Patent ID: 9108287
Filing Date: 2015-08-18
Classification: B24B

Abstract:
1. A method for grinding main and rod bearings of a crankshaft by external cylindrical grinding in a grinding machine which has workpiece rotary drives and chucks located thereon, comprising: a) in a first setup, rough- and finish-grinding all the rod bearings; b) then, bringing the crankshaft into a second setup, and rough- and finish-grinding all the main bearings in the second setup; c) in both setups, clamping the crankshaft at two unground clamping points which are spaced axially apart from one another and have a rough contour; d) to achieve the second setup, operating a compensating chuck of said chucks to effect actuation of a first rotary drive, among said workpiece rotary drives, and cause rotation about a defining geometrical longitudinal axis of the crankshaft; e) to achieve the first setup, bringing the defining geometrical longitudinal axis of the crankshaft into line with the rotational axis of the first rotary drive; f) at one or more of the two clamping points of the first setup, positioning two supporting members, which are located on a second chuck of the first rotary drive and are radially movable, at said clamping points and locking said supporting members together in said position to form a support in a configuration of a prism which is operationally fixed to the second chuck; g) positioning at least one clamping member, arranged radially opposite the supporting members, at the clamping point and thereby securing the position of the crankshaft on the supporting members; and h) setting the rotary drive of the first setup in rotation, wherein an axis of said rotation of said rotary drive of the first setup is said defining geometrical longitudinal axis of the crankshaft.