Cutting equipment for small-specification metallized film detection

Abstract

The invention relates to cutting equipment for small-specification metallized film detection, which comprises a basic rack, and an unwinding roller and a winding roller which are arranged on the upper end surface of the basic rack and are respectively positioned at two ends of the basic rack; the upper end face of the basic rack is further provided with a cutting knife set, and the cutting knife set is located between the unwinding roller and the winding roller. The cutting knife group comprises a knife group shell and a plurality of cutting knives mounted at the upper end of the knife group shell, the knife group shell can be longitudinally and movably mounted on the upper end face of the basic rack, and a longitudinal driving assembly capable of driving the knife group shell to longitudinally move is arranged on one side of the knife group shell; wherein the number of the cutting knives is an odd number, a fixed knife in the middle of the multiple cutting knives is fixed relative to the knife set shell, and other movable knives can transversely move relative to the knife set shell. According to the metallized film cutting device, the cutting width of the metallized film is adjusted by moving the cutting knife, multiple metallized films can be obtained after cutting each time, repeated cutting operation is not needed, and the production efficiency is remarkably improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of metallized film detection, and specifically relates to a cutting device for detecting small-sized metallized films. Background Art

[0002] As the third-generation capacitor product, the self-healing metallized film capacitor has replaced foil capacitors in many fields due to its advantages of small size, strong self-healing ability, low loss, low cost, and convenient installation. The electrode of the metallized film capacitor is composed of a very thin layer of metal (usually aluminum or zinc-aluminum alloy) evaporated onto an organic film, and its thickness is less than 100 nm. As the working voltage on the film increases, the thin film at the electrical weak point will break down to form a discharge channel, and the charge will form a large current through the discharge channel, causing local high temperature. The thin metal layer at the breakdown point will quickly evaporate and diffuse outward, restoring insulation. The local breakdown will not affect the entire capacitor, and this process is called self-healing.

[0003] In the prior art, one end of the metallized film is wound on the unwinding roller, and the other end is wound on the winding roller to unwind the metallized film, and then the metallized film is cut into a suitable width by a cutting knife for testing. However, only a single piece of metallized film can be obtained after each cutting, and multiple cutting operations need to be repeated, resulting in low production efficiency.

[0004] One inventive point of the present application is to provide multiple cutting knives and be able to change the position of the moving knife to adjust the cutting width of the metallized film. After each cutting, multiple pieces of metallized film can be obtained, eliminating the need for multiple repeated cutting operations and significantly improving production efficiency. When changing the position of the moving knife to adjust the cutting width of the metallized film, the rotation angle of the knife group motor is set to correspond to the moving distance of the moving knife. However, precise setting is required for the motor to run from start to stop, otherwise it will affect the accuracy of the moving distance of the moving knife. Coupled with the existence of the transmission error of the lead screw nut, the accuracy of the moving distance of the moving knife is further affected.

[0005] In addition, in the thin film capacitor industry, mainly two types of thin films, aluminum metallized film and zinc-aluminum metallized film, are used, and there are also metal materials with higher process degrees such as magnesium and gold. Both aluminum metallized film and zinc-aluminum metallized film have a certain elasticity. If the metallized film is over-tensioned, it will cause irreversible damage to itself, and if the tension is insufficient, it will affect the cutting accuracy.

[0006] Therefore, there is an urgent need for a cutting device for detecting small-sized metallized films that can solve the above problems. Summary of the Invention

[0007] In order to solve the above problems, the present invention proposes a cutting device for small-size metallized film inspection, comprising a base frame and an unwinding roller and a winding roller installed on the upper end surface of the base frame, wherein the unwinding roller and the winding roller are respectively located at two ends of the base frame;

[0008] The upper end surface of the base frame is also provided with a cutting knife group, and the cutting knife group is located between the unwinding roller and the winding roller;

[0009] The cutting knife group includes a knife group housing and a plurality of cutting knives installed on the upper end of the knife group housing, wherein the knife group housing is longitudinally movably installed on the upper end surface of the base frame, and a longitudinal driving component that can drive the knife group housing to move longitudinally is provided on one side of the knife group housing;

[0010] The number of the cutting knives is an odd number, and a middle fixed knife among the plurality of cutting knives is fixed relative to the knife group housing, while the other movable knives can be laterally displaced relative to the knife group housing.

[0011] Furthermore, a knife set motor and a bidirectional screw rod connected to the knife set motor are arranged inside the knife set housing;

[0012] Among them, a fixed block is rotatably installed in the middle of the bidirectional screw rod, and a plurality of movable nuts are also installed on the bidirectional screw rod, and the movable nuts are arranged on both sides of the fixed block;

[0013] The upper end surfaces of the fixed block and the movable nut are both equipped with a knife seat, and the cutting knife is fixedly installed on the knife seat.

[0014] Furthermore, a plurality of movable positioning members are provided on the upper end surface of the base frame, and the number of the positioning members is the same as that of the movable knives and corresponds one to one, and each positioning member is located on a side of the corresponding movable knife that is away from or close to the fixed knife;

[0015] The movable nut comprises a nut portion and a movable block sleeved on the outer peripheral side of the nut portion, and the nut portion is mounted on a bidirectional screw rod, and a knife seat is mounted on the upper end of the movable block;

[0016] When the position of the movable knife is changed, before the knife seat contacts the positioning piece, the moving block and the nut portion remain relatively fixed; after the knife seat contacts the positioning piece, the moving block and the nut portion rotate relatively.

[0017] Furthermore, a plurality of telescopic grooves are provided on the inner side wall of the moving block, and the plurality of telescopic grooves are distributed in an array along the axis of the moving block;

[0018] A first spring and a hemispherical tooth are arranged in the telescopic slot, the hemispherical tooth is slidably arranged in the telescopic slot, one end of the first spring is connected to the hemispherical tooth, and the other end is connected to the bottom of the telescopic slot;

[0019] A plurality of hemispherical grooves are formed on the outer periphery of the nut portion. The plurality of hemispherical grooves are continuously distributed in an array along the axis of the nut portion, and the shape and size of the hemispherical grooves are matched with those of the hemispherical teeth.

[0020] Further, a positioning assembly is installed on the upper end surface of the tool group housing, and the positioning assembly includes a positioning guide and a plurality of positioning members;

[0021] Among them, a guiding long groove is formed at the upper end of the positioning guide. The positioning member is generally L-shaped and includes a vertical member and a horizontal member integrally formed. The vertical member is slidably installed in the guiding long groove, and the horizontal member is located on the side surface of the tool holder;

[0022] A locking threaded long groove is further provided on the outer side surface of the positioning guide, and a locking bolt corresponding to the vertical member is installed in the locking threaded long groove.

[0023] Further, a tensioning assembly is provided on the upper end surface of the base frame, and the tensioning assembly includes a gantry and a tensioning roller rotatably installed on the gantry. The tensioning roller is arranged between the unwinding roller and the winding roller;

[0024] Among them, a tensioning slide is slidably installed on the front end surface of the gantry. A telescopic mechanism is installed on the lower end surface of the tensioning slide, and a tensioning bracket is installed on the lower end surface of the moving member of the telescopic mechanism. The tensioning roller is rotatably installed on the tensioning bracket.

[0025] Further, the tensioning assembly further includes a tensioning protection mechanism, and the tensioning protection mechanism includes a tensioning frame connecting member;

[0026] The lower end of the tensioning frame connecting member is fixedly connected to the upper end surface of the tensioning bracket, and the tensioning frame connecting member is connected to the moving member;

[0027] Among them, when the resistance received during the downward pressing of the tensioning roller does not exceed the preset value, the moving member and the tensioning frame connecting member move synchronously; when the resistance received during the downward pressing of the tensioning roller reaches the preset value, the moving member and the tensioning frame connecting member move relatively.

[0028] Further, the moving member is configured as a column with a circular cross-section. A protection groove is formed at the lower end of the moving member, and the shape and size of the protection groove are matched with those of the tensioning frame connecting member;

[0029] A sliding groove is formed on the side surface of the tensioning frame connecting member, and a sliding tooth is slidably arranged in the sliding groove;

[0030] A second spring is further arranged in the sliding groove, and one end of the second spring is connected to the sliding tooth, and the other end is connected to the bottom surface of the sliding groove;

[0031] Engaging tooth grooves are formed on the side wall of the protection groove, and the shape and size of the engaging tooth grooves are matched with those of the sliding teeth.

[0032] Furthermore, a guide column is installed at the bottom of the sliding tooth, and the second spring is sleeved on the outer side of the guide column;

[0033] A guide groove is provided in the tensioning frame connecting piece, and the size of the guide groove matches the guide column, and the guide column is at least partially located in the guide groove.

[0034] Furthermore, the knife assembly housing is laterally movably mounted on the upper end surface of the base frame, and a lateral driving component capable of driving the knife assembly housing to move laterally is disposed on the other side of the knife assembly housing;

[0035] The transverse driving assembly includes a transverse moving plate and a transverse moving driving member arranged at the rear side of the transverse moving plate, the transverse moving plate is arranged on the upper end surface of the basic frame so as to be laterally movable, and the transverse moving driving member is drivingly connected to the transverse moving plate;

[0036] The longitudinal drive assembly includes a longitudinal moving plate and a longitudinal moving driving member arranged at the front side of the longitudinal moving plate, the longitudinal moving plate is arranged on the upper end surface of the transverse moving plate so as to be longitudinally movable, and the longitudinal moving driving member is drivingly connected to the longitudinal moving plate;

[0037] The knife assembly housing is fixedly mounted on the upper end surface of the longitudinal movement plate.

[0038] Furthermore, a guide rectangular groove is provided on the upper end surface of the knife assembly housing, and the size of the guide rectangular groove matches the knife seat;

[0039] The knife seat passes through the guide rectangular groove, the lower end is connected with the fixed block and the movable nut, and the upper end is connected with the cutting knife.

[0040] Compared with the prior art, the advantages of the present invention are:

[0041] 1. A plurality of cutting knives are installed on the knife assembly housing, and the number of the cutting knives is an odd number, wherein a fixed knife in the middle of the plurality of cutting knives is fixed relative to the knife assembly housing, and the other movable knives can be laterally displaced relative to the knife assembly housing. Thus, the width of the metallized film cutting can be adjusted by moving the cutting knives. With the above arrangement, multiple pieces of metallized film can be obtained after each cutting, without the need for repeated cutting operations, and the production efficiency is significantly improved.

[0042] 2. When the nut drives the moving knife to the precise position, that is, when the knife seat contacts the positioning piece, although the bidirectional lead screw may still be in the final stage of rotation, the nut automatically stops moving, and the moving knife automatically stops moving accordingly, avoiding excessive movement of the moving knife or premature stopping, eliminating the negative effects caused by the precise setting of the motor running to stop and the transmission error of the lead screw and nut.

[0043] 3. Before the knife seat contacts the positioning piece, under the action of the first spring, the hemispherical tooth enters the hemispherical groove and meshes with it, and the moving block and the nut part remain relatively fixed; after the knife seat contacts the positioning piece, the first spring is squeezed, the hemispherical tooth continuously enters from one hemispherical groove to the adjacent hemispherical groove, the moving block and the nut part rotate relatively, and the nut part automatically stops moving. The nut part automatically stops moving, and the moving knife automatically stops moving, avoiding excessive movement of the moving knife or premature stopping of movement.

[0044] 4. When the metallized film has not yet reached the preset tension level, the actuating member normally drives the tensioning frame connecting member and the tensioning roller to press down synchronously; that is, when the metallized film reaches the preset tension level, although the actuating member is still pressing down, the tensioning frame connecting member and the tensioning roller automatically stop pressing down, thereby automatically eliminating the metallized film from being over-tensioned while ensuring that the metallized film can reach the preset tension level.

[0045] 5. When the resistance encountered by the tensioning roller during the downward pressing process does not exceed the preset value, under the action of the second spring, the sliding tooth always remains in an extended state, the sliding tooth and the meshing tooth groove remain in an meshing state, and the actuating member and the tensioning frame connecting member move synchronously; when the resistance encountered by the tensioning roller during the downward pressing process reaches the preset value, although the actuating member is still pressing down, the elastic force of the second spring is insufficient to keep the sliding tooth in an extended state, the sliding tooth retracts into the sliding groove, and jumps into the next meshing tooth groove, the actuating member and the tensioning frame connecting member produce relative movement, thereby realizing that the tensioning frame connecting member and the tensioning roller automatically stop pressing down. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0047] Figure 1 This is the overall structure diagram of the cutting equipment for small-sized metallized film inspection from one perspective;

[0048] Figure 2 This is the overall structure diagram of the cutting equipment for small-sized metallized film inspection from another perspective;

[0049] Figure 3 for Figure 2 A partial enlarged view of the middle part;

[0050] Figure 4 This is the overall structure diagram of the cutting equipment for small-sized metallized film inspection from another perspective;

[0051] Figure 5 for Figure 4Partial enlarged view at B in [the figure];

[0052] Figure 6 Structural diagram of the cutting tool group;

[0053] Figure 7 For Figure 6 Partial enlarged view at C in [the figure];

[0054] Figure 8 Internal structural diagram of the cutting tool group;

[0055] Figure 9 Front view of the partial internal structure of the cutting tool group

[0056] Figure 10 For Figure 9 Cross-sectional view at A-A in [the figure];

[0057] Figure 11 Structural diagram of part of the tensioning component;

[0058] Figure 12 Front view of the partial structure of the tensioning component;

[0059] Figure 13 For Figure 12 Cross-sectional view at B-B in [the figure];

[0060] Figure 14 For Figure 13 Partial enlarged view at D in [the figure];

[0061] In the figure, there are a base frame 100, an unwinding roller 110, an unwinding bracket 111, a winding roller 120, a U-shaped bracket 121, a winding motor 122, a control system 130, a universal wheel 140, a reinforced flat plate 150, a telescopic support leg 160, a cutting knife group 200, a knife group housing 210, a guiding rectangular groove 211, a cutting knife 220, a fixed knife 221, a moving knife 222, a longitudinal driving assembly 230, a longitudinally moving plate 231, a longitudinally moving driving member 232, a transverse driving assembly 240, a transversely moving plate 241, a transversely moving driving member 242, a knife group motor 250, a coupling 251, a support bearing 252, a bidirectional lead screw 260, a smooth rod section 261, a lead screw section 262, a fixed block 270, a bearing 271, a moving nut 280, a nut portion 281, a moving block 282, a hemispherical groove 283, a telescopic groove 284, a first spring 285, a hemispherical tooth 286, a knife seat 290, a tensioning assembly 300, a tensioning roller 310, a gantry 320, a transverse slide rail 321, a tensioning slide carriage 330, a vertical part 331, a sliding driving member 332, a transverse part 333, a telescopic mechanism 340, an operating member 341, a tensioning bracket 350, a positioning assembly 400, a positioning member 410, a vertical member 411 and a transverse member 412, a positioning guiding member 420, a guiding long slot 421, a locking threaded long slot 422, a locking bolt 430, a tensioning protection mechanism 500, a tensioning frame connecting member 510, a sliding slot 511, a sliding tooth 512, a second spring 513, a guiding column 514, a guiding slot 515, a protection slot 520, and a meshing tooth groove 521. Detailed implementation manners

[0062] In order to make the purpose, technical solutions and advantages of the present application clearer and more understandable, the present application will be described and explained below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application. Based on the embodiments provided by the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0063] As Figure 1-14 shown, this embodiment provides a cutting device for detecting small-sized metallized films, including a base frame 100, an unwinding roller 110 and a winding roller 120 installed on the upper end surface of the base frame 100. Among them, the unwinding roller 110 and the winding roller 120 are respectively located at both ends of the base frame 100; a cutting knife group 200 is further arranged on the upper end surface of the base frame 100, and the cutting knife group 200 is located between the unwinding roller 110 and the winding roller 120.

[0064] It can be understood that the surface of the unwinding roller 110 is wound with a metallized film, and the winding roller 120 is used to wind the metallized film before cutting. After the metallized film is output from the surface of the unwinding roller 110 and wound onto the winding roller 120, the bottom surface of the metallized film can be cut by the cutting knife group 200. Specifically, a unwinding bracket 111 is provided on the upper end surface of the base frame 100, and the unwinding roller 110 is rotatably installed on the unwinding bracket 111; a U-shaped bracket 121 is also provided on the upper end surface of the base frame 100, and the winding roller 120 is rotatably installed inside the U-shaped bracket 121. A winding motor 122 for driving the winding roller 120 to rotate is fixedly provided on one outer side of the U-shaped bracket 121.

[0065] In the cutting knife group 200 of this embodiment, it includes a knife group housing 210 and a cutting knife 220 installed at the upper end of the knife group housing 210. Among them, the knife group housing 210 is longitudinally movably installed on the upper end surface of the base frame 100, and a longitudinal driving component 230 for driving the longitudinal movement of the knife group housing 210 is provided on one side of the knife group housing 210, so as to drive the knife group housing 210 to drive the cutting knife 220 to move longitudinally through the longitudinal driving component 230 and cut the bottom surface of the metallized film. Preferably, the knife group housing 210 is also transversely movably installed on the upper end surface of the base frame 100, and a transverse driving component 240 for driving the transverse movement of the knife group housing 210 is provided on the other side of the knife group housing 210, so as to drive the knife group housing 210 to drive the cutting knife 220 to move transversely through the transverse driving component 240, thereby adjusting the cutting position of the metallized film.

[0066] Specifically, the transverse driving component 240 includes a transverse moving plate 241 and a transverse moving driving member 242 provided at the rear side of the transverse moving plate 241. Among them, the transverse moving plate 241 is transversely movably arranged on the upper end surface of the base frame 100, and the transverse moving driving member 242 is in transmission connection with the transverse moving plate 241; the longitudinal driving component 230 includes a longitudinal moving plate 231 and a longitudinal moving driving member 232 provided at the front side of the longitudinal moving plate 231. Among them, the longitudinal moving plate 231 is longitudinally movably arranged on the upper end surface of the transverse moving plate 241, the longitudinal moving driving member 232 is in transmission connection with the longitudinal moving plate 231, and the knife group housing 210 is fixedly installed on the upper end surface of the longitudinal moving plate 231.

[0067] It can be understood that in the prior art, one end of the metallized film is wound on the unwinding roller 110, and the other end is wound on the winding roller 120, so as to unwind the metallized film, and then the metallized film is cut into a suitable width by the cutting knife 210 for testing. However, only a single piece of metallized film can be obtained after each cutting, and the cutting operation needs to be repeated many times, resulting in low production efficiency.

[0068] In order to eliminate the above defects, in this embodiment, a plurality of cutting knives 220 are installed on the knife assembly housing 210, and the number of the cutting knives 220 is an odd number, wherein a middle fixed knife 221 among the plurality of cutting knives 220 is fixed relative to the knife assembly housing 210, and the other movable knives 222 can be laterally displaced relative to the knife assembly housing 210. Thus, the width of the metallized film cut can be adjusted by moving the cutting knives 220.

[0069] Through the above arrangement, multiple pieces of metallized film can be obtained after each cutting, without the need for repeated cutting operations, and the production efficiency is significantly improved.

[0070] Specifically, the interior of the knife group housing 210 is provided with a knife group motor 250 and a bidirectional screw rod 260 which is transmission-connected to the knife group motor 250, wherein a fixed block 270 is rotatably installed in the middle part of the bidirectional screw rod 260, and a plurality of movable nuts 280 are also installed on the bidirectional screw rod 260, and the movable nuts 280 are arranged on both sides of the fixed block 270; a knife seat 290 is installed on the upper end surfaces of the fixed block 270 and the movable nut 280, and the cutting knife 220 is fixedly installed on the knife seat 290.

[0071] Thus, when adjusting the cutting width of the metallized film, the knife group motor 250 drives the bidirectional screw 260 to rotate, the fixed block 270 and the fixed knife 221 remain stationary, and the movable nuts 280 on both sides drive the movable knife 222 to move. Through this setting, only a simple screw nut pair is needed to complete the adjustment of the distance between a plurality of cutting knives 220, and the adjustment of the cutting width of the metallized film can be completed efficiently. Preferably, the upper end surface of the knife group housing 210 is provided with a guide rectangular groove 211, and the size of the guide rectangular groove 211 matches the knife seat 290, and the knife seat 290 passes through the guide rectangular groove 211, so that the lower end is connected to the fixed block 270 and the movable nut 280, and the upper end is connected to the cutting knife 220. It can be understood that the guide rectangular groove 211 can limit the rotation of the fixed block 270 and the movable nut 280.

[0072] Preferably, a coupling 251 and two support bearings 252 are also provided inside the knife group housing 210, and the two ends of the bidirectional screw rod 260 are respectively installed on the two support bearings 252, and the output end of the knife group motor 250 is connected to the bidirectional screw rod 260 through the coupling 251; the bidirectional screw rod 260 includes a middle smooth rod segment 261 and screw rod segments 262 at both ends, the fixed block 270 is rotatably installed on the smooth rod segment 261 through the bearing 271 inside it, and the movable nut 280 is installed on the screw rod segment 262.

[0073] It should be noted that when the position of the movable knife 212 is changed to adjust the width of the metallized film cutting, the distance the movable knife 212 moves is corresponding to the rotation angle of the knife group motor 250. However, the motor needs to be accurately set to stop, otherwise it will affect the accuracy of the moving distance of the movable knife 212. In addition, the existence of the screw nut transmission error further affects the accuracy of the moving distance of the movable knife 212.

[0074] In order to eliminate the above defects, in this embodiment, a plurality of movable positioning members 410 are provided on the upper end surface of the base frame 100, and the number of the positioning members 410 is the same as that of the movable knife 212 and corresponds to each other, and each positioning member 410 is located on the side of the corresponding movable knife 212 that is away from (or close to) the fixed knife 221. Therefore, the position of the positioning member 410 is adjusted in advance as a reference, and when the position of the movable knife 212 is changed to adjust the width of the metallized film cutting, the precise position of the movable knife 222 is reached when the knife seat 290 reaches the positioning member 410.

[0075] The movable nut 280 includes a nut portion 281 and a movable block 282 sleeved on the outer peripheral side of the nut portion 281, and the nut portion 281 is installed on the bidirectional screw rod 260, and the upper end of the movable block 282 is installed with a knife seat 290; wherein, when the position of the movable knife 212 is changed to adjust the width of the cutting of the metallized film, before the knife seat 290 contacts the positioning member 410, the movable block 282 and the nut portion 281 remain relatively fixed; after the knife seat 290 contacts the positioning member 410, the movable block 282 and the nut portion 281 rotate relative to each other.

[0076] Through the above arrangement, when the nut portion 281 drives the movable knife 222 to reach the precise position, that is, when the knife seat 290 contacts the positioning piece 410, although the bidirectional lead screw 260 may still be in the final stage of rotation, the nut portion 281 automatically stops moving, and the movable knife 222 automatically stops moving accordingly, thereby avoiding excessive movement of the movable knife 222 or premature stopping of movement, and eliminating the negative effects caused by the precise setting of the motor running to stop and the transmission error of the lead screw and nut.

[0077] In this embodiment, the inner wall of the moving block 282 is provided with a plurality of telescopic grooves 284, and the plurality of telescopic grooves 284 are arranged in an array along the axis of the moving block 282. A first spring 285 and a hemispherical tooth 286 are arranged in the telescopic groove 284, and the hemispherical tooth 286 is slidably arranged in the telescopic groove 284. One end of the first spring 285 is connected to the hemispherical tooth 286, and the other end is connected to the bottom of the telescopic groove 284. Correspondingly, the outer periphery of the nut portion 281 is provided with a plurality of hemispherical grooves 283, and the plurality of hemispherical grooves 283 are continuously arranged in an array along the axis of the nut portion 281, and the shape and size of the hemispherical grooves 283 match the hemispherical tooth 286.

[0078] With the above settings, before the tool holder 290 touches the positioning member 410, under the action of the first spring 285, the hemispherical tooth 286 enters the hemispherical groove 283 and meshes with it, and the moving block 282 and the nut portion 281 remain relatively fixed; after the tool holder 290 touches the positioning member 410, the first spring 285 is compressed, and the hemispherical tooth 286 continuously enters from one hemispherical groove 283 into the adjacent hemispherical groove 283, and the moving block 282 and the nut portion 281 rotate relative to each other, and the nut portion 281 automatically stops moving.

[0079] As a preferred embodiment, a positioning assembly 400 is installed on the upper end surface of the tool group housing 210, and the positioning assembly 400 includes a positioning guide member 420 and a plurality of positioning members 410. Among them, a guide long groove 421 is opened at the upper end of the positioning guide member 420, the positioning member 410 is generally L-shaped, and includes a vertically integrated vertical member 411 and a horizontal member 412. The vertical member 411 is slidably installed in the guide long groove 421, the horizontal member 412 is located on the side of the tool holder 290, and a locking threaded long groove 422 is further provided on the outer side surface of the positioning guide member 420, and a locking bolt 430 corresponding to the vertical member 411 is installed in the locking threaded long groove 422.

[0080] Thus, when adjusting the position of the positioning member 410 to serve as a new reference, loosen the locking bolt 430, then move the positioning member 410 to reach the preset position, and finally tighten the locking bolt 430 to fix the positioning member 410. Preferably, a scale line (not shown) is provided on the upper end surface of the positioning guide member 420.

[0081] In this embodiment, a rotatable tension roller 310 is further provided between the unwinding roller 110 and the winding roller 120. Thus, after the metallized film is output from the unwinding roller 101, it passes through the tension roller 310 and then winds around the winding roller 120 to improve the stability and tension of the metallized film. Among them, the cutting tool group 200 is disposed between the tension roller 310 and the unwinding roller 110.

[0082] Specifically, a tensioning assembly 300 is provided on the upper end surface of the base frame 100, and the tensioning assembly 300 includes a gantry 320 and a tension roller 310 rotatably installed on the gantry 320. Among them, a tensioning slide 330 is slidably installed on the front end surface of the gantry 320, a telescopic mechanism 340 is installed on the lower end surface of the tensioning slide 330, and a tensioning bracket 350 is installed on the lower end surface of the moving member 341 of the telescopic mechanism 340. The tension roller 310 is rotatably installed on the tensioning bracket 350.

[0083] Thus, the tension position of the tension roller 310 is adjusted by the lateral displacement of the tension carriage 330, and the tension degree of the metallized film is adjusted by driving the longitudinal displacement of the tension bracket 350 through the telescopic mechanism 340. Preferably, a lateral slide rail 321 is provided on the front end face of the gantry 320. The tension carriage 330 is generally L-shaped. A sliding drive member 332 is provided at the rear end of its vertical portion 331. The telescopic mechanism 340 is installed on the lower end face of the lateral portion 333 of the tension carriage 330.

[0084] It can be understood that in the thin film capacitor industry, two types of thin films, namely aluminum metallized film and zinc-aluminum metallized film, are mainly used. At the same time, there are also metal materials such as magnesium and gold with relatively high process degrees. Both the aluminum metallized film and the zinc-aluminum metallized film have a certain elasticity. If the metallized film is over-tensioned, it will cause irreversible damage to itself. If the tension degree is insufficient, it will affect the cutting accuracy.

[0085] To eliminate the above defects, the tension assembly 300 of the present embodiment further includes a tension protection mechanism 500. The tension protection mechanism 500 includes a tension bracket connecting member 510. Among them, the lower end of the tension bracket connecting member 510 is fixedly connected to the upper end face of the tension bracket 350. The tension bracket connecting member 510 is connected to the actuating member 341. Thus, in the normal state, the actuating member 341 drives the tension bracket connecting member 510 and the tension roller 310 to press down synchronously.

[0086] Among them, when the resistance received by the tension roller 310 during the pressing down process does not exceed the preset value, the actuating member 341 and the tension bracket connecting member 510 move synchronously; when the resistance received by the tension roller 310 during the pressing down process reaches the preset value, the actuating member 341 and the tension bracket connecting member 510 generate relative movement. Thus, when the resistance received by the tension roller 310 during the pressing down process does not exceed the preset value, that is, when the metallized film has not reached the preset tension degree, the actuating member 341 normally drives the tension bracket connecting member 510 and the tension roller 310 to press down synchronously; when the resistance received by the tension roller 310 during the pressing down process reaches the preset value, that is, when the metallized film reaches the preset tension degree, although the actuating member 341 is still pressing down, the tension bracket connecting member 510 and the tension roller 310 automatically stop pressing down, thereby automatically eliminating the over-tensioning of the metallized film while ensuring that the metallized film can reach the preset tension degree.

[0087] Specifically, the moving member 341 is configured as a cylinder with a circular cross-section. A protection groove 520 is formed at the lower end of the moving member 341, and the shape and size of the protection groove 520 are matched with those of the tensioning frame connecting member 510. A sliding groove 511 is formed on the side surface of the tensioning frame connecting member 510, and a sliding tooth 512 is slidably disposed in the sliding groove 511. A second spring 513 is further disposed in the sliding groove 511. One end of the second spring 513 is connected to the sliding tooth 512, and the other end is connected to the bottom surface of the sliding groove 511. A meshing tooth groove 521 is formed on the side wall of the protection groove 520, and the shape and size of the meshing tooth groove 521 are matched with those of the sliding tooth 512.

[0088] Thus, when the resistance received during the downward pressing of the tensioning roller 310 does not exceed the preset value, under the action of the second spring 513, the sliding tooth 512 always remains in the extended state, the sliding tooth 512 and the meshing tooth groove 521 remain in the meshing state, and the moving member 341 and the tensioning frame connecting member 510 move synchronously. When the resistance received during the downward pressing of the tensioning roller 310 reaches the preset value, although the moving member 341 is still being pressed downward, the elastic force of the second spring 513 is not sufficient to keep the sliding tooth 512 in the extended state all the time. The sliding tooth 512 retracts into the sliding groove 511 and jumps into the next meshing tooth groove 521, and a relative movement occurs between the moving member 341 and the tensioning frame connecting member 510. Thus, the tensioning frame connecting member 510 and the tensioning roller 310 automatically stop pressing downward, automatically preventing the metallized film from being over-tensioned while ensuring that the metallized film can reach the preset tension level.

[0089] Preferably, the number of the sliding teeth 512 can be multiple to increase the meshing stability. The number of the meshing tooth grooves 521 is more than that of the sliding teeth 512, thereby allowing a relative movement between the tensioning frame connecting member 510 and the moving member 341.

[0090] It can be understood that the second spring 513 in this embodiment can be configured as an adjustable electric spring to match different tension force values. In addition, once the resistance received during the downward movement of the tensioning roller 310 exceeds the preset value, that is, the compression force received by the second spring 513 becomes larger, the second spring 513 can also feedback to the control system 130 to enable the telescopic mechanism 340 to stop operating in a timely manner.

[0091] Preferably, a guide post 514 is installed at the bottom of the sliding tooth 512. The second spring 513 is sleeved outside the guide post 514. A guide groove 515 is formed in the tensioning frame connecting member 510, and the size of the guide groove 515 is matched with that of the guide post 514. At least a part of the guide post 514 is located in the guide groove 515. Thus, the movement stability of the sliding tooth 512 is further increased.

[0092] In the cutting device for detecting small-sized metallized films of this embodiment, universal wheels 140 are provided at the four corners of the lower end surface of the base frame 100 to facilitate the change of the overall position of the device. Preferably, a reinforced plate 150 is installed at the four corners of the lower end surface of the base frame 100, and the universal wheels 140 are installed on the lower end surface of the reinforced plate 150, wherein the reinforced plate 150 is also equipped with a telescopic support leg 160, so that when the device is moved, the telescopic support leg 160 is retracted so that the universal wheel 140 contacts the ground, and when the device is in use, the telescopic support leg 160 is lowered so that the universal wheel 140 contacts the ground, thereby enhancing the stability of the device during operation.

[0093] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A cutting device for testing small-sized metallized films, comprising a base frame and an unwinding roller and a winding roller mounted on the upper end surface of the base frame, wherein: The unwinding roller and the rewinding roller are respectively located at two ends of the basic frame; The upper end surface of the base frame is also provided with a cutting knife group, and the cutting knife group is located between the unwinding roller and the winding roller; The cutting knife group comprises a knife group housing and a plurality of cutting knives mounted on the upper end of the knife group housing, wherein the knife group housing is mounted on the upper end surface of the base frame in a longitudinally movable manner, and a longitudinal driving component capable of driving the knife group housing to move longitudinally is provided on one side of the knife group housing; The number of the cutting knives is an odd number, and a middle fixed knife among the plurality of cutting knives is fixed relative to the knife group housing, while the other movable knives can be laterally displaced relative to the knife group housing.

2. The small-sized metallized film inspection cutting device according to claim 1 is characterized in that: A knife set motor and a bidirectional screw rod connected to the knife set motor are arranged inside the knife set housing; Among them, a fixed block is rotatably installed in the middle of the bidirectional screw rod, and a plurality of movable nuts are also installed on the bidirectional screw rod, and the movable nuts are arranged on both sides of the fixed block; The upper end surfaces of the fixed block and the movable nut are both equipped with a knife seat, and the cutting knife is fixedly installed on the knife seat.

3. The small-sized metallized film inspection cutting device according to claim 2, characterized in that: The upper end surface of the basic frame is provided with a plurality of movable positioning members, and the number of the positioning members is the same as that of the movable knives and corresponds one to one, and each positioning member is located on the side of the corresponding movable knife away from or close to the fixed knife; The movable nut comprises a nut portion and a movable block sleeved on the outer peripheral side of the nut portion, and the nut portion is mounted on a bidirectional screw rod, and a knife seat is mounted on the upper end of the movable block; When the position of the movable knife is changed, before the knife seat contacts the positioning piece, the moving block and the nut portion remain relatively fixed; after the knife seat contacts the positioning piece, the moving block and the nut portion rotate relatively.

4. The small-sized metallized film inspection cutting device according to claim 3, characterized in that: A positioning assembly is installed on the upper end surface of the knife assembly housing, and the positioning assembly includes a positioning guide and a plurality of positioning members; The upper end of the positioning guide member is provided with a guide slot, the positioning member is substantially L-shaped, and comprises an integrally formed vertical member and a horizontal member, the vertical member is slidably mounted in the guide slot, and the horizontal member is located on the side of the knife seat; The outer side surface of the positioning guide piece is also provided with a locking thread long groove, and a locking bolt corresponding to the vertical piece is installed in the locking thread long groove.

5. The small-sized metallized film inspection cutting device according to claim 1, characterized in that: The upper end surface of the base frame is provided with a tensioning assembly, and the tensioning assembly includes a gantry and a tensioning roller rotatably mounted on the gantry, and the tensioning roller is arranged between the unwinding roller and the winding roller; Among them, the front end surface of the gantry is installed with a tensioning slide in a transversely slidable manner, the lower end surface of the tensioning slide is installed with a telescopic mechanism, and the lower end surface of the actuating part of the telescopic mechanism is installed with a tensioning bracket, and the tensioning roller is rotatably installed on the tensioning bracket.

6. The small-sized metallized film inspection cutting device according to claim 5, characterized in that: The tensioning assembly also includes a tensioning protection mechanism, and the tensioning protection mechanism includes a tensioning frame connecting piece; The lower end of the tensioning frame connecting piece is fixedly connected to the upper end surface of the tensioning bracket, and the tensioning frame connecting piece is connected to the actuating piece; Among them, when the resistance encountered by the tensioning roller during the downward pressing process does not exceed the preset value, the actuating member and the tensioning frame connecting member move synchronously; when the resistance encountered by the tensioning roller during the downward pressing process reaches the preset value, the actuating member and the tensioning frame connecting member produce relative movement.

7. The small-sized metallized film inspection cutting device according to claim 6, characterized in that: The action piece is configured as a column with a circular cross section, and a protection groove is provided at the lower end of the action piece, and the shape and size of the protection groove match the tension frame connecting piece; A sliding groove is provided on the side of the tensioning frame connecting piece, and a sliding tooth is slidably provided in the sliding groove; A second spring is also arranged in the sliding groove, and one end of the second spring is connected to the sliding tooth, and the other end is connected to the bottom surface of the sliding groove; The side wall of the protection groove is provided with an engaging tooth groove, and the shape and size of the engaging tooth groove match the sliding tooth.

8. The small-sized metallized film inspection cutting device according to claim 7, characterized in that: A guide column is installed at the bottom of the sliding tooth, and the second spring is sleeved on the outer side of the guide column; A guide groove is provided in the tensioning frame connecting piece, and the size of the guide groove matches the guide column, and the guide column is at least partially located in the guide groove.

9. The small-sized metallized film inspection cutting device according to claim 1, characterized in that: The knife assembly housing is installed on the upper end surface of the base frame in a transversely movable manner, and a transverse driving component that can drive the knife assembly housing to move transversely is provided on the other side of the knife assembly housing; The transverse driving assembly includes a transverse moving plate and a transverse moving driving member arranged at the rear side of the transverse moving plate, the transverse moving plate is arranged on the upper end surface of the basic frame so as to be laterally movable, and the transverse moving driving member is drivingly connected to the transverse moving plate; The longitudinal drive assembly includes a longitudinal moving plate and a longitudinal moving driving member arranged at the front side of the longitudinal moving plate, the longitudinal moving plate is arranged on the upper end surface of the transverse moving plate so as to be longitudinally movable, and the longitudinal moving driving member is drivingly connected to the longitudinal moving plate; The knife assembly housing is fixedly mounted on the upper end surface of the longitudinal movement plate.

10. The small-sized metallized film inspection cutting device according to claim 4, characterized in that: A guide rectangular groove is provided on the upper end surface of the knife assembly housing, and the size of the guide rectangular groove matches the knife seat; The knife seat passes through the guide rectangular groove, the lower end is connected with the fixed block and the movable nut, and the upper end is connected with the cutting knife.

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