In China's mechanical processing, mold manufacturing, metallurgy and other industries, some heavy steel plate or iron plate, precision requirements or surface roughness requirements of steel processing products or semi-finished products, most of the previous use of steel wire rope binding and lifting, or also useful electromagnet lifting, but the electromagnet is large, high cost, more failures, difficult maintenance, and electromagnet in the work, To consume a lot of electricity, once the power failure, prone to accidents.

　　With the emergence of high-performance NdFeb rare earth materials, the use of NdFeb permanent magnet materials to develop magnetic tools has become a trend, and permanent magnet chuck came into being.

　　Permanent magnet chuck, also known as magnetic chuck or permanent magnet jack, is a necessary handling tool for machinery factories, mold factories, forging factories, steel mills, shipyards, etc., which can greatly improve the handling efficiency of block, cylindrical, plate, irregular magnetic conductive steel materials. Permanent magnet chuck is a high-performance rare earth material Ndfeb (N> 40) As the core, by hand pulling the suction cup handle rotation, thereby changing the magnetic system of Ndfeb inside the suction cup, to achieve the need to carry the workpiece holding or release. Principle of permanent magnet sucker: permanent magnet sucker is designed using the continuity principle of magnetic flux and the superposition principle of magnetic field. The magnetic circuit of the permanent magnet sucker is designed into multiple magnetic systems. Through the relative motion of the magnetic system, the magnetic field strength on the working magnetic pole surface is added or eliminated, so as to achieve the purpose of holding and unloading. Design of permanent magnet chuck: When designing permanent magnet chuck, we should first carefully design the magnetic circuit, a good magnetic circuit structure can try to let more magnetic flux gather in the working surface to meet the requirements of lifting weight, and can use as little NdFeb material as possible. At the same time, the design of the magnetic circuit should also carefully consider that the operator is easier to achieve working unloading. Solve the technical difficulties such as the large suction force of the permanent magnet chuck and the difficulty of pulling the handle.

　　Principle of permanent magnet chuck:

　　The permanent magnet sucker is designed using the continuity principle of magnetic flux and the superposition principle of magnetic field. The magnetic circuit of the permanent magnet sucker is designed into multiple magnetic systems. Through the relative motion of the magnetic systems, the magnetic field intensity on the working magnetic pole surface can be added or eliminated, so as to achieve the purpose of holding and unloading.

　　Characteristics of permanent magnet chuck:

　　1) The permanent magnet chuck uses high-performance permanent magnet material NdFeb (Nd-Fe-B) as the core of the product, making the product smaller, stronger lifting force, and permanent magnetic force.

　　2) The permanent magnet suction cup has a safety factor of 3.5 times the rated lifting gravity.

　　3) The bottom surface of the permanent magnet chuck "V" groove design, can lift the corresponding round steel, steel plate.

　　4) Permanent magnet suction cups can be used without electricity, saving the trouble of power supply.

　　5) The optimized magnetic circuit design of the permanent magnet chuck makes the remanence almost zero.

　　6) The appearance of permanent magnet suction cup design makes the product more beautiful.

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