Permanent magnet chuck a stable and efficient choice for industrial handling

Table of Contents

• What is a permanent magnet chuck?

• The principle of permanent magnetic chuck

• Design of permanent magnetic chuck

• Characteristics of permanent magnetic chuck

What is a permanent magnet chuck?

Permanent magnetic chuck, also known as magnetic chuck or permanent magnetic jack, is a necessary handling tool for machinery factory, mold factory, forging factory, steel mill, shipyard and other places where steel is used. It can greatly improve the handling efficiency of massive, cylindrical, plate and irregular magnetic conductive steel materials. The permanent magnet chuck is made of high-performance rare earth material neodymium iron boron (N>40) as the core. By manually turning the handle of the chuck, the magnetic system of neodymium iron boron inside the chuck is changed, achieving the absorption or release of the workpiece that needs to be transported. Principle of permanent magnetic chuck: The permanent magnetic chuck is designed by using the continuity principle of magnetic flux and the superposition principle of magnetic field. The magnetic circuit of the permanent magnetic chuck is designed into multiple magnetic systems. Through the relative movement of the magnetic systems, the magnetic field intensity on the working magnetic pole can be added or eliminated, so as to achieve the purpose of holding and unloading. Design of permanent magnetic chuck: When designing permanent magnetic chuck, the first step is to carefully design the magnetic circuit. A good magnetic circuit structure can allow more magnetic flux to accumulate on the working surface as much as possible, meeting the requirements of lifting weight, and minimizing the use of neodymium iron boron materials. At the same time, when designing the magnetic circuit, careful consideration should also be given to the ease with which the operator can achieve work unloading. Solve technical difficulties such as high suction force of permanent magnetic chuck and difficulty in pulling the handle.

After years of rapid development, China's electric permanent magnetic chuck have been widely used in various metal cutting machine tools such as surface grinders, CNC milling machines, machining centers, mold testing and rapid mold replacement in the mold industry, transportation processes such as uncoiling, stacking, cleaning, and stamping of steel plates in automated production lines in the automotive and home appliance industry, as well as lifting and handling of large steel plates and blocks in cargo yards and docks.

As an irreplaceable important equipment and means in advanced manufacturing, electric permanent magnetic chuck have become an important indicator of a country's manufacturing and technological level.

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 chucks have emerged.

The principle of permanent magnetic chuck

The permanent magnet chuck is designed based on the principle of continuity of magnetic flux and the superposition principle of magnetic field. The magnetic force line comes out from the N pole of the magnet, passes through the yoke, passes through the ferromagnetic workpiece, and then returns to the yoke to enter the S pole of the magnet. In this way, the workpiece can be firmly sucked onto the working surface of the permanent magnet chuck.

If the magnetic field line does not reach the working pole surface of the permanent magnet chuck, a closed circuit of the magnetic circuit is formed inside the permanent magnet chuck. Almost no magnetic field line comes out of the working pole surface of the permanent magnet chuck, so there is no suction on the workpiece, and unloading can be achieved smoothly.

Design of permanent magnetic chuck

The structure of a permanent magnet chuck is assembled from accessories such as a panel, magnet, base, clamp, wrench, etc. When designing permanent magnetic chuck, the first step is to carefully design the magnetic circuit. A good magnetic circuit structure can allow more magnetic flux to accumulate on the working surface as much as possible, meeting the requirements of lifting weight, and minimizing the use of neodymium iron boron materials. At the same time, when designing the magnetic circuit, careful consideration should also be given to the ease with which the operator can achieve work unloading. Solve technical difficulties such as high suction force of permanent magnetic chuck and difficulty in pulling the handle.

The magnetic circuit design of a permanent magnet chuck has two magnetic systems, which are divided into active and fixed parts. Change the state of the active magnetic system so that the working poles are in a state where the magnetic field is superimposed or reversed, and the magnetic field is cancelled out. At the same time, in the permanent magnet circuit, in order to reduce magnetic resistance and increase the magnetic flux density of key parts of the working pole surface, some soft magnetic materials are used as magnetic yokes.

Characteristics of permanent magnetic chuck

1. Adopting high-performance permanent magnet material Nd Fe B as the core of the product, the product has a smaller volume, stronger lifting force, and long-lasting magnetic force.

2. The safety factor of the permanent magnet chuck is 3.5 times the maximum rated lifting capacity.

3. The "V" shaped groove design at the bottom of the permanent magnet chuck can enhance the corresponding round steel and circular magnetic profiles.

4. The permanent magnet chuck can be used without electricity, saving the trouble of power supply.

5. The optimized magnetic circuit design of the permanent magnet chuck ensures almost zero residual magnetism.

6. The professionally designed permanent magnet chuck appearance makes the product more beautiful.