Mechanical polishing is a polishing process that removes the polished convex parts by cutting and plastic deformation of the material surface to obtain a smooth surface. The processing materials are usually whetstone strips, wool wheels, and sandpaper, which are mostly manual operations. Special parts such as The surface of the revolving body can be polished by auxiliary tools such as a turntable. If the surface quality is very high, the ultra-finishing polishing method can be used. Superfinishing and polishing is to use a special abrasive tool, which is pressed on the surface of the
304 stainless steel workpiece to be machined in a polishing liquid containing abrasives for high-speed rotating motion.
Chemical polishing is to make the microscopic protruding part of the 304 stainless steel surface dissolve first in the chemical medium than the concave part, so as to obtain a smooth surface. The advantage of this method is that it can polish workpieces with complex shapes without using complex equipment, and can polish many workpieces at the same time, and the work efficiency is very high. The key to this approach is the preparation of the polishing liquid.
As for
electrolytic polishing, its principle is similar to chemical polishing, which relies on selectively dissolving tiny protrusions on the surface of the material to make the surface of the stainless steel plate smooth. Compared with chemical polishing, this method can eliminate the influence of cathode reaction, and the effect is relatively good.
The
electrochemical polishing process can be divided into two steps. The first is macro leveling, the dissolved products diffuse into the electrolyte, and the geometric roughness of the material surface is reduced, and the second is micro-level leveling and anodic polarization, and the surface brightness is improved.
The
ultrasonic polishing is to put the 304 stainless steel workpiece into the abrasive suspension and place it in the ultrasonic field at the same time, relying on the oscillation effect of the ultrasonic wave, so that the abrasive is ground and polished on the surface of the 304 stainless steel workpiece. The macroscopic force of ultrasonic processing is small, and it will not cause deformation of the workpiece, but it is difficult to make and install the tooling. Ultrasonic machining can be combined with chemical or electrochemical methods.
The last type is
fluid polishing, which relies on high-speed flowing liquid and the abrasive particles carried by it to wash the surface of the workpiece to achieve the purpose of polishing. Commonly used methods include abrasive jet machining, liquid jet machining, and hydrodynamic grinding. Hydrodynamic grinding is driven by hydraulic pressure, so that the liquid medium carrying abrasive particles flows reciprocatingly through the surface of 304 stainless steel workpiece at high speed.
