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Four new forms of electrolytic grinding


Speed ​​steel, tool steel, stainless steel. Taijin iron titanium, titanium Taijin, aluminum nickel-cobalt alloy,[link widoczny dla zalogowanych], iron, alumina magnetic alloy, carbide and more. Third,[link widoczny dla zalogowanych], the so-called magnetic field electrolytic electrolytic grinding grinding, referring to the workers in the electrolysis process of grinding l spider, in the anode (workpiece) and cathode (wheel) with the gap between the magnetic field in the processing carried out process. Principle of electrolytic processing of the magnetic field grinding shown in Figure 3. Figure 3 Principle of the magnetic field in the electrolytic electrolytic grinding grinding, in the electrode gap with magnetic field inside the post. Can promote the process, so that the anode (workpiece) surface of the dissolution process becomes strong, thereby increasing the electrolysis Don cut the ablation rate, the processing efficiency can be improved. The electrode gap with magnetic field, magnetic field moving charged particles will have an effect, so that the migration of substances faster. Within the magnetic fluid in the electrolyte stirring effect will be produced, for ~ ~ a possession of the enhanced electrolytic mobility, speed up the rate of electrochemical reaction. In addition, the magnetic field also affects the diffusion of the electrolyte, the electrode interface thinner diffusion layer, the electrochemical reaction process is conducive to fast. Can be seen in the electrolytic grinding process, coupled with magnetic field, due to the acceleration of the electrochemical reaction, the processing efficiency will be improved. However, the experimental results show that only in the use of conductive diamond or silicon carbide abrasive wheels abrasive wheels conducting the case, adding the magnetic field will produce the effect, and when using the conductive aluminum wheels, adding a magnetic field will not produce the effect,[link widoczny dla zalogowanych], which is due to high anti-magnetic properties of alumina caused. . Fourth, reverse electrolysis electrode grinding commonly used in industrial production in electrolytic grinding method is the workpiece as the anode, the positive DC power connection, and the conductive grinding wheel as the cathode, then the negative DC power supply. University of Tokyo T. Nakagwa do the opposite, developed a novel electrolytic grinding method, the processing principle shown in Figure 4. In the process,[link widoczny dla zalogowanych], the conductive electrode wheel for 4 laps principle of reverse electrolysis grinding anode and cathode DC power connection, business to the workpiece as the cathode, then the negative DC power supply. Conductive fibers as a binder with cast iron wheels. In the electrolytic grinding process, by adjusting the parameters of electrolysis, the use of electrolysis to dissolve the role of the working surface of the cast iron wheel conductive fiber binder, and can continue to clear the obstruction out of grinding wheel surface, so that part is always the work of grinding wheel sharp state. Processed using the method, the workpiece can be achieved only through a mirror finish process. This method can not only piece of metal materials for processing, but also on non-metallic materials, such as the inverted silicon, ceramics and other processing. Shows the adaptability of the process than the much broader general electrolytic grinding method. The method of grinding carbide alumina workpiece, when the feed volume reached 200 meters, time, clogging wheel has not yet appeared, but the ordinary grinding method, the feed of 130 m / time-sharing, there have been blocked wheel phenomenon, the process can not continue. Reverse electrolysis electrode surface finish grinding can achieve high grinding of glass, the use of feed 180 m / time-sharing, the surface roughness Rmax = O. 11 microns, lower feed after, Rmax = 0. O2 ~ O. 06 Emblem meters. High-speed steel, tool steel and stainless steel processing, the 8 trips grinding, the workpiece can be achieved by the surface roughness Rmax = 0.42 μm. Reference to the text section [1] qz ~ - Lang, efficient mechanical, electrical, chemical processing and grinding of a composite instance, Tian Yongyao translation,[link widoczny dla zalogowanych], processing power [2] Journal of the Mechanical Technology, 1979, No, 2. [3] ElectrochemicalGrindingWithMa. gneticFiled, 1979,27, No. I. * Technology Wei-new single-chamber pacemaker patients according to the U.S. Journal were born just 8 days, weight 2 pounds of Ni content with congenital block of rooms to children in vivo. Pacemaker implantation in the body of such a small baby, this is the first time in the world. Pacemaker using the emblem of such electronic circuit technology, the greatly reduced volume. Two-way telemetry system to facilitate non-invasive procedures and monitoring box, including a lithium iodine pacemaker batteries, electronic circuits and right ventricular lead and so on. Also has the use of programmable pacing, polarization sensitive, high output voltage (4 ~ 7.SV), no damage regulation and so on. (Yuan Qiming)
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