News

1. Mechanical polishing

Mechanical polishing is a polishing method that removes the protrusions on the surface of the workpiece by cutting or plastically deforming the surface of the material to obtain a smooth surface. Generally, whetstone strips, wool wheels, sandpaper, etc. are mainly used by manual operations, For the high surface quality requirements, the Ultra-fine polishing method can be used. Ultra-precision polishing adopts special abrasive tool. In the lapping and polishing liquid containing abrasive, it is tightly pressed on the machined surface of the workpiece for high-speed rotation. Using this technology, the surface roughness of Ra0.008 μm can be achieved, which is the best surface roughness among various polishing methods. Optical lens molds often use this method.

2. Chemical polishing

Chemical polishing is that the material in the chemical medium dissolves the microscopically protruding parts of the surface preferentially over the concave parts, thereby obtaining a smooth surface. This method can polish workpieces with complex shapes, and can polish many workpieces at the same time, with high efficiency. The surface roughness obtained by chemical polishing is generally Ra10 μm.

3. Electropolishing

The basic principle of electrolytic polishing is the same as that of chemical polishing, that is, by selectively dissolving the tiny protrusions on the surface of the material to make the surface smooth. Compared with chemical polishing, it can eliminate the influence of cathodic reaction, and the effect is better.

4. Ultrasonic polishing

Ultrasonic polishing is a processing method that uses the workpiece section to make ultrasonic vibration and polishes brittle and hard materials through abrasive suspension. 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 oscillation of the ultrasonic wave.

5. Fluid polishing

Fluid polishing relies on the flowing liquid and the abrasive particles carried by it to wash the surface of the workpiece to achieve the purpose of polishing. Hydrodynamic grinding is driven by hydraulic pressure. The medium is mainly made of special compounds (polymer-like substances) with good flowability under low pressure and mixed with abrasives. The abrasives can be silicon carbide powder.

6. Magnetic grinding and polishing

Magnetic grinding and polishing is to use magnetic abrasives to form abrasive brushes under the action of a magnetic field to grind workpieces. This method has high processing efficiency, good quality and easy control of processing conditions. .

7. EDM ultrasonic composite polishing

In order to improve the polishing speed of workpieces with surface roughness Ra of 1.6 μm or more, ultrasonic and special high-frequency, narrow-pulse, and high-peak current pulse power sources are used for composite polishing. its surface roughness.