A study of abrasive wear behavior of blanking dies for high tensile strength steel

Abstract

The objective of this research was to study the effect of tool material on wear behavior of blanking die. Four punch material: JIS SKD11, SKD12, SKS3 and S50C, were specified for the hardness of 60 ± 2 HRC. Clearance between punch and die was 8% of workpiece thickness. The high strength steel, JIS G3135 SPFC440 steel strip with thickness 1.0 mm was experimented. The strip was blanked into circular shapes of 25 mm in diameter. Each punch was used for blanking 6,000 workpieces. The measurement of wear by weight, flank wear and face wear measurement and cutting edge quality. The result of the experiments found from measuring the wear rate. The SKD11 had the lowest wear rate, SKD12, SKS3 were respectively and S50C had the highest wear.