自适应数控编程与加工系统的设计与实现

Design and Implementation of an Adaptable NC Programming and Machining System

针对数控加工中编程与加工分离、制造与测量分离、系统间信息阻滞等问题,设计了一种集数控编程、实时控制和在线测量为一体的辅助制造系统,称为自适应数控编程与加工系统,并实现了一个原型系统。该系统包括基于PC的规划器和基于运动卡的控制器两部分,两者通过数据总线连接在一起。通过规划器和控制器的分工与协作,该系统集成了CAD信息的提取、工艺规划、代码生成与验证、机床控制以及在线测量等功能,并且能够根据工件信息以及毛坯的实际尺寸和装夹位置等自适应地进行工艺规划和加工,其可行性通过加工实验进行了验证。

In order for a change to conventional CNC machining,which has long been hindered by separated systems for programming ,machining and measuring processes, an integrated system namely adaptable NC programming and machining system （ANPAS） was proposed and a prototype was developed. ANPAS is a computer-aided manufacturing system with integrated functionalities of NC programming,real-time control and on-machine measurement. It consisted of a PC based planner and a motion card based controller, which were connected via data bus. With the planner and the controller and their collaboration, ANPAS is capable of automatic CAD model interpretation, process planning, code generation and validation, machine control, and on-machine inspection. Furthermore, it is also adaptable and able to perform the process planning and the machining tasks according to the CAD model, the measured size and position of the raw workpiece. The feasibility was demonstrated through the machining of a sample part on turning machine with the prototype system.