How to control the product quality of NdFeB permanent magnets

- Dec 13, 2018 -

First, magnetic properties


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


1. Raw material producers sinter NdFeB according to business needs or medium or low grade. The company only sells high-grade NdFeB in the national standard for raw materials purchased.


2. The advanced nature of the production process also determines the performance quality of the magnet.


3. Quality monitoring during production is very important.

 


Second, the shape size and tolerance value of the magnet


Various shapes of neodymium iron boron magnets, such as circular, shaped, square, tile-shaped, trapezoidal. Different sizes of materials are machined from different machine tools to cut rough materials. Advanced technology and machine operators determine the accuracy of the product.

 


Third, the surface coating treatment


The plating quality of the surface plating, zinc, nickel, nickel, copper and nickel plating copper and gold plating process. The product can be electroplated as required by the customer. The short and good summary of the quality of NdFeB products is to grasp the performance, control the dimensional tolerance, and judge the appearance and evaluation of the coating. Detecting the Gaussian surface of the magnetic flux of the magnet, etc.; dimensional tolerance, the accuracy of the caliper can be measured; the color and brightness of the coating, the coating and the bonding strength of the coating, and the surface of the magnet can be observed by appearance, with or without spots, with or without Drop the corners to assess the quality of the product.


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