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 for modern industry, it promotes the progress of modern technology and society and is widely used in various fields. How to judge the comprehensive advantages of permanent magnet products: 1. Magnetic properties ; Second, the size of the magnet; Third, the surface coating.
Ⅰ. Magnetic properties of NdFeB permanent magnets
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 the business needs or the national standards for purchasing raw materials for mid-grade or low-grade sintered NdFeB.
2. The advanced nature of production technology also determines the performance and quality of NdFeB permanent magnets.
3. Quality monitoring of NdFeB permanent magnets is important in the production process.
Ⅱ. Magnet shape, size and tolerance value of NdFeB permanent magnets
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.
Ⅲ. Surface coating treatment of NdFeB permanent magnets
The coating quality of the surface coating, zinc, nickel, nickel-copper-nickel electroplating, copper alloy 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 NdFeB permanent magnet coatings.
Detecting the Gaussian surface of the magnetic flux of the magnet, etc.; 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.
The surface of the magnet can be observed to be smooth and clean, with or without spots, and with or without edges and corners to evaluate the quality of NdFeB permanent magnet products.
Ⅳ. Warehouse preservation of NdFeB permanent magnets
Many factories now know the importance of warehouse management and advocate zero inventory management in warehouses. Because the backlog of inventory will increase the company's property backlog, and in the end many goods will become scrap.
Now many NdFeB buyers, in order to actively implement warehouse zero inventory management, sometimes place orders for the same NdFeB permanent magnet product several times a month. As a result, the supplier's delivery time cannot keep up with the product. Shipping date requirements, there are a lot of troubles.
NdFeB magnets are the most powerful magnets in the world and are widely used. It is also a permanent magnet. In a good environment, it will not affect any use after several years of storage.
Therefore, if some companies purchase NdFeB permanent magnets under the condition that a product is relatively mature, they can reduce the number of purchases and increase the number of purchases each time. Have more safety stock! NdFeB is a permanent magnet, so there is no need to worry about demagnetization after storage for a period of time.
NdFeB magnets are permanent and magnetic, but we should pay attention to storing them in a normal temperature and dry environment during storage. If they are not used for a long time, it is recommended to pack NdFeB permanent magnets in vacuum bags, and do not expose them to the air for a long time.