JP6650304B2 - Crimp terminal manufacturing method - Google Patents

Crimp terminal manufacturing method Download PDF

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JP6650304B2
JP6650304B2 JP2016052414A JP2016052414A JP6650304B2 JP 6650304 B2 JP6650304 B2 JP 6650304B2 JP 2016052414 A JP2016052414 A JP 2016052414A JP 2016052414 A JP2016052414 A JP 2016052414A JP 6650304 B2 JP6650304 B2 JP 6650304B2
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leading edge
core wire
thin
pressing
crimping
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JP2017168297A (en
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素文 加藤
素文 加藤
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Yazaki Corp
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Description

本発明は圧着端子の製造方法に関する。 The present invention relates to a process for producing a crimped end child.

従来、圧着端子は、金属板をプレス加工(打ち抜き加工および曲げ加工)したものであって、他の端子に接触する接触部と、被覆電線を構成する芯線を保持する芯線加締め部(ワイヤバレル部に同じ)と、被覆電線を構成する被覆を保持する被覆加締め部(インシュレーションバレル部に同じ)とを有している。
芯線加締め部は、略半円筒状の芯線受け部(基底部に同じ)と芯線受け部の両側縁に繋がった略平面状の芯線圧着片(加締め片部に同じ)とを具備する断面略U字状に成形されている。そして、芯線受け部に芯線を載置した状態で、芯線を包み込むように芯線圧着片を曲げ、芯線圧着片の先端縁を芯線(正確には、芯線を構成する素線の間)に食い込ませることによって、芯線圧着片と芯線、および素線同士を圧着する(凝着させる)ものである。
このとき、芯線の外径に比較して芯線圧着片の厚さが相対的に大きい場合には、芯線圧着片の先端縁が芯線(素線の間)に適切に食い込み難くなることから、芯線圧着片と芯線との接触抵抗が高くなったり、芯線を保持する力が低くなったりする不都合が生じる。このため、これを解消する目的で、芯線圧着片の先端縁に面取り部(所謂「C面取り」に同じ)を形成した発明が開示されている(例えば、特許文献1参照)。
2. Description of the Related Art Conventionally, a crimp terminal is formed by pressing (punching and bending) a metal plate, and includes a contact portion that contacts another terminal, and a core wire crimping portion (wire barrel) that holds a core wire constituting a covered electric wire. And an insulation crimping part (same as the insulation barrel part) for holding the coating constituting the coated electric wire.
The core wire crimping section is a cross section including a substantially semi-cylindrical core wire receiving portion (same as the base portion) and a substantially flat core wire crimping piece (same as the crimping piece portion) connected to both side edges of the core wire receiving portion. It is formed in a substantially U shape. Then, with the core wire placed on the core wire receiving portion, the core wire crimping piece is bent so as to wrap the core wire, and the leading edge of the core wire crimping piece is bitten into the core wire (more precisely, between the wires constituting the core wire). Thereby, the core wire crimping piece and the core wire, and the element wires are crimped (adhered).
At this time, if the thickness of the core wire crimping piece is relatively large compared to the outer diameter of the core wire, the leading edge of the core wire crimping piece becomes difficult to properly bite into the core wire (between the strands). Inconveniences such as an increase in contact resistance between the crimping piece and the core wire and a decrease in the force for holding the core wire occur. For this reason, an invention in which a chamfer (the same as a so-called "C chamfer") is formed at the leading edge of the core wire crimping piece for the purpose of solving this problem is disclosed (for example, see Patent Document 1).

特開2011−44423号公報(第7−8頁、図4)JP 2011-44423 A (pages 7-8, FIG. 4)

しかしながら、特許文献1に開示された発明(圧着端子金具)は、銅合金等の金属材料板を打ち抜き加工した後、芯線圧着片の先端縁に近い範囲をテーパ状の金型面を具備する押圧金型によって押圧加工するものであるが、メッキ等の表面処理層が形成された金属材料板を用いたのでは、以下のような問題がある。
すなわち、メッキ層の塑性変形能と金属材料板自体(以下「母材」と称す)の塑性変形能とが相違するため、押圧加工において、メッキ層と母材とは同一の変形挙動を呈しない。すなわち、面取り部におけるメッキ層は、母材とは相違したせん断変形をすることになるため、メッキ層の表層(金型に当接する面)は、面取り部の先端縁(芯線圧着片の厚さが最も薄くなる縁)に向かって移動し、略針状の「微細メッキ条」を形成するという問題がある。
However, in the invention (crimp terminal fitting) disclosed in Patent Document 1, after a metal material plate such as a copper alloy is punched, a region close to the leading edge of the core wire crimping piece is provided with a tapered mold surface. Although pressing is performed by a metal mold, the use of a metal material plate on which a surface treatment layer such as plating is formed has the following problems.
That is, since the plastic deformation ability of the plating layer and the plastic deformation ability of the metal material plate itself (hereinafter, referred to as “base material”) are different, the plating layer and the base material do not exhibit the same deformation behavior in the pressing process. . That is, since the plating layer in the chamfered portion undergoes shear deformation different from that of the base material, the surface layer of the plating layer (the surface that comes into contact with the mold) has the tip edge of the chamfered portion (thickness of the core wire crimping piece). Move toward the thinnest edge) to form a substantially needle-shaped “fine plated strip”.

すなわち、微細メッキ条は、面取り部の先端縁の端面に手繰り寄せられたように付着するものであるため、外力が作用した際、当該端面から離脱するおそれがある。
そうすると、微細メッキ条が離脱した場合、離脱した微細メッキ条が当該圧着端子に接続される他の端子との接続部に侵入して、電気的通電性能に悪影響(高い電気抵抗等)が生じる可能性がある。また、複数の当該圧着端子を収納したコネクタにおいては、離脱した微細メッキ条が隣接する当該圧着端子との間に侵入して、隣接する当該圧着端子との間で短絡(ショート)が生じたりする可能性がある。
That is, since the fine plated strip adheres to the end face of the leading edge of the chamfered portion as if dragged, there is a possibility that the fine plated strip may be detached from the end face when an external force acts.
Then, when the fine plated strip is detached, the detached fine plated strip may enter a connection portion with another terminal connected to the crimp terminal and adversely affect electric conduction performance (high electric resistance or the like). There is. Further, in the connector housing the plurality of crimp terminals, the detached fine plated strip may enter between the adjacent crimp terminals and cause a short circuit with the adjacent crimp terminals. there is a possibility.

本発明は、このような状況に鑑みてなされたものであり、微細メッキ条の発生を抑えながら、芯線圧着片(加締め片部)の先端縁を芯線(素線の間)に適切に食い込ませることができる圧着端子の製造方法を提供することにある。 The present invention has been made in view of such a situation, and appropriately cuts the leading edge of a core wire crimping piece (crimping piece portion) into a core wire (between strands) while suppressing the occurrence of fine plating strips. it is to provide a method for producing a crimped end element which can be.

発明に係る圧着端子の製造方法は、複数の素線からなる芯線を具備する電線の前記芯線を保持する芯線加締め部を有する圧着端子の製造方法であって、
前記芯線加締め部は、基底部と前記基底部の両側縁にそれぞれ延設された加締め片部とを具備し、
前記加締め片部の先端縁から所定の範囲に、前記先端縁に近くなる程、板厚が段階的に減少する階段状の薄肉範囲または板厚が徐々に減少するテーパ状の薄肉範囲が成形され、
母材およびメッキ層を具備する板材を押圧加工して、前記加締め片部の先端縁から所定の範囲に相当する範囲に前記薄肉範囲を具備する押圧材を成形する第1工程と、
前記押圧材を打ち抜き加工して、前記芯線加締め部の外郭形状を具備する打ち抜き材を成形する第2工程とを有することを特徴とする。
The method for manufacturing a crimp terminal according to the present invention is a method for manufacturing a crimp terminal having a core crimping portion that holds the core of an electric wire including a core composed of a plurality of strands,
The core wire caulking portion includes a base portion and a caulking piece portion respectively extended on both side edges of the base portion,
A stepped thin-walled area in which the thickness gradually decreases or a tapered thin-walled area in which the thickness gradually decreases is formed in a predetermined range from the leading edge of the caulking piece portion as the closer to the leading edge. And
A first step of pressing a plate material having a base material and a plating layer to form a pressing material having the thin-walled area in a range corresponding to a predetermined range from a leading edge of the caulking piece portion,
And a second step of punching the pressing material to form a punched material having an outer shape of the core wire crimping portion.

発明に係る圧着端子の製造方法は、以上の構成であって、板材を押圧加工して薄肉範囲を具備する押圧材を成形した後、押圧材を打ち抜き加工するから、仮に、押圧加工によって微細メッキ条が発生したとしても、微細メッキ条が圧着端子に取り込まれないように打ち抜き加工することができる。したがって、微細メッキ条のない圧着端子を得ることができると共に、加締め片部の先端縁を芯線(素線の間)に適切に食い込ませることができる。 The method for manufacturing a crimp terminal according to the present invention has the above-described configuration, and after pressing a plate material to form a pressing material having a thin-walled range and then punching the pressing material, it is tentatively assumed that the pressing material is fine. Even if a plating strip is generated, it is possible to perform a punching process so that the fine plating strip is not taken into the crimp terminal. Therefore, a crimp terminal without fine plating strips can be obtained, and the leading edge of the crimping piece can be appropriately cut into the core wire (between the strands).

本発明の実施の形態1に係る圧着端子を説明する全体を示す斜視図である。FIG. 2 is a perspective view showing the whole of the crimp terminal according to Embodiment 1 of the present invention. 本発明の実施の形態1に係る圧着端子を説明するものであって、保持する電線を示す斜視図である。FIG. 4 is a perspective view illustrating a crimp terminal according to Embodiment 1 of the present invention and illustrating an electric wire to be held. 本発明の実施の形態1に係る圧着端子を説明するものであって、一部(芯線加締め部)を拡大して示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a crimp terminal according to Embodiment 1 of the present invention and is an enlarged view of a part (core wire crimping portion). 本発明の実施の形態1に係る圧着端子を説明するものであって、一部の部分(芯線加締め部の加締め片部)を切り出して拡大して示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view illustrating a crimp terminal according to Embodiment 1 of the present invention, in which a part (a crimping piece of a core wire crimping portion) is cut out and enlarged. 本発明の実施の形態1に係る圧着端子の作用効果を説明するものであって、(a)は製造工程の一部を模式的に示す断面図、(b)は製造工程の一部を拡大して模式的に示す断面図である。4A and 4B are diagrams for explaining the function and effect of the crimp terminal according to Embodiment 1 of the present invention, wherein FIG. 4A is a cross-sectional view schematically illustrating a part of a manufacturing process, and FIG. It is sectional drawing which shows typically. 本発明の実施の形態1に係る圧着端子の作用効果を説明するものであって、(a)は比較材における製造工程の一部を模式的に示す断面図、(b)は比較材における製造工程の一部を拡大して模式的に示す断面図である。4A and 4B are diagrams for explaining the function and effect of the crimp terminal according to Embodiment 1 of the present invention, in which FIG. It is sectional drawing which expands some processes and shows typically. 本発明の実施の形態1に係る圧着端子の変形例を説明するものであって、一部を拡大して示す断面図である。FIG. 6 is a cross-sectional view illustrating a modification of the crimp terminal according to Embodiment 1 of the present invention and showing a part of the crimp terminal in an enlarged manner. 本発明の実施の形態1に係る圧着端子の使用状況を説明するものであって、(a)は側面視の断面図、(b)は正面視の断面図である。4A and 4B illustrate a usage state of the crimp terminal according to Embodiment 1 of the present invention, where FIG. 4A is a cross-sectional view in a side view, and FIG. 本発明の実施の形態2に係る圧着端子の製造方法を説明するものであって、製造工程の一部を模式的に示す断面図である。FIG. 8 is a cross-sectional view for explaining the method of manufacturing the crimp terminal according to Embodiment 2 of the present invention, and schematically showing a part of the manufacturing process. 本発明の実施の形態2に係る圧着端子の製造方法を説明するものであって、比較材における製造工程の一部を模式的に示す断面図である。FIG. 8 is a cross-sectional view for explaining the method of manufacturing the crimp terminal according to Embodiment 2 of the present invention and schematically illustrating a part of the manufacturing process of the comparative material.

以下、発明を実施するための形態(以下、「実施の形態」という)を、図面を参照しつつ説明する。なお、各図は模式的に描かれたものであって、本発明は図示された形態(部位の形状や個数等)に限定されるものではない。また、図面が煩雑にならないようにするため、一部の部材または一部の符号の記載を省略する場合がある。   Hereinafter, embodiments for carrying out the invention (hereinafter, referred to as “embodiments”) will be described with reference to the drawings. In addition, each drawing is schematically drawn, and the present invention is not limited to the illustrated form (shape and number of parts). In some cases, descriptions of some members or some reference numerals are omitted in order not to complicate the drawings.

[実施の形態1]
図1〜図4は本発明の実施の形態1に係る圧着端子を説明するものであって、図1は全体を示す斜視図、図2は保持する電線を示す斜視図、図3は一部(芯線加締め部)を拡大して示す斜視図、図4は一部の部分(芯線加締め部の加締め片部)を切り出して拡大して示す斜視図である。なお、図3において、切断した面に斜線を付している。
[Embodiment 1]
1 to 4 illustrate a crimp terminal according to Embodiment 1 of the present invention. FIG. 1 is a perspective view showing the whole, FIG. 2 is a perspective view showing an electric wire to be held, and FIG. FIG. 4 is an enlarged perspective view showing a (core wire caulking portion), and FIG. 4 is a perspective view showing a part (a caulking piece portion of the core wire caulking portion) cut out and enlarged. In FIG. 3, the cut surface is hatched.

(圧着端子)
図1において、圧着端子100は、板材1(図5参照)を成形したものであって、他の端子との接続のための接触部10と、電線90を構成する芯線92(図2参照)を保持する芯線加締め部20と、電線90を構成する被覆93(図2参照)を保持する被覆加締め部30とを有している。
また、板材1は、銅(Cu)または銅合金製の母材2の表面にメッキされた錫(Sn)のメッキ層3を具備する(図5参照)。なお、メッキ層3は、母材2の表面に直接形成されても、あるいは、母材2にメッキされたニッケル(Ni)下地に形成されてもよい。また、母材2の材質およびメッキ層3の材質は前記に限定されるものではない。
(Crimp terminal)
In FIG. 1, a crimp terminal 100 is formed by molding a plate material 1 (see FIG. 5), and includes a contact portion 10 for connection with another terminal and a core wire 92 (see FIG. 2) constituting an electric wire 90. , And a sheath crimping portion 30 that holds a sheath 93 (see FIG. 2) constituting the electric wire 90.
Further, the plate material 1 includes a plating layer 3 of tin (Sn) plated on the surface of a base material 2 made of copper (Cu) or a copper alloy (see FIG. 5). The plating layer 3 may be formed directly on the surface of the base material 2 or may be formed on a nickel (Ni) base plated on the base material 2. Further, the material of the base material 2 and the material of the plating layer 3 are not limited to the above.

(電線)
図2において、圧着端子100が保持する電線90は、複数の素線91が撚られて形成された芯線92と、芯線92を被覆する被覆93とを具備している。素線91はアルミニウム(Al)またはアルミニウム合金製であるが、本発明はその材質を限定するものではない。また、被覆93の材質も限定するものではない。
(Electrical wire)
In FIG. 2, the electric wire 90 held by the crimp terminal 100 includes a core wire 92 formed by twisting a plurality of strands 91 and a covering 93 covering the core wire 92. The wire 91 is made of aluminum (Al) or an aluminum alloy, but the present invention does not limit the material. Further, the material of the coating 93 is not limited.

(接触部)
図1において、接触部10は箱状に成形され、内部に他の端子との接触に供されるバネ接点11が設けられ、外部には、圧着端子100がコネクタハウジング(図8参照)に挿入された際、位置決めとなるスタビライザー12や抜け止めとなる係止突起13が設けられている。なお、圧着端子100は「雌端子」であるため、接触部10は箱状であるが、本発明はこれに限定されるものではなく、「雄端子」であってもよい。雄端子の場合には、接触部10は棒状(タブ)に成形される。
(Contact part)
In FIG. 1, a contact portion 10 is formed in a box shape, and a spring contact 11 provided for contact with another terminal is provided inside, and a crimp terminal 100 is inserted into a connector housing (see FIG. 8) outside. In this case, there are provided a stabilizer 12 for positioning and a locking projection 13 for retaining. In addition, since the crimp terminal 100 is a “female terminal”, the contact portion 10 has a box shape, but the present invention is not limited to this, and may be a “male terminal”. In the case of a male terminal, the contact portion 10 is formed in a rod shape (tab).

(芯線加締め部)
図1および図3において、芯線加締め部20は、電線90を構成する芯線92を保持する前は、断面略U字状であって、略半円筒状の基底部21と、基底部21の両側縁のそれぞれ延設された加締め片部22とを具備している。そして、加締め片部22の先端縁23に沿って、先端縁23になる程、板厚が段階的に減少する階段状の薄肉範囲24が形成されている。
なお、基底部21と加締め片部22との境界(基底部21の両側縁の位置に同じ)は明瞭に特定されるものではない。また、薄肉範囲24は、加締め片部22の互いに対向する面(以下「加締め片部内面」と称す)22aの反対の面(以下「加締め片部外面」と称す)22bに形成されているが、加締め片部内面22aに形成されてもよい。
さらに、基底部21の小径側の面(以下「基底部内面」と称す)21aと、加締め片部内面22aとには、陥没したセレーション25が形成されている。なお、セレーション25は図示された形態に限定されるものではない。
(Core wire crimping part)
1 and 3, before holding the core wire 92 constituting the electric wire 90, the core wire caulking portion 20 has a substantially U-shaped cross section and a substantially semi-cylindrical base portion 21. A crimping piece 22 is provided on each side edge. Then, along the leading edge 23 of the caulking piece 22, a step-like thin-walled area 24 is formed in which the thickness gradually decreases toward the leading edge 23.
It should be noted that the boundary between the base 21 and the caulking piece 22 (same position on both side edges of the base 21) is not clearly specified. The thinned area 24 is formed on a surface 22b opposite to a surface 22a of the caulking piece 22 (hereinafter, referred to as "inner surface of the caulking piece") 22b. However, it may be formed on the inner surface 22a of the caulking piece portion.
Further, a depressed serration 25 is formed on a surface on the small diameter side of the base 21 (hereinafter referred to as “base inner surface”) 21a and a caulking piece inner surface 22a. The serrations 25 are not limited to the illustrated form.

(薄肉範囲)
図3および図4において、薄肉範囲24は先端縁23に沿って、先端縁23に対して垂直な方向(基底部21に向かう方向に同じ)に距離(以下「薄肉幅」と称す)Lの範囲に形成された階段状である。
そして、加締め片部内面22aに平行な方向を「平行方向」と、加締め片部内面22aに垂直な方向を「垂直方向」とそれぞれ称すと、薄肉範囲24は平行方向の複数の平行部分24pと、垂直方向の複数の垂直部分24vとから構成されている。このとき、平行部分24pの平行方向の距離(隣接する垂直部分24v同士の間隔に同じ。以下「平行部分幅」と称す)は「ΔL」である。
また、薄肉範囲24を除く範囲における加締め片部22の厚さと先端縁23における厚さとの差(以下「薄肉量」と称す)は「H」で、垂直部分24vの高さ(隣接する平行部分24p同士の垂直方向の距離に同じ。以下「垂直段差」と称す)は「ΔH」になっている。
なお、以上は、平行部分24p毎の平行部分幅ΔLが同じで、垂直部分24v毎の垂直段差ΔHが同じになっているが、本発明はこれに限定されるものではなく、平行部分24p毎に平行部分幅ΔLが相違し、垂直部分24v毎に垂直段差ΔHが相違してもよい。また、薄肉幅L、薄肉量Hおよび階段の数(平行部分24pおよび垂直部分24vの数)も限定されるものではない。
(Thin range)
3 and FIG. 4, the thin region 24 has a distance (hereinafter, referred to as “thin width”) L along the leading edge 23 in a direction perpendicular to the leading edge 23 (the same as the direction toward the base 21). It is a step-like shape formed in the range.
When the direction parallel to the caulking piece inner surface 22a is referred to as a “parallel direction” and the direction perpendicular to the caulking piece inner surface 22a is referred to as a “vertical direction”, the thin-walled area 24 includes a plurality of parallel portions in the parallel direction. 24p and a plurality of vertical portions 24v in the vertical direction. At this time, the distance in the parallel direction of the parallel portion 24p (same as the interval between adjacent vertical portions 24v; hereinafter, referred to as “parallel portion width”) is “ΔL”.
The difference between the thickness of the caulked piece portion 22 and the thickness at the leading edge 23 (hereinafter referred to as “thickness amount”) in a range other than the thin thickness range 24 is “H”, and the height of the vertical portion 24v (adjacent parallel The same as the vertical distance between the portions 24p (hereinafter referred to as “vertical step”) is “ΔH”.
In the above description, the parallel portion width ΔL of each parallel portion 24p is the same, and the vertical step ΔH of each vertical portion 24v is the same. However, the present invention is not limited to this. And the vertical step ΔH may be different for each vertical part 24v. Further, the thin width L, the thin thickness H, and the number of steps (the number of the parallel portions 24p and the vertical portions 24v) are not limited.

(被覆加締め部)
図1において、被覆加締め部30は、電線90を構成する被覆93を保持する前は、断面略U字状であって、略半円筒状の被覆基底部31と、被覆基底部31の両側縁のそれぞれ延設された被覆加締め片部32とを具備している。そして、被覆加締め片部32の先端縁33に向かって傾斜するテーパ状の面取り部34が形成されている。
(Coating crimping part)
In FIG. 1, the sheath caulking portion 30 has a substantially U-shaped cross section before holding the sheath 93 constituting the electric wire 90, a substantially semi-cylindrical sheath base 31, and both sides of the sheath base 31. And a cover caulking piece 32 extending from each edge. Further, a tapered chamfered portion 34 inclined toward the leading edge 33 of the cover caulking piece 32 is formed.

(作用効果)
図5および図6は本発明の実施の形態1に係る圧着端子の作用効果を説明するものであって、図5の(a)は製造工程の一部を模式的に示す断面図、図5の(b)は製造工程の一部を拡大して模式的に示す断面図、図6の(a)は比較材における製造工程の一部を模式的に示す断面図、図6の(b)は比較材における製造工程の一部を拡大して模式的に示す断面図である。
(Effects)
5 and 6 illustrate the operation and effect of the crimp terminal according to Embodiment 1 of the present invention. FIG. 5A is a cross-sectional view schematically showing a part of the manufacturing process. (B) is a cross-sectional view schematically showing an enlarged part of the manufacturing process, FIG. 6 (a) is a cross-sectional view schematically showing a part of the manufacturing process in the comparative material, and (b) of FIG. FIG. 4 is a cross-sectional view schematically showing an enlarged part of a manufacturing process for a comparative material.

図5の(a)において、圧着端子100の芯線加締め部20は、打ち抜き金型81によって平面状の板材1を打ち抜き加工して、芯線加締め部20の外郭形状(加締め片部22の先端縁23)を具備する打ち抜き材101を成形した後、打ち抜き材101に対して押圧加工して、薄肉範囲24が成形された押圧材102を成形したものである。
このとき、薄肉範囲24を成形する押圧金型(プレス駒に同じ)82は、薄肉範囲24に対応した階段状の面を具備している。なお、押圧材102はその後に実行される曲げ加工によって、接触部10、芯線加締め部20および被覆加締め部30が成形され、圧着端子100が完成する。
In FIG. 5A, the core wire crimping portion 20 of the crimp terminal 100 is formed by punching a flat plate material 1 using a punching die 81 to form an outer shape of the core wire crimping portion 20 (the crimping piece portion 22). After the punched material 101 having the leading edge 23) is formed, the punched material 101 is pressed to form a pressed material 102 in which the thin region 24 is formed.
At this time, the pressing die (same as a press piece) 82 for forming the thin-walled area 24 has a stepped surface corresponding to the thin-walled area 24. In the pressing member 102, the contact portion 10, the core wire caulking portion 20, and the covering caulking portion 30 are formed by a bending process performed thereafter, and the crimp terminal 100 is completed.

図5の(b)において、段階状の薄肉範囲24が成形される際、母材2は先端縁23に近い程圧縮量は大きくなるから、垂直方向で圧縮されると共に平行方向に伸ばされ、巨視的に剪断変形している。一方、メッキ層3(梨地にして示している)は平行部分24p毎に主に圧縮変形され、各垂直部分24vにおいて主に剪断変形される。
そうすると、各平行部分24pは、上面(押圧金型82に接する面)と下面(母材2との界面)とは平行のまま圧縮され、圧縮変形によるメッキ層3の平行方向への移動は僅かである(正確には、圧縮に伴って、平行部分24pの平行方向の距離は徐々に僅かに増加する)。このため、メッキ層3の表層部が先端縁23に向けて移動することによって発生する先端縁23に手繰り寄せられたように集積した後記「微細メッキ条4(図6の(b)参照)」が発生することがない。
In FIG. 5B, when the step-like thin-walled area 24 is formed, the amount of compression of the base material 2 increases as the base material 2 is closer to the leading edge 23, so that the base material 2 is compressed in the vertical direction and stretched in the parallel direction. Macroscopically sheared. On the other hand, the plating layer 3 (shown as satin) is mainly compressed and deformed for each parallel portion 24p, and is mainly sheared for each vertical portion 24v.
Then, each parallel portion 24p is compressed while the upper surface (the surface in contact with the pressing mold 82) and the lower surface (the interface with the base material 2) are parallel, and the movement of the plating layer 3 in the parallel direction due to the compression deformation is slight. (Accurately, with compression, the parallel distance of the parallel portion 24p gradually increases slightly). For this reason, the fine plating strips 4 (see FIG. 6B) described later are accumulated as if they were dragged by the front edge 23 generated by the movement of the surface layer portion of the plating layer 3 toward the front edge 23. Does not occur.

(比較材)
図6の(a)において、特許文献1に開示された比較材900は、平面状の板材1を打ち抜き加工して、芯線加締め部20の外郭形状(加締め片部22の先端縁23)を具備する打ち抜き材101を成形した後、打ち抜き材101を押圧加工して、先端縁23にテーパ状の傾斜薄肉範囲924が成形された比較押圧材902を成形したものである。
このとき、傾斜薄肉範囲924を成形する比較押圧金型(プレス駒に同じ)982は、テーパ状の傾斜薄肉範囲924に対応したテーパ状の傾斜面を具備している。なお、比較押圧材902はその後に実行される曲げ加工によって、接触部、芯線加締め部および被覆加締め部が成形され、比較材900が完成する(何れも図示しない)。
(Comparative material)
In FIG. 6A, a comparative material 900 disclosed in Patent Literature 1 is obtained by punching a flat plate material 1 and forming an outer shape of the core wire crimping portion 20 (the distal end edge 23 of the crimping piece portion 22). Is formed by pressing the punched material 101 to form a comparative pressing material 902 having a tapered inclined thin-walled area 924 formed at the leading edge 23.
At this time, the comparative pressing mold 982 (same as a press piece) that forms the inclined thin wall region 924 has a tapered inclined surface corresponding to the tapered inclined thin wall region 924. In the comparative pressing material 902, the contact portion, the core wire caulking portion, and the coating caulking portion are formed by a bending process performed thereafter, and the comparative material 900 is completed (none is shown).

図6の(b)において、傾斜薄肉範囲924が成形される際、母材2は先端縁23に近い程圧縮量は大きくなるから、垂直方向で圧縮されると共に平行方向に伸ばされ、巨視的に剪断変形している。
一方、メッキ層3(梨地にして示している)は傾斜薄肉範囲924に沿って伸ばされ、剪断変形される。このとき、メッキ層3の表層部が先端縁23に向けて移動することから、移動したメッキ層3の一部は、先端縁23の端面に手繰り寄せられたように集積して「微細メッキ条4」になる。
In FIG. 6B, when the inclined thin region 924 is formed, the amount of compression of the base material 2 increases as the base material 2 is closer to the leading edge 23, so that the base material 2 is compressed in the vertical direction and stretched in the parallel direction, and is macroscopically. Has been sheared.
On the other hand, the plating layer 3 (shown as a satin finish) is stretched along the inclined thin area 924 and is sheared. At this time, since the surface layer portion of the plating layer 3 moves toward the leading edge 23, a part of the moved plating layer 3 is collected as if dragged to the end surface of the leading edge 23, and the “fine plating strip” is formed. 4 ".

(変形例)
図7は本発明の実施の形態1に係る圧着端子の変形例を説明するものであって、一部を拡大して示す断面図である。
図7において、薄肉範囲24は前記のような階段状に代えて、波状に変更されている。
すなわち、加締め片部外面22bに、先端縁23に沿って、先端縁23に平行で互いに滑らかに繋がった複数の突条24hおよび複数の凹溝24gが形成されている。
このとき、薄肉範囲24の先端縁23からの距離は薄肉幅Lであって、薄肉範囲24を除く位置の加締め片部22の厚さと、薄肉範囲24の先端縁23における厚さとの差は「薄肉量H」である。また、突条24hの頂点と加締め片部内面22aとの距離Thが、先端縁23に近い突条24hになる程減少し、凹溝24gの底と加締め片部内面22aとの距離Tgが、先端縁23に近い凹溝24gになる程減少している。
(Modification)
FIG. 7 illustrates a modified example of the crimp terminal according to Embodiment 1 of the present invention, and is a cross-sectional view showing a partially enlarged view.
In FIG. 7, the thin-walled area 24 is changed into a wavy shape instead of the step shape as described above.
That is, a plurality of ridges 24h and a plurality of concave grooves 24g are formed on the outer surface 22b of the caulking piece portion along the leading edge 23 and parallel to the leading edge 23 and smoothly connected to each other.
At this time, the distance from the leading edge 23 of the thin region 24 is the thin width L, and the difference between the thickness of the caulking piece 22 at a position excluding the thin region 24 and the thickness at the leading edge 23 of the thin region 24 is "Thin wall thickness H". In addition, the distance Th between the apex of the ridge 24h and the inner surface 22a of the caulking piece decreases as the ridge 24h becomes closer to the leading edge 23, and the distance Tg between the bottom of the groove 24g and the inner surface 22a of the caulking piece. Decreases as the concave groove 24g becomes closer to the leading edge 23.

そして、波の波長に相当する距離、すなわち、隣接する突条24hの頂点同士の平行方向の距離および隣接する凹溝24gの底同士の平行方向の距離は、「平行部分幅ΔL」になっている。
また、波の波高に相当する距離、すなわち、隣接する突条24hの頂点同士の垂直方向の距離は「垂直段差ΔH」で、隣接する凹溝24gの底同士の垂直方向の距離は、垂直段差ΔHに同じ「垂直段差ΔG」である。
なお、以上は、突条24h毎および凹溝24g毎で、垂直段差ΔH(垂直段差ΔGに同じ)が同じになっているが、本発明はこれに限定されるものではない。例えば、突条24h毎に平行部分幅ΔLおよび垂直段差ΔHの一方または両方が相違してもよいし、凹溝24g毎に平行部分幅ΔLおよび垂直段差ΔGの一方または両方が相違してもよい。また、薄肉幅L、薄肉量Hおよび波の数(突条24hおよび凹溝24gの数)も限定するものではない。
The distance corresponding to the wavelength of the wave, that is, the distance in the parallel direction between the vertices of the adjacent ridges 24h and the distance in the parallel direction between the bottoms of the adjacent concave grooves 24g is “parallel portion width ΔL”. I have.
The distance corresponding to the wave height of the wave, that is, the vertical distance between the vertices of the adjacent ridges 24h is “vertical step ΔH”, and the vertical distance between the bottoms of the adjacent grooves 24g is the vertical step. It is the same “vertical step ΔG” as ΔH.
In the above description, the vertical step ΔH (same as the vertical step ΔG) is the same for each protrusion 24h and each concave groove 24g, but the present invention is not limited to this. For example, one or both of the parallel portion width ΔL and the vertical step ΔH may be different for each protrusion 24h, or one or both of the parallel portion width ΔL and the vertical step ΔG may be different for each concave groove 24g. . Further, the thin width L, the thin amount H, and the number of waves (the number of the ridges 24h and the concave grooves 24g) are not limited.

(変形例の作用効果)
したがって、波状の薄肉範囲24が押圧加工によって成形される際、母材2は、先端縁23に近い程圧縮量が大きくなるように垂直方向で圧縮されると共に平行方向に伸ばされ、巨視的に剪断変形している。
一方、メッキ層3は圧縮変形および剪断変形され、突条24hの頂点から凹溝24gの底に向かって、またはこれとは反対の方向に向かって移動する。
このとき、特定の凹溝24gの方向に移動したメッキ層3の一部が、隣接する突条24hを乗り越えて隣接する凹溝24gに移動することはなく、同様に、特定の突条24hの方向に移動したメッキ層3の一部が、隣接する凹溝24gを経由して隣接する突条24hに移動することはない。
したがって、メッキ層3の表層部が先端縁23の端面に手繰り寄せられて集積することはなく、微細メッキ条4は発生しない。
(Operation and effect of the modified example)
Accordingly, when the corrugated thin region 24 is formed by pressing, the base material 2 is compressed in the vertical direction and expanded in the parallel direction so that the amount of compression increases as the position is closer to the leading edge 23, and is macroscopically increased. Shear deformation.
On the other hand, the plating layer 3 undergoes compression deformation and shear deformation, and moves from the top of the ridge 24h toward the bottom of the concave groove 24g or in the opposite direction.
At this time, a part of the plating layer 3 that has moved in the direction of the specific groove 24g does not move over the adjacent protrusion 24h and moves to the adjacent groove 24g. A part of the plating layer 3 moved in the direction does not move to the adjacent ridge 24h via the adjacent groove 24g.
Therefore, the surface layer portion of the plating layer 3 is not dragged to the end face of the leading edge 23 and accumulated, and the fine plating strip 4 does not occur.

(使用状況)
図8は本発明の実施の形態1に係る圧着端子の使用状況を説明するものであって、(a)は側面視の断面図、(b)は正面視の断面図である。
図8の(a)および図8の(b)において、コネクタハウジング(以下「ハウジング」と称す)200に圧着端子100が収納されている。
このとき、圧着端子100には電線90が接続され、電線90を構成する芯線92が芯線加締め部20に保持され、電線90を構成する被覆93が被覆加締め部30に保持されている。
(Status of use)
FIGS. 8A and 8B illustrate a usage state of the crimp terminal according to Embodiment 1 of the present invention. FIG. 8A is a cross-sectional view in a side view, and FIG. 8B is a cross-sectional view in a front view.
8A and 8B, a crimp terminal 100 is housed in a connector housing (hereinafter, referred to as “housing”) 200.
At this time, the electric wire 90 is connected to the crimp terminal 100, the core wire 92 constituting the electric wire 90 is held by the core wire crimping portion 20, and the coating 93 forming the electric wire 90 is held by the coating crimping portion 30.

ハウジング200は、互いに平行に配置された複数の端子収納室210を具備し、端子収納室210に圧着端子100が挿入されている。また、ハウジング200の一方の面(図8において上側の面)には、ロックアーム220が設けられ、他方の面(図8において下側の面)にサイドスペーサ230が装着されている。
さらに、一方の端面(図8の(a)において左側の面)に開口し、端子収納室210に連通する端子挿入孔240が設けられ、端子挿入孔240に雄端子のタブ300が挿入されている。
さらに、端子挿入孔240に近い位置にランス250が設けられ、ランス250に圧着端子100の係止突起13が係止している。
The housing 200 includes a plurality of terminal storage chambers 210 arranged in parallel with each other, and the crimp terminals 100 are inserted into the terminal storage chambers 210. A lock arm 220 is provided on one surface (upper surface in FIG. 8) of the housing 200, and a side spacer 230 is mounted on the other surface (lower surface in FIG. 8).
Further, a terminal insertion hole 240 that opens to one end surface (the left side surface in FIG. 8A) and communicates with the terminal storage chamber 210 is provided, and the male terminal tab 300 is inserted into the terminal insertion hole 240. I have.
Further, a lance 250 is provided at a position near the terminal insertion hole 240, and the locking projection 13 of the crimp terminal 100 is locked to the lance 250.

そして、端子挿入孔240を貫通した雄端子のタブ300は、圧着端子100の接触部10(バネ接点11)に接触している。このとき、タブ300と接触部10とは接触点Aにおいて直接接触し、タブ300とバネ接点11とは接触点Bにおいて直接接触しているから、電気的通電性能が担保されている。すなわち、圧着端子100には微細メッキ条4が発生しないから、接触点Aおよび接触点Bに微細メッキ条4が介在することはなく、電気的通電性能に悪影響が生じることはない(図8の(a)参照)。   The tab 300 of the male terminal penetrating the terminal insertion hole 240 is in contact with the contact portion 10 (spring contact 11) of the crimp terminal 100. At this time, since the tab 300 and the contact portion 10 are in direct contact at the contact point A, and the tab 300 and the spring contact 11 are in direct contact at the contact point B, the electrical conduction performance is ensured. That is, since the fine plating strips 4 do not occur in the crimp terminal 100, the fine plating strips 4 do not intervene at the contact points A and B, and the electric conduction performance is not adversely affected (see FIG. 8). (See (a)).

また、端子収納室210同士を仕切る隔壁260には、端子収納室210同士を連通する隔壁孔Cが形成されているが、圧着端子100には微細メッキ条4が発生しないから、隔壁孔Cに微細メッキ条4が侵入することはなく、隣接する端子収納室210に配置された圧着端子100の間で短絡(ショート)が起こることはない(図8の(b)参照)。
[実施の形態2]
図9および図10は本発明の実施の形態2に係る圧着端子の製造方法を説明するものであって、図9は製造工程の一部を模式的に示す断面図、図10は比較材における製造工程の一部を模式的に示す断面図である。なお、実施の形態1と同じ部位については同じ名称および同じ符号を付し、説明を書略する。
The partition wall 260 separating the terminal storage chambers 210 is formed with a partition wall hole C communicating the terminal storage chambers 210 with each other. The fine plating strips 4 do not enter, and no short circuit occurs between the crimp terminals 100 arranged in the adjacent terminal storage chambers 210 (see FIG. 8B).
[Embodiment 2]
9 and 10 illustrate a method for manufacturing a crimp terminal according to Embodiment 2 of the present invention. FIG. 9 is a cross-sectional view schematically illustrating a part of the manufacturing process, and FIG. It is sectional drawing which shows a part of manufacturing process typically. The same parts as those in the first embodiment are denoted by the same names and the same reference numerals, and the description is omitted.

(圧着端子)
図9において、板材1における圧着端子100の芯線加締め部20に相当する部位を、押圧金型(プレス駒に同じ)83によって押圧加工して、加締め片部22の先端縁23から所定の範囲に相当する範囲に階段状の薄肉範囲24を含む凹部28を具備する押圧材103を成形する(第1工程)。このとき、凹部28は、階段状の薄肉範囲24と、テーパ状の傾斜面27と、薄肉範囲24と傾斜面27とを間に成形された平坦範囲26とを有している。
次に、打ち抜き金型84によって、薄肉範囲24(または平坦範囲26の薄肉範囲24に近い位置)において押圧材103を打ち抜き加工して、芯線加締め部20の外郭形状を具備する打ち抜き材104を成形する(第2工程)。そうすると、前記のように、押圧材103の薄肉範囲24には微細メッキ条4が発生しないから、打ち抜き材104は微細メッキ条4を有しない。
そして、打ち抜き材104はその後に実行される曲げ加工によって、接触部10、芯線加締め部20および被覆加締め部30が成形され、圧着端子100が完成するから(図1参照)、圧着端子100は微細メッキ条4を有しない。
(Crimp terminal)
In FIG. 9, a portion corresponding to the core wire crimping portion 20 of the crimp terminal 100 on the plate material 1 is pressed by a pressing die (same as a press piece) 83, and a predetermined portion is formed from the leading edge 23 of the crimping piece portion 22. A pressing member 103 having a concave portion 28 including a stepped thin region 24 in a range corresponding to the range is formed (first step). At this time, the concave portion 28 has a stepped thin region 24, a tapered inclined surface 27, and a flat region 26 formed between the thin region 24 and the inclined surface 27.
Next, the pressing member 103 is punched in the thin region 24 (or a position close to the thin region 24 of the flat region 26) by a punching die 84, and a punch member 104 having the outer shape of the core wire caulking portion 20 is formed. Forming (second step). Then, as described above, the fine plating strips 4 do not occur in the thin region 24 of the pressing member 103, and thus the punched material 104 does not have the fine plating strips 4.
Then, in the punched material 104, the contact portion 10, the core wire crimping portion 20, and the covering crimping portion 30 are formed by a bending process performed thereafter, and the crimp terminal 100 is completed (see FIG. 1). Does not have the fine plating strip 4.

(比較材)
図10において、板材1における比較材900の芯線加締め部20に相当する部位を、押圧金型(プレス駒に同じ)85によって押圧加工して、加締め片部22の先端縁23から所定の範囲に相当する範囲にテーパ状の傾斜薄肉範囲924を含む凹部928を具備する押圧材105を成形する(第1工程)。このとき、凹部928は、テーパ状の傾斜薄肉範囲924と、テーパ状の傾斜面927と、傾斜薄肉範囲924と傾斜面927との間に成形された平坦範囲926とを有している。
次に、打ち抜き金型86によって、傾斜薄肉範囲924の平坦範囲926に近い位置において押圧材105を打ち抜き加工して、芯線加締め部20の外郭形状を具備する打ち抜き材106を成形する(第2工程)。そうすると、押圧材105の凹部928(正確には、傾斜薄肉範囲924と平坦範囲926との隅部)には、前記のように微細メッキ条4が発生するおそれがあるものの、傾斜薄肉範囲924において打ち抜き加工が実行されるから、打ち抜き材106に微細メッキ条4が取り込まれることがない。
そして、打ち抜き材106はその後に実行される曲げ加工によって、接触部、芯線加締め部および被覆加締め部が成形され、比較材900が完成するから(何れも図示しない)、比較材900は微細メッキ条4を有しない。
(Comparative material)
In FIG. 10, a portion corresponding to the core wire caulking portion 20 of the comparative material 900 in the plate material 1 is pressed by a pressing die (same as a press piece) 85, and a predetermined portion is formed from the leading edge 23 of the caulking piece 22. The pressing member 105 including the concave portion 928 including the tapered inclined thin region 924 in a range corresponding to the range is formed (first step). At this time, the concave portion 928 has a tapered inclined thin region 924, a tapered inclined surface 927, and a flat region 926 formed between the inclined thin region 924 and the inclined surface 927.
Next, the pressing member 105 is punched at a position close to the flat region 926 of the inclined thin region 924 by the punching die 86 to form the punched material 106 having the outer shape of the core wire caulking portion 20 (second). Process). Then, although there is a possibility that the fine plating strip 4 may be generated in the concave portion 928 of the pressing member 105 (more precisely, at the corner between the inclined thin-walled area 924 and the flat area 926) as described above, in the inclined thin-walled area 924, Since the punching process is performed, the fine plated strip 4 is not taken into the punched material 106.
The contact portion, the core wire caulking portion, and the cover caulking portion are formed in the punched material 106 by a bending process performed thereafter, and the comparative material 900 is completed (none of them is shown). No plating strip 4 is provided.

(作用効果)
以上のように、本発明は、押圧加工を実行した後、打ち抜き加工を実行するから、仮に、押圧材103の凹部28に微細メッキ条4が発生するおそれがあったとしても、微細メッキ条4が発生するおそれがある位置が取り込まれないように打ち抜くことによって、打ち抜き材104は微細メッキ条4を有しないものになる。同様に、押圧材105の凹部928に微細メッキ条4が発生するおそれがあるとしても、微細メッキ条4が発生するおそれがある位置が取り込まれないように打ち抜くことによって、打ち抜き材106は微細メッキ条4を有しないものになる。
すなわち、従来のように、打ち抜き加工を実行した後に押圧加工を実行したのでは、テーパ状の傾斜薄肉範囲924を具備する比較材900には、微細メッキ条4が生じるおそれがあるものの、本発明によると、比較材900であっても、微細メッキ条4を有しないものにすることが可能になる。
(Effects)
As described above, according to the present invention, since the punching process is performed after the pressing process is performed, even if the fine plated strips 4 may be generated in the concave portions 28 of the pressing member 103, the fine plated strips 4 may be formed. The punched material 104 does not have the fine plating strips 4 by punching out so as not to take in a position where there is a possibility that a crack may occur. Similarly, even if there is a possibility that the fine plating strips 4 may be generated in the concave portion 928 of the pressing member 105, the punching material 106 is formed by punching so as not to take in a position where the fine plating strips 4 may be generated. It does not have Article 4.
That is, when the pressing process is performed after the punching process is performed as in the related art, the comparative material 900 having the tapered inclined thin-walled area 924 may have the fine plated strip 4, but the present invention does not. According to this, even the comparative material 900 can be made without the fine plating strip 4.

以上、本発明を実施の形態をもとに説明した。この実施の形態は例示であり、それらの各構成要素及びその組合せにいろいろな変形例が可能なこと、またそうした変形例も本発明の範囲にあることは当業者に理解されるところである。   The present invention has been described based on the embodiments. This embodiment is an exemplification, and it will be understood by those skilled in the art that various modifications can be made to the respective components and combinations thereof, and that such modifications are also within the scope of the present invention.

本発明は以上であるから、各種雌圧着端子および各種雄圧着端子としておよびそれらの製造方法として広く利用することができる。   As described above, the present invention can be widely used as various female crimp terminals and various male crimp terminals and as a method for producing them.

1 :板材
2 :母材
3 :メッキ層
4 :微細メッキ条
10 :接触部
11 :バネ接点
12 :スタビライザー
13 :係止突起
20 :芯線加締め部
21 :基底部
21a:基底部内面
22 :加締め片部
22a:加締め片部内面
22b:加締め片部外面
23 :先端縁
24 :薄肉範囲
24g:凹溝
24h:突条
24p:平行部分
24v:垂直部分
25 :セレーション
26 :平坦範囲
27 :傾斜面
28 :凹部
30 :被覆加締め部
31 :被覆基底部
32 :被覆加締め片部
33 :先端縁
34 :面取り部
81 :打ち抜き金型
82 :押圧金型
83 :押圧金型
84 :打ち抜き金型
85 :押圧金型
86 :打ち抜き金型
90 :電線
91 :素線
92 :芯線
93 :被覆
100:圧着端子
101:打ち抜き材
102:押圧材
103:押圧材
104:打ち抜き材
105:押圧材
106:打ち抜き材
200:ハウジング
210:端子収納室
220:ロックアーム
230:サイドスペーサ
240:端子挿入孔
250:ランス
260:隔壁
300:タブ
900:比較材
902:比較押圧材
924:傾斜薄肉範囲
926:平坦範囲
927:傾斜面
928:凹部
982:比較押圧金型
A :接触点
B :接触点
C :隔壁孔
H :薄肉量
L :薄肉幅
Tg:距離
Th:距離
ΔG:垂直段差
ΔH:垂直段差
ΔL:平行部分幅
1: Plate material 2: Base material 3: Plating layer 4: Fine plating strip 10: Contact portion 11: Spring contact 12: Stabilizer 13: Locking projection 20: Core wire crimping portion 21: Base portion 21a: Base portion inner surface 22: Addition Clamping piece portion 22a: Caulking piece portion inner surface 22b: Caulking piece portion outer surface 23: Tip edge 24: Thin region 24g: Concave groove 24h: Ridge 24p: Parallel portion 24v: Vertical portion 25: Serration 26: Flat region 27: Inclined surface 28: Depressed portion 30: Coated crimping portion 31: Coated base portion 32: Coated crimping piece 33: Tip edge 34: Chamfered portion 81: Punching die 82: Pressing die 83: Pressing die 84: Punching die Mold 85: Pressing die 86: Punching die 90: Electric wire 91: Element wire 92: Core wire 93: Coating 100: Crimp terminal 101: Pressing material 102: Pressing material 103: Pressing material 104: Punching 105: Pressing material 106: Stamping material 200: Housing 210: Terminal storage chamber 220: Lock arm 230: Side spacer 240: Terminal insertion hole 250: Lance 260: Partition wall 300: Tab 900: Comparative material 902: Comparative pressing material 924: Incline Thin area 926: Flat area 927: Inclined surface 928: Recess 982: Comparative pressing mold A: Contact point B: Contact point C: Partition hole H: Thin wall thickness L: Thin wall width Tg: Distance Th: Distance ΔG: Vertical step ΔH : Vertical step ΔL: Parallel part width

Claims (3)

複数の素線からなる芯線を具備する電線の前記芯線を保持する芯線加締め部を有する圧着端子の製造方法であって、
前記芯線加締め部は、基底部と前記基底部の両側縁にそれぞれ延設された加締め片部とを具備し、
前記加締め片部の先端縁から所定の範囲に、前記先端縁に近くなる程、板厚が段階的に減少する階段状の薄肉範囲または板厚が徐々に減少するテーパ状の薄肉範囲が成形され、
母材およびメッキ層を具備する板材を押圧加工して、前記加締め片部の先端縁から所定の範囲に相当する範囲に前記薄肉範囲を具備する押圧材を成形する第1工程と、
前記押圧材を打ち抜き加工して、前記芯線加締め部の外郭形状を具備する打ち抜き材を成形する第2工程とを有することを特徴とする圧着端子の製造方法。
A method for manufacturing a crimp terminal having a core crimping portion for holding the core of an electric wire having a core consisting of a plurality of strands,
The core wire caulking portion includes a base portion and a caulking piece portion respectively extended on both side edges of the base portion,
A stepped thin-walled area in which the thickness gradually decreases or a tapered thin-walled area in which the thickness gradually decreases is formed in a predetermined range from the leading edge of the caulking piece portion as the closer to the leading edge. And
A first step of pressing a plate material having a base material and a plating layer to form a pressing material having the thin-walled area in a range corresponding to a predetermined range from a leading edge of the caulking piece portion,
A second step of punching the pressing material to form a punching material having an outer shape of the core wire crimping portion.
複数の素線からなる芯線を具備する電線の前記芯線を保持する芯線加締め部を有する圧着端子の製造方法であって、
前記芯線加締め部は、基底部と前記基底部の両側縁にそれぞれ延設された加締め片部とを具備し、
前記加締め片部の一方の面で前記加締め片部の先端縁から所定の範囲に、前記加締め片部の先端縁に沿って、前記先端縁に平行な複数の突条および複数の凹溝を具備する薄肉範囲が成形され、前記突条の頂点と前記加締め片部の他方の面との距離が前記先端縁に近くなる程減少し、前記凹溝の底と前記加締め片部の他方の面との距離が前記先端縁に近くなる程減少し、
母材およびメッキ層を具備する板材の前記加締め片部の先端縁から所定の範囲に相当する範囲を押圧加工して、前記薄肉範囲を具備する押圧材を成形する第1工程と、
前記押圧材を打ち抜き加工して、前記芯線加締め部の外郭形状を具備する打ち抜き材を成形する第2工程とを有することを特徴とする圧着端子の製造方法。
A method for manufacturing a crimp terminal having a core crimping portion for holding the core of an electric wire having a core consisting of a plurality of strands,
The core wire caulking portion includes a base portion and a caulking piece portion respectively extended on both side edges of the base portion,
A plurality of ridges and a plurality of recesses parallel to the leading edge along the leading edge of the crimping piece portion within a predetermined range from the leading edge of the crimping piece portion on one surface of the crimping piece portion. A thin-walled area having a groove is formed, and the distance between the apex of the ridge and the other surface of the caulking piece decreases as the distance from the tip edge decreases, and the bottom of the concave groove and the caulking piece Decreases as the distance to the other surface of the surface becomes closer to the leading edge,
A first step of pressing a range corresponding to a predetermined range from the leading edge of the caulking piece portion of the plate material including the base material and the plating layer to form a pressing material having the thin-walled range;
A second step of punching the pressing material to form a punching material having an outer shape of the core wire crimping portion.
前記母材は、銅または銅合金であって、
前記メッキ層は、前記母材にメッキされた錫または前記母材にメッキされたニッケル下地にメッキされた錫であることを特徴とする請求項1または2記載の圧着端子の製造方法。
The base material is copper or a copper alloy,
3. The method according to claim 1, wherein the plating layer is tin plated on the base material or tin plated on a nickel base plated on the base material. 4.
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