JP6744539B2

JP6744539B2 - Contact tip

Info

Publication number: JP6744539B2
Application number: JP2016207345A
Authority: JP
Inventors: 蕗澤　武夫; 武夫蕗澤
Original assignee: Shinkokiki Co Ltd
Current assignee: Shinkokiki Co Ltd
Priority date: 2016-10-04
Filing date: 2016-10-04
Publication date: 2020-08-19
Anticipated expiration: 2036-10-04
Also published as: JP2018058105A

Description

本発明は、溶接ワイヤを案内するとともに、溶接電流を供給するアーク溶接用のコンタクトチップに関するものである。 The present invention relates to a contact tip for arc welding that guides a welding wire and supplies a welding current.

従来、アーク溶接用のコンタクトチップとしては、図４に示すように、銅合金製のコンタクトチップ５１の中心軸方向に溶接ワイヤの挿通孔５２を貫通形成しており、この挿通孔５２に溶接ワイヤを挿通し、溶接ワイヤを先端方向に送りながら、挿通孔５２の壁面に接触するによって溶接ワイヤに通電し、溶接していた。（例えば、特許文献１参照） Conventionally, as a contact tip for arc welding, as shown in FIG. 4, an insertion hole 52 for a welding wire is formed through the contact tip 51 made of a copper alloy in the central axis direction. The welding wire was energized by contacting the wall surface of the insertion hole 52 while passing the welding wire in the distal direction while the welding wire was passed through. (For example, see Patent Document 1)

特開２００９−０９０３５５号JP-A-2009-090355

前記のものでは、溶接ワイヤとして、ソリッドワイヤ、フラックス入りワイヤ、アルミワイヤ等の種類があり、同じ線径の溶接ワイヤでも、アルミワイヤとアルミワイヤ以外のソリッドワイヤ、フラックス入りワイヤ等（以下ソリッドワイヤ等と言う。）では、ソリッドワイヤ等よりアルミワイヤの送給性が悪いので、コンタクチップの孔径が異なり、例えば、φ１．２の溶接ワイヤの場合、コンタクトチップの挿通孔５１の孔径はソリッドワイヤ等ではφ１．３５であるのに対してアルミワイヤでは１．４０であり、１つの線径の溶接ワイヤに対して挿通孔５１の孔径が異なる２種類のコンタクトチップを用意しなければならないという問題があった。また、用意されている２種類のコンタクトチップを間違えて使用すると、溶接ワイヤの送給不良や通電不良による溶接不良となることがあるという問題があった。 In the above, there are various types of welding wire such as solid wire, flux-cored wire, aluminum wire, etc. Even if the welding wire has the same wire diameter, aluminum wire and solid wire other than aluminum wire, flux-cored wire, etc. Since the feedability of the aluminum wire is worse than that of the solid wire or the like, the hole diameter of the contact tip is different. For example, in the case of φ1.2 welding wire, the hole diameter of the insertion hole 51 of the contact tip is the solid wire. And the like, the diameter is φ1.35, whereas that of aluminum wire is 1.40. Therefore, it is necessary to prepare two types of contact tips with different diameters of the insertion holes 51 for a welding wire of one wire diameter. was there. In addition, there is a problem that if two kinds of prepared contact tips are used by mistake, welding failure may occur due to poor feeding of the welding wire or defective conduction.

本発明は、前記の問題を解決し、同じ線径の溶接ワイヤに対してはソリッドワイヤ等とアルミワイヤを１種類のコンタクトチップで共用でき、また使用するコンタクトチップを間違える恐れのないコンタクトチップを提供することを目的になされたものである。 The present invention solves the above-mentioned problems, and for a welding wire of the same wire diameter, a solid wire or the like and an aluminum wire can be shared by one type of contact tip, and a contact tip that can be used is not confused. It is intended to be provided.

上記課題を解決するためになされた本発明のコンタクトチップは、溶接ワイヤの挿通孔を、軸方向に貫通形成したコンタクトチップにおいて、ハウジングと、このハウジングに着脱可能に結合されたアダプターとから構成され、ハウジングには、先端に溶接ワイヤの線径に対応する第１の挿通孔を形成するとともに、第１の挿通孔に続く嵌入孔を形成し、前記アダプターには、先端に前記嵌入孔に嵌入される突起部を形成するとともに、前記第１の挿通孔と同径の第２の挿通孔と、第２の挿通孔に続く第２の挿通孔より大径の第３の挿通孔を形成し、前記ハウジングの嵌入孔にアダプターの突起部を嵌入して結合することによって、第１の挿通孔と、ハウジング２の第１の挿通孔の後端とアダプター３の突起部の先端との間に形成される空間部と、第２の挿通孔と、第３の挿通孔とによってコンタクトチップを貫通する挿通孔を形成したことを特徴とするものである。 The contact tip of the present invention made in order to solve the above-mentioned problems, in a contact tip in which an insertion hole of a welding wire is formed so as to penetrate therethrough in the axial direction, is composed of a housing and an adapter detachably coupled to the housing. , The housing has a first insertion hole corresponding to the wire diameter of the welding wire at the tip and a fitting hole continuing from the first insertion hole, and the adapter has a tip fitted into the fitting hole. And a second insertion hole having the same diameter as the first insertion hole and a third insertion hole larger in diameter than the second insertion hole following the second insertion hole. By inserting and coupling the protrusion of the adapter into the insertion hole of the housing, the first insertion hole is provided between the rear end of the first insertion hole of the housing 2 and the tip of the protrusion of the adapter 3. An insertion hole that penetrates the contact chip is formed by the formed space, the second insertion hole, and the third insertion hole.

本発明では、ハウジングと、このハウジングに着脱可能に結合されたアダプターとから構成され、ハウジングには、先端に溶接ワイヤの線径に対応する第１の挿通孔を形成するとともに、第１の挿通孔に続く嵌入孔を形成し、前記アダプターには、先端に前記嵌入孔に嵌入される突起部を形成するとともに、前記第１の挿通孔と同径の第２の挿通孔と、第２の挿通孔に続く第２の挿通孔より大径の第３の挿通孔を形成し、前記ハウジングの嵌入孔にアダプターの突起部を嵌入して結合することによって、第１の挿通孔と、ハウジング２の第１の挿通孔の後端とアダプター３の突起部の先端との間に形成される空間部と、第２の挿通孔と、第３の挿通孔とによってコンタクトチップを貫通する挿通孔を形成したので、同じ線径の溶接ワイヤに対してはソリッドワイヤ等とアルミワイヤとを１種類で共用できる。また使用するコンタクトチップを間違える恐れがなく、間違えることによる溶接ワイヤの送給不良や通電不良による溶接不良を防止できる効果がある。 According to the present invention, the housing includes a housing and an adapter detachably coupled to the housing. The housing has a first insertion hole corresponding to the wire diameter of the welding wire at the tip thereof, and the first insertion hole. A fitting hole that follows the hole is formed, and a protrusion that is fitted into the fitting hole is formed at the tip of the adapter, a second insertion hole having the same diameter as the first insertion hole, and a second insertion hole. A third insertion hole having a diameter larger than that of the second insertion hole following the insertion hole is formed, and the protrusion portion of the adapter is fitted into the fitting hole of the housing to be coupled to the first insertion hole and the housing 2. A space formed between the rear end of the first insertion hole and the tip of the protrusion of the adapter 3, a second insertion hole, and an insertion hole that penetrates the contact chip by the third insertion hole. Since it is formed, one kind of solid wire or the like and aluminum wire can be commonly used for welding wires having the same wire diameter. Further, there is no fear that the contact tip to be used is mistaken, and it is possible to prevent welding failure due to welding wire feeding failure or current conduction failure due to mistake.

本発明の実施の形態におけるコンタクトチップの断面図である。It is a sectional view of a contact tip in an embodiment of the invention. 図１の分解図である。It is an exploded view of FIG. 図２のＡ部の拡大図である。It is an enlarged view of the A section of FIG. 従来のコンタクトチップを示す断面図である。It is sectional drawing which shows the conventional contact tip.

以下、本発明の好ましい実施の形態について図１乃至図３に基づいて説明すると、１は銅合金製のコンタクトチップであり、コンタクトチップ１は、ハウジング２とこのハウジング２に着脱可能に結合されたアダプター３によって構成されている。 Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. 1 to 3. Reference numeral 1 is a copper alloy contact chip, and the contact chip 1 is detachably coupled to a housing 2 and the housing 2. It is configured by the adapter 3.

前記ハウジング２は、先端部に、溶接ワイヤ４の線径に対応した孔径の第１の挿通孔５が中心部軸方向に形成されるとともに、第１の挿通孔５に連通した大径の嵌入孔６が形成され、第１の挿通孔５と嵌入孔６にて、ハウジング２の中心部軸方向に貫通する貫通孔が形成され、また嵌入孔６の後部にはねじ部７が形成されている。 In the housing 2, a first insertion hole 5 having a hole diameter corresponding to the wire diameter of the welding wire 4 is formed in the axial direction of the central portion at the tip portion, and a large-diameter fitting that communicates with the first insertion hole 5 is inserted. A hole 6 is formed, a through hole penetrating in the central axial direction of the housing 2 is formed by the first insertion hole 5 and the fitting hole 6, and a screw portion 7 is formed at the rear part of the fitting hole 6. There is.

また、前記アダプター３は、先端に前記ハウジング２の嵌入孔６に嵌入される突起部８が形成され、この突起部８の後部外面には前記嵌入孔６のねじ部７に螺合されるねじ部９が形成されるとともに、アダプター３の後部には図示されていないトーチに螺合してコンタクトチップ１を取付けるねじ部１０が形成されており、突起部８の中心部軸方向にはハウジング２の第１の挿通孔５と同径の第２の挿通孔１１が形成されるとともに、第２の挿通孔１１に連通した第２の挿通孔１１より大径の第３の挿通孔１２が形成され、第２の挿通孔１１と第３の挿通孔１２にてアダプター３の中心部軸方向に貫通する貫通孔が形成されている。 Further, the adapter 3 is formed with a protrusion 8 which is fitted in the fitting hole 6 of the housing 2 at the tip, and a screw which is screwed into the threaded portion 7 of the fitting hole 6 on the rear outer surface of the protrusion 8. A portion 9 is formed, and a screw portion 10 for mounting the contact tip 1 by being screwed into a torch (not shown) is formed at the rear portion of the adapter 3, and the housing 2 is provided in the central axial direction of the protrusion portion 8. The second insertion hole 11 having the same diameter as the first insertion hole 5 is formed, and the third insertion hole 12 having a larger diameter than the second insertion hole 11 communicating with the second insertion hole 11 is formed. The second insertion hole 11 and the third insertion hole 12 form a through hole that penetrates the adapter 3 in the central axial direction.

次に、コンタクトチップ１の組立方法について説明すると、ハウジング２の嵌入孔６にアダプター３の突起部８を嵌め込み、ハウジング２の嵌入孔６のねじ部７にアダプター３の突起部８のねじ部９を螺合して、ハウジング２に］アダプター３を結合する。このとき、ハウジング２の第１の挿通孔５後端とアダプター３の突起部８の先端との間に空間部１３が形成されるようになっており、第１の挿通孔３と、空間部１３と、第２の挿通孔１０と、第３の挿通孔１１とでコンタクトチップ１を貫通する挿通孔が形成され、溶接ワイヤ４が挿通される。 Next, a method of assembling the contact tip 1 will be described. The protrusion 8 of the adapter 3 is fitted into the fitting hole 6 of the housing 2, and the threaded portion 9 of the projection 8 of the adapter 3 is fitted into the threaded portion 7 of the fitting hole 6 of the housing 2. Are screwed together and the adapter 3 is connected to the housing 2. At this time, a space 13 is formed between the rear end of the first insertion hole 5 of the housing 2 and the tip of the protrusion 8 of the adapter 3, and the first insertion hole 3 and the space 3 are formed. 13, the second insertion hole 10 and the third insertion hole 11 form an insertion hole that penetrates the contact tip 1, and the welding wire 4 is inserted therein.

尚、前記実施の形態では、溶接ワイヤの線径φ１．２に対して、第１の挿通孔５と第２の挿通孔１１の孔径はφ１．３５であり、第３の挿通孔１２の孔径はφ２となっており、また第１の挿通孔の長さ４ｍｍ、空間部の長さ５ｍｍ、第２の挿通孔の長さ１５ｍｍ、及び第３の挿通孔の長さ２０ｍｍである。 In the above embodiment, the diameter of the welding wire is φ1.2, the diameters of the first insertion hole 5 and the second insertion hole 11 are φ1.35, and the diameter of the third insertion hole 12 is Is φ2, and the length of the first insertion hole is 4 mm, the length of the space portion is 5 mm, the length of the second insertion hole is 15 mm, and the length of the third insertion hole is 20 mm.

本発明のコンタクトチップ１は、溶接ワイヤ４の挿通孔を、ソリッドワイヤ等の線径に対応する孔径の第１の挿通孔５と、第２の挿通孔１１と、第２の挿通孔１１に続く、第２の挿通孔１１より大径の第３の挿通孔１２と、第１の挿通孔５と第２の挿通孔１１との間に設けた空間部１３により形成したので、ソリッドワイヤ等の線径に対応する挿通孔５、１１を最小限の長さにし、その他の部分をソリッドワイヤ等に対応する挿通孔５、１１の孔径より大きくした挿通孔１２、１３としたので、ソリッドワイヤ等に対応した挿通孔のコンタクトチップにてアルミワイヤを使用でき、また、コンタクトチップ１先端の第１の挿通孔５と第２の挿通孔１１との間に空間部１３を設けたので、空間部１３の空気が電気的絶縁材及び断熱材の働きをするので、通電ポイントがハウジング２の短い第１の挿通孔５となり安定するので、コンタクトチップ１の寿命が長くなる。 In the contact tip 1 of the present invention, the insertion hole of the welding wire 4 is formed in the first insertion hole 5, the second insertion hole 11, and the second insertion hole 11 having a hole diameter corresponding to the wire diameter of the solid wire or the like. Since it is formed by the third insertion hole 12 having a larger diameter than the second insertion hole 11 and the space portion 13 provided between the first insertion hole 5 and the second insertion hole 11, a solid wire or the like is formed. The insertion holes 5 and 11 corresponding to the wire diameter of the solid wire are set to the minimum length, and the other portions are formed as the insertion holes 12 and 13 which are larger than the diameters of the insertion holes 5 and 11 corresponding to the solid wire or the like. Since an aluminum wire can be used in the contact tip having an insertion hole corresponding to the above, and the space portion 13 is provided between the first insertion hole 5 and the second insertion hole 11 at the tip of the contact chip 1, a space is provided. Since the air in the portion 13 acts as an electrical insulating material and a heat insulating material, the energization point becomes the short first insertion hole 5 of the housing 2 and becomes stable, so that the life of the contact tip 1 is extended.

以上のように、本発明では、ハウジング２と、このハウジング２に着脱可能に結合されたアダプター３とから構成され、ハウジング２には、その先端に溶接ワイヤ４の線径に対応する第１の挿通孔５を形成するとともに、第１の挿通孔５に続く嵌入孔６を形成し、前記アダプター３には、先端に前記嵌入孔６に嵌入される突起部８を形成するとともに、アダプター３に前記第１の挿通孔５と同径の第２の挿通孔１１と、第２の挿通孔１１に続く第２の挿通孔１１より大径の第３の挿通孔１２を形成し、前記ハウジング２の嵌入孔６にアダプター３の突起部８を嵌入して結合することによって、第１の挿通孔５と、ハウジング２の第１の挿通孔５の後端とアダプター３の突起部８の先端との間に形成される空間部１３と、第２の挿通孔１１と、第３の挿通孔１２とによってコンタクトチップ１を貫通する挿通孔を形成したので、同じ線径の溶接ワイヤ４に対してはソリッドワイヤ等とアルミワイヤを１種類で共用でき、また使用するコンタクトチップ１を間違える恐れがなく、間違えることによる溶接ワイヤ４の送給不良や通電不良による溶接不良を防止できる。 As described above, according to the present invention, the housing 2 and the adapter 3 detachably coupled to the housing 2 are provided, and the housing 2 has the first end corresponding to the wire diameter of the welding wire 4 at the tip thereof. The insertion hole 5 is formed, and a fitting hole 6 that follows the first insertion hole 5 is formed. A protrusion 8 that is fitted into the fitting hole 6 is formed at the tip of the adapter 3, and the adapter 3 is formed. The second insertion hole 11 having the same diameter as the first insertion hole 5 and the third insertion hole 12 having a larger diameter than the second insertion hole 11 following the second insertion hole 11 are formed, and the housing 2 By inserting and coupling the projection 8 of the adapter 3 into the insertion hole 6 of the first insertion hole 5, the rear end of the first insertion hole 5 of the housing 2 and the tip of the projection 8 of the adapter 3. Since the space portion 13 formed between the second insertion hole 11 and the third insertion hole 12 forms an insertion hole that penetrates the contact tip 1, the welding wire 4 having the same wire diameter is formed. The solid wire or the like and the aluminum wire can be shared by one type, and the contact tip 1 to be used can be prevented from being mistaken, and it is possible to prevent welding failure due to improper feeding of the welding wire 4 or improper energization.

また、コンタクトチップ１先端の第１の挿通孔５と第２の挿通孔１１との間に空間部１３を設けたので、空間部１３の空気が電気的絶縁材及び断熱材の働きをするので、通電ポイントがハウジング２の短い第１の挿通孔５となり安定するので、コンタクトチップの寿命が長くなる Further, since the space portion 13 is provided between the first insertion hole 5 and the second insertion hole 11 at the tip of the contact tip 1, the air in the space portion 13 acts as an electrical insulating material and a heat insulating material. Since the energizing point becomes the first insertion hole 5 having a short length in the housing 2 and is stable, the life of the contact tip is extended.

１コンタクトチップ
２ハウジング
３アダプター
４溶接ワイヤ
５第１の挿通孔
６嵌入孔
８突起部
１１第２の挿通孔
１２第３の挿通孔
１３空間部1 Contact Tip 2 Housing 3 Adapter 4 Welding Wire 5 First Insertion Hole 6 Insertion Hole 8 Projection 11 Second Insertion Hole 12 Third Insertion Hole 13 Space Part

Claims

A contact tip having an insertion hole for a welding wire penetrating in the axial direction is formed of a housing and an adapter detachably coupled to the housing. The housing has a tip that corresponds to the diameter of the welding wire. No. 1 insertion hole is formed, a fitting hole following the first insertion hole is formed, and the adapter is provided with a projection part to be fitted into the fitting hole at the tip, and the first insertion hole A second insertion hole having the same diameter and a third insertion hole having a diameter larger than that of the second insertion hole following the second insertion hole are formed, and the protrusion of the adapter is fitted into the fitting hole of the housing to be coupled. By doing so, the first insertion hole, the space formed between the rear end of the first insertion hole of the housing 2 and the tip of the protrusion of the adapter 3, the second insertion hole, and the third insertion hole. And a through hole for forming a through hole that penetrates the contact chip.