When the traditional CNC system processes complex curves,it generally adopts the method of approximating micro line segments or arc segments,which has low processing accuracy and is easy to cause problems such as tool jitter and machine tool vi-bration.With the development of CAD/CAM technology,modern CNC machine tools are developing in the direction of high speed and high flexibility.Based on the requirements of high-quality processing,a spline curve interpolation technology is proposed.In view of this,the spline curve interpolation technology is summarized.Firstly,the importance of the interpolation technology is ex-plained.Secondly,the spline curve interpolation technology is systematically analysed from the perspectives of feed speed and ma-chining accuracy,and A-Spline interpolation,B-Spline interpolation and C-Spline interpolation are introduced respectively.Finally,the development process and latest research trends of the three interpolation technologies are described,and their future trends are summarized and prospected.
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