Apparatus for fillet rolling of crankshafts

An apparatus for simultaneously deep fillet rolling multiple crankshaft main and pin bearings to increase the fatigue strength thereof, comprising:

• a frame;
• support means on the frame for supporting and rotating a crankshaft in a working position;
• a plurality of pin rolling means for deep rolling the pin fillets of the crankshaft;
• pin mounting means for movably mounting the pin rolling means on the frame for movement between an engaging position, where the pin rolling means engage the crankshaft for rolling, and a retracted position, where the pin rolling means are shifted away from the crankshaft;
• a plurality of main rolling means for deep rolling the main bearing fillets of the crankshaft;
• a slidable carriage means slidable on the frame and carrying the main rolling means between an engaging position, where the main rolling means engage the crankshaft for deep rolling main fillets, and a retracted position, with the main rolling means spaced from the crankshaft;
• and
• a cross carrier means for carrying the main rolling means in a direction parallel to the rotational axis of the crankshaft.

An apparatus for deep rolling of fillets on pin and main bearings of a crankshaft, the apparatus comprising:

• a frame;
• a plurality of pin and main rolling means on the frame;
• means mounting the pin and main rolling means for movement into a rolling position for rolling engagement with the crankshaft and for movement to a spaced position spaced away from the crankshaft to allow the crankshaft to move laterally in a direction parallel to axis of rotation of the crankshaft;
• a rotational support means on the frame for rotating the crankshaft while a first set of pin and main bearings are being engaged and rolled by the pin and main rolling means;
• and
• translation means on the frame for translating the rotational support means and the crankshaft thereon in a direction parallel to crankshaft axis while the pin and main rolling means are in the spaced position to align a second set of pin and main bearings with the rolling means for rolling subsequent to the rolling of the first set of pin and main bearings.

An apparatus for simultaneously deep fillet rolling multiple crankshaft main and pin bearings to increase the fatigue strength thereof, comprising:

• a frame;
• support means on the frame for supporting and rotating a crankshaft in a working position;
• the support means including positioning means for moving the crankshaft axially relative to the main rolling means and the pin rolling means to sequentially position groups of the crankshaft main bearings and pins relative to the main rolling means and the pin rolling means for sequential deep rolling of the groups;
• a plurality of main rolling means for deep rolling the main bearing fillets of the crankshaft;
• main mounting means for movably mounting the main rolling means on the frame for movement between an engaging position, where the main rolling means engage the crankshaft for deep rolling, and a retracted position, where the main rolling means are positioned to expose the crankshaft and the working position for operations other than rolling;
• a plurality of pin rolling means for deep rolling the pin fillets of the crankshaft;
• pin mounting means for movably mounting the pin rolling means on the frame for movement between an engaging position, where the pin rolling means engage the crankshaft for rolling, and a retracted position, where the pin rolling means are positioned to expose the crankshaft and the working position for operations other than rolling;
• the main mounting means including a carriage guided perpendicular to the rotational axis of the crankshaft along guide means mounted to the frame for said movement reciprocal between the engaging position and the retracted position;
• the pin mounting means including a carriage guided perpendicular to the rotational axis of the crankshaft along guide means mounted to the frame for said movement reciprocal between the engaging position and the retracted position;
• the frame including upper support members and lower support members;
• the main mounting means mounting the main rolling means to the lower support members;
• the pin mounting means mounting the pin rolling means to the upper support members;
• the pin rolling means including slide means and pivot means for guiding the pin rolling means to follow the oscillation of the pins as the crankshaft is rotated with the pin rolling means engaging the crankshaft;
• the slide means including a carriage guided on the frame for movement of the pin rolling means perpendicular to the rotational axis of the crankshaft in the working position;
• the pivot means including strut rigidly mounted to the carriage;
• and
• the strut including a pivot to allow pivoting movement of the pin rolling means.