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What are the precautions for using a metallographic polishing machine?
Release Date:
2021-11-20
The metallographic grinding and polishing machine is a high-end polishing device that requires only the setting of parameters and then automatic polishing. For users who are new to this type of equipment, some operational procedures may not yet be fully mastered, and certain issues require careful attention.
The following precautions should be observed when using the metallographic polishing machine:
1. Ensure unobstructed drainage to prevent excess water in the internal cavity from overflowing onto the inner walls and entering the equipment, thereby damaging other components.
2. Press the Stop button to halt operation, then press the Start button; the device will resume at the speed it was running at before stopping.
3. The parameters for the grinding and polishing station can be set at any time; the parameters for the grinding and polishing heads must be configured as backups.
4. The rotating water nozzle must be removed before pressing the stop and start buttons; otherwise, interference will occur.
5. When beginning the rough grinding of the specimen, the pressure and rotational speed should be appropriately reduced, and the grinding time should be extended.
During polishing with a metallographic grinding and polishing machine:
1. Do not apply excessive polishing pressure to avoid tearing the flocked fabric; ensure the fabric is held close to the grinding disc. If the fabric comes loose or the clamping mechanism becomes jammed, immediately press the stop button to halt the machine.
2. When the machine’s plastic components operate at temperatures below -10°C, special care must be taken to prevent damage.
3. If any abnormal noises are detected, the machine should be stopped immediately for inspection.
4. Equipment should be properly maintained after each operation.
It should also be noted that damaged metallographic sandpaper and polishing cloths must not be used. Otherwise, the specimen and the grinding disc may be damaged during the grinding and polishing processes.
Metallographic grinding and polishing analysis is a straightforward method widely used for the qualitative and quantitative assessment of inclusions. It involves comparing inclusion characteristics with those observed under a metallographic microscope or performing quantitative calculations to determine the inclusion content, as well as their type, morphology, hardness, and other properties, while also characterizing their size and distribution. These factors are closely related to the steel’s manufacturing process and mechanical properties.
In the preparation of metallographic specimens, polishing and buffing are two critically important steps, typically carried out using metallographic pre-polishing machines and metallographic polishing machines. To meet the needs of China’s industrial and technological development and to align with users’ operational requirements, these machines are equipped with variable-frequency stepless-speed-control motors. They feature a modern, aesthetically pleasing design, exceptional durability, and extremely convenient maintenance. During operation, simply by changing the grinding or polishing discs, the machine can perform a wide range of processes, including rough grinding, fine grinding, dry grinding, wet grinding, and polishing, for various types of samples. To broaden the scope of sample preparation, the effective working surface can be increased by 20–30%, thereby enhancing both the quality of grinding and polishing and overall preparation efficiency. The machine operates smoothly with low noise, making it an ideal, fully functional piece of equipment for metallographic specimen preparation. It is powered by a variable-frequency stepless-speed-control motor. The machine boasts a sleek, attractive appearance, long service life, and easy maintenance. Users can readily switch between grinding and polishing discs to carry out rough grinding, fine grinding, dry grinding, wet grinding, and polishing on a variety of samples.
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