Ultrasonic flaw detection inspection of backup rolls (also called support bearings) is a commonly used non-destructive testing method for detecting defects or damage within support rollers. This method detects possible defects by sending ultrasonic signals into the interior of the support roller and then receiving the reflected signals back. Here are the general steps of the process:
Preparation: Make sure the support roller is in the proper position for inspection. Clean the surface of the support roller to ensure smooth propagation of ultrasonic waves.
Ultrasonic sensor placement: Placing an ultrasonic sensor (also called a probe or transducer) on the support roller surface usually requires the use of couplant to ensure good contact between the sensor and the support roller surface.
Signal transmission: Ultrasonic signals are sent to the inside of the support roller through the ultrasonic sensor. These signals pass through the support roller and are reflected when encountering internal defects.
Signal reception: Receive ultrasonic signals reflected by internal defects. These signals will be captured by ultrasonic sensors and converted into electrical signals.
Signal Analysis: The received signal is analyzed to determine whether there are internal defects. Analysis may involve comparing signal strength, time delays, and other characteristics.
Result evaluation: Based on the analysis results, evaluate whether the support roller meets specific safety standards or quality requirements. If defects are found, further inspection or repair is required.
Recording and reporting: Document inspection results and generate reports including any defects found, their location and severity. These records and reports are critical for maintenance and quality control.
