Research And Application On Internal Surface Of Ceramic Tube By The Ultra-precision Grinding Technology

With the rise of the new technological revolution, functional ceramics are more and more attention around the world, variety increasing, more widely applications. They are widely application of the industrial, aerospace, military and other fields. When the ceramic tube is used as a high-precision parts precision flowmeter, if the uneven surface of the ceramic tube can cause fluid or gas in the uneven ceramic tube internal pressure and flow rate caused by the surging phenomenon. So that the meter is not working smoothly in turn affecting the accuracy of measurement results. It is very important for ultra-precision polishing inner surface of ceramic tube.In this paper, based on the principle of magnetic abrasive finishing. Through the analysis the magnetic abrasive grains of the force and movement in the process. Obtaining two parameters affect the grinding quality,the moving speed of the grinding abrasive and pressure. Magnetic abrasive material removal mechanism is analyzed, obtaining the effect of chemical polishing, oxidation, corrosion and mechanical friction work together, because the removal of workpiece of the frontal three levels is extremely small, therefore, during the grinding process mechanical friction plays a major role. Basing on reading a lot of literature, independently inventing a device to polish the inner surface of the non-conducting magnetic straight tube such as ceramic tube and so on. By ANSYS software simulation analysis, comparing with analysis of the distribution of the magnetic field lines and magnetic field intensity. During the grinding process,adding V-shaped magnet as auxiliary abrasive tool to make magnetic field strength increasing finally, optimum magnetic circuit is obtained,grinding efficiency is improved.By adjusting the grinding space of magnetic device between the outer pole and the workpiece and the distance between the two axial limit photoelectric switch to polishing the entire inner surface of the ceramic tube. In this paper respectively, iron particle size, diamond particle size the amount of slurry and other parameters on the inner surface of the ceramic tube grinding test, the best process parameters are obtained finally. The experience verified that it is feasibility to use magnetic abrasive finishing polishing the inner surface of the ceramic tube.In order to enhancing processing efficiency of polishing the inner surface of the tube. Proposing to add axial vibration of mixed abrasive during the magnetic abrasive finishing process, so that the trajectory of the mixed abrasive particles is more complicated with the workpiece. Therefore, when polishing the inner surface of the ceramic tube increasing the vibration assisting devie is proposed. And by experimental verification of the optimum amplitude and the vibration frequency during the grinding process. Eventually, through contrasting vibration assisted magnetic and ordinary magnetic abrasive grinding proved vibration assisted magnetic abrasive can well improve the polishing efficiency of the inner surface of ceramic tube and the polishing efficiency can be doubled.