Essays about: "Ultrasonic preload"
Found 4 essays containing the words Ultrasonic preload.
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1. Classification of ultrasonic signals using machine learning to identify optimal frequency for elongation control : Threaded fastening tools
University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)Abstract : Studying the preload in a screw joint has been the focus of today’s industry. The manufacturer reflects that demand by investigating different opportunities and techniques to develop this area. There are four different ways of controlling the tightening of bolts and joints to achieve the required clamp force that can hold for a specific preload. READ MORE
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2. Simulation of ultrasonic time of flight in bolted joints
University essay from KTH/HållfasthetsläraAbstract : Ultrasonic measurements of the preload in bolted joints is a very accurate method since it does not depend on the friction and other factors which cause difficulties for common methods. The ultrasonic method works by emitting an ultrasonic pulse into the bolt which is reflected at the end and returned to the transducer, the change in the time of flight (TOF) can be related to the elongation of the bolt and therefore the preload. READ MORE
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3. Simulation and Analysis of Ultrasonic Wave Propagation in Pre-stressed Screws
University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknikAbstract : The use of ultrasound to measure preload in screws and bolts has been studied quite frequently the last decades. The technique is based on establishing a relationship between preload and change in time of flight (TOF) for an ultrasonic pulse propagating back and forth through a screw. READ MORE
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4. Ultrasonic measurement and analysis of screw elongation
University essay from KTH/Hållfasthetslära (Avd.)Abstract : Based on the customers' increasing demands on the precision of the preload in a screw joint Atlas Copco is investigating the opportunity to integrate ultrasonic technologies in their industrial tools in order to be able to measure the screw elongation and thereby preload. The preload in a screw joint is important when trying to optimize the joint in terms of weight and life time. READ MORE