Abstract
This paper clarifies the analysis method for the undeformed chip thickness and the geometric influence of the tool orientation on the ball-nosed end milling. It has been firstly pointed out that the geometric situations on the determination of the thickness are categorized in three cases based on the relationship among the milling parameters. Secondly each corresponding case has been reduced into a comprehensive equation with introducing a coordinate system of tool axis orientation. Then the result of analysis has been displayed in graphics. Through the analysis of the equations, it was found that the tool axis orientation had direct influence to the undeformed chip thickness. Besides the description of analytical solving procedures, some experiments of undeformed chip thickness have been shown. For example, the distribution of undeformed chip thickness, the cutting length at any position of cutting edge, the area of cutting cross section and so on.
