异型石材高效锯切优化策略

Optimization Strategy of High Efficient Sawing for Special-Shaped Stone

针对异型石材铣磨效率低下的问题,利用金刚石圆锯片大切割深度的优势,提出一种异型石材高效锯切粗加工优化策略.首先,用边界表示法描述锯切过程中的工件数据结构;其次,提出以八叉树算法搜索材料去除最大深度,获取相应的特征切削点和特征工件顶点,用于构造锯切平面,以实现工件材料去除量最大化;接着,以锯切加工时间最小为优化目标,分析金刚石圆锯片沿锯切平面走刀产生的截交面多边形特性,结合一刀切透方式,给出一种最短锯切行程的进给方向优化方法;最后,对路障球进行锯切工仿真实验.仿真结果表明:在材料去除量为1.091×10^7 mm^3时,相比传统磨削加工,所提锯切加工策略使去材效率提高了近7倍.

Aiming at low efficiency of milling and grinding for special-shaped stone,taking advantage of large cutting depth of diamond circular sawblade,an optimization strategy of highly efficient sawing for special-shaped stone was proposed.First,the boundary representation was used to describe the data structure of workpiece in the sawing process.Second,the maximum material removal depth was searched by octree algorithm,and the corresponding removal points and workpiece convex vertexes were also obtained to construct the sawing plane in order to maximize the removal volume of the material.Third,taking the minimum sawing time as the optimization objective,a feed direction optimization method for shortest cutting stroke was proposed with one-cutting-fits-all machining mode on the basis of analyzing the characteristics of the intersecting polygons generated by sawing workpiece.Finally,the simulation experiment of sawing roadblock ball was carried out.The simulation results show that when the material removal amount is 1.091×10^7 mm^3,the material removal efficiency of the proposed sawing strategy is nearly 7 times higher than that of traditional grinding.