在无数控机床的情况下,模具曲线型面的加工多采用划线、立铣、刨削、插削,再由钳工用样板修成。这种方法工艺性差、工效低、质量不好。我厂在铣削曲线形工件时利用立铣刀中心线的轨迹与工件外形有一定关系的原理,直接用普通立铣加工,其精度可达三级,光洁度达5。现以图示工件为例,其椭圆孔长轴为50毫米、短轴为30毫米,取椭圆孔中心为原点,作直角坐标,则此 In the case of no CNC machine tools, the mold curve surface processing and more use of crossed, end milling, planing, chipping, and then by the fitter repair with the template. This method is poor workmanship, low efficiency, poor quality. I mill in the use of curved workpiece curve milling cutter centerline trajectory and the workpiece shape has a certain relationship between the principle of direct use of ordinary milling, the accuracy of up to three, the finish of 5. Now the workpiece as an example, the long axis of the elliptical hole is 50 mm, the short axis is 30 mm, taking the center of the elliptical hole as the origin, for rectangular coordinates, then