The six polishing methods for abrasive tools are as follows:
1. 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, which are manually operated. For the main parts, 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 grinding can be used for the surface quality. 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.
2, chemical polishing: chemical polishing is to make the material in the chemical medium surface microscopic convex part of the concave part 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.
3. Electrolytic polishing: The basic principle of electropolishing is the same as chemical polishing, that is, the surface of the material is selectively fused to make the surface smooth. Compared with chemical polishing, the effect of the cathode reaction can be eliminated, and the effect is better. The electrochemical polishing process is divided into macro leveling and micro leveling.
4. Ultrasonic polishing: The workpiece is placed in the abrasive suspension and placed in the ultrasonic field together, and the abrasive is ground and polished on the surface of the workpiece by the vibration of the ultrasonic wave. 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, ultrasonic vibration is applied to stir the solution 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 and facilitate surface illuminating.
5. Fluid polishing: Fluid polishing relies on high-speed flowing liquid and abrasive particles carried by it to wash the surface of the workpiece to achieve polishing. Common methods include: abrasive silicon carbide injection processing, liquid jet processing, hydrodynamic grinding, and the like. Hydrodynamic grinding is driven hydraulically to allow 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 relatively low pressure and is doped with an abrasive. The abrasive can be a silicon carbide powder of an abrasive material.
6. Magnetic Abrasive Polishing: Magnetic Abrasive 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.
The polishing described in plastic mold processing is very different from the surface polishing required in other industries. Strictly speaking, abrasive polishing with abrasives should be called mirror processing. Not only does it have high requirements for polishing itself, but it also has a high standard for surface flatness, smoothness and geometric accuracy. Surface polishing generally requires only a shiny surface. The mirror processing of precision molds is mainly based on mechanical polishing.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
Weld Mesh,Galvanized Welded Wire Mesh,Stainless Steel Wire Mesh Panels,Heavy Gauge Wire Mesh
ANPING HONGYU WIREMESH CO.,LTD , https://www.hongyu-wiremesh.com