Abstract: Packet of plates provided with fixing means, characterized in that at least some of the plates have a cut-out to form a housing receiving an insert provided with fixing means and having a fixing axis, the housing having at least one wall cooperating with an exterior surface of the insert to retain the insert along the fixing axis. Method of manufacturing such a packet.

Abstract: The method makes it possible to form a stator of an electric motor by means of a multiple-slide press (21, 22, 23). The starting point is a bundle consisting of rectilinear segments of sheets obtained by stamping and welded. The stator is formed by means of four successive operations carried out by four groups of slides of a multiple-slide press and corresponding dies. The cylinder formed is subsequently welded along its joining generatrix and is calibrated in a hydraulic press.

Abstract: The method makes it possible to form a stator of an electric motor by means of a multiple-slide press (21, 22, 23). The starting point is a bundle consisting of rectilinear segments of sheets obtained by stamping and welded. The stator is formed by means of four successive operations carried out by four groups of slides of a multiple-slide press and corresponding dies. The cylinder formed is subsequently welded along its joining generatrix and is calibrated in a hydraulic press.

Abstract: Apparatus for manufacturing piles of magnetic plates of annular shape from stamped sheet metal segments having slots open toward the inside and formed by radially directed arms having enlarged inner ends comprises six operating stations namely a first station in which sheet metal segmented are fed from magazines to build up a stack of plates in which successive layers of segments are angularly staggered, a second station at which the height of a partially formed stack of segments is measured, third and fourth stations for feeding additional thinner segments or thicker segments to the stack according to the measurement in order to obtain a stack of predetermined thickness, a fifth station at which the segments are centered and fitted with rivets and a sixth station at which the stack of segments is compressed and the rivets are set.