JPH0379295A - Cutting device and manufacture of flat coil used therein - Google Patents

Abstract

PURPOSE:To cut a metal wire without generating a burr on a cutting face, by biting a cutting edge and receiving edge each other so that one side face of the cutting edge and receiving edge thereof is abutted. CONSTITUTION:Cutting edges 3, 4 having a pair of cut edges are provided at equal intervals on one part of the rotating shaft 1 of a pair of rotating shafts 1, 2 arranged nearly in parallel with their opposition each other and cylindrical receiving edges 5, 6, 7 are provided at equal intervals on the other part of the rotating shaft 2. The cutting edges 3, 4 are bitten so as to bring the one side faces 5b, 6a, 6b and 7a of the receiving edges 5, 6, 7 and the cut edges of the cutting edges 3, 4 respectively into contact between adjacent receiving edges 5, 6 7. A metal foil is therefore cut at equal intervals simultaneously between the receiving edges and among cutting edges. In this case, a cutting force is applied in one direction respectively at the part opposed to the receiving edge and that opposed to the cutting edge, so that the generation of stress is constrained and the burrs generated on the cutting face are reduced.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a cutting device for cutting a wide metal foil into metal wires of a predetermined width, and further relates to a method for manufacturing a flat coil using this cutting device. It is about the method.

[Summary of the invention]

The present invention provides a cutting device for cutting a wide metal foil into a metal wire of a predetermined width, in which a cutting blade and a receiver are provided on each of a pair of rotating shafts that are arranged facing each other in substantially parallel. By arranging the cutting blade so that the cutting edge of the cutting blade and one side of the receiving blade are in mesh with each other so that they are in contact with each other, cutting is attempted to be performed without causing any splintering.

Furthermore, the present invention provides a method for manufacturing a flat coil formed by winding and laminating metal wires cut to a predetermined width. The aim is to manufacture

[Conventional technology]

Traditionally, motor coils have generally been wound with insulated round metal wires or relatively thick flat metal wires, but as electronic devices become smaller and lighter,
As performance improves, thin so-called flat coils have been developed and put into practical use.

For example, as a coil for a flat motor, a sheet coil is used, which is formed by etching a copper foil laminated to an insulating sheet in a spiral shape with a line width of about 50 μm. On the other hand, a flat coil is used, which is produced by applying an adhesive, an insulating film, etc. to a wide copper foil, winding it up, and then slicing the wound body into rounds to a predetermined thickness.

However, in the above-mentioned sheet coil, since the conductor pattern needs to be produced by etching, there is a problem that it requires a complicated process and cannot be easily produced.

On the other hand, flat coils produced by cutting into rings not only are not easy to cut, but also have problems such as low yield because they require a cutting allowance, and moreover, they tend to have burrs on the cut surfaces.

Therefore, we believe that the above-mentioned problem can be solved by cutting a wide rolled metal foil into a predetermined coil width to make a metal wire with a substantially rectangular cross section, and then winding this to create a flat coil. It will be done.

In other words, this flat coil is manufactured by simply winding a metal wire that has been cut to a predetermined coil width, so there is no need to go through the complicated processes that are required for the sheet coils, etc. It is advantageous in that there is no need to cut it after winding. Furthermore, this type of flat coil has a higher conductor occupation rate than the above-mentioned wire-wound coils, sheet coils, etc., and is therefore expected to achieve high output.

[Problem to be solved by the invention]

By the way, in order to cut the above-mentioned wide metal foil, it is sufficient to use a cutting device in which a plurality of disc-shaped cutting blades are arranged side by side on a rotating shaft, and to rotate the cutting blades. it is conceivable that.

However, when cutting with this cutting device, a problem arises in that burrs occur on the cut surface of the metal wire. The above-mentioned wire not only causes irregularities in the winding of the metal wire, but also makes the mounting of external devices etc. on the wiring board unstable, and deteriorates the reliability of the electrical connection to the wiring pattern. invite

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a cutting device that can cut a metal wire without causing any cracks on the cut surface.

A further object of the present invention is to provide a method for manufacturing a highly reliable flat coil with high conductor occupancy without winding disorder.

[Means to solve the problem]

The cutting device of the present invention has been proposed to achieve the above-mentioned object, and has a pair of rotating shafts arranged substantially parallel to each other, and one rotating shaft has a pair of rotating shafts arranged substantially parallel to each other. Cutting blades each having a cutting edge are provided at equal intervals, and cylindrical receiving blades are provided at equal intervals on the other rotating shaft, and one side of the cutting blade and the receiving blade are arranged at equal intervals. Furthermore, the manufacturing method of the flat coil of the present invention includes cutting a wide metal foil into a metal wire of a predetermined width using the cutting device of the present invention, and then winding the metal wire. It is characterized by:

[Effect]

In the cutting device of the present invention, cutting blades each having a pair of cutting blades are provided at equal intervals on one of the pair of rotating shafts that are arranged substantially parallel to each other, and the cutting blades having a pair of cutting blades are provided at equal intervals on one rotating shaft. The driving shaft is provided with cylindrical receiving blades at equal intervals, and the cutting blades are meshed between adjacent receiving blades so that the cutting edge of the cutting blade and one side of the receiving blade are in contact with each other. , the gold i-foil is simultaneously cut at equal intervals between the receiving blades and between the cutting blades. Also, at this time, the cutting force is applied in one direction on the part facing the receiving blade and the part facing the cutting blade (however, the directions in which the cutting force is applied are opposite to each other on the part facing the receiving blade and the part facing the cutting blade). ), the generation of stress is suppressed and the number of cracks generated on the cut surface is reduced.

Furthermore, in the method of the present invention, since a metal wire with a substantially rectangular cross section and no burrs is wound around the cut surface cut by the cutting device of the present invention, a flat coil with uniform end surfaces without winding irregularities can be obtained. .

〔Example〕

Hereinafter, specific examples of a cutting device to which the present invention is applied and a method of manufacturing a flat coil using the same will be described.

First, the cutting device of this embodiment will be explained.

As shown in FIGS. 1 and 2, the cutting device of this embodiment has a pair of rotating shafts (1
), (2), the cutting blades (3), (4) attached to the rotating shafts (1), (2), respectively, and the receiving blade (5).
, (6).

(7).

The cutting blades (3) and (4) are, for example, thin disc-shaped cutting parts (8), (11), (12).
, (15) and the reinforcement part (9) that reinforces this, (
10), (13), (14) Cutting blade block (16), (17), (1B), (
19) are matched one by one.
That is, one cutting blade (3) is formed by a pair of cutting blade blocks (16), (17) butted against each other, and the other cutting blade (4) is formed by a pair of cutting blade blocks (1B), (
19) are butted together.

The above cutting parts (8), (11), (12),
(15) and reinforcement parts (9) and (10) that reinforce this
, (13), and (14) are integrally machined using, for example, high-speed tool steel (High Speed Steel 11), etc., to reinforce the outer diameters of the cut portions (8), (11), (12), and (15). Parts (9) (10), (13), (1
4> is larger than the outer diameter. The above cutting part (8),
Among the axial sides of (11), (12), and (15), receiving blades (5), (6), and (7), which will be described later,
) side surface (8a) in contact with.

The outer peripheral edges of (lla), (12a), and (15a) serve as cutting edges. Therefore, these pairs of cutting blade blocks (16), (17
) and a pair of cutting blade blocks (18) and (19), the cutting blades (3) and (4) are so-called two-blade type cutting blades having cutting blades on both sides. In addition, the axial width of the cutting blades (3) and (4), that is, the distance between both side surfaces (8a) and (lla) of the pair of cutting blade blocks (16) and (17), is determined by the width of the cutting blades (3) and (4). The width is set to W. Therefore, the above cutting blade blocks (16), (17), (18), (
19) have the same shape and dimensions, so these cutting blade blocks (16), (17), (
The axial widths of 18) and (19) are W/2 of the cutting width W, respectively.

In this embodiment, the cutting blades (3) and (4) are
Use KH51 (JIS G 4403) and its cutting blade (3).

Cutting parts (8) , (11) , (
12) The diameter of (15) was set to 90 +++ m. In addition, the reinforcement parts (9), (10), (13)
.

The axial width W1 of (14) is 0.1 IIIm, and the cut portion (8).

The axial width W of (11), (12), and (15)! was set as W/2-0.1 cylinder. Furthermore, these cutting parts (8)
, (11), (12>.

(15) and reinforcement parts (9), (10), (13)
, (14), each radius difference was set to 5 mm.

A cutting blade (3) having a pair of cutting blades as described above.

(4) is a rotating shaft (1
) are arranged in parallel in the axial direction at intervals of cutting width W and are fixedly mounted. Therefore, the cutting blades (3) and (4) are configured to rotate integrally with the rotation shaft (1).

In addition, when attaching the cutting blades (3) and (4) to the rotating shaft (1), a spacer whose width in the axial direction is the cutting width W is inserted between each cutting blade (3) and (4). Alternatively, the cutting blade (3), (
The circumferential speed (4) can be freely changed by controlling a motor or the like.

On the other hand, the receiving blades (5), (6), and (7) are formed into a cylindrical shape using high speed steel or the like, similar to the cutting blades (3) and (4), and have both side surfaces (5a), (5b).
), (6a), (6b), (7a),
The outer peripheral edge of (7b) serves as a cutting edge. In addition, the above-mentioned receiving blades (5), (6),
The axial width of (7), that is, both sides (5a), (
5b), (6a), (6b), (7a)
.

The distance between the blades (7b) is also set to the cutting width W, similar to the cutting blades (3) and (4). These receiving blades (5), (
6) and (7) are installed in parallel in the axial direction with an interval of cutting width W on a rotating shaft (2) that also rotates using a motor or the like as a drive source, and are fixedly attached to the rotating shaft (2). It is designed to rotate as a unit. Also, this receiving blade (5), (
Similarly, the circumferential speeds in (6) and (7) can be freely changed by controlling a motor or the like. Furthermore, when attaching these receiving blades (5), (6), and (7) to the rotating shaft (2), a spacer whose width in the axial direction is the cutting width W is attached to each receiving blade (5), (6). )
, (7) It may be installed by being interposed between.

The diameter and material of the receiving blades (5), (6), and (7) were the same as those of the cutting blades (3) and (4).

Cutting blades (3), (4) and receiving blades (5), (6) are provided on each of the drive shafts (1), (2).
, (7) are arranged facing each other with a slight overlap in the radial direction, and are cutting blades (3).

(4) cutting edge and receiving edge (5), (6), (7) - side surfaces (5b), (6a).

(6b) and (7a) are arranged so as to be in contact with each other. That is, one cutting part (8) of the cutting blade (3)
) and the side surface (5b) of the receiving blade (5), the side surface (lla) of the other cutting part (11) of the cutting blade (3) and the side surface (6a) of the receiving blade (6), the cutting blade One cut part of (4) (
12) side surface (12a) and the side surface (6b) of the receiving blade (6),
Side surface (15a) of the other cutting part (15) of the cutting blade (4)
and the side surface (7a) of the receiving blade (7) are in contact with each other while overlapping in the radial direction.

In this embodiment, the cutting blades (3) and (4) and the receiving blade (5) are used.

The overlap distance 1z in (6) and (7) was set to 1 m.

Therefore, these cutting blades (3), (4) and receiving blade (5)
, (6), and (7) rotate in synchronization in the direction of arrow a in FIG. 2, these cutting blades (3),
(4) and the receiving blades (5), (6), (7) The wide metal foil running between the cutting blades (3), (4) and the receiving blades (5), (6), (7) ) The upper and lower sides are simultaneously cut at intervals of cutting width W. In other words, the Ukeba (
5), (6) and receiving blades (6), (7), and at the same time, cutting is performed between cutting blades (3), (4). At this time, the cutting force is directed in one direction at the receiving blades (5), (6), the parts facing the receiving blades (6), (7), and the parts facing the cutting blades (3), (4), respectively. As a result, the generation of stress is suppressed and the occurrence of cracks on the cut surface is reduced. In addition, the receiving blade (5
), (6) and the receiving blades (6), (7), respectively, and the cutting blades (3), (4), the directions in which cutting forces are applied are opposite to each other. Therefore, according to the present device, cutting can be performed without causing any cracks or the like on the cut surface, and furthermore, cutting can be performed without requiring a cutting allowance. Therefore, the yield can be improved.

As described above, in the cutting device of this embodiment, the cutting blade (3)
The axial width of (4) is set as the cutting width W, but the second width is set slightly larger than the cutting @W, and the cutting blades (3) and (4) are made of elastic material. However, the receiving blades (5), (6), and (7) may be bent so that they mesh with each other.

Next, a specific example of a method for manufacturing a flat coil using the above cutting device will be described.

To produce a flat coil, first, as shown in FIG. 3, a wide metal foil (20) is prepared.

For the metal foil (20), a foil made by rolling a conductive metal material such as copper, aluminum, silver, gold, and alloys thereof into a wide width is used.

Next, an insulating film (23) having semi-cured adhesive layers (21) and (22) on both sides is attached to one side of the metal foil (20).

The insulating film (23) may be any material as long as it has excellent insulating properties, such as polyphenylene sulfide (pps) film or polyethylene terephthalate (PPS) film.
ET) film etc. can be used.

On the other hand, the adhesive layers (21) and (22) include, for example, epoxy resin, urethane resin, acrylic resin,
A resin such as phenoxy resin, cyanoacrylate resin, polyimide resin, etc. applied and dried can be used.

In this embodiment, insulation is made more reliable by providing an insulating film (23), but of course only an adhesive layer may be provided.

Next, a release-treated film (24) is pasted on the adhesive layer (22), and the film (24), metal foil (20), and insulating film (23) are rolled by applying pressure while heating them. Laminate.

To paste the film (24), adhesive layers (21), (2
This is to facilitate cutting of the metal FI% (20) since it also cuts 2).

Next, these films (24) and insulating films (23
), etc., is cut by the above-mentioned cutting device to produce a metal wire having a substantially rectangular cross section and a desired coil width.

Finally, the metal wire cut by the upper distribution cutting device is wound a predetermined number of times around a winding core (not shown) shaped into a desired coil shape. As a result, the flat coil (25
) is created.

In the above winding step, since there is no burr on the cut surface of the metal wire cut by the previous cutting device, the metal wire can be wound around the winding core without any disturbance. Therefore, the obtained flat coil (25) has a high conductor occupation rate and is expected to have high output. Further, when this flat coil (25) is mounted on a wiring board of an external device or the like, it can be mounted with high reliability without lifting up.

Here, a flat coil was actually produced using the cutting device described above.

Implementation ■Soil First, an epoxy/NBR adhesive was prepared according to the following composition.

Nitrile butadiene rubber 100 parts by weight (manufactured by Nippon Zeon Co., Ltd., trade name Hiker 1001) Epoxy resin 130 parts by weight (manufactured by Dainippon Ink Co., Ltd., trade name E-152) Epoxy resin
30 parts by weight (manufactured by Tobu Kasei Co., Ltd., product name YD-17
2) 2-ethyl-4-methylimidazole 1 part by weight Benzoyl peroxide 0.5 parts by weight Methyl ethyl ketone 1000 parts by weight Toluene
700 parts by weight Next, the above epoxy/NBR adhesive was applied to both sides of a 2 μm thick insulating film to a dry thickness of 1 tIm, and then 100 parts by weight was applied.
The adhesive was heated to ~150"C and dried to volatilize and remove the solvent, leaving the adhesive in a semi-hardened state. Next, a rolled 15 μm thick copper foil was placed on one side, and silicon was placed on the other side. A wide metal foil (20) as shown in FIG. 3 was prepared by roll laminating a polyethylene terephthalate film that had been subjected to a peeling treatment at 100°C5 and a pressure of 5kg/cd.

Note that a polyphenylene sulfide (PPS) film manufactured by Toshisha Co., Ltd. was used as the insulating film.

Next, the obtained metal foil (20) was cut into a width of 0.6 m using the cutting device shown in FIGS. 1 and 2 described above.

In addition, at this time, the number of rotations of the cutting blade and the receiver are 10 each.
0rp/100rp/min).

Then, while peeling off the polyethylene terephthalate film provided on one side of the cut gold i-wire, the metal wire was heated to 100°C and wound.
It was heated at °C for 8 hours to form a flat coil.

A flat coil was produced in the same manner as in Example 1, except that the thickness of the real IL copper foil was 401° C.m.

Real] 111 Cut width 1. A flat coil was produced in the same manner as in Example 1, except that Os was used.

A flat coil was produced in the same manner as in Example 2, except that the cutting width was 1.0 mm.

Example 1 except that an epoxy/acrylic rubber adhesive with the following composition was used as the adhesive and the cutting width was 2.0 m and 1 m.
A flat coil was produced in the same manner as above.

Acrylic rubber 100 parts by weight (manufactured by Teikoku Kagaku Sangyo Co., Ltd., trade name 5G-90) Epoxy resin
150 parts by weight (manufactured by Dainippon Ink Co., Ltd., trade name E-152) Phenol 3
0 parts by weight (manufactured by Mitsui Toatsu Chemical Co., Ltd., product name S P-100
0) 2-Ethyl-4-methylimidazole 2 parts by weight Methyl ethyl ketone 1000 parts by weight Toluene 700 parts by weight The epoxy/acrylic rubber adhesive used in Example 5 was used as the adhesive, and the cutting width was 2.0 mm. Other than that, Example 2
A flat coil was produced in the same manner as above.

Next, when we measured the short circuit occurrence rate between the metal wires wound around each of the flat coils obtained in Examples 1 to 6 above, it was 0% in all cases, and no short circuit between the metal wires was observed. .

〔Effect of the invention〕

As is clear from the above description, according to the apparatus of the present invention, it is possible to cut the metal wire without causing any cracks on the cut surface, and it is possible to cut the metal wire to be cut at equal intervals throughout the width. I can do it.

Furthermore, since this device does not require a cutting allowance, it is possible to cut with a high yield and improve productivity.

Furthermore, in the method of the present invention, a flat coil is produced by winding a metal wire with no frills on the cut surface, so that winding can be performed without disorder.

Therefore, a high conductor occupancy rate is obtained, which improves the characteristics as a coil. Furthermore, since the end faces of the wound body are even, external devices and the like can be easily mounted on the wiring board, and electrical connection to the wiring pattern can be made with high reliability.

[Brief explanation of drawings]

FIG. 1 is a schematic front view showing one embodiment of a cutting device to which the present invention is applied, FIG. 2 is a schematic side view thereof, FIG. 3 is an enlarged sectional view showing an example of metal foil, and FIG. The figure is an enlarged perspective view showing an example of a flat coil.・・Rotating axis・・Cutting blade 7・・Buck blade・・Metal foil・・Flat carp

Claims (2)

[Claims] (1) It has a pair of rotating shafts that are arranged facing each other and substantially parallel, one rotating shaft is provided with a pair of cutting blades having a pair of cutting blades at equal intervals, and the other rotating shaft is A cutting device in which cylindrical receiving blades are provided at equal intervals, and the cutting blade and the receiving blade are engaged with each other such that one side of the cutting blade and the receiving blade are in contact with each other. (2) A method for manufacturing a flat coil, which comprises cutting a wide metal foil into a metal wire of a predetermined width by cutting a wide metal foil using the cutting device according to claim (1), and then winding the metal wire.