Papers by Keyword: Velocity Equation

Abstract: Added a magnetic field whose direction is parallel to the electrical field’s directions, the charged particles between two electrodes can move in spirals in magnetic-electrochemical compound polishing, and then the condition of chemical reaction is improved. The efficiency and quality of polishing can be promoted consequently. If the direction of magnetic field is changed alternative, the effect of polishing can be improved more clearly. In the paper, a new magnetic-electrochemical compound polishing tool is developed. The tool can be fixed on spindle of CNC easily. The tool is flexible, so it can make the polishing head and workpiece touch evenly each other. Because the head of magnetic-electrochemical compound polishing tool is a series, the head can be replaced conveniently according to different surface. Particularly, the tool can set a magnetic field whose direction is parallel to the electrical field’s direction. The tool can change strength of the magnetic field easily. At last, the tool is tested and its function is perfect.

Abstract: In magnetic-electrochemical compound polishing, adding a magnetic field whose direction is parrallel to the electrical field’s directions and is charged alternatively, the velocity of changed particles cannot be accelerated obviously and the efficiency of chemical reaction cannot be promoted consequently, but the chemical reaction is well-distributed and the effect of the polishing is improved. In the paper, the velocity equation and loci equation of the charged particle in electromagnetic feild is concluded and analysed in magnetic-electrochemical compoud poshing in which an alternative direction’s magentic field is added. To be compared the charged particles in alternative direction’s magnetic field with the charged particles in static magnetic field carefully, the conclusion above is obtained. Moreover, a magnetic-electrochemical compound polishing head which can change the magnetic field’s direction easily is developed. At last, the conclusion is tested.

Abstract: Traditionally, the magnetic field is always vertical to the electrical field in a magnetic-electrochemical compound polishing.The magnetic field is set to parallel the electrical field in this paper. The mathematical model of the charged particles movement in a magnetic field is established through the analysis of its movement process when using Coulomb laws and Lorentz force. Through constructing the velocity formulation and loci formulation, the function of the magnetic field is proved. Because of the magnetic field, the concentration polarization of electrochemical reaction can be reduced more and the electrochemical reaction can be accelerated easily than the traditional polishing in which the magnetic field is vertical to the electrical field. Finally, to verify the model, the magnetic-electrochemical compound polishing process has been tested and the results, compared with those obtained from the model, have shown the movement model is reasonable and the analysis to function of magnetic field is correct.

Abstract: Magnetic-electrochemical compound polishing is applied in difficult-to-process materials little by little. The influence of the magnetic field to electrochemical process is very complicated. In the paper, using Coulomb laws and Lorentz force, the two kinds of math model of the movement of the charged particles are established according to the different magnetic field whose direction is vertical or parallel to the electrical field. The velocity equations and loci equations of three typical particles are concluded in two kinds of magnetic field’s directions. To be compared and analyzed carefully, the influence of the magnetic field’s direction to polishing is concluded. This study can guide how to determine the magnetic field’s direction in magnetic-electrochemical compound polishing, and build the theoretical basis to study the mechanism of magnetic-electrochemical compound polishing.

Abstract: With widely using difficult-to-process materials, such as the stainless steel and SnSb alloy, the magnetic-electrochemical compound polishing process has been paid much more attention by some Japanese and Chinese researchers. In the paper, the math model of the movement of the charged particles in a magnetic field is established through the analysis of its movement process, using Coulomb laws and Lorentz force. The velocity equations and loci equations are concluded, and the movements of there typical particles are compared carefully and analyzed. Therefore, the function of the magnetic field is drawn. In the end, to verify the model, the magnetic- electrochemical compound polishing process were tested and the results were compared with those obtained from the model, the results showed the movement model was reasonable and the analyzing to function of magnetic field was correct.