Patent ID: 6836696
Filing Date: 2004-12-28
Classification: B21B,B21C

Abstract:
A method for marking material defects in and on rod-shaped rolled material upon exiting of the rolled material from the finishing rolling stand, in which the defects are detected in the course of the rolling process internally by means of ultrasound testing and externally by means of inductive testing, said information is supplied to a computer, the defects are identified and stored by the computer according to the type of defect and the location, and the computer controls a marking device with the help of said data in such a way that the rod-shaped, finished material is marked in the site determined by the computer according to the respective type of defect, wherein deformation steps located between the internal test and the external test are taken into consideration and defect detection and the marking command take place only after a pre-set time period dependent on rolling speed has elapsed from the start of the material test.