METHOD AND APPARATUS FOR PRODUCING STEPPED HOLLOW SHAFTS OR STEPPED CYLINDRICAL HOLLOW MEMBERS BY TRANSVERSE ROLLING
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United States of America Patent
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Issued Date -
Mar 5, 2009
app pub date -
Aug 29, 2008
filing date -
Aug 30, 2007
priority date (Note) -
Abandoned
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Abstract
The invention relates to a method and a device for transversely rolling stepped hollow shafts or cylindrical hollow parts from a pipe. The invention achieves the object of rolling stepped hollow shafts of the most varied dimensions and also of greater lengths in a flexible manner from a pipe using a small number of simple tools. In accordance with the invention, the object is achieved by virtue of the fact that rolling tools which can be radially advanced and are disposed in a planet-like manner around the workpiece are used to roll the contour of the transition from a central diameter in one portion of the workpiece to the central diameter in the adjacent portion by means of co-ordinated control of the radial advance of the rolling tools and the axial feed of the workpiece, and a mandrel head having an outer diameter which is adapted to the smallest inner diameter of the two portions is disposed underneath the rolling tools.
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