单点增量成形制件整体精度研究

摘要/Abstract

摘要： 以典型圆锥台作为研究对象，由材料的变形机理出发，解析制件整体精度的机理和主要影响因素。采用Box-Behnken 设计(BBD)试验方法，对主要影响因素中的工具头直径、层间距、板厚、成形角设计四因素三水平曲面响应试验，建立两个方向上几何误差的二阶响应模型，得到工艺参数对制件在水平方向和垂直方向上精度的单一及交互影响规律。最后，利用响应模型对两个方向几何误差进行同步最小优化，得到制件整体精度最优时的工艺参数组合：工具头直径6 mm、层间距0.5 mm、板厚1 mm、成形角45 °，此时两个方向的几何误差分别为1.914 6 mm和-0.157 mm，实现了制件整体精度的工艺优化和稳健控制。

关键词: 整体精度, 曲面响应, 同步优化, 单点增量成形

Abstract: A typical truncated cone was taken as the research object. Based on the deformation mechanism, the causes and main influencing factors of the overall accuracy were analyzed. Then, using the Box-Behnken design (BBD), four-factor three-level response surface experiment was designed for the tool head diameters, layer spacing, sheet thicknesses and forming angles. The second order model of geometric errors in two directions was established. According to the response model, the single and interaction laws of the process parameters on the accuracy in horizontal and vertical directions were obtained. Finally, the response model was used to synchronously minimize the geometric errors of the two directions. The process parameter combination was obtained when the overall accuracy is optimal: the tool head diameter is as 6 mm, the layer spacing is as 0.5 mm, the plate thickness is as 1 mm, and the forming angle is as 45 °. Under these conditions, the geometric errors in two directions are as 1.9146 mm and -0.157 mm respectively. The process optimization and robust control of the overall accuracy of the parts are realized.

Key words: overall accuracy, response surface, synchronous optimization, single point incremental forming(SPIF)

中图分类号:

TP242

柏朗;李言;杨明顺;林允博;赵仁峰;袁启龙. 单点增量成形制件整体精度研究[J]. 中国机械工程.

BAI Lang;LI Yan;YANG Mingshun;LIN Yunbo;ZHAO Renfeng;YUAN Qilong. Research on Overall Accuracy of SPIF Parts[J]. China Mechanical Engineering.

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