The guarantee of size depends on the strength of the factory, and the shapes of powerful magnets for practical applications are various.
as follows:
①Disc, cylindrical, cylindrical (with inner hole);
② Square, square, square column;
③Tile-shaped, fan-shaped, trapezoidal, polygonal and various irregular shapes, etc.
Magnets of each shape have different sizes, and it is difficult to do one-time molding in the production process. The general production process is: first produce large (large-sized) billets, after sintering and tempering treatment, and then through mechanical processing (including cutting, drilling) and grinding, surface coating (coating) treatment, and then carry out Inspection of magnet performance, surface quality and dimensional accuracy, followed by magnetization, packaging and delivery.
Powerful magnet machining is divided into three categories:
(1) Drilling processing: The round rod and square rod magnets are processed into cylindrical or square cylindrical magnets. The processing methods are: grinding and slicing, EDM and laser processing.
(2) Cutting processing: cutting cylindrical and square cylindrical magnets into discs and squares;
(3) Shape processing: round and square magnets are processed into fan-shaped, tile-shaped or magnets with grooves or other complex shapes;
The surface of sintered permanent magnet components generally requires smoothness and a certain degree of precision, and the surface of the magnet delivered from the blank needs to be surface-ground. The commonly used grinding methods for square permanent magnet alloys include plane grinding, double-end grinding, internal grinding, and external grinding. Cylinders are commonly used for coreless grinding and double-end grinding. Tile, sector and VCM magnets use a multi-station grinder.
A qualified magnet not only needs to meet the performance standards, but also the control of dimensional tolerances directly affects its application. The guarantee of size directly depends on the processing strength of the factory. The processing equipment is constantly updated with the economic and market demand. More efficient equipment and the trend of industrial automation not only meet the increasing demand of customers for product accuracy, but also It saves manpower and costs and makes it more competitive in the market.
Many customers have asked about single-sided magnets, and here is a brief introduction.
Magnets all have two poles, but in some working positions, a single-sided magnet is required, so it is necessary to wrap one magnet with an iron sheet, so that the magnetism on the side covered by the iron sheet is shielded, and the magnet on the other side is refracted by the iron sheet. The magnet increases the magnetic force of the magnet on the other side. Such magnets are collectively referred to as single-sided magnets or single-sided magnets. There is no real single-sided magnet, and its shape is generally in the shape of a disc.
