摘要
在单点渐进成形技术中,刀具路径是加工时刀具在空间中的运动轨迹。本文使用有限元分析软件ANSYS/LS-DYNA模拟了刀具路径对渐进成形过程的影响。模拟结果表明:当刀具四点压下时,模拟的轮廓曲线对称性最好,底面上凸的幅度较小;同时,板材的最大等效应变和主要变形区节点的塑性应变较小,板材连续逐层变形能力较好。
Tool paths are moving trace of tool in space in the process of Single point incremental sheet forming. This paper presents a numerical investigation on the influence of tool paths by modeling the forming process. ANSYS/LS-DYNA is used for the simulation. The resuits of study show that the four screwdown points optimization paths is an effective method to increase the accuracy of the numerical, and the maximum von strain of sheet and plastic strain of side node are smaller than one screwdown point paths and two screwdown points paths, which indicates that the continuous layered deformation capacity of sheet metal is better with four screwdown points tool paths.
出处
《机电产品开发与创新》
2008年第2期148-149,159,共3页
Development & Innovation of Machinery & Electrical Products
关键词
无模成形
板材成形
渐进成形
有限元
刀具路径
die-less forming
sheet metal
incremental forming
finite element method
tool paths
