基于双节点插值的刀具干涉检查算法

Research on Tool Interference Checking Algorithm Based on Two-node Interpolation

介绍了基于双节点插值的刀具干涉检查的算法。首先构建数字化模型,利用离散三角片代替原始曲面,通过数字化网格节点的竖直线与三角片的刀位面和保护面求交,并取Z值最大的交点为无干涉刀位点;然后再用双节点插值检查因走刀步长不合适而产生的干涉问题,保证生成的刀位轨迹是无干涉刀位轨迹。该算法完全采用几何求交运算,过程简单且精确度高。

Tool interference checking algorithm based on two-node interpolation is introduced. First, build the digital models, using discrete triangle instead of the original surface, through the digital grid nodes vertical line with the triangle knife-bit surface and the protecting surface for finding their intersection, and take the biggest Z values of inter- section pointg the as the interference-free tool points. Then check the value of re-using the two-node interpolation for the interference problemsbecause of the inappropriate tool step length, in order to ensure that the generated tool path is interference-free. The algorithm is fully implemented the geometric intersection operation, and the process is simple and highly precise.