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为实现以切削力和去除率为参考的进给率优化策略,研究加工仿真中材料切削几何参数的计算方法.采用双层次八叉树体素模型表达加工工件,隐式曲面方程表达刀具扫描体,依据灰色体素中三角面片的位置信息计算有效体积系数,在材料去除仿真的布尔减运算中计算去除率、切削深度和宽度,最后,推导出进给率与材料去除率的关系式,依据给定的去除率参考值可求出进给率优化值.实验表明,在材料去除仿真过程中能够准确计算去除率、切削面积、切削深度和宽度,利用优化关系式可以得去除率约束条件下的进给率优化值.
In order to realize the feed rate optimization strategy based on the cutting force and removal rate, the calculation method of material cutting geometric parameters in machining simulation is studied.The two-level octree voxel model is used to express the workpiece and the implicit surface equation is used to express the tool scanning The effective volume coefficient is calculated according to the position information of the triangular facets in the gray voxel and the removal rate, the depth of cut and the width are calculated in the bool subtraction of the material removal simulation. Finally, the relation between the feed rate and the material removal rate is deduced , The feedrate optimization value can be calculated according to the reference value of the removal rate.Experiments show that the removal rate, the cutting area, the depth of cut and the width can be accurately calculated in the material removal simulation process, and the removal rate constraint Feed rate optimization under conditions.