An accuracy algorithm for chip thickness modeling in 5-axis ball-end finish milling
Chip thickness in milling is one of the most fundamental parameters, which can significantly affect cutting force, cutting heat, cutting stability and machined surface topography for computer-aided process planning. In this paper, a combination of a three-dimensional trochoidal tooth trajectory model (3D3T) and engagement-boundary chip model is developed to determine instantaneous chip thickness in 5-axis ball-end finish milling. In comparison with the chip volume measured in a commercial software package (Unigraphics) the accuracy of the proposed model has been numerically validated with various process parameters including cutting depth, toolworkpiece inclination and cutter runout. The differences in time-varying delay and dynamic chip thickness as well as stability are compared with different models to show the impact of using 3D3T mechanism for chip thickness modeling in 5-axis ball-end finish.
chip thickness ball-end finishing 5-axis mill 3d trochoidal tooth trajectory engagement boundary