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Ningbo Xinfeng Magnet Industry Co., Ltd.
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Technical Support
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| While the surface condition i.e the area of contact is very important, but in general a smooth flat surface as supplied by Major Steel Plant is good enough. The magnet should always be hanged from centre of the job i.e used in equilibrium as far as possible. | |
| A magnet can lift 1000 Kgs of Solid Steel Plate providoed the plate is more than 50 mm thick and the maximum size is 2000 x 2000 mm. A Magnet can lift 100% at plate > 50 mm thick and will lift only 60% when the thickness is 25 mm. So the magnet capacity is to be derated depending upon the plate to be handled | |
| If the thickness is less, the magnetic induction in steel is less and so the lifting capacity is reduced | |
| The overhanging of the plate from the Magnet should not be more than 1000 mm in any case provided the plate is more than 25 mm thick and it does not bend when lifted by the Magnet. | |
| So if the thickness is less and the length is more than 2000 mm, then instead of high capacity magnet, more than one magnet of lower capacity is used making sure that the overhanging on width is not more than 800 mm and length 1000 mm. for Example if you have to lift a plate of say 6000 x 2000 x 12 mm thick, you need to hang atleast 4 Sets of magnets (Each set consist of 2 Nos. magnet side ways) and they are hanged from a spreader beam of 4000 mm x 1000 mm. | |
| For handling plates of various sizes, generally we make telescopic Plate Handling System which is basically a spreader beam having 2 sets of fixed magnets and 2 set of magnets moving between 800 to 1100 mm each side. | |
| The magnets are hanged by Spring suspension box with loose chain so that it takes care of the bendness of the plates available in market. Such handling of plates commercially available is no problem |
