SIGN DETECTION METHOD AND SIGN DETECTION DEVICE FOR STICK-SLIP PHENOMENON, AND COLD-DRAWING METHOD FOR PIPE USING THIS ADVANCE DETECTION METHOD.

摘要

[Problem] To provide a sign detection device that can detect signs of the stick-slip phenomenon. [Solution] A sign detection device (6) that detects signs of the stick-slip phenomenon in a drawing bench (1). This sign detection device (6) is equipped with: a load measurement unit (61) that measures the load applied to a plug support bar (4) in the elongation direction; a sign detection unit (62) that detects signs of the stick-slip phenomenon on the basis of the value for the load as measured by the load measurement unit (61); and a control unit (63). After drawing has begun, the load applied to the plug support bar (4) in the elongation direction is measured by the load measurement unit (61) during a predetermined period from a measurement start time to a measurement end time, and signs of the stick-slip phenomenon are detected by the sign detection unit (62) on the basis of the measured load value.