TB5钛合金凸弯边橡皮成形中侧压块优化设计

TB5钛合金凸弯边橡皮成形时易失稳起皱.将起皱缺陷量化作为优化目标,以凸弯边起皱为缺陷考察指标和侧压块优化的目标函数,基于有限元模拟和试验设计,对不同几何参数下的侧压块橡皮成形进行了有限元模拟,分析了几何参数对起皱指标的影响程度,应用响应面法建立侧压块几何参数和起皱评价指标间的函数关系,并用拟牛顿法进行优化.建立了优化参数和成形指标间的近似函数关系及侧压块优化设计模型.通过试验验证该优化方法的有效性和正确性.

Design and optimization of elimination tool in rubber forming of TB5 titanium

Wrinkling will occur in the rubber forming of convex flange, even for the forming of TB5 titanium when the flange height is higher. Wrinkling was quantified as objective functions. The rubber forming process with different side blank holder parameters were simulated based on the optimum design and FEM. Influences of different side blank holder parameters on the wrinkling were analyzed. The relationship with forming index was approximately expressed as a polynomial function. Optimal parameters were obtained using proper optimization methods based on the response surface methodology and quasi-Newton method. Practicability and validity of the optimization methods proposed in this work were verified by experiments.