针对具有显著而内异性的钛合金TA2M板料,给出了材料厚向异性指数R值的三角函数分布规律,在此基础上,基于势流原理和边界元法,提出了面内异性的钛合金板料在拉深成形中,凸缘外边界势值按材料的各向异性规律分布的假设,并计算得出合理的毛坯形状.经过试验验证,所建立的方法合理正确,计算得到的毛坯可有效避免凸耳现象的产生.
For the orthogonal TA2M sheet metal,a usable triangle function used to describe the variation of anisotropy R is presented.Based on above description of value R,a new hypothesis that the potential values on flange outer boundary is regularly arranged according to the distribution law of anisotropy R has been proposed and the potential theory and boundary element method are used to calculate the reasonable blank shape which will provide a good method to control the deep-drawing ear for the orthotropic TA2M sheet metal.Through practical application,the presented blank design approach is approved to be efficient for the control of deep-drawing ear.
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