The Effect Of Ultrasonic Vibration On The Grinding Performance Of Grinding Wheel

Advanced structural ceramics materials owns a lot of superior properties, such as high strength atelevated temperature, high wear resistance, high hardness, anti-corrosion and low thermalconductivity. However, their widespread utilizations of advanced structural ceramics are constrainedby high-cost and time-consuming machining process. Rotary ultrasonic machining is suitable formachining of hard and brittle materials and considered to be one of cost-effective machining methodsfor advanced structural ceramics materials due to its hybrid machining process that combines thematerial removal mechanisms of diamond grinding and ultrasonic machining. But, the application ofrotary ultrasonic machining is constrained due to the mechanisms of rotary ultrasonic machining isnot very clear. So, research works on rotary ultrasonic machining is going to be very important.In this paper, based on the achievements about rotary ultrasonic machining at home and abroad,experiments were conducted to study the effect of ultrasonic vibration on the performance of grindingwheel when the angle between the direction of ultrasonic vibration and the processing surface normalis different. The main research works were completed as follows:(1) Experiments on grinding SiC ceramics with ultrasonic vibration were conducted when theangle between the direction of ultrasonic vibration and the processing surface normal is0°and90°，and compared with conventional grinding under the same processing parameters conditions. Theresults about the effect of ultrasonic vibration on grinding force, surface roughness and surfacemorphology were got.(2) The single factor test of rotary ultrasonic grinding were conducted when the angle betweenthe direction of ultrasonic vibration and the processing surface normal is0°and90°, and comparedwith conventional grinding under the same processing parameters conditions. The relationshipbetween processing parameters (spindle speed, feed rate and grinding depth) and the grinding force,surface roughness were got.(3) The topographic of grinding wheel with ultrasonic vibration was observe by using3D videomicroscopy when the angle between the direction of ultrasonic vibration and the processing surfacenormal is0°and90°, and compared with the topographic of grinding wheel without ultrasonicvibration under the same processing parameters conditions. Results about the effects of ultrasonic vibration on the wear styles of abrasive when the angle between the direction of ultrasonic vibrationand the processing surface normal is0°and90°were got.