Select Lifting Magnets For Overhead Cranes

Both lifting electromagnet and permanent magnets lifter are important lifting appliances in the machining industry or steel transfer process. Many customers will ask how to choose electromagnet or permanent magnet for a crane.

The electromagnet generates magnetic force after being energized, and the permanent magnet is the chuck with permanent magnetic force.

The lifting electromagnetis characterized by generating magnetic force after power on. The magnetic force can be adjusted and turned off by the controller. Permanent magnet can not be adjusted and controlled, but its durability is better than that of electromagnet.

Lifting Electromagnet Precautions

1. The surface of the electromagnetic chuck shall be cleaned before use to avoid scratches.

2. Serious collision is not allowed, so as not to affect the accuracy.

3. After use, it shall be wiped clean and coated with anti rust oil to prevent corrosion.

4. When the electromagnetic sucker is used alone, there should be a grounding wire to avoid electric leakage

Lifting Electromagnet Advantage：

(1)Suction cup suction :

The holding force of the electric control strong suction cup is extremely strong, up to 16kg/cm ²， The magnetic force is evenly distributed and adjustable, which can be used for various powerful machining, rough machining and fine machining; The ordinary strong suction cup has weak suction force and uneven distribution, so it cannot bear the requirements of strong machining operation.

(2)Performance：

The electrically controlled strong suction cup can be used continuously. Even if it works continuously for more than 20 hours every day, it will not have any fault and does not require any maintenance; The ordinary permanent magnet sucker will have a drop in suction after half a year of use, while the electromagnetic sucker can only work for several hours every day, and the equipment is easy to work, requiring frequent replacement and maintenance of internal components.

(3)Operation efficiency :

The use of ordinary strong suction cups requires a lot of work piece adjustment time, which can account for 40% - 50% of the whole processing process. Moreover, the clamping and positioning are prone to obvious errors, high scrap rate and very low efficiency; The electrically controlled strong suction cup has the function of automatic auxiliary positioning. Simply press a button and the workpiece will be clamped or released in 0.3 seconds, which can greatly improve the production efficiency.

Permanent magnet lifter, also known as magnetic sucker or permanent magnet hoist, is a necessary handling tool for machinery factories, die factories, forging factories, steel mills, shipyards and so on. It can greatly improve the handling efficiency of massive, cylindrical, plate and irregular magnetic conductive steel materials. Permanent magnet sucker is a high-performance rare earth material Ferric ferric (N)40) as the core, through the hand report to move the handle of the sucker, so as to change the internal ferric ferric magnetic system, to achieve the need to move the workpiece suction or release.

Whether it is an lifting electromagnet or a permanent magnet lifter, it has different applications in different occasions and locations, and each of them plays its own advantages. The key points are as follows:

1. Size and weight of hoisted objects

2. Work efficiency

3. Application occasions and working conditions

When steel factory cranes or port cranes are used to transport scrap, deformed steel bars, billets and other materials, electromagnet need to be selected with high efficiency and fast transfer speed.

In some machining workshops, it is occasionally necessary to use permanent magnet to transfer workpieces. At this time, it is better to equip the crane with permanent magnet.

Use of permanent magnet lifter:

1. Place the workpiece ON the sucker workbench surface, and then insert the wrench into the shaft hole and turn 180 to "ON "in the clockwise direction, then the workpiece can be sucked for processing.

2. After the workpiece is processed, insert the wrench into the shaft hole and turn it counterclockwise 180 to "OFF ", that is, the workpiece can be removed.

Permanent magnet lifter maintenance and maintenance:

1. The surface should be wiped clean before using the sucker so as not to scratch the accuracy.

2. The ambient temperature is -40℃-50℃. Do not knock to prevent magnetic force reduction.

3. After use, the working face is coated with anti-rust oil to prevent corrosion.