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Thin-Walled Niobium-Titanium Capillaries: Online Monitoring Technology

The "Quality Gatekeeper" of Thin-Walled Niobium-Titanium Capillaries. When the wall thickness of niobium-titanium capillaries reaches below 0.1mm, traditional offline inspection methods are no longer sufficient to meet quality requirements. If inspection is conducted after processing is complete, any problems discovered could result in the scrapping of the entire batch. In this situation, online monitoring technology becomes an indispensable "quality gatekeeper" in thin-wall processing, enabling the transition from "after-the-fact remediation" to "real-time prevention."

Currently, the industry's mainstream online monitoring equipment is the laser thickness gauge, which transmits a laser beam through the tube and calculates the wall thickness based on changes in the beam's refraction and reflection. This device's advantage lies in its extremely fast response speed, capable of collecting 200 sets of data per second, enabling it to detect even the smallest fluctuations in wall thickness during processing. For example, a 0.1% deviation in roll pressure can be detected within 0.005 seconds by the laser thickness gauge and transmit the signal to the control system.

In addition to laser thickness measurement, some high-end production lines also incorporate infrared temperature monitoring and stress detection sensors. The former monitors the temperature changes of the tube in real time during processing to prevent overheating and changes in material properties; the latter monitors the stress distribution within the metal to prevent the risk of cracking caused by stress concentration. This multi-dimensional online monitoring system jointly builds a quality defense line for thin-walled niobium-titanium capillaries.