NingBo BeiLun Meank Magnetics Co., Ltd
NingBo BeiLun Meank Magnetics Co., Ltd
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How to Control the Product Quality of NdFeB Permanent Magnets?

NdFeB permanent magnets are also called modern industrial monosodium glutamate. As a modern industrial high-performance magnetic material, it promotes the progress of contemporary craftsmanship and society. It is widely used in various fields. How to judge the overall advantages of permanent magnet products: 1. Magnetic performance; 2. Shape and size of the magnet; 3. Surface coating.


1. Magnetic properties of the NdFeB permanent magnets

First of all, the key to the decision is to control the magnetic properties of the raw materials used in the production process.


(1) According to the business needs or mid-range or low-end sintered NdFeB, the raw material manufacturer only sells high-end NdFeB according to the national standards for purchasing raw materials.

(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 of the NdFeB permanent magnets

Use various shapes of NdFeB magnets, such as ring NdFeB magnets, special-shaped NdFeB magnets, rectangle NdFeB magnets, tile-shaped NdFeB magnets, trapezoidal NdFeB magnets for selection. Materials of different sizes are processed using different machine tools to cut rough materials. Advanced technology and machine operators determine the accuracy of the product.


3. Surface coating treatment of the NdFeB permanent magnets

The surface plating layer adopts zinc, nickel, nickel-electroplating copper and gold electroplating processes. It can carry out electroplating options for products according to customer requirements. To judge the quality of NdFeB products, a brief summary is to grasp the performance, dimensional tolerance control, and judge the appearance inspection as well as evaluation of the coating. Carry out tests such as Gaussian surface to detect the magnetic flux of the magnet; dimensional tolerance can be measured with vernier calipers; Coating: Observe the color and brightness of the coating and the adhesion of the coating. You can also observe the magnet's surface smoothness, spots, edges and corners through appearance to evaluate the quality of the product.

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