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Abstract
To realize the high efficiency mirror surface grinding of hard brittle materials (such as nano-ceramic material), this work firstly constructs an experimental platform for workpiece ultrasonic vibration and ELID combined plane grinding according to the processing mechanism of ultrasonic vibration assisted grinding and ELID grinding; then, based on the removal mechanism of hard brittle material, this work analyzes the kinematics of single abrasive grit with workpiece ultrasonic vibration plane grinding, and studies the effect of ELID plane grinding on the grinding depth; finally, based on the above work, this work proposes the mathematical model of material removal rate for the workpiece ultrasonic vibration and ELID combined plane grinding. Experimental results show that the material removal rate of combined plane grinding increases with the increase of the cutting depth and workpiece speed, the material removal rate of ultrasonic vibration and ELID combined grinding is higher than that of ELID grinding under the same conditions.
Highlights
Nano-ceramic materials have many advantages, such as high hardness, high strength, high temperature resistance, strong wear resistance, strong corrosion resistance, good insulation, and good chemical stability and so on, and have been applied in many fields such as aerospace, materials engineering, electronic engineering, chemical engineering and mechanical engineering
When the grinding depth is 6 μm, the material removal rate of ELID plane grinding is reduced to only 0.025 %, and the material removal rate of ultrasonic vibration and ELID composite plane grinding keeps increasing up to 0.030 %
Based on the study of ultrasonic vibration grinding of single abrasive particle material removal volume and the characteristics of ultrasonic vibration and ELID composite plane grinding, considering the influence of ELID surface grinding on the grinding depth, the ultrasonic vibration and ELID composite plane grinding material removal models were established by the authors
Summary
Nano-ceramic materials have many advantages, such as high hardness, high strength, high temperature resistance, strong wear resistance, strong corrosion resistance, good insulation, and good chemical stability and so on, and have been applied in many fields such as aerospace, materials engineering, electronic engineering, chemical engineering and mechanical engineering. Nano-ceramic materials can be processed by the ultra-precision machining technology, the theoretical basis of research on ultra-precision machining of the hard and brittle material technology in China is relatively weak. The ultrasonic vibration precision grinding and ELID (electrolytic in-process dressing) mirror grinding technologies are relatively mature technologies to high precision mirror grinding for the hard and brittle materials because of its high processing efficiency and wide application range. This paper is structured as follows: Section 2 introduces the processing method of ultrasonic vibration and ELID composite plane grinding; Section 3 presents the material removal model of ultrasonic vibration and ELID composite plane grinding; Section 4 presents the experimental results; the conclusion of this work is presented
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