In the process of metallographic sample preparation, the pre-grinding of the sample is an indispensable previous process before polishing. After the sample is pre-polished, the efficacy of sample preparation can be greatly improved.
Metallographic pre-grinding machine is a wet-type polishing machine, which uses various water-resistant sandpaper with different particle sizes to polish various metal and its alloy samples. It is designed by investigating and collecting opinions from various aspects of users. The machine is equipped with a beautiful and practical ABS shell, using stainless steel standard parts, and the body will never rust, which greatly enhances the performance of the product. Make this machine the ideal equipment for sample pre-grinding.
Metallographic pre-grinding machine principle:
First, the clean water continuously flows into the rotating grinding disc through the water pipe. At this time, the sandpaper floating on the water surface is thrown out of the disc by the centrifugal force of the rotating grinding disc to form a vacuum. The atmospheric pressure will press the sandpaper tightly against the grinding disc. The pre-grinding work can be carried out when the rotation of the grinding disc stops, and the sandpaper can be removed freely at this time.
Using metallographic pre-grinding machine, in addition to mechanical polishing instead of manual operation to improve the efficiency of sample preparation, the plastic deformation and surface heating traces generated during the cutting of the sample can be completely removed for further microstructure determination after polishing. When the metallographic pre-grinding machine is working, water is continuously poured into the rotating grinding disc, and the water under the water-resistant sandpaper is thrown out of the disc due to the centrifugal force. The sandpaper can freely expand and contract under the pressure of the atmosphere. Therefore, there is no need to bond or clamp the sandpaper, and the use and replacement are very convenient.
Metallographic pre-grinding machine has single disc frequency conversion, dual disc dual speed single control, dual disc single control frequency conversion, dual disc dual control frequency conversion, dual disc dual speed and dual control, and automatic metallographic grinding and polishing machine. You should also pay attention to your choice. If your company does a lot of samples, you can choose a double-disc metallographic pre-grinding machine and a double-disc metallographic polishing machine. If there are not many samples, you can choose a metallographic grinding and polishing machine. Metallographic grinding and polishing machine is a combination of grinding and polishing.