AMF Catalogue magnetic clamping systems Page 6
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the AbCs And FAQs oF MAgnetiC ClAMping teChnology. > Working teMperature: up to this temperature, a magnet can be used without irreversible magnetisation losses. > curie teMperature: at this temperature, magnetic materials lose their magnetisation irreversibly. > FerroMagnetic Material: all materials that exhibit magnetisation after application of an external magnetic field. > Magnetic Field strength (a/M): amperes per meter (1a/m = 0.01256 oersted) > Magnetic Flux density (induction): the change in a material that is induced by an applied magnetic field. Symbol: B / unit: t > tesla (t): unit of magnetic induction 1 t = 10 4 gauß > gauss (g): outdated unit of magnetic induction. > saturation Max.: the workpiece no longer absorbs any magnetisation. > pole extensions: allow 5-side machining without interference contours. > neodyMiuM: magnetic material (ndFeB = neodymium-iron-Boron). they acquire a magnetic orientation during manufacture. > alnico: magnetic material (aluminium-nickel-cobalt) What happens iF there is a poWer Failure? the system is insensitive to possible power failures, and therefore „intrinsically safe“. hoW can the Magnetic claMping plates Be Fastened? a) laterally in the recesses with clamps (see catalogue „mechanical clamping elements“) b) in combination with an adapter plate for the amF zero-point clamping system can i claMp on one pole? at least two poles have to be covered in order for there to be a magnetic flux. For optimal clamping, however, 4 poles should be covered. What happens iF i Mill into the Magnetic claMping plate? the magnetic clamping plates can be reworked up to 4 mm by repeated re-grinding. this also restores the plane parallelism. What precision can i achieve With this systeM? Plane parallelism of up to 0.02 mm can be achieved by: 1) rough-milling the first surface 2) turning the plate over, rough-milling, stress-releasing and finishing the second plate 3) turning the plate over and finishing the first surface. is Mechanical deForMation possiBle during claMping? Quite the opposite. in the case of flame-cut parts, i.e. with very uneven workpiece surfaces, clamping is carried out with 3 fixed poles (3-point support) and with movable poles. the movable poles compensate for the unevenness, meaning that the workpiece is not deformed during clamping. Subject to technical alterations. 6 Magnetic claMping systeMs ANDREAS MAIER GmbH & Co. kg ∙ Phone: +49 711 5766-196 ∙ Web: www.amf.de
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