The Influence of Part Geometry on Changes of the Dynamic Geometric Parameters of Cutting Tools and Cutting Conditions when Contour Turning on CNC Lathes

Abstract:

Contour turning is a specific process of the machining on CNC lathes. In the finishing operation, to create the part profile, the turning tool must be moved in a trajectory of a complex flat curve (a toolpath) based on the part profile . The variation of feedrate vector on the toolpath according to the part profile in the machining process will results in changing dynamic geometric parameters of the cutting tool, which affects cutting conditions and machined part quality. This article presents the results of theoretical studies on the influence of part geometry on rake angle, clearance angle, approach angle and end cutting-edge angle of the turning tool. Based on the theoretical development, the authors also set up mathematical expressions that allow to define gouge-free cutting condition and the limit of feedtate for contour turning. An empirical model to define the influence of part geometry on the roughness of the part when countour turning on CNC lathe is also presented in this report.

• Periodical: Applied Mechanics and Materials (Volume 889)
• Pages: 540-546
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.889.540
• Online since: March 2019
• Authors: Bui Ngoc Tuyen, Nguyen Chi Cong
• Keywords: CAM, CNC Lathe, Contour Turning, Dynamic Geometric Parameter

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