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:
Jul. 07, 2015
Filed:
Oct. 10, 2012
Fuji Jukogyo Kabushiki Kaisha, Tokyo, JP;
Kensuke Sakai, Tokyo, JP;
FUJI JUKOGYO KABUSHIKI KAISHA, Tokyo, JP;
Abstract
There is provided a pressure control method for a spot welding apparatus. Upon spot-welding a workpiece while applying a preset pressure to the workpiece by a pressure actuator through a movable electrode and a fixed electrode holding a workpiece and applying a preset sub-pressure by a sub-pressure actuator through a sub-pressure unit, the workpiece is pressed with an initial pressure by the movable electrode and the fixed electrode, and an initial sub-pressure is applied through the sub-pressure unit. After that, the setting pressure is applied to the workpiece by the pressure actuator through the movable electrode and the fixed electrode, and the setting sub-pressure is applied by the sub-pressure actuator through the sub-pressure unit.