METHOD AND DEVICE FOR ULTRASONIC DETECTION OF SURFACE DEFECTS SUCH AS CRACKS, FRACTURES AND THE LIKE ON A ROLLING MILL ROLLER

摘要

25 ABSTRACT METHOD9 DEVICE AND CIRCUIT FOR DETECTING SURFACE DEFECTS, SUCH AS CRACKS9 ERUPTIONS AND THE LIKE ON A ROLLER OF A ROLL MILL 5 A MPTHOD, A DEVICE AND A CIRCUIT ARE USED FOR DETECTING SURFACE DEFECTS SUCH AS CRAC,LKS, ERUPTIONS OR THE LIKE ON A ROLL (2) OF A ROLL MILL (1), IN PARTICULAR ON WOIKINQ ROLLS (2A) WHICH ARE MOUNTED WITH SUPPORTING ROLLS (2B) IN MILL HOUSING POSTS (3). THE ROLLS (2) CAN BE TESTED FOR DEFECTS IN THEIR OPERATING POSITION BY INTRODUCING THE ULTRASONIC TRANSVERSE WAVES (4A) THAT ARE GENERATED WITH A FREQUENCY OF 10 APPROXIMATELY 0.5-2 MHZ INTO A FIRST ROLL END (2C) AND RECEIVING THEM AT A SECOND ROLL END (2D), AND BY PRESSING AN ULTRASONIC WAVE TRANSMITTER (5) AND 311 ULTRASONIC WAVE RECEIVER (6) TIGHTLY FOR THE DURATION OF THE LEST AGAINST THE, ROLL SURFACE (2R-.) DUDNG THE MEASUREMENT PROCESS. SEE: FIGURE 3 2-