公开(公告)号：US20180229284A1

公开(公告)日：2018-08-16

申请号：US15896110

申请日：2018-02-14

Applicant: ROLLS-ROYCE plc

Inventor： Martin TUFFS ,  Craig A. JOHNSON

IPC: B21B13/10 ,  B21B45/00

CPC classification number: B21B13/10 ,  B21B45/00 ,  B21B2205/00 ,  B21D22/16

Abstract: A method of shear forming a component comprises the steps of: (i) providing a pre-formed metallic sheet blank, the sheet blank having a first surface and an opposite second surface, the perpendicular separation between the first surface and the second surface defining a thickness of the sheet blank; (ii) applying a surface modification process to the first surface of the sheet blank to reduce a surface roughness of the first surface to a first predetermined roughness value; (iii) positioning the second surface of the sheet blank against a mandrel; and (iv) applying a roller to the first surface of the sheet blank in a shear forming operation to form the sheet blank into the component.