分区变压边力充液拉深工艺的优化

Research for optimization of hydro-mechanical deep-drawing technology adopting segmented binder variable blank holder force

文章以高精度车灯反射镜为研究对象,采用分区变压边力充液拉深新工艺进行研究,并对其分区和变压边力组合进行优化。采用MATLAB的cftool模块对原变压边力进行曲线拟合,得出与4种分区对应的曲线方程;利用SPSS18.0对方程参数和分区角度组合进行正交设计,在eta/DYNAFORM中进行数值模拟验证,得出最优参数组合;并通过实验验证模拟结果。实验结果表明,应用最优分区变压边力充液拉深所得到的零件,较优化前,无论是成形精度还是厚度分布的均匀性都有很大的提高,厚度减薄量更小。

A high-precision reflector lamp was taken as the research object.Firstly,using cftool module of MATLAB for curve fitting of original blank holder force,4 curve equations in correspondence to different zones were derived.Then,making orthogonal design with the combination of SPSS18.0 equation parameters and zoning angle and carrying on numerical simulating verification with eta/DYNAFORM,optimal parameter combination was derived.The simulating result was verified by experiment.The experimental results show that the quality of the part using the optimized technology is improved in increasing the forming accuracy and thickness uniformity,and decreasing the thickness reduction.