NDLI: Application of mechanical trimming to hot stamped 22MnB5 parts for energy saving

Content Provider	Springer Nature Link
Author	Choi, Hong Seok Kim, Byung Min Kim, Dong Hwan Ko, Dae Cheol
Copyright Year	2014
Abstract	An energy-saving mechanical trimming technology for hot stamped ultra high strength steel sheets is suggested in this study, in which the sheet thickness on the desired trim line is reduced by hot half-trimming at the same time as hot stamping, and the half-trimmed part is subsequently fully trimmed by mechanical trimming. Effectiveness of the proposed process has been investigated by FE-simulation and experiment. In this process, the hot half-trimming depth in hot stamping and the clearance between the punch and die in mechanical trimming were considered to be the main process parameters determining trimmed surface quality, trimming load, and tool wear. A high-quality trimmed surface, as compared with that produced by conventional cold trimming, can be achieved with a large hot half-trimming depth in hot stamping and small clearance in mechanical trimming. It was also shown that production time and cost can be reduced considerably by mechanical trimming using hot half-trimming, with low probability of tool chipping and reduced tool wear, as compared to conventional cold trimming and laser cutting processes. Therefore, mechanical trimming using hot half-trimming as proposed in this study can replace the high energy- and production time-consuming laser cutting process in the mass manufacturing of automotive parts.
Starting Page	1087
Ending Page	1093
Page Count	7
File Format	PDF
ISSN	22347593
Journal	International Journal of Precision Engineering and Manufacturing
Volume Number	15
Issue Number	6
e-ISSN	20054602
Language	English
Publisher	Korean Society for Precision Engineering
Publisher Date	2014-06-05
Publisher Place	Springer
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Energy-saving mechanical trimming Hot half-trimming Hot stamping Ultra high strength steel sheet Trimmed surface Industrial and Production Engineering Materials Science
Content Type	Text
Resource Type	Article
Subject	Industrial and Manufacturing Engineering Mechanical Engineering Electrical and Electronic Engineering

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