Six major abrasive polishing methods

Metal six abrasive abrasive polishing method. When it comes to abrasives, many people know that abrasives include silicon carbide (SIC), alumina (A/O), zirconium corundum (ZA), ceramic abrasives (CER), and mixed abrasives. Abrasives are further divided into sandblasting materials, wire drawing materials, grinding materials, polishing materials, and abrasive materials. What are the methods for polishing in polishing materials?

The six polishing methods for abrasive tools are as follows:

1 Ultrasonic polishing: The workpiece is placed in the abrasive suspension and placed together in the ultrasonic field, and the abrasive is ground and polished on the surface of the workpiece by the action of ultrasonic vibration. Ultrasonic machining has a small macroscopic force and does not cause deformation of the workpiece, but it is difficult to manufacture and install the tooling. Ultrasonic processing can be combined with chemical or electrochemical methods. On the basis of solution corrosion and electrolysis, the ultrasonic vibration stirring solution is applied to dissociate the dissolved products on the surface of the workpiece, and the corrosion or electrolyte near the surface is uniform; the cavitation of the ultrasonic wave in the liquid can also inhibit the corrosion process, which is favorable for surface illuminating.

2 Fluid polishing: Fluid polishing relies on high-speed flowing liquid and abrasive particles carried by it to wash the surface of the workpiece for polishing. Common methods include: abrasive silicon carbide injection processing, liquid jet processing, hydrodynamic grinding, and the like. The hydrodynamic grinding is hydraulically driven to cause the liquid medium carrying the abrasive particles to flow back and forth across the surface of the workpiece at high speed. The medium is mainly made of a special compound which flows at a lower pressure and is doped with an abrasive. The abrasive can be a silicon carbide powder of an abrasive material.

3 Magnetic grinding and polishing: Magnetic grinding and polishing is the use of magnetic abrasive to form an abrasive brush under the action of a magnetic field to grind the workpiece. This method has high processing efficiency, good quality, easy control of processing conditions and good working conditions. With a suitable abrasive, the surface roughness can reach Ra 0.1 μm.

4 Mechanical polishing: Mechanical polishing is a polishing method that removes the polished convex portion by plastic deformation of the surface of the cutting material to obtain a smooth surface. Generally, oil stone strips, wool wheels, sandpaper, abrasive belts, nylon wheels, etc. are used, and manual operation is mainly used. For special parts such as the surface of the rotary body, auxiliary tools such as a turntable can be used, and the method of super-fine polishing can be used for high surface quality requirements. Ultra-fine grinding and polishing is a special grinding tool made of abrasive. In the polishing liquid containing abrasive, it is pressed against the machined surface to perform high-speed rotary motion. It is the highest of all polishing methods. This method is often used in optical lens molds.

5 Chemical polishing: Chemical polishing is to make the material in the chemical medium, the microscopically convex part of the surface is preferentially dissolved, so as to obtain a smooth surface. The main advantage of this method is that it can polish a workpiece with complex shapes without complicated equipment, and can polish many workpieces at the same time with high efficiency. The core issue of chemical polishing is the formulation of the polishing fluid.

6 Electropolishing: The basic principle of electropolishing is the same as chemical polishing, that is, it selectively dissolves the surface of the material to make the surface smooth. Compared with chemical polishing, the effect of the cathode reaction can be eliminated, and the effect is good. The electrochemical polishing process is divided into macro leveling and micro leveling.

Metal polishing is divided into polishing and surface polishing in the mold. Strictly speaking, polishing the metal surface with abrasive abrasives is called mirror processing. This surface treatment has high requirements and the surface must be A certain standard of flatness, smoothness and precision. The mirror processing of precision molds is mainly based on mechanical polishing. Surface polishing generally requires only a shiny surface.