Investigation On The Characteristics And Formation Mechanisms Of Grinding Force And Energy In High Efficiency Deep Grinding For Advanced Ceramics

Advanced ceramics are becoming popular materials in manufacture industry for their high performances such as hardness, high compressive strength, thermal and wear resistance. Grinding with diamond wheel has been widely used in the production of advanced ceramics components. However, nowadays ceramics are ground in low efficiency, high cost and the quality is difficult to control, due to its hard-to-cut characteristics. New advanced grinding methods are needed urgently to improve machining productivity and grinding surface integrality, so that advanced ceramics can be abroad used.The application of HEDG(High efficiency deep grinding) on the machining of ceramics is a creation to search new efficiency ways to grinding advanced ceramics components. This article try to research into the grinding mechanisms and feasibility of high efficiency deep grinding advanced ceramics by analyzing the characteristics and formation mechanisms of grinding force and grinding energy in the process. After summarizing the research theory and experiences, systemic experiments was done grinding ceramics including alumina and yttria partially stabilized zirconia under the high efficiency deep grinding condition. Grinding force in different grinding conditions—different wheel speed, different depth of cut or different feed rate were measured. The author discussed the effect of various parameters on grinding force, specific grinding energy, grinding force ratio was analyzed, and studied the indicated material removal modes and force formation mechanisms. Mathematics model of grinding force of high efficiency deep grinding ceramics was build. The paper also investigated the characteristics, formation and distribution mechanisms of specific grinding energy.The results indicated that grinding force per grit, specific grinding energy corresponding to the maximum undeformed chip thickness well, and the grinding force, grinding force ratio also have a good corresponding relation with the equivalent cutting thickness. PSZ and Al₂O₃ have different material removal mode and grinding performances due to their different mechanical properties. Under whichever material removal mode tangential force are mainly composed of rubbing force due to sliding and ductile plough between the grain and materials, and the cutting force component is very small. The mechanisms of sliding and ductile plough...