What are the methods of magnetizing strong neodymium magnet?

     The magnetization of neodymium magnets is an operation of placing the electroplated magnet semi-finished product into the magnetic field formed by the coil to magnetize them and turn them into real permanent neodymium magnets.

     Generally speaking, NdFeB magnets are not magnetic in the early stages of production. Magnets are made from rare earth elements such as neodymium, which are mined, melted, ground, pressed and sintered before their magnetic energy is activated.During the pressing process, the particles in the magnet align, giving them a designated direction or magnetic pole, which means that the direction of magnetization is confirmed during sintering of the blank. However, neodymium magnets can only become magnetic after being magnetized. Magnetization is therefore one of the most critical steps in the magnet manufacturing process.

     Next we will introduce several common magnetization methods, as follows:

     1. Pre-magnetization: In the process of manufacturing neodymium magnets, the magnets are magnetized by exposing them to electromagnetic fields. This method is suitable for medium-sized or small neodymium magnets.

     2. Current impulse method (pulse magnetization): By conducting a strong transient current into the neodymium magnet through a coil or wire, a transient magnetic field is generated to magnetize the neodymium magnet. This method can be used for high-power neodymium magnets.

     3. Multi-pole magnetization method: Using a special magnetic circuit design, the magnetic field is evenly distributed during the magnetization process, so that the neodymium magnet can obtain the required magnetization in different directions. This method is commonly used to magnetize ring neodymium magnets.

     4. Vacuum magnetization: Magnetizing in a vacuum environment can reduce magnetic wear and oxidation.

     Magnet factories usually use professional magnetizing machines for magnetization. The magnetizer is equipped with a coil and electric current that when turned on emits an external magnetic field and activates the magnetism in the block.

     The magnetization method is determined based on various magnet properties such as material, strength and shape. In practical applications, choosing the appropriate magnetization method according to specific conditions can ensure that neodymium magnets obtain the required magnetic properties. But sometimes, others who handle magnets in industrial settings may need unmagnetized magnets. Welcome to consult our professional neodymium magnet manufacturer.