Title:
METHOD FOR WELDING COATED STEEL PLATE
Document Type and Number:
WIPO Patent Application WO/2011/145506
Kind Code:
A1
Abstract:
Provided is a method for welding coated steel plates in which a metal portion of a metal plate having one surface coated with an insulating film is punched from the other surface having no insulating film with a punch having a flat end and a die paired therewith, whereby the lower end of the metal portion on the inner surface of the punched hole is exposed at the surface coated with the insulating film. The exposed portion is then brought into contact with another metal plate, allowing an electric current to pass therethrough for jointing by resistance welding.
Inventors:
YOSHIDA, Takeyuki (Nisshin Steel Co. Ltd., 5, Ishizunishi-machi, Nishi-ku, Sakai-sh, Osaka 32, 〒5928332, JP)
吉田 剛之 (〒32 大阪府堺市西区石津西町５番地 日新製鋼株式会社 技術研究所内 Osaka, 〒5928332, JP)
吉田 剛之 (〒32 大阪府堺市西区石津西町５番地 日新製鋼株式会社 技術研究所内 Osaka, 〒5928332, JP)
Application Number:
JP2011/060912
Publication Date:
November 24, 2011
Filing Date:
May 12, 2011
Export Citation:
Assignee:
NISSHIN STEEL CO., LTD. (4-1 Marunouchi 3-chome, Chiyoda-ku Tokyo, 66, 〒1008366, JP)
日新製鋼株式会社 (〒66 東京都千代田区丸の内三丁目４番１号 Tokyo, 〒1008366, JP)
YOSHIDA, Takeyuki (Nisshin Steel Co. Ltd., 5, Ishizunishi-machi, Nishi-ku, Sakai-sh, Osaka 32, 〒5928332, JP)
日新製鋼株式会社 (〒66 東京都千代田区丸の内三丁目４番１号 Tokyo, 〒1008366, JP)
YOSHIDA, Takeyuki (Nisshin Steel Co. Ltd., 5, Ishizunishi-machi, Nishi-ku, Sakai-sh, Osaka 32, 〒5928332, JP)
International Classes:
B23K11/16; B21D28/24; B23K11/14
Attorney, Agent or Firm:
SOGA, Michiharu et al. (S. Soga & Co, 8th Floor Kokusai Building, 1-1, Marunouchi 3-chome, Chiyoda-k, Tokyo 05, 〒1000005, JP)
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Claims: