PROCESS FOR PRODUCING A ROTATIONALLY SYMMETRIC HOLLOW PART AND HOLLOW PART PRODUCED THEREBY
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United States of America Patent
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Issued Date -
May 30, 2013
app pub date -
Nov 12, 2012
filing date -
Nov 13, 2011
priority date (Note) -
Abandoned
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Abstract
A process for producing a rotationally symmetric hollow part, especially a shaft, including: providing a bar-shaped solid material involving the steps of heating the solid material substantially to forging temperature; cross wedge rolling of the solid material so as to cause weakening in the core zone of the solid material; and inserting at least one rotating mandrel, driven at a predetermined velocity, substantially along the central axis of the cross-wedge-rolled solid material, thus creating a through-hole and to a rotationally symmetric hollow part, especially a shaft.
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