抄録
The purpose of this study is to improve the productivity of the molds and dies for plastic injection by means of developing and utilizing the CAM system which can generate CL data for 5-axis controlled machine tools. In case of machining the molds and dies which have complicated and deep shape in Z-direction, the EDM system is widely used. On the other hand, the 5-axis controlled machine tools are not used effectively even if they have the same machining potential as the EDM system because the CAM system which has the following basic functions for multi-axis machining has not been developed; (1) high speed collision detection between machine tool components and the work material, (2) exact position control to avoid the collision, and (3) high speed and high accurate generation of the tool path for rough cutting, semi-finishing and finishing. In the developed CAM system, the Inverse Offset Method has been used for discerning the cutting area previously where the collision may take place. The new rough cutting method on the basis of the contour line tool path with down cut operation has been developed. The results of the actual machining test show that the developed system has the proper functions of collision detection and position control, and the complicated shape machining with high efficiency is possible.
