DEVICE FOR DETERMINING MEAN THICKNESS OF TUBE WALL Russian patent published in 1996 - IPC

FIELD: rolled stock production. SUBSTANCE: device includes an additional pickup of hot tube blank motion, arranged before a reduction rolling mill, units for division by a factor two, a control system of information to be tracked in a first delay unit in dependance upon a half-sum of speed motion values of portions of the tube blank, corresponding to boundaries of tracking zones. Using of an additional unit for detecting intermill elongation of the tube blank and of a unit for detecting a cross seam, creates reasons for high-quality control of a thickness of the tube wall in a zone of negative allowance. EFFECT: enhanced accuracy of determining a mean thickness of tube blank wall. 1 cl, 2 dwg