Cong Mao

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The ability of predicting a grinding force is important to control, monitor, and optimize grinding process. Few theoretical models were developed to predict grinding forces when a structured wheel was used in a grinding process. This paper aimed to establish a single grit grinding force model to predict the ploughing, friction and cutting forces in a grinding process. It took into the consideration of actual topography of the grinding wheel, a theoretical grinding force model of the grinding wheel with orderly-micro-grooves was proposed. The model was innovative in sense that it represented the random thickness of undeformed chips by a probabilistic expression, and it reflected the microstructure characteristics of the structured wheel explicitly. Note that the microstructure depended on the randomness of the protruding heights and distribution density of the grits over wheel. The proposed force prediction model was validated by surface grinding experiments, and the results showed (1) a good agreement of the predicted and measured forces and (2) a good agreement of the changes of the grinding forces along with the changes of grinding parameters in the prediction model and experiments. The proposed model was proven its accuracy, reliability and effectiveness in predicting grinding forces by an orderly-micro-grooved grinding wheel.

CBN-WC-10Co 复合材料单纤维切削性能 * 毛 聪 卢 继 梁 昶 张明军 胡永乐 (1. 长沙理工大学汽车与机械工程学院 长沙 410114； 2. 长沙理工大学工程车辆轻量化与可靠性技术湖南省普通高等学校重点实验室 长沙 410114) 摘要：利用放电等离子烧结技术和电火花线切割技术制备了尺寸为 6 mm×0.8 mm×0.8 mm 的 CBN-WC-10Co 复合材料纤维， 刃磨后纤维前角为 0°、后角为 20°、刃口锋利平直，能够将这种 CBN-WC-10Co