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. 13, 2021
Filed:
Feb. 13, 2019
No.59 Research Institute of China Ordnance Industry, Chongqing, CN;
Qiang Chen, Chongqing, CN;
Shuhai Huang, Chongqing, CN;
Jun Lin, Chongqing, CN;
Chuankai Hu, Chongqing, CN;
Xiangsheng Xia, Chongqing, CN;
Zude Zhao, Chongqing, CN;
Yang Wu, Chongqing, CN;
NO.59 RESEARCH INSTITUTE OF CHINA ORDNANCE INDUSTRY, Chongqing, CN;
Abstract
The present invention discloses a forward and backward extrusion composite forming method using a mould having an open inner cavity, including the following steps: (1) the structural design and assembly of the forward and backward extrusion composite mould having the open inner cavity; (2) the preparation of the initial billet; and (3) forward and backward extrusion composite forming. The present invention can greatly improve the length-diameter ratio of the blind hole and is widely used in alloy steel, aluminum alloy, magnesium alloy, copper alloy and other components.