Transactions of Nanjing University of Aeronautics & Astronautics
Mathematical Model and Simulation of Cutting Layer Geometry in Orthogonal Turn-Milling with Zero Eccentricity
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Abstract:
Orthogonal turn-milling is a high-efficiency and precision machining method. Its cutting layer directly affects chip formation， cutting forces， and chatter， and further affects tool life， machining quality， etc. We studied The cutting layer geometry （CLG） in orthogonal turn-milling with zero eccentricity （OTMZE） is studied to explore orthogonal turn-milling cutting layer formation process. OTMZE principles of motion and formation processes are analyzed statically without considering kinetic influences. Mathematical models of the entrance and exit angles， cutting thickness， and cutting depth are established. In addition， these models are validated experimentally and some influences of cutting parameters on the tool cutting layer are analyzed. The results show that OTMZE cutting layer formation can be divided into two stages， chip shapes are nearly consistent with the simulated CLGs， and the most influencial parameter in affecting the cutting layer is found to be the tool feed per revolation of workpiece fa， followed by the ratio of the tool and workpiece speeds λ and the cutting depth ap. These models and results can provide theoretical guidance to clarify formation processes and quantitatively analyze changes in cutting layer geometry during OTMZE. In addition， they offer theoretical guidelines for cutting forces and chatter.
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Clc Number:
TG506.9
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