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. 22, 1988
Filed:
Mar. 03, 1987
Applicant:
Inventors:
Toshihiro Nishiwaki, Kanagawa, JP;
Shozo Yamaguchi, Kanagawa, JP;
Assignee:
Obara Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B23K / ;
U.S. Cl.
CPC ...
219 89 ; 219 867 ; 2191171 ;
Abstract
A welding machine controller for controlling the welding operation of a welding machine controls welding force applied to a workpiece by directly controlling a pressure regulating valve which regulates the pressure of working fluid supplied to a power cylinder for applying a welding force to the workpiece. The welding machine controller further controls squeeze time, welding time, hold time, OFF time, cooling time and welding current. The welding force is regulated in a single step or in a plurality of steps during one welding cycle according to the quality and/or thickness of the workpiece.