Introduction to Magnet Purchase Requirements When purchasing magnets, it's crucial to specify both the basic attributes of the magnets and the expected delivery timelines to ensure alignment with project schedules.
Basic requirements for magnets
When we want to clearly explain the purchase demand of a magnet, there are several key points that need to be clarified: performance requirements, shape and size, magnetization direction and surface treatment requirements. The purchaser is better to provide drawings of the magnet.
That is, the brand requirements of the magnet. There are many suppliers in the magnetic material industry. Each company has different definitions and performance ranges for the same brand. When communicating the brand, it is recommended that both the supply and demand parties clarify the remanence Br and intrinsic coercivity Hcj of the corresponding brand, so that it is not easy to cause deviations. (If the purchaser is not clear about the product brand, then some auxiliary judgment indicators need to be provided, such as surface magnetism, tension, magnetic flux/magnetic moment, etc.)
In addition, according to factors such as the working environment of the magnet, indicators such as remanence and coercivity temperature coefficient can be further clarified.
If there are clear requirements for indicators such as flux, the detection equipment and detection method should be agreed as the judgment standard.
When describing the purchasing requirements, the basic shape and size requirements of the magnet must be clear. For simple products, provide basic length, width and height dimensions and tolerances; for complex-shaped magnets, it is necessary to provide more clearly, and it is recommended to provide clear drawings to suppliers. In addition, the magnet also needs to mark the product's orientation direction (N/S pole) and magnetization method (single pole or multi-pole charging), as well as the magnetization angle, etc.
The purchaser needs to specify the surface treatment method of the magnet, including coating method (electroplating, chemical plating, electrophoresis, vapor deposition, etc.), coating material (zinc, nickel, copper, aluminum, epoxy resin, etc.), and coating thickness. If there are requirements for salt spray or other tests, the setting of the test conditions, the placement time and the judgment criteria after the test must be agreed upon.
Such as: appearance requirements, other test requirements (such as aging tests, etc.), packaging requirements, transportation requirements, etc.
In most cases, we have magnet blanks in stock, and there is a certain amount of reserve for general performance. The shape of the magnet roughly determines the length of the product's delivery time.
Customized products generally require special molds. If there is no mold of the right size, there will be a mold production time, and the product delivery time will be extended to a certain extent.
The overall construction period can be compressed. We can compress the delivery time according to customer needs. For products with urgent delivery dates, customers are advised to place orders in advance.
Thoroughly detailing these elements when ordering magnets can significantly enhance the procurement process, ensuring that the products meet precise operational requirements and are delivered within necessary timelines.
