球头铣刀铣削轮廓曲面的有效切削速度分析

Study on Effective Cutting Speed of Milling Contour Surfaces of Ball-end Milling Cutter

对球头铣刀加工轮廓曲面的有效速度进行研究,考虑到球头铣刀倾角变化和工件曲率半径变化,建立了球头铣刀切削凹凸轮廓曲面的干涉模型。采用相对加工倾角的方式解决了高角度铣削的干涉问题,并根据实际有效切削直径得到凹凸轮廓曲面的有效切削速度。研究结果表明:采用小切入角度和大切出角度切削加工曲面时,有效切削速度较小;铣削加工凹曲面时受切深影响较大,凸曲面主要受前后刀轨影响较大。

The effective cutting speed of machining contour surfaces is studied with ball-end milling cutter in this paper.Considering the variation of the inclination angle of the ball-end milling cutter and the radius of the curvature of work-piece,the interference model of concave and convex contour surface milling by ball-end milling cutter is established.The interference problem of high-angle milling is solved by means of the relative machining inclination angle,and according to the actual effective cutting diameter,the effective cutting speed of machining the concave-convex contour surface is obtained.The research results show that the effective cutting speed is small when milling the curved surface with a small plunging angle and a large cutting-out angle,and the concave surface is more affected by the depth of cut during the milling process,and the convex curved surface is mainly affected by the front and rear tool rails.