大型曲面薄壁件多点柔性工装装夹布局优化
发布时间:2018-12-24 14:35
【摘要】:采用Python脚本语言对ABAQUS的前处理模块进行二次开发,将铣削力依次加载到铣削区域各点,获得由让刀产生的轮廓度误差与装夹布局关系数据;根据多元非线性回归理论建立以支撑单元布局为设计参数的大型曲面薄板件让刀误差数学模型,并采用全局寻优能力较强的遗传算法进行布局优化。结果表明:优化后的支撑单元布局合理,系统资源利用率最佳,与均匀布局相比轮廓度误差降低了39.1%,满足了飞行器薄板件的高速高精加工需求。
[Abstract]:The pre-processing module of ABAQUS is redeveloped by Python script language, and the milling force is loaded into each point of milling area in turn, and the data of contour error caused by the cutter and clamping layout are obtained. Based on the multivariate nonlinear regression theory, a mathematical model of the error of a large curved sheet plate with the layout of the support element as the design parameter is established, and the genetic algorithm with strong global optimization ability is used to optimize the layout. The results show that the optimized support unit layout is reasonable, the system resource utilization is the best, and the contour error is reduced by 39.1 compared with the uniform layout, which meets the requirements of high-speed and high-precision machining of aircraft thin plate.
【作者单位】: 沈阳航空航天大学;
【分类号】:TG54;TH165
本文编号:2390753
[Abstract]:The pre-processing module of ABAQUS is redeveloped by Python script language, and the milling force is loaded into each point of milling area in turn, and the data of contour error caused by the cutter and clamping layout are obtained. Based on the multivariate nonlinear regression theory, a mathematical model of the error of a large curved sheet plate with the layout of the support element as the design parameter is established, and the genetic algorithm with strong global optimization ability is used to optimize the layout. The results show that the optimized support unit layout is reasonable, the system resource utilization is the best, and the contour error is reduced by 39.1 compared with the uniform layout, which meets the requirements of high-speed and high-precision machining of aircraft thin plate.
【作者单位】: 沈阳航空航天大学;
【分类号】:TG54;TH165
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