Magnetically-polishing machine and process

A process for magnetically-polishing an article by means of a magnetically-polishing machine, the machine comprising a high-speed rotatable magnet disc the top surface of which is divided by at least one diameter through the magnet disc into alternating south-polar zones and north-polar zones, a fixed plate made of a nonmagnetic material and provided above the magnet disc, a hollow cylindrical polishing vessel retainer provided above the fixed plate and including an elastic body made of a nonmagnetic material, the elastic body lining the inner cylindrical surface of the polishing vessel retainer, at least one polishing vessel made of a non magnetic material and removably retained in the polishing vessel retainer, and means for preventing the polishing vessel from rotating, the process comprising

• placing in the polishing vessel at least one article to be polished, an abrasive in the form of pieces of a magnetic metal having dimensions of at least 0.2 mm and a liquid polishing assistant with a small amount of a surfactant;
• then
• fastening the polishing vessel;
• and then
• agitating the abrasive without translationally moving the abrasive by rotating the magnetic disc at high speed.

A process for magnetically-polishing a high-speed rotatably magnetic disc the top surface of which is divided by at least one diameter through the magnet disc into alternating south-polar zones and north-polar zones, a fixed plate made of a nonmagnetic material and provide above the magnet disc, a hollow cylindrical polishing vessel retainer provided above the fixed plate and including an elastic body mad of a nonmagnetic material, the elastic body lining the inner cylindrical surface of the polishing vessel retainer, at least one polishing vessel made of a nonmagnetic material and removably retained in the polishing vessel retainer, and means for preventing the polishing vessel from rotating, the process comprising

• placing in the polishing vessel at least one article to be polished, an abrasive in the form of pieces of a nonmagnetic metal having dimensions of at least 0.5 mm, a magnet agitator having a dimension of about 1 cm and a liquid polishing assistant with a small amount of a surfactant;
• then
• fastening the polishing vessel;
• and then
• agitating the abrasive without translationally moving the abrasive by rotating the magnet disc at high speed.