基于直纹曲面重构的铝合金薄壁件加工变形误差补偿方法

Machining Deformation Error Compensation Method of Aluminium Alloy Thin-walled Parts Based on the Ruled Surface Reconstruction

由于薄壁件低刚度特性导致常规单一几何规划编程的数控精加工质量难以保证,根据多步迭代补偿法,提出采用构造直纹曲面补偿面对刀具轨迹进行修正,进而建立基于加工变形误差补偿的刀轨优化算法。最后,利用加工试验进行验证分析,试验结果表明所建立的加工变形补偿方法正确可靠。

Due to the low-rigidity of the thin-walled parts, it was difficult to guarantee the quality of NC finish machining by conventional single geometric programming. According to the multi-step iterative compensation method, the tool path optimization algorithm based on cutting deflection error compensation was proposed by reconstructing compensatory surfaces of ruled surface to correct the original tool paths. Finally, the cutting experiment was carried out based on the algorithm. The result shows that the method of the machining deformation error compensation is correct and reliable.