Engine crank pin rolling equipment, rolling tool and method of rolling adjacent and offset crank pins

摘要

Arcuately offset pairs of juxtapositioned pin journals of an internal combustion engine crankshaft have their fillets pressure rolled for fatigue strengthening by opposing inclined rollers carried in cages at the lower ends of a pair of relatively rotatable tool housings supported in a side-by-side relationship by a pair of jaws of floating clamping structure. This structure allows the rollers to follow the crank pin journals as the crankshaft is being turned so that arcuately offset crank pin fillets can be simultaneously pressure worked and strengthened. Opposing roller reaction loads are cancelled at load receiving bearings operatively interposed between the pair of tool housings.