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China Polishing Machine Manufacturers

    • 46 posts
    June 4, 2019 2:27 AM EDT

    At present, there are several polishing methods commonly used, and the specific ones are introduced by the China Polishing Machine manufacturer.

    1. Mechanical polishing is a polishing method that removes the polished convex portion by plastic deformation on the surface of the material to obtain a smooth surface. Generally, oil stone strips, wool wheels, sandpaper, etc. are used, which are mainly manual operations, and special parts such as the surface of the rotary body are used. An auxiliary tool such as a turntable can be used, and a method of super-fine polishing can be used with a high surface quality requirement. Ultra-fine grinding and polishing is a special-purpose grinding tool. In the polishing liquid containing abrasive, it is pressed against the machined surface to perform high-speed rotary motion. With this technology, a surface roughness of Ra of 0.008 μm can be achieved, which is among various polishing methods. This method is often used in optical lens molds.

    2. Chemical polishing is to allow the material to be preferentially dissolved in the slightly convex portion of the surface in the chemical medium 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. The surface roughness obtained by chemical polishing is generally several 10 μm.

    3. Ultrasonic polishing The workpiece is placed in the abrasive suspension and placed together in the ultrasonic field. The ultrasonic vibration is applied to the abrasive surface of the workpiece. 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 corrode the process, which is favorable for surface illuminating.

    4. 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 are: abrasive jet 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 (polymeric substance) which flows at a relatively low pressure and is doped with an abrasive, and the abrasive can be made of silicon carbide powder.

    5. 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.