Metal working – Method of mechanical manufacture – Prime mover or fluid pump making
Patent
1993-10-18
1995-07-25
Cuda, Irene
Metal working
Method of mechanical manufacture
Prime mover or fluid pump making
29901, 74603, B23P 1500
Patent
active
054350590
ABSTRACT:
A balancing process for crankshafts that are assembled from a plurality of precisely machined, forged parts, in which the balancing process connects both revolving and reciprocating imbalances, allowing for optimum balancing conditions, which exceed the normal 50% balancing limit for weights that involve reciprocating unbalance. In this process, a substitute weight is positioned between two counterweight discs, that are part of corresponding sub assemblies of a temporary assembled crankshaft, with the substitute weight occupying the space normally occupied by the big end pin. The temporary assembled crankshaft, is placed on a dynamic balancing machine, and any imbalance is corrected. The connecting rod, prior to being assembled in the crankshaft, is balanced by placing the connecting rod on a weighing scale, that has been calibrated to zero position, using a master connecting rod of a known center of gravity. Necessary portions of the connecting rod are ground off, for correcting the error until the weighing scale readout returns to zero position. Once the connecting rod has been balanced, it is permanently installed with the big end pin as part of the fully assembled crankshaft.
REFERENCES:
patent: 4445399 (1984-05-01), Sasaki et al.
patent: 4779316 (1988-10-01), Cherry et al.
patent: 5000141 (1991-03-01), Sugano
Cuda Irene
Sylvester Bradley P.
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