The conventional method for machining parts with complex curved profiles on CNC machines is to approximate curved profiles to small line segments (by CAM systems). However, this method has some significant drawbacks, such as the very large size of G-code files generated by CAM softwares, difficulties to track machining processes and feedrate fluctuation caused by acceleration / deceleration control of CNC controllers. In this paper, a method of real-time CNC interpolation is proposed for complex curved profiles described by NURBS (Non-Uniform Rational B-Spline) parametric equations. Simulation results on the Matlab/Simulink software show that the presented method is quite capable of interpolating analytic curves and also free-form curves.
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TẠP CHÍ KHOA HỌC VÀ CÔNG NGHỆ Giấy phép số37/GP-BTTTT (15/01/2021) Giấy phép sửa đổi, bổ sung số140/GP-BTTTT (05/3/2021) Đơn vị cấp phép:Bộ Thông tin và Truyền thông Cơ quan chủ quản:Trường Đại học Bách Khoa Hà Nội Phó tổng biên tập phụ trách:GS. Đinh Văn Phong