Analysis of Hot Forming of a Sheet Metal Component Made of Advanced High Strength Steel
To provide reduction in weight while maintaining crashworthiness and to decrease the fuel consumption of vehicles,thinner components made of Advanced High Strength Steels (AHSS) are being increasingly used in automotive industry.However,AHSS cannot be formed easily at the room temperature (i.e.cold forming).The alternative process involves heating,hot forming and subsequent quenching.A-pillar upper reinforcement of a vehicle is currently being produced by cold forming of DP600 steel sheet with a thickness of 1.8 mm.In this study,the possible decrease in the thickness of this particular part by using 22MnB5 as appropriate AHSS material and applying this alternative process has been studied.The proposed process involves deep drawing,trimming,heating,sizing,cooling and piercing operations.Both the current production process and the proposed process are analyzed by the finite element method.The die geometry,blank holding forces and the design of the cooling channels for the cooling process are determined numerically.It is shown that the particular part made of 22MnB5 steel sheet with a thickness of 1.2 mm can be successfully produced by applying the proposed process sequence and can be used without sacrificing the crashworthiness.With the use of the 22MnB5 steel with a thickness of 1.2 mm instead of DP600 sheet metal with a thickness of 1.8 mm,the weight is reduced by approximately 33%.
Hot Forming Advanced High Strength Steels Finite Element Method
Sinem Demirkaya Haluk Darendeliler Mustafa (I)lhan G(o)kler Murat Ayhaner
METU-BILTIR Center,Middle East Technical University,Ankara,06800,Turkey METU-BILTIR Center and Department of Mechanical Engineering,Middle East Technical University,06800,A R & D Directorate,TOFA(S) Turkish Automotive Factory Co.Inc.,16369,Bursa,Turkey
国际会议
沈阳
英文
421-426
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）