| 摘要 |
<p>The present invention concerns a method for safely mounting and/or removing a magnetic apparatus (10A, 10B, 10C, 10D, 10E, 10F) from ferrous elements. The apparatus has a support structure (11, 11A) having predetermined width (L), length (1) and thickness (S) with a plurality of pole pieces (30A), first and second sides (12, 13) being formed in said support structure (11, 11A) at the larger opposite surfaces, said plurality of pole pieces (30A) able to generate in said first and/or second sides (12, 13) a first magnetic flux (F1,F2) so as to define a first magnetic clamping surface (12) for magnetically clamping first ferrous elements (P1) and a second magnetic clamping surface (13) for magnetically clamping second ferrous elements (P2). The method comprises the step of providing said magnetic apparatus (10A, 10B, 10C, 10D, 10E, 10F) said pole pieces (30A) comprising at least one a reversible permanent magnetic core (40) and an electric coil (30) extending therearound for changing the magnetization state of the reversible permanent magnetic core (40). The method is characterized by the fact that said first magnetic flux (F1,F2) coming out of second magnetic clamping surface (13) and reclosing into an adjacent pole piece (30A) with a predetermined field depth (T), and by the step of providing a ferromagnetic place cover to be laid over the entire surface of said first magnetic clamping surface (12) allowing said first magnetic flux (F1,F2) emitted from said first side (12) to be enclosed, demagnetizing said permanent magnet (40), mounting and/or removing said magnetic apparatus (10A, 10B, 10C, 10D, 10E, 10F) from said second ferrous elements (P2).</p> |
