JP6768250B2 - Press-fit terminal manufacturing equipment and press-fit terminal manufacturing method - Google Patents

Press-fit terminal manufacturing equipment and press-fit terminal manufacturing method Download PDF

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JP6768250B2
JP6768250B2 JP2018126151A JP2018126151A JP6768250B2 JP 6768250 B2 JP6768250 B2 JP 6768250B2 JP 2018126151 A JP2018126151 A JP 2018126151A JP 2018126151 A JP2018126151 A JP 2018126151A JP 6768250 B2 JP6768250 B2 JP 6768250B2
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義幸 伏見
義幸 伏見
健 兵庫
健 兵庫
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三晶エムイーシー株式会社
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Description

本発明は、プリント基板やコネクタハウジングのスルーホールに圧入されるプレスフィット部分を備えるプレスフィット端子の製造装置及び製造方法に関するものである。 The present invention relates to a press-fit terminal manufacturing apparatus and a manufacturing method including a press-fit portion that is press-fitted into a through hole of a printed circuit board or a connector housing.

プレスフィット端子やその製造方法は、スルーホールにおける支持安定性及び接触安定性を高めるために案出され、その形態や製造方法は、以下の如く多数紹介されている。 Press-fit terminals and their manufacturing methods have been devised in order to improve support stability and contact stability in through-holes, and many forms and manufacturing methods thereof have been introduced as follows.

例えば、下記特許文献1又は下記特許文献2に記載の技術は、プレスフィット端子の両端部の先細り状の挿入部と、基板に半田付けされる半田付け部と、相手端子と接続される接続部とが順に長さ方向に連設された基板用端子を製造する方法であって、板厚よりも板幅が大きな角状線材をプレスして前記挿入部を形成し、この挿入部と連設した部分を板幅方向の両側からカッティング又はプレス加工して角状線材の板幅よりも小さな幅の前記半田付け部(拡幅部分)を形成する基板用端子の製造方法である。その際、下記特許文献1に記載の技術は、前記挿入部のプレス成形と同時に、前記角状線材の接続部形成部位に凹み部を形成する手法を採ることができるものである。 For example, the techniques described in Patent Document 1 or Patent Document 2 below include tapered insertion portions at both ends of a press-fit terminal, a soldering portion soldered to a substrate, and a connection portion connected to a mating terminal. Is a method of manufacturing board terminals that are connected in order in the length direction. A square wire having a plate width larger than the plate thickness is pressed to form the insertion portion, and the insertion portion is connected to the insertion portion. This is a method for manufacturing a substrate terminal for forming the soldered portion (widened portion) having a width smaller than the plate width of a square wire rod by cutting or pressing the formed portion from both sides in the plate width direction. At that time, the technique described in Patent Document 1 below can adopt a method of forming a recessed portion at a connecting portion forming portion of the square wire rod at the same time as press molding of the insertion portion.

また、下記特許文献3に記載の技術は、スルーホールの内径寸法よりも大きな幅寸法を有する両側縁部を切断することにより、前記スルーホールの内径寸法よりも小さな幅寸法とされた先端挿入部を形成する一端部切断工程と、前記先端挿入部から所定寸法に亘る領域において、前記金属角線材の幅方向中央部分を板厚方向に打ち抜いて貫通穴を設けると共に、該貫通穴を挟んで前記幅方向の両側に残された前記金属角線材の両側縁部により、撓み変形可能な一対の弾性接触部を構成して前記基板圧入部を形成する基板圧入部形成工程を含むものである。 Further, the technique described in Patent Document 3 below has a tip insertion portion having a width dimension smaller than the inner diameter dimension of the through hole by cutting both side edge portions having a width dimension larger than the inner diameter dimension of the through hole. In the step of cutting one end to form the metal square wire and in the region extending from the tip insertion portion to a predetermined dimension, the central portion of the metal square wire in the width direction is punched out in the plate thickness direction to provide a through hole, and the through hole is sandwiched between the through holes. This includes a substrate press-fitting portion forming step of forming a pair of elastic contact portions that can be flexed and deformed by the both side edges of the metal square wire material left on both sides in the width direction to form the substrate press-fitting portion.

更に、下記特許文献4には、プレスフィット端子を、金属板材からのプレス打ち抜き加工によって製造することも可能であるが、金属線材から潰し加工と切断により成形することが望ましいと記載され、プレスフィット端子の先端部と末端部とを連結する絞り部を形成する手法として、金属線材にプレスによる絞り加工を行うことが記載されている。 Further, Patent Document 4 below describes that the press-fit terminal can be manufactured by press punching from a metal plate, but it is desirable to form the press-fit terminal by crushing and cutting from a metal wire. As a method of forming a drawing portion that connects the tip end portion and the end portion of the terminal, it is described that the metal wire is drawn by pressing.

特開2000−030834号公報JP-A-2000-030834 特開2012−174400号公報Japanese Unexamined Patent Publication No. 2012-174400 特開2014−149956号公報Japanese Unexamined Patent Publication No. 2014-149965 実用新案登録第3199961号公報Utility Model Registration No. 3199961

スルーホールにおける支持安定性及び接触安定性について、より良い性状を持つ形態を決定する際には、種々の形態について分析や解析を伴う実証実験を重ねる必要がある。
その様に実証実験のサンプルを製造し、又は商品としてのプレスフィット端子を製造するには、形態を再現できる能力の高い製造装置や製造方法が必要となる。
When determining a morphology having better properties for support stability and contact stability in a through hole, it is necessary to repeat empirical experiments involving analysis and analysis for various morphologies.
In order to manufacture a sample of such a demonstration experiment or to manufacture a press-fit terminal as a commercial product, a manufacturing device and a manufacturing method having a high ability to reproduce the form are required.

しかしながら、上記従来の手法の様に、所定形状の製品を得ることを目的として、抜き打ち加工、穴あけ加工、せん断加工、縁取り加工、縁仕上げ加工、曲げ加工又は絞り加工などからなる必要な工程をただ単純に実施していたのでは、金属の塑性変形の際、製品に当たり傷やバリが発生し、プレスフィット端子について、所望の形態や品質を均一に得ることができず、各工程の内容によっては、製造効率が悪いという問題がある。 However, like the above-mentioned conventional method, for the purpose of obtaining a product having a predetermined shape, the necessary steps including punching, drilling, shearing, edging, edge finishing, bending or drawing are simply performed. If it was simply carried out, when the metal was plastically deformed, scratches and burrs would occur on the product, and it would not be possible to uniformly obtain the desired form and quality of the press-fit terminal, depending on the content of each process. , There is a problem that manufacturing efficiency is poor.

本発明は、上記実情に鑑みてなされたものであり、所望の形態や品質を均一に再現することができるプレスフィット端子の製造装置及び製造方法の提供を目的とする。 The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a press-fit terminal manufacturing apparatus and manufacturing method capable of uniformly reproducing a desired form and quality.

上記課題を解決するためになされた本発明によるプレスフィット端子の製造装置は、均一な断面形状の導電性線材を一定間隔で順送し複数工程で成形する(単数又は複数の)金型を備え、前記金型は、先細りの端部を形成する端部形成部と、支持孔に保持される挿入部を形成する挿入部形成部が一列に配置され、前記挿入部形成部は、前記挿入部の容積より広い拡幅空洞と、前記挿入部の容積と略等しい成形空洞を備えることを特徴とする。 The press-fit terminal manufacturing apparatus according to the present invention, which has been made to solve the above problems, includes a mold (s) for forming conductive wires having a uniform cross-sectional shape in a plurality of steps by sequentially feeding them at regular intervals. In the mold, an end forming portion forming a tapered end portion and an insertion portion forming portion forming an insertion portion held in a support hole are arranged in a row, and the insertion portion forming portion is the insertion portion. It is characterized by including a widening cavity wider than the volume of the insertion portion and a molding cavity substantially equal to the volume of the insertion portion.

前記拡幅空洞は、導電性線材の表面に前記金型のアンカーコア(拡幅の起点を定める機能を備えるコア)が嵌る凹部を形成する圧印空洞と、前記圧印空洞の後段に配置され前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し空洞からなる構成とすることができる。
前記成形空洞は、前記拡幅空洞の後段に配置され前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し空洞を備える構成とすることができる。
The widening cavity includes a forging cavity that forms a recess in which the anchor core of the die (a core having a function of determining the starting point of widening) fits on the surface of the conductive wire, and the anchor core that is arranged after the forking cavity. It can be composed of an embossed cavity that widens the conductive wire rod toward the outside of the fitted recess.
The molded cavity may be configured to include an embossed cavity that is arranged after the widening cavity and widens the conductive wire rod toward the outside of the recess in which the anchor core is fitted.

上記課題を解決するためになされた本発明によるプレスフィット端子の製造方法は、先細りの端部を形成する端部形成工程と、支持孔に保持される挿入部を形成する挿入部形成工程を含み、均一な断面形状の導電性線材から一列に連結した複数のプレスフィット端子を製造する方法であって、前記挿入部形成工程は、挿入部を複数段階で形成する順送式形成工程であって、前記挿入部の容積より広い空洞による拡幅工程と、前記挿入部の容積と略等しい空洞による成形工程を経ることを特徴とする。 The method for manufacturing a press-fit terminal according to the present invention, which has been made to solve the above problems, includes an end portion forming step of forming a tapered end portion and an insertion portion forming step of forming an insertion portion held in a support hole. , A method of manufacturing a plurality of press-fit terminals connected in a row from conductive wires having a uniform cross-sectional shape, and the insertion portion forming step is a progressive forming step of forming an insertion portion in a plurality of stages. It is characterized by undergoing a widening step with a cavity wider than the volume of the insertion portion and a molding step with a cavity substantially equal to the volume of the insertion portion.

前記拡幅工程は、導電性線材の表面に後の工程において金型のアンカーコアが嵌る凹部を形成する圧印工程と、前記圧印工程の後段において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を経るものとすることができる。
前記成形工程は、前記拡幅工程の後段において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を経るものとすることができる。
The widening step includes a stamping step of forming a recess on the surface of the conductive wire rod into which the anchor core of the mold fits in a later step, and a conductive step toward the outside of the recess in which the anchor core fits in the subsequent stage of the stamping step. It is possible to go through an embossing process for widening the sex wire.
The molding step may go through an embossing step of widening the conductive wire rod toward the outside of the recess in which the anchor core is fitted in the subsequent stage of the widening step.

本発明によるプレスフィット端子の製造装置及び製造方法によれば、一列に連結した複数のプレスフィット端子を得る際に、前記挿入部形成工程について、挿入部を複数段階で形成する順送式形を採用し、前記挿入部の容積より広い空洞による拡幅工程と、前記挿入部の容積と略等しい空洞による成形工程を経ることによって、すべての成形工程を単一工程で行う手法と比して遜色のない製造効率を得つつ、初期コスト、中間コスト又は仕様変更コストの節約、仕様変更に対する便宜の向上及び食み肉(バリ)や当たり傷が減少することなどに伴う歩留まり及び成形精度の向上など、多くの面で有利にプレスフィット端子の製造を行うことができる。 According to the press-fit terminal manufacturing apparatus and manufacturing method according to the present invention, when obtaining a plurality of press-fit terminals connected in a row, in the insertion portion forming step, a progressive type in which the insertion portion is formed in a plurality of stages is provided. By adopting and undergoing a widening process with a cavity wider than the volume of the insertion part and a molding process with a cavity approximately equal to the volume of the insertion part, it is inferior to the method in which all the molding processes are performed in a single process. While obtaining no manufacturing efficiency, saving initial cost, intermediate cost or specification change cost, improving convenience for specification change and improving yield and molding accuracy due to reduction of meat (burrs) and hit scratches, etc. Press-fit terminals can be manufactured advantageously in many respects.

また、前記拡幅工程では、前記導電性線材の表面に後の拡幅工程においてアンカーコアが嵌る凹部を形成する圧印工程と、圧印空洞の後段の拡幅空洞内において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を経ることによって、当たり傷が減少することはもとより、型押し工程による塑性変形の方向性が定まり、当たり傷などの原因となる不要な加圧の回避によって品質向上に寄与する。 Further, in the widening step, a pressing step of forming a recess on the surface of the conductive wire rod into which the anchor core fits in the subsequent widening step and an outer side of the recess in which the anchor core fits in the widening cavity in the subsequent stage of the stamping cavity. By going through the embossing process of widening the conductive wire rod, not only the hitting scratches are reduced, but also the direction of plastic deformation by the embossing process is determined, and unnecessary pressurization that causes hitting scratches etc. is performed. Contribute to quality improvement by avoiding.

更に、前記成形工程についても、当該成形空洞内において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を採用すれば、当該成形工程において線材に対する圧力調整や、線材を経た金型に対する圧力調整が容易となり、挿入部の形成に際して、プレスフィット端子の接圧や挿抜力を配慮したより精密な形態調整及び再現を行うことができる。 Further, as for the molding step, if an embossing step of widening the conductive wire rod toward the outside of the recess in which the anchor core is fitted is adopted in the molding cavity, pressure adjustment on the wire rod can be performed in the molding step. The pressure of the mold passed through the wire can be easily adjusted, and more precise shape adjustment and reproduction can be performed in consideration of the contact pressure and insertion / extraction force of the press-fit terminal when forming the insertion portion.

本発明によるプレスフィット端子の製造装置の一例を示す概略図である。It is the schematic which shows an example of the manufacturing apparatus of the press-fit terminal by this invention. 本発明によるプレスフィット端子の製造方法で行われる製造工程の一例を示す工程図である。It is a process drawing which shows an example of the manufacturing process performed by the manufacturing method of the press-fit terminal by this invention. 本発明によるプレスフィット端子の製造方法で加工される線材の形態推移を例示する説明図である。It is explanatory drawing which illustrates the morphological transition of the wire rod processed by the manufacturing method of the press-fit terminal by this invention. 本発明によるプレスフィット端子の製造方法における挿入部形成工程での線材の形態推移を例示する説明図である。It is explanatory drawing which illustrates the morphological transition of the wire rod in the insertion part forming process in the manufacturing method of the press-fit terminal by this invention. 本発明によるプレスフィット端子の製造方法における挿入部形成工程での線材の変形情況を例示する説明図である。It is explanatory drawing which illustrates the deformation situation of the wire rod in the insertion part forming process in the manufacturing method of the press-fit terminal by this invention. 本発明によるプレスフィット端子の製造方法で用いられる金型の一例を示す概略図である。It is the schematic which shows an example of the mold used in the manufacturing method of the press-fit terminal by this invention.

以下、本発明によるプレスフィット端子の製造方法の実施の形態を、プレスフィット端子の製造装置(以下「製造装置」という)と共に、図面に基づき詳細に説明する。
図1に示す製造装置は、均一な断面形状の導電性線材(以下「線材L」という)から、先端部1、挿入部2及び終端部3を具備する複数のプレスフィット端子mを、前記終端部3及び先端部1を介して連結した線条(以下「連鎖部品M」という)として成形するものである(図3参照)。
Hereinafter, embodiments of the method for manufacturing a press-fit terminal according to the present invention will be described in detail together with a press-fit terminal manufacturing apparatus (hereinafter referred to as “manufacturing apparatus”) based on drawings.
The manufacturing apparatus shown in FIG. 1 uses a conductive wire rod having a uniform cross-sectional shape (hereinafter referred to as “wire rod L”) to terminate a plurality of press-fit terminals m having a tip portion 1, an insertion portion 2 and a terminal portion 3. It is formed as a line (hereinafter referred to as "chain component M") connected via a portion 3 and a tip portion 1 (see FIG. 3).

この例は、線材Lを送り出す送り出しリールAと、プレスフィット端子mの連鎖部品Mとしての形に整える成形装置Bと、前記送り出しリールAから線材Lを引き出すと共に、前記成形装置Bの定位置に確実にセットする線材ガイド(図示省略)と、前記成形装置Bで製造された連鎖部品Mを巻き取る巻き取りリールCとで構成される。 In this example, a delivery reel A that feeds out the wire rod L, a molding apparatus B that shapes the press-fit terminal m as a chain component M, and a wire rod L that is pulled out from the delivery reel A and placed in a fixed position of the molding apparatus B. It is composed of a wire guide (not shown) that is securely set and a take-up reel C that winds up the chain component M manufactured by the molding apparatus B.

前記成形装置Bは、上型4と、下型5と、前記上型4及び下型5を開閉させるアクチュエータ(図示省略)を備える。
前記上型4と前記下型5は、前記線材Lが嵌る支持部7と、当該支持部7に続いて前記上型4と前記下型5の型締めによって形成される空洞6を取り囲むキャビティ4a,5aと、各キャビティ4a,5aの中央部において上型4及び下型5の一部として空洞6側へ突出するコア4b,5bからなる。
前記上型4及び下型5は、前記線材Lから複数回のプレス加工を経て前記連鎖部品Mを成形するものであって、各工程で用いるキャビティ4a,5a及びコア4b,5bを前記線材Lの引出長間隔で直線的に、且つ一列に配置する形で備える(図1及び図4参照)。
The molding apparatus B includes an upper mold 4, a lower mold 5, and an actuator (not shown) for opening and closing the upper mold 4 and the lower mold 5.
The upper mold 4 and the lower mold 5 have a cavity 4a that surrounds a support portion 7 into which the wire rod L is fitted and a cavity 6 formed by molding the upper mold 4 and the lower mold 5 following the support portion 7. , 5a, and cores 4b and 5b protruding toward the cavity 6 as a part of the upper die 4 and the lower die 5 at the central portion of each of the cavities 4a and 5a.
The upper die 4 and the lower die 5 form the chain component M from the wire rod L through a plurality of press workings, and the cavities 4a, 5a and cores 4b, 5b used in each step are formed of the wire rod L. It is provided in a form of being arranged linearly and in a line at intervals of the drawer lengths (see FIGS. 1 and 4).

この例は、均一な方形断面形状の線材Lにプレス成型を行い、先細りの前記先端部1及び終端部3を形成する端部形成工程と、コネクタや回路基板の支持孔に保持される挿入部2を形成する挿入部形成工程を含む。 In this example, a wire rod L having a uniform square cross-sectional shape is press-molded to form the tapered tip portion 1 and end portion 3, and an end portion forming step and an insertion portion held in a support hole of a connector or a circuit board. The insertion portion forming step of forming 2 is included.

この例の前記端部形成工程は、前記先端部1と前記終端部3を、プレス成形からなる単一工程で形成する。ただし、必要に応じて、面取り工程など更なる工程を加えた複数の工程を付設してもよい。
前記挿入部形成工程は、挿入部2を複数段階で形成する順送式形成工程であって、前記挿入部2の容積より広い空洞による拡幅工程と、前記挿入部2の容積と略等しい空洞による成形工程を経る。
尚、ここで拡幅工程とは、材料の一部又は全部に対して加圧による偏平化を行い、それに伴い余分となった体積を加圧方向とは異なる側へ逃すことによって、当該逃し方向への幅を広げる工程である。
In the end portion forming step of this example, the tip portion 1 and the end portion 3 are formed by a single step consisting of press molding. However, if necessary, a plurality of steps including a chamfering step and other steps may be added.
The insertion portion forming step is a progressive forming step of forming the insertion portion 2 in a plurality of stages, and is composed of a widening step by a cavity wider than the volume of the insertion portion 2 and a cavity substantially equal to the volume of the insertion portion 2. Go through the molding process.
Here, in the widening step, a part or all of the material is flattened by pressurization, and the excess volume is released to a side different from the pressurizing direction, thereby moving in the relief direction. It is a process to widen the width of.

前記拡幅工程は、線材Lの表面に、後の工程においてアンカーコア4b(4c),5b(5c)が嵌る凹部2aを形成する圧印工程と、前記圧印工程の後段において前記アンカーコア4b(4c),5b(5c)が嵌った凹部2aの外側(この例では側方)に向けて前記線材Lを拡幅する型押し工程を経る(図5並びに図4(B)から図4(D)参照)。
前記成形工程は、前記拡幅工程の後段において前記アンカーコア4b(4c),5b(5c)が嵌った凹部2aの外側(この例では側方)に向けて前記線材Lを拡幅すると共に、当該拡幅量を当該成形空洞6eを取り囲むキャビティ4a,5aの内壁面で押し止める型押し工程を経る(図4(E)参照)。
The widening step includes a stamping step of forming a recess 2a on the surface of the wire rod L into which the anchor cores 4b (4c) and 5b (5c) fit in a later step, and the anchor core 4b (4c) in the subsequent step of the stamping step. , 5b (5c) is fitted into the recess 2a, which is subjected to an embossing step of widening the wire rod L toward the outside (side in this example) (see FIGS. 5 and 4 (B) to 4 (D)). ..
In the molding step, the wire rod L is widened toward the outside (side in this example) of the recess 2a into which the anchor cores 4b (4c) and 5b (5c) are fitted in the subsequent stage of the widening step, and the wire rod L is widened. The amount is pressed by the inner wall surfaces of the cavities 4a and 5a surrounding the molding cavity 6e (see FIG. 4E).

前記製造工程を採る際に用いられる金型は、先細りの端部1,3を形成する端部形成部Bn(b1)と、前記コネクタや回路基板の支持孔に保持される挿入部2を形成する挿入部形成部Bwを備える。
この例は、前記端部形成部Bnとして、線材Lを一定間隔で所定形状に絞る単一の金型b1を備えると共に、前記挿入部形成部Bwとして、前記挿入部2の設定容積より広い拡幅空洞6a〜6dを備える四つの金型(第一形成部b2〜第四形成部b5)と、前記挿入部2の容積と略等しい成形空洞6eを備える単一の金型(第五形成部b6)を備える。
これらの金型は、所定のフレームに直線的に一列に配置され(図1又は図4参照)、組み合わされた単一の上型4又は下型5として型締めが行われる。
尚、各端部形成部Bn及び挿入部形成部Bwを構成する各金型を、一方向から順に個別に型締めを行うこともできる。
The mold used in the manufacturing process forms an end forming portion Bn (b1) forming the tapered ends 1 and 3 and an insertion portion 2 held in a support hole of the connector or the circuit board. An insertion portion forming portion Bw to be formed is provided.
In this example, the end forming portion Bn includes a single mold b1 that narrows the wire rod L into a predetermined shape at regular intervals, and the inserting portion forming portion Bw has a wider width than the set volume of the inserting portion 2. A single mold (fifth forming portion b6) having four molds (first forming portion b2 to fourth forming portion b5) having cavities 6a to 6d and a molding cavity 6e having a volume substantially equal to the volume of the insertion portion 2. ) Is provided.
These molds are arranged linearly in a row on a predetermined frame (see FIG. 1 or 4) and are molded as a single combined upper mold 4 or lower mold 5.
It is also possible to individually fasten each mold constituting each end forming portion Bn and the insertion portion forming portion Bw in order from one direction.

前記拡幅空洞は、線材Lの表面にその後段においてアンカーコア4b(4c),5b(5c)が嵌る凹部2aを形成する圧印空洞6aと、前記圧印空洞6aの後段に配置され、前記アンカーコア4b(4c),5b(5c)が嵌った凹部2aの外側(この例では側方)に向けて前記線材Lを拡幅する(図5参照)型押し空洞6b〜6dからなる(図4参照)。
前記成形空洞は、前記拡幅空洞の後段に配置され、型締めの際の加圧によって前記アンカーコア4b(4c),5b(5c)が嵌った凹部2aの外側(この例では側方)に向けて前記線材Lを拡幅すると共に、当該拡幅量を当該成形空洞を取り囲むキャビティ4a,5aの内壁面で押し止める型押し空洞6eである。
The widening cavity is arranged in the imprint cavity 6a forming a recess 2a in which the anchor cores 4b (4c) and 5b (5c) are fitted in the subsequent stage on the surface of the wire rod L, and the imprint cavity 6a in the subsequent stage, and is arranged in the rear stage of the anchor core 4b. The wire rod L is widened toward the outside (side in this example) of the recess 2a into which (4c) and 5b (5c) are fitted (see FIG. 5), and consists of embossed cavities 6b to 6d (see FIG. 4).
The molding cavity is arranged after the widening cavity, and is directed to the outside (lateral in this example) of the recess 2a into which the anchor cores 4b (4c) and 5b (5c) are fitted by pressurization during molding. This is an embossed cavity 6e that widens the wire rod L and presses the widened amount on the inner wall surfaces of the cavities 4a and 5a surrounding the molded cavity.

この例の端部形成部Bn(b1)は、型締めによって、長短二つの四角錘が各々の頂部で連結した形態の空洞を形作る上下一対の金型を備える。
一方、この例の挿入部形成部Bwは、送り出し方向から巻き取り方向へ順に配置された第一形成部b2乃至第五形成部b6からなる。
The end forming portion Bn (b1) of this example includes a pair of upper and lower molds that form a cavity in which two long and short square pyramids are connected at the tops of each by molding.
On the other hand, the insertion portion forming portion Bw of this example includes the first forming portion b2 to the fifth forming portion b6 arranged in order from the feeding direction to the winding direction.

前記第一形成部b2及び第二形成部b3は、圧印空洞であり且つ拡幅空洞でもあり得る空洞6a,6bを備える。
即ち、前記第一形成部b2及び第二形成部b3は、前記線材Lの厚みと略等しい略均一な高さを持ち、当該線材Lの体積より十分に大きな容積を持つ丸みを帯びた直方体形状の空洞6であって、上型4のキャビティ4aと下型5のキャビティ5aの中央から、各々コア4b,5bが相対向して突出し、当該空洞6の中央に配置された線材Lの表面及び裏面に前記凹部2aを形成(圧印)し、且つそれによって生じた拡幅量を予備空間8で吸収できる空洞6a,6bを形作る。
前記コア4b,5bは、楕円状又は角に丸みを帯びた方形状の断面を持つ棒状の金属塊であり、当該金型のキャビティ4a,5aの中央に嵌合されることにより一体化されている。
The first forming portion b2 and the second forming portion b3 include cavities 6a and 6b that are both imprinted cavities and can be widened cavities.
That is, the first forming portion b2 and the second forming portion b3 have a substantially uniform height substantially equal to the thickness of the wire rod L, and have a rounded rectangular parallelepiped shape having a volume sufficiently larger than the volume of the wire rod L. The cores 4b and 5b protrude from the center of the cavity 4a of the upper mold 4 and the cavity 5a of the lower mold 5 so as to face each other, and the surface of the wire rod L arranged in the center of the cavity 6 and the surface of the wire rod L arranged in the center of the cavity 6 The recess 2a is formed (imprinted) on the back surface, and the cavities 6a and 6b that can absorb the widening amount generated by the recess 2a are formed in the spare space 8.
The cores 4b and 5b are rod-shaped metal ingots having an elliptical or square cross section with rounded corners, and are integrated by being fitted in the center of the cavities 4a and 5a of the mold. There is.

この例における圧印工程は、所望の面積(領域)に対し所望の深さに至る前記凹部2aの形成を二つの工程で完了する。
即ち、先ず、前記第一形成部b2で行われる第一圧印工程において、所望の凹部2aよりも小さい面積に対し所望の凹部2aよりも浅く圧印し、続く、前記第二形成部b3で行われる第二圧印工程において、前記所望の凹部2aを得る。
そのため、前記第一成形部b2のコア4b,5bの断面積及び高さは、前記第二成形部b3のコア4b,5bの断面積の1/4乃至3/3程度に小さく設定する。
前記第一圧印工程及び第二圧印工程では、前記コア4b,5bの突出体積の増加分の拡幅量を十分な予備空間8で吸収する。
In the imprinting step in this example, the formation of the recess 2a reaching a desired depth with respect to a desired area (region) is completed in two steps.
That is, first, in the first imprinting step performed in the first forming portion b2, the area smaller than the desired recess 2a is imprinted shallower than the desired recess 2a, followed by the second forming portion b3. In the second imprinting step, the desired recess 2a is obtained.
Therefore, the cross-sectional area and height of the cores 4b and 5b of the first molded portion b2 are set as small as about 1/4 to 3/3 of the cross-sectional area of the cores 4b and 5b of the second molded portion b3.
In the first imprinting step and the second imprinting step, the widening amount of the increase in the protruding volume of the cores 4b and 5b is absorbed in the sufficient spare space 8.

前記第三形成部b4乃至第5形成部b6は、前記線材Lの厚みよりも低い略均一な高さの空洞6c〜6eを持ち、後の工程となるに従ってその高さが段階的に低くなるように設定されている。
また、第三形成部b4及び第四形成部b5の空洞6c,6dにあっては、当該線材Lの挿入部2の体積より大きい容積に設定されている一方、第五形成部b6の空洞6eにあっては、当該線材Lの挿入部2の体積と略等しい容積に設定されている。
この様に、この例の挿入部形成工程は、複数の拡幅工程を経て少しずつ拡幅し、仕上げとして単数又は複数の成形工程を行うことによって、一度に強い加圧を行うことに伴う当たり傷を防止するのみならず、成形後の挿入部2の表面状態を良好にすることができる。
The third forming portion b4 to the fifth forming portion b6 have cavities 6c to 6e having a substantially uniform height lower than the thickness of the wire rod L, and the height thereof gradually decreases in a later step. Is set to.
Further, the cavities 6c and 6d of the third forming portion b4 and the fourth forming portion b5 are set to have a volume larger than the volume of the insertion portion 2 of the wire rod L, while the cavities 6e of the fifth forming portion b6. In this case, the volume is set to be substantially equal to the volume of the insertion portion 2 of the wire rod L.
As described above, in the insertion portion forming step of this example, the width is gradually widened through a plurality of widening steps, and a single or a plurality of molding steps are performed as finishing, thereby causing damage caused by applying strong pressure at one time. Not only can it be prevented, but the surface condition of the insertion portion 2 after molding can be improved.

前記第三形成部b4乃至第五形成部b6では、型締めの際に、上型4のキャビティ4aと下型5のキャビティ5aの中央から空洞6c,6d,6eに向けて相対向して突出する各々コア4b,5bが、前記第二圧印工程で形成された凹部2aに嵌り、第一圧印工程及び第二圧印工程を経た線材Lは、上型4のキャビティ4a及び下型5のキャビティ5aの加圧によって押し延ばされる。 In the third forming portion b4 to the fifth forming portion b6, at the time of molding, the cavities 4a of the upper mold 4 and the cavities 5a of the lower mold 5 project from the center toward the cavities 6c, 6d, 6e so as to face each other. The cores 4b and 5b are fitted into the recesses 2a formed in the second imprinting step, and the wire rod L that has undergone the first imprinting step and the second imprinting step is the cavity 4a of the upper die 4 and the cavity 5a of the lower die 5. It is stretched by the pressurization of.

その結果、前記第三形成部b4及び第四形成部b5においては、当該空洞6の所定位置に配置された線材Lの表面及び裏面に形成された凹部2a,2aを維持し、且つ上型4のキャビティ4aと下型5のキャビティ5aによる加圧によって生じた拡幅量を十分な予備空間8で吸収し、前記第五形成部b6においては、当該空洞8の中央に配置された線材Lの表面及び裏面に形成された凹部2a,2aを維持し、且つ上型4のキャビティ4aと下型5のキャビティ5aによる加圧によって生じた拡幅量をキャビティ4a,5aの内壁で押し止めつつ限られた領域に充填することによって、挿入部2をキャビティ4a,5aの内壁に密着する形状にプレス成形する。 As a result, in the third forming portion b4 and the fourth forming portion b5, the recesses 2a and 2a formed on the front surface and the back surface of the wire rod L arranged at the predetermined positions of the cavity 6 are maintained, and the upper mold 4 The amount of widening generated by the pressurization of the cavity 4a and the cavity 5a of the lower mold 5 is absorbed by the sufficient spare space 8, and in the fifth forming portion b6, the surface of the wire rod L arranged in the center of the cavity 8 is absorbed. And the recesses 2a and 2a formed on the back surface are maintained, and the amount of widening caused by the pressurization by the cavities 4a of the upper mold 4 and the cavities 5a of the lower mold 5 is limited while being pressed by the inner walls of the cavities 4a and 5a. By filling the region, the insertion portion 2 is press-formed into a shape that is in close contact with the inner walls of the cavities 4a and 5a.

前記線材ガイドは、上型4と下型5が開いている間に、前記金型の配置に沿って、各工程を担当する各金型の空洞6の配置間隔で、送り出しリールA又は巻き取りリールCと同期を取りつつ、前記線材Lを間欠的に順送すると共に、前記成形装置Bの定位置に確実にセットする。
前記線材Lのセットが完了すると、各金型は、一斉に上型4と下型5とで線材Lを加圧し、各金型所定のプレス加工を行う。
While the upper mold 4 and the lower mold 5 are open, the wire guide guides the feed reel A or the take-up reel A or the winding at the arrangement interval of the cavity 6 of each mold in charge of each process along the arrangement of the mold. While synchronizing with the reel C, the wire rod L is intermittently fed and is reliably set at a fixed position of the molding apparatus B.
When the setting of the wire rod L is completed, each mold simultaneously pressurizes the wire rod L with the upper mold 4 and the lower mold 5, and performs a predetermined press working on each mold.

尚、この様なプレスフィット端子mの製造工程においては、必要に応じて、端部形成工程又は挿入部形成工程の一部に面取り加工や様々な圧印加工などの表面加工工程を含めることができる。
例えば、表面加工部は、前記順送形成工程の一部(例えば最終工程など)として機能するように配置し、前記挿入部2の容積と略等しい成形空洞とし、上型4のキャビティ4aと下型5のキャビティ5aによる加圧によって生じた拡幅量をキャビティ4a,5aの内壁で押し止めつつ限られた領域に充填することによって、所望の面取りや圧印を、キャビティ4a,5aの内壁に密着する形状にプレス成形する。
In the manufacturing process of such a press-fit terminal m, a surface processing step such as chamfering or various imprinting can be included as a part of the end forming step or the inserting portion forming step, if necessary. ..
For example, the surface processing portion is arranged so as to function as a part of the progressive forming step (for example, the final step) to form a molding cavity substantially equal to the volume of the insertion portion 2, and the cavity 4a of the upper mold 4 and the lower portion are formed. By filling a limited area while pressing the widening amount generated by the pressurization by the cavity 5a of the mold 5 with the inner walls of the cavities 4a and 5a, the desired chamfers and imprints are brought into close contact with the inner walls of the cavities 4a and 5a. Press-mold into a shape.

A 送り出しリール,
B 成形装置,
Bn(b1) 端部形成部,
Bw 挿入部形成部,
b2 第一形成部,b3 第二形成部,
b4 第三形成部,b5 第四形成部,b6 第五形成部,
C 巻き取りリール,
L 線材,M 連鎖部品,m プレスフィット端子,
1 先端部,
2 挿入部,2a 凹部,
3 終端部,
4 上型,4a キャビティ,4b コア,4c アンカーコア,
5 下型,5a キャビティ,5b コア,5c アンカーコア,
6 空洞,6a 圧印空洞,6b〜6e 型押し空洞,
7 支持部,8 予備空洞,
A sending reel,
B molding equipment,
Bn (b1) end forming part,
Bw insertion part forming part,
b2 first forming part, b3 second forming part,
b4 third forming part, b5 fourth forming part, b6 fifth forming part,
C take-up reel,
L wire, M chain parts, m press-fit terminal,
1 tip,
2 insertion part, 2a recess,
3 End part,
4 Upper mold, 4a cavity, 4b core, 4c anchor core,
5 Lower mold, 5a cavity, 5b core, 5c anchor core,
6 cavities, 6a imprint cavities, 6b-6e embossed cavities,
7 Support, 8 Spare Cavity,

Claims (2)

均一な断面形状の導電性線材を一定間隔で順送し複数工程で成形する金型を備え、
前記金型は、先細りの端部を形成する端部形成部と、支持孔に保持される挿入部を形成する挿入部形成部が一列に配置され、
前記挿入部形成部は、前記挿入部の容積より広い拡幅空洞と、前記挿入部の容積と略等しい成形空洞を備え、
前記拡幅空洞は、導電性線材の表面に前記金型のアンカーコアが嵌る凹部を形成する圧印空洞と、前記圧印空洞の後段に配置され前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し空洞からなり、
前記成形空洞は、前記拡幅空洞の後段に配置され前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し空洞を備えることを特徴とするプレスフィット端子の製造装置。
Equipped with a mold that sequentially feeds conductive wires with a uniform cross-sectional shape at regular intervals and molds them in multiple processes.
In the mold, an end forming portion forming a tapered end portion and an insertion portion forming portion forming an insertion portion held in a support hole are arranged in a row.
The insertion portion forming portion includes a widening cavity wider than the volume of the insertion portion and a molding cavity substantially equal to the volume of the insertion portion.
The widened cavity has a forging cavity that forms a recess on the surface of the conductive wire rod into which the anchor core of the die fits, and the conductive cavity that is arranged after the imprinting cavity and faces the outside of the recess in which the anchor core fits. Consists of embossed cavities that widen the wire
A press-fit terminal manufacturing apparatus, wherein the molded cavity includes an embossed cavity that is arranged after the widening cavity and widens the conductive wire rod toward the outside of a recess into which the anchor core is fitted.
先細りの端部を形成する端部形成工程と、支持孔に保持される挿入部を形成する挿入部形成工程を含み、均一な断面形状の導電性線材から一列に連結した複数のプレスフィット端子を製造する方法であって、
前記挿入部形成工程は、挿入部を複数段階で形成する順送式形成工程であり、前記挿入部の容積より広い空洞による拡幅工程と、前記挿入部の容積と略等しい空洞による成形工程を経る工程であって、
前記拡幅工程は、導電性線材の表面に後の工程において金型のアンカーコアが嵌る凹部を形成する圧印工程と、前記圧印工程の後段において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を経る工程であって、
前記成形工程は、前記拡幅工程の後段において前記アンカーコアが嵌った凹部の外側に向けて前記導電性線材を拡幅する型押し工程を経る工程であることを特徴とするプレスフィット端子の製造方法。
A plurality of press-fit terminals connected in a row from a conductive wire having a uniform cross-sectional shape, including an end forming step of forming a tapered end and an inserting forming step of forming an insertion portion held in a support hole. It ’s a manufacturing method,
The insertion portion forming step is a progressive forming step of forming the insertion portion in a plurality of stages, and undergoes a widening step with a cavity wider than the volume of the insertion portion and a molding step with a cavity substantially equal to the volume of the insertion portion. It ’s a process,
The widening step includes a stamping step of forming a recess on the surface of the conductive wire rod into which the anchor core of the mold is fitted in a later step, and a conductive step toward the outside of the recess in which the anchor core is fitted in the subsequent stage of the stamping step. It is a process that goes through an embossing process that widens the sex wire.
A method for manufacturing a press-fit terminal, which comprises a step of embossing the conductive wire rod toward the outside of a recess into which the anchor core is fitted in a subsequent stage of the widening step.
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