JPH06246459A - Resistance welding method - Google Patents
Resistance welding methodInfo
- Publication number
- JPH06246459A JPH06246459A JP5064848A JP6484893A JPH06246459A JP H06246459 A JPH06246459 A JP H06246459A JP 5064848 A JP5064848 A JP 5064848A JP 6484893 A JP6484893 A JP 6484893A JP H06246459 A JPH06246459 A JP H06246459A
- Authority
- JP
- Japan
- Prior art keywords
- shield cap
- welding
- inert gas
- spot
- electrode
- 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.)
- Withdrawn
Links
Landscapes
- Resistance Welding (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】この発明は、ステンレス鋼板特に
ステンレス鋼板を表皮に持つ複層鋼板の抵抗溶接方法に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resistance welding method for a stainless steel sheet, particularly a multi-layer steel sheet having a stainless steel sheet as a skin.
【0002】[0002]
【従来の技術】ステンレス鋼板は、耐食性が優れている
ことから、自動車用、建材用、家電用等の分野で広く利
用されている。一方、ステンレス鋼板を表皮に持つ複層
鋼板も耐食性に優れ、かつ加工性とコスト面で優れてい
るため、上記分野での展開が期待されている。2. Description of the Related Art Stainless steel sheets are widely used in the fields of automobiles, building materials, home appliances, etc. because of their excellent corrosion resistance. On the other hand, a multi-layered steel sheet having a stainless steel sheet as a skin is also excellent in corrosion resistance, and is excellent in workability and cost, and is expected to be developed in the above fields.
【0003】これらの材料を上記分野で用いられるとき
には、組立段階で抵抗溶接(スポット溶接、シーム溶
接)が多用されるが、溶接後、抵抗溶接部表面に変色部
が発生し、耐食性試験を実施するとこの部分から赤錆、
孔食が発生するという欠点があった。When these materials are used in the above fields, resistance welding (spot welding, seam welding) is often used in the assembly stage, but after welding, a discolored portion is generated on the surface of the resistance welding portion and a corrosion resistance test is conducted. Then red rust from this part,
There is a drawback that pitting corrosion occurs.
【0004】そこで現状では、抵抗溶接部表面に溶接後
塗装処理を施工することで耐食性を確保している。Therefore, at present, corrosion resistance is ensured by applying a coating process after welding on the surface of the resistance welding portion.
【0005】[0005]
【発明が解決しようとする課題】ところが上述の方法で
は、抵抗溶接部表面を全部塗装する必要があり、溶接組
立が終了した後成品表面に塗装処理するならまだしも、
溶接後成品内部にある溶接部表面に塗装処理を施工する
のは不可能である。また、成品組立の途中での塗装処理
は、抵抗溶接組立ラインにあらたに塗装工程を付加する
こととなり、コスト面から事実上不可能である。However, in the above-mentioned method, it is necessary to coat the entire surface of the resistance welding portion.
Post-welding It is impossible to apply paint treatment to the surface of the weld inside the product. Further, the coating process during the product assembly requires a new coating process on the resistance welding assembly line, which is practically impossible in terms of cost.
【0006】本発明は、上記問題点に鑑みなされたもの
で、ステンレス鋼板及びステンレス鋼板を表皮に持つ複
層鋼板の抵抗溶接において、溶接後塗装処理を施工しな
いでも良好な耐食性を確保できる溶接方法を提供する。The present invention has been made in view of the above problems, and in resistance welding of a stainless steel plate and a multi-layered steel plate having a stainless steel plate as a skin, a welding method capable of ensuring good corrosion resistance without applying a coating process after welding. I will provide a.
【0007】[0007]
【課題を解決するための手段および作用】即ち、本発明
者らは、上記問題点を解決するために種々の実験を行っ
た結果、抵抗溶接(スポット溶接、シーム溶接)で、被
溶接部表面に不活性ガスを供給した状態で通電すること
で、抵抗溶接部表面の変色部の発生を抑止することが可
能で、耐食性試験を実施してもこの部分から赤錆及び孔
食の発生を抑止し、母材と同等の耐食性を確保できるこ
とを見い出した。That is, the inventors of the present invention conducted various experiments to solve the above problems, and as a result, resistance welding (spot welding, seam welding), It is possible to suppress the generation of discolored parts on the surface of the resistance welding part by energizing it while supplying an inert gas to the surface, and to prevent the occurrence of red rust and pitting corrosion from this part even if a corrosion resistance test is performed. Found that the same level of corrosion resistance as the base metal can be secured.
【0008】本発明は、以上のような知見に基づいてな
されたものであって、その要旨は、ステンレス鋼板およ
びステンレス鋼板を表皮に持つ複層鋼板の抵抗溶接(ス
ポット溶接、シーム溶接)方法において、溶接部の周囲
にシールドキャップを配置し、該シールドキャップを通
して溶接部表面に不活性ガスを供給した状態で通電する
ことを特徴とする、ステンレス鋼板及びステンレス鋼板
を表皮に持つ複層鋼板の抵抗溶接方法である。以下に本
発明を図に基づいて説明する。The present invention has been made based on the above findings, and its gist is a method for resistance welding (spot welding, seam welding) of a stainless steel plate and a multi-layer steel plate having a stainless steel plate as a skin. A resistance of a stainless steel plate and a multi-layered steel plate having a stainless steel skin as a skin, characterized in that a shield cap is arranged around the welded part, and current is supplied to the surface of the welded part through the shield cap while supplying an inert gas. It is a welding method. The present invention will be described below with reference to the drawings.
【0009】まず、図1に本発明をスポット溶接に適用
した場合の概略構成を示す。スポット電極1aは給電部
である電極ホルダー2aに固定されている。このスポッ
ト電極1aを取り囲むようにシールドキャップ3aが配
置され、このシールドキャップ3aを通して不活性ガス
4が供給されている。一方、スポット電極1bは、給電
部である電極ホルダー2bに固定されている。このスポ
ット電極1bを取り囲むようにシールドキャップ3bが
配置され、このシールドキャップ3bを通して不活性ガ
ス4が供給されている。この場合には、スポット電極と
同心状のシールドキャップを採用しているが、スポット
電極に対し斜め方向から不活性ガスを被溶接物表面に供
給する態様もある。図1の装置構成でスポット電極1
a,1bの間に被溶接物5a,5bを挿入し通電すると
溶接部6が形成される。不活性ガス4が無い場合には、
被溶接物である5a,5bのスポット電極1a,1b側
にはスポット電極1a,1bと同心状の変色部が形成さ
れる。しかし、不活性ガス4で被溶接物5a,5b表面
をおおっている場合には、溶接部6が形成されても変色
部の発生は確認されない。First, FIG. 1 shows a schematic structure when the present invention is applied to spot welding. The spot electrode 1a is fixed to an electrode holder 2a which is a power feeding section. A shield cap 3a is arranged so as to surround the spot electrode 1a, and an inert gas 4 is supplied through the shield cap 3a. On the other hand, the spot electrode 1b is fixed to the electrode holder 2b which is a power feeding portion. A shield cap 3b is arranged so as to surround the spot electrode 1b, and the inert gas 4 is supplied through the shield cap 3b. In this case, a shield cap that is concentric with the spot electrode is used, but there is also a mode in which an inert gas is supplied to the surface of the workpiece from an oblique direction with respect to the spot electrode. Spot electrode 1 in the device configuration of FIG.
When the objects to be welded 5a and 5b are inserted between a and 1b and a current is applied, a welded portion 6 is formed. If there is no inert gas 4,
Discolored portions that are concentric with the spot electrodes 1a and 1b are formed on the spot electrodes 1a and 1b sides of the workpieces 5a and 5b. However, when the surfaces of the objects to be welded 5a and 5b are covered with the inert gas 4, the generation of the discolored portion is not confirmed even if the welded portion 6 is formed.
【0010】図2に本発明をシーム溶接に適用した場合
の概略構成を示す。シーム電極輪7aの出側を狙うよう
にシールドキャップ13aが配置され、このシールドキ
ャップ13aを通して不活性ガス4が供給されている。
一方、シーム電極輪7bの出側を狙うようにシールドキ
ャップ13bが配置され、このシールドキャップ13b
を通して不活性ガス4が供給されている。上記シーム電
極輪7a,7bの間に被溶接物15a,15bを挿入し
通電することで、溶接部16が連続的に形成される。不
活性ガス4が無い場合には、被溶接物である15a,1
5bのシーム電極輪7a、7b側に変色部が形成され
る。しかし、不活性ガス4で被溶接物15a,15b表
面をおおっている場合には、溶接部16が形成されても
変色部の発生は確認されない。FIG. 2 shows a schematic structure when the present invention is applied to seam welding. The shield cap 13a is arranged so as to aim at the exit side of the seam electrode wheel 7a, and the inert gas 4 is supplied through this shield cap 13a.
On the other hand, the shield cap 13b is arranged so as to aim at the exit side of the seam electrode wheel 7b.
Inert gas 4 is supplied through. The welded portions 16 are continuously formed by inserting the objects to be welded 15a, 15b between the seam electrode wheels 7a, 7b and energizing them. When the inert gas 4 is not present, the object to be welded is 15a, 1
A discolored portion is formed on the seam electrode wheels 7a and 7b side of 5b. However, when the surfaces of the objects to be welded 15a and 15b are covered with the inert gas 4, the generation of the discolored portion is not confirmed even if the welded portion 16 is formed.
【0011】[0011]
(1)スポット溶接 供試のステンレス複層鋼板は、板厚0.6mmの軟鋼板
の両面に板厚0.1mmのSUS304を組み合わせた
ものである。この複層鋼板2枚を重ねて以下の溶接条件
でスポット溶接を実施した。(1) Spot Welding The sample stainless steel multi-layer steel plate is a combination of 0.6 mm thick mild steel plates with SUS304 having a thickness of 0.1 mm. Spot welding was performed under the following welding conditions by stacking two sheets of the multilayer steel sheets.
【0012】溶接電極:CF型4.5mmφ、電極加圧
力:200kgf、溶接電流:8kA、通電時間:10
サイクル、シールドガス:アルゴン・・・30l/分。Welding electrode: CF type 4.5 mmφ, electrode pressure: 200 kgf, welding current: 8 kA, energizing time: 10
Cycle, shield gas: Argon ... 30 l / min.
【0013】以上の溶接条件で得られたスポット溶接部
に対し、以下の条件で腐食試験を実施した。Corrosion tests were carried out on the spot welds obtained under the above welding conditions under the following conditions.
【0014】人工海水噴霧4時間、60℃乾燥2時間、
98%水蒸気中湿潤2時間 上記条件で10サイクル腐食試験をしたところ、シール
ドガス無しで得られたサンプルにおいて赤錆、孔食が発
生したが、シールドガズ有りで得られたサンプルでは赤
錆、孔食ともに発生しなかった。Artificial seawater spray for 4 hours, 60 ° C drying for 2 hours,
Moisture in 98% water vapor for 2 hours When a 10-cycle corrosion test was conducted under the above conditions, red rust and pitting corrosion occurred in the sample obtained without shield gas, but both red rust and pitting corrosion occurred in the sample obtained with shield gas. I didn't.
【0015】(2)シーム溶接 供試のステンレス複層鋼板は、板厚0.6mmの軟鋼板
の両面に板厚0.1mmのSUS430を組み合わせた
ものである。この複層鋼板2枚を重ねて以下の溶接条件
でシーム溶接を実施した。(2) Seam Welding The stainless steel multi-layer steel sheet tested is a combination of a mild steel sheet having a thickness of 0.6 mm and SUS430 having a thickness of 0.1 mm. Seam welding was performed under the following welding conditions by stacking two sheets of the multilayer steel sheets.
【0016】溶接電極輪:台形先端幅4.5mm、電極
加圧力:400kgf、溶接電流:14kA、通電時
間:3サイクルON−2サイクルOFF、シールドガ
ス:アルゴン・・・50l/分。Welding electrode wheel: trapezoidal tip width of 4.5 mm, electrode pressing force: 400 kgf, welding current: 14 kA, energizing time: 3 cycles ON-2 cycles OFF, shielding gas: argon ... 50 l / min.
【0017】以上の溶接条件で得られたシーム溶接部に
対し、以下の条件で腐食試験を実施した。The seam welds obtained under the above welding conditions were subjected to a corrosion test under the following conditions.
【0018】人工海水噴霧4時間、60℃乾燥2時間、
98%水蒸気中湿潤2時間 上記条件で10サイクル腐食試験をしたところ、シール
ドガス無しで得られたサンプルにおいて赤錆、孔食が発
生したが、シールドガズ有りで得られたサンプルでは赤
錆、孔食ともに発生しなかった。Artificial seawater spraying for 4 hours, drying at 60 ° C. for 2 hours,
Moisture in 98% water vapor for 2 hours When a 10-cycle corrosion test was conducted under the above conditions, red rust and pitting corrosion occurred in the sample obtained without shield gas, but both red rust and pitting corrosion occurred in the sample obtained with shield gas. I didn't.
【0019】[0019]
【発明の効果】以上説明したごとく、本発明は、ステン
レス鋼板及びステンレス鋼板を表皮に持つ複層鋼板の抵
抗溶接(スポット溶接、シーズ溶接)方法において、溶
接部の周囲にシールドキャップを配置し、該シールドキ
ャップを通して被溶接部表面に不活性ガスを供給した状
態で通電することにより、耐食性の優れた溶接部を得る
ことを可能にしたものであり、自動車用、建材用、家電
用などに広く利用することができる。As described above, according to the present invention, in a resistance welding (spot welding, sheath welding) method for a stainless steel plate and a multi-layer steel plate having a stainless steel plate as a skin, a shield cap is arranged around the welded portion, It is possible to obtain a weld with excellent corrosion resistance by energizing the surface to be welded with an inert gas supplied through the shield cap, and it is widely used for automobiles, building materials, home appliances, etc. Can be used.
【図1】本発明をスポット溶接に適用した一実施例の模
式図である。FIG. 1 is a schematic view of an embodiment in which the present invention is applied to spot welding.
【図2】本発明をシーム溶接に適用した一実施例の模式
図である。FIG. 2 is a schematic view of an example in which the present invention is applied to seam welding.
1a,1b スポット電極 2a,2b 電極ホルダー 3a,3b,13a,13b シールドキャップ 4 シールドガス 5a,5b,15a,15b 被溶接物 6,16 溶接部 7a,7b シーム電極輪 1a, 1b Spot electrode 2a, 2b Electrode holder 3a, 3b, 13a, 13b Shield cap 4 Shield gas 5a, 5b, 15a, 15b Work piece 6, 16 Welded part 7a, 7b Seam electrode wheel
Claims (2)
を配置し、該シールドキャップを通して被溶接物表面に
不活性ガスを供給した状態で、通電することを特徴とす
るスポット溶接方法。1. A spot welding method, which comprises arranging a shield cap around a spot electrode, and energizing the shield electrode in a state where an inert gas is supplied to the surface of an object to be welded through the shield cap.
を配置し、該シールドキャップを通して被溶接部表面に
不活性ガスを供給した状態で、通電することを特徴とす
るシーム溶接方法。2. A seam welding method characterized in that a shield cap is arranged around a seam electrode wheel, and current is supplied in a state where an inert gas is supplied to the surface of a welded part through the shield cap.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5064848A JPH06246459A (en) | 1993-03-02 | 1993-03-02 | Resistance welding method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5064848A JPH06246459A (en) | 1993-03-02 | 1993-03-02 | Resistance welding method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH06246459A true JPH06246459A (en) | 1994-09-06 |
Family
ID=13270042
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5064848A Withdrawn JPH06246459A (en) | 1993-03-02 | 1993-03-02 | Resistance welding method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH06246459A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1820596A1 (en) * | 2006-02-21 | 2007-08-22 | Siemens Transportation Systems GmbH & Co KG | Device for spot welding |
JP2009045657A (en) * | 2007-08-21 | 2009-03-05 | Sekisui Chem Co Ltd | Spot resistance welding machine |
JP2009107000A (en) * | 2007-10-31 | 2009-05-21 | Sekisui Chem Co Ltd | Spot resistance welding machine |
-
1993
- 1993-03-02 JP JP5064848A patent/JPH06246459A/en not_active Withdrawn
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1820596A1 (en) * | 2006-02-21 | 2007-08-22 | Siemens Transportation Systems GmbH & Co KG | Device for spot welding |
JP2009045657A (en) * | 2007-08-21 | 2009-03-05 | Sekisui Chem Co Ltd | Spot resistance welding machine |
JP2009107000A (en) * | 2007-10-31 | 2009-05-21 | Sekisui Chem Co Ltd | Spot resistance welding machine |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000509 |