Metal deforming – By use of roller or roller-like tool-element – With tool inside hollow work
Patent
1989-12-22
1991-05-21
Spruill, Robert L.
Metal deforming
By use of roller or roller-like tool-element
With tool inside hollow work
72 42, 72256, 72370, 72371, B21B 2500
Patent
active
050164600
ABSTRACT:
The method of the invention produces a method for fabricating a metal tube that contains at least 30 wt % nickel and 10 wt % chromium. The invention utilized an elongated mandral having an oversized diameter and oversized land portions. The oversized land portions project radially outward from the mandrel and extend longitudinally along the mandrel. The valley portions are located between the land portions and extend longitudinally along the mandrel. Oversized diameter internally finned tubing is formed with the mandrel. The oversized diameter internally finned tubing is sent to a finished diameter. The sinking reduces radial spacing between the fins and elongates the oversized diameter internally finned tubing without substantially reducing the height of the fins.
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England Jimmy C.
Hensley John R.
Moehling Frederick E.
Roberts Everett M.
Ruble, Jr. Hugh-Hiram
Biederman Blake T.
INCO Alloys International, Inc.
Mulligan, Jr. Francis J.
Spruill Robert L.
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