Tool path generation using C-space for 5-axis control machining

Abstract

This study deals with the method of tool path generation for 5-axis control machining using the ball end-mill. The 5-axis control machining has been used for the particular shapes such as impeller, blade, rotor and groove of tire. On the other hand, it becomes known that this machining has a lot of advantages in case of application to the general shapes such as molds and dies. However, most of present CAM systems for 5-axis control machining have limitations of the functions for the tool collision, the workpiece shape and the method of machining. For that reason, there are many cases that users cannot get the desirable CL data. In regard to the above problem, we apply the 3-dimensional C-Space showing the relationship between all tool positions and postures and the existence of tool collision. The method of tool path generation devised in this study enables users to generate CL data reflecting their own machining strategy such as the continuous change of tool posture and the machining condition. The method allows an impeller to be actually milled in good machining condition without tool collision. As a result, the validity of the method is experimentally confirmed.