计算机集成制造系统 ›› 2013, Vol. 19 ›› Issue (07 ): 1577-1584.

• 产品创新开发技术 • 上一篇    下一篇

基于圆锥直纹面刀具姿态控制的曲线插补算法

耿聪1,2,于东2,张晓辉1,2,张函1,2   

  1. 1.中国科学院大学
    2.中国科学院沈阳计算技术研究所
  • 出版日期:2013-07-31 发布日期:2013-07-31
  • 基金资助:
    国家973计划资助项目(2011CB302400)|国家科技重大专项资助项目(2011ZX04016-071)。

Curve interpolation algorithm based on conical tool posture control

  • Online:2013-07-31 Published:2013-07-31
  • Supported by:
    Project supported by the National Basic Research Program,China(No.2011CB302400),and the National Science & Technology Major Project,China(No.2011ZX04016-071).

摘要: 为提高参数曲线与圆锥直纹面相结合类复杂零件的加工精度,提出一种基于圆锥直纹面刀具姿态控制的曲线插补算法。在该算法中,根据给定圆锥直纹面信息确定圆锥直纹面刀具姿态曲线,实现对刀具姿态的控制;建立虚拟圆弧,将参数曲线与圆锥直纹面刀具姿态曲线间的重参数化问题转化为简单的求解向量夹角问题,从而避免产生多重拟合误差。此外,给出了适用于该插补算法的数控加工程序编程格式。实例验证及分析表明,所提算法能够控制加工中刀具姿态始终在所要求的圆锥直纹面上,并且可在缩短代码段数目的基础上,有效降低运算量和加工误差。

关键词: 圆锥直纹面, 刀具姿态控制, 虚拟圆弧, 曲线插补, 五轴数控加工

Abstract: To promote machining accuracy of industrial products composed of parametric curves and conical surfaces,a curve interpolation algorithm based on conical tool posture control was proposed.According to the given information of conical surface,the tool posture curve was confirmed to control the tool posture.The reparameterization problem between parametric curves and conical tool posture curves was transformed into solving vectorial angle problem by building virtual arc,which reduced the computational cost and error of parameterization.The numerical control programming format suitable for this algorithm was provided.The effectiveness and practicality of proposed algorithm were verified by simulation and actual machining.

Key words: conical surface, tool posture control, virtual arc, curve interpolation, five-axis numerical control machining

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