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Study of residual stresses in tailor rolled blanked Al5J32-T4 sheets

Rare Metals 2006年第z2期25卷 111-117页

作者： KIM Dongok KIM Jinpyeong LEE Yong KWAK Heeman RYU Yongmun HAN Beomsuck Materials & Processing Research Center Korea Automotive Technology Institute (KATECH) 74 Yongjung Ri PungseMyun Chonan Chungnam 330-912 Korea

Several automotive parts such as door panels have been manufactured by using load-adapted blanks for crash optimization and weight minimization. Recently, tailor rolled blanks (TRB) has been introduced to remove the disadvantages of a welding process which was used in joining panel components. TRB offers better structural design capabilities due to the seamless transitions on the panels with different thicknesses. In spite of the advantages of the process, TRB leaves internal stresses in the panel. This residual stresses lower the formability of tailor rolled Blanked (TRBed) parts and cause cracks near severe curvature during subsequent forming processes. In this research, the residual stresses of TRBed Al5J32-T4 sheets were studied by X-ray stress analysis, and also microstructure was observed along the rolling direction. In addition, heat treatment was done after TRB process in order to compare the residual stresses to that of the TRBed sheets before the heat treatment.

关键词： tailor rolled blanks residual stresses deformation microstructure

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The Research on Servo-Flexible Stamping Applied in Sheet Metal Forming of tailored blanks of Advanced High Strength Steel

The Research on Servo-Flexible Stamping Applied in Sheet Met...

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2015中国汽车工程学会年会

作者： Zhimin Liu Jinghai Zhang Zhihui Wang Beijing Automotive Technology Center BAIC MOTOR Co.Ltd.

The advanced high strength steel B pillar was designed to be a tailored blank component which combines tailor welded blanks with tailor rolled blanks,and the formability of the B pillar was studied through the finite element *** new servoflexible stamping can obviously improve the deep drawability of advance high strength steel B pillar,and improve the deepness of B pillar by about 18%.Furthennore,the variable blank holder force curves were optimized,based on the plastic theory and energy method.

关键词： tailor rolled blanks formability variable blank holder force servo-flexible stamping

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