Title: Formation method of hollow and notched parts
Application Number: 200610029203 Application Date: 2006.07.21
Publication Number: 1887464 Publication Date: 2007.01.03
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: B21C25/04
Applicant(s) Name: Liu Shixiong Address:
Inventor(s) Name: Liu Shixiong
Attorney & Agent:
Abstract:
    The method of necking down hollow blank to form hollow part features that one core in the shape of the inner cavity of the required hollow part and of low smelting point alloy is set inside the blank before necking down and molten down at relatively low temperature after necking down to obtain required hollow part.
Time: 19