Smelting is a process for producing sintered NdFeB strong magnets. The smelting furnace produces alloy strips. This process requires the furnace temperature to reach about 1300 degrees and lasts for four hours to complete. After this process, the raw material of the magnet is processed into alloy sheets by hot melting and cooling, and then the next process is carried out hydrogen crushing. The smelting section is carried out after the batching, and this process is responsible for casting the batched materials into sheets or ingots, which are completed by the large furnace and the small furnace respectively.
The NdFeB magnet smelting section plays a crucial role in the subsequent powder milling, magnetic field orientation, and sintering. Improper handling of such a link will have an irreversible impact on the overall performance of the magnetic material. The magnet blank is put into storage after the magnetic function test is judged to be qualified. According to the order requirements, it will be shipped out of the warehouse and entered into the cylindrical grinder workshop. The commonly used grinding and processing methods for square NdFeB magnet blanks are flat grindings, both ends grinding, internal grinding, external grinding, etc. Coreless grinding and double-ended flat grinding are often used for cylindrical NdFeB magnet blanks. Multi-station grinders are used for tile-shaped magnets, sector-shaped, and special-shaped NdFeB magnet blanks. The cylindrical grinding machine should perform rough grinding and fine grinding processing according to the outer diameter of the cylindrical blank. The rough grinding will remove the black oxide skin that occurs during sintering. Within the scope of public service, after the cylindrical grinding process, all the columns will enter the next process, the viscose processing of the magnet light column, in preparation for batch slicing processing.
Determining whether a magnet product is qualified not only requires the qualified function but also directly affects its product function and application. And the accurate guarantee of the public service value of the magnet scale also directly depends on the product manufacturing strength of the factory. Processing equipment is constantly updated with the needs of economic and social markets. More efficient equipment and the automation trend of industrial processing not only satisfy customers' increasing demand for magnet precision but also save manpower and cost. One of the production processes of NdFeB magnets: is smelting is a product with market competitiveness.
