How to Control the Product Quality of NdFeB Permanent Magnets?

As a high-performance magnetic material in modern industry, NdFeB permanent magnets promote the progress of contemporary technology and society and are widely used in various fields. How to judge the advantages of permanent magnet products: 1. Magnetic properties; 2. The size of the magnet; 3. Surface coating.

1. Magnetic properties：First, the key to the decision is to control the magnetic properties of the raw materials during the production process.

• Raw material manufacturers can choose mid-range or low-grade sintered NdFeB according to business needs. In accordance with the national standards for purchasing raw materials, our company only sells high-grade NdFeB.

• The quality of the production process also determines the performance of the magnet.

• Quality control during production is important.

2. Magnet shape, size and tolerance: Utilize various shapes of NdFeB magnets, such as round, special-shaped, square, arc-shaped, trapezoidal. Different sizes of materials are processed by different machine tools to cut rough materials, the technology and machine operator determine the accuracy of the product.

3. Surface coating treatment: The coating quality of the surface coating, zinc, nickel, nickel-copper-nickel electroplating copper and gold and other electroplating processes. The product can be electroplated according to customer requirements.

The quality of NdFeB products can be summarized as a good grasp of performance, dimensional tolerance control, and appearance inspection and evaluation of the coating. Tests such as the Gaussian surface of the magnetic flux of the magnet; dimensional tolerance, which can be measured with a vernier caliper; coating, coating color and brightness and coating bonding strength, and the appearance of the magnet surface can be observed to be smooth, with or without spots, and with or without edges and corners, to evaluate the quality of the product.