The Development of Seat Track Parts Using Shape Freeze in UHSS

Abstract

[3,4] . [6,7] . 본 연구에서는 Journal of the Korean Society of Manufacturing Technology Engineers 26:1 (2017) 59~65https: //doi.org/10.7735/ksmte.2017.26.1.59 J. Korean Soc. Manuf. Technol. Eng. ISSN 2508 ARTICLE INFO ABSTRACTArticle history:A seat track product is a car seat part that provides a base for vehicle seats. An ultra-high strength steel sheet is used to reduce the weight of vehicle body parts. However, the formability of an ultra-high strength steel sheet is poor because of its very low elongation and very high elastic deformation. For this reason, a new forming technology of an ultra-high strength steel sheet is required. The influence of spring-back of seat track parts on the shape freeze in forming processes was investigated to be solved by adjusting the appropriate tool design such as minus clearance between punch and die, and punch angle. This paper describes how to apply the spring-back prevention technique for improving shape freeze by using the ultra-high strength steel sheet with 980MPa to develop lightweight seat tract parts.