Abrasive Flow Analysis Of Acoustic Levitation Polishing And Experimental Rasearch

Nanomechanical property is one of the important parameters to study of nanophase materials, components and structure. It has been become an important content of nanotechnology. The U.S. government report put forward three glory about nanotechnology has two closely linked with nano mechanics. Nano sample is the foundation of nano mechanical measurement. We can obtain nano mechanics parameters by nano indentation, scratch measurement.To prepare high quality nano mechanics sample, this paper adopt a new polishing method based on acoustic levitation. The tungsten steel surface roughness is8.99nm after acoustic levitation polishing, it had great improved coMPared with mechanical chemical polishing (40nm). This paper draws the following conclusion:1. This article design a set of acoustic levitation polishing device, which includes ultrasound generator, polishing container and workpiece installation fixture. And select the rectangular transducer array as ultrasonic transmitting terminal.2. According to acoustic levitation polishing device, the acoustic pressure in polishing tank is studied. Through Matlab numerical simulation, dyeing method and hydrophone method, we COMPared all kinds of free surface reflection end, rigid reflection end, sound suspension reflection end how to influence the pressure of polishing device. And the acoustic suspension polishing device is optimized. At the same time, Pressure research laid good foundation for further study of grinding grain movement.3. We observed grinding particle motion law by PIV, the results show grinding grain movement with the direction of the sound pressure equipotential line is roughly same, it also shows the maximum g velocity of grain is proportional to the ultrasound power.4. We optimized the acoustic suspension polishing processing technology by the different processing parameters of polishing. And through SEM, wyko contrast the sample produced by acoustic suspension polishing and mechanical chemical polishing. We found acoustic suspension polishing is a good way to produce nanometer sample.