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五轴数控渐进成形中挤压工具姿态的确定
英文标题:Determination on pressing tool posture in the five-axis CNC incremental forming
作者:韩福辰 朱虎 
单位:沈阳航空航天大学 
关键词:板材成形 数控渐进成形 挤压工具姿态 三角面片 刀位点 
分类号:TG335.5
出版年,卷(期):页码:2017,42(11):84-88
摘要:
在基于STL模型的五轴数控渐进成形中,为了避免三角面片边界处挤压工具的姿态发生突变现象,提出一种挤压工具姿态确定方法。首先,根据挤压工具头中心点与三角面片的位置关系,将工具头中心点分为位于三角面片顶点、三角面片边和三角面片内部3种类型;然后,对不同类型的工具头中心点,分别采用不同的距离加权算法,计算工具头中心点的法向量;最后,根据工具头中心点的法向量和挤压工具轴相对于工具头中心点法向量的引导角和倾斜角,确定挤压工具姿态。采用VC++和OPENGL完成算法的系统实现。算法应用实例表明,所确定的挤压工具姿态变化平缓,在三角面片的边界处,没有发生挤压工具姿态突变现象,软件运行稳定可靠。
In the five-axis CNC incremental forming based on STL model, in order to avoid the postural mutation of pressing tool at the edges of triangular facets, a method for determining the postures of pressing tool was proposed. Firstly, according to the position relationship between the center points of pressing tool head and the triangular facet, the center points of pressing tool head were classified into three types that were located on the vertex of triangular facet, the edges of triangular facet and the inside of triangular facet; and then the normal vector of different types of tool head center points were calculated by the algorithms with the different distance weighting algorithm respectively. Finally, the pressing tool postures were determined according to the normal vector of the tool head center points and the leading angles and inclining angles between the pressing tool axis and the normal rector of the tool head center points. The system of algorithm was implemented by VC ++ and OpenGL. The results show that the pressing tool postures are changed gently without postural mutation of the pressing tool at the boundary of triangular facet, and the operation of software is stable and reliable.
基金项目:
国家自然科学基金资助项目(51175351)
作者简介:
作者简介:韩福辰(1988-),男,硕士研究生 E-mail:Hanfuchen@qq.com 通讯作者: 朱虎(1964-),男,博士,教授 E-mail:zhuhu10@163.com
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