A Dual-Mechanism Approach to Modeling the Average Grinding Forces

• Main Authors: Chi-Chun Ma, 馬其駿
• Other Authors: J-J Junz Wang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/ux7eqs

碩士 === 國立成功大學 === 機械工程學系碩博士班 === 90 === Based on the mechanistic grinding force model for a single abrasive grain, this paper presents a close form expression for the average grinding force in the wheel grinding process. Based on the key geometric features of the grinding process including the surface grit density, the average chip thickness and the average chip width, the grinding wheel is approximated by a milling cutter with evenly spaced cutting teeth of the equivalent geometric characteristics. Convolution concept is applied to the simulated milling cutter to obtain an analytical expression for the average grinding forces in terms of the grinding conditions and grinding constants. Conversely, the unknown mechanistic grinding constants can be calculated from the measured average forces for the given pair of grinding wheel and work material. Furthermore, both shearing grinding force and ploughing grinding force can be separated from total grinding force. Experiments were carried out to prove the model’s predictive accuracy for the average forces and also to verify its efficacy in obtaining the mechanistic constants under various grinding conditions.