JP2019136768A - Contact tip - Google Patents

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Publication number
JP2019136768A
JP2019136768A JP2018033869A JP2018033869A JP2019136768A JP 2019136768 A JP2019136768 A JP 2019136768A JP 2018033869 A JP2018033869 A JP 2018033869A JP 2018033869 A JP2018033869 A JP 2018033869A JP 2019136768 A JP2019136768 A JP 2019136768A
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JP
Japan
Prior art keywords
tip
contact tip
insertion hole
contact
base material
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Pending
Application number
JP2018033869A
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Japanese (ja)
Inventor
蕗澤　武夫
Takeo Fukizawa
武夫 蕗澤
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Shinkokiki Co Ltd
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Shinkokiki Co Ltd
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Priority to JP2018033869A priority Critical patent/JP2019136768A/en
Publication of JP2019136768A publication Critical patent/JP2019136768A/en
Pending legal-status Critical Current

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Abstract

To provide a contact tip configured so that temperature rise of the contact tip caused by heat generated during welding can be suppressed and a deformation of a tip of the contact tip due to softening of a base material of the contact tip can be prevented.SOLUTION: A taper part 2a whose diameter gradually increases toward a tip thereof is formed at a tip part of an insertion hole 2 and an electric nickel plating film 6 is applied to a base material 5 of a contact tip 1.SELECTED DRAWING: Figure 1

Description

本発明は、アーク用溶接において、溶接用ワイヤを案内するとともに、溶接電流を供給する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 guiding a welding wire and supplying a welding current in arc welding.

従来、この種のコンタクトチップとして図４に示すように、銅、銅合金製のコンタクトチップの母材５１にニッケル・ボロンメッキ被膜５２を施し、このニッケル・ボロンメッキ被膜５２の上に超極圧潤滑剤のコーティング層５３を形成したものがあった。（例えば、特許文献１を参照）  Conventionally, as shown in FIG. 4, as this type of contact chip, a nickel / boron plating film 52 is applied to a base material 51 of a contact chip made of copper or copper alloy, and an ultra extreme pressure lubricant is formed on the nickel / boron plating film 52. The coating layer 53 was formed. (For example, see Patent Document 1)

特開２０１７−１８９８１６号公報JP 2017-189816 A

前記のものでは、メッキ被膜５２によってコンタクトチップの表面を硬化するとともに、超極圧潤滑剤のコーティング層５３によって、溶接用ワイヤの送り出しによる摩擦抵抗を大幅に小さくして溶接用ワイヤの挿通孔先端の変形を防止するものであるが、溶接時に発生する熱により、コンタクトチップの温度が上昇し母材５１が軟化して溶接ワイヤの送り出しによりコンタクトチップの挿通孔先端部が変形するという問題があった。  In the above, the surface of the contact tip is hardened by the plating film 52, and the frictional resistance due to the feeding of the welding wire is greatly reduced by the coating layer 53 of the super extreme pressure lubricant, so that the tip of the insertion hole of the welding wire is reduced. However, there is a problem that the temperature of the contact tip rises due to the heat generated during welding, the base material 51 is softened, and the tip of the insertion hole of the contact tip is deformed by feeding the welding wire. It was.

本発明は、前記の問題を解決し、溶接時に発生する熱によるコンタクトチップの温度上昇を抑制し、コンタクトチップの母材の軟化によるコンタクトチップ先端の変形を防止しすることができる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 provides a contact tip that solves the above-mentioned problems, suppresses the temperature rise of the contact tip due to heat generated during welding, and prevents deformation of the contact tip due to softening of the contact tip base material. It was made for the purpose of doing.

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、溶接用ワイヤを挿通する挿通孔を形成し、溶接用ワイヤを案内するとともに、溶接電流を供給するコンタクトチップにおいて、前記挿通孔の先端部に、先端に向けて大径となるテーパ部を形成するとともに、コンタクトチップの母材に電気ニッケルメッキ被膜を施したことを特徴とするものである。  The contact tip of the present invention made to solve the above-mentioned problems is a contact tip that forms an insertion hole for inserting a welding wire, guides the welding wire, and supplies a welding current. A taper portion having a large diameter toward the tip is formed in the portion, and an electric nickel plating film is applied to the base material of the contact chip.

本発明では、挿通孔の先端部に、先端に向けて大径となるテーパ部を形成するとともに、コンタクトチップの母材に電気ニッケルメッキ被膜を施したことにより、溶接時に発生する熱によるコンタクトチップの温度上昇を抑制することにより、温度上昇によるコンタクトチップの母材の軟化を防止し、挿通孔先端部の変形を防止できる効果がある。  In the present invention, the tip of the insertion hole is formed with a tapered portion having a large diameter toward the tip, and the contact nickel is coated on the base material of the contact tip. By suppressing the temperature rise, the softening of the base material of the contact tip due to the temperature rise can be prevented, and the deformation of the tip of the insertion hole can be prevented.

本発明の実施の形態のコンタクトチップの断面図である。It is sectional drawing of the contact chip of embodiment of this invention. 図１の先端部の拡大断面図である。It is an expanded sectional view of the front-end | tip part of FIG. 図１の被膜の状態を示す拡大断面図。The expanded sectional view which shows the state of the film of FIG. 従来例の被膜の状態を示す断面図である。It is sectional drawing which shows the state of the film of a prior art example.

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。  Hereinafter, preferred embodiments of the present invention will be described with reference to FIGS.

１は軸方向中心部を貫通する、図示されていない溶接用ワイヤを挿通する挿通孔２を形成したコンタクトチップであり、コンタクトチップ１の挿通孔２は先端部に先端が大径のテーパ部２ａが形成されている。尚、挿通孔２の本体部４の前半分の挿通孔部２ｂより本体部４の後半分の挿通孔部２ｃと取付け部３の挿通孔部２ｄの孔径が大きいとともに、取付け部３の基端部に溶接用ワイヤのガイド部２ｄが形成されている。  Reference numeral 1 denotes a contact tip formed with an insertion hole 2 that passes through a central portion in the axial direction and through which a welding wire (not shown) is inserted. The insertion hole 2 of the contact tip 1 has a tapered portion 2a having a large diameter at the tip. Is formed. The diameter of the insertion hole 2c in the rear half of the main body 4 and the insertion hole 2d of the attachment 3 are larger than the diameter of the insertion hole 2b in the front half of the main body 4 of the insertion hole 2, and the base end of the attachment 3 A welding wire guide part 2d is formed in the part.

挿通孔２のテーパ部について、図２に基づき詳細に説明すると、前記実施の形態では、φ１．２ｍｍの溶接用ワイヤ挿通孔の孔径Ａは１．２８ｍｍであり、先端の孔径Ｂはφ１．５ｍｍであり、またテーパ角Ｃは３０°に形成されている。  The taper portion of the insertion hole 2 will be described in detail with reference to FIG. 2. In the embodiment, the hole diameter A of the welding wire insertion hole of φ1.2 mm is 1.28 mm, and the hole diameter B of the tip is φ1.5 mm. The taper angle C is 30 °.

さらに、コンタクトチップ１の被膜について図３に基づき説明すると、導電性に優れた銅、銅合金製の母材５の表面にメッキ被膜６として電気ニッケルメッキ被膜が施され、メッキ被膜６の上から超極圧潤滑剤のコーティング層７が形成されている。尚、超極圧潤滑材のコーティング層７は必要に応じて形成すればよい。  Further, the coating of the contact chip 1 will be described with reference to FIG. 3. An electro nickel plating coating is applied as a plating coating 6 on the surface of the base material 5 made of copper or copper alloy having excellent conductivity. A coating layer 7 of a super extreme pressure lubricant is formed. The coating layer 7 of the super extreme pressure lubricant may be formed as necessary.

次に熱伝導について説明すると、溶接時に発生する熱がコンタクトチップ１に伝導される熱の多くは輻射熱によるものであり、遠赤外線の熱が内部に吸収され易いので、本発明では放射率の低い、即ち遠赤外線の反射率が高い電気ニッケルメッキ被膜６を施している。  Next, heat conduction will be described. Since most of the heat generated during welding is transferred to the contact tip 1 is due to radiant heat, far-infrared heat is easily absorbed inside, so that the emissivity is low in the present invention. That is, the nickel electroplating film 6 having a high far-infrared reflectance is applied.

メッキ被膜６として、従来は挿通孔２内部までほぼ均等の被膜が形成できるニッケル・ボロンメッキか無電解ニッケルメッキ等を施しており、電気ニッケルメッキは挿通孔２が細いため被膜が形成されないので採用されていないが、本発明では、挿通孔２先端をテーパ部２ａとすることにより、先端より数ミリ奥まで電解メッキ被膜６が施され、表面が硬化されるのでコンタクトチップ１の挿通孔２先端の変形を防止できる。  Conventionally, as the plating film 6, nickel / boron plating or electroless nickel plating which can form a substantially uniform film up to the inside of the insertion hole 2 is applied, and the electro nickel plating is adopted because the film is not formed because the insertion hole 2 is thin. However, in the present invention, by forming the tip of the insertion hole 2 as the tapered portion 2a, the electrolytic plating film 6 is applied to a depth of several millimeters from the tip and the surface is hardened. Deformation can be prevented.

以上のように、本発明では、挿通孔２の先端部に、先端に向けて大径となるテーパ部２ａを形成するとともに、コンタクトチップ１の母材５に電気ニッケルメッキ被膜６を施したことにより、溶接時に発生する熱によるコンタクトチップ１の温度上昇を抑制することにより、温度上昇によるコンタクトチップ１の母材５の軟化を防止し、挿通孔２先端部の変形を防止できコンタクトチップ１の交換時間を大幅に伸ばすことができる。  As described above, in the present invention, the tapered portion 2a having a large diameter toward the distal end is formed at the distal end portion of the insertion hole 2, and the electric nickel plating film 6 is applied to the base material 5 of the contact chip 1. By suppressing the temperature rise of the contact tip 1 due to heat generated during welding, it is possible to prevent the base material 5 of the contact tip 1 from being softened due to the temperature rise and to prevent the tip of the insertion hole 2 from being deformed. Exchange time can be greatly extended.

１ コンタクトチップ
２ 挿通孔
２ａ テーパ部
５ 母材
６ 電気メッキ被膜DESCRIPTION OF SYMBOLS 1 Contact tip 2 Insertion hole 2a Taper part 5 Base material 6 Electroplating film

Claims (1)

溶接用ワイヤを挿通する挿通孔を形成し、溶接用ワイヤを案内するとともに、溶接電流を供給するコンタクトチップにおいて、前記挿通孔の先端部に、先端に向けて大径となるテーパ部を形成するとともに、コンタクトチップの母材に電気ニッケルメッキ被膜を施したことを特徴とするコンタクトチップ。    An insertion hole for inserting a welding wire is formed, the welding wire is guided, and a contact tip for supplying a welding current is formed with a tapered portion having a large diameter toward the distal end at the distal end portion of the insertion hole. In addition, the contact chip is characterized in that an electric nickel plating film is applied to the base material of the contact chip.
JP2018033869A 2018-02-08 2018-02-08 Contact tip Pending JP2019136768A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018033869A JP2019136768A (en) 2018-02-08 2018-02-08 Contact tip

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Application Number Priority Date Filing Date Title
JP2018033869A JP2019136768A (en) 2018-02-08 2018-02-08 Contact tip

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511284U (en) * 1978-07-08 1980-01-24
JPS5671378U (en) * 1979-11-06 1981-06-12
JPS6197380U (en) * 1984-11-30 1986-06-23
JPS61266189A (en) * 1985-05-20 1986-11-25 Toyota Motor Corp Ceramic contact tip for arc welding and its production
JPS62234671A (en) * 1986-04-02 1987-10-14 Toyota Motor Corp Method and device for removing spatter of welding torch
JPS63189478U (en) * 1987-05-27 1988-12-06
JPH04118270U (en) * 1991-04-08 1992-10-22 新日本製鐵株式会社 Welding electrode tip
WO1997012715A1 (en) * 1995-10-03 1997-04-10 Kabushiki Kaisha S M K Contact tip for welding
JP2012218046A (en) * 2011-04-12 2012-11-12 Panasonic Corp Welding contact tip

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5511284U (en) * 1978-07-08 1980-01-24
JPS5671378U (en) * 1979-11-06 1981-06-12
JPS6197380U (en) * 1984-11-30 1986-06-23
JPS61266189A (en) * 1985-05-20 1986-11-25 Toyota Motor Corp Ceramic contact tip for arc welding and its production
JPS62234671A (en) * 1986-04-02 1987-10-14 Toyota Motor Corp Method and device for removing spatter of welding torch
JPS63189478U (en) * 1987-05-27 1988-12-06
JPH04118270U (en) * 1991-04-08 1992-10-22 新日本製鐵株式会社 Welding electrode tip
WO1997012715A1 (en) * 1995-10-03 1997-04-10 Kabushiki Kaisha S M K Contact tip for welding
JP2012218046A (en) * 2011-04-12 2012-11-12 Panasonic Corp Welding contact tip

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