Precursor detection method and precursor detection device of stick-slip phenomenon, and method for cold-drawing pipe or tube using precursor detection method
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United States of America Patent
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Sep 11, 2018
Grant Date -
Mar 26, 2015
app pub date -
May 2, 2013
filing date -
May 16, 2012
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Abstract
A precursor detection device 6 detects a precursor of a stick-slip phenomenon in a drawing machine 1. The precursor detection device 6 includes a load measurement section 61 for measuring a load applied to a plug support bar 4 in the drawing direction, a precursor detection section 62 for detecting a precursor of a stick-slip phenomenon based on a load measurement value measured by the load measurement section 61, and a control section 63. After drawing is started, a load applied to the plug support bar 4 in the drawing direction is measured by the load measurement section 61 during a predetermined period from a measurement start point to a measurement end point, and based on the measured load measurement values, a precursor of a stick-slip phenomenon is detected by the precursor detection section 62.
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