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Development and Validation of Threaded Fastener Test Rig
Luleå University of Technology, Department of Engineering Sciences and Mathematics.
2019 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Threaded fastener is one of the most common ways to join components. Having a method to test threaded fasteners is key when designing a joint and even more a nutrunner. A joint is often tightened by a torque applied on the head. The applied torque is equal to three quantities in the joint, the thread torque, the underhead torque and the clamp force. To measure these quantities are the propose of a friction test rig. A test rig was built last year to be able to do that in a flexible and effective way. But the test rig built last year does not have the possibility to measure the underhead torque. A new transducer is constructed to add that possibility. The transducer is constructed by using methods such as concept generation, strength calculations, FEM simulations and a comparison of sensors are made. An easy way to change the stiffness is also investigated but no possible solution could be found. Some modifications and trims are also done on the test rig and also a comparison with the older BLM rig. A validation is made of how good the rig perform is also done. The results shows in favour for the FTR but precise results is not possible to determine.

Place, publisher, year, edition, pages
2019. , p. 49
Keywords [en]
Threaded, Fastener, Joint, Test, Rig, Friction, Bolt, Screw, Thread, Transducer, Sensor, Gauge, Strain
National Category
Mechanical Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-74502OAI: oai:DiVA.org:ltu-74502DiVA, id: diva2:1324615
External cooperation
Atlas Copco
Educational program
Mechanical Engineering, master's level
Examiners
Available from: 2019-06-18 Created: 2019-06-14 Last updated: 2019-06-18Bibliographically approved

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
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  • de-DE
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  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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Output format
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