Flanging Using Step Die for Improving Fatigue Strength of Punched High Strength Steel Sheet
Year: 2014
Type: conference-paper
Abstract: The fatigue strength of a punched high strength steel sheet having 590 MPa in nominal tensile strength was improved by thickening a hole edge by means of flanging using a step die and round corner punch. The sheared edge was thickened by flanging, and then was compressed with the corner step of the die. The quality of the sheared edge for the thickened punched sheet was improved by ironing with the round corner of the punch during the thickening process. It was found that the fatigue strength of the punched sheet with thickening was larger than that without thickening because of the increases in the thickness, surface quality and hardness in the sheared edge.
Source: Procedia Engineering
Institution: Toyohashi University of Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W1968679211