How Traditional Measurement Techniques in Continuous Casting and Rolling Can Exhibit Perfect Ovality Yet Fail Circularity Criteria
Continuous casting and rolling (CCR) applications utilize multi-stage rolling trains to downsize and shape metal into circular rods. Modern rolling trains typically include a roughing mill and a finishing mill.
The roughing mill is responsible for roughly shaping the rod and providing substantial downsizing. The finishing mill is responsible for the final downsizing and shaping of the rod. The shape is checked using measurement devices such as laser micrometers or vision systems. These techniques are bi-symmetrical in nature, which can lead to inaccurate measurement and hidden geometry issues.