Metal deforming – By use of closed-die and coacting work-forcer – Forcing work into or within closed die; e.g. – forging
Patent
1988-02-26
1989-01-17
Combs, E. Michael
Metal deforming
By use of closed-die and coacting work-forcer
Forcing work into or within closed die; e.g., forging
29157T, 72370, B21D 3100, B21D 2200
Patent
active
047980761
ABSTRACT:
The specification discloses extension nipple formation at acute angles on tubular engine exhaust manifold bodies for lap weld attachment of side runners. An articulated or single axis mandrel is inserted axially into the tubular body, each mandrel portion being in an angular body portion. Precut holes in the body are of oval shape. Laterally extensible forming dies are positioned in guide recesses in respective mandrel portions to be aligned with the precut holes and extensible at acute angles to the body and at an angle to each other. Drawing rods are extensible by transfer actuator cylinders into the dies where the rods are interlocked with the dies by rotary actuators. Power forming actuators then shift the rods and dies outwardly to form cylindrical nipples, the forming actuators temporarily overcoming the transfer actuators, and then returning the dies into the mandrel. The rods are then released from the dies and retracted, and the mandrel with dies withdrawn.
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Dehlinger James R.
Passmore David A.
Rigsby Donald R.
Benteler Industries, Inc.
Combs E. Michael
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