JPH042347B2 - - Google Patents
Info
- Publication number
- JPH042347B2 JPH042347B2 JP62129558A JP12955887A JPH042347B2 JP H042347 B2 JPH042347 B2 JP H042347B2 JP 62129558 A JP62129558 A JP 62129558A JP 12955887 A JP12955887 A JP 12955887A JP H042347 B2 JPH042347 B2 JP H042347B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- laser
- energy density
- plate surface
- less
- 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 - Lifetime
Links
- 238000003466 welding Methods 0.000 claims description 23
- 238000000034 method Methods 0.000 claims description 9
- 239000007769 metal material Substances 0.000 claims description 5
- 238000004021 metal welding Methods 0.000 claims description 2
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical group [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 2
- 229910052721 tungsten Inorganic materials 0.000 claims description 2
- 239000010937 tungsten Substances 0.000 claims description 2
- 239000011324 bead Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910000601 superalloy Inorganic materials 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910001069 Ti alloy Inorganic materials 0.000 description 2
- 230000002301 combined effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910001256 stainless steel alloy Inorganic materials 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Landscapes
- Arc Welding In General (AREA)
- Laser Beam Processing (AREA)
Description
（産業上の利用分野）
本発明はステンレス鋼、チタン、超合金など金
属材料の薄板の溶接に用いるTIG溶接法に関す
る。
（従来の技術）
TIG溶接法は上述の材料の溶接に有用な方法で
あり、広く使用されている。しかしながら、板厚
1.0mm以下の薄板の溶接を高速で行うことは困難
である。そこで高速化のため、特公昭52−37732
号公報に記載のように多電極にすることなどが知
られている。また、特公昭62−6906号公報に記載
のようにレーザーで予熱を行う方法が提案されて
いる。
（発明が解決しようとする問題点）
たしかに、上述の多電極TIG技術により溶接速
度を高めることはできるが、溶接ビート巾が広
く、かつアークの磁気干渉によりビードが不安定
となるという難点がある。レーザー予熱溶接は確
かに溶接速度を高めることができるが、特公昭62
−6906号公報記載の技術はレーザー照射を単なる
予熱に用いているのみであり、溶接ビート巾が広
くなるという欠点がある。
本発明は溶接速度を飛躍的に高め、内外のビー
ド形状が巾狭くかつ平滑な溶接方法を提供するこ
とを目的とするものである。
（問題点を解決するための手段）
本発明は、板厚1.0mm以下の金属材料のTIG溶
接にあたり、タングステン電極の狙い位置に先行
し、距離10mm以下離れた位置で、(1)式で計算され
る板表面におけるエネルギー密度Ｅが104J／cm2以
上のレーザー照射を行うことを特徴とするTIG溶
接方法である。
Ｅ＝Ｐ／DV ……(1)
ここに
Ｅ：板表面におけるエネルギー密度（Ｊ／cm2）、
Ｐ：レーザー出力（Watt）、
Ｄ：板表面におけるレーザービーム直径（cm）、
Ｖ：ビーム照射移動速度（cm／ｓ）
である。
（作用）
金属に高エネルギー密度のレーザー照射を行う
と、プラズマが発生し、このプラズマにはアーク
を吸引する作用がある。この作用により、レーザ
ー照射に追随してTIG溶接を行うと、レーザー照
射部にアークが集中し、レーザーによる予熱効果
と複合した効果により、高速でかつ内外ビードの
巾が狭く、ビード形状が平滑な溶接を行うことが
できる。
したがつて、TIG電極狙い位置とレーザー照射
位置とが10mm以内に接近していることが必要であ
り、10mmを越えるとプラズマのアークの吸引効果
がなくなる。
レーザー照射の条件としてプラズマが発生する
ことが必要である。研究の結果、金属材料、たと
えばステンレス鋼、チタン、超合金においては、
板表面におけるレーザーのエネルギー密度が
104J／cm2以上必要であることを見いだした。エネ
ルギー密度の上限は、レーザー照射により板が溶
け落ちしない条件とすべきであるが、これは材料
およびビーム直径、焦点位置などの要因が複雑に
絡み、一義的には定まらない。
板厚を１mm以下に限定したのは、１mmを越える
と溶接が溶け込み現象に支配され、プラズマなら
びにアークの複合効果がそれほど顕著でなくなる
からである。
（実施例）
表１に示すが、本発明の実施例は番号に「＊」
を付している。TIG溶接は通常薄板溶接に用いら
れている高周波パルスTIG溶接機を使用した。
表１より、本発明による溶接法によれば、高速
でかつ内外ビードの平滑な溶接が行えることがわ
かる。
(Industrial Application Field) The present invention relates to a TIG welding method used for welding thin plates of metal materials such as stainless steel, titanium, and superalloys. (Prior Art) TIG welding is a method useful for welding the above-mentioned materials and is widely used. However, the plate thickness
It is difficult to weld thin plates of 1.0 mm or less at high speed. Therefore, in order to speed up the
It is known to use multiple electrodes as described in the above publication. Further, a method of preheating using a laser has been proposed as described in Japanese Patent Publication No. 62-6906. (Problems to be Solved by the Invention) It is true that the welding speed can be increased by the multi-electrode TIG technology described above, but there are disadvantages in that the welding bead width is wide and the bead becomes unstable due to magnetic interference of the arc. . Laser preheat welding can certainly increase welding speed, but
The technique described in the -6906 publication uses laser irradiation only for preheating, and has the disadvantage that the welding bead width becomes wider. The object of the present invention is to provide a welding method that dramatically increases the welding speed and allows the inner and outer bead shapes to be narrow and smooth. (Means for Solving the Problem) The present invention performs TIG welding of metal materials with a plate thickness of 1.0 mm or less, and performs calculation using equation (1) at a position preceding the target position of the tungsten electrode and at a distance of 10 mm or less. This is a TIG welding method characterized by performing laser irradiation with an energy density E of 10 4 J/cm 2 or more on the surface of the plate to be welded. E=P/DV...(1) Here, E: Energy density on the plate surface (J/cm 2 ), P: Laser output (Watt), D: Laser beam diameter on the plate surface (cm), V: Beam irradiation The moving speed (cm/s). (Function) When a metal is irradiated with a high energy density laser, plasma is generated, and this plasma has the effect of attracting the arc. Due to this effect, when TIG welding is performed following laser irradiation, the arc concentrates on the laser irradiated area, and due to the combined effect with the preheating effect of the laser, welding can be performed at high speed, with narrow inner and outer bead widths, and a smooth bead shape. Can perform welding. Therefore, it is necessary that the TIG electrode target position and the laser irradiation position be close to each other within 10 mm; if the distance exceeds 10 mm, the plasma arc suction effect will be lost. It is necessary for plasma to be generated as a condition for laser irradiation. As a result of research, in metal materials such as stainless steel, titanium, and superalloys,
The energy density of the laser on the plate surface is
It was found that 10 4 J/cm 2 or more is required. The upper limit of the energy density should be such that the plate does not burn through due to laser irradiation, but this cannot be determined unambiguously because factors such as the material, beam diameter, and focal position are intricately involved. The reason why the plate thickness is limited to 1 mm or less is because if it exceeds 1 mm, welding will be dominated by the penetration phenomenon, and the combined effect of plasma and arc will not be so pronounced. (Example) As shown in Table 1, examples of the present invention are indicated by "*" in the number.
is attached. For TIG welding, a high-frequency pulse TIG welding machine, which is normally used for thin plate welding, was used. From Table 1, it can be seen that according to the welding method according to the present invention, smooth welding of the inner and outer beads can be performed at high speed.
【表】【table】
【表】
＊：実施例
（発明の効果）
本発明は今後ますます需要の増加が予想される
金属材料、たとえばステンレス鋼、チタンならび
に超合金の薄板の高品質、高速の溶接方法を提供
するものであり、工業的価値は絶大である。[Table] *: Examples (effects of the invention) The present invention provides a high-quality, high-speed welding method for metal materials whose demand is expected to increase in the future, such as stainless steel, titanium, and thin sheets of superalloys. Therefore, its industrial value is enormous.
Claims (1)
り、タングステン電極の狙い位置に先行し、距離
10mm以下離れた位置で、(1)式で計算される板表面
におけるエネルギー密度Ｅが104J／cm2以上のレー
ザー照射を行うことを特徴とするTIG溶接方法。 Ｅ＝Ｐ／DV ……(1) ここに Ｅ：板表面におけるエネルギー密度（Ｊ／cm2）、 Ｐ：レーザー出力（Watt）、 Ｄ：板表面におけるレーザービーム直径（cm）、 Ｖ：ビーム照射移動速度（cm／ｓ） である。[Claims] 1. In TIG welding of metal materials with a plate thickness of 1.0 mm or less, the target position of the tungsten electrode is preceded and the distance
A TIG welding method characterized by performing laser irradiation with an energy density E of 10 4 J/cm 2 or more on the plate surface calculated by equation (1) at a distance of 10 mm or less. E=P/DV...(1) Here, E: Energy density on the plate surface (J/cm 2 ), P: Laser output (Watt), D: Laser beam diameter on the plate surface (cm), V: Beam irradiation The moving speed (cm/s).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129558A JPS63295066A (en) | 1987-05-26 | 1987-05-26 | High-speed tig welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129558A JPS63295066A (en) | 1987-05-26 | 1987-05-26 | High-speed tig welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63295066A JPS63295066A (en) | 1988-12-01 |
| JPH042347B2 true JPH042347B2 (en) | 1992-01-17 |
Family
ID=15012465
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62129558A Granted JPS63295066A (en) | 1987-05-26 | 1987-05-26 | High-speed tig welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63295066A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5343015A (en) * | 1992-11-06 | 1994-08-30 | Fintube Limited Partnership | Laser assisted high frequency welding |
| JP2913018B2 (en) * | 1996-04-30 | 1999-06-28 | 工業技術院長 | Metal surface treatment method |
| JP2000210782A (en) * | 1998-02-19 | 2000-08-02 | Ricoh Microelectronics Co Ltd | Machining method and its device |
-
1987
- 1987-05-26 JP JP62129558A patent/JPS63295066A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63295066A (en) | 1988-12-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |