Robust Spiral Tool-Path Generation for Arbitrary Pockets

Abstract

When converting CC data (cutter contact point data) into CL data (cutter location data) for tool-path generation for arbitrary pockets, overcut avoidance plays an important role in CNC pocket milling. Complicated calculations of the selfintersections in the offset of spiral cutting is one of the main considerations in some algorithms. This study presents a quasioffset method to solve complicated self-intersection calculations. Instead of using offsetting methods, the proposed method uses the location points and their track types to generate the son loop. The proposed quasi-offset method also makes it much easier to generate spiral tool paths.

Spiral cutting operation strategy for machining of sculptured surfaces by conformal map approach

“…In this case, some spiral tool path generation strategies are developed. The difficulty in generating spiral tool paths arises from the complicated intersection calculations of the offset entities [11].…”

Selecting optimal tools for arbitrarily shaped pockets

“…The ability to generate tool paths must be developed before the performance test of a tool. This paper adopts the algorithm presented by You et al [8] for avoiding local gouging and for generating tool paths.…”

High speed machining tool path generation for pockets using level sets

“…The direction parallel tool paths are easy to generate, which is the advantage of the direction parallel milling style. However, the repetitious milling operation causes drastic change of cutting force and stress on the tool and the workpiece at high curvature regions along tool paths (You et al 2001). At the same time, the sequential alternation of the up and down milling has a bad influence on machining accuracy during the cutting process.…”