AZ31B镁合金不同椭圆度凹模黏性介质温热胀形工艺（英文）

发布时间：2018-06-05 19:29

本文选题：AZB镁合金 + 黏性介质温热胀形　；参考：《Transactions of Nonferrous Metals Society of China》2017年01期

【摘要】：基于不同椭圆度凹模胀形原理,选择具有良好热稳定性和导热性能的甲基乙烯基硅橡胶作为黏性介质,进行AZ31B镁合金黏性介质温热胀形试验,并采用有限元分析软件ANSYS/LS-DYNA对成形过程进行分析。确定AZ31B镁合金黏性介质温热胀形最佳温度,以及凹模椭圆度对AZ31B镁合金黏性介质温热胀形变形规律的影响。同时根据网格应变原理,通过对不同椭圆度极限胀形试件的测量,绘制出AZ31B镁合金黏性介质温热成形极限图(FLD)。研究结果表明,在耐热温度范围内,热态黏性介质能够适应试件几何形状的变化建立非均匀压力场,非均匀压力差值随着椭圆度的增大而减小,根据极限胀形试验绘制出的成形极限图,能够综合反映出零件复杂程度与极限变形程度的关系。
[Abstract]:Based on the bulging principle of die with different ellipticity, methyl vinyl silicone rubber with good thermal stability and thermal conductivity was selected as viscosity medium. The thermal bulging test of AZ31B magnesium alloy adhesive medium was carried out. The finite element analysis software ANSYS/LS-DYNA is used to analyze the forming process. The optimum temperature of thermal bulging in viscous medium of AZ31B magnesium alloy and the effect of die ellipticity on the deformation of thermal bulging in viscous medium of AZ31B magnesium alloy were determined. At the same time, according to the principle of grid strain, the limit diagram of thermal forming of AZ31B magnesium alloy was drawn by measuring the limit bulging specimen with different ellipticity. The results show that in the range of heat-resistant temperature, the thermal viscous medium can adapt to the change of the geometric shape of the specimen to establish a non-uniform pressure field, and the non-uniform pressure difference decreases with the increase of ellipticity. The forming limit diagram drawn from the limit bulging test can comprehensively reflect the relationship between the part complexity and the limit deformation.
【作者单位】：沈阳航空航天大学航空航天工程学部;
【基金】：Project(51575364)supported by the National Natural Science Foundation of China Project(2013024014)supported by the Natural Foundation of Liaoning Province,China
【分类号】：TG306

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