Patent ID: 9205487
Filing Date: 2015-12-08
Classification: B22D

Abstract:
1. A rotor die casting device comprising an integrated lamination stack height compensation assembly, the assembly comprising: a moveable slider plate having at least one tapered surface; an annular die cast component arranged perpendicular to an axis of motion of the slider plate; a plurality of posts positioned about the perimeter of the annular die cast component, an end of each post in contact with the tapered surface of the slider plate; a mandrel positioned coaxial to the annular die cast component and comprising a stepped distal periphery such that a plurality of ferromagnetic laminations may be stacked therebetween, the stack defining a lamination stack height, an outer diameter and an inner diameter; and a compensation ring disposed along the stepped distal periphery, the compensation ring configured to interposition with the stepped distal periphery of the mandrel such that a clearance gap exists between the mandrel and the compensation ring, the assembly configured such that upon activation, the slider plate engages and guides the posts up the tapered surface to transfer a compressive force through the annular die cast component such that a clamping pressure is applied to the outer diameter of the lamination stack, the compressive force sufficient to deform the compensation ring to close the clearance gap to a compensating degree sufficient to ensure that the compensation ring applies a clamping pressure to the inner diameter of the lamination stack.