JP6133080B2

JP6133080B2 - Crimp terminal, crimp terminal manufacturing method, electric wire connection structure, and electric wire connection structure manufacturing method

Info

Publication number: JP6133080B2
Application number: JP2013034041A
Authority: JP
Inventors: 幸大川村; 翔外池; 正和小澤; 小澤　　正和; 山田　拓郎; 拓郎山田
Original assignee: THE FURUKAW ELECTRIC CO., LTD.; Furukawa Automotive Systems Inc
Current assignee: THE FURUKAW ELECTRIC CO., LTD.; Furukawa Automotive Systems Inc
Priority date: 2013-02-24
Filing date: 2013-02-24
Publication date: 2017-05-24
Anticipated expiration: 2033-02-24
Also published as: JP2014164951A

Description

この発明は、例えば自動車用ワイヤハーネスのコネクタ等に装着されるような圧着端子、圧着端子の製造方法、電線接続構造体、並びに電線接続構造体の製造方法に関する。 The present invention relates to a crimp terminal to be attached to, for example, a connector of an automobile wire harness, a method for manufacturing a crimp terminal, a wire connection structure, and a method for manufacturing a wire connection structure.

自動車等に装備された電装機器は、被覆電線を束ねたワイヤハーネスを介して、別の電装機器や電源装置と接続して電気回路を構成している。この際、ワイヤハーネスと電装機器や電源装置とは、それぞれに装着したコネクタ同士で接続されている。
上述したコネクタに備える圧着端子には、様々なものが提案されており、特許文献１に開示の電線接続端子もこのような圧着端子の一つである。
特許文献１に開示の電線接続端子は、導体金属パイプの前半部を押し潰すことによって平らな接続片と、これに連なる電線挿入用筒部とが形成されており、接続片にはビス挿入孔が形成されている。電線接続端子は、所望の機器に対してビスにより接続片を固定するとともに、電線挿入用筒部におけるビス挿入孔に電線の芯線を挿通して電線と機器とを電気的に接続するものである。 An electrical equipment equipped in an automobile or the like is connected to another electrical equipment or a power supply device via a wire harness in which covered electric wires are bundled to constitute an electrical circuit. At this time, the wire harness and the electrical equipment and the power supply device are connected to each other by connectors attached thereto.
Various crimp terminals provided in the connector described above have been proposed, and the wire connection terminal disclosed in Patent Document 1 is one of such crimp terminals.
The electric wire connection terminal disclosed in Patent Document 1 has a flat connection piece formed by crushing the front half of the conductor metal pipe and an electric wire insertion tube portion connected to the flat connection piece, and the connection piece has a screw insertion hole. Is formed. The electric wire connecting terminal fixes the connecting piece with a screw to a desired device and electrically connects the electric wire and the device by inserting the core wire of the electric wire into the screw insertion hole in the cylindrical portion for electric wire insertion. .

登録実用新案第３０１９８２２号公報Registered Utility Model No. 3019822

ところで、近年、接続片と電線挿入用筒部とを別々に形成し、これらを溶接により一体化して製造する端子が提案されている。
この場合に、溶接部をファイバーレーザ溶接するが、レーザ溶接するに際し、溶接面に段差があると、ファイバーレーザの焦点がずれるため、均一に溶接できないという問題がある。段差のどちらかに焦点を合わせると、他方の段差は焦点がずれてしまうため、効率的にエネルギーを照射できないという問題がある。
そこで、本発明の目的は、上述した従来の技術が有する課題を解消し、溶接精度を向上し、溶接不良を抑制できる圧着端子、圧着端子の製造方法、電線接続構造体、並びに電線接続構造体の製造方法を提供することにある。 By the way, in recent years, a terminal has been proposed in which a connection piece and a wire insertion tube part are separately formed and integrated by welding.
In this case, the welded portion is fiber laser welded. However, when laser welding is performed, if there is a step on the welding surface, there is a problem in that the fiber laser is out of focus and cannot be welded uniformly. When focusing on one of the steps, the other step will be out of focus, and there is a problem that energy cannot be efficiently irradiated.
Accordingly, an object of the present invention is to solve the above-mentioned problems of the prior art, improve the welding accuracy, and suppress the welding failure, the crimp terminal manufacturing method, the wire connection structure, and the wire connection structure. It is in providing the manufacturing method of.

上記課題を解決するため、本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が管に形成されており、管の先端が内部封止のために重ね閉じされており、重ね閉じの先端の厚さが一枚の条の厚さと同一であり、この先端と嵌合部とが突合せ溶接されていることを特徴とする。
本発明は、条をプレスして別々に形成される嵌合部および電線接続部を、形成後にレーザ溶接により一体に結合する圧着端子の製造方法において、溶接部の両側の厚さを同一にしてレーザ溶接し、前記各部が同一の厚さの条から別々に形成され、前記電線接続部が、条をプレスして管を形成し、内部封止のために管の先端を潰して重ね閉じにより形成され、重ね閉じの先端を条の厚さと同一になるまで潰し、この先端と嵌合部とを突合せ溶接することを特徴とする。
この構成では、溶接部の両側の厚さが等しく形成されているため、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。
また、溶接部の両側の厚さが等しく形成されているため、例えば、溶接時に両側をクランプする際に、均一にクランプでき、溶接部がしっかりと固定されるため、溶接部を精度よくレーザ溶接できる。
溶接部の嵌合部側は条の厚さであり、重ね閉じタイプの端子側は条が二重となるため、通常は厚さが二倍となる。
この構成では、先端を条の厚さと等しくなるまで潰して、この先端と嵌合部とを突合せ溶接しているため、溶接部の両側の厚さが等しくなり、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、溶接時に両側をクランプする際に、均一にクランプでき、精度よく溶接できる。 In order to solve the above problems, the present invention provides a crimp terminal having a welded portion between a fitting portion and an electric wire connecting portion , the thickness of both sides of the welded portion is the same, and The thickness is the same, the wire connecting portion is formed in the tube, the tip of the tube is overlapped for internal sealing, and the thickness of the end of the overlap is equal to the thickness of one strip It is the same, The front-end | tip and the fitting part are butt-welded, It is characterized by the above-mentioned.
The present invention relates to a method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation, and the thicknesses on both sides of the welded portion are made the same. By laser welding, each part is formed separately from strips of the same thickness, and the wire connection part presses the strips to form a tube, and crushes the tip of the tube for internal sealing, The formed and closed end is crushed until it has the same thickness as the strip, and the end and the fitting portion are butt welded.
In this configuration, since the thicknesses on both sides of the welded portion are formed to be equal, the fiber laser can be uniformly welded without being defocused during laser welding.
In addition, because the thickness of both sides of the weld is equal, for example, when clamping both sides during welding, the weld can be clamped uniformly and the weld is firmly fixed. it can.
The fitting portion side of the welded portion is the thickness of the strip, and the overlap side type terminal side has a double strip, so the thickness is usually doubled.
In this configuration, the tip is crushed until it becomes equal to the thickness of the strip, and the tip and the fitting portion are butt welded. Therefore, the thicknesses on both sides of the welded portion are the same. It is possible to weld uniformly without defocusing. In addition, when clamping both sides during welding, it can be clamped uniformly and can be welded with high accuracy.

本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が管に形成されており、管の先端が内部封止のために重ね閉じされており、重ね閉じの先端の一方の条が突出しており、この突出部と嵌合部とが重ね合わせ溶接されていることを特徴とする。
本発明は、条をプレスして別々に形成される嵌合部および電線接続部を、形成後にレーザ溶接により一体に結合する圧着端子の製造方法において、溶接部の両側の厚さを同一にしてレーザ溶接し、前記各部が同一の厚さの条から別々に形成され、前記電線接続部が、条をプレスして管を形成し、内部封止のために管の先端を潰して重ね閉じにより形成され、重ね閉じの先端の一方を突出させ、この突出部と嵌合部とを重ね合わせて溶接することを特徴とする。
この構成では、重ねて閉じる先端の一方を突出させ、この突出部と嵌合部とを重ね合わせるため、溶接部の両側の厚さが等しくなり、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、両側をクランプする際に、均一にクランプでき、精度よく溶接できる。 In the crimp terminal provided with the welded portion between the fitting portion and the wire connecting portion, the present invention has the same thickness on both sides of the welded portion, and the thickness of the strips forming the respective portions is the same. The wire connecting portion is formed in a tube, the tip of the tube is overlapped for internal sealing, and one of the strips of the end of the overlap is protruding, and the protruding portion and the fitting portion are It is characterized by being overlap welded.
The present invention relates to a method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation, and the thicknesses on both sides of the welded portion are made the same. By laser welding, each part is formed separately from strips of the same thickness, and the wire connection part presses the strips to form a tube, and crushes the tip of the tube for internal sealing, It is formed, and one end of the overlapping closed tip is protruded, and the protruding portion and the fitting portion are overlapped and welded.
In this configuration, one end of the tip that is overlapped and closed is projected, and the protruding portion and the fitting portion are overlapped, so that the thicknesses on both sides of the welded portion are equal, and the fiber laser is out of focus during laser welding. It can be welded uniformly. Moreover, when clamping both sides, it can clamp uniformly and can weld accurately.

本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が被覆外周を圧着する被覆圧着部、及び導体外周を圧着する導体圧着部を、間隔を空けて備えており、導体圧着部と嵌合部とが突合せ溶接されていることを特徴とする。
本発明は、条をプレスして別々に形成される嵌合部および電線接続部を、形成後にレーザ溶接により一体に結合する圧着端子の製造方法において、溶接部の両側の厚さを同一にしてレーザ溶接し、前記端子がオープンバレル形式であり、嵌合部と電線接続部とを突合せ溶接することを特徴とする。
オープンバレル形式であるため、この電線接続部の厚さは条の厚さと等しく、これに対し、嵌合部の厚さも条の厚さと等しいため、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、溶接部の両側をクランプする際に、均一にクランプでき、精度よく溶接できる。 In the crimp terminal provided with the welded portion between the fitting portion and the wire connecting portion, the present invention has the same thickness on both sides of the welded portion, and the thickness of the strips forming the respective portions is the same. The wire connection portion includes a coating crimping portion for crimping the outer periphery of the coating and a conductor crimping portion for crimping the outer periphery of the conductor, with a gap therebetween, and the conductor crimping portion and the fitting portion are butt welded. And
The present invention relates to a method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation, and the thicknesses on both sides of the welded portion are made the same. Laser welding is performed, and the terminal is an open barrel type, and the fitting portion and the wire connection portion are butt welded.
Since this is an open barrel type, the thickness of this wire connection is equal to the thickness of the strip, whereas the thickness of the fitting is also equal to the thickness of the strip, so the fiber laser is out of focus during laser welding. It can be welded uniformly. Further, when clamping both sides of the welded portion, it can be clamped uniformly and can be welded with high accuracy.

本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子と、前記圧着端子の前記電源接続部に挿入した状態で圧着されている電線と、を含む電線接続構造体において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が管に形成されており、管の先端が内部封止のために重ね閉じされており、重ね閉じの先端の厚さが一枚の条の厚さと同一であり、この先端と嵌合部とが突合せ溶接されていることを特徴とする。 The present invention includes a wire connection structure including a crimp terminal provided with a welded portion between the fitting portion and the wire connection portion, and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal. The thickness of both sides of the welded portion is the same, the thickness of the strips forming the respective portions is the same, the wire connecting portion is formed in the tube, and the tip of the tube is for internal sealing It is overlapped, the thickness of the end of the overlap is the same as the thickness of one strip, and the end and the fitting portion are butt welded.

本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子と、前記圧着端子の前記電源接続部に挿入した状態で圧着されている電線と、を含む電線接続構造体において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が管に形成されており、管の先端が内部封止のために重ね閉じされており、重ね閉じの先端の一方の条が突出しており、この突出部と嵌合部とが重ね合わせ溶接されていることを特徴とする。 The present invention includes a wire connection structure including a crimp terminal provided with a welded portion between the fitting portion and the wire connection portion, and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal. The thickness of both sides of the welded portion is the same, the thickness of the strips forming the respective portions is the same, the wire connecting portion is formed in the tube, and the tip of the tube is for internal sealing It is overlapped and closed, and one of the strips at the end of the overlap closure protrudes, and the protruding portion and the fitting portion are overlapped and welded.

本発明は、嵌合部および電線接続部の間に、溶接部を備えた圧着端子と、前記圧着端子の前記電源接続部に挿入した状態で圧着されている電線と、を含む電線接続構造体において、溶接部の両側の厚さが同一であり、前記各部を形成する条の厚さが同一であり、前記電線接続部が被覆外周を圧着する被覆圧着部、及び導体外周を圧着する導体圧着部を、間隔を空けて備えており、導体圧着部と嵌合部とが突合せ溶接されていることを特徴とする。 The present invention includes a wire connection structure including a crimp terminal provided with a welded portion between the fitting portion and the wire connection portion, and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal. , The thickness of both sides of the welded portion is the same, the thickness of the strips forming the respective portions is the same, and the crimping portion where the wire connecting portion crimps the outer periphery of the coating, and the conductor crimping which crimps the outer periphery of the conductor The conductor crimping part and the fitting part are butt-welded.

本発明によれば、溶接部の両側の厚さを等しく形成しているため、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、例えば、両側をクランプする際に、均一にクランプでき、溶接部がしっかりと固定されるため、溶接部を精度よくレーザ溶接できる。 According to the present invention, since the thicknesses on both sides of the welded portion are equally formed, the fiber laser can be uniformly welded without being defocused during laser welding. Further, for example, when both sides are clamped, it can be clamped uniformly and the welded part is firmly fixed, so that the welded part can be laser welded with high accuracy.

第１実施形態の圧着端子付き電線の斜視図。The perspective view of the electric wire with a crimp terminal of a 1st embodiment. 同分解斜視図。The exploded perspective view. 圧着端子付き電線の断面図で、図１のＡ−Ａ断面図。It is sectional drawing of an electric wire with a crimp terminal, and is AA sectional drawing of FIG. 第２実施形態の圧着端子付き電線の図３対応図。FIG. 3 is a view corresponding to FIG. 3 of an electric wire with a crimp terminal according to a second embodiment. 第３実施形態の圧着端子付き電線の図３対応図。FIG. 3 is a view corresponding to FIG. 3 of an electric wire with a crimp terminal according to a third embodiment. 第４実施形態の圧着端子付き電線の図３対応図。FIG. 3 is a diagram corresponding to FIG. 3 of an electric wire with a crimp terminal according to a fourth embodiment.

この発明の一実施形態を以下図面に基づいて詳述する。
(第１実施形態)
図１は、第１実施形態の圧着端子付き電線（電線接続構造体）１の斜視図、図２は、その分解斜視図である。圧着端子付き電線１は、雌型圧着端子２と被覆電線３とを備えている。雌型圧着端子２は、端子接続部（嵌合部）１０と圧着部（電線接続部）２０とを有し、別体で形成した後に、接続対向端をレーザにより突合せ溶接されている。
なお、端子接続部構成基材、及び圧着部構成基材は、雌型圧着端子２を構成するための板状の基材であり、表面が錫メッキ(Ｓｎメッキ)された黄銅等の銅合金条(図示せず)により形成されている。 An embodiment of the present invention will be described in detail with reference to the drawings.
(First embodiment)
FIG. 1 is a perspective view of an electric wire (wire connection structure) 1 with a crimp terminal according to a first embodiment, and FIG. 2 is an exploded perspective view thereof. The electric wire 1 with a crimp terminal includes a female crimp terminal 2 and a covered electric wire 3. The female crimp terminal 2 has a terminal connection part (fitting part) 10 and a crimp part (electric wire connection part) 20, and after being formed as a separate body, the connection facing ends are butt welded by a laser.
The terminal connection part constituting base material and the crimping part constituting base material are plate-like base materials for constituting the female crimp terminal 2, and a copper alloy such as brass whose surface is tin-plated (Sn plated). It is formed by a strip (not shown).

端子接続部１０は、上記条をプレスして折り曲げ形成されており、図示を省略した雄型端子における挿入タブの挿入を許容するボックス部１１と、トランジション部１３とを一体に備えている。ボックス部１１は、底面部の長手方向Ｘと直交する幅方向Ｙの両側部に連設された側面部１２を重なり合うように折り曲げて、長手方向Ｘの先端側から見て略矩形状に構成している。また、ボックス部１１は、倒位の中空四角柱体で構成され、内部に、長手方向Ｘの後方に向かって折り曲げられ、挿入される雄型コネクタの挿入タブ(図示省略)に接触する弾性接触片１１ａを備えている。
トランジション部１３は、ボックス部１１の後端から所定の長さを有して突出し、トランジション底部１４と、該トランジション底部１４の幅方向Ｙの両側から上方へ突出する側壁部１５とで形成されている。 The terminal connecting portion 10 is formed by pressing the above-mentioned strip and bending it, and integrally includes a box portion 11 that allows insertion of an insertion tab in a male terminal (not shown) and a transition portion 13. The box portion 11 is formed in a substantially rectangular shape when viewed from the front end side in the longitudinal direction X by bending the side surface portions 12 continuously provided on both sides in the width direction Y orthogonal to the longitudinal direction X of the bottom surface portion. ing. Further, the box portion 11 is formed of an inverted hollow square column body, and is bent toward the rear in the longitudinal direction X, and is in contact with an insertion tab (not shown) of a male connector to be inserted. A piece 11a is provided.
The transition portion 13 protrudes from the rear end of the box portion 11 with a predetermined length, and is formed by a transition bottom portion 14 and side wall portions 15 protruding upward from both sides in the width direction Y of the transition bottom portion 14. Yes.

圧着部２０は、上記条をプレスして折り曲げ形成されており、電線圧着部２１と封止部２２とを後方から前方側へこの順に配設するとともに、周方向全体において連続する連続形状で一体に形成されている。封止部２２は、電線圧着部２１よりも前方端部を略平板状に押し潰すように変形させ、雌型圧着端子２を構成する板状の端子基材（条）の内面同士が密着するように互いに重合させている。
電線圧着部２１は、管であり、被覆圧着部２１ａ、及び導体圧着部２１ｂを、後方から前方側へこの順に連続して直列に配設している。
電線圧着部２１は、後述する被覆電線３の電線先端部３０を挿入可能に後方側のみが開ロするとともに、長手方向Ｘにおいて先端側、及び周面部全体が開ロしていない中空形状(筒状)でクローズバレル形式とされている。 The crimping part 20 is formed by pressing the above-mentioned strip and bending it. The wire crimping part 21 and the sealing part 22 are arranged in this order from the rear side to the front side, and are integrated in a continuous shape continuous in the entire circumferential direction. Is formed. The sealing part 22 is deformed so as to crush the front end part of the wire crimping part 21 into a substantially flat plate shape, and the inner surfaces of the plate-like terminal base material (stripes) constituting the female crimp terminal 2 are in close contact with each other. Are polymerized with each other.
The electric wire crimping part 21 is a tube, and the covering crimping part 21a and the conductor crimping part 21b are continuously arranged in series in this order from the rear side to the front side.
The wire crimping portion 21 has a hollow shape (cylinder) in which only the rear side is opened so that the wire tip 30 of the covered wire 3 to be described later can be inserted, and the tip side and the entire peripheral surface portion are not opened in the longitudinal direction X. )) And a closed barrel format.

被覆電線３は、図２に示すように、アルミニウム素線を束ねたアルミニウム芯線３１を、絶縁樹脂で構成する絶縁被覆３２で被覆して構成している。
詳しくは、アルミニウム芯線３１は、例えば、断面が０，７５ｍｍ²となるように、アルミニウム合金線を撚って構成しているが、この形態に限定しない。
電線先端部３０は、被覆電線３の先端部分において、被覆先端部３２と導体先端部３１とを先端側へ向けてこの順に直列に備えた部分である。
導体先端部３１は、被覆電線３の前方側の絶縁被覆３２を剥がしてアルミニウム芯線３１を露出させた部分である。
被覆先端部３２は、被覆電線３の先端部分であるが、導体先端部３１よりも後方側部分であって、アルミニウム芯線３１を絶縁被覆３２で被覆した部分である。 As shown in FIG. 2, the covered electric wire 3 is formed by covering an aluminum core wire 31 in which aluminum strands are bundled with an insulating coating 32 made of an insulating resin.
Specifically, the aluminum core wire 31 is formed by twisting an aluminum alloy wire so that the cross section becomes 0,75 mm ² , for example, but is not limited to this form.
The wire tip 30 is a portion provided in series in this order with the sheath tip 32 and the conductor tip 31 directed toward the tip at the tip of the covered wire 3.
The conductor tip 31 is a part where the insulation coating 32 on the front side of the covered electric wire 3 is peeled off to expose the aluminum core wire 31.
The covered tip portion 32 is a tip portion of the covered electric wire 3 and is a portion on the rear side of the conductor tip portion 31 and is a portion in which the aluminum core wire 31 is covered with the insulating coating 32.

図３は、図１のＡ−Ａ断面図であり、端子接続部１０と圧着部２０との接合部の縦断面図である。
本実施形態では、端子接続部１０と圧着部２０とを、同一厚さの条をプレスして別々に形成しておいて、以下の手順に従って、各部の形成後にレーザ溶接により一体に結合して圧着端子２を製造し、この圧着端子２の圧着部２０に挿入した被覆電線３を圧着して、圧着端子付き電線１が製造される。
詳しくは、図２に示すように、別体で構成した端子接続部１０と圧着部２０とを、長手方向Ｘの先端側Ｘｆから後方側Ｘｂに沿ってこの順に直列に配置する。そして、端子接続部１０と圧着部２０とに対し、例えば上方に配置したファイバーレーザ溶接装置（図示省略）からレーザ光を照射し、圧着部２０と端子接続部１０との長手方向対向端部同士４１ａ，４１ｂをレーザ溶接する。 FIG. 3 is a cross-sectional view taken along the line AA of FIG.
In the present embodiment, the terminal connecting portion 10 and the crimping portion 20 are formed separately by pressing the same thickness of the strip, and are joined together by laser welding after the formation of each portion according to the following procedure. The crimp terminal 2 is manufactured, and the covered electric wire 3 inserted into the crimp portion 20 of the crimp terminal 2 is crimped to manufacture the electric wire 1 with the crimp terminal.
Specifically, as shown in FIG. 2, the terminal connection portion 10 and the crimping portion 20 configured separately are arranged in series in this order from the front end side Xf in the longitudinal direction X to the rear side Xb. Then, the terminal connection portion 10 and the crimping portion 20 are irradiated with laser light from, for example, a fiber laser welding apparatus (not shown) disposed above, and the crimping portion 20 and the terminal connection portion 10 are opposed to each other in the longitudinal direction. 41a and 41b are laser welded.

ところで、端子接続部１０の長手方向対向端部４１ｂの厚さは条の厚さと等しく、これに対し、圧着部２０の封止部２２の厚さは、クローズバレル形式故に、重ね閉じタイプであるため、条の二倍の厚さとなり、圧着部２０の長手方向対向端部４１ａの厚さは、通常であれば二倍となる。 By the way, the thickness of the terminal connection portion 10 in the longitudinal direction opposite end portion 41b is equal to the thickness of the strip, whereas the thickness of the sealing portion 22 of the crimping portion 20 is a closed-closed type because of the closed barrel type. For this reason, the thickness is twice that of the strip, and the thickness of the end portion 41a in the longitudinal direction of the crimp portion 20 is usually twice as long.

本実施形態では、端子接続部１０と圧着部２０との溶接に先立って、圧着部２０の封止部２２を、さらにプレスで潰して圧縮し、長手方向対向端部同士４１ａ，４１ｂの厚さが等しく形成されている。そして、圧着部２０と端子接続部１０との長手方向対向端部同士４１ａ，４１ｂが溶接される。
本実施形態では、圧着部２０の封止部２２を条の厚さと等しくなるまで潰し、長手方向対向端部４１ａ，４１ｂの厚さを等しくして突合せ溶接するため、溶接部の両側の厚さが等しくなり、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、図示省略したが、ファイバーレーザ溶接装置（図示省略）からレーザ光を照射する際には、例えば、溶接部の両側をクランプして溶接部をしっかりと固定して溶接することが行われる。
この構成では、溶接部の両側の厚さが等しくなるため、均一にクランプすることができ、精度よくレーザ溶接できる。 In the present embodiment, prior to welding between the terminal connection portion 10 and the crimping portion 20, the sealing portion 22 of the crimping portion 20 is further crushed and compressed by a press, and the thicknesses of the longitudinally opposed end portions 41a and 41b are compared. Are equally formed. And the longitudinal direction opposing ends 41a and 41b of the crimping | compression-bonding part 20 and the terminal connection part 10 are welded.
In the present embodiment, the sealing portion 22 of the crimping portion 20 is crushed until it becomes equal to the thickness of the strip, and the thicknesses of the opposite sides 41a and 41b in the longitudinal direction are made equal to each other for butt welding. When laser welding is performed, the fiber laser is not out of focus and can be welded uniformly. Although not shown, when laser light is irradiated from a fiber laser welding apparatus (not shown), for example, both sides of the welded part are clamped and the welded part is firmly fixed and welded.
In this configuration, since the thicknesses on both sides of the welded portion are equal, it can be clamped uniformly and laser welding can be performed with high accuracy.

(第２実施形態)
図４は、別の実施形態を示している。
この実施形態では、第１実施形態と同様にして、端子接続部１０と圧着部２０とが同一厚さの条をプレスして別々に形成されている。そして、以下の手順に従って、各部の形成後にレーザ溶接により一体に結合して圧着端子２を製造し、この圧着端子２の圧着部２０に挿入した被覆電線３を圧着して、圧着端子付き電線１が製造される。
詳しくは、端子接続部１０の長手方向対向端部４１ｂの厚さは条の厚さと等しく、これに対し、圧着部２０の封止部２２の厚さは、クローズバレル形式故に、重ね閉じタイプであるため、条の二倍の厚さとなり、圧着部２０の長手方向対向端部４１ａの厚さは、通常であれば二倍となる。 (Second embodiment)
FIG. 4 shows another embodiment.
In this embodiment, similarly to the first embodiment, the terminal connection portion 10 and the crimping portion 20 are separately formed by pressing a strip having the same thickness. And according to the following procedures, after forming each part, it couple | bonds together by laser welding, the crimp terminal 2 is manufactured, the covered electric wire 3 inserted in the crimp part 20 of this crimp terminal 2 is crimped, and the electric wire 1 with a crimp terminal Is manufactured.
Specifically, the thickness of the end portion 41b in the longitudinal direction of the terminal connecting portion 10 is equal to the thickness of the strip, whereas the thickness of the sealing portion 22 of the crimping portion 20 is a closed-closed type because of the closed barrel type. For this reason, the thickness is twice that of the strip, and the thickness of the end portion 41a in the longitudinal direction of the crimp portion 20 is usually twice as long.

本実施形態では、圧着部２０の封止部２２が、クローズバレル形式の重ね閉じの先端の上（一方）の部分１２２ａを下（他方）の部分１２２ｂよりも突出させて、上の部分１２２ａを端子接続部１０のトランジション底部（嵌合部）１４の上に重ね合わせ、この状態でレーザ溶接されている。
この構成では、重ねて閉じる先端の一方１２２ａを突出させ、この突出部１２２ａをトランジション底部１４の上に重ね合わせるため、溶接部の両側の厚さが等しくなり、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、例えば、ファイバーレーザ溶接装置（図示省略）の溶接時に両側をクランプする際に、均一にクランプでき、精度よく溶接できる。 In this embodiment, the sealing part 22 of the crimping part 20 causes the upper (one) part 122a to protrude from the lower (the other) part 122b so that the upper part 122a is protruded from the top of the closed barrel-type stacked closure. It overlaps on the transition bottom part (fitting part) 14 of the terminal connection part 10, and is laser-welded in this state.
In this configuration, one end 122a of the front end which is overlapped and closed is projected, and the protrusion 122a is superimposed on the transition bottom portion 14, so that the thicknesses on both sides of the welded portion are equal, and the focus of the fiber laser when laser welding is performed. It can be welded uniformly without shifting. For example, when both sides are clamped at the time of welding by a fiber laser welding apparatus (not shown), it can be clamped uniformly and can be welded with high accuracy.

(第３実施形態)
図５は、別の実施形態を示している。
この実施形態では、第１実施形態と同様にして、端子接続部１０と圧着部２０とが同一厚さの条をプレスして別々に形成されている。ただし、圧着部２０はクローズバレル形式ではなく、後述のようにオープンバレル形式とされている。
圧着部２０の電線圧着部２１は、被覆外周を圧着する被覆圧着部２２１ａ、及び導体外周を圧着する導体圧着部２２１ｂを、間隔を空けて備えており、後方から前方側へこの順に連続して直列に配設している。電線圧着部２１では、アルミニウム芯線３１が露出し、所謂オープンバレル形式とされる。 (Third embodiment)
FIG. 5 shows another embodiment.
In this embodiment, similarly to the first embodiment, the terminal connection portion 10 and the crimping portion 20 are separately formed by pressing a strip having the same thickness. However, the crimping portion 20 is not in a closed barrel format but in an open barrel format as will be described later.
The wire crimping portion 21 of the crimping portion 20 includes a coating crimping portion 221a for crimping the outer periphery of the coating and a conductor crimping portion 221b for crimping the outer periphery of the conductor, with a space therebetween, and continuously from the rear to the front side in this order. They are arranged in series. In the electric wire crimping part 21, the aluminum core wire 31 is exposed, and it is a so-called open barrel type.

端子接続部１０と圧着部２０との形成後に、以下の手順に従って、レーザ溶接により一体に結合して圧着端子２を製造し、この圧着端子２の圧着部２０で被覆電線３を圧着して、圧着端子付き電線１が製造される。
詳しくは、端子接続部１０の長手方向対向端部４１ｂの厚さは条の厚さと等しく、これと同様に、圧着部２０の長手方向対向端部４１ａの厚さは条の厚さと等しく形成されている。そして、図５に示すように、端子接続部１０と圧着部２０とは、長手方向対向端部同士４１ａ，４１ｂを突き合わせて、図示省略したファイバーレーザ溶接装置（図示省略）からレーザ光を照射し、レーザ溶接される。
この構成では、厚さが等しい長手方向対向端部同士４１ａ，４１ｂを突合せ溶接するため、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、例えば、溶接部の両側をクランプして溶接部をしっかりと固定して溶接することが行われるが、この構成では、溶接部の両側をクランプする際に、均一にクランプすることができ、精度よくレーザ溶接できる。 After the terminal connection portion 10 and the crimping portion 20 are formed, the crimped terminal 2 is manufactured by integrally joining by laser welding according to the following procedure, and the covered electric wire 3 is crimped by the crimping portion 20 of the crimping terminal 2, The electric wire 1 with a crimp terminal is manufactured.
Specifically, the thickness of the terminal connection portion 10 in the longitudinal direction opposite end portion 41b is equal to the thickness of the strip, and similarly, the thickness of the crimping portion 20 in the longitudinal direction opposite end portion 41a is equal to the thickness of the strip. ing. As shown in FIG. 5, the terminal connecting portion 10 and the crimping portion 20 butt each other in the longitudinal direction opposite ends 41 a and 41 b and irradiate laser light from a fiber laser welding apparatus (not shown) not shown. Laser welded.
In this configuration, since the longitudinally opposite ends 41a and 41b having the same thickness are butt-welded, the fiber laser can be uniformly welded without being defocused during laser welding. In addition, for example, it is performed by clamping both sides of the welded portion and firmly fixing the welded portion, but in this configuration, when clamping both sides of the welded portion, it can be uniformly clamped, Laser welding can be performed with high accuracy.

(第４実施形態)
図６は、別の実施形態を示している。
この実施形態では、第３実施形態と同様にして、端子接続部１０と圧着部２０とが同一厚さの条をプレスして別々に形成されている。
圧着部２０の電線圧着部２１は、被覆外周を圧着する被覆圧着部２２１ａ、及び導体外周を圧着する導体圧着部２２１ｂを、間隔を空けて備えており、後方から前方側へこの順に連続して直列に配設している。電線圧着部２１では、アルミニウム芯線３１が露出し、所謂オープンバレル形式とされている。 (Fourth embodiment)
FIG. 6 shows another embodiment.
In this embodiment, similarly to the third embodiment, the terminal connection portion 10 and the crimping portion 20 are separately formed by pressing a strip having the same thickness.
The wire crimping portion 21 of the crimping portion 20 includes a coating crimping portion 221a for crimping the outer periphery of the coating and a conductor crimping portion 221b for crimping the outer periphery of the conductor, with a space therebetween, and continuously from the rear to the front side in this order. They are arranged in series. In the electric wire crimping part 21, the aluminum core wire 31 is exposed, and it is a so-called open barrel type.

端子接続部１０と圧着部２０との形成後に、以下の手順に従って、レーザ溶接により一体に結合して圧着端子２を製造し、この圧着端子２の圧着部２０で被覆電線３を圧着して、圧着端子付き電線１が製造される。
詳しくは、端子接続部１０の長手方向対向端部４１ｂにおいて、下部が凹む段差１４１ｂが形成され、これと同様に、圧着部２０の長手方向対向端部４１ａにおいて、上部が凹む段差１４１ａが形成されている。 After the terminal connection portion 10 and the crimping portion 20 are formed, the crimped terminal 2 is manufactured by integrally joining by laser welding according to the following procedure, and the covered electric wire 3 is crimped by the crimping portion 20 of the crimping terminal 2, The electric wire 1 with a crimp terminal is manufactured.
Specifically, a step 141b whose bottom is recessed is formed at the longitudinally facing end 41b of the terminal connecting portion 10, and similarly, a step 141a whose top is recessed is formed at the longitudinally facing end 41a of the crimping portion 20. ing.

そして、図６に示すように、下部が凹む段差１４１ｂと、上部が凹む段差１４１ａとが重ね合され、例えば、重ね合わせ部の中心に図示省略したファイバーレーザ溶接装置（図示省略）からレーザ光を照射し、レーザ溶接される。
このレーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、この溶接部の両側は厚さが等しくなるため、溶接部の両側をクランプする際に、均一にクランプでき、精度よく溶接できる。 Then, as shown in FIG. 6, a step 141b having a concave bottom and a step 141a having a concave top are overlapped. For example, a laser beam is emitted from a fiber laser welding apparatus (not shown) at the center of the superposed portion. Irradiation and laser welding.
At the time of laser welding, the fiber laser can be uniformly welded without defocusing. Moreover, since both sides of the welded portion have the same thickness, when clamping both sides of the welded portion, the welded portion can be uniformly clamped and can be welded with high accuracy.

これら各実施形態では、溶接部の両側の厚さを等しく形成しているため、レーザ溶接するに際し、ファイバーレーザの焦点がずれることがなく、均一に溶接できる。また、例えば、両側をクランプする際に、均一にクランプでき、溶接部がしっかりと固定されるため、溶接部を精度よくレーザ溶接できる。
本実施形態では、雌型圧着端子２で構成したが、圧着部２０を有する圧着端子であればいずれの形態の端子でもよく、上述の雌型圧着端子２の端子接続部１０におけるボックス部１１に挿入接続する挿入タブと圧着部２０とで構成する雄型圧着端子でも適用が可能であり、圧着部２０のみで構成し、複数本の被覆電線３のアルミニウム芯線３１を束ねて接続するための圧着端子にも適用できる。 In each of these embodiments, since the thicknesses on both sides of the welded portion are formed to be equal, the laser beam can be uniformly welded without being out of focus during laser welding. Further, for example, when both sides are clamped, it can be clamped uniformly and the welded part is firmly fixed, so that the welded part can be laser welded with high accuracy.
In the present embodiment, the female crimp terminal 2 is used. However, any type of terminal may be used as long as the crimp terminal 20 has the crimp part 20, and the box part 11 in the terminal connection part 10 of the female crimp terminal 2 described above may be used. A male crimp terminal constituted by an insertion tab to be inserted and the crimping portion 20 can also be applied, and is constituted by only the crimping portion 20 and is a crimp for binding and connecting the aluminum core wires 31 of the plurality of covered electric wires 3. It can also be applied to terminals.

トランジション部１３は、端子接続部１０のボックス部１１の後端から所定の長さを有して突出したが、端子接続部１０の後端側に備えるものに限定されず、圧着部２０の先端側に端子接続部１０に向けて突出する態様で備えてもよく、端子接続部１０と圧着部２０との双方に備えてもよい。さらには、トランジション部１３は、端子接続部１０と圧着部２０とを連結する、図示省略した溶接連結部を別途に設けて、この溶接連結部の一部として備える構成としてもよい。 The transition portion 13 protrudes from the rear end of the box portion 11 of the terminal connection portion 10 with a predetermined length. However, the transition portion 13 is not limited to the one provided on the rear end side of the terminal connection portion 10. You may provide in the aspect which protrudes toward the terminal connection part 10 in the side, and may be provided in both the terminal connection part 10 and the crimping | compression-bonding part 20. Furthermore, the transition part 13 may be configured to separately provide a welding connection part (not shown) that connects the terminal connection part 10 and the crimping part 20 and includes the welding connection part as a part of the welding connection part.

本実施形態では、端子接続部１０と圧着部２０とは、別々に打ち抜き加工や、曲げ加工を行うことにより組み立てることができるため、圧着端子２全体として一括で形成するよりもスムーズに形成することができるとともに、それぞれの形状がさらに複雑化しても正確、且つ容易に形成できる。 In this embodiment, since the terminal connection part 10 and the crimping | compression-bonding part 20 can be assembled by performing a punching process or a bending process separately, it forms smoothly rather than forming collectively as the crimping terminal 2 whole. It can be formed accurately and easily even if each shape becomes more complicated.

また、上述の実施形態では、圧着部２０と端子接続部１０とを銅合金で形成したが、圧着部２０と端子接続部１０とを別部材で形成したため、圧着部２０と端子接続部１０とを異なる材質で形成することが可能となる。例えば、圧着部２０は、被覆電線３のアルミニウム芯線３１の材質に応じて、例えば、アルミニウム系金属で形成するとともに、端子接続部１０は、雄型圧着端子の材質などに応じて銅系金属で形成すれば、例えば、電食が生じにくく、優れた導電性が得られる。
被覆電線３は、例えば、アルミニウムまたはアルミニウム合金性の素線を束ねたアルミニウム芯線３１を、絶縁樹脂（例えば、ポリ塩化ビニル）で構成する導体絶縁層で被覆して構成される。アルミニウム芯線３１は、所定の断面積となるようにアルミニウム素線を撚って構成したが、単線で構成しても良い。 Moreover, in the above-mentioned embodiment, although the crimping | compression-bonding part 20 and the terminal connection part 10 were formed with the copper alloy, since the crimping | compression-bonding part 20 and the terminal connection part 10 were formed by another member, the crimping | compression-bonding part 20 and the terminal connection part 10 Can be formed of different materials. For example, the crimping portion 20 is made of, for example, an aluminum-based metal according to the material of the aluminum core wire 31 of the covered electric wire 3, and the terminal connection portion 10 is made of a copper-based metal according to the material of the male crimping terminal. If formed, for example, electrolytic corrosion is less likely to occur, and excellent conductivity is obtained.
The covered electric wire 3 is configured, for example, by covering an aluminum core wire 31 in which aluminum or aluminum alloy wires are bundled with a conductor insulating layer made of an insulating resin (for example, polyvinyl chloride). The aluminum core wire 31 is formed by twisting an aluminum wire so as to have a predetermined cross-sectional area, but may be formed by a single wire.

本実施形態では、雌型圧着端子２の形状が複雑化しても、雌型圧着端子２全体として複雑な形状のまま一括で形成する必要がなく、端子接続部１０と圧着部２０とを個別に形成できるため、結果的に、例えば、端子形状に打ち抜くための金型の費用を削減できるなど、雌型圧着端子２全体としての製造コスト、労力を削減できる。従って、雌型圧着端子２の設計自由度を大幅に向上させることができる。 In the present embodiment, even if the shape of the female crimp terminal 2 is complicated, it is not necessary to form the female crimp terminal 2 in a complicated shape as a whole, and the terminal connection portion 10 and the crimp portion 20 are individually formed. As a result, it is possible to reduce the manufacturing cost and labor of the female crimp terminal 2 as a whole, for example, the cost of a die for punching into a terminal shape can be reduced. Therefore, the design freedom of the female crimp terminal 2 can be greatly improved.

また、上述した溶接工程を、ファイバーレーザ溶接で行うことにより、他のレーザ溶接と比べて、焦点を極小なスポットに合わせることができ、高出力なレーザ溶接を実現することができ、連続照射可能である。
したがって、溶接部に隙間などの溶接の斑が生じることがなく、溶接部に隙間が生じて水分が浸入することを防止できるため、確実な止水性を確保できるとともに、溶接部の優れた強度を確保することもできる。 In addition, by performing the above-mentioned welding process by fiber laser welding, it is possible to focus on a very small spot compared to other laser welding, realize high-power laser welding, continuous irradiation possible It is.
Therefore, no spots of welding such as gaps are generated in the welded portion, and it is possible to prevent moisture from entering due to gaps in the welded portion. It can also be secured.

１圧着端子付き電線（電線接続構造体）
２圧着端子
３被覆電線
１０端子接続部（嵌合部）
１１ボックス部
１３トランジション部
２０圧着部（電線接続部）
２１電線圧着部
２２封止部
３１アルミニウム芯線
３２絶縁被覆 1 Wire with crimp terminal (wire connection structure)
2 Crimp terminal 3 Coated wire 10 Terminal connection (fitting part)
11 Box part 13 Transition part 20 Crimp part (wire connection part)
21 Wire crimping part 22 Sealing part 31 Aluminum core wire 32 Insulation coating

Claims

In the crimp terminal with the welded part between the fitting part and the wire connection part,
The thickness on both sides of the weld is the same,
The thickness of the strip forming each part is the same, the wire connecting part is formed on the tube, the tip of the tube is overlapped for internal sealing, and the thickness of the tip of the overlap is A crimp terminal having the same thickness as that of a single strip, the tip and the fitting portion being butt welded .

  In the crimp terminal with the welded part between the fitting part and the wire connection part,
  The thickness on both sides of the weld is the same,
  The strips forming the respective portions have the same thickness, the wire connecting portion is formed on the tube, the tip of the tube is overlapped for internal sealing, and one strip at the end of the overlap is closed Is protruding, and the protruding portion and the fitting portion are overlapped and welded.

  In the crimp terminal with the welded part between the fitting part and the wire connection part,
  The thickness on both sides of the weld is the same,
  The strips forming the respective portions have the same thickness, and the wire connecting portion includes a coating crimping portion for crimping the outer periphery of the coating, and a conductor crimping portion for crimping the outer periphery of the conductor, with a gap therebetween, and a conductor crimping portion. The crimp terminal is characterized in that the fitting portion and the fitting portion are butt welded.

In the method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation,
Laser welding with the same thickness on both sides of the weld,
Each part is formed separately from a strip of the same thickness, and the wire connecting portion is formed by pressing the strip to form a tube, crushing the tip of the tube for internal sealing, A method of manufacturing a crimp terminal, comprising: crushing a closed tip until it becomes equal to the thickness of the strip, and butt welding the tip and the fitting portion.

In the method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation,
Laser welding with the same thickness on both sides of the weld,
Each part is formed separately from a strip of the same thickness, and the wire connecting portion is formed by pressing the strip to form a tube, crushing the tip of the tube for internal sealing, A method of manufacturing a crimp terminal, wherein one end of a closed end is projected, and the protruding portion and the fitting portion are overlapped and welded.

In the method of manufacturing a crimp terminal in which a fitting portion and a wire connection portion that are separately formed by pressing a strip are joined together by laser welding after formation,
Laser welding with the same thickness on both sides of the weld,
The method of manufacturing a crimp terminal, wherein the terminal is of an open barrel type, and the fitting portion and the wire connection portion are butt welded.

  Between the fitting portion and the wire connection portion, in the wire connection structure including a crimp terminal provided with a welded portion and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal,
  The thickness on both sides of the weld is the same,
  The thickness of the strip forming each part is the same, the wire connecting part is formed on the tube, the tip of the tube is overlapped for internal sealing, and the thickness of the tip of the overlap is An electric wire connection structure having the same thickness as that of a single strip, the tip and the fitting portion being butt welded.

  Between the fitting portion and the wire connection portion, in the wire connection structure including a crimp terminal provided with a welded portion and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal,
  The thickness on both sides of the weld is the same,
  The strips forming the respective portions have the same thickness, the wire connecting portion is formed on the tube, the tip of the tube is overlapped for internal sealing, and one strip at the end of the overlap is closed Is protruding, and the protruding portion and the fitting portion are overlap-welded and welded.

  Between the fitting portion and the wire connection portion, in the wire connection structure including a crimp terminal provided with a welded portion and an electric wire crimped in a state of being inserted into the power supply connection portion of the crimp terminal,
  The thickness on both sides of the weld is the same,
  The strips forming the respective portions have the same thickness, and the wire connecting portion includes a coating crimping portion for crimping the outer periphery of the coating, and a conductor crimping portion for crimping the outer periphery of the conductor, with a gap therebetween, and a conductor crimping portion. The wire connection structure, wherein the fitting portion and the fitting portion are butt welded.