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. 25, 2025
Filed:
Jul. 28, 2022
Guannan Chu, Weihai, CN;
Harbin Institute of Technology, Weihai, Weihai, CN;
Guannan Chu, Weihai, CN;
Lei Sun, Weihai, CN;
Wencai Xie, Weihai, CN;
Cunsheng Zhang, Weihai, CN;
Anying Yuan, Weihai, CN;
Gang Fang, Weihai, CN;
Qin Yang, Weihai, CN;
[object Object];
HARBIN INSTITUTE OF TECHNOLOGY, WEIHAI, Weihai, CN;
Abstract
A preforming method for a high-strength steel variable-diameter tubular part is provided, which belongs to the technical field of metal forming process. The preforming method for a high-strength steel variable-diameter tubular part includes: selecting a tubular blank; and preparing a tubular blank forming mold, where the tubular blank forming mold includes a preforming mold and a final forming mold; sealing and pressurizing the tubular blank; heating the tubular blank by using electrodes; preforming the tubular part at a constant temperature; maintaining a temperature Tl and moving the preformed tubular part to the final forming mold; finally forming the tubular part. Through two steps of operation of preforming and final forming, and maintaining a temperature during moving the tubular blank between the two steps, so that the conversion of intrametallic structure between the two steps is improved, and the performance of the tubular part is improved.