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发表时间： 2017-01-01

发表刊物： 光学精密工程

所属单位： 机械工程学院

卷号： 25

期号： 8

页面范围： 2106-2112

ISSN号： 1004-924X

摘要： Ultrasonic assisted grinding is an effective way for trepanning the core rod, but the brittle fracture is the main manner to remove the hard and brittle materials during ultrasonic assisted grinding, leading to dimension error between the rod diameter and the inner diameter of the grinding wheel. Aiming at the above problem, based on the theory of indentation fracture mechanics and the kinematic analysis of diamond grains on the grinding wheel, a prediction model of the rod diameter was established, during which the effects of the expansion of the lateral cracks on the rod diameter were considered at the same time. Subsequently, the model was calibrated and verified through the test of ultrasonic assisted trepanning of core rod of K9 optical glass. The effect of the feed and spindle speed on the rod diameter was studied. The comparison experiment indicates that the simulation results are in good agreement with the experimental results, and the error is within 5%, which verifies the validity of the model. The experimental results show that the diameter error of the core rod can be reduced effectively with lower speed and higher feed rate during ultrasonic assisted grinding. The established prediction model of the rod diameter can offer theoretical guidance to the selection of the grinding wheel for trepanning the core rod with ultrasonic assisted grinding. ? 2017, Science Press. All right reserved.

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