Abstract
In this paper, a simulation method for analysis of the surface texture taking motion error of the machine tool into consideration is proposed and the influence of tool run-out on the surface texture is examined. By comparing simulated results with the actual surface texture of a metal mold machined by a ball-end mill, the influence of tool run-out on the surface texture is evaluated. The tool run-out hardly affects the surface texture in cases in which the feed marks are made by only one edge of the ball-end mill. Furthermore, the surface roughness reaches a minimum at a certain tool tilting angle when a ball-end mill with large tool run-out is used. Finally, the machined surface roughness is calculated based on the cusp height commonly used for the machining of metal molds when the tool run-out is varied. From this relationship, the allowable tool run-out to obtain the required surface roughness can be effectively estimated.
