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改进的等残余高度加工自由曲面刀具路径生成算法
引用本文:赵世田,赵东标,付莹莹,等.改进的等残余高度加工自由曲面刀具路径生成算法[J].南京航空航天大学学报,2012,44(2):240-245.
作者姓名:赵世田  赵东标  付莹莹  
作者单位:1. 南京航空航天大学机电学院,南京,210016;盐城工学院机械工程学院,盐城,224051
2. 南京航空航天大学机电学院,南京,210016
3. 德州学院机电工程系,德州,253023
基金项目:国家自然科学基金,航空科学基金
摘    要:提出了改进的等残余高度算法用于加工自由曲面刀具路径生成。算法在生成相邻刀具路径轨迹时分两步,首先根据当前刀具路径轨迹,采用了Newton-Raphson迭代法精确求取刀具运动包络体上的点到自由曲面的距离,结合给出的Newton迭代法的迭代角度初值计算方法,精确求取满足要求的等残余高度点构成等残余高度线;然后根据求取的等残余高度线精确求取相邻刀具路径轨迹,求取过程类似。验证实例表明,该方法可极大地减少刀具路径轨迹长度,均匀曲面加工残余高度,提高曲面加工质量。

关 键 词:自由曲面  改进的等残余高度算法  刀具路径生成

Improved ISO-Scallop Tool Path Generation Algorithm for Free-Form Surface Machining
Zhao Shitian , Zhao Dongbiao , Fu Yingying , Lu Yonghua , Liu Kai.Improved ISO-Scallop Tool Path Generation Algorithm for Free-Form Surface Machining[J].Journal of Nanjing University of Aeronautics & Astronautics,2012,44(2):240-245.
Authors:Zhao Shitian  Zhao Dongbiao  Fu Yingying  Lu Yonghua  Liu Kai
Institution:1(1.College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China;2.College of Mechanical Engineering,Yancheng Institute of Technology,Yancheng,224051,China;3.Department of Mechanical and Electrical Engineering,Dezhou University,Dezhou,253023,China)
Abstract:Improved ISO-scallop tool path generation algorithm is presented for free-form surface machining.The novel tool path generation algorithm includes two steps.Firstly,the Newton-Raphson iteration method is used to calculate the distance from the point of the tool swept volume to the free-form surface.The method for calculating the initial iteration angle combined with Newton iteration method is given to find the precise ISO-scallop point to construct the ISO-scallop curve according to current cutter contact tool path.Secondly,the neighbor cutter contact tool path is calculated from the ISO-scallop curve.The procedure is similar to the former one.Application example of the algorithm demonstrates that the total tool path length is reduced greatly,and the scallop distributed on the free-from surface is uniform and the machining quality is high.
Keywords:free-form surface  improved ISO-scallop  tool path generation
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