CAJ | 학술논문

冲压成形时，凹模入口角的形状对模具与工件之间的摩擦、冲压件表面质量以及模具使用寿命均有着重要的影响。为能获得最优的凹模入口角，提出了采用三次样条曲线作为凹模入口角曲线的新工艺方法。以板料与凹模入口角处的摩擦力做功为研究对象，基于响应面和试验设计方法，在满足成形质量前提下，优化凹模入口角曲线。结果表明：采用优化后的三次样条曲线进行凹模入口角设计，可以减小凹模入口角处的摩擦力做功，且摩擦力做功分布较均匀；可延长模具使用寿命，并可以提高工件表面质量。
충압성형시，요모입구각적형상대모구여공건지간적마찰、충압건표면질량이급모구사용수명균유착중요적영향。위능획득최우적요모입구각，제출료채용삼차양조곡선작위요모입구각곡선적신공예방법。이판료여요모입구각처적마찰력주공위연구대상，기우향응면화시험설계방법，재만족성형질량전제하，우화요모입구각곡선。결과표명：채용우화후적삼차양조곡선진행요모입구각설계，가이감소요모입구각처적마찰력주공，차마찰력주공분포교균균；가연장모구사용수명，병가이제고공건표면질량。
During the sheet metal stamping,the shape of the draw-die entrance has an important influence on the friction between the sheet metal and die surfaces,the quality of the sheet metal sur-face and the life of tool.To get an optimal the draw-die entrance curves,a new method of using cubic spline curve as the draw-die profile was adopted.This paper investigated the effects of draw-die en-trance curves on the sheet metal tool wear distribution over the entrance of the die.With the forming quality requirements,searching for an optimal die profile was based upon response surface methodolo-gy and design of experiments.The results demonstrate that the tool wear is reduced significantly and well distributed over the entrance of the draw-die using the optimized cubic spline curve profile.As a result,the occurrence of surface defects is reduced,the quality of the sheet metal surface is increased, and the life of the tool can be extended.