基于块状屑统计分析的平面陶瓷切割—推磨加工推磨力与裂纹扩展试验研究
2018-08-17
作者：姚巨坤，江宏亮，杨绪啟，孟凡卓
单位：陆军装甲兵学院
摘要：对金刚石砂轮推磨平面Al2O3陶瓷加工过程中碎屑的尺寸进行分类，计算了不同类型碎屑的碎屑比。通过对碎屑的分类统计，结合推磨力，研究了基于裂纹扩展效应的陶瓷切割—推磨复合式平面加工过程中推磨速度与磨削深度对裂纹扩展强弱的影响规律。结果表明：基于裂纹扩展效应的陶瓷切割—推磨复合式平面加工技术中，碎屑以尺寸大于0.7mm的碎屑为主，平均约占材料去除的50%以上。基于裂纹扩展效应的陶瓷切割—推磨复合式平面加工技术中，整体块占比、推磨力均随着推磨速度、磨削深度的增加而增加。结合Ⅱ型、Ⅲ型碎屑比，推磨力F推磨速度在14.4mm/min、磨削深度在0.7mm附近，裂纹扩展效果最为显著。根据试验，确定块占比为50%作为区别推磨加工与普通平面加工的依据。
关键词：工程陶瓷；裂纹扩展；砂轮磨损
中图分类号：TG707；TH145.1文献标志码：A
Wear Characteristics Analysis of Diamond Grinding Wheel
Based on Gray Level Cooccurrence Matrix
Yao Jukun，Jiang Hongliang，Yang Xuqi，Meng Fanzhuo
Abstract:The size of the debris during the grinding process of the diamondgrinding plane Al2O3 ceramic is classified，and the debris ratio of different types of debris is calculated.Based on the classification and statistics of the debris and the pushin force，the influences of the grinding speed and grinding depth on the crack propagation strength are investigated based on the crack growth effect in the process of the ceramic cuttingpushing composite plane machining.The results show that in the composite cutting technology based on crack propagation，the size of debris is larger than 0.7mm，and the average size of the debris can account for more than 50% of the material removal.Based on the crack propagation effect of ceramic cuttinggrinding plane composite processing technology，the overall fast ratio，push the grinding force with the grinding speed，grinding depth increases.Combining the type Ⅱ and type Ⅲclastic debris ratio，the pushing force F pushed at a speed of 14.4mm/min，the grinding depth of 0.7mm near the crack propagation effect is most significant.According to the experiment，it is confirmed that the proportion of blocks is 50% as the basis for the difference between the grinding processing and ordinary plane processing.
Keywords:engineering ceramics；crack growth；wheel grinding