A preparatory handling system for NC machining of small spiral curved surfaces is developed by using FORTRAN language and C langUage. The system operates well on special NC milling machines.

• 采用计算机辅助交互式设计技术，研制了一个小型的螺旋曲面计算机辅助图形数控铣削加工自动编程的前处理系统，该系统用FORTRAN语言和C语言混合编程，在特制的数控机床上运行良好，能有效切削各种复杂截面的圆柱螺旋曲面外表面。