The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 08, 2016
Filed:
Sep. 24, 2010
Shinichi Kaga, Hitachi, JP;
Mitsuru Onose, Tokyo, JP;
Noriaki Tominaga, Hiroshima, JP;
Takehiko Saito, Hiroshima, JP;
Yasutsugu Yoshimura, Kawasaki, JP;
Hirotomo Tagata, Hiroshima, JP;
Keiichi Sato, Hiroshima, JP;
Shinichi Kaga, Hitachi, JP;
Mitsuru Onose, Tokyo, JP;
Noriaki Tominaga, Hiroshima, JP;
Takehiko Saito, Hiroshima, JP;
Yasutsugu Yoshimura, Kawasaki, JP;
Hirotomo Tagata, Hiroshima, JP;
Keiichi Sato, Hiroshima, JP;
PRIMETALS TECHNOLOGIES JAPAN, INC., Tokyo, JP;
Abstract
Mash seam welding is performed to weld metal plates with thicknesses of 2 mm or more to stabilize the strength of a joint portion, reduce uneven parts of the joint portion, and ensure high strength and reliability of the joint portion. First, two metal plates, clamped with first and second clamping devices, are placed to overlap each other at their end portions. The overlapping portions (L) of the metal plates are pressed together with a pair of upper and lower electrode wheels while welding currents flow to continuously weld the overlapping portions (L) and join the metal plates. The pressing forces applied to the electrode wheels are controlled so that upper and lower welding forces acting upon the overlapping portions are equal to each other during the time when the overlapping portions are continuously welded.