What Is a Magnetic Polisher?
A magnetic polisher is a device that uses magnetic force to polish the surface of an object.
Magnetized abrasive particles are moved by the force of a magnet applied from the backside of the sample. By rotating the magnet at high speed, the abrasive particles hit the surface irregularities at high speed, enabling uniform polishing.
It is also possible to polish in places that are inaccessible or in microscopic positions that are difficult to process with ordinary polishing machines.
Abrasive particles are forced into vigorous motion in the liquid, creating complex water volumes. It is suitable for polishing because it can penetrate into fine surfaces.
Uses of Magnetic Polishers
Magnetic polishers are used to polish complex objects. Since the polishing is done by using magnetic force to cause a liquid containing abrasive particles to move at high speed, even complex structural parts and minute surfaces can be smoothed out.
It is very difficult to polish narrow parts with a general polisher, but it is possible with a magnetic polisher. Specifically, it is used in the following cases:
- Deburring process
- Rust removal from metals
- Removal of oxide film
- Glossy surfaces
This is one of the polishing machines that are utilized in various places because it can polish with high precision regardless of its shape.
Principles of Magnetic Polishers
Magnetic polishers use the motion caused by magnetic force to polish objects.
First, the container is filled with magnetic particles which are the abrasive media, the solution that moves them, and the object to be polished.
Next, the magnet installed below is rotated. Rotating the magnet at high speed causes the N and S poles to switch, which in turn causes the magnetic particles in the container to move. In this high-speed changing magnetic field, the magnet causes a complex flow in the liquid, which scrapes the surface of the object to be polished.
The abrasive media moves at high speed, but its motion is erratic and it strikes the object to be polished from various directions. This is repeated thousands or tens of thousands of times to achieve smooth polishing. In addition, since the solution containing the polishing media can penetrate even narrow areas that cannot be reached by the polishing machine, it is possible to polish even finer areas.