Method for calibrating tubular articles
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United States of America Patent
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Jul 20, 1982
Grant Date -
N/A
app pub date -
Apr 10, 1981
filing date -
Apr 15, 1980
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An apparatus for calibration of tubular articles, especially cylinder linings for internal combustion engines, manufactured through isostatic compression of pulverulent metallic materials, comprises piston means for effecting an axial displacement between the tubular article and a mandrel which it surrounds during the calibration. Preferably, the tubular article is first subjected to a rather modest radial inwardly directed pressure which is increased after an axial relative movement between the mandrel and the tubular article has taken place.
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