A Study of High Speed Precision Orthogonal Cutting

• Main Authors: Chia Chin Liu, 劉嘉進
• Other Authors: Zone Ching Lin
• Format: Others
• Language: zh-TW
• Published: 1993
• Online Access: http://ndltd.ncl.edu.tw/handle/89284055854845163310

碩士 === 國立臺灣科技大學 === 工程技術研究所 === 81 === The main purpose of this thesis is to develop a high speed orthogonal cutting model and also propose a variant pseudo- friction coefficient concept to modify the large deformation finite element formulation and further develop a stress analysis model of chip-tool interface. The workpiece of low carbon steel, diamond tool and carbide tool are used to simulate the high speed cutting process. The cutting force, strain, stress and strain rate of machined workpiece, temperature distribution, chip formation and residual stress will be obatined by this model. Based on these results, we will compare the differences of temperature fields of chip, workpiece and tool under cutting by carbide tool and diamond tool. The effect of different friction coefficient on the high speed cutting using diamond tool is studied. A variant pseudo- friction coefficient concept is proposed to modify the friction stiffness of the large deformation finite element formulation on chip-tool interface to develop a stress analysis model on chip-tool interface. Finally, the cutting force predicted by this model for orthogonal cutting is compare with the previous experimental results, and is found reasonable.