Chapter 3 - Rolling of metals
Chapter 3 - Rolling of metals
Chapter 3 - Rolling of metals
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Thickness measurement in continuous<br />
cold strip mills<br />
• Thickness is measured by x-ray<br />
gauges while the error in the<br />
thickness following the first stand is<br />
usually fedback to adjust the gap<br />
sitting on the first stand.<br />
• Gauge control in subsequent stands<br />
usually is achieved by controlling the<br />
strip tension through controlling the<br />
relative roll speed in successive stands<br />
or the coiler speed.<br />
• Gauge control through control <strong>of</strong><br />
strip tension has faster response<br />
time than control through change in<br />
roll setting.<br />
sensors<br />
Thickness gauging is achieved<br />
by using two opposing<br />
sensors with laser spots<br />
aimed at opposite sides <strong>of</strong> a<br />
target. The sensor readings<br />
are subtracted from the sensor<br />
separation distance to yield a<br />
real-time thickness<br />
measurement.<br />
Suranaree University <strong>of</strong> Technology Tapany Udomphol<br />
Jan-Mar 2007