The surface polishing of metal materials is the first step in electroplating and has important significance. The surface of the metal raw material is rough and streaked. If it is not polished, the plating will give people a very uncomfortable feeling. As a decorative top lamp, the crystal lamp also loses its noble meaning.
Polishing (also called grinding), generally choose the sanding and grinding steps for the roughness of the material and the quality requirements of the workpiece. If the material is too rough, it should be prevented before the raw materials are put into storage, because the surface of the metal material is damaged or bumped. Polishing will also be powerless. The role of polishing is to make the smooth metal surface into a fine light, which makes the plating better and is a necessary step before plating.
It is a bit difficult for outsiders to identify the finished lamps through the surface of the plating.
Identification method: eyes.
Identification difficulty: more difficult.
Identification method: observe the surface of the metal material through the plating surface. 1. If the metal material has obvious streaks, it means that it has not been polished; 2. If it is a strange feeling, it means that the polishing is only rough and over the sand; 3. If the plane is used as a mirror, and the image has no streaks , indicating excellent polishing. The stronger the mirror feel, the better the polishing; the stronger the streaks, the more foggy it is, indicating the rougher the polishing.
Generally, the iron metal parts of the electroplating materials are first opened with 240 sand, then 260 sand, and then 280 sand. The high requirements are 320 sand, yellow wax and purple wax are used as auxiliary materials. The role of sanding is to make the metal surface More and more meticulous, after the sand is finished, the hemp wheel is required, and the high-quality cloth wheel is required. After these processes, the polishing is generally bright and bright.
The polishing of copper is more strict, and if the quality requirements are high, it is necessary to follow the white cloth wheel and use the green wax at the same time. The effect of the shot can reach 2 meters and it looks like gold plating.
Polishing this step, there are many places that affect the quality, the imported sand and domestic sand, the use of wax, the skill level of the workers, and the qualification of the workers in each process.
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