Normal-Unit-Vector-Based Tool Path Generation Using a Modified Local Interpolation for Ball-End Milling

Abstract

This paper describes a novel tool path generation for three-axis ball-end milling using a local interpolation. After a modified local interpolation using normal unit vectors is introduced, generation of a parametric offset geometry is presented based on the local interpolation. In tool path generation, determination of a path interval and tool feed planning, which can be applied to both the scanning-line and contour-line machining, are proposed using normal unit vectors. Through their examples, it was verified that the proposed procedures possessed simplicity and flexibility.

Keywords

• tool path generation
• path interval determination
• modified local interpolation
• offset surface
• nc machining