样条曲线轮廓钢管弯曲成型模型与CAE分析

摘要

提出样条曲线轮廓钢管弯曲成型工艺的CAE方法．根据弹塑性理论建立了钢管弯曲回弹模型，提出圆弧链拟合模型和多折线拟合模型分别对样条曲线轮廓钢管进行拟合，并根据回弹模型和拟合结果确定弯曲工艺参数．研究结果表明：采用17段折线拟合试件样条曲线，只需一副模具，误差均在2mm之内，提高了工艺设计效率和可行性，在机械制造领域具有实用价值．%CAE（ Computer Aided Engineering） Method on forming process of spline curve profile pipe is presented. Based on elastic-plastic theory a bending springbaek model of steel tube was established; an arc chain fitting model and a polyline fitting model was proposed and applied to fit spline curve profile steel pipe. According to rebound model and fitting results the bending process parameters was to determine. The results show that 17 segment polyline applied to fit spline curve of test piece, the error is within 2mm, just a pair of mold needed. The method can significantly improve the efficiency of process design and feasibility, and has practical value in the field of machinery manufacturing.