Patent ID: 7387008
Filing Date: 2008-06-17
Classification: B21H,B23P,B24B,C21D,Y10T

Abstract:
1. A crankshaft rolling apparatus that allows roll hardening of closely spaced bearings of crankshafts in a single rolling operation, the crankshaft rolling apparatus comprising: a crankshaft rotary support device including a motor for rotating the crankshaft about an axis thereof; a plurality of arms having a narrow configuration in a widthwise dimension thereof generally extending along the crankshaft axis and being elongated in a lengthwise dimension thereof transverse to the crankshaft axis, the arms carrying rolling tools for rolling the crankshaft bearings; a plurality of pivotal support structures each pivotally mounting one of the arms for allowing the arms to roll bearings eccentrically oriented relative to the crankshaft axis; a single narrow drive cylinder assembly on each of the narrow arms for shifting the rolling tools into clamping engagement with the bearings with a predetermined variable and high clamping force for roll hardening of the crankshaft bearings; and a plurality of small force generating cylinders of each of the drive cylinder assemblies that cooperate to generate the predetermined variable and high clamping force thereof and which are aligned with each other so as not to increase the narrow arm width allowing the arms to be closely positioned one next to the other for simultaneous rolling of closely spaced crankshaft bearings.