 extends axially along 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. By adjusting the vacuum degree of the air passage 422, the vacuum mechanism can generate negative pressure at the air holes 421, 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. The air outlet of the vacuum mechanism is simultaneously connected to the multiple air passages 422. In this way, the adsorption position of the diaphragm 12 can be increased, the force on the diaphragm 12 is balanced, and the adsorption stability of the diaphragm 12 can be improved.

[0045] Please also refer to Figure 3 , Figure 3 This is a schematic diagram of the process of cutting the diaphragm sheet 12 from the material strip 10 in the present invention. During operation of the stamping die 100, the material strip 10 first passes through the first die hole 22. As the material strip 10 covers the first die hole 22, the pressing block 30 descends to press the material strip 10, ensuring that the material strip 10 does not shift or deform under the force of the stamping tool. After the pressing block 30 presses the material strip 10, the first tool 41 extends into the first die hole 22 and pierces the material strip 10, thereby cutting the scrap material from the material strip 10. In this manner, the first tool 41 first cuts out the hollowed-out area 11 from the material strip 10.

[0046] 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.

[0047] 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.

[0048] 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 100. 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.

[0049] The material strip 10 is usually received in a roll, so it needs to be unwound before cutting the material strip 10. During the cutting process, the material strip 10 also needs to be fed as the cutting progresses. The remaining material after cutting the material strip 10 also needs to be reeled for subsequent processing.

[0050] The winding mechanism 50 may include a fixed plate 54, with an unwinding assembly 51 and a rewinding assembly 52 mounted on the fixed plate 54. The unwinding assembly 51 is used to unwind the rolled material strip 10. The unwinding assembly 51 may include an unwinding roller. After the rolled material strip 10 is mounted on the unwinding roller, the rolled material strip 10 is gradually released as the unwinding roller rotates. The rewinding assembly 52 is used to rewind the remaining material strip 10 after cutting. The rewinding assembly 52 may include a rewinding roller and a reel mounted on the reel. The reel rotates with the reel to gradually rewind the remaining material strip 10.

[0051] The unwinding assembly 51 and the rewinding assembly 52 can be installed on opposite sides of the stamping die 100, or on the same side of the stamping die 100. There is no limitation here. It is only necessary to ensure that after the material strip 10 is unwound from the unwinding assembly 51, it is first fed to the stamping die 100 and then fed to the rewinding assembly 52. ​​The unwinding assembly 51 and the rewinding assembly 52 rotate synchronously, thereby driving the material strip 10 to automatically feed the material at the stamping die 100, so as to achieve position switching at the first die hole 22 and the second die hole 23, thereby cooperating with the stamping die 100 to achieve automatic feeding and cutting. In other words, the material strip 10 is unwound, punched and cut, and rewound at the same time, so as to achieve "immediate release, cutting, and rewinding" of the material strip 10, so as to simplify the process of loading the material strip 10 and sorting the remaining material, thereby further improving the production efficiency of the battery cap.

[0052] In the process of the material strip 10 moving from the unwinding assembly 51 to the rewinding assembly 52, it is not necessary to wind around other rollers, and other rollers can also be used to assist in feeding. Figure 4 、 Figure 6 and Figure 7 As shown, the stamping device also includes a first transfer roller 60, which can be rotatably mounted on the support platform 20. The first transfer roller 60 is arranged on the side of the first die hole 22 away from the second die hole 23. The first transfer roller 60 is used for winding the material strip 10 between the unwinding assembly 51 and the first die hole 22.

[0053] The first feed roller 60 can be mounted on the support surface 21, forming a first feed gap between the first feed roller 60 and the support surface 21. After being unwound from the unwinding assembly 51, the material strip 10 first passes through the first feed gap before being fed to the first die hole 22. The first feed roller 60 can position the material strip 10 relatively close to the support surface 21, allowing the material strip 10 to accurately cover the first die hole 22 and the second die hole 23, thereby improving the punching and cutting effect. In addition, the first feed roller 60 not only limits the material strip 10 but also assists in feeding by rotating, preventing the material strip 10 from getting stuck and further ensuring the stability of the punching and cutting process.

[0054] Specifically, such as Figure 4As shown, the stamping device also includes a mounting shaft 61, and the first feed roller 60 is rotatably matched with the mounting shaft 61. The stamping device also includes an elastic member, which supports the mounting shaft 61 to be installed on the support surface 21 so that the first feed roller 60 supports the material strip 10 on the support surface 21.

[0055] The stamping device also includes a mounting member 62, which is fixed to the support surface 21. The mounting member 62 is provided with a slide groove, and the end of the mounting shaft 61 can be raised and lowered in the slide groove. The elastic member can be a spring, with one end of the elastic member connected to the mounting member 62 and the other end connected to the end of the mounting shaft 61. When the material strip 10 passes through the first feed roller 60, it will generate a force on the first feed roller 60 to move away from the support surface 21. This force is transmitted to the elastic member by the mounting shaft 61, causing the elastic member to deform. Therefore, the elastic member will also apply a reverse elastic restoring force to the mounting shaft 61. This elastic restoring force reacts to the material strip 10 through the first feed roller 60, thereby holding the material strip 10 in a direction close to the support surface 21. In this way, the material feeding stability of the material strip 10 can be further guaranteed. In addition, the first feeding roller 60 that can elastically support the material strip 10 can also play a tensioning and feeding role on the material strip 10 to prevent the material strip 10 from slipping, thereby ensuring that the material strip 10 can effectively move to the first die hole 22 when passing through the first feeding roller 60.

[0056] For example, Figure 1 、 Figure 2 and Figure 11 As shown, Figure 11 Schematic diagram of the structure of the clamping assembly 70 of the present invention. The stamping device also includes the clamping assembly 70, which is disposed between the unwinding assembly 51 and the first feed roller 60. The clamping assembly 70 includes a mounting platform 71 and a clamping member 72, which is movably mounted on the mounting platform 71 and is used to clamp the material strip 10 to the mounting platform 71.

[0057] The clamping assembly 70 is located on the material path of the material strip 10 from the unwinding assembly 51 toward the stamping die 100. The clamping assembly 70 is used to clamp the material strip 10 during the material feeding process, thereby preventing the material strip from slipping during the feeding process and ensuring the accuracy between the hollow area 11 of the diaphragm sheet 12 and the outer contour.

[0058] Specifically, a feeding gap 73 is formed between the clamping member 72 and the mounting platform 71. The feeding gap 73 is used to allow the material strip 10 to pass through. The clamping member 72 can move away from or close to the mounting platform 71 to clamp the material strip 10 when close to the mounting platform 71. The clamping member 72 can be installed above the mounting platform 71, and the clamping member 72 can be raised and lowered relative to the mounting platform 71, so that the clamping member 72 can clamp the material strip 10 when it descends and release the material strip 10 when it rises. The clamping assembly 70 also includes a pneumatic guide rail, and the mounting platform 71 is installed on a slider of the pneumatic guide rail so that the mounting platform 71 and the clamping member 72 can drive the material strip 10 to slide. When the winding mechanism 50 needs to move the material, the clamping member 72 approaches the mounting platform 71 and holds the material strip 10 against the mounting platform 71. The mounting platform 71 slides with the material strip 10, and the winding mechanism 50 is collecting and winding the material. After completing one feeding stroke, the clamping member 72 moves away from the mounting platform 71 to release the material belt 10, and the mounting platform 71 drives the clamping member 72 to slide back to wait for the next feeding.

[0059] For example, Figure 4 、 Figure 6 and Figure 7 As shown, the stamping device also includes a second feed roller 80, which is rotatably mounted on the support platform 20. The second feed roller 80 is arranged on the side of the second die hole 23 away from the first die hole 22. The second feed roller 80 is used for winding the material strip 10 between the second die hole 23 and the winding assembly 52.

[0060] The second feed roller 80 can be mounted on the support surface 21, forming a second feed gap between the second feed roller 80 and the support surface 21. The remaining material of the strip 10 first passes through the second feed gap before being transported to the winding assembly 52. ​​The second feed roller 80 can position the strip 10 relatively close to the support surface 21, ensuring that the strip 10 accurately covers the first die hole 22 and the second die hole 23, thereby improving the punching and cutting effect. Furthermore, the second feed roller 80 can also assist in feeding by rotating, preventing the strip 10 from getting stuck and further ensuring the stability of the punching and cutting process.

[0061] For example, Figure 1 and Figure 2 As shown, the unwinding assembly 51 and the rewinding assembly 52 are located on the same side of the stamping die 100, and the rewinding assembly 52 is located above the unwinding assembly 51. The stamping device also includes a third feed roller 90 rotatably mounted on the support platform 20. The third feed roller 90 is located above the second feed roller 80 and is used to wind the excess material of the tape 10 running between the second feed roller 80 and the rewinding assembly 52.

[0062] After the material strip 10 is unwound from the unwinding assembly 51, it is first punched and cut by the stamping die 100. The remaining material strip 10 formed after punching and cutting is then wound back to the rewinding assembly 52 located above the unwinding assembly 51 through the third feed roller 90, so that the unwinding assembly 51 and the rewinding assembly 52 can be centrally arranged on the same side of the stamping die 100, so that the overall structural layout of the stamping device is more reasonable.

[0063] The first feed roller 60, the second feed roller 80 and the third feed roller 90 can all convert the sliding friction of the material belt 10 during movement into rolling friction, reducing the wear of the material belt 10. The second feed roller 80 and the third feed roller 90 also play a role in changing the movement trajectory of the material belt 10, making the structural layout more reasonable.

[0064] For example, Figure 4 、 Figure 6 and Figure 7 As shown, the support surface 21 is provided with a feeding trough 26, which is used to feed the material strip 10. The first die hole 22 and the second die hole 23 are provided at the bottom of the feeding 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 feeding trough 26. The feeding 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 in the feeding trough 26, so that the material strip 10 can be easily limited to prevent the material strip 10 from deviating from the first die hole 22 and the second die hole 23. At this time, the two surfaces with parallelism requirements are the bottom of the feeding trough 26 and the top of the crimping portion 31, that is, the bottom of the feeding trough 26 and the crimping portion 31 close to the support surface 21.

[0065] For example, Figure 1 and Figure 2 As shown, the winding mechanism 50 also includes a plurality of tensioning rollers 53, which are installed between the winding mechanism 50 and the stamping die 100. The tensioning rollers 53 are used to tension the material strip 10 between the winding mechanism 50 and the stamping die 100. The tensioning rollers 53 can be rotatably mounted on the fixed plate 54. After the material strip 10 is unwound from the unwinding assembly 51, it is first wound around the tensioning rollers 53 and then fed to the stamping die 100, thereby tensioning the material strip and improving the accuracy of the stamping and cutting process. Furthermore, some of the tensioning rollers 53 are slidably mounted on the fixed plate 54 via slide rails. By sliding the tensioning rollers 53, the material strip 10 is tightened to prevent slipping, thereby ensuring the conveying accuracy of the material strip 10.

[0066] The present invention also provides a processing device including a stamping device. The specific structure of the stamping device is similar to that of the above-mentioned embodiments. Since the present processing device adopts 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 will not be described in detail 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.

[0067] In the stamping device of the present invention, by limiting the relationship between the parallelism between the side of the pressing block 30 facing the support surface 21 and the support surface 21 and the thickness of the material strip 10, it is ensured that the material strip 10 remains tensioned during the stamping process, thereby reducing the misalignment and sliding of the material strip 10 on the support surface 21, thereby reducing the generation of burrs. 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 can increase 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 battery cap pressing process (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. In addition, during the cutting process of the material strip 10, the material strip 10 to be cut is unwound by the unwinding component 51, and the remaining material strip 10 after cutting is wound up by the winding component 52. The unwinding process of the material strip 10, the cutting process of the material strip 10 and the cutting process of the remaining material strip 10 can be carried out simultaneously, so as to simplify the process of loading the material strip 10 and sorting the remaining material, thereby further improving the production efficiency of the battery cap.

[0068] 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 punching device for punching a material strip into an annular diaphragm sheet, characterized in that: The stamping device includes a stamping die and a coiling mechanism; The stamping die includes a support platform, a pressing block, a die tool and a vacuum mechanism; The support platform has a support surface, and the support surface is provided with a first die hole and a second die hole; The pressing block is movably mounted on the support platform and is 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; The die cutter includes a first cutter and a second cutter, wherein the cutting area of ​​the second cutter is larger than the cutting area of ​​the first cutter; the first cutter is movably mounted on the support platform and is disposed opposite to the first die hole so as to extend into or exit the first die hole; the second cutter is movably mounted on the support platform and is 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; The winding mechanism includes a unwinding assembly and a rewinding assembly, wherein the unwinding assembly is used to unwind the material strip before being cut, and the rewinding assembly is used to rewind the remaining material strip after being cut; the support platform is located on the material path of the material strip so that the material strip passes through the support surface; The thickness of the material strip is a, and the parallelism b between the side of the pressing block close to the support platform and the support surface satisfies 0.125a-0.0375≤b≤-0.01a+0.023; 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 punching device according to claim 1, characterized in that 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; The vacuum mechanism is installed on the support platform, the air passage is communicated with a vacuum port of the vacuum mechanism, and the vacuum mechanism is used to adjust the vacuum degree of the air passage.

3. The punching device according to claim 1, wherein: The stamping device also includes a first feed roller, which is rotatably mounted on the support platform. The first feed roller is arranged on the side of the first die hole away from the second die hole. The first feed roller is used for winding the material strip between the unwinding assembly and the first die hole.

4. The punching device according to claim 3, characterized in that The punching device further includes a mounting shaft, and the first feeding roller is rotatably matched with the mounting shaft; The punching device further includes an elastic member, which supports and installs the mounting shaft against the support surface, so that the first feeding roller supports the material strip against the support surface.

5. The punching device according to claim 3, characterized in that The punching device further includes a clamping assembly, which is arranged between the unwinding assembly and the first feed roller; The clamping assembly includes a mounting platform and a clamping member, a feeding gap is formed between the clamping member and the mounting platform, and the feeding gap is used for the material strip to pass through; the clamping member can be movably mounted on the mounting platform to clamp the material strip when the winding mechanism is activated.

6. The punching device according to claim 1, wherein: The stamping device also includes a second feed roller, which is rotatably mounted on the support platform. The second feed roller is arranged on the side of the second die hole away from the first die hole. The second feed roller is used for winding the material strip between the second die hole and the winding assembly.

7. The punching device according to claim 6, characterized in that The unwinding assembly and the winding assembly are located on the same side of the stamping die, and the winding assembly is located above the unwinding assembly; the stamping device also includes a third feed roller rotatably mounted on the support platform, the third feed roller is located above the second feed roller, and the third feed roller is used for winding the remaining material of the tape running between the second feed roller and the winding assembly.

8. The punching device according to any one of claims 1 to 7, characterized in that: The support surface is provided with a material trough for conveying the material strip, and the first punch hole and the second punch hole are provided at the bottom of the material trough; the pressing block includes a crimping portion, and the crimping portion is used to press the material strip to the bottom of the material trough.

9. The punching device according to claim 8, characterized in that The winding mechanism further includes a tensioning roller, which is installed between the unwinding assembly and the stamping die, and is used to tension the material strip between the unwinding assembly and the stamping die.

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

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