How to control the product quality of NdFeB permanent magnets

NdFeB permanent magnet is also called modern industrial monosodium glutamate. As a high-performance magnetic material of modern industry, it promotes the progress of contemporary technology and society and is widely used in various fields. How to judge the comprehensive advantages of permanent magnet products: 1. Magnetic performance; Second, the size of the magnet; Third, the surface coating.

1. Magnetic properties
   First, the key to the decision is the magnetic properties of the raw materials that control the production process.
   （1） Raw material manufacturers only sell high-grade NdFeB according to business needs or the national standards for purchasing raw materials for mid-grade or low-grade sintered NdFeB.
   （2） The advanced nature of the production process also determines the performance and quality of the magnet.
   （3） Quality control in the production process is important.
2. Magnet shape size and tolerance value
   Utilize various shapes of NdFeB magnets, such as round, special-shaped, square, tile-shaped, trapezoidal. Different size materials are processed by different machine tools to cut rough materials. Advanced technology and machine operators 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. Plating options can be done on the product according to customer requirements. A brief summary of the quality of NdFeB products is to grasp the performance, dimensional tolerance control, and judge the appearance inspection and evaluation of the coating. Detect the Gaussian surface of the magnetic flux of the magnet, and other tests; dimensional tolerance, the accuracy that can be measured with a vernier caliper; coating, the color and brightness of the coating and the bonding force of the coating, and the surface of the magnet can be observed by appearance. Drop edges and corners to evaluate the quality of the product.