The general production process of the nickel -cobalt magnet is: large (large -sized) blanks after sintering and recovery, processing (including cutting, drilling) and grinding, surface coating (coating) treatment by mechanical processing, and then detecting magnetic performance, then detecting the performance of the magnet, and then detecting the performance of the magnetic, Surface quality and size accuracy, then magnetize, packaged and leave the factory.
The processing of aluminum nickel cobalt magnet can be divided into three categories:
(1) Cut: Cut the cylindrical magnet and square cylindrical magnets into round and square thin slices;
(2) shape processing: processing circular and square magnets into fan -shaped, tiles, slot -shaped magnets or other complex shapes;
(3) Drilling: Machining the round strip and square magnets into cylindrical or square cylindrical magnets. Machining methods include grinding, electric spark processing and laser processing.
2. The surface of the aluminum nickel cobalt magnet parts generally requires smooth and a certain accuracy is achieved. The surface of the magnet sent by the blank needs to be polished on the surface. The commonly used grinding methods commonly used in square oligoma boron permanent magnet alloy include flat grinding, double -sided grinding, internal round grinding, and outer round grinding. Cylinder is usually used for unintentional grinding, double -sided grinding, etc. Multi -site grinding beds are used for tiles, fan -shaped blocks and VCM magnets.
Whether the magnet is qualified not only requires performance standards, but the control of size tolerance directly affects its application. The size guarantee directly depends on the processing strength of the factory. Processing equipment has been updated with economic and market demand. The trend of more efficient equipment and industrial automation not only meets customers' demand for product accuracy, but also saves manpower and costs, making it more competitive in the market.
3. The quality of magnetic coating directly determines the service life of the product.
Aluminum cobalt magnets are oxidized and corroded for 51 days in air at 150 ° C. It is easier to corrode in weak acidic solutions. In order to make aluminum nickel cobalt magnets durable, it is required to have a life span of 20-30 years. Surface anti -corrosion treatment must be performed to resist the corrosion of the magnetic medium on the magnet. At present, the manufacturing of AL-NI-CO magnets generally use electroplating metal, electroplating+chemical plating metal, electro-swimming, phosphorification and other methods. The surface of the magnet is plated with an additional cushion, which separates the magnet surface from the corrosive medium to prevent the media from invading the magnet.
1. Generally, there are three processes: galvanized, nickel -plated+copper+nickel plating, nickel plating+copper+chemical nickel plating. For other metal electroplating requirements, other metal plating is usually performed after nickel plating.
2. Phosphorusization is also applicable to some special circumstances: (1) The turnover of the iron boron magnetic products has been stored for a long time, and the subsequent surface treatment method is unclear, the phosphoruration is simple and easy to use; During oxygen, the adhesion of epoxy organic matter such as glue and paint requires the substrate with good permeability. Phosphate treatment can improve the moisture on the surface of the magnet.
3. Electric sword painting has become one of the widely used anti -corrosion surface treatment techniques. Because it not only has a good adhesion on the surface of the porous magnet, but also has excellent salt -resistant erosion and acid alkali corrosion performance. But compared with spray, its damp -resistance resistance is poor.
