Method for deep rolling of transitions between the bearing journals and the flanges of crankshafts

摘要

For the fillet deep rolling of crankshafts (1), for cold forming of radii or depressions (2) at the transit between the journal (3) and the neighboring cheek (4) at the bearing mounting, the crankshaft is rotated at the roller to give a deep rolling force up to a given depth (10) in the transit. Initially, the first roller (5) has a radius (6) to the transit with a deep rolling force in a suppleness ratio of 1.0-0.85 mm, to impose a maximum natural pressure tension (7) at the transit in a depth of 1-2 mm under the deep rolled surface (8). A second roller, with a smaller radius (14), is dimensioned to give an additional plastic distortion (11) to the deep rolled surface.