Patent ID: 8967603
Filing Date: 2015-03-03
Classification: B23Q

Abstract:
1. A magnetic device for gripping and clamping a workpiece in a machining unit or on a machining line, said device comprising; a magnetic plate including a distribution of high-energy permanent-magnet modules, which can be electrically activated, said plate having two plane and opposite main surfaces, giving out onto which are the poles of said permanent-magnet modules; said referencing means comprising at least two locating pins carried by said workpiece-holder plate and having axes orthogonal to said main surface of the magnetic plate, said locating pins being prearranged for being received within seats formed in the workpiece so as to enable a precise referencing of the position of the workpiece with respect to the auxiliary workpiece-holder plate in the plane of the main surface of the magnetic plate, said auxiliary workpiece-holder plate having a top surface shaped in a way complementary to the surface of the workpiece that is to rest thereon; and said top surface of the auxiliary workpiece-holder plate having a plurality of supporting pads for resting of corresponding portions of the bottom surface of the workpiece in such a way that the bottom surface of the workpiece and the top surface of the auxiliary workpiece-holder plate are kept slightly set apart from one another for most of their extension.