Diaphragm punching device

Abstract

The utility model relates to the technical field of battery manufacturing, in particular to a diaphragm punching device. The diaphragm punching device comprises a fixing mechanism and a needle roller mechanism. The fixing mechanism at least comprises a bearing platform used for limiting a to-be-punched diaphragm. The needle roller mechanism at least comprises a round roller with an axis and a needle cluster arranged on the peripheral face of the round roller in a surrounding mode, the round roller can rotate around the axis of the round roller, and the needle cluster is used for punching a film to be punched. At least one of the fixing mechanism and the needle roller mechanism can move in the first direction, and an angle is formed between the first direction and the axis direction. According to the diaphragm punching device provided by the invention, a plurality of micropores which are uniformly distributed and uniform in aperture can be rolled on the diaphragm, so that the leakage rate of positive and negative electrode materials through the diaphragm is reduced, and the battery performance is improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of battery manufacturing, in particular to a diaphragm punching device. BACKGROUND

[0002] A solid-state battery is composed of a positive electrode material, a negative electrode material, a diaphragm and a solid-state electrolyte, the diaphragm is located between the positive and negative electrodes, is a film with a pore structure, and forms a solid-state electrolyte layer with the solid-state electrolyte, which not only ensures the passage of lithium ions but also hinders the transmission of electrons. Therefore, the performance of the diaphragm determines the interface structure and internal resistance of the battery, and directly affects the capacity, cycle and safety performance of the battery.

[0003] In the related art, micro-holes are manually rolled on the film, but such operation can easily result in poor uniformity of the distribution of the micro-holes and inconsistent sizes of the micro-holes, affecting the performance of the battery. CONTENT OF THE UTILITY MODEL

[0004] Therefore, it is necessary to provide a diaphragm punching device which can roll out multiple micro-holes with uniform distribution and uniform size on the diaphragm, reduce the leakage of the positive and negative electrode materials through the diaphragm, and improve the performance of the battery.

[0005] A diaphragm punching device comprises a fixing mechanism and a needle roller mechanism, the fixing mechanism at least comprises a bearing platform for limiting a diaphragm to be punched, the needle roller mechanism at least comprises a circular roller with an axis and a needle cluster surrounding the outer surface of the circular roller, the circular roller can rotate around the axis, and the needle cluster is used for punching the diaphragm to be punched, wherein at least one of the fixing mechanism and the needle roller mechanism can move in a first direction, and the first direction is arranged at an angle with the direction of the axis.

[0006] It can be understood that the diaphragm to be punched is limited on the bearing platform, and the circular roller can rotate around its own axis to act on the diaphragm to be punched to meet the opening of multiple micro-holes on the diaphragm to be punched. In this process, it is just because at least one of the fixing mechanism and the needle roller mechanism can move in the first direction, which can promote the relative movement of the bearing platform and the circular roller in the first direction, and because the first direction is at an angle with the rotation axis of the circular roller, the relative movement direction of the bearing platform and the circular roller is on the rotation path of the circular roller. In this way, in combination with the rotation of the circular roller and the relative movement in the first direction, multiple micro-holes with uniform distribution and uniform size can be opened on the diaphragm to be punched, and the uniformity of the punching is improved.

[0007] In some embodiments, the bearing platform is provided with a plurality of adsorption holes arranged at intervals.

[0008] In some embodiments, the bearing platform is provided with a limiting groove at the edge; the fixing mechanism further comprises a pressing strip movably connected to the bearing platform for limiting the film to be punched in the limiting groove.

[0009] In some embodiments, the fixing mechanism further comprises a buffer layer provided on the side of the bearing platform facing the needle roller mechanism, and the buffer layer is provided with apertures for gas flow.

[0010] In some embodiments, at least one of the fixing mechanism and the needle roller mechanism is movable along the direction of the axis.

[0011] In some embodiments, the septum punching device further comprises a first moving mechanism connected to the bearing platform for driving the bearing platform to move in the first direction.

[0012] In some embodiments, the septum punching device further comprises a second moving mechanism provided on the first moving mechanism and connected to the bearing platform; wherein the second moving mechanism is capable of driving the bearing platform to move in the first direction under the action of the first moving mechanism, and the second moving mechanism is used to drive the bearing platform to move in the direction of the axis.

[0013] In some embodiments, the septum punching device further comprises a fine adjustment mechanism connected to the needle roller mechanism for driving the needle roller mechanism to move in a second direction; the second direction, the first direction and the direction of the axis are arranged at an angle with each other.

[0014] In some embodiments, the second direction, the first direction and the direction of the axis are arranged perpendicularly with each other.

[0015] In some embodiments, the needle roller mechanism is provided with the fine adjustment mechanism at both ends in the direction of the axis; each fine adjustment mechanism comprises a driving module and a mounting base connected to the driving module, and the circular roller is rotatably connected to the corresponding mounting base at both ends in the direction of the axis.

[0016] In some embodiments, the septum punching device further comprises a support frame, and the fine adjustment mechanism is connected to the support frame; the support frame is provided with an avoiding hole penetrating in the direction of the axis, and part of the needle roller mechanism penetrates the avoiding hole and is capable of moving in the second direction in the avoiding hole.

[0017] In some embodiments, the circular roller is provided with a heat conduction cavity for filling a heat conduction medium, and the heat conduction cavity is used to heat the circular roller.

[0018] In some embodiments, the needle roller mechanism further comprises a heat insulation structure, which is arranged on the outer circumferential side of the circular roller; wherein the heat insulation structure is provided with an opening on the side facing the bearing platform, and the needle cluster protrudes from the opening.

[0019] In some embodiments, the circular roller comprises a needle roller barrel and a heat conduction barrel, the needle roller barrel is arranged on the outer circumferential side of the heat conduction barrel, the side of the needle roller barrel away from the heat conduction barrel is provided with the needle cluster, and the heat conduction barrel is surrounded by the heat conduction cavity.

[0020] In some embodiments, the inner barrel wall of the needle roller barrel at least partially matches the outer barrel wall of the heat conduction barrel.

[0021] In some embodiments, the heat conduction barrel comprises at least two separate barrels arranged from inside to outside, and the heat conduction cavity is arranged between any two adjacent separate barrels. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the description of the embodiments or the prior art will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of these drawings.

[0023] Figure 1 The first schematic diagram of the diaphragm punching device provided by an embodiment of the present application;

[0024] Figure 2 The second schematic diagram of the diaphragm punching device provided by an embodiment of the present application;

[0025] Figure 3 The cross-sectional view of the diaphragm punching device provided by an embodiment of the present application;

[0026] Figure 4 The partial schematic diagram of the needle roller mechanism in the diaphragm punching device provided by an embodiment of the present application.

[0027] 10, fixing mechanism; 11, bearing platform; 20, needle roller mechanism; 21, round roller; 22, needle cluster; 23, power source; 24, heat insulation structure; 25, electric slip ring; 30, first moving mechanism; 31, first linear module; 32, first support plate; 33, first detection assembly; 40, second moving mechanism; 41, second linear module; 42, second guide structure; 50, fine adjustment mechanism; 51, driving module; 52, mounting base; 53, third guide structure; 54, rotating bearing; 55, distance measuring structure; 60, support frame; 61, vertical plate; 62, bottom plate; 63, reinforcing plate; 71, first base; 72, second base; 211, needle roller cylinder; 212, heat conduction cylinder; 231, motor; 232, speed reducer; 233, connecting frame; 234, transmission shaft; 235, rotating shaft; 331, sensor; 332, first trigger piece; 411, second transmission lead screw; 412, second transmission nut; 511, third transmission lead screw; 512, third transmission nut; 601, avoiding hole; 1101, adsorption hole; 1102, limiting groove; 1103, sliding groove; 2101, heat conduction cavity; 2121, separation cylinder; 2401, heat insulation cavity; 2402, opening. DETAILED DESCRIPTION

[0028] In order to make the above objectives, features and advantages of the present application more apparent, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different manners other than those described herein, and it is understood that similar modifications can be made by those skilled in the art without departing from the spirit and scope of the present application, and therefore the present application is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there can be intervening components. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or there can be intervening components. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used in the description of the present application are used for illustrative purposes only and are not intended to be limiting.

[0030] In addition, the terms "first", "second", and the like are used only to describe the components and do not imply or suggest relative importance or a number of the indicated technical features. Thus, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0031] In the present application, unless specifically defined and limited otherwise, a first feature "on", "under", "above" or "over" a second feature can be that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature "on", "above" or "over" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the first feature is horizontally higher than the second feature. The first feature "under", "below" or "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the first feature is horizontally lower than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in the specification of the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terms used in the specification of the present application are only for the purpose of describing specific embodiments and are not intended to limit the present application. The term "and / or" used in the specification of the present application includes any and all combinations of one or more related listed items.

[0033] Please refer to Figures 1 to 3 An embodiment of the present application provides a diaphragm punching device, which comprises a fixing mechanism 10 and a needle roller mechanism 20. The fixing mechanism 10 at least comprises a bearing platform 11 for limiting a diaphragm to be punched. The needle roller mechanism 20 at least comprises a circular roller 21 with an axis and a needle cluster 22 surrounding the outer circumferential surface of the circular roller 21. The circular roller 21 can rotate around the axis, and the needle cluster 22 is used for punching the diaphragm to be punched. At least one of the fixing mechanism 10 and the needle roller mechanism 20 can move along a first direction, and the first direction is arranged at an angle with the direction of the axis. The first direction is the X-axis direction, and the direction of the axis is the Y-axis direction.

[0034] It can be understood that the diaphragm to be punched is limited on the bearing platform 11, and the circular roller 21 can rotate around its own axis to act on the diaphragm to be punched through the needle cluster 22 to meet the opening of multiple micro-holes on the diaphragm to be punched. In this process, it is just because at least one of the fixing mechanism 10 and the needle roller mechanism 20 can move along the first direction, which can cause the relative movement of the bearing platform 11 and the circular roller 21 in the X-axis direction. And, because the X-axis direction and the Y-axis direction are arranged at an angle, it is equivalent to that the relative movement direction of the bearing platform 11 and the circular roller 21 is on the rotation path of the circular roller 21. Therefore, the diaphragm punching device provided by the embodiment can cooperate with the relative movement along the X-axis direction in the process of the rotation of the circular roller 21 around the Y-axis, which is equivalent to that the diaphragm to be punched and the circular roller 21 have linear movement along the X-axis direction when the circular roller 21 is rolling and punching, so as to open multiple micro-holes with uniform distribution and uniform aperture on the diaphragm to be punched, and improve the uniformity of the punching.

[0035] For example, only the circular roller 21 moves linearly along the X-axis. That is, while rotating around the Y-axis to press and punch holes, the circular roller 21 can also move relative to the supporting platform 11 along the X-axis, so that the circular roller 21 rotates as it passes over the film to be punched to achieve punching. Alternatively, only the supporting platform 11 moves linearly along the X-axis. That is, while the circular roller 21 rotates around the Y-axis, the supporting platform 11 moves relative to the circular roller 21 along the X-axis, so that the film to be punched passes over the circular roller 21 to achieve punching. Or, both the circular roller 21 and the supporting platform 11 move linearly along the X-axis. Taking the X-axis as the horizontal left-right direction as an example, while the circular roller 21 rotates around the Y-axis, it can move from right to left along the X-axis, and the supporting platform 11 moves from left to right, thereby achieving punching.

[0036] The needle cluster 22 includes multiple piercing needles, which are spaced apart on the circular roller 21. Each piercing needle is conical. For example, the diameter of the needle bottom protruding outside the circular roller 21 is 0.8 mm, the diameter of the needle tip is 0.1 mm, the needle length is 4 mm, and the lateral and circumferential center spacing is 3 mm.

[0037] like Figure 1 As shown, optionally, the support platform 11 is provided with a plurality of spaced-apart adsorption holes 1101. That is to say, the support platform 11 provided in this embodiment can use vacuum adsorption to fix the membrane to be perforated. Specifically, the membrane perforation device also includes a vacuum pump and a connecting pipe. The support platform 11 is provided with an air channel or air chamber communicating with the connecting pipe. The plurality of adsorption holes 1101 are communicating with the air channel to achieve vacuum adsorption. Using vacuum adsorption, the membrane to be perforated can be quickly positioned and fixed. Vacuum adsorption is a non-contact fixation method, which reduces damage to the membrane to be perforated. Moreover, the use of multiple adsorption holes 1101 increases the reliability of fixing the membrane to be perforated, effectively avoiding slippage or deformation during the perforation process. In addition, vacuum adsorption is reusable and does not require replacement of consumables, thus reducing costs.

[0038] Furthermore, the fixing mechanism 10 also includes a buffer layer, which is disposed on the side of the support platform 11 facing the needle roller mechanism 20. The buffer layer has pores for gas flow. It is understood that when the circular roller 21 is used to press and punch holes, the needle cluster 22 needs to pass through the membrane to be punched, causing the end of the needle cluster 22 to contact the support platform 11, which can easily lead to deformation of the needle cluster 22. Therefore, in this embodiment, a buffer layer is added to the support platform 11 to provide soft support for the needle cluster 22, improving the problem of easy deformation of the end of the needle cluster 22; and, precisely because the buffer layer has pores, it does not interfere with the vacuum adsorption operation. In some specific embodiments, the buffer layer is made of a flexible material with pores, such as high-density sponge, which ensures stable vacuum adsorption while providing soft support, and can recover after deformation, facilitating multiple uses.

[0039] As Figure 1 shown, yet another alternative, the bearing platform 11 is provided with a limiting groove 1102 at the edge. The fixing mechanism 10 further comprises a pressing strip, which is movably connected to the bearing platform 11, for limiting the film to be punched in the limiting groove 1102. When fixing the film to be punched, the film to be punched is placed on the bearing platform 11, and the film to be punched is completely flattened without wrinkles by means of vacuum suction, and then the edge of the film to be punched can be inserted into the limiting groove 1102, and then the pressing strip is inserted into the limiting groove 1102, so that the pressing strip is pressed on the film to be punched, thereby realizing the fixation of the film to be punched, ensuring that the middle region or the region needing to be punched of the film to be punched is fully unfolded, and further ensuring the consistency of the punching density. Moreover, when fixing the film to be punched based on vacuum suction, the cooperation of the pressing strip and the limiting groove 1102 can play a reinforcing role. It can be understood that the holes in the film to be punched during the punching process can cause the suction to leak and affect the fixation, at which time the cooperation of the pressing strip and the limiting groove 1102 can fully ensure the reliable fixation of the film to be punched relative to the bearing platform 11, and even if there is a leak, it will not affect the fixation firmness. In this way, when there is a more serious leak, the vacuum suction can be turned off, and the cooperation of the pressing strip and the limiting groove 1102 can also fully ensure the reliable fixation of the film to be punched relative to the bearing platform 11.

[0040] Among them, the pressing strip is made of flexible deformable material, for example, a silica gel pressing strip, which can rely on small deformation and friction when inserted into the limiting groove 1102 to ensure fixation reliability and reduce wear on the film to be punched. Alternatively, the pressing strip is made of rubber material or silicone rubber material. Of course, the pressing strip and the bearing platform 11 can also be fastened by screws or buckled to improve fixation reliability.

[0041] Please refer to Figures 1 to 3 , as some embodiments in which the diaphragm punching device further comprises a first moving mechanism 30 connected to the bearing platform 11 for driving the bearing platform 11 to move along the X-axis direction. That is, in this embodiment, the bearing platform 11 moves linearly along the X-axis direction, and the circular roller 21 only rotates around the Y-axis, and the bearing platform 11 drives the film to be punched to move along the X-axis direction relative to the circular roller 21 to realize the punching.

[0042] For example, the first moving mechanism 30 comprises a first linear module 31 and a first support plate 32, the first support plate 32 is connected to the slider of the first linear module 31, and the bearing platform 11 is arranged on the first support plate 32, thereby realizing the driving of the bearing platform 11. The first linear module 31 can be a ball screw type linear module, a linear motor 231 type linear module, a synchronous belt type linear module, a rack and pinion type linear module, etc. In actual use, the moving speed of the bearing platform 11 driven by the first linear module 31 is substantially matched with the rotating speed of the circular roller 21, so as to ensure the consistency of the punching speed.

[0043] Alternatively, the first moving mechanism 30 can also be connected with the needle roller mechanism 20 to drive the needle roller mechanism 20 to move along the X-axis direction. Alternatively, the first moving mechanism 30 is provided with two, one of which is connected with the fixing mechanism 10, and the other of which is connected with the needle roller mechanism 20.

[0044] As shown in Figure 1 Further, the first moving mechanism 30 further comprises a first detection assembly 33 for detecting the position of the fixing mechanism 10 along the X-axis direction and limiting. The first detection assembly 33 comprises a sensor 331 and a first trigger piece 332, one of which is arranged on the bearing platform 11, and the other of which is arranged on the linear guide rail of the first linear module 31. The first trigger piece 332 is used to trigger the sensor 331 to feed back a detection signal, so as to judge the moving position of the fixing mechanism 10 and make a relevant response. For example, the sensor 331 is provided with two, which are arranged at two ends of the linear guide rail along the X-axis direction; and the first trigger piece 332 is also provided with two, which are arranged at two ends of the bearing platform 11 along the X-axis direction. The sensor 331 and the first trigger piece 332 located at the same end along the X-axis direction are matched with each other, and respectively serve as the moving limit of the bearing platform 11 along the X-axis direction. The sensor 331 can adopt a reflection type photoelectric sensor.

[0045] Optionally, at least one of the fixing mechanism 10 and the needle roller mechanism 20 can move along the Y-axis direction. That is, the moving along the Y-axis direction can be used to adjust the position of the circular roller 21 relative to the film to be punched along the Y-axis direction, so as to change the punching density along the Y-axis direction. For example, only the fixing mechanism 10 can move along the Y-axis direction, and then the bearing platform 11 drives the film to be punched to move along the Y-axis direction (i.e. linear motion, referred to as translation) relative to the circular roller 21. Alternatively, only the needle roller mechanism 20 can move along the Y-axis direction; or both the needle roller mechanism 20 and the fixing mechanism 10 can move along the Y-axis direction.

[0046] In some embodiments, the fixing mechanism 10 can move relative to the circular roller 21 along the X-axis direction, or move relative to the circular roller 21 along the Y-axis direction, and the circular roller 21 can only rotate around the Y-axis. Alternatively, the fixing mechanism 10 can only translate along the X-axis direction, and the circular roller 21 can translate along the X-axis direction, or translate along the Y-axis direction, or rotate around the Y-axis. Here, only examples are given.

[0047] Please refer to Figure 1 and Figure 2 For example, the diaphragm punching device further comprises a second moving mechanism 40, which can be directly connected with the bearing platform 11 in the fixing mechanism 10 to realize the translation of the fixing mechanism 10 along the Y-axis direction. Alternatively, the second moving mechanism 40 is connected with the circular roller 21 in the needle roller mechanism 20 to realize the translation of the circular roller 21 along the Y-axis direction. Alternatively, the bearing platform 11 and the circular roller 21 are respectively connected with the second moving mechanism 40.

[0048] In some embodiments, the fixing mechanism 10 can move relative to the circular roller 21 along the X-axis direction, or move relative to the circular roller 21 along the Y-axis direction. Specifically, the second moving mechanism 40 is arranged on the first moving mechanism 30 and connected with the bearing platform 11. The second moving mechanism 40 can drive the bearing platform 11 to move along the X-axis direction under the action of the first moving mechanism 30, and the second moving mechanism 40 is used to drive the bearing platform 11 to move along the Y-axis direction. The second moving mechanism 40 at least comprises a second linear module 41, and the bearing platform 11 is connected to the power output end of the second linear module 41.

[0049] For example, the second linear module 41 adopts screw transmission, comprising a second transmission screw 411 and a second transmission nut 412, the second transmission nut 412 is threadedly connected to the second transmission screw 411, and the second transmission screw 411 is arranged on the first support plate 32 through a seat. The second transmission screw 411 can be driven to rotate by a motor, or the second transmission screw 411 is connected with a hand wheel to drive the second transmission screw 411 to rotate by the hand wheel, so as to drive the second transmission nut 412 to move along the axial direction of the second transmission screw 411. The axial direction of the second transmission screw 411 is along the Y-axis direction, the second transmission nut 412 is connected with the bearing platform 11 to drive the bearing platform 11 to move along the Y-axis direction. The bottom of the bearing platform 11 is provided with a sliding groove 1103, and part of the second transmission nut 412 is clamped in the sliding groove 1103 and fastened by screws to improve the connection reliability.

[0050] The second moving mechanism 40 further comprises a second guiding structure 42 for guiding the movement of the bearing platform 11 along the Y-axis direction. The second guiding structure 42 comprises a linear guide rail and a sliding block connected to the linear guide rail. The linear guide rail is arranged on the first support plate 32, and the sliding block is connected to the bearing platform 11. Two second guiding structures 42 are arranged on the two sides along the X-axis direction. The second moving mechanism 40 further comprises a buffer limiting structure. The two ends of the first support plate 32 along the Y-axis direction are respectively provided with a buffer limiting structure. The two buffer limiting structures can respectively abut against and limit the two sides of the bearing platform 11 along the Y-axis direction, and can also buffer the impact force when abutting, thereby improving the safety in use.

[0051] The second moving mechanism 40 further comprises a first hand wheel connected to the second transmission screw 411. The first hand wheel is used to drive the second transmission screw 411 to rotate, thereby realizing the movement of the bearing platform 11 along the Y-axis direction. Such an arrangement is beneficial for manual fine adjustment by the staff, thereby adjusting the hole density on the film to be punched.

[0052] Please refer to Figures 1 to 3 In some other optional embodiments, the diaphragm punching device further comprises a fine adjustment mechanism 50 connected to the needle roller mechanism 20 and used to drive the needle roller mechanism 20 to move along a second direction. The second direction, the first direction (X-axis direction) and the Y-axis direction are arranged at an angle with each other. For example, the second direction is the Z-axis direction, and the X-axis direction, the Y-axis direction and the Z-axis direction are arranged perpendicular to each other.

[0053] That is, the needle roller mechanism 20 can also reciprocate along the Z-axis direction (i.e. the vertical direction) under the action of the fine adjustment mechanism 50, so as to adjust the position of the needle cluster 22 relative to the film to be punched. When preparing for hole punching, the needle roller mechanism 20 is located at a higher position under the action of the fine adjustment mechanism 50, so as to make the needle cluster 22 spaced apart from the film to be punched along the Z-axis direction. When hole punching is needed, the needle roller mechanism 20 moves downward along the Z-axis under the action of the fine adjustment mechanism 50, so as to make the needle cluster 22 punch into the film to be punched, thereby realizing hole punching. After the hole punching is completed or when the bearing platform 11 needs to move along the Y-axis direction, the fine adjustment mechanism 50 drives the needle roller mechanism 20 to move upward along the Z-axis direction.

[0054] Alternatively, the included angle between the first direction and the Y-axis direction can also be different from 90 degrees. For example, the bearing platform 11 is rectangular, the Y-axis direction is the width direction of the bearing platform 11, and the first direction is the length direction of the diagonal line corresponding to the opposite corners of the bearing platform 11. As long as it can satisfy the uniform hole density realized by the rotation of the circular roller 21 combined with the relative movement between the circular roller 21 and the bearing platform 11. Here, only an example is given.

[0055] In some specific embodiments, the needle roller mechanism 20 is provided with a fine adjustment mechanism 50 at both ends along the Y-axis direction, so as to maintain the force stability of the needle roller mechanism 20 through the cooperation of the two fine adjustment mechanisms 50, and improve the movement reliability. Each fine adjustment mechanism 50 includes a driving module 51 and a mounting base 52 connected to the driving module 51, and the two ends of the circular roller 21 along the Y-axis direction are rotatably connected to the corresponding mounting bases 52.

[0056] That is, the driving module 51 moves the mounting base 52 along the Z-axis direction, and the mounting base 52 drives the needle roller mechanism 20 to move synchronously along the Z-axis direction, so as to realize the height fine adjustment of the needle roller mechanism 20 along the Z-axis direction relative to the bearing platform 11. The driving module 51 can also adopt a screw transmission, including a third transmission screw 511 and a third transmission nut 512, the third transmission nut 512 is threadedly connected to the third transmission screw 511, and the axis of the third transmission screw 511 is along the Z-axis direction. The third transmission nut 512 is connected to the mounting base 52. The third transmission screw 511 rotates around its axis to drive the third transmission nut 512 to move along the Z-axis direction, and then drives the needle roller mechanism 20 to move along the Z-axis direction through the mounting base 52.

[0057] The driving module 51 further includes a second hand wheel connected with the third transmission screw 511 to drive the third transmission screw 511 to rotate, which is beneficial for manual fine adjustment by the staff.

[0058] Please continue to refer to Figures 1 to 3 Further, the diaphragm punching device further includes a support frame 60, the fine adjustment mechanism 50 is connected to the support frame 60, the support frame 60 is provided with an avoiding hole 601 penetrating along the Y-axis direction, and part of the needle roller mechanism 20 is arranged in the avoiding hole 601 and can move along the Z-axis direction in the avoiding hole 601. The support frame 60 can elevate the fine adjustment mechanism 50 and the needle roller mechanism 20 and be located above the fixing mechanism 10. The support frame 60 includes a vertical plate 61, a bottom plate 62, and a reinforcing plate 63, the vertical plate 61 is connected to the bottom plate 62 and arranged in the vertical direction, and the reinforcing plate 63 is connected between the vertical plate 61 and the bottom plate 62 to improve the structural strength of the support frame 60. The fine adjustment mechanism 50 is arranged on the vertical plate 61. In actual use, two support frames 60 are arranged in a relative and spaced manner along the Y-axis direction, and one fine adjustment mechanism 50 is arranged on each side of the two support frames 60. The vertical plate 61 is provided with an avoiding hole 601 penetrating along the Y-axis direction, and the length of the avoiding hole 601 extends along the Z-axis direction, which is beneficial for part of the needle roller mechanism 20 to be arranged in the avoiding hole 601 to reduce the movement interference.

[0059] The third guide structure 53 is also composed of a linear guide rail and a sliding block connected to the linear guide rail, the sliding block is connected to the mounting base 52, and the linear guide rail is arranged on the corresponding support frame 60. Two third guide structures 53 are arranged between each support frame 60 and the corresponding mounting base 52 along the X-axis direction.

[0060] Referring to Figures 1 to 4 In some embodiments, the needle roller mechanism 20 further comprises a power source 23 connected to the circular roller 21, for driving the circular roller 21 to rotate around its own axis. The two ends of the circular roller 21 along the Y-axis direction can be rotatably connected to the corresponding mounting base 52, for example, through a rotary bearing 54, not only to meet the rotation of the circular roller 21, but also to realize the rotary support of the circular roller 21. The power source 23 comprises a motor 231, a transmission shaft 234 and a rotary shaft 235, the transmission shaft 234 and the rotary shaft 235 are arranged at the two ends of the circular roller 21 along the Y-axis direction, the end of the transmission shaft 234 away from the circular roller 21 is connected to the motor 231, the transmission shaft 234 and the rotary shaft 235 are respectively arranged in the corresponding mounting base 52, and are rotatably connected through the corresponding rotary bearing 54, and the transmission shaft 234 and the rotary shaft 235 are arranged in the corresponding avoiding hole 601 of the support frame 60 and move along the Z-axis direction in the corresponding avoiding hole 601.

[0061] Further, the power source 23 further comprises a speed reducer 232 connected between the motor 231 and the transmission shaft 234, for reducing the output speed of the motor 231, ensuring the rotation stability, and reducing the risk of response time delay and vibration of the circular roller 21 during rotation. The motor 231 and the speed reducer 232 are connected to the corresponding mounting base 52 through the connecting frame 233 to ensure the connection reliability and stability. In actual use, the end of the rotary shaft 235 away from the circular roller 21 is sleeved with an electric slip ring 25, and the rotary shaft 235 rotates relative to the electric slip ring 25 with the transmission shaft 234. A position detection piece is installed on the electric slip ring 25, and the end of the rotary shaft 235 is provided with a second trigger piece to cooperate with the position detection piece to realize the detection of the rotation position of the circular roller 21; and the position detection piece can also be used as the position zero of the circular roller 21 each time it is rolled. The position detection piece detection information can be fed back to the control center of the diaphragm punching device in time, which is beneficial to timely control of the motor 231 response. The position detection piece adopts a reflection type photoelectric sensor.

[0062] Referring to Figures 1 to 3In actual use, the fine adjustment mechanism 50 further comprises a distance measuring structure 55 mounted on the support frame 60 for detecting the displacement of the mounting base 52 along the Z-axis direction, thereby facilitating the determination of the piercing depth of the needle cluster 22. The distance measuring structure 55 can be a dial gauge. Meanwhile, the fine adjustment mechanism 50 further comprises a third detection assembly comprising a transmitting end and a receiving end arranged opposite to each other along the Y-axis direction, and the light emitted by the transmitting end can be received by the receiving end. When the carrying platform 11 moves to the corresponding position, it can block the light emitted by the transmitting end, so that the receiving end cannot receive it. The third detection assembly is provided in two sets and arranged spaced apart along the X-axis direction on the support frame 60. By providing the third detection assembly, the movement of the carrying platform 11 along the X-axis direction to meet the rotation time of the circular roller 21 during repeated roller pressing and piercing can be determined, thereby ensuring the piercing quality and density.

[0063] Further, the second base 72 is connected between the two support frames 60. That is, the second base 72 is supported at the bottom of the two support frames 60 and connected with the respective bottom plates 62 to realize the integrated assembly of the two support frames 60. Meanwhile, the first base 71 is provided at the bottom of the first moving mechanism 30 to serve as a support. The first base 71 is provided in two sets and arranged spaced apart along the X-axis direction. The second base 72 is arranged between the two first bases 71, thereby ensuring that the needle roller mechanism 20 is located at or near the middle of the first moving mechanism 30. The bottom of the first base 71 and the second base 72 can be connected with supporting legs or casters, or both, which not only facilitates the carrying but also ensures the stability of the support. The supporting legs can be used to adjust the levelness of the first base 71 and the second base 72 to maintain stability.

[0064] Please refer to Figure 3 and Figure 4 As some further examples, the circular roller 21 is provided with a heat conduction cavity 2101 filled with a heat conduction medium for heating the circular roller 21. That is, the circular roller 21 is heated by the heat conduction medium in the heat conduction cavity 2101, thereby transferring heat to the film to be punched, promoting the film to be punched to have a certain heat extension, avoiding the film to be punched to shrink in the pierced hole to affect the piercing density, and preventing the edge of the pierced hole from carbonizing. The heat conduction cavity 2101 can be filled with heat conduction oil. The heat conduction cavity 2101 can also be provided with a heater to heat the heat conduction oil, thereby achieving the heating of the circular roller 21; and a temperature sensor is arranged in the heat conduction cavity 2101 to detect the temperature of the heat conduction oil, facilitating timely adjustment to avoid excessively low or high temperature. At this time, due to the provision of the aforementioned electric slip ring 25, the power supply line of the heater for heating the oil and the lead wire of the temperature sensor can be led out, reducing the problems of entanglement and disorder of the lead wire caused by the rotation of the circular roller 21.

[0065] Please refer to Figures 1 to 3Further, the needle roller mechanism 20 further comprises a heat insulation structure 24, which is arranged on the outer periphery of the round roller 21. The heat insulation structure 24 is provided with an opening 2402 on the side facing the bearing platform 11, and the needle cluster 22 protrudes from the opening 2402. That is, the arrangement of the heat insulation structure 24 is equivalent to arranging a heat insulation cavity 2401 on the outer side of the round roller 21, so as to reduce heat transfer and heat loss, and improve the heating efficiency of the round roller 21. The heat insulation structure 24 comprises four side plates and a top plate, which are spliced into a quadrangular prism structure. Among them, the two side plates arranged in the Y-axis direction are both provided with an opening corresponding to the bearing, and the transmission shaft 234 is rotatably supported by the bearing. At the same time, the two side plates of the heat insulation structure 24 in the Y-axis direction can be fixedly connected with the corresponding mounting base 52 on the same side, so as to ensure the assembly reliability and stability.

[0066] Among them, the heat insulation structure 24 can be made of mica plate to improve the heat insulation effect. At the same time, each mounting base 52 is provided with a protrusion corresponding to the rotating bearing 54 on the same side, and the opening of the two side plates of the heat insulation structure 24 is arranged on the outer side of the corresponding protrusion.

[0067] Please refer to Figure 3 and Figure 4 Optionally, the round roller 21 comprises a needle roller barrel 211 and a heat conduction barrel 212, the needle roller barrel 211 is arranged on the outer periphery of the heat conduction barrel 212, the needle cluster 22 is arranged on the side of the needle roller barrel 211 away from the heat conduction barrel 212, and the heat conduction barrel 212 surrounds a heat conduction cavity 2101. It can be understood that, by arranging the needle roller barrel 211 and the heat conduction barrel 212 separately, the heat conduction cavity 2101 filled with heat conduction medium and the needle cluster 22 used for punching holes are arranged separately. When the heat conduction cavity 2101 leaks, the arrangement of the punching hole part is not affected, and only the internal heat conduction barrel 212 needs to be replaced, thereby reducing the cost. The heat conduction barrel 212 has good heat conduction performance, so as to ensure that the heat can be quickly and uniformly transmitted to the needle roller barrel 211. The inner wall of the heat conduction barrel 212 can be provided with a spiral heat conduction groove, so as to increase the contact area between the oil and the heat conduction barrel 212 and improve the heat conduction efficiency.

[0068] Further, the inner cylinder wall of the needle roller barrel 211 and the outer cylinder wall of the heat conduction barrel 212 are at least partially attached. The heat conduction is realized by directly attaching the needle roller barrel 211 and the heat conduction barrel 212, thereby improving the heat conduction efficiency. The greater the attachment range of the needle roller barrel 211 and the heat conduction barrel 212, the greater the heat conduction area of the direct contact for heat conduction, and the higher the heat conduction efficiency. Alternatively, when the inner cylinder wall of the needle roller barrel 211 and the outer cylinder wall of the heat conduction barrel 212 are partially attached, other heat conduction medium can be arranged in the other part which is not attached. As long as it can ensure sufficient heat conduction, it is only used as an example here.

[0069] In some specific embodiments, the heat-conducting cylinder 212 comprises at least two separate cylinders 2121 sleeved from inside to outside, and a heat-conducting cavity 2101 is arranged between any two adjacent separate cylinders 2121. That is, the heat-conducting cavities 2101 are arranged in a ring shape. Such an arrangement can reduce the space required to fill the heat-conducting oil and reduce the loss of the heat-conducting oil while ensuring that the heat is fully transferred on the circumference of the needle roller cylinder 211; and when the amount of heat-conducting oil is reduced, the overall weight of the needle roller mechanism 20 is also reduced, which is more conducive to stable support on the mounting base 52 and reduces the load on the fine adjustment mechanism 50.

[0070] For example, two separate cylinders 2121 are provided, which are sleeved from inside to outside in the order of decreasing diameter, the outer cylinder wall of the outermost separate cylinder 2121 is attached to the inner cylinder wall of the needle roller cylinder 211, and the heat-conducting cavities 2101 are arranged between the two separate cylinders 2121. The two separate cylinders 2121 and the outer needle roller cylinder 211 are coaxially arranged; and the length of the needle roller cylinder 211 along the Y-axis direction is greater than the length of the two separate cylinders 2121 along the Y-axis direction, so as to ensure that the number of needle clusters 22 on the needle roller cylinder 211 is large enough to fully punch holes.

[0071] Please refer to Figures 1 to 4 In some specific embodiments, the heat-conducting cylinder 212 comprises at least two separate cylinders 2121 sleeved from inside to outside, and a heat-conducting cavity 2101 is arranged between any two adjacent separate cylinders 2121. That is, the heat-conducting cavities 2101 are arranged in a ring shape. Such an arrangement can reduce the space required to fill the heat-conducting oil and reduce the loss of the heat-conducting oil while ensuring that the heat is fully transferred on the circumference of the needle roller cylinder 211; and when the amount of heat-conducting oil is reduced, the overall weight of the needle roller mechanism 20 is also reduced, which is more conducive to stable support on the mounting base 52 and reduces the load on the fine adjustment mechanism 50.

[0072] In actual use, first, the adjustment test of the piercing depth is carried out. The first moving mechanism 30 is controlled to drive the fixing mechanism 10 to move to the left along the X-axis direction, the buffer layer and the cut film to be punched are placed on the bearing platform 11 of the fixing mechanism 10, and then the vacuum pump is turned on to fix the film to be punched by vacuum adsorption, and the edges of the film to be punched are pressed into the corresponding limiting grooves 1102 by the pressing strip. After the film to be punched is taut and fixed, the piercing operation is started. At this time, the first moving mechanism 30 is started to drive the bearing platform 11 with the film to be punched to move from left to right along the X-axis direction to the lower side of the needle roller mechanism 20, and the temperature of the circular roller 21 in the needle roller mechanism 20 is also heated to the specified temperature, and then the needle roller mechanism 20 is driven downward along the Z-axis direction by the two fine adjustment mechanisms 50, and after it is moved to the specified position, the two distance measuring structures 55 arranged at intervals along the Y-axis direction are both zeroed. Then the needle roller mechanism 20 is lifted by the fine adjustment mechanism 50, and the first moving mechanism 30 is controlled to be started again to make the bearing platform 11 continue to move along the X-axis direction. Then it is observed whether the hole diameter on the film to be punched meets the requirements, and if not, the above operation is repeated until the hole diameter meets the requirements.

[0073] After the test is completed, the distance measuring structure 55 is adjusted to be zeroed again, and a new film to be punched is replaced to wait for the formal piercing process. Before the formal piercing, the rotation speed of the first moving mechanism 30 and the circular roller 21 and the heating temperature of the circular roller 21 are adjusted. When the first piercing is carried out, the first moving mechanism 30 is controlled to drive the bearing platform 11 to move from left to right along the X-axis direction at a specified speed, and when the bearing platform 11 is detected by the third detection assembly, the circular roller 21 starts to rotate, and the two cooperate with each other to carry out the first piercing. Since the size of each piercing needle in the needle cluster 22 is small, and the distance between any two adjacent piercing needles is small. Therefore, in order to ensure that the positions of the holes in the repeated piercing process do not overlap and the piercing density is increased, the overall position of the bearing platform 11 or the starting time of the circular roller 21 can be adjusted to change the piercing density. For example, the overall density of the bearing platform 11 along the Y-axis direction can be adjusted to realize the density change along the Y-axis direction of the film to be punched, and the change of the starting time of the circular roller 21 can adjust the density change along the X-axis direction of the film to be punched.

[0074] If the overall position of the bearing platform 11 is adjusted, after the first time the film to be punched is punched, the bearing platform 11 is driven to move along the Y-axis direction by the second moving mechanism 40 to realize the position fine adjustment along the Y-axis direction. Then the first time punching operation is repeated to realize the punching density change along the Y-axis direction. If the adjustment of the starting time of the circular roller 21 is adopted, after the first time the film to be punched is punched, the bearing platform 11 is driven to move along the X-axis direction from right to left by the first moving mechanism 30, and after the third detection assembly detects the position of the bearing platform 11, the circular roller 21 can start to rotate after a delay of several milliseconds to change the punching position relative to the film to be punched, thereby realizing the punching density change along the X-axis direction.

[0075] The technical features of the above-described embodiments can be combined in any manner. To make the description concise, all possible combinations of the technical features in the above-described embodiments are not described, but as long as the combinations of the technical features do not contradict each other, they should be considered within the scope of the present disclosure.

[0076] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. A diaphragm punching device characterized by, The application relates to a diaphragm perforating device. The diaphragm perforating device comprises a fixing mechanism (10) and a needle roller mechanism (20). The fixing mechanism (10) comprises a bearing platform (11) for limiting the position of a diaphragm to be perforated. The needle roller mechanism (20) comprises a circular roller (21) with an axis (Y) and a needle cluster (22) arranged around the outer periphery of the circular roller (21).

2. The septum puncturing device of claim 1, wherein, The circular roller (21) can rotate around the axis (Y), and the needle cluster (22) is used for perforating the diaphragm to be perforated.

3. The septum puncturing device of claim 2, wherein, At least one of the fixing mechanism (10) and the needle roller mechanism (20) can move along a first direction (X) which is arranged at an angle with the direction of the axis (Y). The bearing platform (11) is provided with a plurality of adsorption holes (1101) arranged at intervals.

4. The septum puncturing device according to claim 2 or 3, characterized in that The bearing platform (11) is provided with a limiting groove (1102) at the edge.

5. The septum puncturing device of claim 1, wherein, The fixing mechanism (10) further comprises a pressing strip which is movably connected to the bearing platform (11) and is used for limiting the diaphragm to be perforated in the limiting groove (1102).

6. The septum puncturing device according to claim 1 or 5, characterized in that The fixing mechanism (10) further comprises a buffer layer which is arranged on the side of the bearing platform (11) facing the needle roller mechanism (20), and the buffer layer is provided with pores for gas flow.

7. The septum puncturing device of claim 6, wherein, At least one of the fixing mechanism (10) and the needle roller mechanism (20) can move along the direction of the axis (Y). The diaphragm perforating device further comprises a first moving mechanism (30) connected to the bearing platform (11) and used for driving the bearing platform (11) to move along the first direction (X).

8. The septum puncturing device of claim 1 or 5, wherein, The diaphragm perforating device further comprises a second moving mechanism (40) arranged on the first moving mechanism (30) and connected with the bearing platform (11). The second moving mechanism (40) can drive the bearing platform (11) to move along the first direction (X) under the action of the first moving mechanism (30), and the second moving mechanism (40) is used for driving the bearing platform (11) to move along the direction of the axis (Y).

9. The septum puncturing device of claim 8, wherein, The diaphragm perforating device further comprises a fine adjustment mechanism (50) connected with the needle roller mechanism (20) and used for driving the needle roller mechanism (20) to move along a second direction (Z).

10. The septum puncturing device of claim 8, wherein, The second direction (Z), the first direction (X) and the direction of the axis (Y) are arranged at an angle with each other. The second direction (Z), the first direction (X) and the direction of the axis (Y) are arranged perpendicularly with each other. The needle roller mechanism (20) is provided with the fine adjustment mechanism (50) at both ends along the direction of the axis (Y). Each fine adjustment mechanism (50) comprises a driving module (51) and a mounting base (52) connected with the driving module (51), and the circular roller (21) is rotatably connected to the corresponding mounting base (52) at both ends along the direction of the axis (Y).

11. The septum puncturing device of claim 8, wherein, The diaphragm punching device further comprises a support frame (60), the fine adjustment mechanism (50) is connected to the support frame (60), the support frame (60) is provided with an avoiding hole (601) penetrating in the direction of the axis (Y), and part of the needle roller mechanism (20) is arranged in the avoiding hole (601) and can move in the second direction (Z) in the avoiding hole (601).

12. The septum puncturing device of claim 1, wherein, The circular roller (21) is provided with a heat conduction cavity (2101) for filling heat conduction medium, and the heat conduction cavity (2101) is used for heating the circular roller (21).

13. The septum puncturing device of claim 12, wherein, The needle roller mechanism (20) further comprises a heat insulation structure (24), and the heat insulation structure (24) is arranged on the outer peripheral side of the circular roller (21). The heat insulation structure (24) is provided with an opening (2402) on the side facing the bearing platform (11), and the needle cluster (22) protrudes from the opening (2402).

14. The septum puncturing device of claim 12, wherein, The circular roller (21) comprises a needle roller barrel (211) and a heat conduction barrel (212), the needle roller barrel (211) is arranged on the outer peripheral side of the heat conduction barrel (212), the side of the needle roller barrel (211) away from the heat conduction barrel (212) is provided with the needle cluster (22), and the heat conduction barrel (212) surrounds the heat conduction cavity (2101).

15. The septum puncturing device of claim 14, wherein, The inner barrel wall of the needle roller barrel (211) is at least partially attached to the outer barrel wall of the heat conduction barrel (212).

16. The septum puncturing device of claim 14, wherein, The heat conduction barrel (212) comprises at least two separation barrels (2121) arranged from inside to outside, and the heat conduction cavities (2101) are arranged between any two adjacent separation barrels (2121).

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