Process and device for shaping the end of a tube with an oblong cross-section to a circular cross-section
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United States of America Patent
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Jun 18, 1996
Grant Date -
N/A
app pub date -
Oct 26, 1994
filing date -
Oct 29, 1993
priority date (Note) -
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Abstract
A process and device for shaping the end of a tube with an oblong cross-section to a circular cross-section, where the shaping occurs in a single radial compression stage from the exterior. The tube is disposed with its shortest axis in correspondence with two fixed opposite surfaces, having a circular profile with a radius of curvature which is approximately equal to the radius of the circular section of the tube which is to be obtained. A radial compression is then exerted along the longest axis of the oblong section of the non-deformed tube by a pair of shaping surfaces having an angular extension which is complementary to those of the fixed opposite surfaces.
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