JPH09295151A - Contact tip for arc welding - Google Patents
Contact tip for arc weldingInfo
- Publication number
- JPH09295151A JPH09295151A JP13085796A JP13085796A JPH09295151A JP H09295151 A JPH09295151 A JP H09295151A JP 13085796 A JP13085796 A JP 13085796A JP 13085796 A JP13085796 A JP 13085796A JP H09295151 A JPH09295151 A JP H09295151A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- welding wire
- wire guide
- guide portion
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/24—Features related to electrodes
- B23K9/26—Accessories for electrodes, e.g. ignition tips
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はアーク溶接トーチの
先端に用いられるコンタクトチップに関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact tip used at the tip of an arc welding torch.
【０００２】[0002]
【従来の技術】アーク溶接は、溶接トーチから供給され
る溶接ワイヤ（溶加材）と被溶接物との間にアークを発
生させ、その発生熱により溶接ワイヤおよび被溶接物を
溶融接合するものである。アーク溶接としては、溶接部
位を大気雰囲気から所定の雰囲気とするためそこに主に
Arからなる遮蔽ガスを流すＭＩＧ溶接や、CO2 ガスある
いは、CO2 とArの混合ガスを流すMAG 溶接が主として採
用されている。図３に従来のチップの代表的な構造図を
示して説明する。図に示されるように、チップ先端に向
けて、溶接用ワイヤガイド部４と、３ｍｍ〜１０ｍｍの
溶接ワイヤ給電部５で構成されている。このような構成
では、チップ先端部から送り出された溶接用ワイヤ６
は、突き出し長が高々１０〜１５ｍｍ程度の場合であれ
ば、溶接上問題にならないばらつき幅として、ワイヤ径
以内に収まることは周知である。2. Description of the Related Art In arc welding, an arc is generated between a welding wire (filler material) supplied from a welding torch and an object to be welded, and the generated heat melts and welds the welding wire and the object to be welded. Is. For arc welding, it is necessary to change the welding area from the air atmosphere to a predetermined atmosphere.
MIG welding, which flows a shielding gas composed of Ar, and MAG welding, which flows CO2 gas or a mixed gas of CO2 and Ar, are mainly used. FIG. 3 shows a typical structure of a conventional chip for explanation. As shown in the figure, it is composed of a welding wire guide portion 4 and a welding wire power feeding portion 5 of 3 mm to 10 mm toward the tip of the tip. In such a configuration, the welding wire 6 sent from the tip end portion
It is well known that when the protrusion length is at most about 10 to 15 mm, the variation width that does not pose a problem in welding is within the wire diameter.
【０００３】従来のコンタクトチップに関して、特開平
５−２６１５５１号公報に記載されているように、コン
タクトチップの耐摩耗性を向上させて高寿命化されたも
の、ワイヤ送給先端位置のばらつきを減少させたもの、
溶接ワイヤ給電点の安定化を図りアークを安定化させる
もの、コンタクトチップ先端にスパッタ等が付着しにく
い工夫を凝らしチップ溶着が発生しにくいようにしたも
の等が数多くの提案がなされている。例えばコンタクト
チップの先端部にセラミックス製又はカーボン製のチッ
プ片やキャップを嵌着したもの（実開昭60−146578、特
開昭61−115683、実開昭61−82783 ）、TiN 等のセラミ
ックスを内外表面にPVD コーティング又はCVD コーティ
ングしたもの（実開昭61−77175 ）、更にはＷ系プラズ
マ溶射層をも形成させたもの（特開昭61−115683）が考
えられている。これらに用いられる非銅系材料は金属と
の親和性が低いためにスパッタが付着し難く、また付着
しても容易に剥脱できるという利点がある。また、溶接
用ワイヤには、通常巻かれて収納されているため、ワイ
ヤ自体に曲がり癖が存在し、コンタクトチップに送給さ
れて来るまでに、その曲がり癖によって給電部がばらつ
き、アークが不安定になるため、溶接トーチ（特開昭６
３−８０９７８）やコンタクトチップ（特開平４−２９
４８７０）等で改善されていることは周知である。Regarding the conventional contact tip, as described in Japanese Patent Application Laid-Open No. 5-261551, the contact tip has improved wear resistance and a longer life, and the variation in the wire feeding tip position is reduced. What was made
Many proposals have been made to stabilize the arc by stabilizing the welding wire feeding point, and to make it difficult for tip welding to occur by devising measures to prevent spatter from adhering to the tip of the contact tip. For example, a tip or tip of a contact tip fitted with a ceramic or carbon tip or a cap (actually 60-146578, JP 61-115683, 61-82783), ceramics such as TiN may be used. It is considered that the inner and outer surfaces are PVD-coated or CVD-coated (Shokaisho 61-77175), and further a W-based plasma sprayed layer is formed (JP-A-61-115683). Since the non-copper-based materials used for these have low affinity with metals, spatter is difficult to attach, and even if they are attached, they can be easily peeled off. In addition, since the welding wire is usually wound and stored, the wire itself has a bending tendency, and the feeding section varies due to the bending tendency until the wire is fed to the contact tip, and the arc is not broken. Since it becomes stable, a welding torch
3-80978) and contact chips (JP-A-4-29).
4870) and the like are well known.
【０００４】溶接トーチ（特開昭６３−８０９７８）で
は、以下のように提案されている。使用する溶接ワイヤ
径に適したチップ母材間距離（例えば、ワイヤ径０．９
ｍｍであれば、１０ｍｍ程度）で溶接を行えば、上記の
ようなコンタクトチップを用いれば、耐久性・溶接品質
はかなり向上するものであった。ところが、薄板の溶接
時、部材の熱容量は比較的小さいにも関わらず、十分に
ワイヤ送給量（溶着量）が必要な場合、通常の溶接法
（ワイヤ送給量と溶接電流とが一義的に決定されている
前記ＭＩＧ、ＭＡＧ溶接法）では部材が溶け落ちる問題
が発生する。特に、溶接部位に隙間が存在している場
合、隙間分を埋める溶着量が必要となるため、部材板厚
に適した溶着量以上に溶接ワイヤを送り込む必要があ
る。この送給溶着量では、入熱量が部材の熱容量以上と
なり溶け落ちが生じる。A welding torch (Japanese Patent Laid-Open No. 63-80978) has been proposed as follows. The distance between the tip base materials suitable for the diameter of the welding wire used (for example, wire diameter 0.9
If the welding is carried out at 10 mm, the durability and welding quality will be considerably improved by using the above contact tip. However, when welding a thin plate, even if the heat capacity of the member is relatively small, if a sufficient wire feed amount (welding amount) is required, the normal welding method (wire feed amount and welding current is unique In the above MIG and MAG welding methods determined in (1), the problem that the member melts down occurs. In particular, when there is a gap at the welded portion, a welding amount that fills the gap is required, so it is necessary to feed the welding wire in excess of the welding amount suitable for the member plate thickness. With this feed welding amount, the amount of heat input exceeds the heat capacity of the member, causing burn-through.
【０００５】そこで、そのような場合に必要なワイヤ送
給量を確保し、部材への入熱量を抑えるために、チップ
母材間距離を通常の長さより長くすることで、ワイヤ突
き出し部によるジュール発熱を増加させ、アーク部での
発生熱量を抑えることが可能になる。たとえば、Ｏ．７
ｍｍの板厚の重ね隅肉において、溶接用ワイヤ０．９ｍ
ｍを使用して溶接を行う場合、チップ母材間距離は１０
ｍｍ程度を採用し、溶接速度を７００ｍｍ／分、溶接電
流７５Ａ程度で溶接を行えば、許容隙間は高々板厚の１
／２程度となる。ところが、チップ母材間距離を２０ｍ
ｍ程度まで長くすると、許容隙間量は板厚の２倍以上ま
で広がる。しかし、チップ母材間距離を１０ｍｍから２
０ｍｍに長くすると、ワイヤが収納されているワイヤボ
ビンやワイヤぺール缶での曲がり癖があるため、ワイヤ
先端が２ｍｍから３ｍｍの幅でばらつきが発生して、本
来の溶接線からはずれて所望の溶接品質を確保すること
ができなくなる。そこで、このような問題点を解決する
ために、溶接トーチ（特開昭６３−８０９７８）では、
給電チップ前方に耐熱性・耐磨耗性かつ耐熱衝撃性を有
する絶縁性からなるワイヤガイドを付加している。確か
に、このワイヤガイドを付加することで、ことで、この
ワイヤガイドから送給されたワイヤ先端での位置は従来
コンタクトチップに比べ１／５から１／１０程度の幅に
収まり、本来の溶接線からはずれるといった問題点は解
決される。また、溶接ワイヤ自体にボビン巻きやペール
缶に収納された巻き癖が存在しているため、その巻癖が
あっても強制的に給電部の一部で給電されるようにワイ
ヤ先端ガイド部の孔中心を偏心させる構造を設けてい
る。Therefore, in such a case, in order to secure the required wire feeding amount and suppress the amount of heat input to the member, the distance between the chip base materials is made longer than the normal length, so that the joule by the wire protruding portion is formed. It is possible to increase heat generation and suppress the amount of heat generated in the arc portion. For example, O. 7
Welding wire 0.9 m in lap fillet with mm thickness
When welding using m, the distance between the chip base materials is 10
If the welding speed is 700 mm / min and the welding current is about 75 A, the allowable clearance is at most 1 mm of the plate thickness.
/ 2. However, the distance between the chip base materials is 20m
When the length is increased to about m, the allowable gap amount becomes more than twice the plate thickness. However, the distance between the chip base materials is 10mm to 2
If the length is set to 0 mm, the wire bobbin and the wire pail can that contain the wire will have a bending tendency, so the wire tip will vary from 2 mm to 3 mm in width, and it will deviate from the original welding line and the desired welding The quality cannot be secured. Then, in order to solve such a problem, in a welding torch (Japanese Patent Laid-Open No. 63-80978),
A wire guide made of insulating material with heat resistance, abrasion resistance, and thermal shock resistance is added in front of the power feed chip. Certainly, by adding this wire guide, the position at the tip of the wire fed from this wire guide will be within the width of about 1/5 to 1/10 compared to the conventional contact tip, and the original welding Problems such as deviation from the line are solved. In addition, since the welding wire itself has a winding tendency stored in a bobbin winding or a pail can, even if there is such a winding tendency, power is forcibly supplied by a part of the power feeding section, A structure is provided to make the center of the hole eccentric.
【０００６】また、同様に給電部を安定化させるため
に、アーク溶接用トーチの給電チップ（特開平４−２９
４８７０）として、紹介されている。即ち、給電チップ
内にチップ根元側及び先端側に２つの空洞部を設けて、
この空洞部の間に給電部を設け、送給されてくるワイヤ
の曲がり癖を利用して、使用初期状態からでも安定して
給電されるように工夫している。さらに、非導電性の耐
磨耗性部材で形成されたワイヤガイド部を有すること
で、送給されたワイヤ先端での位置を確保できるような
工夫がなされている。また、前述した問題以外に、現状
送給されて来る溶接ワイヤはコンタクトチップで給電さ
れる状態が不安定であるため、アークが不安定となり、
所望の溶接品質を確保できない問題が存在する。即ち、
コンタクトチップ（特開平４−２９４８７０）の構造を
工夫したやり方が提案されている。Similarly, in order to stabilize the power feeding portion, a power feeding tip of an arc welding torch (Japanese Patent Laid-Open No. 4-29).
4870). That is, two cavity parts are provided on the tip side and the tip side in the feeding chip,
A power feeding portion is provided between the hollow portions to utilize the bending tendency of the fed wire so that the power can be stably fed even from the initial state of use. Further, by having a wire guide portion formed of a non-conductive abrasion resistant member, a device for ensuring a position at the tip of the fed wire has been devised. In addition to the problems described above, the welding wire that is currently being fed is unstable in the state of being fed by the contact tip, so the arc becomes unstable,
There is a problem that the desired welding quality cannot be ensured. That is,
A method in which the structure of the contact chip (Japanese Patent Laid-Open No. 4-294870) is devised has been proposed.
【０００７】[0007]
【発明が解決しようとする課題】確かに、溶接トーチ
（特開昭６３−８０９７８）では、ワイヤガイドから送
給されたワイヤ先端での位置は従来コンタクトチップに
比べ１／５から１／１０程度の幅に収まり、本来の溶接
線からはずれるといった問題点は解決される。また、ワ
イヤガイド部の孔位置が偏心しているので、送給されく
るワイヤの給電位置が安定しアークの安定化が図れる。
しかしながら、送給されてくるワイヤは先に給電部で給
電され、ワイヤの抵抗分でジュール発熱しているため、
ワイヤ自体が軟化している。従って、この状態で送給さ
れてきたワイヤは、コンタクトチップ先端の偏心したガ
イド部で経路が強制されるため、給電部で溶着する第１
の問題が発生する。また、チップ先端部に偏心させたガ
イドが存在するため、トーチを一旦取り付けた状態で使
用する溶接ロボットのような自動機では、トーチの姿勢
等でワイヤ先端位置が異なってくる第２の問題が発生す
る。また、アーク溶接用トーチの給電チップ（特開平４
−２９４８７０）では、確かに、前述同様に給電部を安
定化させ、かつ送給されてくるワイヤのワイヤ先端部の
位置を安定化が図れる。しかし、溶接トーチ（特開昭６
３−８０９７８）と同様で、給電部より先端にガイド部
が存在するため、同様の第１の問題が発生する。Certainly, in the welding torch (Japanese Patent Laid-Open No. 63-80978), the position at the tip of the wire fed from the wire guide is about 1/5 to 1/10 that of the conventional contact tip. The problem that it falls within the width of the welding line and deviates from the original welding line is solved. Further, since the hole position of the wire guide portion is eccentric, the feeding position of the wire fed is stable and the arc can be stabilized.
However, the wire that is sent is first fed by the power supply unit, and Joule heat is generated due to the resistance of the wire.
The wire itself has softened. Therefore, since the route of the wire fed in this state is forced by the eccentric guide portion at the tip of the contact tip, the wire is welded at the power feeding portion.
Problems occur. In addition, since there is an eccentric guide at the tip of the tip, there is a second problem that the wire tip position is different depending on the attitude of the torch in an automatic machine such as a welding robot that is used with the torch once attached. appear. In addition, a power feeding tip of an arc welding torch (Japanese Patent Laid-Open No. Hei 4 (1999) -1999)
-294870), it is possible to stabilize the power feeding portion and stabilize the position of the wire tip portion of the fed wire in the same manner as described above. However, a welding torch (Japanese Patent Laid-Open No.
3-80978), since the guide portion is present at the tip of the power feeding portion, the same first problem occurs.
【０００８】本発明は上記問題点を解決するためになさ
れたものであり、その目的とするところは、薄板溶接で
の溶接裕度を大巾に向上させたアーク溶接用コンタクト
チップを提供することである。The present invention has been made to solve the above problems, and an object of the present invention is to provide a contact tip for arc welding in which the welding tolerance in thin plate welding is greatly improved. Is.
【０００９】[0009]
【課題を解決するための手段】上記目的を達成するため
の本発明の溶接用コンタクトチップは、根元部に設けら
れる第１溶接ワイヤガイド部と、前記第１溶接ワイヤガ
イド部の先端側に設けられる溶接ワイヤ給電部と、前記
溶接ワイヤ給電部の先端側に設けられ、前記溶接ワイヤ
給電部の孔径と略同一の孔径を持ち、耐熱性を有する非
導電物材質で形成され、かつ、前記孔の長手方向の長さ
がワイヤ突き出し部によるジュール発熱を増加させてア
ーク部での発生熱量を抑えられる長さである第２溶接ワ
イヤガイド部と、前記第１ワイヤガイド部と前記溶接ワ
イヤ給電部との間に設けられ、溶接ワイヤ径と略同一か
大きい孔径を持ち、中心より偏芯した位置に孔を設け、
耐熱性を有する非導電材料で形成される第３の溶接ワイ
ヤガイド部をを設けことを特徴とするものである。ま
た、前記第３溶接ワイヤガイド部は着脱可能な構造を有
し、前記第３溶接ワイヤガイド部の孔は根元部側にテー
パ構造を有し、第３溶接ワイヤガイド部は、前記第１溶
接ワイヤガイド部とは固定されてない構造を有し、前記
第２溶接ワイヤガイド部は、前記溶接給電部に圧入され
ている構造を設けたことを特徴とするものである。A welding contact tip of the present invention for achieving the above object is provided with a first welding wire guide portion provided at a root portion and a tip side of the first welding wire guide portion. And a welding wire power feeding part to be provided, which is provided on the tip side of the welding wire power feeding part, has a hole diameter substantially the same as the hole diameter of the welding wire power feeding part, and is formed of a non-conductive material having heat resistance, and the hole. Second welding wire guide portion, the first wire guide portion, and the welding wire power feeding portion whose length in the longitudinal direction is a length that can increase Joule heat generation by the wire protruding portion and suppress the amount of heat generated in the arc portion. Is provided between the welding wire diameter and the welding wire diameter, and has a hole diameter that is substantially the same as or larger than the welding wire diameter
A third welding wire guide portion formed of a non-conductive material having heat resistance is provided. The third welding wire guide portion has a detachable structure, the hole of the third welding wire guide portion has a taper structure on the root side, and the third welding wire guide portion is the first welding wire. The wire guide portion has a structure that is not fixed, and the second welding wire guide portion is provided with a structure that is press-fitted into the welding power feeding portion.
【００１０】また、第２の発明では、前述の中心より偏
芯した位置に孔を設ける代わりに、根元側から先端側へ
斜めに穿孔された、耐熱性を有する非導電材料で形成さ
れる第３の溶接ワイヤガイド部とするものである。In the second aspect of the invention, instead of forming the hole at a position eccentric from the center, the hole is formed diagonally from the root side to the tip side and is formed of a heat-resistant non-conductive material. 3 is a welding wire guide portion.
【００１１】[0011]
【発明の実施の形態】以下、本発明のアーク溶接用コン
タクトチップの実施例を掲げてより具体的に説明する
が、これにより本発明は何ら限定されるものではない。
まず、発明をより明確化するため、再度、図３に示した
従来の溶接用コンタクトチップの問題点を明確にしてお
く。図に示されるように、根元部に設けられた第１溶接
ワイヤガイド部１と、溶接ワイヤ給電部２と、その先端
部に第２溶接ワイヤガイド部３で構成されている。従っ
て、この構成では、送給されてくる溶接ワイヤの曲がり
癖は全く矯正されることなく溶接ワイヤ給電部２で給電
されるため、給電点がばらつき結果としてアークが非常
に不安定になる。次に、図１に本出願の溶接用コンタク
トチップの構造図を示す。図に示されるように、根元部
に設けられる第１溶接ワイヤガイド部１と、前記第１溶
接ワイヤガイド部１は根元部と先端部とで２種類の孔径
を設け、その２種類の孔の境界部はテーパ構造であり、
根元部側の孔径が大きい区間に、溶接ワイヤの径よりや
や大きい孔径を有し、前記第１溶接ワイヤガイド部の中
心からずれた位置に孔を設けた、即ち、偏芯した位置に
孔を設け、耐熱性・耐摩耗性を有する非導電物材質で形
成される第３溶接ワイヤガイド４を設けている。この第
３溶接ワイヤガイドは、根元部側の孔径の方が先端部よ
り孔径が小さいため先端側には移動できないようになっ
ている。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the arc welding contact tip of the present invention will be described in more detail with reference to examples, but the present invention is not limited thereto.
First, in order to further clarify the invention, the problem of the conventional welding contact tip shown in FIG. 3 will be clarified again. As shown in the figure, it is composed of a first welding wire guide portion 1 provided at the base portion, a welding wire power feeding portion 2, and a second welding wire guide portion 3 at the tip thereof. Therefore, in this configuration, since the bending tendency of the fed welding wire is not corrected at all and electric power is fed by the welding wire feeding portion 2, the feeding point varies and the arc becomes very unstable. Next, FIG. 1 shows a structural diagram of a welding contact tip of the present application. As shown in the figure, the first welding wire guide portion 1 provided at the root portion and the first welding wire guide portion 1 are provided with two kinds of hole diameters at the root portion and the tip portion, and The boundary has a tapered structure,
A section having a large hole diameter on the root side has a hole diameter slightly larger than the diameter of the welding wire, and a hole is provided at a position deviated from the center of the first welding wire guide portion, that is, a hole is provided at an eccentric position. A third welding wire guide 4 formed of a non-conductive material having heat resistance and wear resistance is provided. This third welding wire guide cannot move to the tip side because the hole diameter on the root side is smaller than the hole diameter on the tip side.
【００１２】次に、前記第１溶接ワイヤガイド部の先端
側に溶接ワイヤ給電部２を設け、その前記第１溶接ワイ
ヤガイド部と溶接ワイヤ給電部との境界部はテーパ構造
とし、前記溶接ワイヤ給電部は、約３ｍｍから１０ｍｍ
程度の長さであり、前記溶接ワイヤ給電部の先端側に溶
接ワイヤ給電部の孔径と略同一の孔径を持ち、耐熱性・
耐摩耗性を有する非導電物材質で形成される第２溶接ワ
イヤガイド部３を設け、両部境界部には隙間のほとんど
ないように、第２溶接ワイヤガイド部はコンタクトチッ
プ本体に圧入加工されたものである。溶接内溶接ワイヤ
給電部５と同一である。第２溶接ワイヤガイド部３はチ
ップ母材間距離が通常より長くなっても、ワイヤ６先端
がまっすぐ送給されるように、非導電物で耐摩耗性と耐
熱性（例えば８００°Ｃ以上）のある材質（例えば機械
加工が可能なセラミックや窒化珪素系のセラミック）で
形成され、第１溶接ワイヤガイド部１に圧入装着されて
いる。また、このガイドは、使用する溶接用ワイヤの径
に合わせて、所望の長さが選択されるように作られてい
る。第２溶接ワイヤガイド部の穿孔部分の長さがチップ
母材間距離を長くしたい距離（例えば２０ｍｍ）に相当
し、チップ母材間距離を通常の長さより長くすること
で、部材への入熱量を抑え、ワイヤ突き出し部によるジ
ュール発熱を増加させ、アーク部での発生熱量を抑える
ことが可能になる。当然、給電部でワイヤ自体がジュー
ル発熱で軟化したワイヤも、給電部と第２溶接ワイヤガ
イド部は同一軸芯上であり、孔径も略同一かやや大きめ
のため、途中で座屈することなく、ワイヤ先端部の位置
も安定して送給されて、溶接を行うことが可能となる。
つまり、アークを安定させ、ワイヤ突き出し長によるジ
ュール熱とアーク熱との比率を変えたことになる。従っ
て、薄板溶接に於いて、隙間発生箇所でも通常の溶接部
でも溶け落ちを発生させることなく溶接が可能となる。
更に、第３溶接ワイヤガイド部によって、常に給電部の
根元側で給電されるため、給電が安定し、結果としてア
ークを安定させることができる。特に、薄板溶接時では
電流値が低くまた、使用するワイヤも細い径のワイヤ
（例えば、０．９Ф）のため、給電点を安定させ、アー
クを安定させることが重要である。また、第３溶接ワイ
ヤガイド部はコンタクトチップ本体とは固定されていな
いため、送給されてくるワイヤの曲がり癖によるねじれ
が発生しても、給電部の根元側の円周方向に少しづつ回
転しながら摩耗した給電部の根元側で馴染んで、給電さ
れるため、給電部／母材間の距離は従来に比べて大幅に
変化することなく、アークを発生させることができる。
結果として、給電部での根元側に於いては偏摩耗するこ
となく、常に円周方向に摩耗が進み、コンタクトチップ
先端側に進んで行くため、コンタクトチップ本体の寿命
も偏摩耗しない分延びることになる。Next, a welding wire feeding portion 2 is provided on the tip side of the first welding wire guiding portion, and a boundary portion between the first welding wire guiding portion and the welding wire feeding portion has a taper structure, and the welding wire is formed. Power supply unit is about 3 mm to 10 mm
The length of the welding wire is about the same as the diameter of the welding wire feeding part on the tip side of the welding wire feeding part,
A second welding wire guide portion 3 formed of a non-conductive material having wear resistance is provided, and the second welding wire guide portion is press-fitted into the contact tip body so that there is almost no gap at the boundary between both portions. It is a thing. It is the same as the welding wire power feeding part 5 in the welding. The second welding wire guide part 3 is a non-conductive material so that the tip of the wire 6 is fed straight even if the distance between the tip base materials is longer than usual, and is wear resistant and heat resistant (for example, 800 ° C or higher). It is formed of a certain material (for example, a machinable ceramic or a silicon nitride-based ceramic), and is press-fitted and attached to the first welding wire guide portion 1. Further, this guide is made so that a desired length is selected according to the diameter of the welding wire used. The length of the perforated portion of the second welding wire guide portion corresponds to the distance (for example, 20 mm) where the distance between the tip base materials is desired to be increased, and the amount of heat input to the member is increased by making the distance between the tip base materials longer than the normal length. It is possible to suppress the amount of heat generated in the arc portion by increasing the Joule heat generated by the wire protruding portion. As a matter of course, even in the wire where the wire itself is softened by Joule heat generation in the power supply part, the power supply part and the second welding wire guide part are on the same axis, and the hole diameters are substantially the same or slightly larger, so buckling does not occur in the middle The position of the wire tip is also stably fed, and welding can be performed.
That is, the arc is stabilized and the ratio of the Joule heat to the arc heat due to the wire protrusion length is changed. Therefore, in thin plate welding, it is possible to perform welding without causing burn-through at a gap generation portion or a normal welding portion.
Further, since the third welding wire guide portion always feeds power at the base side of the power feeding portion, the power feeding is stable, and as a result, the arc can be stabilized. In particular, when welding thin plates, the current value is low and the wire used is a wire with a small diameter (for example, 0.9 Φ), so it is important to stabilize the feeding point and stabilize the arc. In addition, since the third welding wire guide is not fixed to the contact tip body, even if twisting occurs due to the bending tendency of the wire being fed, it gradually rotates in the circumferential direction on the base side of the power feeding part. However, since the power is fed to the base side of the worn power supply unit, the arc can be generated without the distance between the power supply unit and the base material changing significantly compared to the conventional case.
As a result, there is no uneven wear on the root side of the power feeding part, and wear progresses in the circumferential direction at all times, and progresses toward the tip side of the contact tip. become.
【００１３】図２は、第２の発明であり、前述の中心よ
り偏芯した位置に孔を設ける代わりに、根元側から先端
側へ斜めに穿孔された、耐熱性を有する非導電材料で形
成される第３の溶接ワイヤガイド部としたものである。FIG. 2 shows a second aspect of the present invention, which is formed of a heat-resistant non-conductive material which is formed by obliquely punching from the root side to the tip side instead of providing the holes at positions eccentric from the center. The third welding wire guide portion is used.
【００１４】本発明のポイントは、前記溶接ワイヤ給電
部２よりもコンタクトチップの根元側にワイヤの送給経
路を軸芯から偏芯させて（または、根元側から先端側へ
斜めに穿孔されたものとして）、前記溶接給電部の根元
側に溶接ワイヤを強制的に接触させることができる耐熱
性・耐摩耗性・非導電物材質で形成された第３の溶接ワ
イヤガイド部４を付加している点にある。なお、前述し
たように、コンタクトチップの先端部にセラミックス製
キャップを嵌着したものは公知であり、チップ母材間距
離を通常の長さより長くすることで、ワイヤ突き出し部
によるジュール発熱を増加させ、アーク部での発生熱量
を抑えるという点でも、公知である。しかし、本発明の
ように、チップ母材間距離を通常の長さより長くした溶
接に於いて、溶接給電部を安定させ、給電後通常溶接時
よりもジュール発熱で軟化したワイヤがコンタクトチッ
プ内で溶着することなく溶接ができるところに着目した
アーク溶接用コンタクトチップ例はない。The point of the present invention is to make the wire feeding path eccentric from the axial center to the root side of the contact tip with respect to the welding wire power feeding section 2 (or to perforate the wire obliquely from the root side to the tip side). As a material), by adding a third welding wire guide portion 4 formed of a heat resistant / abrasion resistant / non-conductive material capable of forcibly contacting a welding wire to the root side of the welding power feeding portion. There is a point. As described above, it is known that the tip of the contact tip is fitted with a ceramic cap, and the Joule heat generated by the wire protruding portion is increased by making the distance between the tip base materials longer than the normal length. Also, it is known from the viewpoint of suppressing the amount of heat generated in the arc portion. However, as in the present invention, in welding in which the distance between the tip base materials is longer than the normal length, the welding power feeding portion is stabilized, and the wire softened by Joule heat generation after the power feeding is higher in the contact tip than in the normal welding. There is no example of a contact tip for arc welding that focuses on the fact that welding can be performed without welding.
【００１５】[0015]
【発明の効果】以上の説明から明らかなように、本発明
のアーク溶接用コンタクトチップは、ワイヤ先端位置の
ばらつきを従来程度に抑えると共に、通常のチップ母材
間距離より長く設定しても給電部が安定化し、ワイヤの
抵抗分のジュール発熱でワイヤが軟化してもチップ溶着
することなく、溶接が可能となる。従って、従来より部
材の溶け落ちを発生させることなく、ワイヤ送給量を増
加させることが可能になるため、薄板溶接に於いての溶
接裕度を飛躍的に拡大することができる。特に、薄板溶
接時には、どうしても隙間の外乱排除が難しいため、こ
れらの隙間が発生しても、特殊な溶接電源等を使用せず
に本コンタクトチップを使用するだけで、安定した溶接
品質を確保できる。また、チップ先端部に非導電物で耐
摩耗性の材質を採用しているため、チップ先端へのスパ
ッタの付着を著しく抑制することができ、さらにチップ
先端でのワイヤとチップとの溶着も同時に著しく抑制す
ることもでき、従来構造チップに比べて効果が絶大であ
る。さらに、溶接給電部に関しても、給電される前に溶
接ワイヤの送給経路がコンタクトチップの孔中心から偏
芯された固定されていないガイドによって給電部根元側
で給電させるため、つねに給電部根元側から給電による
摩耗が成長するため従来のコンタクトチップで問題とな
っていた偏摩耗が全く解消されてコンタクトチップの寿
命自体を飛躍的に向上する。As is clear from the above description, the contact tip for arc welding of the present invention suppresses the variation in the position of the wire tip to the level of the conventional one, and supplies power even if it is set longer than the normal distance between the tip base materials. The portion is stabilized, and even if the wire is softened due to Joule heat generation due to the resistance of the wire, welding is possible without chip welding. Therefore, since it is possible to increase the wire feed amount without causing the member to burn through, it is possible to dramatically increase the welding margin in thin plate welding. In particular, when welding thin plates, it is difficult to eliminate disturbances in the gap, so even if these gaps occur, stable welding quality can be secured by using this contact tip without using a special welding power source. . In addition, since a non-conductive and wear-resistant material is used for the tip of the tip, it is possible to significantly suppress the adhesion of spatter to the tip of the tip, and also to weld the wire and the tip at the tip at the same time. It can be remarkably suppressed, and the effect is great as compared with the conventional structure chip. Furthermore, with regard to the welding power supply part, the power supply path of the welding wire is fed before the power is supplied by the unfixed guide that is eccentric from the hole center of the contact tip, so that the power is always supplied at the base side of the power supply part. As a result, wear due to power supply grows, and uneven wear, which has been a problem in conventional contact chips, is completely eliminated, and the life of the contact chip itself is dramatically improved.
【図１】本発明の第１発明の溶接用コンタクトチップの
構造を示す図である。FIG. 1 is a diagram showing a structure of a contact tip for welding according to a first aspect of the present invention.
【図２】本発明の第２発明の溶接用コンタクトチップの
構造を示す図である。FIG. 2 is a view showing a structure of a welding contact tip according to a second invention of the present invention.
【図３】従来チップの代表的構造を示す図である。FIG. 3 is a diagram showing a typical structure of a conventional chip.
１ 第１溶接ワイヤガイド部 ２ 溶接ワイヤ給電部 ３ 第２溶接ワイヤガイド部 ４ 第３溶接ワイヤガイド部 1 1st welding wire guide part 2 welding wire power feeding part 3 2nd welding wire guide part 4 3rd welding wire guide part
───────────────────────────────────────────────────── フロントページの続き (72)発明者 満塩 孝文 福岡県北九州市八幡西区黒崎城石２番１号 株式会社安川電機内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takafumi Mitsuo 2-1, Kurosaki Shiroishi, Yawatanishi-ku, Kitakyushu, Fukuoka Prefecture Yasukawa Electric Co., Ltd.
Claims (6)
ンタクトチップにおいて、 根元部に設けられる第１溶接ワイヤガイド部と、 前記第１溶接ワイヤガイド部の先端側に設けられる溶接
ワイヤ給電部と、 前記溶接ワイヤ給電部の先端側に設けられ、前記溶接ワ
イヤ給電部の孔径と略同一の孔径を持ち、耐熱性を有す
る非導電物材質で形成され、かつ、前記孔の長手方向の
長さがワイヤ突き出し部によるジュール発熱を増加させ
てアーク部での発生熱量を抑えられる長さである第２溶
接ワイヤガイド部と、 前記第１ワイヤガイド部と前記溶接ワイヤ給電部との間
に設けられ、溶接ワイヤ径と略同一か大きい孔径を持
ち、根元側から先端側へ斜めに穿孔された、耐熱性を有
する非導電材料で形成される第３の溶接ワイヤガイド部
を設けたことを特徴とするア−ク溶接用コンタクトチッ
プ。1. A contact tip used in gas shielded arc welding, comprising: a first welding wire guide portion provided at a root portion; a welding wire power feeding portion provided at a tip side of the first welding wire guide portion; It is provided on the distal end side of the welding wire feeding part, has a hole diameter substantially the same as the hole diameter of the welding wire feeding part, and is formed of a non-conductive material having heat resistance, and the length of the hole in the longitudinal direction is the wire. A second welding wire guide portion having a length capable of increasing Joule heat generated by the protruding portion and suppressing the amount of heat generated in the arc portion, and is provided between the first wire guide portion and the welding wire power feeding portion, and welding is performed. A third welding wire guide portion having a hole diameter substantially the same as or larger than the wire diameter and obliquely drilled from the root side to the tip side and formed of a non-conductive material having heat resistance is provided. A wherein - click welding contact tip.
ンタクトチップにおいて、 根元部に設けられる第１溶接ワイヤガイド部と、 前記第１溶接ワイヤガイド部の先端側に設けられる溶接
ワイヤ給電部と、 前記溶接ワイヤ給電部の先端側に設けられ、前記溶接ワ
イヤ給電部の孔径と略同一の孔径を持ち、耐熱性を有す
る非導電物材質で形成され、かつ、前記孔の長手方向の
長さがワイヤ突き出し部によるジュール発熱を増加させ
てアーク部での発生熱量を抑えられる長さである第２溶
接ワイヤガイド部と、 前記第１ワイヤガイド部と前記溶接ワイヤ給電部との間
に設けられ、溶接ワイヤ径と略同一か大きい孔径を持
ち、中心より偏芯した位置に孔を設け、耐熱性を有する
非導電材料で形成される第３の溶接ワイヤガイド部をを
設けことを特徴とするア−ク溶接用コンタクトチップ。2. A contact tip used in gas shielded arc welding, comprising: a first welding wire guide portion provided at a root portion; a welding wire power feeding portion provided at a tip side of the first welding wire guide portion; It is provided on the distal end side of the welding wire feeding part, has a hole diameter substantially the same as the hole diameter of the welding wire feeding part, and is formed of a non-conductive material having heat resistance, and the length of the hole in the longitudinal direction is the wire. A second welding wire guide portion having a length capable of increasing Joule heat generated by the protruding portion and suppressing the amount of heat generated in the arc portion, and is provided between the first wire guide portion and the welding wire power feeding portion, and welding is performed. It has a hole diameter that is about the same as or larger than the wire diameter, is provided with a hole at a position eccentric from the center, and is provided with a third welding wire guide portion made of a non-conductive material having heat resistance. To A - click welding contact tip.
な構造を有する請求項１または２記載のア−ク溶接用コ
ンタクトチップ。3. The arc welding contact tip according to claim 1, wherein the third welding wire guide portion has a detachable structure.
部側にテーパ構造を有する請求項１または２記載のア−
ク溶接用コンタクトチップ。4. The aperture according to claim 1, wherein the hole of the third welding wire guide portion has a taper structure on the root side.
Contact tip for welding.
１溶接ワイヤガイド部とは固定されてない構造を有する
請求項１または２記載のア−ク溶接用コンタクトチッ
プ。5. The arc welding contact tip according to claim 1, wherein the third welding wire guide portion has a structure not fixed to the first welding wire guide portion.
接給電部に圧入されている構造を有する請求項１または
２記載のア−ク溶接用コンタクトチップ。6. The contact tip for arc welding according to claim 1, wherein the second welding wire guide portion has a structure press-fitted into the welding power feeding portion.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13085796A JPH09295151A (en) | 1996-04-26 | 1996-04-26 | Contact tip for arc welding |
| PCT/JP1997/001060 WO1997040956A1 (en) | 1996-04-26 | 1997-03-28 | Contact tip for arc welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13085796A JPH09295151A (en) | 1996-04-26 | 1996-04-26 | Contact tip for arc welding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09295151A true JPH09295151A (en) | 1997-11-18 |
Family
ID=15044327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13085796A Pending JPH09295151A (en) | 1996-04-26 | 1996-04-26 | Contact tip for arc welding |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH09295151A (en) |
| WO (1) | WO1997040956A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381923B2 (en) | 2001-11-07 | 2008-06-03 | Migfast Pty Ltd | Consumable electrode arc welding |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2002336817B2 (en) * | 2001-11-07 | 2007-08-09 | Migfast Pty Ltd | Improved consumable electrode Arc welding |
| WO2003039801A1 (en) * | 2001-11-09 | 2003-05-15 | A.I.O.S Co., Ltd. | Wire guide for welding and contact tip for welding |
| CN109693021A (en) * | 2018-12-06 | 2019-04-30 | 上海励准精密零件有限公司 | The ignition tip of hard alloy and copper embedded structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57116381U (en) * | 1981-01-05 | 1982-07-19 | ||
| US4590358A (en) * | 1984-10-04 | 1986-05-20 | Unimation, Inc. | Apparatus for electrically isolated hot wire surfacing processes |
| JPS61122077U (en) * | 1985-01-17 | 1986-08-01 | ||
| JPH05261551A (en) * | 1992-03-16 | 1993-10-12 | Kobe Steel Ltd | Contact tip |
-
1996
- 1996-04-26 JP JP13085796A patent/JPH09295151A/en active Pending
-
1997
- 1997-03-28 WO PCT/JP1997/001060 patent/WO1997040956A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381923B2 (en) | 2001-11-07 | 2008-06-03 | Migfast Pty Ltd | Consumable electrode arc welding |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1997040956A1 (en) | 1997-11-06 |
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