2D恒定进给刀路修正在不规则型腔加工中的应用研究

Application of Tool Path Modification for Constant Engagement in 2D Irregular Pocket End Milling

对于2D端铣加工精加工,针对Stori和Wright提出的2D轮廓加工恒定切削率刀具路径生成方法,提出一种新的刀具路径修正算法,通过生成一条新的偏置刀路来调节切削进给,即修正半精加工的刀具路径,使精加工中刀具在精确的偏置刀路上以一个恒定的速率进行加工,减少刀具的偏斜和切削力的变化。在一个复杂的不规则型腔的加工中应用此算法,结果表明精加工阶段的切削力被维持在一个恒定的水平。该算法改善了曲面的加工质量,缩短了加工时间,在提高加工效率和精度方面具有优势。

For 2D contour end milling,a tool path modification algorithm was proposed which improved the tool path generation approach proposed by Stori and Wright.In the algorithm,the semi-finishing tool path was modified and a new offset tool path trajectory was generated,which regulated cutting engagement at a constant level on the finishing path and reduced the variation of cutting force and tool deflection.The algorithm was applied in a pocket with complex and irregular shape.The result shows this algorithm can improve surface quality of final machined contour,reduce the change in cutting force and tool deflection,and reduce the machining time.