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在数控加工中,设置正确的坐标系,通过对刀来获得工件坐标系原点的位置,是控制刀具正确的运动轨迹和保证加工质量的必要前提。本文以反射罩零件为例,探讨了在加工过程中工位转角后,其45°抛物面数控铣削加工的对刀原理和方法,创新提出了转角工位偏置计算间接对刀法,推导出工件坐标系原点的理论计算公式。最后运用加工中心(VMC850B)加工出反射罩的实体形状,通过与传统对刀方式的对比,表明偏置计算间接对刀法不仅提高了加工精度,还有助于提高生产效率,适用范围广泛。
In NC machining, setting the correct coordinate system and obtaining the position of the origin of the workpiece coordinate system through the tool alignment are the necessary preconditions for controlling the correct tool path and ensuring the machining quality. This paper takes reflector parts as an example to discuss the principle and method of the 45 ° paraboloid NC milling process after the corner of the station in the process of machining. Innovatively put forward the indirect tool setting method of corner station offset calculation, Coordinate system origin of the theoretical formula. Finally, the processing center (VMC850B) is used to fabricate the shape of the reflector. Comparing with the conventional method, the indirect tool setting method of offset calculation not only improves the machining accuracy, but also improves the production efficiency and has a wide range of applications.