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The paper deals with the method of tool path generation for 5-axis control machining using a ball end mill. 5-axis control machining has been used for aircraft parts as well as for complicated shapes such as mold and dies. However, most of the present CAM systems for 5-axis control machining have limited functions in terms of tool collision, workpiece shapes and machining methods. For that reason, in many cases the optimal cutter location (CL) data cannot be obtained or considerable time is consumed. To solve this problem, we applied a 3-dimensional configuration space (C-Space) and showed the relationship between all tool positions and postures and the existence of tool collision. The method of tool path generation devised in the study enables users to generate CL data reflecting their own machining strategy such as smooth change in tool posture and the state of machining without considering the gouging. The validity of this method was experimentally confirmed by successfully milling an impeller without tool collision occurring.

This s t u 4 deals with how to generate 5-axis control rough cutting NC data. The 5-axis control machining offers the potential of eficient and accurate machining. However, present CAM systems for 5-axis control are lacking in generality and functions for the tool path generation. Although the rough cutting is the most important process influencing the machining time and the condition in the following finishing process, a lot of diflculties arise to perfom 5-axis control rough cutting. Especially, the collision between a tool and surrounding objects is still a severe problem. This paper suggests the collision-fee tool path generation for 5-awis control rough cutting, taking account of efficiency and accuracy. The devised method allows an impeller-like shape to be actually milled with eficiency and accuracy. As a result, the validity of the method is experimentally confirmed.

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