JP2021010947A - Method for cutting straight conducting wire, and straight conducting wire - Google Patents
Method for cutting straight conducting wire, and straight conducting wire Download PDFInfo
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- 238000005520 cutting process Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 23
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 48
- 238000007665 sagging Methods 0.000 abstract description 12
- 230000002093 peripheral effect Effects 0.000 description 9
- 238000010008 shearing Methods 0.000 description 9
- 239000004020 conductor Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 210000003298 dental enamel Anatomy 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000004962 Polyamide-imide Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000001154 acute effect Effects 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229920003055 poly(ester-imide) Polymers 0.000 description 1
- 229920002312 polyamide-imide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000001902 propagating effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
Description
本発明は、例えば回転電機に使用する平角導線の切断方法および平角導線に関する。 The present invention relates to, for example, a method for cutting a flat wire used in a rotary electric machine and a flat wire.
回転電機に使用されるステータコイルには、多くの電流を流すことができ、かつ占積率を高めることができる矩形断面の平角導線が用いられている。
平角導線は、導体と、その導体表層を覆っている、絶縁皮膜（エナメル皮膜）とを備えている。
導体の材質としては、例えば、銅やニッケルめっき銅などがあり、絶縁皮膜の材質には、例えば、ポリイミド樹脂、ポリエステルイミド樹脂、ポリアミドイミド樹脂などがある。
矩形断面寸法としては、エナメル皮膜を施してある場合で、厚さ：０．５〜５ｍｍ、幅：２〜１５ｍｍ程度である。
For the stator coil used in the rotary electric machine, a flat lead wire having a rectangular cross section capable of passing a large amount of current and increasing the space factor is used.
The flat conductor includes a conductor and an insulating film (enamel film) that covers the surface layer of the conductor.
Examples of the material of the conductor include copper and nickel-plated copper, and examples of the material of the insulating film include polyimide resin, polyesterimide resin, and polyamide-imide resin.
The rectangular cross-sectional dimensions are about 0.5 to 5 mm in thickness and 2 to 15 mm in width when an enamel film is applied.
ステータコイルの製造工程において、平角導線は、所定寸法に切断後、端部の皮膜を剥離し、折り曲げ加工された後、端部同士を接合される。従来、平角導線の切断には、平角導線の長手方向に直交する上下方向から刃物を入れて切断する、せん断加工方法が用いられてきた。（例えば、特許文献１）。 In the process of manufacturing the stator coil, the flat lead wire is cut to a predetermined size, the film at the end is peeled off, the wire is bent, and then the ends are joined to each other. Conventionally, a shearing method has been used for cutting a flat wire by inserting a cutting tool from the vertical direction orthogonal to the longitudinal direction of the flat wire. (For example, Patent Document 1).
しかし、特許文献１のような切断方法では、切断端面もしくはその外周部にバリやダレが生じやすいことが問題であった。例えば、切断端面もしくはその外周部にバリが生じたまま、平角導線同士の端部を接合しようとすると、接合中にバリが脱落し、電気的な短絡が起き、溶接不良を招く恐れがあった。また、ダレが生じていると、皮膜を剥離する際、皮膜の取り残しなどが生じる恐れがあった。 However, in the cutting method as in Patent Document 1, there is a problem that burrs and sagging are likely to occur on the cut end face or the outer peripheral portion thereof. For example, if an attempt is made to join the ends of flat-angle conductors with burrs on the cut end face or the outer peripheral portion thereof, the burrs may fall off during the joining, causing an electrical short circuit, which may lead to poor welding. .. In addition, if sagging occurs, there is a risk that the film may be left behind when the film is peeled off.
そこで本発明では、平角導線を切断する際、切断端面およびその外周部にバリやダレが生じにくい、平角導線の切断方法および平角導線を提供することを目的とする。 Therefore, an object of the present invention is to provide a method for cutting a flat wire and a method for cutting the flat wire so that burrs and sagging are unlikely to occur on the cut end face and the outer peripheral portion thereof when the flat wire is cut.
本発明は、平角導線の長手方向の所定の位置で、前記平角導線の周囲に溝を形成する工程と、
前記溝の両側を把持し、前記把持した位置の間隔を維持したまま、前記平角導線を前記溝に沿ってねじって切断する工程とを、有する平角導線の切断方法である。
The present invention comprises a step of forming a groove around the flat lead wire at a predetermined position in the longitudinal direction of the flat lead wire.
This is a method for cutting a flat wire, which comprises a step of gripping both sides of the groove and twisting and cutting the flat wire along the groove while maintaining the gap between the gripped positions.
また、前記溝を、前記平角導線の幅狭面より前記平角導線の幅広面において深く形成することが好ましい。 Further, it is preferable that the groove is formed deeper on the wide surface of the flat lead wire than on the narrow surface of the flat lead wire.
また、長手方向に垂直な断面が四角形状の平角導線であって、長手方向の端面が、中央側の破断面と、それを取り巻くせん断面を有する平角導線である。 Further, the cross section perpendicular to the longitudinal direction is a quadrangular flat lead wire, and the end face in the longitudinal direction is a flat lead wire having a fracture surface on the center side and a shear surface surrounding the fracture surface.
本発明によれば、平角導線を切断する際、切断端面およびその外周部にバリやダレが生じにくい、平角導線の切断方法および平角導線を提供できる。 According to the present invention, it is possible to provide a method for cutting a flat wire and a method for cutting the flat wire so that burrs and sagging are less likely to occur on the cut end face and the outer peripheral portion thereof when the flat wire is cut.
以下、本発明に係る切断方法の実施形態について、図面を参照しながら詳細に説明する。但し、本発明が以下の実施形態に限定される訳ではない。また、説明を明確にするため、以下の記載及び図面は、適宜、簡略化されている。 Hereinafter, embodiments of the cutting method according to the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments. Further, in order to clarify the explanation, the following description and drawings have been simplified as appropriate.
本発明は、平角導線の長手方向の所定の位置で、平角導線の周囲に溝を形成する工程と、
前記溝の両側を把持し、前記把持した位置の間隔を維持したまま、前記平角導線を前記溝に沿ってねじって切断する工程とを有することを、ひとつの特徴とする平角導線の切断方法である。
ここで、平角導線の長手方向とは、導線の線長方向である。また、平角導線の長手方向に沿った側面のうち、平角導線の長手方向に直交する断面の長辺側に相当する面を幅広面（幅）、短辺側に相当する面を幅狭面（厚さ）と呼ぶこととする。
The present invention comprises a step of forming a groove around a flat wire at a predetermined position in the longitudinal direction of the flat wire.
One of the features of the method for cutting a flat wire is to have a step of gripping both sides of the groove and twisting and cutting the flat wire along the groove while maintaining the distance between the gripped positions. is there.
Here, the longitudinal direction of the flat lead wire is the line length direction of the lead wire. Of the side surfaces along the longitudinal direction of the flat lead wire, the surface corresponding to the long side of the cross section orthogonal to the longitudinal direction of the flat lead wire is the wide surface (width), and the surface corresponding to the short side is the narrow surface (width). It will be called (thickness).
（溝形成工程）
まず、図１〜３を用いて、平角導線１に溝１ｄを形成する工程について、説明する。
本実施形態では、まず、図１に示すような、平角導線１の所定の位置１ａの長手方向に直交する周囲、すなわち、幅広面１ｂおよび幅狭面１ｃの外周に、図２に示すような、連続した溝１ｄを形成する。つまり、幅広面１ｂに形成された長手方向に直交する溝１ｄと、幅狭面１ｃに形成された長手方向に直交する溝１ｄとが、繋がっている。
溝１ｄを形成する方法としては、刃物やレーザ照射装置などがある。刃物を用いる場合、刃先角度の鋭角な刃物、例えば、１５°〜３０°の刃物を用いることが好ましく、１５°〜２０°の刃物がより好ましい。
加えて、図１（ａ），（ｂ）に示すように、刃物２ａおよび２ｂとを、平角導線１を挟んで対置させ、各面外周に同時に溝１ｄを形成することが好ましい。図１（ａ）、（ｂ）のように刃物を使って溝を形成することで、せん断面は、四角形状の各辺側毎に、せん断方向が異なる複数のせん断部を有し、複数のせん断部のせん断方向は四角形状の各辺側から中央側（中心側）に向かう方向になる。
せん断方向について、例えば、図３に示すように、幅広面１ｂに直交するせん断方向４１と、幅狭面１ｃに直交する方向４２とがある。
一方、レーザ照射装置を用いる場合には、短波長のレーザ光、例えば、グリーンレーザを用いる場合には、所定の位置１ａだけにレーザ光の吸収率を高める処理を行うことが好ましい。
(Groove formation process)
First, the step of forming the groove 1d in the flat conducting wire 1 will be described with reference to FIGS. 1 to 3.
In the present embodiment, first, as shown in FIG. 1, the circumference orthogonal to the longitudinal direction of the predetermined position 1a of the flat lead wire 1, that is, the outer periphery of the wide surface 1b and the narrow surface 1c, as shown in FIG. , A continuous groove 1d is formed. That is, the groove 1d formed on the wide surface 1b and orthogonal to the longitudinal direction and the groove 1d formed on the narrow surface 1c and orthogonal to the longitudinal direction are connected.
Examples of the method for forming the groove 1d include a cutting tool and a laser irradiation device. When a blade is used, it is preferable to use an acute-angled blade, for example, a blade having an acute angle of 15 ° to 30 °, and a blade having a cutting edge angle of 15 ° to 20 ° is more preferable.
In addition, as shown in FIGS. 1 (a) and 1 (b), it is preferable that the blades 2a and 2b are opposed to each other with the flat lead wire 1 interposed therebetween to simultaneously form a groove 1d on the outer periphery of each surface. By forming a groove using a cutting tool as shown in FIGS. 1A and 1B, the sheared surface has a plurality of shearing portions having different shearing directions for each side of the quadrangular shape, and a plurality of shearing portions. The shearing direction of the sheared portion is from each side of the quadrangular shape toward the center side (center side).
Regarding the shearing direction, for example, as shown in FIG. 3, there is a shearing direction 41 orthogonal to the wide surface 1b and a direction 42 orthogonal to the narrow surface 1c.
On the other hand, when a laser irradiation device is used, it is preferable to perform a process of increasing the absorption rate of the laser light only at a predetermined position 1a when using a laser beam having a short wavelength, for example, a green laser.
（ねじり工程）
次に、図４を用いて、溝１ｄに沿ってねじって切断する工程について、説明する。
本工程では、溝１ｄが形成された平角導線１１について、その溝１ｄの両側を把持し、前記把持した位置の間隔を維持したまま、溝１ｄに沿ってねじって切断する。すなわち、図４に示すように、溝１ｄが形成された平角導線１１の溝１ｄ近傍の両側を把持工具３で把持し、把持した位置の間隔を維持した状態で、把持工具３を相対的に回転（図４中の矢印の向き）させることで、平角導線１１にねじり力を加えて、溝１ｄに沿ってねじって切断する。把持工具３の回転方向は、平角導線１１の長手方向に対して垂直方向とする。
(Torsion process)
Next, the step of twisting and cutting along the groove 1d will be described with reference to FIG.
In this step, the flat guide wire 11 on which the groove 1d is formed is gripped on both sides of the groove 1d and twisted and cut along the groove 1d while maintaining the gap between the gripped positions. That is, as shown in FIG. 4, both sides of the flat lead wire 11 in which the groove 1d is formed near the groove 1d are gripped by the gripping tool 3, and the gripping tool 3 is relatively held in a state where the gap between the gripped positions is maintained. By rotating (in the direction of the arrow in FIG. 4), a twisting force is applied to the flat lead wire 11 to twist and cut along the groove 1d. The rotation direction of the gripping tool 3 is perpendicular to the longitudinal direction of the flat lead wire 11.
平角導線１の所定の位置１ａに溝１ｄを形成することによって、所定の位置１ａの断面積が局所的に減少する。これにより、所定の位置１ａの断面のみ、せん断応力を大きくすることができ、溝１ｄに沿って容易にねじって切断できるようになる。この切断方法であれば、図５に示すような切断後の平角導線１２のように、切断端面１２ａに生じる材料流れを溝１ｄ内部に留めることが可能となり、切断端面１２ａおよびその外周部にバリが生じることを抑制できる。加えて、容易にねじれることで、溝１ｄに対して加えられた回転力が、所定の位置１ａ以外に伝播することを防ぎ、切断部周辺の変形を抑制できる。またさらに、平角導線１１に掛かる負荷が、溝１ｄを形成する分だけで済むため、ダレを生じにくくすることができる。溝１ｄの長手方向に垂直な断面で見た溝１ｄの先端（底部）形状は、Ｕ字状、Ｖ字状等を用いることができる。切断する位置のバラつきを抑制しやすいＶ字形状を用いることがより好ましい。
上述の切断方法によって、長手方向の端面が、中央側の破断面と、それを取り巻く（周囲の）せん断面を有する平角導線１２を得ることができる。かかる平角導線１２では、切断端面１２ａおよびその外周部にバリが生じることが抑制される効果が発揮される。なお、図５では、平角導線１２の一端面側しか示していないが、他端面についても同様にして、上述の切断方法によって、長手方向の端面が、中央側の破断面と、それを取り巻くせん断面を有する平角導線１２を得ることができる。そして、長手方向の端面が、中央側の破断面と、それを取り巻くせん断面を有した、平角導線を得ることができる。このような平角導線であれば、バリやダレが生じにくい端面を有しているため、例えば、平角導線の絶縁皮膜を剥離する際の位置決めが容易になり、生産性の向上が期待できる。
By forming the groove 1d at the predetermined position 1a of the flat wire 1, the cross-sectional area of the predetermined position 1a is locally reduced. As a result, the shear stress can be increased only in the cross section of the predetermined position 1a, and the shear stress can be easily twisted and cut along the groove 1d. With this cutting method, it is possible to keep the material flow generated in the cut end face 12a inside the groove 1d as in the flat lead wire 12 after cutting as shown in FIG. 5, and the cut end face 12a and its outer peripheral portion have burrs. Can be suppressed. In addition, by easily twisting, the rotational force applied to the groove 1d can be prevented from propagating to a position other than the predetermined position 1a, and deformation around the cut portion can be suppressed. Furthermore, since the load applied to the flat conducting wire 11 is only the amount that forms the groove 1d, it is possible to prevent sagging. The tip (bottom) shape of the groove 1d as viewed in a cross section perpendicular to the longitudinal direction of the groove 1d may be U-shaped, V-shaped, or the like. It is more preferable to use a V-shape that can easily suppress variations in the cutting position.
By the cutting method described above, it is possible to obtain a flat lead wire 12 having a fracture surface on the central side and a shear plane (surrounding) surrounding the fracture surface in the longitudinal direction. In such a flat conducting wire 12, the effect of suppressing the formation of burrs on the cut end face 12a and the outer peripheral portion thereof is exhibited. Although only one end surface side of the flat lead wire 12 is shown in FIG. 5, similarly, the end surface in the longitudinal direction is formed on the fracture surface on the center side and the fracture surface surrounding the other end surface by the above-mentioned cutting method. A flat lead wire 12 having a cross section can be obtained. Then, it is possible to obtain a flat-angle conducting wire having a fracture surface on the central side and a sheared surface surrounding the fracture surface in the longitudinal direction. Since such a flat wire has an end face that is less likely to cause burrs and sagging, for example, positioning when peeling the insulating film of the flat wire becomes easy, and improvement in productivity can be expected.
また、平角導線１１を溝１ｄに沿ってねじる際には、溝１ｄ近傍の両側を把持した位置の間隔を維持することで、溝１ｄの両側に張力および圧縮力が加わらないようにする。これにより、平角導線が展伸することを防ぎ、切断端面１２ａおよびその外周部にバリが生じることを抑制できる。 Further, when twisting the flat lead wire 11 along the groove 1d, tension and compressive force are not applied to both sides of the groove 1d by maintaining the distance between the positions where both sides of the groove 1d are gripped. As a result, it is possible to prevent the flat lead wire from extending and prevent burrs from being generated on the cut end surface 12a and the outer peripheral portion thereof.
把持した位置の間隔は、２．０ｍｍ以下であることが好ましく、より好ましくは、１．０ｍｍ以下であり、間隔を設けずに把持することがさらに好ましい。
加えて、平角導線１１に、引張力や圧縮力を加えずねじっていくことで、溝１ｄや平角導線１が伸長してしまったり、断面形状が変形してしまったりすることを抑制できる。また、平角導線１１の全面を把持することが好ましい。
またさらには、溝１ｄから把持した位置までの距離を１．０ｍｍ以下とすると、溝１ｄでのねじり応力が集中しやすくなり、溝１ｄで囲まれた面を回転中心にして、平角導線１自体がねじれてしまうことを防ぐことが出来る。
The distance between the gripped positions is preferably 2.0 mm or less, more preferably 1.0 mm or less, and it is further preferable to hold the grip without any gap.
In addition, by twisting the flat conducting wire 11 without applying a tensile force or a compressive force, it is possible to prevent the groove 1d and the flat conducting wire 1 from being elongated or the cross-sectional shape being deformed. Further, it is preferable to grip the entire surface of the flat lead wire 11.
Furthermore, if the distance from the groove 1d to the gripped position is 1.0 mm or less, the torsional stress in the groove 1d is likely to be concentrated, and the surface surrounded by the groove 1d is set as the center of rotation, and the flat lead wire 1 itself. Can be prevented from twisting.
溝１ｄについて、幅狭面１ｃよりも幅広面１ｂの溝１ｄの深さを深くすると、溝１ｄ形成後の所定の位置１ａの断面は、幅狭面を構成する辺長に対して幅広面を構成する辺長の比が大きくなる。これにより、平角導線１を溝１ｄに沿ってねじった時、所定の位置１ａのせん断応力をさらに大きくできるため、ねじる量がより少なくて済み、より一層ねじって切断しやすくなる。
なお、溝１ｄに沿ってねじる際の方向は、一方向だけにねじっても、正逆転させた往復方向でねじっても良い。
When the depth of the groove 1d of the wide surface 1b is deeper than that of the narrow surface 1c of the groove 1d, the cross section of the predetermined position 1a after the formation of the groove 1d has a wide surface with respect to the side length constituting the narrow surface. The ratio of the constituent side lengths increases. As a result, when the flat lead wire 1 is twisted along the groove 1d, the shear stress at the predetermined position 1a can be further increased, so that the amount of twisting is smaller and the twisting is easier.
The direction of twisting along the groove 1d may be twisted in only one direction or in the reciprocating direction in which the forward and reverse directions are reversed.
なお、ねじり応力の計算式から限りなくタテが低く、ヨコが長い、せん断面が最も応力が大きい。しかし現実で切欠きを深くしすぎると切断刃の角度が切断端面に転写されるため、垂直な切断端面が得られなくなる。そのため、刃の転写角度が浅い範囲で幅広面に優先的に刃を入れ、横長の長方形せん断面を作ることが好ましい。 From the calculation formula of torsional stress, the vertical is extremely low, the horizontal is long, and the sheared surface has the largest stress. However, in reality, if the notch is made too deep, the angle of the cutting blade is transferred to the cutting end face, so that a vertical cutting end face cannot be obtained. Therefore, it is preferable to preferentially insert the blade into a wide surface in a range where the transfer angle of the blade is shallow to form a horizontally long rectangular sheared surface.
次に、本発明の平角導線の切断方法および得られた平角導線について、実施例を詳細に説明する。以下、実施例には、皮膜厚さ０．１２ｍｍを含む、幅広面３．５ｍｍ、幅狭面２．８ｍｍのエナメル皮膜付き平角導線を用いた。 Next, examples of the method for cutting the flat lead wire of the present invention and the obtained flat lead wire will be described in detail. Hereinafter, in Examples, a flat lead wire with an enamel film having a wide surface of 3.5 mm and a narrow surface of 2.8 mm, including a film thickness of 0.12 mm, was used.
実施例として、平角導線１の所定の位置１ａの幅狭面１ｃに０．５０ｍｍ、幅広面１ｂに０．８５ｍｍの溝深さを有するＶ字状の溝１ｄを形成した。溝１ｄの形成には、図１の刃物２ａおよび２ｂとして、刃先角度２０°の両刃形状の刃物を用いた。またこのときのせん断方向は、幅広面１ｂに直交し、かつ平角導線の中央側に向かう方向と、幅狭面１ｃに直交し、かつ平角導線の中央側に向かう方向とした。そして、溝１ｄの両側に張力および圧縮力が加わらないようにしながら、溝に沿って、一方向にねじって切断した。ここで、前記溝深さとは、平角導線１の皮膜表面を開始点として、刃物２ａおよび２ｂそれぞれが平角導線１内に進入した量とした。 As an example, a V-shaped groove 1d having a groove depth of 0.50 mm on the narrow surface 1c at a predetermined position 1a of the flat lead wire 1 and 0.85 mm on the wide surface 1b was formed. For the formation of the groove 1d, a double-edged blade having a cutting edge angle of 20 ° was used as the blades 2a and 2b in FIG. The shearing direction at this time was defined as a direction orthogonal to the wide surface 1b and toward the center of the flat conductor and a direction orthogonal to the narrow surface 1c and toward the center of the flat conductor. Then, the groove 1d was twisted and cut in one direction along the groove while not applying tension and compressive force to both sides. Here, the groove depth is defined as the amount by which the blades 2a and 2b each enter the flat lead wire 1 with the film surface of the flat lead wire 1 as the starting point.
一方、比較例として、実施例と同等の平角導線１を用いて、その平角導線１の長手方向に直交するようにして、シャー切断した場合（比較例１）を用意した。 On the other hand, as a comparative example, a case was prepared in which a flat lead wire 1 equivalent to that of the embodiment was used and sheared so as to be orthogonal to the longitudinal direction of the flat lead wire 1 (Comparative Example 1).
切断した平角導線１の評価について、光学顕微鏡を用いて切断端面１２ａおよびその外周部を観察した。切断端面１２ａおよびその外周について、０．０５ｍｍ以上の突起が観察された場合、バリ有りと判断した。ダレの有無についても、切断端面１２ａに向かってダレが生じていないか、光学顕微鏡を用いて観察した。 Regarding the evaluation of the cut flat lead wire 1, the cut end face 12a and the outer peripheral portion thereof were observed using an optical microscope. When a protrusion of 0.05 mm or more was observed on the cut end face 12a and its outer circumference, it was determined that there was a burr. Regarding the presence or absence of sagging, it was observed using an optical microscope whether or not sagging occurred toward the cut end face 12a.
実施例の溝１ｄは、幅広面１ｂに対する幅狭面１ｃの長さの比が、溝１ｄ形成前に比べて溝１ｄ形成後の方が小さくなるような、平角導線１の所定の位置１ａの長手方向に直交する幅狭面１ｃに０．５０ｍｍ、幅広面１ｂに０．８５ｍｍの溝深さを有するＶ字状の溝を形成したが、このときの切断端面における、幅狭面と幅広面との比は、１：２．５であった。 In the groove 1d of the embodiment, the ratio of the length of the narrow surface 1c to the wide surface 1b is smaller after the groove 1d is formed than before the groove 1d is formed, at a predetermined position 1a of the flat lead wire 1. A V-shaped groove having a groove depth of 0.50 mm on the narrow surface 1c orthogonal to the longitudinal direction and 0.85 mm on the wide surface 1b was formed, and the narrow surface and the wide surface in the cut end surface at this time were formed. The ratio with was 1: 2.5.
このような条件で切断した場合、図６（ａ）に示した、切断端面を短手方向から写した画像のように、溝１ｄに沿って軸に対して直角方向に容易に破断され、長手方向の端面は、中央側の破断面と、それを取り巻くせん断面を有する形態となった。切断端面およびその外周部にバリは生じておらず、切断部周辺のダレも見当たらなかった。 When cut under such conditions, it is easily broken along the groove 1d in the direction perpendicular to the axis, as shown in the image of the cut end face taken from the short side as shown in FIG. 6A, and the length is long. The end face in the direction has a fracture surface on the center side and a shear plane surrounding the fracture surface. No burrs were formed on the cut end face and the outer peripheral portion thereof, and no sagging around the cut portion was found.
一方、図６（ｂ）および（ｃ）に、比較例１および２の条件で切断した場合の切断端面を短手方向から写した画像を示す。図６（ｂ）に示した比較例１では、切断部の外周にバリが生じ、切断部周辺にダレが生じる結果を得た。
以上から、本発明の実施例において、表１に示すような、本実施例の溝深さの条件において、比較例１に対する本実施例のバリ、ダレの抑制効果を得た。
From the above, in the examples of the present invention, under the conditions of the groove depth of the present example as shown in Table 1, the effect of suppressing burrs and sagging of the present example with respect to Comparative Example 1 was obtained.
１ 平角導線
１ａ 所定の位置
１ｂ 幅広面
１ｃ 幅狭面
１ｄ 溝
１１ 平角導線
１２ 平角導線
１２ａ 切断端面
２ 刃物
２ａ 刃物
２ｂ 刃物
３ 把持工具
４１ せん断方向
４２ せん断方向
1 Flat angle lead wire 1a Predetermined position 1b Wide surface 1c Narrow surface
1d groove 11 flat lead wire 12 flat lead wire 12a cutting end face 2 blade 2a blade 2b blade 3 gripping tool 41 shear direction 42 shear direction
Claims (3)
前記溝の両側を把持し、前記把持した位置の間隔を維持したまま、前記平角導線を前記溝に沿ってねじって切断する工程とを、
有する平角導線の切断方法。 A step of forming a groove around the flat wire at a predetermined position in the longitudinal direction of the flat wire, and
A step of gripping both sides of the groove and twisting and cutting the flat lead wire along the groove while maintaining the gap between the gripped positions.
How to cut a flat lead wire.
ことを特徴とする請求項１に記載の平角導線の切断方法。 The groove is formed deeper on the wide surface of the flat lead wire than on the narrow surface of the flat lead wire.
The method for cutting a flat lead wire according to claim 1.
長手方向の端面が、中央側の破断面と、それを取り巻くせん断面を有することを特徴とする平角導線。
A flat lead wire with a rectangular cross section perpendicular to the longitudinal direction.
A flat lead wire having a longitudinal end face having a fracture surface on the central side and a shear plane surrounding the fracture surface.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113600720A (en) * | 2021-08-10 | 2021-11-05 | 珠海锐翔智能科技有限公司 | Flexible flat wire processing method and punching equipment |
| WO2022196822A1 (en) * | 2021-03-19 | 2022-09-22 | 株式会社アイシン | Method for manufacturing stator for rotary electric machine |
| CN116073603A (en) * | 2023-03-13 | 2023-05-05 | 邦迪智能装备(河南)有限公司 | Coil end sharp angle forming device of flat wire motor |
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2020
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022196822A1 (en) * | 2021-03-19 | 2022-09-22 | 株式会社アイシン | Method for manufacturing stator for rotary electric machine |
| CN113600720A (en) * | 2021-08-10 | 2021-11-05 | 珠海锐翔智能科技有限公司 | Flexible flat wire processing method and punching equipment |
| CN113600720B (en) * | 2021-08-10 | 2023-07-18 | 珠海锐翔智能科技有限公司 | Flexible flat wire processing method and punching equipment |
| CN116073603A (en) * | 2023-03-13 | 2023-05-05 | 邦迪智能装备(河南)有限公司 | Coil end sharp angle forming device of flat wire motor |
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