How to polish and polish metal?

I believe many people know what metal is. Metal is a magnetic substance formed in nature. There are many kinds of this substance. Some metals can be used to make furniture products, and some metals can be used to make jewelry. Most metals need to be polished when they are processed. When metal is polished, professional polishing instruments and equipment are generally used. Do you know the purpose of metal polishing equipment? Now Bian Xiao will give you a detailed introduction.

Metal grinding and polishing technology

1. mechanical polishing

Mechanical polishing is a polishing method to obtain a smooth surface by cutting and plastic deformation of the material surface. Generally, it is oilstone strips, wool wheels, sandpaper, etc. Both are adopted, and manual operation is the main method. For special parts such as the surface of rotating body, auxiliary tools such as turntable can be used, and ultra-precision grinding and polishing method can be used for those with high surface quality requirements. Ultra-precision grinding and polishing is a kind of special grinding tool, which is pressed tightly on the machined surface of the workpiece in grinding polishing solution containing abrasive and makes high-speed rotating motion. This technology can reach the surface roughness of Ra0.008μm, which is the highest among all kinds of polishing methods. This method is often used in optical lens molds.

2.？ Chemical polishing?

Chemical polishing is to make the micro-convex part of the material surface dissolve before the concave part in the chemical medium, so as to obtain a smooth surface. The main advantages of this method are that it does not need complicated equipment, can polish workpieces with complicated shapes, can polish multiple workpieces at the same time, and has high efficiency. The core problem of chemical polishing is the preparation of polishing solution. The surface roughness obtained by chemical polishing is generally 65438±00 μm m. ..

3.？ Electrolytic polishing?

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, the surface is smooth. Compared with chemical polishing, it can eliminate the influence of cathode reaction and has better effect. The electrochemical polishing process is divided into two steps: (1) macro leveling? When the dissolved product diffuses into the electrolyte, the geometric roughness of the material surface decreases, Ra >: 1μm .(2) Weak light flatness? Keywords anodic polarization, surface brightness improvement, ra

4.？ Ultrasonic polishing

Put the workpiece into the abrasive suspension and put it into the ultrasonic field together, and polish the abrasive on the surface of the workpiece through the oscillation of ultrasonic waves. Ultrasonic machining has small macroscopic force and will not cause workpiece deformation, but it is difficult to make and install the tooling. Ultrasonic machining can be combined with chemical or electrochemical methods. On the basis of solution corrosion and electrolysis, ultrasonic vibration is applied to stir the solution, so that the dissolved products on the surface of the workpiece are separated and the corrosion or electrolyte near the surface is uniform; The cavitation of ultrasonic wave in liquid can also inhibit the corrosion process, which is beneficial to surface whitening.

5.？ Fluid polishing? Fluid polishing is based on the high-speed flowing liquid and its abrasive particles scouring the surface of the workpiece to achieve the purpose of polishing. Commonly used methods include abrasive jet machining, liquid jet machining and hydrodynamic grinding. Hydrodynamic grinding is driven by hydraulic pressure, which makes the liquid medium carrying abrasive particles flow over the surface of the workpiece at high speed. The medium is mainly composed of a special compound with good fluidity under low pressure and an abrasive, which can be silicon carbide powder.

6.？ Magnetic abrasive polishing? Magnetic abrasive polishing is to use magnetic abrasive to form grinding brush under the action of magnetic field to grind the workpiece. This method has the advantages of high processing efficiency, good quality, easy control of processing conditions and good working conditions. With proper abrasive, the surface roughness can reach Ra 0. 1 micron. ..

Most metals will have a good effect after grinding and polishing. Metal grinding and polishing can make the metal surface smoother and more beautiful. Most furniture products and jewelry metals are processed and polished before they are put on the market. Instruments and equipment used for polishing and polishing metals have many different working principles. When we choose different machinery and equipment, we should proceed from its principle. There are also many manufacturers of metal grinding and polishing machinery. You can choose the manufacturer according to the type.

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