CAJ | 학술논문

为解决五轴联动加工复杂曲面过程中的刀具路径不连续问题，提出了五轴数控的刀具路径优化方法。通过五轴NC代码的坐标变换还原有效切削路径，对切削路径进行误差约束下的非均匀有理B样条（NURBS）曲线拟合。对旋转轴路径采用五次样条曲线进行插值，建立切削路径和旋转轴路径的参数映射关系，通过机床逆运动变换求解C^2连续的平动轴路径。实验表明，经过该方法优化后，切削路径和各驱动轴运动路径具有良好的平滑性，显著提高了五轴加工曲面精度和表面质量。
위해결오축련동가공복잡곡면과정중적도구로경불련속문제，제출료오축수공적도구로경우화방법。통과오축NC대마적좌표변환환원유효절삭로경，대절삭로경진행오차약속하적비균균유리B양조（NURBS）곡선의합。대선전축로경채용오차양조곡선진행삽치，건립절삭로경화선전축로경적삼수영사관계，통과궤상역운동변환구해C^2련속적평동축로경。실험표명，경과해방법우화후，절삭로경화각구동축운동로경구유량호적평활성，현저제고료오축가공곡면정도화표면질량。
A tool path optimization system for 5-axis machining was proposed to solve the tool path discontinuity problem in free--form spline machining. The NC codes coordinate conversion was implemented to compute the relative cutting path curve between tool center and work piece. The cutting path optimization based on NURBS curve fitting was proposed to resume contouring continuity. The quintic spline interpolation was implemented to smooth the rotary axes motion and synchronize its parameter to cutting path curve, C2 continuity linear axes motion path can be achieved by the in- verse kinematics transformation. The experiments present that the contouring path and physical axes motion get good smoothness to satisfy the high performance requirements in free--form surface 5- axis machining.