JP2000107820A - Device for punching sheet, method for punching sheet and punched sheet manufactured using them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a thin sheet excellent in flatness without camber and bend by providing punching rolls having many projections as alternately plural upper rolls and lower rolls so as to alternately about on the upper and lower surfaces of the sheet to be punched. SOLUTION: A disk-shaped roll 1 for punching the thin metal sheet on which plural punching edge parts 2 are carved projecting in the radius direction with a certain interval in the circumferential direction on the outer peripheral surface, upper side guide rolls 3 whose diameter is smaller than the length from the center of this roll to the lowest part of the edge of the punching edge parts 2 by not less than the thickness of the metal sheet 10, spacer 13 equal to the thickness of the guide rolls 4 having slightly larger thickness than thickness of the rolls 1, and guide rolls having the equal diameter and thickness to the rolls 4 are coaxially connected. The upper roll part 11 is formed by connecting the plural sets of this roll groups, similarly lower roll part 12 is faced to each other. By rotating each roll and passing the metal sheet 10 through, the sheet is continuously punched while imparting tension to the sheet.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a thin plate punching device for continuously punching holes in a long strip-shaped thin plate, a thin plate punching method, and a thin plate punching device and a thin plate punching method. It relates to a perforated thin plate.

[0002]

2. Description of the Related Art In recent years, a thin plate such as a perforated metal plate having a large number of holes used for an electrode substrate of a secondary battery electrode has a thickness of several mm.
There is a growing demand for a porous thin plate having a large number of small holes. The perforated metal plate for the secondary battery electrode base is wound with an active material adhered to the surface thereof and filled in the battery container. The holes are formed in the metal plate for the purpose of providing an anchor effect for urging the active material to adhere to the metal plate and also filling the holes with the active material. In order to increase the battery capacity, it is necessary to fill the battery container with as much active material as possible. For this reason, a perforated metal plate for an electrode substrate is required to be as thin as possible. Conventionally, a method of manufacturing a perforated thin plate such as a perforated metal plate has generally been a method of punching using a punching press. However, a perforating method using a press device is a method in which a metal plate to be perforated is supplied intermittently. Therefore, it is necessary to stop the metal plate at the time of press working, and in combination with applying a huge force to the pressing device, it is extremely difficult to increase the drilling speed and improve the productivity of the drilled metal plate. It was difficult.

As a method for improving the productivity of a perforated metal plate by increasing the perforation speed, a method for continuously producing a perforated metal plate by rotating a perforation roller having a large number of projections is disclosed in Japanese Patent Application Laid-Open No. HEI-60-160. No. 133936.
The production of this perforated metal plate is performed as follows. That is, first, by continuously passing a metal plate between a roller provided with a number of serrated protrusions on the outer periphery and a receiving roller,
A return is cut and raised at the same time as the hole is formed by the projection. The perforated metal plate advances continuously, and the tip of a scratching jig provided in front is returned, and the return is folded back. Further, the metal plate advances continuously, is fed to a rolling roller provided in the front, and is rolled, and the return bites into the metal plate, thereby forming a perforated metal plate without burrs.

[0004] When the above-described method for manufacturing a perforated metal plate is used, continuous perforation can be performed, the perforation speed is increased, and the productivity of the perforated metal plate is improved. Is about twice the thickness of the original metal plate. When used as a perforated metal plate for a secondary battery electrode substrate, the metal plate is used to attach the active material to the surface, wind it up and fill it into the battery container. Since the volume of the battery itself increases, the amount of the active material filled decreases accordingly, which is not preferable for increasing the battery capacity. Also, in the case of strengthening the rolling to make the folded portion the same thickness as the other portion, the thickness of the folded portion is almost twice as large as the other portion, so only this portion is extremely rolled and extended. In addition, the distance between the perforated holes increases, the perforation density decreases, and when used as a perforated metal plate for a secondary battery electrode base, the anchor effect becomes insufficient and the amount of active material filled in the holes is reduced. Is also reduced, which is not preferable.

[0005] Further, even if a hole is formed in a thin plate such as a metal plate using any of the above methods, if a punch or a projection is inserted from only one side of the thin plate and the hole is punched, the thin plate is processed by drilling. In this case, processing distortion occurs, and warpage or bending occurs, and the flatness of the thin plate is lost.

[Problems to be solved by the invention]

The present invention relates to a thin plate punching device and a thin plate punching method used for continuously and continuously drilling holes in a long strip shape, and a thin plate punching device and a warp formed by using the thin plate punching method. An object of the present invention is to provide a thin plate having no flatness or bending and excellent in flatness.

[0007]

SUMMARY OF THE INVENTION The present invention is an apparatus for perforating a plurality of holes in a thin plate or a thin foil, wherein a plurality of holes are formed on a peripheral surface of a disk-shaped roll having a constant thickness. A disc-shaped roll for punching a thin plate, which is formed by opening and projecting a plurality of blade portions for punching in the radial direction, and coaxially connected to one side of the disc-shaped roll for the thin plate punching, A disc-shaped side guide roll having a radius smaller than the length from the center of the perforating disc-shaped roll to the lowest part of the blade of the perforating blade by at least the thickness of the thin plate, and the disc for perforating the thin plate Coaxially connected to the other side of the shape roll, a side guide roll having the same diameter and thickness as the side guide roll, and coaxially connected to the other side of the side guide roll, Less than the thickness of the disk of the disk-shaped roll for thin plate punching And a disc-shaped guide roll having a diameter and thickness smaller than the diameter of the side guide roll and having the same diameter and thickness as a guide roll of a lower roll portion described later. A plurality of sets of rolls are coaxially connected, and a side guide roll having the same diameter and thickness as the side guide rolls is coaxially arranged on one side of a guide roll or a disc-shaped roll for thin plate punching located at the end. And a guide roll having the same diameter and thickness as the guide roll, and coaxially connected to one side of the guide roll, and having the same diameter and thickness as the side guide roll. And a side guide roll coaxially connected to the other side of the guide roll and having the same diameter and thickness as the side guide roll. , Which is coaxially connected to the other side of the side guide roll, and has the same diameter, thickness and cutting edge for punching as a thin plate. One set of roll groups is coaxially connected, and a side guide roll having the same diameter and thickness as the side guide roll is provided on one side of the thin plate punching disc-shaped roll or guide roll located at the end. Are coaxially connected to form a lower roll portion, such that the upper roll portion and the lower roll portion each face a disc-shaped roll for thin plate perforation and a guide roll.
The upper roll portion and the lower roll portion are fitted to each other to form a perforated portion that can be perforated while passing through the thin plate, and tension is provided in front and rear of the perforated portion by tension applying means for applying tension to the thin plate. It is a thin plate punching device in which the application portions are connected to each other, wherein the shape of the drilling section of the drilling blade is a rectangle or a substantially rectangular shape with rounded corners, or the shape of the drilling section of the drilling blade is It is characterized by an ellipse, an ellipse, a perfect circle, a rhombus, or a substantially rhombus with a rounded square instead of a substantially rectangle, and a pair of upper and lower pinch rolls in which the tension applying means sandwiches the thin plate. It is characterized by comprising a pair of bridle rolls. In addition, the present invention uses the thin plate punching device, and passes the thin plate through a pair of tension applying portions disposed respectively in front and rear of the punching portion,
While applying tension to the thin plate by tension applying means constituting the tension applying section, rotating each roll constituting the perforating section, the thin sheet punching method is also characterized in that the thin sheet is continuously punched. The subject of the invention. Further, the present invention is also directed to a perforated thin plate manufactured by using the above-mentioned thin plate punching apparatus and a thin plate punching method, wherein the thin plate is a metal plate or a metal foil, % Or more is a metal plate or a metal foil having an aperture ratio of not less than%.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, there is provided a thin plate punching apparatus and a thin plate for manufacturing a long strip-shaped thin plate, in particular, a punched thin plate for continuously punching holes in a metal plate or a metal foil used for a secondary battery electrode base. A drilling method was developed. Furthermore, by using the thin plate punching device and the thin plate punching method, even in a thin metal foil, it has a uniform thickness in which many uniform holes are formed, and has excellent flatness without warpage or bending. It has become possible to produce perforated sheets.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. The disk-shaped roll for thin plate punching used in the thin plate punching device of the present invention is a thin plate such as a metal plate or a metal foil having a thickness of about 0.02 to 0.2 mm, or a resin having a thickness of about 1 to several mm. A punching blade which is provided on a plate or sheet of paper or the like and which continuously drills a large number of holes in the outer periphery of a disk-shaped roll 1 at intervals in a circumferential direction as shown in FIG. A plurality of portions 2 are protruded in the radial direction and engraved, and a cross-section of the perforation of the perforation blade portion 2 is a single closed line, and is a geometrical figure such as a rectangle. The cutting edges of both blades 23 of the drilling blade portion 2 corresponding to the portions of the closing lines on both sides facing each other along the circumferential direction of the disc-shaped roll 1 in the perforated cross section of the portion 2 have a thickness of the disc-shaped roll 1. The cutting edges of the blades 21 and 22 of the blade portion corresponding to the portions of the closing lines on both sides facing each other along the And characterized by being engraved so as to protrude lower than the imaginary straight line 24 connecting the. The perforation cross section of the perforation blade 2 may be, for example, a rectangle formed by a front edge 21, a rear edge 22, and a side edge 23 as shown in FIG. In the rectangular perforated cross section, left and right side edges 23 (two), which are blade portions facing each other along the circumferential direction of the disk-shaped roll 1.
Are engraved so as to protrude lower than an imaginary straight line 24 connecting the vertices of the front edge 21 and the rear edge 22 which are the blade portions facing each other along the thickness direction of the disc-shaped roll 1.

The blade portions 21 and 22 of the drilling blade portion 2 which oppose each other along the thickness direction of the disk-shaped roll 1 are first cut into the thin plate 10 with the rotation of the disk-shaped roll 1. By projecting the portion 21 of the blade lower than the portion 22 of the blade that cuts into the thin plate 10 later,
As shown in FIG. 3, it is also possible for the blade parts 21 and 22 to bite into the sheet 10 at the same time. Further, the cross-sectional shape of the drilling blade portion 2 is not limited to the above-described rectangle or substantially rectangular shape, but may be any other shape such as an ellipse, an ellipse, a perfect circle, a rhombus, or a substantially rhombus having a rounded square. Even a figure can be punched.

As shown in FIG. 5, the punching portion of the thin plate punching device of the present invention extends from the center of the thin plate punching disc-shaped roll 1 to the lowest portion of the blade of the punching blade portion 2 (the lowest portion of the blade 23). A disc-shaped roll having a radius smaller than the length of the thin plate 10 by at least the thickness of the thin plate 10 is coaxially connected as a side guide roll 3 to one side of the disc-shaped roll 1 for punching a thin plate. 1, a side guide roll 3 having the same diameter and thickness as the side guide roll 3 is coaxially connected to one other side, and spacers 13 are inserted into both sides of the disc-shaped roll 1 for punching a thin plate. The thickness of the guide roll 4 having a thickness slightly larger than the thickness of the disc-shaped roll 1 for forming a thin plate to be formed is adjusted to be equal to the thickness of the guide roll 4 and the other side of the side guide roll 3 is provided with a disc for forming a thin plate. Roll 1
And has a thickness slightly larger than the thickness of the disc and a diameter smaller than the diameter of the side guide roll 3, and has the same diameter and thickness as the guide roll 4 of the lower roll section described later. The guide rolls 4 are coaxially connected, a group of these coaxially connected rolls is set as one set, and a plurality of sets of the roll groups are coaxially connected. A plurality of sets of the guide rolls 4 located at the end of the plurality of coaxially connected sets or, if necessary, a side guide roll 3 on one side of the thin plate punching disc 1.
The side guide rolls 3 having the same diameter and thickness as those described above are coaxially connected to form an upper roll portion 11. On the other hand, a side guide roll 3 having the same diameter and thickness as the side guide roll 3 of the upper roll portion is coaxially connected to one side of the guide roll 4 having the same diameter and thickness as the guide roll 4 of the upper roll portion. A side guide roll 3 having the same diameter and thickness as the side guide roll 3 is coaxially connected to the other side of the guide roll 4, and a thin plate of an upper roll portion is connected to the other side of the side guide roll 3. The thin-plate perforating disc-shaped rolls 1 having the same diameter, thickness, and perforating blade portion as the perforating disc-shaped rolls 1 are coaxially connected, and these coaxially connected roll groups constitute one set. A plurality of sets of the rolls are coaxially connected. Then, a plurality of sets of coaxially connected thin plate perforating discs 1 positioned at the end portions or, in some cases, a side guide roll 3 on one side of a guide roll 4.
The side guide rolls 3 having the same diameter and thickness as those described above are coaxially connected to form a lower roll portion 12. Then, the upper roll portion 11 and the lower roll portion 12 are fitted so that the disc-shaped rolls 1 for punching the thin plate of the upper roll portion 11 and the lower roll portion 12 face the guide roll 4, and pass through the thin plate 10. The perforated portion 20 that can be perforated is formed.

As shown in FIG. 6, the thin plate punching device of the present invention comprises a punching portion 20, a pair of upper and lower pinch rolls 6a and 6b which are tension applying means disposed in front of the punching portion 20, and a punching device. And a tension applying section 30 comprising a pair of upper and lower pinch rolls 7a and 7b, which are tension applying means disposed behind the section 20.

Further, as shown in FIG. 7, the guide roll 4 having a thickness slightly larger than the thickness of the disk of the disk-shaped roll 1 for thin plate punching is provided in the punching section 20 of the thin plate punching apparatus of the present invention. A concave portion 42 having the same cross-section as the cross-section of the drilling blade 2 is engraved at a position on the outer periphery opposite to the drilling blade 2 protruding from the thin plate drilling disc-shaped roll 1 to form a guide roll 4. And the upper roll 11 and the lower roll 12 are fitted so that the disc-shaped roll 1 for thin sheet perforation and the guide roll 4 are opposed to each other.
It may be. Further, the guide roll 4 is made of an elastic material such as rubber, and is not formed with a recess having the same cross section as the punching cross section as described above, but is formed into a disk having a flat outer peripheral surface. Blade 2 for punching provided on roll 1
Bites into the outer peripheral portion of the upper roll 12 and is elastically deformed. However, when the perforating blade 2 comes off the guide roll 4 after the perforation is completed, the shape is restored and the disk having the original flat outer peripheral surface is formed. The configuration may be such that

As described above, in the thin-sheet punching apparatus of the present invention, the thin-plate punching disc-shaped rolls 1 alternately contact both surfaces of the thin-plate 10, and the punching blades provided on the thin-sheet punching disc-shaped roll 1 are provided. Since the portion 2 alternately cuts from both sides of the thin plate 10 to form a cut and pierces, the punching or projection is inserted from only one side of the thin plate to pierce it. The flatness of the perforated thin plate having excellent flatness can be obtained without causing the flatness of the thin plate due to the occurrence of warpage or bending.

Next, a method for continuously drilling a large number of holes in a thin plate using the thin plate punching disk roll of the present invention and the thin plate punching apparatus of the present invention will be described. The case where the cross section of the hole is rectangular is described as an example. The present invention is a metal plate or metal foil having a thickness of about 0.02 to 0.2 mm, particularly an ultrathin metal foil of 0.1 mm or less,
It is intended to continuously drill a large number of holes in a plate or sheet such as resin or paper having a thickness of about 1 to several mm, and in the thin plate punching apparatus of the present invention, provided in front of the punching section 20. Pair of pinch rolls 6a as tension applying means
And 6b, and a pair of pinch rolls 7a and 7b, which are tension applying means provided behind the perforated section 20, constitute a tension applying section 30. The pinch rolls 6a and 6b, 7
A pair of upper and lower rolls 6a and 6b, and 7a and 7 forming the perforated portion 20 and the tension applying portion 30, respectively, in a state where a tension is applied between the thin plate 10 and the tension applying portion 30.
b, the lower roll 12 and the upper roll 11 constituting the perforated portion 20 are rotated while applying tension to the thin plate 10 to continuously pierce the thin plate 10. As shown in FIG. 8, a pair of upper and lower bridle rolls 16a and 16
b, and 17a, 17b may be used.

As described above, the thin plate 1 is kept under tension.
When 0 is brought into contact with the disc-shaped roll 1 for punching a thin plate, which is the upper roll 11 of the punching section 20, as shown in FIG.
First, the front edge 21 of the drilling blade 2 and a part of the side edge 23 extending from the front edge 21 bite into the thin plate 10 to form a cut.
When the disc-shaped roll 1 for thin sheet perforation is rotated, as shown in ii), a part of the side edge 23 extending from the front edge 21 of the perforation blade part 2 further cuts into the cut edge, and at the same time, the perforation blade part 2 is extended. The rear edge 22 and a part of the side edge 23 extending from the rear edge 22 cut into the thin plate 10 to form a cut. When the disc-shaped roll 1 for punching a thin plate is further rotated, as shown in iii), a part of the side edge 23 extending from the front edge 21 of the punching blade portion 2 further cuts into the cut edge, and at the same time, the punching blade portion is extended. A part of the side edge 23 extending from the rear edge 22 further cuts into the cut edge, and the cut of the side edge 23 extends from both sides of the front edge 21 and the rear edge 22. When the disc-shaped roll 1 for punching a thin plate is further rotated, the cuts of the side edges 23 extending from both sides of the front edge 21 and the rear edge 22 are connected as shown in iv), and a rectangular hole is formed in the thin plate 10. You. When the disc-shaped roll 1 for punching a thin plate is further rotated, the blade portion 2 for punching cuts into the thin plate 10 and a rectangular hole is formed in the same manner as described above. By rotating the thin plate-piercing disc-shaped roll 1 in this manner, rectangular holes can be continuously formed in the thin plate 10 at intervals. Further, as shown in FIG. 3, the leading edge 21 that first bites the thin plate 10 with the rotation of the disc-shaped roll 1 is projected lower than the rear edge 22 that bites the thin plate 10 later, so that the leading edge 21 and the rear edge It is also possible for the 22 to bite into the thin plate 10 at the same time.

When a rectangular hole is punched using the above-described thin plate punching disc-shaped roll 1, the blade portion of the side edge 23 connects the vertices of the blade portions of the front edge 21 and the rear edge 22. If the sheet 10 is engraved so as to protrude higher than the imaginary straight line 24 and not the leading edge 21 and the trailing edge 22 but the side edge 23 is cut into the thin plate 10 to form a cut, especially the thin plate 10 is 0.1.
mm or less, the rigidity of the thin plate is reduced, and the blades of the leading edge 21 and the trailing edge 22 are less likely to bite into the thin plate 10, which is accurate. Continuous drilling is impossible. FIG.
As shown in FIG. 5, the disk-shaped roll 1 for thin plate punching is formed by engraving such that the blade portion of the side edge 23 projects lower than the virtual straight line 24 connecting the vertices of the blade portions of the front edge 21 and the rear edge 22. Even in the case of using, when the drilling operation is performed without applying tension to the thin plate, especially when the metal plate 10 is made of an ultra-thin metal foil having a thickness of 0.1 mm or less or a thin resin film having low rigidity. In some cases, the rigidity of the thin plate is reduced, and the blades at the leading edge 21 and the trailing edge 22 are less likely to bite into the thin plate 10, making accurate continuous drilling impossible. Thus, 0.
When perforating an extremely thin metal foil having a thickness of 1 mm or less or a thin resin film having low rigidity, it is essential to apply tension to the thin plate.

In the thin-sheet punching apparatus of the present invention, as shown in FIG. 5, the thin-plate punching disk-shaped rolls 1 and the upper side guide rolls 3 are alternately and coaxially arranged to form an upper roll portion 11. The guide rolls 4 and the lower side guide rolls 5 are alternately and coaxially arranged and arranged.
The upper roll portion 11 and the lower roll portion 12 are fitted to each other, and a plurality of thin rectangular plates 10 can be formed with substantially rectangular holes continuously arranged in a line at intervals.
In this case, by mutually adjusting the pitch of the perforating blades 2 of the adjacent thin plate perforating disc-shaped rolls 1, it is possible to perform perforation in an arbitrary arrangement state such as perforation in a staggered manner or perforation in a lattice shape. It is possible.

The perforated thin plate having a large number of holes according to the present invention can be produced by using the above-described perforating apparatus provided with the above-described disc-shaped roll for perforating a thin plate and the above-described perforating method. The perforated thin plate having a large number of holes according to the present invention can be applied not only to a metal plate but also to a thin plate or a sheet such as resin or paper, and in particular, the thin plate is made of an ultrathin metal foil having a thickness of 0.1 mm or less. In some cases, uniform and uniform holes are continuously and accurately drilled, and there are no protruding portions such as folded portions, so that a suitable perforated metal plate for a secondary battery electrode base is obtained.

When a perforated metal plate or a perforated metal foil is prepared for the secondary battery electrode substrate as described above, it is necessary to adhere as much active material as possible to the substrate and to produce a sufficient anchor effect. The opening ratio, which is the ratio of the area of the perforated portion to the entire area of the metal plate or metal foil, is preferably at least 30% or more, and more preferably 40% or more. By using the thin plate punch of the present invention, a metal plate or a metal foil having such a high aperture ratio can be produced at an extremely high speed.

(Example) An alloy tool steel (SK) having a thickness of 1 mm
On the outer peripheral surface of the 80 mm diameter disk made of S1), 75 piercing blades having a rectangular piercing section with a length of 1.5 mm in the circumferential direction and a width of 1 mm are spaced apart by 0.6 mm and 75 radii. Thirty sets of disk-shaped rolls for thin plate punching that were engraved so as to protrude in the direction were prepared. The blades for punching have a rectangular front edge and a rear edge protruding at two places in the thickness direction of the disc-shaped roll, and have a blade height (maximum height) of 1 mm, and project at two places on the left and right sides in the circumferential direction. The height (minimum height) of the center of the side edge to be set is 0.5 mm,
From the center of the leading edge to the side edge to the trailing edge, the blade height was projected so as to continuously change in an arc shape.

In addition, a 0.7 mm thick alloy tool steel (SK
Thirty-one sets of disc-shaped rolls having a diameter of 80 mm and comprising S1) were prepared as upper side guide rolls. Then, both ends become side guide rolls, and a spacer is inserted and adjusted so that the distance between the side guide rolls and the disc-shaped roll for thin plate punching becomes 0.05 mm, and the disc-shaped rolls for the thin plate punching and the side rolls are adjusted. Guide rolls were alternately and concentrically arranged to form an upper roll portion. On the other hand, 30 sets of disk-shaped rolls having a diameter of 80 mm and made of alloy tool steel (SKS1) having a thickness of 1 mm were prepared as guide rolls. Also, plate thickness
Diameter 81 made of 0.7 mm alloy tool steel (SKS1)
A set of 31 mm-shaped disc-shaped rolls was formed as lower side guide rolls, and guide rolls and side guide rolls were alternately and concentrically arranged so that both ends became side guide rolls, thereby forming a lower roll portion. Was.

The upper roll portion and the lower roll portion thus formed were fitted to each other to form a perforated portion. In addition, the intervals of the perforation blades of the adjacent upper rolls were arranged so as to be shifted by a half pitch in the circumferential direction so that the arrangement of perforated holes was staggered. Further, as shown in FIG. 8, a pair of thin rolls is formed in front of and behind the perforated portion in such a manner that the thin plate is wound along a part of the outer periphery of the lower roll portion of the perforated portion, and a pair of thin plates is formed. A bridging roll is provided to form a tension applying section, and the rotation speed of the front bridging roll is set slightly higher than the rotating speed of the rear bridging roll, so that tension is always applied to the metal plate between the bridging rolls. Structure. Thus, a thin plate punch was constructed.

Next, a nickel-plated long strip-shaped nickel-plated steel foil having a thickness of 0.035 mm and a width of 54.8 mm was punched by using the above-mentioned thin plate punch. The rotation speeds of the bridle roll in front of the tension applying section, the bridle roll behind, and the upper and lower roll sections of the perforated section were set so that the steel foil advances at a speed of 20 cm / sec. The rotation speed of each bridle roll was set such that a tension of 2 kg acts on the steel foil between the front bridle roll and the rear bridle roll. In this way, a rectangular hole having a length of 1.5 mm and a width of 1 mm is 0.6 mm in the length direction.
And 30 rows in a zigzag pattern at 0.45 mm intervals in the width direction to obtain a perforated nickel-plated steel foil having an opening of about 40%.

[0025]

According to the present invention, a disk-shaped roll for punching a thin plate formed by engraving a plurality of blades for punching on the outer periphery of the disk-shaped roll in the radial direction is provided in the width direction of the thin plate to be punched. In order to alternately contact the upper and lower surfaces of the thin plate, a plurality of upper rolls and lower rolls are alternately provided, and a thin plate punching device that abuts the blade portion for punching simultaneously from the upper and lower surfaces of the thin plate and a thin plate punching device. It is a thin plate punching method used, and by using the thin plate punching device and the thin plate punching method of the present invention, a long strip-shaped thin plate, particularly an ultrathin metal foil used for a secondary battery electrode base, has a uniform thickness and an excellent thickness. While having flatness, it has become possible to continuously drill many uniform holes.

[Brief description of the drawings]

FIG. 1 is a schematic view showing an example of a state in which a metal plate is perforated by using a disk-shaped roll for perforating a metal plate of the present invention.

FIG. 2 is a perspective view showing an example of a shape of a punching blade portion formed by protruding and engraving on the outer periphery of a disc-shaped roll for metal plate punching of the present invention.

FIG. 3 is a schematic view showing another example of a state in which a metal plate is punched using the metal plate punching disk-shaped roll of the present invention.

FIG. 4 is a schematic diagram showing a perforation mode of a metal plate when a metal plate is perforated using the disc-shaped roll for perforating a metal plate of the present invention.

FIG. 5 is a schematic view showing another example of the metal plate punching device of the present invention.

FIG. 6 is a schematic view showing an example of the metal plate punching device of the present invention.

FIG. 7 is a schematic view showing another example of the perforated portion of the metal plate perforating apparatus of the present invention.

FIG. 8 is a schematic view showing another example of the metal plate punching device of the present invention.

[Explanation of symbols]

 1: disc-shaped roll for perforating metal plate 2: blade for perforation 3: upper side guide roll 4: guide roll 5: lower side guide roll 6a, 6b, 7a, 7b: pinch roll 10: metal plate 11: upper Roll portion 12: Lower roll portion 13: Spacer 16 a, 16 b, 17 a, 17 b: Bridle roll 20: Perforated portion 21: Front edge (the portion of the blade projecting in the circumferential direction) 22: Rear edge (projected in the circumferential direction) Blade part) 23: Side edge (the blade part protruding in the axial direction) 24: Virtual line 30: Tension applying part 42: Concave part

Claims (9)

[Claims] 1. An apparatus for piercing a plurality of holes in a thin plate or thin foil, comprising a plurality of piercing blades spaced circumferentially on a peripheral surface of a disk-shaped roll having a constant thickness. A disc-shaped roll for sheet punching that is engraved so as to protrude in the radial direction, and coaxially connected to one side of the disc-shaped roll for sheet punching, and a center of the disc-shaped roll for sheet punching. A disk-shaped side guide roll having a radius smaller than the length of the blade of the drilling blade portion by at least the thickness of the thin plate, and coaxial with another side of the disk-shaped roll for thin punching. A side guide roll having the same diameter and thickness as the side guide roll, and a coaxially connected to the other side of the side guide roll, the disc-shaped roll for thin plate punching Having a thickness slightly greater than the thickness of the disc of A set of rolls, each having a diameter smaller than the diameter of the side guide rolls and a disc-shaped guide roll having the same diameter and thickness as a guide roll of a lower roll described later, The side guide rolls having the same diameter and thickness as the side guide rolls are coaxially connected to one side of the guide roll or the disc-shaped roll for thin plate punching located at the outermost end to form an upper roll portion. A guide roll having the same diameter and thickness as the guide roll; a side guide roll coaxially connected to one side of the guide roll and having the same diameter and thickness as the side guide roll; Coaxially connected to the other side of the guide roll,
A side guide roll having the same diameter and thickness as the side guide roll, coaxially connected to the other side of the side guide roll, and having the same diameter and thickness as the thin plate punching disc-shaped roll. And a plurality of sets of rolls each comprising a thin plate punching disc-shaped roll having a punching blade portion, and one set of thin plate punching disc-shaped rolls or guide rolls located at the extreme end. A side guide roll having the same diameter and thickness as the side guide roll is coaxially connected to form a lower roll portion, and the upper roll portion and the lower roll portion each have a disc-shaped roll for thin plate punching. The upper roll portion and the lower roll portion are fitted so that the guide rolls face each other, and a perforation portion that can be perforated while passing through the thin plate is formed. Distribution contact with becomes thin punching device each tensioning unit comprising a tension applying means for applying a force. 2. The thin plate punching device according to claim 1, wherein a shape of a cross section of the punching blade portion is a rectangle or a substantially rectangular shape with rounded squares. 3. The drilling blade according to claim 1, wherein a shape of a cross section of the drilling blade portion is changed to a substantially rectangular shape, and is an ellipse, an ellipse, a perfect circle, a rhombus, or a substantially rhombus with a rounded square. Sheet drilling equipment. 4. The thin plate punching apparatus according to claim 1, wherein said tension applying means comprises a pair of upper and lower pinch rolls sandwiching said thin plate. 5. The thin plate punch according to claim 1, wherein the tension applying means comprises a pair of upper and lower bridle rolls. 6. A thin plate punching method for punching the thin plate using the thin plate punching device according to any one of claims 1 to 5, wherein a pair of tension applying members respectively disposed in front and rear of the punched portion. The rolls forming the perforated portion are rotated while applying the tension to the thin plate by the tension applying means constituting the tension applying portion, and the thin plate is continuously punched. A method for punching a thin plate, comprising: 7. A perforated thin plate manufactured using the thin plate perforating apparatus according to claim 1 and the thin plate perforating method according to claim 6. 8. The perforated thin plate according to claim 7, wherein the thin plate is a metal plate or a metal foil. 9. The perforated thin plate according to claim 8, wherein the thin plate is a metal plate or a metal foil having an aperture ratio of 30% or more.