کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
781867 | 1464537 | 2012 | 11 صفحه PDF | دانلود رایگان |
Motivated by the excellent performance of three-axis NURBS interpolation, this paper presents a numerically efficient and accuracy controllable five-axis sculptured surface machining method with dual NURBS curve. Unlike the traditional three-axis NURBS interpolation, a dual NURBS format of the five-axis toolpath is developed to accurately and smoothly describe the tool movement in the part coordinate system. Different from the subdivision methods using the Taylor series expansion or inverse function, a piece-wise Bézier curve method is implemented to fast subdivide the NURBS curve within the user-defined tolerance. A generic rotation tool center point management module is also designed to realize the coordinate transformation and adaptive nonlinear error control for major five-axis machine tools. The overall effectiveness of the proposed five-axis NURBS machining scheme is demonstrated by the five-axis machining of an impeller’s flow channel.
► We design a NURBS machining strategy for the five-axis machining.
► We use the dual NURBS curve to accurately and smoothly describe the five-axis toolpath.
► A generic Rotation Tool Center Point (RTCP) management module is also designed.
► The nonlinear error could be adaptively controlled within a user-defined tolerance.
Journal: International Journal of Machine Tools and Manufacture - Volume 53, Issue 1, February 2012, Pages 107–117