System for manufacturing connecting rods

Details System for manufacturing connecting rods System for manufacturing connecting rods

1987-03-11

1988-07-05

Yost, Frank T.

Severing by tearing or breaking

Breaking or tearing apparatus

Movable breaking tool

29252, 74579E, 225 2, B26F 300

Patent

active

047549068

ABSTRACT:
A two part tool fits into the crankshaft bore of a partially manufactured connecting rod for an internal combustion engine and expands the bore to break the bore housing into two pieces, one of which comprises a bearing cap to permit installation of the rod onto a crankshaft journal. The tool is retracted to fit within the bore for the bearing and a high pressure acts on a piston to provide a high enough force to move two parts of the tool away from each other in direction perpendicular to a bisecting plane that lies along the central axis of the bore and to split the one piece bearing housing into two parts along a place defined by notches which weaken the bearing housing in selected areas. The piston is centered on the bisecting plane of the connecting rod so that the forces are balanced to ensure uniform, repeatable operation. The movement (displacement) of the tool portions and the load on the tool portions are both sensed for control of the test, and also to permit obtaining data on load and displacement relationships for quality control of the parts.

REFERENCES:
patent: 1630759 (1927-05-01), Pierce, Jr.
patent: 3727599 (1973-04-01), Sugiki et al.
patent: 3994054 (1976-11-01), Cuddon-Fletcher, et al.
patent: 4094181 (1978-06-01), Westberg
patent: 4569109 (1986-02-01), Fetouh
patent: 4684267 (1987-08-01), Fetouh
patent: 4693139 (1987-09-01), Mukai et al.

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