中文摘要：

针对3轴铣床的半精铣削加工,提出一种降低加工成本的刀具序列优选方法。假设粗加工完成后,残留量已经足够小,半精加工中只需要一次切削就可完成。加工中为防止干涉,型腔表面每一点总对应一个最大的可用刀具;为提高效率,应尽可能使用大刀具。基于这些认识建立毛坯状态和状态转移方程,构建刀具序列优选的动态规划模型。从机时角度对动态规划中的关键问题——代价函数进行分析,提出利用刀具及曲面曲率信息的代价函数计算方法。以修改的Rosenbrock香蕉函数测试曲面为例,采用提出的刀具序列优选算法进行仿真分析,证明了方法的可行性和有效性。

英文摘要：

An efficient method for selection of tool sequence leads to the lower of cost of semi-finishing of mold cavity on a 3-axis mill machine is proposed.Suppose that the rough machining has completed,so the redundant slice is thin enough and can be removed with a single pass of the semi-finishing cutter.To guarantee the cutting operations do not gouge the desired surface,there is a largest cutter which can be used at any part of the surface.On the other hand,to improve efficiency,large cutter should be priority selected.Redundant state of the mold,state transition equations and dynamic programming model for tool sequence selection are formulated.Focusing on machining time,the key problem in dynamic programming,i.e.the cost function is analyzed.A method for evaluating the cost function based on the curvature analysis of tool and surface is proposed.Taking the surface of the Rosenbrock function as a test example,simulation analysis of the tool sequence selection method indicates its practicability and availability.