JP2001357856A - Stereoscopic porous metal foil, machining method for it and its machining device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a machining method capable of easily bending metal foil having multiple hole parts formed by applying simple machining and of simply machining a material into the metal foil capable of being easily bent like this. SOLUTION: The metal foil 1 has discontinuous cut lines 4 formed according to a predetermined bending radius and the multiple hole parts 3 drilled so as not to overlap the discontinuous cut lines 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technique for producing an electrode material by applying a chemical substance to a metal foil having a large number of holes, and more particularly to a processing method for easily bending the metal foil. TECHNICAL FIELD The present invention relates to a three-dimensional porous metal foil that can be used, a method of processing the metal foil, and a processing apparatus therefor.

[0002]

2. Description of the Related Art Conventionally, a large number of holes are provided in electrode plates of nickel hydride batteries, nickel cadmium batteries, lithium batteries, alkaline dry batteries, fuel cells and the like, and various batteries such as automobile batteries. Metal foil is used. Various methods for producing a metal foil having such a hole have been proposed as described below. For example,
A coated electrode for a battery in which a hole is formed in a metal foil and a method for manufacturing the same have been proposed (see JP-A-7-335208). This coated electrode for a battery and the manufacturing method are shown in FIG.
As shown in (a), (b) and (c), the metal sheet material S
In this method, a large number of holes 3 are pierced by the hole punching device 2 from one side or both sides to form a metal foil 1 having a large number of holes 3.

Further, a method of manufacturing a lath net is that a shear portion corresponding to a strand length is equally arranged in an outer peripheral direction of a rotary blade, and the shear portions are arranged in a staggered manner in an axial direction to form a metal foil. A method for manufacturing a metal lath by making a cut and then extending the cut in a direction perpendicular to the cut (see JP-A-58-23166).
Reference).

[0004] The metal foil 1 or the lath net provided with such a large number of holes 3 is further passed through a rolling mill and a sintering furnace and then wound up by a winding device. Thereafter, the metal foil or the like is cut into an appropriate size by a cutting device or the like, and used as an electrode plate. Using this metal foil or the like as a core material, a mixture of a hydrogen storage alloy and an organic binder or the like is applied to both surfaces thereof to form an electrode plate.

[0005]

However, the metal foil 1 or lath net manufactured as described above has a shape in which the holes 3 are uniformly formed when the metal foil 1 or the like is bent when used as an electrode material. May be deformed, or the holes 3 may be cracked, and the cracked portions may become projections. The electrode material processed by applying a chemical substance to such a metal foil 1 may have projections and the like, which has a problem of causing insulation failure.

[0006] Further, if the projections or the like come out of the electrode material as described above, they may be entangled with other battery materials, and there is a problem that the handling becomes difficult.

The present invention has been made to solve such a problem. That is, an object of the present invention is to easily bend a metal foil provided with a large number of holes by performing a simple processing, and thus to easily obtain a metal foil which can be easily bent. An object of the present invention is to provide a three-dimensional porous metal foil that can be processed into a metal foil, a method for processing the metal foil, and a processing apparatus therefor.

[0008]

According to the three-dimensional porous metal foil of the present invention, the metal foil (1) has a discontinuous cut line (4) formed according to a predetermined bending radius, and the discontinuous cut line (4). And (3) a large number of holes (3) opened so as not to hit (4).

The discontinuous cut lines (4) can be arranged in parallel with each other so as to sandwich one or more rows of the holes (3). Further, the discontinuous cut lines (4) can be arranged so as to cross each other.
Further, the hole (3) can be formed in a polygonal shape.

Since the three-dimensional porous metal foil has a discontinuous cut line (4) which becomes a bending line on the entire surface or a part thereof, the discontinuous cut line (4) can be easily formed at the time of manufacturing the electrode material. Can be folded. In this way, the bent three-dimensional porous metal foil is less likely to lose its shape. Further, since the discontinuous cut line (4) serves as a stress relief at the bent portion, the hole (3) is not cracked, and a chemical substance is applied to the porous metal foil and processed to form an electrode material. Even so, there is no possibility that protrusions or the like appear and insulation failure occurs.

Further, the discontinuous cut line (4) serving as a bending line of the metal foil (1) is formed so as to sandwich one row or a plurality of rows of holes (3) parallel to each other. The bending angle in (1) can be freely changed. Further, by arranging the discontinuous cut lines (4) so as to intersect or forming the holes (3) in a polygonal shape, the metal foil (1) can correspond to various bent shapes. it can.

According to the processing method of the present invention, in the method for processing a porous metal foil for forming a hole portion (3) in a metal sheet material (S), a discontinuous cut line is formed in the metal sheet material (S). (4) is formed according to a predetermined bending radius, and then a hole (3) is opened so as not to hit the discontinuous cut line (4). A method is provided.

Conversely, a hole (3) is opened in the metal sheet material (S), and then a discontinuous cut line (4) is formed in the metal sheet material (S) according to a predetermined bending radius. Can be formed. Or, the metal sheet material (S)
In addition, when the hole (3) is opened, the discontinuous cut line (4) can be formed at the same time according to a predetermined bending radius. The arrangement intervals of the discontinuous cut lines (4) can be formed while being variable.

According to the processing method described above, the discontinuous cut line (4) can be easily processed from the metal sheet material (S) having the holes (3). This metal sheet material (S)
By cutting into a rectangular shape, a three-dimensional porous metal foil can be easily and quickly manufactured.

According to the processing apparatus of the present invention, a cut line processing apparatus (11) for forming a discontinuous cut line (4) in a metal sheet material (S) according to a predetermined bending radius.
And a perforation processing device (5) for perforating a hole (3) so as not to hit the discontinuous cut line (4), and the metal sheet material (S) is formed on a metal foil (1) having a predetermined length. And a cutting device for cutting the three-dimensional porous metal foil.

Conversely, a perforation processing device (5) for perforating a hole (3) in a metal sheet material (S), and a discontinuous cut line (4) so as not to hit the hole (3). And a cutting device that cuts the metal sheet material (S) into a metal foil (1) having a predetermined length.

Further, a cut line processing device (11) that forms a discontinuous cut line (4) in accordance with a predetermined bending radius simultaneously with the drilling of the hole punching device (5) can be employed.

The cut line processing device (11) can employ either a hole drilling type or a rotary tooth type processing device.

In the processing apparatus according to the present invention, the holes (3) can be formed in the metal sheet material (S) by the pair of upper and lower holes processing apparatuses (5). With the cut line processing device (11), a discontinuous cut line (4) can be formed in the metal sheet material (S). In addition, the metal sheet material (S) is continuously processed by the hole punching device (5) and the cut line processing device (11), so that the discontinuous cut line (4) is prevented from hitting the hole (3). ) Can be formed,
Alternatively, the hole (3) can be opened so as not to hit the discontinuous cut line (4).

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common members are denoted by the same reference numerals, and duplicate description is omitted. FIG. 1 is a plan view showing an embodiment of the three-dimensional porous metal foil of the present invention. FIG. 2 shows a three-dimensional porous metal foil,
(A) is a sectional side view, and (b) is an enlarged sectional side view of the same. The three-dimensional porous metal foil of the present invention includes a discontinuous cut line 4 formed on the entire surface or a part of the metal foil 1 in accordance with a predetermined bending radius, and a large number of non-continuous cut lines 4 opened so as not to hit the discontinuous cut line 4. And a hole 3.

The metal foil 1 is coated with a mixture of a hydrogen storage alloy and an organic binder as a core material on both sides to form an electrode plate. The large number of holes 3 of the metal foil 1 are portions having an effect of increasing the adhesion of these mixtures and the like.

The discontinuous cut line 4 formed on the entire surface of the metal foil 1 is a portion to be a folding line when the metal foil 1 is bent. The discontinuous cut lines 4 are formed in accordance with a predetermined bending radius. For example, when the bending radius is long and the curve is to be gently bent, the interval between the discontinuous cut lines 4 parallel to each other is increased, and When the radius is short and the bend is small, the interval between the discontinuous cut lines 4 parallel to each other is reduced. The shape of the perforated metal foil that is bent and made three-dimensional in this way is less likely to collapse. In addition, since the discontinuous cut line 4 serves as a stress relief at the bent portion, it does not break in the hole portion 3 and the porous metal foil is coated with a chemical substance and processed into an electrode material. Insulation failure due to protrusions and the like does not occur.

The plan view of the porous metal foil shown in FIG. 1 shows an example in which linear discontinuous cut lines 4 are arranged so as to sandwich two parallel holes 3. The row of the discontinuous cut lines 4 is not limited to the configuration formed so as to sandwich the two parallel rows of holes 3 in this manner. For example, it can be formed so as to sandwich one or three or more rows of holes 3 parallel to each other. The number of rows of the holes 3 is
It is determined according to the bending angle of the metal foil 1, the diameter of the hole 3, and the adjacent distance of the hole 3. It is also possible to form the discontinuous cut lines 4 while changing the arrangement interval.

FIG. 3 is an enlarged sectional view showing the structure of the boring apparatus. As shown in the figure, the boring device 5
A set of a punch 6 and a die 7 for opening the circular hole 3 is a press working device in which the upper die 8 and the lower die 9 are alternately arranged. By pressing the punch 6 and the die 7,
Many circular holes 3 can be opened from both upper and lower surfaces of the metal foil 1. However, without limiting to such a configuration, it is of course possible to arrange only the punch 6 in the general upper die 8 and only the die 7 in the lower die 9 to open the hole 3 from top to bottom. It is.

FIG. 4 is an enlarged explanatory view showing a positional relationship between a hole and a discontinuous cut line in the three-dimensional porous metal foil of the present invention. The discontinuous cut line 4 is formed by discontinuously forming a large number of slits 4a as shown in the figure by using a press working device combining a punch and a die, similarly to the above-described punching device 5 for the hole portion 3. It is a thing. Since the large number of slits 4 a function as bending lines, their opening areas need to be smaller than the holes 3.

The discontinuous cut line 4 is formed by arranging rotating blades (not shown) in a staggered manner in the circumferential direction and the axial direction, and by a plurality of shearing blades arranged in a line in the axial direction at a constant pitch. Intermittent shearing can be performed to form a large number of discontinuous slits. In this way, the processing of the discontinuous cut line 4 can be easily performed only by simply rotating the rotary blade and shearing the metal sheet with the linear fixed blade.

FIG. 5 is a plan view showing another embodiment of the three-dimensional porous metal foil arranged so as to intersect the discontinuous cut lines. The discontinuous cut lines 4 serving as bending lines of the metal foil 1 do not need to be arranged in parallel to each other as described above, and can be formed so as to surround the two holes 3 in a lattice shape. By arranging the discontinuous cut lines 4 so as to intersect, the degree of freedom in the bending direction of the metal foil 1 can be increased.

FIG. 6 is a plan view showing another embodiment of a three-dimensional porous metal foil in which discontinuous cut lines are arranged so as to intersect holes formed in a polygonal shape. It is not necessary to insert two circular holes 3 in the discontinuous cut lines 4 arranged in a lattice. For example, it is possible to arrange four square holes 3 as shown in the figure. Further, the number of holes 3 surrounded by the discontinuous cut line 4 is not limited to four. That is, the metal foil 1
The optimum number can be selected according to the bending shape of.

FIG. 7 is a plan view showing another embodiment of the three-dimensional porous metal foil arranged so that discontinuous cut lines intersect. The discontinuous cut lines 4 arranged so as to cross each other need not necessarily be arranged in a lattice shape, but may be arranged in a diamond shape as shown in the figure. Furthermore, it is also possible to arrange four diamond-shaped holes 3 in the inside.

FIG. 8 is a plan view showing another embodiment of a three-dimensional porous metal foil in which discontinuous cut lines are arranged so as to intersect holes formed in a polygonal shape. Further, the discontinuous cut lines 4 arranged so as to intersect need not necessarily be arranged in a lattice shape, but may be arranged in a triangular shape so as to intersect from three directions as shown in the figure. Furthermore, it is also possible to arrange four triangular holes 3 inside these discontinuous cut lines 4.

FIGS. 9A and 9B show a method and an apparatus for processing a three-dimensional porous metal foil according to the present invention. FIG. 9A is an explanatory view showing a cut line processing apparatus and a perforation processing apparatus, and FIG.
FIG. 3 is an explanatory view of a state in which a discontinuous cut line is formed in a metal foil, and FIG. 3C is an explanatory view of a state in which a hole is opened so as not to hit the discontinuous cut line. First, the metal sheet material S wound around the coiler 10 is formed by the press-cutting cut line processing apparatus 11 for punching into a discontinuous cut line 4 for bending according to a predetermined bending radius (FIG. 9 ( a)). At this time, discontinuous cut lines 4 arranged in a triangular shape are formed on the entire surface of the metal sheet material S so as to intersect from three directions (see FIG. 9B). Note that, depending on the arrangement of the discontinuous cut lines 4, it is possible to employ a rotary tooth system instead of the cut line processing device 11 of the perforated system.

The metal sheet material S having the discontinuous cut lines 4 formed as described above is conveyed to the next perforating apparatus 5 where the holes 3 are formed. At the time of drilling by the drilling device 5, the hole 3 is opened so as not to hit the discontinuous cut line 4 (see FIG. 9C). Finally, the metal sheet material S is wound around the winding coiler 12 as a three-dimensional porous metal foil. Alternatively, the metal sheet material S can be cut into a metal foil 1 having a predetermined length by a cutting device (not shown) without winding the metal sheet material S around the winding coiler 12.

Conversely, the order of the cut line processing device 11 and the hole processing device 5 can be reversed. Further, when the holes 3 are formed on the entire surface of the metal foil 1, the discontinuous cut lines 4 can be formed at the same time.

The present invention is not limited to the above-described embodiment of the present invention. For example, the discontinuous cut line 4 does not need to be formed in a straight line, but may be formed in a curved shape. Also, the slit 4a of the discontinuous cut line 4
It is not necessary to necessarily have the same dimensions and sizes, and slits having different lengths may be alternately arranged, and the present invention is not limited to the above-described embodiment of the invention, and may be variously modified without departing from the gist of the invention. Of course, it can be changed.

[0035]

As described above, the three-dimensional porous metal foil of the present invention has a discontinuous cut line which is a bending line on the entire surface or a part thereof. And can be easily folded. In particular, since the discontinuous cut line serves as a stress relief at the bent portion, it does not crack at the hole as in the conventional case, and even if a chemical substance is applied to this porous metal foil and processed into an electrode material. Also, there is no possibility that protrusions or the like appear and insulation failure occurs.

Further, the method and apparatus for processing a three-dimensional porous metal foil of the present invention can easily form a discontinuous cut line while opening a hole from a metal sheet material. By cutting and bending this metal foil into a rectangle, a three-dimensional porous metal foil can be easily and quickly manufactured.

Further, the processing steps are extremely simplified.
There are excellent effects such as reduction of equipment cost and operation cost and reduction of overall processing cost.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a three-dimensional porous metal foil of the present invention.

FIG. 2 shows an embodiment of a three-dimensional porous metal foil, in which (a) is a side sectional view and (b) is an enlarged side sectional view.

FIG. 3 is an enlarged sectional view showing a structure of a hole making apparatus.

FIG. 4 is an enlarged explanatory view showing a positional relationship between a hole and a discontinuous cut line in the three-dimensional porous metal foil of the present invention.

FIG. 5 is a plan view showing another embodiment of the three-dimensional porous metal foil arranged so that discontinuous cut lines intersect.

FIG. 6 is a plan view showing another embodiment of a three-dimensional porous metal foil in which discontinuous cut lines are arranged so as to intersect holes formed in a polygonal shape.

FIG. 7 is a plan view showing another embodiment of the three-dimensional porous metal foil arranged so that discontinuous cut lines cross each other.

FIG. 8 is a plan view showing another embodiment of the three-dimensional porous metal foil in which discontinuous cut lines are arranged so as to intersect holes formed in a polygonal shape.

9A and 9B show a method and an apparatus for processing a three-dimensional porous metal foil of the present invention, wherein FIG. 9A is an explanatory view showing a cut line processing apparatus and a hole punching apparatus, and FIG. FIG. 3C is an explanatory view of a state in which a continuous cut line is formed, and FIG. 4C is an explanatory view of a state in which a hole is opened so as not to hit a discontinuous cut line.

FIG. 10 shows a conventional porous metal foil and a processing device therefor, wherein (a) is a plan view showing the porous metal foil, and (b)
FIG. 3 is an explanatory cross-sectional view showing a state in which a hole is opened, and FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Metal foil 3 Hole part 4 Discontinuous cut line 4a Slit 5 Drilling device 6 Punch 7 Die 8 Upper die 9 Lower die 10 Coirer 11 Cut line processing device 12 Winding coiler S Metal sheet material

Claims (14)

[Claims] 1. A discontinuous cut line (4) formed in a metal foil (1) according to a predetermined bending radius, and a large number of holes formed so as not to hit the discontinuous cut line (4). (3) A three-dimensional porous metal foil characterized by having: 2. The three-dimensional porous metal according to claim 1, wherein the discontinuous cut lines (4) are arranged parallel to each other so as to sandwich a row of the holes (3). Foil. 3. The three-dimensional porous metal according to claim 1, wherein the discontinuous cut lines (4) are arranged parallel to each other so as to sandwich a plurality of rows of the holes (3). Foil. 4. The three-dimensional porous metal foil according to claim 1, wherein the discontinuous cut lines (4) are arranged so as to cross each other. 5. The three-dimensional porous metal foil according to claim 1, wherein the holes (3) are formed in a polygonal shape. 6. A method for processing a porous metal foil in which a hole (3) is formed in a metal sheet material (S), wherein a discontinuous cut line (4) is bent in the metal sheet material (S) by a predetermined amount. Forming according to the radius, and then opening a hole (3) so as not to hit the discontinuous cut line (4);
A method for processing a three-dimensional porous metal foil, comprising: 7. A method for processing a porous metal foil in which a hole (3) is formed in a metal sheet material (S), wherein a hole (3) is opened in the metal sheet material (S). A method of processing a three-dimensional porous metal foil, wherein a discontinuous cut line (4) is formed in the metal sheet material (S) according to a predetermined bending radius. 8. A method for processing a porous metal foil in which a hole (3) is formed in a metal sheet material (S), wherein the hole (3) is opened in the metal sheet material (S). At the same time, the discontinuous cut line (4) is formed according to a predetermined bending radius. 9. The method for processing a three-dimensional porous metal foil according to claim 6, wherein the intervals at which the discontinuous cut lines (4) are arranged are varied. 10. A cut line processing device (11) for forming a discontinuous cut line (4) on a metal sheet material (S) according to a predetermined bending radius, and does not hit the discontinuous cut line (4). And a cutting device for cutting the metal sheet material (S) into a metal foil (1) having a predetermined length.
A three-dimensional porous metal foil processing apparatus characterized by the following features. 11. A hole (3) in a metal sheet material (S).
And a cut line processing device (1) for forming a discontinuous cut line (4) according to a predetermined bending radius so as not to hit the hole (3).
1) and a cutting device for cutting the metal sheet material (S) into a metal foil (1) having a predetermined length. 12. A hole (3) in a metal sheet material (S).
And a cut line processing device (11) for forming a discontinuous cut line (4) according to a predetermined bending radius at the same time as drilling of the hole processing device (5). A cutting device for cutting the metal sheet material (S) into a metal foil (1) having a predetermined length. 13. The cut line processing device (11).
13. A three-dimensional porous metal foil processing apparatus according to claim 10, 11 or 12. 14. The cutting line processing device (11).
13. The apparatus for processing a three-dimensional porous metal foil according to claim 10, 11 or 12, wherein the apparatus is a rotary tooth type processing apparatus.