In China's mechanical processing, mold manufacturing, metallurgy and other industries, some heavy steel or iron plates, precision or surface roughness requirements of steel processing products or semi-finished products, etc. were previously mostly lifted using steel wire rope bundling, or using electromagnets for lifting. However, electromagnets have a large volume, high cost, multiple faults, and maintenance difficulties. In addition, electromagnets consume a large amount of electrical energy during operation, and once power outage occurs, Accidents are prone to occur. With the emergence of high-performance neodymium iron boron rare earth materials, the development of magnetic tools using neodymium iron boron permanent magnetic materials has become a trend, and permanent magnetic suction cups have emerged.

Permanent magnet suction cups, also known as magnetic suction cups or permanent magnet hoists, are essential tools for handling steel materials in machinery factories, mold factories, forging factories, steel mills, shipyards, and other places where steel is used. They can greatly improve the handling efficiency of block, cylindrical, sheet, and irregular magnetic steel materials. The permanent magnet suction cup is made of high-performance rare earth material neodymium iron boron (N>40) as the core. By manually turning the handle of the suction cup, the magnetic system of neodymium iron boron inside the suction cup is changed, achieving the absorption or release of the workpiece that needs to be transported.