MEASURING THERMAL EXPANSION AND THE THERMAL CROWN OF ROLLS

摘要

Systems and methods for measuring the thermal crown of rolls in-situ (e.g., at high temperature) either inside or outside the rolling mill can include sensors that measure propagation times of mechanical waves through the rolls. In some embodiments, one or more sensors are used to measure the propagation times of ultrasonic waves traveling inside the roll and normal to the roll's axis. These measurements can be taken when the roll is still hot and can be used to determine in real-time the thermal expansion at various points along the roll.

主权项

1. A method comprising:
transmitting an in situ mechanical wave through a body at an in situ temperature; measuring an in situ propagation time of the in situ mechanical wave through the body at a first location; and comparing the in situ propagation time with a reference propagation time of a reference mechanical wave through the body at a reference temperature to determine an amount of thermal expansion of the body between the reference temperature and the in situ temperature.