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Mechanical analysis of fixtured tightening tools
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
KTH, School of Engineering Sciences (SCI), Solid Mechanics (Dept.), Solid Mechanics (Div.).
2018 (English)Independent thesis Advanced level (degree of Master (Two Years)), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

Tightening tools are used in many different branches of industry and are thus available in many different forms. One such form is fixtured tightening tools which are used in both robots and manual setups. Fixtured tools offer advantages in the form of automation and simultaneous tightening of multiple joints but also disadvantages in the form of the tightening tools being subjected to bending forces. The internal load of a tool due to this bending force is difficult to determine since a tool consists of many different parts while complex phenomena such as friction must be considered. The purpose of the work is to investigate the posssibility of developing a calculation model which is easy to use while having short execution time.In this investigation FE analysis is used as a reference for comparison of the calculation models. Two different types of calculation models are studied; a beam model and a regression model. The work of the beam model consists of studying the boundary conditions which best represent the behaviour of the FE model but also whether or not springs can be used to represent friction. The work with the regression model focuses on limiting the number of parameters which are varied in a design of experiments in order to achieve a regression model of good quality with a minimum number of analysis points.The results of these investigations show that a beam model is not suitable for representing the problem while a regression model yields partially good results but requires a large number of analysis points to provide satisfactory results for all areas of interest.

Place, publisher, year, edition, pages
2018. , p. 34
Series
TRITA-SCI-GRU ; 256
National Category
Applied Mechanics
Identifiers
URN: urn:nbn:se:kth:diva-232534OAI: oai:DiVA.org:kth-232534DiVA, id: diva2:1249040
Subject / course
Solid Mechanics
Supervisors
Examiners
Available from: 2018-09-18 Created: 2018-09-18 Last updated: 2018-09-18Bibliographically approved

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  • apa
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