Processing method for a connecting rod

Internal-combustion engines – Transmission mechanism from piston – Crankshaft and connecting rod

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2988809, F02B 7532

Patent

active

059185759

ABSTRACT:
A method of manufacturing a connecting rod for a piston engine in which the inner surface of the small hole of the connecting rod is milled to produce a multifaceted surface which includes two deep spot faces along each edge of the small hole and two tapered faces. This milling step yields thin edge regions along each edge of the small hole to serve as a process reference hole with process reference planes. The final step, according to the method of this invention, is to remove the thin edge regions with a rotating cutting tool, thus exposing the tapered faces to serve as chamfered edges without any significant production of burs or distortion of the connecting rod.

REFERENCES:
patent: 1847742 (1932-03-01), Anderson
patent: 2031173 (1936-04-01), Miller
patent: 2502737 (1950-04-01), Meley et al.
patent: 2533822 (1950-12-01), Lee et al.
patent: 3932053 (1976-01-01), Hack
patent: 4191238 (1980-03-01), Pichl
patent: 5353500 (1994-10-01), Hoag et al.
patent: 5544413 (1996-08-01), Stevens et al.

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