JP2003311421A - Contact chip for welding and chip body - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact chip for welding and a chip body with which feeding performance and electric supplying performance of a welding wire W are made good and the durability of the wire is made high, whose production cost can be reduced by the production with a few production processes, and whose replacements are economical. <P>SOLUTION: The chip body 11 has a body wire through-hole 15 penetrated from the tip end part to the rear end part in the length direction. A fitting member 12 covers the rear end part of the chip body 11 at the front end part, and the chip body 11 is fitted so as to be attachable/detachable at the front end part. Further, this fitting member 12 has a rear part wire through-hole 16 having larger diameter than that of the body wire through-hole 15 at the center line of the body wire through-hole. The rear part wire through-hole 16 has a narrow part 16a finer than the front end side at the rear end side. A holding part of a leaf spring 14 is fitted to the front end side from the narrow part 16a of the rear part wire through-hole 16. The spring part of the leaf spring 14 is integrally arranged in the hollow part and held in the inside of the fitting member 12 so as to push the welding wire penetrating the body wire through-hole 15 to the inner wall side of the body wire through-hole 15. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【発明の属する技術分野】本発明は、トーチノズル内に
配置される溶接用コンタクトチップおよびチップ本体に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welding contact tip arranged in a torch nozzle and a tip body.

【０００２】[0002]

【従来の技術】従来の溶接用コンタクトチップとして、
特開平９−２９５１５１号公報、特開平１−２８９５７
７号公報、特開平８−１５０４７９号公報および実開平
７−１５１６３号公報に示すものがある。すなわち、特
開平９−２９５１５１号公報に記載の溶接用コンタクト
チップは、後端側のワイヤガイド部の中心より偏心した
位置に溶接ワイヤ用の孔を有し、給電部を安定化するも
のである。特開平１−２８９５７７号公報に記載のもの
は、溶接ワイヤと接触する接触子を用いて給電部を安定
化するようになっている。特開平８−１５０４７９号公
報に記載のものは、穴に溶接ワイヤを通したスリーブを
弾性体により押圧して給電効果を向上するようになって
いる。実開平７−１５１６３号公報に記載のものは、内
挿管を介して押しネジにより溶接ワイヤをたわませ、確
実な給電を行うようになっている。2. Description of the Related Art As a conventional welding contact tip,
JP-A-9-295151 and JP-A-1-28957.
No. 7, JP-A-8-150479 and JP-A-7-15163. That is, the welding contact tip described in JP-A-9-295151 has a hole for a welding wire at a position eccentric from the center of the wire guide portion on the rear end side, and stabilizes the power feeding portion. . The one disclosed in Japanese Patent Application Laid-Open No. 1-289577 stabilizes the power feeding portion by using a contactor that comes into contact with the welding wire. The one described in Japanese Patent Application Laid-Open No. 8-150479 is designed to improve the power feeding effect by pressing a sleeve having a welding wire passed through a hole with an elastic body. The one disclosed in Japanese Utility Model Laid-Open No. 7-15163 is designed so that the welding wire is deflected by a push screw through an insertion tube to reliably feed power.

【０００３】[0003]

【発明が解決しようとする課題】しかしながら、従来の
溶接用コンタクトチップは、交換するときチップ全体を
交換する必要があるため、コストが嵩むという課題があ
った。本発明は、従来の溶接用コンタクトチップとは異
なる構成により、溶接ワイヤの送給性および給電性が良
好で耐久性が高く、少ない製造工程で製造して製造コス
トを低減することができるとともに、交換に際して経済
的な溶接用コンタクトチップおよびチップ本体を提供す
ることを目的としている。However, the conventional welding contact tip has a problem that the cost is increased because it is necessary to replace the entire tip when replacing it. The present invention, due to the configuration different from the conventional welding contact tip, has a high feedability and power feeding property of the welding wire and high durability, and can reduce the manufacturing cost by manufacturing with a small number of manufacturing steps, It is an object of the present invention to provide an economical welding contact tip and tip body for replacement.

【０００４】[0004]

【課題を解決するための手段】上記目的を達成するため
に、本発明に係る溶接用コンタクトチップは、チップ本
体と溶接用ワイヤ給電部への取付け部材と板バネとを有
し、前記チップ本体は先端から後端にかけて長さ方向に
貫通する本体ワイヤ貫通孔を有し、前記取付け部材は先
端が前記チップ本体の後端を被覆して先端に前記チップ
本体が着脱可能に取り付けられ、前記本体ワイヤ貫通孔
の中心線上に前記本体ワイヤ貫通孔より太い後部ワイヤ
貫通孔を有し、前記後部ワイヤ貫通孔は後端側に先端側
より細い狭窄部を有し、前記板バネは保持部とバネ部と
から成り、前記保持部は前記後部ワイヤ貫通孔の狭窄部
より先端側に取り付けられ、前記バネ部は前記保持部に
一体的に設けられて前記本体ワイヤ貫通孔を貫通する溶
接ワイヤを前記本体ワイヤ貫通孔の内壁側に押圧するよ
う前記取付け部材の内側に収容されていることを、特徴
とする。In order to achieve the above object, a welding contact tip according to the present invention has a tip body, a mounting member for a welding wire feeding portion, and a leaf spring. Has a body wire through-hole penetrating in the length direction from the front end to the rear end, and the mounting member has the front end covering the rear end of the chip main body and the chip main body being detachably mounted to the front end, A rear wire through hole that is thicker than the main body wire through hole is provided on the center line of the wire through hole, the rear wire through hole has a narrowed portion on the rear end side that is narrower than the front end side, and the leaf spring has a holding portion and a spring. The holding portion is attached to the tip side of the narrowed portion of the rear wire through hole, the spring portion is integrally provided on the holding portion, and the welding wire that penetrates the body wire through hole is provided. Book That is housed inside the mounting member so as to press the inner wall side of the wire through hole, and wherein.

【０００５】本発明に係る溶接用コンタクトチップは、
トーチノズルの内部に配置され、取付け部材を溶接用ワ
イヤ給電部に取り付け、溶接ワイヤを後部ワイヤ貫通孔
および本体ワイヤ貫通孔に挿入させて使用される。溶接
ワイヤは、後部ワイヤ貫通孔の先端側で板バネにより内
壁側に押圧されて、本体ワイヤ貫通孔で内壁に接触す
る。このとき、溶接ワイヤは、給電されてアークにより
溶融し、溶接を行うことができる。The welding contact tip according to the present invention is
It is arranged inside the torch nozzle, the mounting member is mounted on the welding wire power feeding portion, and the welding wire is inserted into the rear wire through hole and the body wire through hole for use. The welding wire is pressed to the inner wall side by the leaf spring at the tip end side of the rear wire through hole and comes into contact with the inner wall at the main body wire through hole. At this time, the welding wire is supplied with electric power and melted by the arc so that welding can be performed.

【０００６】溶接ワイヤと接触する内壁の摩耗が進んだ
ときにも、溶接ワイヤは板バネで内壁側に押圧されてい
るため、本体ワイヤ貫通孔で内壁と接触し、送給性に影
響を受けることなく、安定した給電がなされる。このた
め、本発明に係る溶接用コンタクトチップは、溶接ワイ
ヤの送給性および給電性が良好で耐久性が高く、アーク
が安定するので溶接結果が良好になる。アークが安定す
ると、スパッタ粒が小さくなり、その発生量が減少する
効果もある。Even when wear of the inner wall in contact with the welding wire progresses, since the welding wire is pressed toward the inner wall by the leaf spring, the welding wire contacts the inner wall through the body wire through hole and the feeding performance is affected. Stable power supply. Therefore, the welding contact tip according to the present invention has good welding wire feeding and feeding characteristics and high durability, and the arc is stable, resulting in a good welding result. When the arc is stabilized, sputter particles are reduced in size, and the amount of generation is also reduced.

【０００７】本発明に係る溶接用コンタクトチップは、
板バネが取付け部材の後部ワイヤ貫通孔に配置され、チ
ップ本体が取付け部材に対して着脱可能のため、溶接ワ
イヤと接触するチップ本体の内壁の摩耗が進んだとき、
取付け部材からチップ本体のみを取り外して交換するこ
とができる。このため、溶接用コンタクトチップ全体を
交換する場合に比べて経済的である。The welding contact tip according to the present invention comprises:
Since the leaf spring is arranged in the rear wire through hole of the attachment member and the tip body is attachable to and detachable from the attachment member, when the inner wall of the tip body coming into contact with the welding wire is worn,
Only the chip body can be removed and replaced from the mounting member. Therefore, it is more economical than replacing the entire welding contact tip.

【０００８】本発明に係る溶接用コンタクトチップで
は、後部ワイヤ貫通孔が後端側に先端側より細い狭窄部
を有し、板バネの保持部が狭窄部より先端側に取り付け
られ、バネ部は取付け部材とチップ本体との間に設けら
れるので、板バネが取付け部材の後端から抜け出るのを
防ぐことができる。In the welding contact tip according to the present invention, the rear wire through-hole has a narrowed portion on the rear end side which is narrower than that on the front end side, the holding portion of the leaf spring is attached to the front end side from the narrowed portion, and the spring portion is Since it is provided between the mounting member and the chip body, the leaf spring can be prevented from slipping out from the rear end of the mounting member.

【０００９】本発明に係る溶接用コンタクトチップにお
いて、前記板バネは前記本体ワイヤ貫通孔を貫通する溶
接ワイヤを案内する溝を有してもよい。この場合、溶接
ワイヤが溝に沿って本体ワイヤ貫通孔の内部でずれるこ
となく安定して送られるので、アークを安定させ、溶接
性を向上させることができる。In the welding contact tip according to the present invention, the leaf spring may have a groove for guiding a welding wire penetrating the body wire through hole. In this case, since the welding wire is stably fed along the groove without being displaced inside the body wire through hole, the arc can be stabilized and the weldability can be improved.

【００１０】本発明に係る溶接用コンタクトチップにお
いて、チップ本体は、クロム銅のほか、黄銅、純銅、ジ
ルコニウム銅、しんちゅう、アルミニウム、リン青銅、
通電性セラミック、ベリリウム銅などを材料に用いるこ
とができる。なお、板バネは後部ワイヤ貫通孔の狭窄部
より先端側に着脱可能に取り付けられてもよい。この場
合、用途に応じて、板厚、長さ、幅、材質、弾力度など
が異なる板バネと交換し、チップ本体の摩耗度を調整す
ることができる。In the welding contact tip according to the present invention, the tip body is made of chromium copper, brass, pure copper, zirconium copper, brass, aluminum, phosphor bronze,
Conductive ceramic, beryllium copper, etc. can be used as the material. The leaf spring may be detachably attached to the tip side of the narrowed portion of the rear wire through hole. In this case, the wear degree of the chip body can be adjusted by replacing with a leaf spring having a different plate thickness, length, width, material, elasticity, etc. according to the application.

【００１１】本発明に係る溶接用コンタクトチップで
は、板バネ保持部材を有し、前記板バネ保持部材は前記
狭窄部より太い円筒状であって前記後部ワイヤ貫通孔の
狭窄部より先端側に設けられ、前記保持部は前記板バネ
保持部材の内部に取り付けられていることが好ましい。
この場合、板バネの保持部を予め板バネ保持部材に取り
付けておけば、板バネの取付け部材への取付けが容易に
なる。In the welding contact tip according to the present invention, a leaf spring holding member is provided, and the leaf spring holding member has a cylindrical shape thicker than the narrowed portion and is provided on the tip side of the narrowed portion of the rear wire through hole. It is preferable that the holding portion is attached inside the leaf spring holding member.
In this case, if the holding portion of the leaf spring is attached to the leaf spring holding member in advance, the leaf spring can be easily attached to the attaching member.

【００１２】本発明に係る溶接用コンタクトチップで、
前記板バネ保持部材は前記狭窄部と前記チップ本体とに
両側から挟まれて保持されていることが好ましい。この
場合、板バネの位置が安定するため、溶接ワイヤは安定
して本体ワイヤ貫通孔で内壁と接触し、送給性に影響を
受けることなく、安定した給電がなされる。しかしなが
ら、板バネ保持部材とチップ本体との間が離れた構成を
有していてもよい。A welding contact tip according to the present invention,
It is preferable that the leaf spring holding member is held by being sandwiched between the narrowed portion and the chip body from both sides. In this case, since the position of the leaf spring is stable, the welding wire is stably brought into contact with the inner wall through the main body wire through hole, and stable power feeding is performed without being affected by the feedability. However, the leaf spring holding member and the chip body may be separated from each other.

【００１３】本発明に係る溶接用コンタクトチップで、
前記チップ本体は外筒部材と耐摩耗部材とから成り、前
記外筒部材は先端から後端にかけて長さ方向に貫通する
挿入孔を有し、前記耐摩耗部材は通電性を有して前記外
筒部材より耐摩耗度が大きく、前記本体ワイヤ貫通孔を
有し、前記挿入孔に挿入されて固定されていてもよい。
この本発明に係る溶接用コンタクトチップでは、溶接ワ
イヤは、外筒部材より耐摩耗度が大きい耐摩耗部材に接
触して給電される。このため、耐久性が高い。A welding contact tip according to the present invention,
The chip body is composed of an outer cylinder member and a wear resistant member, the outer cylinder member has an insertion hole penetrating in the length direction from the front end to the rear end, and the wear resistant member is electrically conductive The wear resistance may be higher than that of the tubular member, the body wire through hole may be provided, and the body wire may be inserted and fixed in the insertion hole.
In the welding contact tip according to the present invention, the welding wire contacts a wear resistant member having a greater wear resistance than the outer tubular member to supply power. Therefore, the durability is high.

【００１４】本発明に係る溶接用コンタクトチップで、
前記チップ本体は外筒部材と耐摩耗部材と挿入部材とか
ら成り、前記外筒部材は先端に前記本体ワイヤ貫通孔の
先端部を有し後端側に前記本体ワイヤ貫通孔より太い挿
入孔を有し、前記耐摩耗部材は通電性を有して前記外筒
部材より耐摩耗度が大きく前記挿入孔に挿入され前記先
端部に連通する前記本体ワイヤ貫通孔の中間部を有し、
前記挿入部材は前記取付け部材への取付部を有し、前記
外筒部材との間に前記耐摩耗部材を挟んで前記挿入孔に
挿入されて固定され前記中間部に連通する前記本体ワイ
ヤ貫通孔の後部を有してもよい。A welding contact tip according to the present invention,
The tip body is composed of an outer cylinder member, a wear resistant member and an insertion member, and the outer cylinder member has a tip portion of the body wire through hole at a tip end and an insertion hole thicker than the body wire through hole at a rear end side. The wear-resistant member has an electric conductivity and has a greater degree of wear resistance than the outer tubular member and has an intermediate portion of the main body wire through-hole that is inserted into the insertion hole and communicates with the tip portion,
The insertion member has an attachment portion to the attachment member, and is inserted into the insertion hole and fixed by sandwiching the wear resistant member between the insertion member and the outer tubular member, and the main body wire through hole communicating with the intermediate portion. It may have a rear part.

【００１５】この場合、外筒部材より耐摩耗度が大きい
耐摩耗部材を有するので、耐久性が高い。耐摩耗部材
は、外筒部材により被覆されているため、外筒部材の材
質に耐摩耗部材より輻射熱およびスパッタによる劣化に
強い材質を用いることにより、耐摩耗部材を溶接箇所か
らの輻射熱およびスパッタによる劣化から保護し、耐久
性を高めることができる。In this case, since the wear resistant member having a greater wear resistance than the outer cylinder member is provided, the durability is high. Since the wear-resistant member is covered by the outer cylinder member, by using a material that is more resistant to deterioration due to radiant heat and spatter than the wear-resistant member to the material of the outer cylinder member, It can protect from deterioration and improve durability.

【００１６】本発明に係るチップ本体は、前述の溶接用
コンタクトチップにおいて、前記取付け部材に着脱可能
に取り付けられることを特徴とする。本発明に係るチッ
プ本体は、溶接ワイヤと接触するチップ本体の内壁の摩
耗が進んだとき、取付け部材からチップ本体のみを取り
外して交換することができる。このため、溶接用コンタ
クトチップ全体を交換する場合に比べて経済的である。The tip body according to the present invention is characterized in that the above-mentioned welding contact tip is detachably attached to the attachment member. The tip body according to the present invention can be replaced by removing only the tip body from the mounting member when the inner wall of the tip body that comes into contact with the welding wire is worn away. Therefore, it is more economical than replacing the entire welding contact tip.

【００１７】[0017]

【発明の実施の形態】以下、図面に基づき、本発明の第
１乃至第３の実施の形態について説明する。図１および
図２は、本発明の第１の実施の形態を示している。図１
に示すように、溶接用コンタクトチップ１０は、チップ
本体１１と溶接用ワイヤ給電部（トーチジョイント）へ
の取付け部材１２と板バネ保持部材１３と板バネ１４と
から成っている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First to third embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show a first embodiment of the present invention. Figure 1
As shown in FIG. 1, the welding contact tip 10 is composed of a tip body 11, a mounting member 12 for a welding wire power feeding portion (torch joint), a leaf spring holding member 13, and a leaf spring 14.

【００１８】チップ本体１１は、筒状をなし、先端から
後端にかけて長さ方向に貫通する本体ワイヤ貫通孔１５
を有する。本体ワイヤ貫通孔１５は、チップ本体１１の
中心線と同一の中心線を有している。本体ワイヤ貫通孔
１５の先端側１５ａは、円筒状であって溶接ワイヤＷの
太さに合わせた口径を有している。本体ワイヤ貫通孔１
５の後端側１５ｂは、円錐形状であって後端にかけて次
第に太くなるよう傾斜している。チップ本体１１は、先
端側外周１１ａに対して後端側外周１１ｂが段差をなし
て細くなり円筒状をなしている。後端側外周には、雄ね
じ部１１ｃが形成されている。The chip body 11 has a cylindrical shape and has a body wire through hole 15 penetrating in the length direction from the front end to the rear end.
Have. The body wire through hole 15 has the same center line as the center line of the chip body 11. The front end side 15a of the main body wire through-hole 15 is cylindrical and has a diameter adapted to the thickness of the welding wire W. Body wire through hole 1
The rear end side 15b of the member 5 has a conical shape and is inclined so as to be gradually thicker toward the rear end. The tip body 11 has a cylindrical shape in which the rear end side outer circumference 11b is stepped and thinned with respect to the front end side outer circumference 11a. A male screw portion 11c is formed on the outer periphery of the rear end side.

【００１９】取付け部材１２は、筒状であって、先端側
の太い円筒部１２ａと後端側の細い円筒部１２ｂとを一
体的に有している。太い円筒部１２ａおよび細い円筒部
１２ｂは、同一の中心線を有している。太い円筒部１２
ａは、先端の内周にチップ本体１１の雄ねじ部１１ｃと
螺合する雌ねじ部１２ｃを有している。太い円筒部１２
ａは先端がチップ本体１１の後端側外周１１ｂを被覆
し、雌ねじ部１２ｃが雄ねじ部１１ｃと螺合している。
これにより、取付け部材１２の先端に、チップ本体１１
が着脱可能に取り付けられる。細い円筒部１２ｂは、外
周に溶接用ワイヤ給電部の雌ねじ部と螺合可能な取付け
用雄ねじ部（図示せず）を有している。取付け部材１２
は、本体ワイヤ貫通孔１５の中心線上に本体ワイヤ貫通
孔１５より太い後部ワイヤ貫通孔１６を有する。後部ワ
イヤ貫通孔１６は、円筒状であってチップ本体１１の中
心線と同一の中心線を有している。後部ワイヤ貫通孔１
６は、後端側の太い円筒部１２ａと細い円筒部１２ｂと
の境界付近に先端側より細い狭窄部１６ａを有する。太
い円筒部１２ａは、狭窄部１６ａより先端側の内周にも
雌ねじ部１２ｄを有している。後部ワイヤ貫通孔１６
は、狭窄部１６ａから後端にかけて次第に太くなってい
る。The mounting member 12 is tubular and integrally has a thick cylindrical portion 12a on the front end side and a thin cylindrical portion 12b on the rear end side. The thick cylindrical portion 12a and the thin cylindrical portion 12b have the same center line. Thick cylindrical part 12
A has an internal thread 12c on the inner circumference of the tip, which is screwed into the external thread 11c of the chip body 11. Thick cylindrical part 12
In a, the tip covers the outer periphery 11b on the rear end side of the chip body 11, and the female screw portion 12c is screwed with the male screw portion 11c.
As a result, the tip body 11 is attached to the tip of the mounting member 12.
Is detachably attached. The thin cylindrical portion 12b has a male thread portion (not shown) for mounting which can be screwed into the female thread portion of the welding wire power feeding portion on the outer circumference. Mounting member 12
Has a rear wire through hole 16 thicker than the main body wire through hole 15 on the center line of the main body wire through hole 15. The rear wire through hole 16 is cylindrical and has the same center line as the center line of the chip body 11. Rear wire through hole 1
No. 6 has a narrowed portion 16a that is thinner than the tip side near the boundary between the thick cylindrical portion 12a on the rear end side and the thin cylindrical portion 12b. The thick cylindrical portion 12a also has a female screw portion 12d on the inner circumference on the tip side of the narrowed portion 16a. Rear wire through hole 16
Is gradually thicker from the narrowed portion 16a to the rear end.

【００２０】板バネ保持部材１３は、狭窄部１６ａより
太い円筒状であって外周に雄ねじ部１３ａを有してい
る。板バネ保持部材１３は、後部ワイヤ貫通孔１６の狭
窄部１６ａより先端側に挿入され雄ねじ部１３ａを取付
け部材１２の雌ねじ部１２ｄと螺合させて固定されてい
る。板バネ保持部材１３は、狭窄部１６ａとチップ本体
１１とに両側から挟まれて狭窄部１６ａとチップ本体１
１とに押さえられて保持されている。これにより、板バ
ネ１４の位置が安定するため、溶接ワイヤＷは安定して
本体ワイヤ貫通孔１５で内壁と接触し、送給性に影響を
受けることなく、安定した給電がなされる。The leaf spring holding member 13 has a cylindrical shape thicker than the narrowed portion 16a and has a male screw portion 13a on the outer circumference. The leaf spring holding member 13 is fixed to the rear wire through hole 16 by inserting the male screw portion 13a into the female screw portion 12d of the mounting member 12 by inserting the male screw portion 13a into the distal end side of the narrowed portion 16a. The leaf spring holding member 13 is sandwiched between the narrowed portion 16a and the chip body 11 from both sides, and the narrowed portion 16a and the chip body 1 are sandwiched.
It is held by being pressed by 1. As a result, the position of the leaf spring 14 is stabilized, so that the welding wire W is stably brought into contact with the inner wall at the main body wire through hole 15, and stable power feeding is performed without being affected by the feedability.

【００２１】図２に示すように、板バネ１４は、保持部
１４ａとバネ部１４ｂとから成る。保持部１４ａは、板
バネ保持部材１３の内部の後端位置に取り付けられてい
る。これにより、保持部１４ａは、後部ワイヤ貫通孔１
６の狭窄部１６ａより先端側に取り付けられている。保
持部１４ａは、リングの一部をジグザグ状に切り欠いた
形状を有し、板バネ保持部材１３の内径よりやや大きい
径を有する。保持部１４ａは、弾力性を有し、板バネ保
持部材１３の内周に沿って広がって、弾力的に取り付け
られている。板バネ保持部材１３により、板バネ１４の
保持部１４ａを予め板バネ保持部材１３に取り付けてお
くことができるため、板バネ１４の取付け部材１２への
取付けは容易である。As shown in FIG. 2, the leaf spring 14 comprises a holding portion 14a and a spring portion 14b. The holding portion 14a is attached to a rear end position inside the leaf spring holding member 13. As a result, the holding portion 14a has the rear wire through hole 1
It is attached to the tip side of the narrowed portion 16a. The holding portion 14 a has a shape in which a part of the ring is cut out in a zigzag shape, and has a diameter slightly larger than the inner diameter of the leaf spring holding member 13. The holding portion 14a has elasticity, spreads along the inner circumference of the leaf spring holding member 13, and is elastically attached. Since the holding portion 14a of the leaf spring 14 can be attached to the leaf spring holding member 13 in advance by the leaf spring holding member 13, the leaf spring 14 can be easily attached to the attaching member 12.

【００２２】バネ部１４ｂは、保持部１４ａに一体的に
設けられている。バネ部１４ｂは、細長い板状で、保持
部１４ａ付近から折れ曲がり、先端が保持部１４ａの中
心線を越えた位置まで伸びている。バネ部１４ｂは、取
付け部材１２の内側で板バネ保持部材１３の内部に収容
されている。バネ部１４ｂは、本体ワイヤ貫通孔１５を
貫通する溶接ワイヤを本体ワイヤ貫通孔１５の内壁側に
押圧するよう本体ワイヤ貫通孔１５の延長上を横切って
配置される。バネ部１４ｂの先端は、先端両側１４ｃが
突出するよう湾曲して断面Ｕ字状の溝を有している。こ
れにより、溶接ワイヤが溝に沿って本体ワイヤ貫通孔１
５の内部でずれることなく安定して送られるので、アー
クを安定させ、溶接性を向上させることができる。The spring portion 14b is provided integrally with the holding portion 14a. The spring portion 14b has an elongated plate shape, is bent from near the holding portion 14a, and has a tip extending to a position beyond the center line of the holding portion 14a. The spring portion 14b is housed inside the leaf spring holding member 13 inside the mounting member 12. The spring portion 14b is arranged across the extension of the main body wire through hole 15 so as to press the welding wire passing through the main body wire through hole 15 toward the inner wall side of the main body wire through hole 15. The tip of the spring portion 14b has a groove with a U-shaped cross section that is curved so that both sides 14c of the tip protrude. This allows the welding wire to move along the groove along the body wire through hole 1
Since it is fed stably without slipping inside 5, the arc can be stabilized and the weldability can be improved.

【００２３】次に、作用について説明する。溶接用コン
タクトチップ１０は、トーチノズルの内部に配置され、
取付け部材１２を溶接用ワイヤ給電部に取り付け、溶接
ワイヤＷを後部ワイヤ貫通孔１６および本体ワイヤ貫通
孔１５に挿入させて使用される。溶接ワイヤＷは、後部
ワイヤ貫通孔１６の先端側で板バネ１４により内壁側に
押圧されて、本体ワイヤ貫通孔１５で内壁に接触する。
このとき、溶接ワイヤＷは、給電されてアークにより溶
融し、溶接を行うことができる。Next, the operation will be described. The welding contact tip 10 is arranged inside the torch nozzle,
The attachment member 12 is attached to the welding wire power feeding portion, and the welding wire W is inserted into the rear wire through hole 16 and the body wire through hole 15 for use. The welding wire W is pressed to the inner wall side by the leaf spring 14 at the tip end side of the rear wire through hole 16 and comes into contact with the inner wall at the main body wire through hole 15.
At this time, the welding wire W is supplied with electric power and melted by the arc so that welding can be performed.

【００２４】溶接ワイヤＷと接触する内壁の摩耗が進ん
だときにも、溶接ワイヤＷは板バネ１４で内壁側に押圧
されているため、本体ワイヤ貫通孔１５で内壁と接触
し、送給性に影響を受けることなく、安定した給電がな
される。このため、溶接用コンタクトチップは、溶接ワ
イヤＷの送給性および給電性が良好で耐久性が高く、ア
ークが安定するので溶接結果が良好になる。アークが安
定すると、スパッタ粒が小さくなり、その発生量が減少
する効果もある。Even when wear of the inner wall in contact with the welding wire W progresses, the welding wire W is pressed toward the inner wall side by the leaf spring 14, so that the main body wire through hole 15 comes into contact with the inner wall and feedability is improved. Stable power supply is achieved without being affected by. For this reason, the welding contact tip has a high feedability and power feeding ability of the welding wire W and high durability, and the arc is stable, so that the welding result is good. When the arc is stabilized, sputter particles are reduced in size, and the amount of generation is also reduced.

【００２５】溶接用コンタクトチップ１０は、板バネ１
４が取付け部材１２の後部ワイヤ貫通孔１６に配置さ
れ、チップ本体１１が取付け部材１２に対して着脱可能
のため、溶接ワイヤＷと接触するチップ本体１１の内壁
の摩耗が進んだとき、取付け部材１２からチップ本体１
１のみを取り外して交換することができる。このため、
溶接用コンタクトチップ１０全体を交換する場合に比べ
て経済的である。The contact tip 10 for welding is a leaf spring 1.
4 is arranged in the rear wire through hole 16 of the mounting member 12 and the tip body 11 is attachable to and detachable from the mounting member 12, so that when the inner wall of the tip body 11 in contact with the welding wire W is worn, the mounting member 12 to chip body 1
Only 1 can be removed and replaced. For this reason,
It is more economical than replacing the entire welding contact tip 10.

【００２６】溶接用コンタクトチップ１０では、後部ワ
イヤ貫通孔１６が後端側に先端側より細い狭窄部１６ａ
を有し、板バネ１４の保持部１４ａが狭窄部１６ａより
先端側に取り付けられ、バネ部１４ｂは取付け部材１２
とチップ本体１１との間に設けられるので、板バネ１４
が取付け部材１２の後端から抜け出るのを防ぐことがで
きる。In the welding contact tip 10, the rear wire through hole 16 has a narrowed portion 16a on the rear end side which is thinner than the front end side.
The holding portion 14a of the leaf spring 14 is attached to the tip side of the narrowed portion 16a, and the spring portion 14b is attached to the attaching member 12.
And the chip body 11, the leaf spring 14
Can be prevented from coming out of the rear end of the mounting member 12.

【００２７】次に、本発明の第２の実施の形態について
説明する。図３は、本発明の第２の実施の形態を示して
いる。図３に示すように、溶接用コンタクトチップ２０
は、チップ本体２１が外筒部材２２と耐摩耗部材２３と
から成る。外筒部材２２は、先端から後端にかけて長さ
方向に貫通する挿入孔２２ａを有する。挿入孔２２ａ
は、本体ワイヤ貫通孔１５の先端側１５ａより内径が太
くなっている。チップ本体２１は、取付け部材１２の雌
ねじ部１２ｃと螺合する雄ねじ部１１ｃを有している。
耐摩耗部材２３は、通電性を有してチップ本体２１より
耐摩耗度が大きい材質から成る。耐摩耗部材２３は、長
さ方向に中心を貫通する本体ワイヤ貫通孔１５を有す
る。耐摩耗部材２３は、挿入孔２２ａに挿入され、外筒
部材２２にかしめ固定されている。溶接用コンタクトチ
ップ２０の他の構成は、前述の第１の実施の形態の溶接
用コンタクトチップ１０の構成と同一であり、同一の部
材には同一の符号を付し、重複する説明を省略する。Next, a second embodiment of the present invention will be described. FIG. 3 shows a second embodiment of the present invention. As shown in FIG. 3, the contact tip 20 for welding
The chip body 21 is composed of an outer cylinder member 22 and a wear resistant member 23. The outer cylinder member 22 has an insertion hole 22a penetrating in the length direction from the front end to the rear end. Insertion hole 22a
Has a larger inner diameter than the tip side 15a of the body wire through hole 15. The chip body 21 has a male screw portion 11c that is screwed into the female screw portion 12c of the mounting member 12.
The wear-resistant member 23 is made of a material that is electrically conductive and has a greater wear resistance than the chip body 21. The wear resistant member 23 has a main body wire through hole 15 penetrating the center in the length direction. The wear resistant member 23 is inserted into the insertion hole 22a and is caulked and fixed to the outer tubular member 22. The other configuration of the welding contact tip 20 is the same as the configuration of the welding contact tip 10 of the first embodiment described above, and the same members are denoted by the same reference numerals and redundant description will be omitted. .

【００２８】次に、作用について説明する。溶接用コン
タクトチップ２０では、溶接ワイヤＷは、チップ本体２
１より耐摩耗度が大きい耐摩耗部材２３に接触して給電
される。このため、耐久性が高い。溶接用コンタクトチ
ップ２０の他の作用、効果は、前述の第１の実施の形態
の溶接用コンタクトチップ１０の作用、効果と同一であ
り、重複する説明を省略する。Next, the operation will be described. In the welding contact tip 20, the welding wire W is connected to the tip body 2
Power is supplied by contacting the wear resistant member 23 having a wear resistance greater than 1. Therefore, the durability is high. The other actions and effects of the welding contact tip 20 are the same as the actions and effects of the welding contact tip 10 of the first embodiment described above, and a duplicate description will be omitted.

【００２９】次に、本発明の第３の実施の形態について
説明する。図４は、本発明の第３の実施の形態を示して
いる。図４に示すように、溶接用コンタクトチップ３０
では、チップ本体３１が外筒部材３２と耐摩耗部材３３
と挿入部材３４とから成る。外筒部材３２は、先端に本
体ワイヤ貫通孔１５の先端側１５ａの先端部３２ａを有
し後端側に本体ワイヤ貫通孔１５より太い挿入孔３２ｂ
を有する。挿入孔３２ｂの内周には、雌ねじ部３２ｃが
形成されている。耐摩耗部材３３は、通電性を有して外
筒部材３２より耐摩耗度が大きい材質から成る。耐摩耗
部材３３は、円筒状であって外周に雌ねじ部３２ｃと螺
合する雄ねじ部３３ａを有する。耐摩耗部材３３は、本
体ワイヤ貫通孔１５の先端側１５ａの中間部３３ｂを有
する。耐摩耗部材３３は、雄ねじ部３３ａを雌ねじ部３
２ｃと螺合させて挿入孔３２ｂに挿入されている。耐摩
耗部材３３の本体ワイヤ貫通孔１５の中間部３３ｂは、
先端部３２ａに連通する。Next, a third embodiment of the present invention will be described. FIG. 4 shows a third embodiment of the present invention. As shown in FIG. 4, the contact tip 30 for welding
Then, the chip body 31 includes the outer cylinder member 32 and the wear resistant member 33.
And insertion member 34. The outer cylinder member 32 has a tip portion 32a at the tip end side 15a of the body wire through hole 15 at the tip end, and an insertion hole 32b thicker than the body wire through hole 15 at the rear end side.
Have. A female screw portion 32c is formed on the inner circumference of the insertion hole 32b. The wear-resistant member 33 is made of a material that is electrically conductive and has a greater wear resistance than the outer tubular member 32. The wear-resistant member 33 has a cylindrical shape and has an external thread portion 33a screwed into the internal thread portion 32c on the outer circumference. The abrasion resistant member 33 has an intermediate portion 33b on the tip side 15a of the main body wire through hole 15. The wear-resistant member 33 includes a male screw portion 33a and a female screw portion 3
2c is screwed and inserted into the insertion hole 32b. The intermediate portion 33b of the body wire through hole 15 of the wear resistant member 33 is
It communicates with the tip portion 32a.

【００３０】挿入部材３４は、円筒状であって外周に雌
ねじ部３２ｃと螺合する雄ねじ部３４ａを有する。挿入
部材３４は、雄ねじ部３４ａの後端側が取付け部材１２
への取付部となっており、取付け部材１２の雌ねじ部１
２ｃと螺合している。挿入部材３４は、外筒部材３２と
の間に耐摩耗部材３３を挟んで、雄ねじ部３４ａの先端
側を雌ねじ部３２ｃと螺合させ挿入孔３２ａに挿入され
て固定されている。挿入部材３４は、本体ワイヤ貫通孔
１５の中間部３３ｂに連通する本体ワイヤ貫通孔１５の
先端側１５ａの後部３４ｂおよび後端側１５ｂを有す
る。溶接用コンタクトチップ３０の他の構成は、前述の
第１の実施の形態の溶接用コンタクトチップ１０の構成
と同一であり、同一の部材には同一の符号を付し、重複
する説明を省略する。The insertion member 34 is cylindrical and has a male screw portion 34a on the outer periphery which is screwed into the female screw portion 32c. As for the insertion member 34, the rear end side of the male screw portion 34a is attached to the attachment member 12
To the female screw portion 1 of the mounting member 12.
It is screwed with 2c. The insertion member 34 is fixed by being inserted into the insertion hole 32a by interposing the wear resistant member 33 between the insertion member 34 and the outer cylindrical member 32, screwing the tip end side of the male screw portion 34a into the female screw portion 32c. The insertion member 34 has a rear portion 34b and a rear end side 15b of the front end side 15a of the main body wire through hole 15 which communicates with the intermediate portion 33b of the main body wire through hole 15. The other structure of the contact tip 30 for welding is the same as that of the contact tip 10 for welding of the above-mentioned 1st Embodiment, the same code | symbol is attached | subjected to the same member and the overlapping description is abbreviate | omitted. .

【００３１】次に、作用について説明する。溶接用コン
タクトチップ３０では、外筒部材３２より耐摩耗度が大
きい耐摩耗部材３３を有するので、耐久性が高い。耐摩
耗部材３３は、外筒部材３２により被覆されているた
め、外筒部材３２の材質に耐摩耗部材３３より輻射熱お
よびスパッタによる劣化に強い材質を用いることによ
り、耐摩耗部材３３を溶接箇所からの輻射熱およびスパ
ッタによる劣化から保護し、耐久性を高めることができ
る。溶接用コンタクトチップ３０の他の作用、効果は、
前述の第１の実施の形態の溶接用コンタクトチップ１０
の作用、効果と同一であり、重複する説明を省略する。Next, the operation will be described. Since the welding contact tip 30 has the wear resistant member 33 having a greater wear resistance than the outer tubular member 32, the durability is high. Since the wear-resistant member 33 is covered with the outer cylinder member 32, the wear-resistant member 33 can be removed from the welding location by using a material that is more resistant to deterioration due to radiant heat and spatter than the wear-resistant member 33 as the material of the outer cylinder member 32. It is possible to protect from deterioration due to radiant heat and spatter and improve durability. Other actions and effects of the welding contact tip 30 are as follows.
The welding contact tip 10 of the first embodiment described above.
This is the same as the operation and effect of the above, and redundant description will be omitted.

【００３２】[0032]

【発明の効果】本発明によれば、溶接ワイヤの送給性お
よび給電性が良好で耐久性が高く、少ない製造工程で製
造して製造コストを低減することができるとともに、交
換に際して経済的な溶接用コンタクトチップおよびチッ
プ本体を提供することができる。According to the present invention, the welding wire has good feedability and feedability, high durability, and can be manufactured by a small number of manufacturing steps to reduce the manufacturing cost, and it is economical in replacement. A contact tip and tip body for welding can be provided.

【図面の簡単な説明】[Brief description of drawings]

【図１】本発明の第１の実施の形態の溶接用コンタクト
チップの縦断面図である。FIG. 1 is a vertical cross-sectional view of a welding contact tip according to a first embodiment of the present invention.

【図２】図１の溶接用コンタクトチップで用いる板バネ
の（ａ）正面図、（ｂ）側面図、平面図である。2 (a) is a front view, FIG. 2 (b) is a side view, and FIG. 2 is a plan view of a leaf spring used in the welding contact tip of FIG.

【図３】本発明の第２の実施の形態の溶接用コンタクト
チップの縦断面図である。FIG. 3 is a vertical sectional view of a welding contact tip according to a second embodiment of the present invention.

【図４】本発明の第３の実施の形態の溶接用コンタクト
チップの縦断面図である。FIG. 4 is a vertical sectional view of a welding contact tip according to a third embodiment of the present invention.

【符号の説明】[Explanation of symbols]

１０，２０，３０ 溶接用コンタクトチップ １１ チップ本体 １２ 溶接用ワイヤ給電部（トーチジョイント）への取
付け部材 １３ 板バネ保持部材 １４ 板バネ １５ 本体ワイヤ貫通孔 １６ 後部ワイヤ貫通孔10, 20, 30 Welding contact tip 11 Tip body 12 Attachment member for welding wire power feeding portion (torch joint) 13 Leaf spring holding member 14 Leaf spring 15 Body wire through hole 16 Rear wire through hole

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】チップ本体と溶接用ワイヤ給電部への取付
け部材と板バネとを有し、 前記チップ本体は先端から後端にかけて長さ方向に貫通
する本体ワイヤ貫通孔を有し、 前記取付け部材は先端が前記チップ本体の後端を被覆し
て先端に前記チップ本体が着脱可能に取り付けられ、前
記本体ワイヤ貫通孔の中心線上に前記本体ワイヤ貫通孔
より太い後部ワイヤ貫通孔を有し、前記後部ワイヤ貫通
孔は後端側に先端側より細い狭窄部を有し、 前記板バネは保持部とバネ部とから成り、前記保持部は
前記後部ワイヤ貫通孔の狭窄部より先端側に取り付けら
れ、前記バネ部は前記保持部に一体的に設けられて前記
本体ワイヤ貫通孔を貫通する溶接ワイヤを前記本体ワイ
ヤ貫通孔の内壁側に押圧するよう前記取付け部材の内側
に収容されていることを、 特徴とする溶接用コンタクトチップ。1. A tip body, a mounting member for attaching to a welding wire power feeding portion, and a leaf spring, wherein the tip body has a body wire through hole penetrating in a length direction from a front end to a rear end. The member has a tip covering the rear end of the chip body, the tip body is detachably attached to the tip, and has a rear wire through hole thicker than the body wire through hole on the center line of the body wire through hole, The rear wire through hole has a narrowed portion on the rear end side that is narrower than the front end side, the leaf spring includes a holding portion and a spring portion, and the holding portion is attached to the front end side of the narrowed portion of the rear wire through hole. The spring portion is integrally provided on the holding portion and is housed inside the mounting member so as to press the welding wire penetrating the body wire through hole toward the inner wall side of the body wire through hole. To Welding contact tip according to claim. 【請求項２】板バネ保持部材を有し、前記板バネ保持部
材は前記狭窄部より太い円筒状であって前記後部ワイヤ
貫通孔の狭窄部より先端側に設けられ、 前記保持部は前記板バネ保持部材の内部に取り付けられ
ていることを、 特徴とする請求項１記載の溶接用コンタクトチップ。2. A leaf spring holding member, wherein the leaf spring holding member has a cylindrical shape thicker than the narrowed portion and is provided closer to the tip side than the narrowed portion of the rear wire through hole, and the holding portion is the plate. The contact tip for welding according to claim 1, wherein the contact tip is attached inside the spring holding member. 【請求項３】前記板バネ保持部材は前記狭窄部と前記チ
ップ本体とに両側から挟まれて保持されていることを、 特徴とする請求項２記載の溶接用コンタクトチップ。3. The contact tip for welding according to claim 2, wherein the leaf spring holding member is held by being sandwiched between the narrowed portion and the tip body from both sides. 【請求項４】前記チップ本体は外筒部材と耐摩耗部材と
から成り、前記外筒部材は先端から後端にかけて長さ方
向に貫通する挿入孔を有し、前記耐摩耗部材は通電性を
有して前記外筒部材より耐摩耗度が大きく、前記本体ワ
イヤ貫通孔を有し、前記挿入孔に挿入されて固定されて
いることを、 特徴とする請求項１，２または３記載の溶接用コンタク
トチップ。4. The tip body comprises an outer cylinder member and a wear resistant member, the outer cylinder member having an insertion hole penetrating in the length direction from the front end to the rear end, and the wear resistant member is electrically conductive. 4. The welding according to claim 1, wherein the outer cylinder member has a greater degree of wear resistance, has the main body wire through hole, and is fixed by being inserted into the insertion hole. Contact tip. 【請求項５】前記チップ本体は外筒部材と耐摩耗部材と
挿入部材とから成り、前記外筒部材は先端に前記本体ワ
イヤ貫通孔の先端部を有し後端側に前記本体ワイヤ貫通
孔より太い挿入孔を有し、前記耐摩耗部材は通電性を有
して前記外筒部材より耐摩耗度が大きく前記挿入孔に挿
入され前記先端部に連通する前記本体ワイヤ貫通孔の中
間部を有し、前記挿入部材は前記取付け部材への取付部
を有し、前記外筒部材との間に前記耐摩耗部材を挟んで
前記挿入孔に挿入されて固定され前記中間部に連通する
前記本体ワイヤ貫通孔の後部を有することを、 特徴とする請求項１，２または３記載の溶接用コンタク
トチップ。5. The chip body comprises an outer cylinder member, a wear resistant member and an insertion member, and the outer cylinder member has a tip portion of the body wire through hole at a tip end thereof and the body wire through hole at a rear end side thereof. The wear resistant member has a thicker insertion hole, is electrically conductive, has a greater wear resistance than the outer cylindrical member, and is inserted into the insertion hole to communicate with the distal end portion of the body wire through hole. The insertion member has an attachment portion to the attachment member, is inserted into the insertion hole with the wear resistant member interposed between the insertion member and the outer member, is fixed, and is connected to the intermediate portion. The contact tip for welding according to claim 1, further comprising a rear portion of the wire through hole. 【請求項６】請求項１，２，３，４または５記載の溶接
用コンタクトチップにおいて、 前記取付け部材に着脱可能に取り付けられることを特徴
とするチップ本体。6. The welding contact tip according to claim 1, 2, 3, 4 or 5, wherein the tip body is detachably attached to the attachment member.