US 11,890,660 B2
Preparation method for metal material
Fei Chen, Shanghai (CN); Guangshan Wu, Shanghai (CN); Zhenshan Cui, Shanghai (CN); Jiao Zhang, Shanghai (CN); and Baode Sun, Shanghai (CN)
Assigned to SHANGHAI JIAO TONG UNIVERSITY, Shanghai (CN)
Filed by SHANGHAI JIAO TONG UNIVERSITY, Shanghai (CN)
Filed on Aug. 23, 2022, as Appl. No. 17/894,124.
Application 17/894,124 is a continuation in part of application No. PCT/CN2021/119780, filed on Sep. 23, 2021.
Claims priority of application No. 202011436500.1 (CN), filed on Dec. 11, 2020.
Prior Publication US 2022/0402012 A1, Dec. 22, 2022
Int. Cl. B21D 13/10 (2006.01)
CPC B21D 13/10 (2013.01) 12 Claims
OG exemplary drawing
 
1. A preparation method for a metal material, comprising:
horizontally placing a to-be-prepared metal material between wavy surfaces of a female die and a male die, wherein the female die and the male die respectively include a plurality of first mountain-shaped features having the wavy surfaces, and the plurality of first mountain-shaped features are substantially identical;
starting a press machine which is connected to the male die, and pressing the metal material through the male die, so that the metal material makes complete contact with the male die and the female die;
ejecting the pressed metal material, horizontally overturning the metal material, and then placing the metal material between the wavy surfaces of the female die and the male die, wherein the pressed metal material has a plurality of second mountain-shaped features;
repeatedly performing the pressing process, ejecting a re-pressed metal material, horizontally overturning the re-pressed metal material again, then, placing the re-pressed metal material between the wavy surfaces of the female die and the male die, and repeatedly performing the pressing and overturning processes until accumulated strain of the metal material meets a requirement; and
taking out the metal material after the deformed metal material is flattened by a plane die.