Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent
1987-06-17
1989-09-19
Spruill, Robert L.
Metal deforming
By use of roller or roller-like tool-element
With tool inside hollow work
291211, 29132, 72209, 72214, B21B 2102, B21B 2500
Patent
active
048669687
ABSTRACT:
Pilger tooling for use in a pilgering machine includes an elongated stationary mandrel for supporting a tube thereon in position for cold reduction, and a pair of roller dies positioned along opposing sides of the mandrel and in oppositely-facing relation to one another for coacting with the mandrel in reducing the cross-sectional size of the tube. Each roller die is ring-shaped with a central opening for mounting the die on a shaft and has a keyway defined therein adjacent the central opening for receiving a key to secure the die for movement with the shaft. The keyway also provides a timing mark for accurately mounting the die on the shaft. Each roller die has two relief pockets formed in the periphery thereof in circumferentially spaced apart relation with a bridge extending therebetween, and a tube-reducing groove formed in the periphery thereof having a tapered configuration and opening at its opposite ends into the respective pockets. The end of one of the relief pockets is disposed radially outwardly from and aligned with the center of the keyway so as to provide a reference point on the die adjacent the periphery thereof. Each of the mandrel and roller dies are fabricated from a high strength cemented carbide material which is composed of tungsten carbide ranging from about 81.5 to about 86 percent by weight and cobalt ranging from about 14 to about 18.5 percent by weight.
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Cady Albert B.
Cellier Francis
Katz Steven B.
Spruill Robert L.
Westinghouse Electric Corp.
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