JPH0321822Y2 - - Google Patents
Info
- Publication number
- JPH0321822Y2 JPH0321822Y2 JP14228685U JP14228685U JPH0321822Y2 JP H0321822 Y2 JPH0321822 Y2 JP H0321822Y2 JP 14228685 U JP14228685 U JP 14228685U JP 14228685 U JP14228685 U JP 14228685U JP H0321822 Y2 JPH0321822 Y2 JP H0321822Y2
- Authority
- JP
- Japan
- Prior art keywords
- cylindrical member
- torch
- internal conductor
- spatter
- welding machine
- 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.)
- Expired
Links
- 239000004020 conductor Substances 0.000 claims description 25
- 229910010293 ceramic material Inorganic materials 0.000 claims description 14
- 238000003466 welding Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 11
- 229910052751 metal Inorganic materials 0.000 claims description 11
- 239000011247 coating layer Substances 0.000 claims description 10
- 230000003746 surface roughness Effects 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 230000005611 electricity Effects 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 description 12
- 230000002093 peripheral effect Effects 0.000 description 10
- 238000010292 electrical insulation Methods 0.000 description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052709 silver Inorganic materials 0.000 description 3
- 239000004332 silver Substances 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 239000010931 gold Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000005524 ceramic coating Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000007750 plasma spraying Methods 0.000 description 1
- 239000006223 plastic coating Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 230000009257 reactivity Effects 0.000 description 1
- 230000009291 secondary effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006557 surface reaction Methods 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、シールドガスを分流し且つトーチノ
ズルを固定する円筒状部材を設けた耐久性にすぐ
れたアーク溶接機用トーチに関する。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a highly durable torch for arc welding machines that is provided with a cylindrical member that divides shielding gas and fixes the torch nozzle.
従来、アーク溶接機用トーチの構成部品とし
て、シールドガスを分流し且つトーチノズルを固
定する円筒状部材が使用されている。この円筒状
部材は、耐熱疲労性およびスパツタとの耐反応
性、さらに電気絶縁性が要求されているが、従来
の円筒状部材は、エンジニアリングプラスチツク
製であり、円筒状部材近傍の温度が250〜350℃と
なるので、プラスチツク製では耐熱限界に近く耐
久性がなかつた。
Conventionally, as a component of a torch for an arc welding machine, a cylindrical member that divides shielding gas and fixes a torch nozzle has been used. This cylindrical member is required to have thermal fatigue resistance, reaction resistance with spatter, and electrical insulation, but conventional cylindrical members are made of engineering plastic, and the temperature near the cylindrical member is 250 to 250°C. Since the temperature was 350℃, plastic was close to its heat resistance limit and was not durable.
そこで最近では、プラスチツク製からセラミツ
ク製の円筒状部材に置き換えられている。ところ
で円筒状部材の内周面は、金、銀、銅などの非常
に軟質の内部導電体に取り付けられており、円筒
状部材の内周面と内部導電体との隙間に微細なス
パツタ粒が侵入すると、円筒状部材を内部導電体
から取り外すとき、スパツタ粒により内部導電体
が損傷するという問題があつた。 Therefore, recently, plastic cylindrical members have been replaced with ceramic cylindrical members. By the way, the inner peripheral surface of the cylindrical member is attached to a very soft internal conductor made of gold, silver, copper, etc., and fine spatter particles may form in the gap between the inner peripheral surface of the cylindrical member and the internal conductor. Once infiltrated, there was a problem in that the spatter particles damaged the internal conductor when the cylindrical member was removed from the internal conductor.
本考案は、前述のとおり、従来のアーク溶接機
用トーチにおいて、前記円筒状部材で問題となつ
ていた耐熱疲労性、スパツタとの耐反応性および
電気絶縁性の問題を解決し、円筒状部材として使
用されるに十分な耐熱疲労性、スパツタとの耐反
応性および電気絶縁性を有し、かつ円筒状部材を
内部導電体から取り外すとき、スパツタにより内
部導電体が損傷しないようにしたアーク溶接機用
トーチを提供することを目的としている。
As mentioned above, the present invention solves the problems of thermal fatigue resistance, reaction resistance with spatter, and electrical insulation that were problems with the cylindrical member in conventional arc welding torches. Arc welding that has sufficient thermal fatigue resistance, resistance to reaction with spatter, and electrical insulation to be used as an internal conductor, and prevents the internal conductor from being damaged by spatter when removing the cylindrical member from the internal conductor. The purpose is to provide aircraft torches.
本考案者等は、前述の問題を解決するための具
体的手段を鋭意研究した結果、以下の手段により
耐熱疲労性、スパツタとの耐反応性および電気絶
縁性が優れ、且つスパツタによる内部導電体の損
傷をなくす円筒上部材が得られることを知見して
本考案を完成した。すなわち、本考案は、軟質金
属よりなる内部導電体に内周面を取り付けられ且
つシールドガスを分流しトーチノズルを固定する
ための円筒状部材をセラミツク材で形成し、該円
筒状部材の内周面に前記内部導電体より軟質の金
属又は樹脂のコーテイングを施こした内部皮膜層
を設けたものである。
As a result of intensive research into specific means to solve the above-mentioned problems, the inventors of the present invention have found that the following means have achieved excellent thermal fatigue resistance, resistance to reaction with spatter, and electrical insulation, as well as an internal conductor formed by spatter. The present invention was completed after discovering that a cylindrical member that eliminates damage to the cylindrical member can be obtained. That is, in the present invention, a cylindrical member whose inner peripheral surface is attached to an internal conductor made of a soft metal and for distributing shielding gas and fixing a torch nozzle is formed of a ceramic material, and the inner peripheral surface of the cylindrical member is attached to an internal conductor made of a soft metal. An internal film layer is provided on the internal conductor, which is coated with a metal or resin that is softer than the internal conductor.
本考案のアーク溶接機用トーチは、円筒状部材
が耐熱疲労性、スパツタとの耐反応性および電気
絶縁性の優れたセラミツク材で形成されており、
また円筒状部材の内周面に軟質の金属または樹脂
の内部皮膜層を形成したから、この内周面にスパ
ツタが付着しにくく、円筒状部材を内部導電体か
ら取り外す際のスパツタによる内部導電体表面の
損傷を防止できる。内部導電体の表面が傷付かず
粗くならないから、スパツタが付着しにくくな
る。
In the torch for arc welding machines of the present invention, the cylindrical member is made of a ceramic material that has excellent thermal fatigue resistance, reaction resistance with spatter, and electrical insulation.
In addition, since an internal coating layer of soft metal or resin is formed on the inner circumferential surface of the cylindrical member, spatter is less likely to adhere to the inner circumferential surface. Prevents surface damage. Since the surface of the internal conductor is not damaged or roughened, spatter is less likely to adhere to it.
以下本考案の実施例について図面を参照して詳
細に説明する。
Embodiments of the present invention will be described in detail below with reference to the drawings.
第１図はアーク溶接機用トーチの構造の一部を
示した縦断面図である。 FIG. 1 is a longitudinal sectional view showing a part of the structure of a torch for an arc welding machine.
円筒状部材１は、セラミツク材で円筒状に形成
されており、その内周面に形成されたねじ部１ａ
は、金、銀、銅などの軟質金属で円筒上に形成さ
れた内部導電体２に螺着されている。円筒状部材
１の右端には、フランジ部１ｂが形成されてお
り、該フランジ部１ｂによりトーチノズル３の右
端面を押圧し、該トーチノズル３を固定するよう
になつている。 The cylindrical member 1 is made of ceramic material and has a cylindrical shape, and has a threaded portion 1a formed on its inner peripheral surface.
is screwed onto an internal conductor 2 formed into a cylindrical shape from a soft metal such as gold, silver, or copper. A flange portion 1b is formed at the right end of the cylindrical member 1, and the flange portion 1b presses the right end surface of the torch nozzle 3 to fix the torch nozzle 3.
円筒状部材１の外周面には、内周面中央部に形
成された環状溝１ｄに連通するシールドガス分流
穴１ｅが形成されており、該シールドガス分流穴
１ｅは、環状溝１ｄを介して内部導電体２の外周
面に形成された貫通穴２ａに連通している。 A shield gas distribution hole 1e is formed in the outer peripheral surface of the cylindrical member 1 and communicates with an annular groove 1d formed in the center of the inner peripheral surface. It communicates with a through hole 2a formed in the outer peripheral surface of the internal conductor 2.
なお第１図において、トーチノズル３はアダプ
タ固定ねじ５を介して円筒状部材１に固定され、
内部導電体２は消耗電極１０に通電すると共にこ
れを支持している。 In FIG. 1, the torch nozzle 3 is fixed to the cylindrical member 1 via an adapter fixing screw 5,
The internal conductor 2 carries current to the consumable electrode 10 and supports it.
ところで、円筒状部材１を形成するセラミツク
材の主要特性として、スパツタ成分中の反応性の
強いSi，Tiとの耐反応性および耐熱疲労性を考
えた場合、酸化物系であるAl2O3系、ZrO2系、非
酸化物系であるSi3N4系、SiC系などのセラミツ
ク材で部品をそれぞれ製作して耐反応性、耐熱疲
労性および電気絶縁性を試験した結果、
Al2O3系およびZrO2系では、Si，Tiと反応をおこ
し耐反応性が不十分であり、また耐熱疲労性は、
第２図に示すように、ビツカース硬度（強度）お
よび熱伝導度が小さく、熱膨張係数が大きく不十
分であつた。 By the way, when considering the main properties of the ceramic material forming the cylindrical member 1, such as resistance to reaction with Si and Ti, which are highly reactive in sputter components, and resistance to thermal fatigue, Al 2 O 3 which is an oxide type As a result of testing the reaction resistance, thermal fatigue resistance, and electrical insulation properties of parts manufactured using ceramic materials such as ZrO 2 -based, ZrO 2 -based, non-oxide Si 3 N 4 -based, and SiC -based ceramic materials, we found that Al 2 O 3 series and ZrO 2 series react with Si and Ti, resulting in insufficient reaction resistance and thermal fatigue resistance.
As shown in FIG. 2, the Vickers hardness (strength) and thermal conductivity were low, and the coefficient of thermal expansion was large and insufficient.
一方、Si3N4系およびSiC系では、Si，Tiと間
に反応をおこすことなく耐反応性は十分であり、
また耐熱疲労性は、第２図に示すように、ビツカ
ース硬度（強度）および熱伝導度が大きく、熱膨
張係数が小さく十分であつた。ただし、SiC系に
ついては電気絶縁性に若干問題があり、その結
果、円筒状部材１のセラミツク材としては、通常
のセラミツク材でも所定の効果は得られるもの
の、Si3N4系の材料が最適であることが判明し
た。 On the other hand, Si 3 N 4 type and SiC type have sufficient reaction resistance without causing any reaction with Si and Ti.
As for the thermal fatigue resistance, as shown in FIG. 2, the Vickers hardness (strength) and thermal conductivity were large, and the coefficient of thermal expansion was small and sufficient. However, SiC-based materials have some problems with electrical insulation, and as a result, Si 3 N 4- based materials are optimal as the ceramic material for the cylindrical member 1, although the desired effect can be achieved with regular ceramic materials. It turned out to be.
以上の試験結果から、円筒状部材１をSi3N4系
のセラミツク材で形成すると、耐熱疲労性、スパ
ツタとの耐反応性および電気絶縁性の優れた円筒
状部材１が得られ、脱着時にセラミツク材が割れ
ない限り半永久的に使用することができる。 From the above test results, when the cylindrical member 1 is made of Si 3 N 4 ceramic material, it is possible to obtain a cylindrical member 1 with excellent thermal fatigue resistance, reaction resistance with spatter, and electrical insulation. As long as the ceramic material does not crack, it can be used semi-permanently.
円筒状部材１の内周面の左半部には、内部導電
体２を形成する軟質金属よりさらに軟質の軟質金
属又は樹脂のコーテイングを施こした内部皮膜層
８が設けられている。 The left half of the inner peripheral surface of the cylindrical member 1 is provided with an inner coating layer 8 coated with a soft metal or resin that is softer than the soft metal forming the inner conductor 2 .
この内部皮膜層８を形成する方法として、プラ
ズマ溶射によるセラミツク皮膜、溶射による金属
皮膜、さらに塗布熟成によるプラスチツク皮膜の
４通りを試験した結果、ソフトBNおよび銀、
銅、錫等の軟質金属、さらにテフロン、ポリイミ
ド等の樹脂の皮膜（0.2〜1.0mm）を設けてやれば
よいことが判明した。 As a result of testing four methods for forming this internal coating layer 8, including a ceramic coating by plasma spraying, a metal coating by thermal spraying, and a plastic coating by coating aging, we found that soft BN, silver,
It has been found that it is sufficient to provide a film (0.2 to 1.0 mm) of a soft metal such as copper or tin, or a resin such as Teflon or polyimide.
また、円筒状部材１のセラミツク材とスパツタ
との対反応性は、円筒状部材１の内周面の面粗度
が大きなウエイトを占めているもので、円筒状部
材１の内部皮膜層８の面粗度ＡをＡ＞10μ、Ａ＝
５〜10μ、Ａ＜3μの３通りに分けてスパツタの付
着量を検討した結果、肉眼的にも面粗度の低下に
伴つてスパツタ付着量が減少することが判明した
（第３図参照）。しかし、この面粗度Ａは工業的に
安価にできる限界があり、Ａ＝２〜3μを境とし
て、それ以下にしようとすると非常に高価とな
り、部品単価のことを考慮すると、Ａ＝２〜3μ
（10μ≧Ａ）が実施可能な分岐点である。このよ
うに面粗度の小さい内部皮膜層８にはスパツタが
付着しにくいので、円筒状部材１を取り外す際の
内部導電体２の表面の損傷を防ぐことができる。 In addition, the reactivity between the ceramic material of the cylindrical member 1 and spatter is largely determined by the surface roughness of the inner circumferential surface of the cylindrical member 1; Surface roughness A>10μ, A=
As a result of examining the amount of spatter adhesion in three ways: 5 to 10μ and A<3μ, it was found that the amount of spatter adhesion decreases with the decrease in surface roughness, even when seen with the naked eye (see Figure 3). . However, there is a limit to how this surface roughness A can be made industrially inexpensive, and if you try to make it lower than A = 2~3μ, it will become very expensive, and considering the unit price of the parts, A = 2~3μ. 3μ
(10μ≧A) is an executable branch point. Since spatter is less likely to adhere to the inner coating layer 8 having such a small surface roughness, damage to the surface of the inner conductor 2 can be prevented when the cylindrical member 1 is removed.
本考案のアーク溶接機用トーチは、円筒状部材
が耐熱疲労性、耐反応性および電気絶縁性に優れ
たセラミツク材で形成されているので、耐久性が
大幅に向上する。また、円筒状部材の内周面に内
部導電体よりさらに軟質の軟質金属又は樹脂より
なる内部皮膜層が形成されスパツタが付着しにく
くしたので、
円筒状部材を内部導電体より取り外すときスパ
ツタによる内部導電体の損傷を防止することがで
きる。また２次的効果として、円筒状部材の内部
皮膜層の面粗度を10μ以下２〜3μとすることによ
り、スパツタの物理的化学的付着を少なくするこ
とができ、もし付着しても表面反応がおきないた
め付着したスパツタを容易に取り去ることができ
る。
Since the cylindrical member of the torch for an arc welding machine of the present invention is made of a ceramic material that has excellent thermal fatigue resistance, reaction resistance, and electrical insulation, durability is greatly improved. In addition, an internal coating layer made of a soft metal or resin that is softer than the internal conductor is formed on the inner peripheral surface of the cylindrical member to prevent spatter from adhering to the inner surface of the cylindrical member. Damage to the conductor can be prevented. In addition, as a secondary effect, by setting the surface roughness of the internal coating layer of the cylindrical member to 10μ or less or 2 to 3μ, it is possible to reduce the physical and chemical adhesion of spatter, and even if it adheres, it will cause a surface reaction. Since it does not cause any build-up, adhering spatter can be easily removed.
第１図はアーク溶接機用トーチの構造の一部を
示した縦断面図、第２図はセラミツクの諸特性を
示す線図、第３図は内部皮膜層の面粗度とスパツ
タ付着量との関係を示す線図である。
１……円筒状部材、２……内部導電体、３……
トーチノズル、８……内部皮膜層。
Figure 1 is a vertical cross-sectional view showing part of the structure of a torch for an arc welding machine, Figure 2 is a diagram showing various characteristics of ceramic, and Figure 3 is a graph showing the surface roughness of the internal coating layer and the amount of spatter attached. FIG. 1... Cylindrical member, 2... Internal conductor, 3...
Torch nozzle, 8...Inner coating layer.
Claims (1)
内部導電体の外周側に嵌脱可能に装着され、該
内部導電体より大径の円筒形で、内面から外面
へ半径方向にシールドガスを分流する複数の孔
を有し、該シールドガスを導くトーチノズルを
外周側に嵌脱可能に装着する円筒状部材を備え
たアーク溶接機用トーチにおいて、前記円筒状
部材がセラミツク材料で形成され、かつ前記円
筒状部材の前記内部導電体との装着部分以外の
内周面に前記内部導電体より軟質の金属または
樹脂の内部皮膜層が設けられたことを特徴とす
るアーク溶接機用トーチ。 ２ 前記セラミツク材は、Si3N4系であることを
特徴とする実用新案登録請求の範囲第１項記載
のアーク溶接機用トーチ。 ３ 前記内部皮膜層の面粗度を10μ以下にしたこ
とを特徴とする実用新案登録請求の範囲第１ま
たは第２項記載のアーク溶接機用トーチ。[Claims for Utility Model Registration] 1. A device that is removably attached to the outer circumferential side of a cylindrical internal conductor that supports a consumable electrode and conducts electricity, and that has a cylindrical shape with a larger diameter than the internal conductor and that extends from the inner surface to the outer surface. A torch for an arc welding machine comprising a cylindrical member having a plurality of holes for dividing shielding gas in a radial direction, and a torch nozzle for guiding the shielding gas is removably fitted on the outer circumferential side, wherein the cylindrical member is An arc characterized in that the arc is made of a ceramic material and has an internal coating layer of a metal or resin that is softer than the internal conductor on the inner circumferential surface of the cylindrical member other than the part where the internal conductor is attached. Torch for welding machine. 2. The torch for an arc welding machine according to claim 1, wherein the ceramic material is Si 3 N 4 based. 3. The torch for an arc welding machine according to claim 1 or 2, wherein the inner coating layer has a surface roughness of 10 μm or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14228685U JPH0321822Y2 (en) | 1985-09-18 | 1985-09-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14228685U JPH0321822Y2 (en) | 1985-09-18 | 1985-09-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6250878U JPS6250878U (en) | 1987-03-30 |
| JPH0321822Y2 true JPH0321822Y2 (en) | 1991-05-13 |
Family
ID=31050870
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14228685U Expired JPH0321822Y2 (en) | 1985-09-18 | 1985-09-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0321822Y2 (en) |
-
1985
- 1985-09-18 JP JP14228685U patent/JPH0321822Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6250878U (en) | 1987-03-30 |
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