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:
May. 24, 2022
Filed:
Oct. 31, 2018
Citizen Watch Co., Ltd., Nishitokyo, JP;
Citizen Machinery Co., Ltd., Kitasaku-gun, JP;
Takaichi Nakaya, Higashimurayama, JP;
CITIZEN WATCH CO., LTD., Nishitokyo, JP;
CITIZEN MACHINERY CO., LTD., Kitasaku-gun, JP;
Abstract
Disclosed is a friction welding method including: a heating step wherein, in relation to joining surfaces (S, S) defined by opposite end surfaces of a pair of materials (W, W), the pair of materials (W, W) are moved from a state in which their axes are unaligned with each other, in a direction for aligning the respective axes with each other, to a prescribed position where the joining surfaces (S, S) are brought into contact with each other and friction heated; and a pressure contacting step wherein the pair of materials are brought into pressure contact with each other. The method is characterized in that the heating step and the pressure contacting step are carried out while rotating each of the materials (W, W) at the same rotation speed in the same direction, as seen from one side in the axial direction.