Title:
METHOD FOR MANUFACTURING RESISTANCE SPOT WELDED JOINT
Document Type and Number:
Japanese Patent JP3922263
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To propose a method for manufacturing a spot welded joint having a nugget of a required size without the occurrence of expulsion and surface flash.
SOLUTION: In welding a plate set formed by superposing a plurality of metallic plates on each other, spot welding comprising two stages; a first stage and a second stage, is employed and the welding of the second stage is composed of the welding of a lower current and longer weld time with a higher pressure force as compared with the welding of the first stage, The welding of the first stage in which the pressure force PI, the welding current II and the weld time TI in the relation of the thickness (mm) of the thinnest metal among the plurality of the metallic plates satisfy 0.8tm≤PI≤5tm, 3tm+5≤II, 2≤TI≤6 (where tm: the thickness (mm) of the thinnest metallic plate among the plurality of the metallic plates) and the welding of the second stage in which the pressure force PII, the welding current III and the weld time TII satisfy 1.1PI≤PII≤10PI, 0.51I≤III≤II, TI≤TII≤10TI are preferably employed. As a result, the spot welded joint having the nugget diameter of the required size without the occurrence of of the expulsion and surface flash is obtained.
Inventors:
Yasuaki Okita
Mamoru Ono
Shuichi Sakaguchi
Koichi Yasuda
Mamoru Ono
Shuichi Sakaguchi
Koichi Yasuda
Application Number:
JP2004077118A
Publication Date:
May 30, 2007
Filing Date:
March 17, 2004
Export Citation:
Assignee:
jfe Steel Corporation
International Classes:
B23K11/24; (IPC1-7): B23K11/24
Domestic Patent References:
| JP6226455A | ||||
| JP2003200269A | ||||
| JP2004098107A |
Other References:
中村 孝(外2名),現代溶接技術大系<<第8巻>>,産報出版株式会社,1980年,特装セット版
Attorney, Agent or Firm:
Eiichi Kobayashi