Introduction to the most comprehensive polishing methods for ceramic processing

When the ceramic plane is processed to a certain finish, the surface will be particularly smooth and beautiful, just like a mirror. Some ceramic plates and rods made of zirconia ceramics can be polished to a great finish. The following Kezhong Ceramics Factory will introduce the most comprehensive polishing method for everyone.

Common polishing methods and working principles

1. Mechanical polishing

Mechanical polishing is a polishing method to get a smooth surface by cutting or plastically deforming the material surface. Generally, oilstone strips, wool wheels, sandpaper, etc. are used, and manual operation is the main method. If the surface quality is high, the ultra-precision grinding and polishing method can be used. Ultra-precision grinding and polishing is to use a special abrasive tool, which is pressed tightly on the machined surface of the workpiece in the grinding and polishing liquid containing abrasive, and makes a high-speed rotating motion. Ra0.008 μ The surface roughness of m is the best among all kinds of polishing methods. This method is often used in optical lens molds. Mechanical polishing is the main method of mold polishing.

2. Chemical polishing

Chemical polishing is to make the micro-protruding parts of the surface dissolve preferentially over the concave parts in the chemical medium, so as to obtain a smooth surface. This method can polish workpieces with complex shapes and many workpieces at the same time, with high efficiency. The surface roughness obtained by chemical polishing is generally Ra10 μ m。

3. Electrolytic polishing

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

4. Ultrasonic polishing

Ultrasonic polishing is a processing method of polishing brittle and hard materials through abrasive suspension by ultrasonic vibration of tool section. Put the workpiece into the abrasive suspension and put it in the ultrasonic field together, and grind and polish the abrasive on the surface of the workpiece by the oscillation of the ultrasonic wave. Ultrasonic machining has small macroscopic force and will not cause workpiece deformation, but it is difficult to make and install the tooling.

5. Fluid polishing

Fluid polishing relies on flowing liquid and its abrasive particles to scour the surface of workpiece to achieve the purpose of polishing. Hydrodynamic grinding is driven by hydraulic pressure, and the medium is mainly made of special compounds (polymer-like substances) with good fluidity at low pressure and mixed with abrasives, which can be silicon carbide powder.

6. Magnetic grinding and polishing

Magnetic abrasive polishing is to use magnetic abrasive to form abrasive brush under the action of magnetic field to grind the workpiece. This method has high processing efficiency, good quality and easy control of processing conditions. With proper abrasive, the surface roughness can reach Ra0.1 μ m。

7. Electro-spark ultrasonic composite polishing

In order to improve the surface roughness Ra to 1.6 μ The polishing speed of workpieces above m is compounded by ultrasonic wave and special pulse power supply with high-frequency narrow pulse and high-peak current. Ultrasonic vibration and electric pulse corrosion act on the surface of workpieces at the same time, which quickly reduces the surface roughness. This is very effective for polishing the rough surface of dies processed by turning, milling, EDM and wire cutting.

Website: https://www.zhengtaifeng.com/