Deep rolling split-pin fillets of crankshafts

Details Deep rolling split-pin fillets of crankshafts Deep rolling split-pin fillets of crankshafts

1995-01-18

1996-11-19

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

72107, B21K 108

Patent

active

055751679

ABSTRACT:
Machine and method for deep rolling fillets of split-pins of engine crankshafts. Each split-pin comprises neighboring and arcuately offset crank pins connected between counter weights and has a centralized splitter fence which receives side loads from the connecting rods. Annular fillets are formed between the pins and opposite sides of the splitter fence as well as between the fillets and their associated counter weights. Limbs of the fillets at the splitter fence that describe the overlap of the split-pins are deep rolled with a high load for improving yield strength while the remaining arcuate portions of the fillets are rolled at lower loads to improve strength without undue distortion of the fence. The overlap of pin to main journals can also be rolled with increased load for increased yield strength.

REFERENCES:
patent: 4561276 (1985-12-01), Berstein
patent: 5001917 (1991-03-01), Berstein
patent: 5138859 (1992-08-01), Winkens
patent: 5333480 (1994-08-01), Berstein
patent: 5445003 (1995-08-01), Gottschalk et al.

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