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Dissertations / Theses on the topic 'Spot joining'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Miller, Christopher Carl Edward. "The joining of advanced high strength steels using resistance spot welding." Thesis, Swansea University, 2008. https://cronfa.swan.ac.uk/Record/cronfa42252.

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Weight reduction of the automotive body-in-white structure is increasingly necessary to improve fuel efficiency and reduce the carbon emissions and environmental impact of motor vehicles. This must be achieved without compromising the strength of the body-in-white structure. Steel manufacturers are continuing to develop advanced high strength steels (AHSS) which not only exhibit high strength and excellent energy absorbing characteristics but also retain a comparable degree of formability to low alloy grades. The specific properties of advanced high strength steels such as dual phase and TRIP

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2

Siemssen, Brandon Raymond. "Development and Characterization of Friction Bit Joining: A New Solid State Spot Joining Technology Applied to Dissimilar Al/Steel Joints." Diss., CLICK HERE for online access, 2008. http://contentdm.lib.byu.edu/ETD/image/etd2425.pdf.

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3

Roos, Rollin M. "3-D temperature distributions in spot heating of a ceramic by a focused microwave source." Thesis, This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-09182008-063008/.

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4

Joesbury, Adam Michael. "New approaches to composite metal joining." Thesis, Cranfield University, 2015. http://dspace.lib.cranfield.ac.uk/handle/1826/10009.

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This thesis explores new methods for achieving load-carrying joints between the dissimilar materials of continuous fibre reinforced polymer matrix composites and structural metals. The new composite-to-metal joining methods investigated in this work exploit the metal-to-metal joining techniques of arc micro-welding, resistance spot welding, and metal filler brazing, to form novel micro-architectured metal adherends that can be used for enhanced composite-to-metal joining. Through a combination of equipment instrumentation and metallographic inspection of fabricated prototype joints, understand

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5

Goushegir, Seyed Mohammad [Verfasser], and Sergio de Traglia Amancio [Akademischer Betreuer] Filho. "Friction spot joining of metal-composite hybrid structures / Seyed Mohammad Goushegir. Betreuer: Sergio de Traglia Amancio Filho." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2015. http://d-nb.info/1080864431/34.

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6

Goushegir, Seyed Mohammad [Verfasser], and Sergio [Akademischer Betreuer] Amancio. "Friction spot joining of metal-composite hybrid structures / Seyed Mohammad Goushegir. Betreuer: Sergio de Traglia Amancio Filho." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2015. http://nbn-resolving.de/urn:nbn:de:gbv:830-88213377.

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7

Manente, André Natália [Verfasser]. "Mechanical integrity and corrosion behavior of metal-composite hybrid joints produced with Friction Spot Joining / Natália Manente André." Hamburg : Universitätsbibliothek der Technischen Universität Hamburg-Harburg, 2020. http://d-nb.info/1219141526/34.

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8

Al-Jader, Mohamad Aqeel. "Investigation of spot welding electrode tip wear and a non-destructive test of plastic joining in the automotive industry." Thesis, Liverpool John Moores University, 2014. http://researchonline.ljmu.ac.uk/4445/.

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The automotive industry is reliant on resistance spot-welding just as the sandwich making industry is reliant on bread. An automobile contains an average of 5000 welds. The quality of these welds is inspected and governed by certain standards. In order to maintain these standards there are different approaches to quality control. There are many factors that are accountable to a successful weld. The main factors are the voltage across the electrodes, the pressure applied by the electrodes at the interface of the metal sheets, the current applied, the surface condition and the composition of the

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9

Fredriksson, Daniel, and Göransson Milou Carlfors. "Evaluation of Shunt Distancein Resistance Spot Welding." Thesis, KTH, Materialvetenskap, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-277903.

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The purpose of this study was to generate a greater understanding of how the shunt distance affects the shunting phenomena which occurs when working with resistance spot welding (RSW). Shunting affects the quality of the weld and the goal of the study was to create guidelines for RSW to minimize its impact on the weld quality. In order to minimize waste from production and to reduce the welding time there is need for understanding of what the shunt effect depends on. To evaluate what impact the shunt distance will have on the weld, two different experiments were performed. In the first experim

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10

Al-Zubaidy, Basem. "Material interactions in a novel Refill Friction Stir Spot Welding approach to joining Al-Al and Al-Mg automotive sheets." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/material-interactions-in-a-novel-refill-friction-stir-spot-welding-approach-to-joining-alal-and-almg-automotive-sheets(ccf8ed1d-e468-4a6c-b90e-ca868d3349e0).html.

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Refill Friction Stir Spot Welding (RFSSW) is a new solid-state joining technology, which is suitable for joining similar and dissimilar overlap sheets connections, particularly in aluminium and magnesium alloys. This welding method is expected to have wide applications in joining of body parts in the automotive industry. In the present study, RFSSW has been used to join 1.0 mm gauge sheets of two material combinations: similar AA6111-T4 automotive aluminium alloy joints and a dissimilar aluminium AA6111-T4 to magnesium AZ31-H24 alloy combinations. The performance of the joints was investigated

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11

André, Natália Manente. "Friction spot joining of aluminum alloy 2024-t3 and carbon-fiber-reinforced polyphenylene sulfide composite laminate with additional pps film interlayer." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/8275.

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Submitted by Alison Vanceto (alison-vanceto@hotmail.com) on 2016-10-21T11:41:37Z No. of bitstreams: 1 DissNMA.pdf: 5169564 bytes, checksum: 024c06d911b0aca7d5ad498353cc25ef (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:38:42Z (GMT) No. of bitstreams: 1 DissNMA.pdf: 5169564 bytes, checksum: 024c06d911b0aca7d5ad498353cc25ef (MD5)<br>Approved for entry into archive by Marina Freitas (marinapf@ufscar.br) on 2016-11-08T18:38:48Z (GMT) No. of bitstreams: 1 DissNMA.pdf: 5169564 bytes, checksum: 024c06d911b0aca7d5ad498353cc25ef (MD5)<br>Made avail

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12

Dang, Weidong. "Finite element modelling of hybrid (spot welded/bonded) joints under service conditions." Thesis, Compiègne, 2015. http://www.theses.fr/2015COMP2187/document.

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Le soudage par point et le collage sont largement utilisés dans la jonction des tôles, telles que l'assemblage de caisses de voiture. Récemment, le soudage par point et le collage ont été combinés pour faire le joint hybride soudé-collé, qui est utilisé pour joindre les aciers à hautes résistances et améliorer la rigidité et la résistance aux chocs des corps de voiture. Dans l'industrie, l'évaluation de la conception avant prototype nécessite des modèles fiables de comportement en termes de prédiction des comportements mécaniques. Le modèle élément finis de joint soudé-collé est un nouveau déf

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13

Gardner, Rebecca. "An Experimental Investigation of Friction Bit Joining in AZ31 Magnesium and Advanced High-Strength Automotive Sheet Steel." BYU ScholarsArchive, 2010. https://scholarsarchive.byu.edu/etd/2159.

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Friction Bit Joining (FBJ) is a recently developed spot joining technology capable of joining dissimilar metals. A consumable bit cuts through the upper layer of metal to be joined, then friction welds to the lower layer. The bit then snaps off, leaving a flange. This research focuses on FBJ using DP980 or DP590 steel as the lower layer, AZ31 magnesium alloy as the top layer, and 4140 or 4130 steel as the bit material. In order to determine optimal settings for the magnesium/steel joints, experimentation was performed using a purpose-built computer controlled welding machine, varying factors s

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14

Weickum, Britney. "Friction Bit Joining of 5754 Aluminum to DP980 Ultra-High Strength Steel: A Feasibility Study." BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2789.

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In this study, the dissimilar metals 5754 aluminum and DP980 ultra-high strength steel were joined using the friction bit joining (FBJ) process. The friction bits were made using one of three steels: 4140, 4340, or H13. Experiments were performed in lap shear, T-peel, and cross tension configurations, with the 0.070" thick 5754 aluminum alloy as the top layer through which the friction bit cut, and the 0.065" thick DP980 as the bottom layer to which the friction bit welded. All experiments were performed using a computer controlled welding machine that was purpose-built and provided by MegaSti

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15

Verástegui, Roger Navarro. "Estudo de uniões dissimilares alumínio-soldas por "Solda Ponto por Fricção e mistura mecânica com preenchimento do furo" (Friction Spot Welding - FSpW)." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61398.

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O presente trabalho estuda uniões entre chapas de aço DP600 e chapas das ligas de alumínio AA 6181–T4 e AA 5754–H22, obtidas através do processo Friction Spot Welding (FSpW). A soldagem de materiais dissimilares é um dos grandes desafios para a engenharia, pois as propriedades de distintos materiais são muito diferentes na maioria das vezes, o que dificulta a realização deste tipo de união pelos métodos convencionais de soldagem com fusão. O processo FSpW requer menos energia que os processos de soldagem convencionais, não produz fumos, radiação ou resíduos. Permite obter a união de materiais

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16

Esteves, João Victor Almeida. "União pontual por fricção (“friction spot joining”) de alumínio 6181-T4 com compósito laminado de poli(sulfeto de fenileno) e fibra de carbono (CF-PPS)." Universidade Federal de São Carlos, 2015. https://repositorio.ufscar.br/handle/ufscar/7345.

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Submitted by Izabel Franco (izabel-franco@ufscar.br) on 2016-09-20T18:30:12Z No. of bitstreams: 1 DissJVAE.pdf: 4217973 bytes, checksum: 5bff49bb1884d56f5cb1d7e47edfd24f (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-21T18:13:46Z (GMT) No. of bitstreams: 1 DissJVAE.pdf: 4217973 bytes, checksum: 5bff49bb1884d56f5cb1d7e47edfd24f (MD5)<br>Approved for entry into archive by Ronildo Prado (ronisp@ufscar.br) on 2016-09-21T18:13:57Z (GMT) No. of bitstreams: 1 DissJVAE.pdf: 4217973 bytes, checksum: 5bff49bb1884d56f5cb1d7e47edfd24f (MD5)<br>Made available in

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17

Berka, Miroslav. "Návrh změny technologie spojování součástí pro specifické účely." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2017. http://www.nusl.cz/ntk/nusl-316876.

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The main goal of the diploma thesis is a proposal of alternative metal sheets joining technology which would replace the current technology of spot welding. Different variants have been proposed, and the one which suits the most, the technology of clinching, was compared to the existing one. The costs have been calculated and following results have been concluded: the return of investment of clinching press is about 2 years. In the case of handheld tongs it is 1 and a quarter of a year. Annual savings of clinching press are 234 485 Kč, and in the case of handheld tongs are 258 019 Kč.

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18

Sarmento, Alisson Alves. "União de chapas de aço por conformação a frio: análise da resistência mecânica sob carga multiaxial." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/3/3151/tde-22032012-114824/.

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Este trabalho visou entender e avaliar a resistência mecânica da junção de chapas de aço obtidas pelo processo de União de Chapas por Conformação a Frio (UCCF). Esse processo é conhecido no meio industrial pelo termo em inglês: clinching ou press joining. O formato de união cilíndrico, também conhecido como Round, foi selecionado para unir os corpos de provas. As uniões metálicas ensaiadas foram fabricadas com aço de baixo teor de carbono sem camada superficial de proteção (170MPa de limite de escoamento). O material escolhido é de comum utilização na indústria automotiva. Duas espessuras dife

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19

Knutsson, Erik. "Development of a Highly Flexible Geometry Station for Versatile Production Systems in Automotive Body Construction : A Station designed for Joining of Body-in-White Assemblies duringan Integration of Electric Vehicles." Thesis, KTH, Industriell produktion, 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232578.

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The research in this report seeks to develop a highly flexible geometry station for joining futureBody-in-White (BiW) assemblies. The goal is to eliminate the need for a complete reconstructionof a production line during integration of new car bodies in a contemporary production.Today's BiW production is performed in sequential lines, where joining equipment is arranged ina specific order for each model geometry. An increasing model portfolio forces manufacturers todevelop production systems that allow an integration of new models. Electrified alternatives ofexisting models are now developed a

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20

Liu, Ju-Jen, and 劉如真. "A study of joining mechanism on Al Alloy A6061-T6 Friction Stir Spot Welds." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/69945937789904205260.

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博士<br>國立臺灣科技大學<br>機械工程系<br>100<br>Friction stir spot welding (FSSW) is a derivative process of the friction stir welding (FSW), which is a solid-state joining technique, due to the process temperature below the melting point, so it therefore does not exit porosity, solidification cracking and other defects generated by traditional fusion welding. It is especially suitable for magnesium, aluminum and other light metal alloys. Results showed that, the construction of the transient constrained space is a prerequisite to the formation of a stirring area and the bonding of the welding work pieces.

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21

Chang, Yao-Chi, and 張堯棊. "A study on the joining properties of ductile iron and stainless steel by friction stir spot welding." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/74094370478053361566.

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碩士<br>國立臺灣師範大學<br>工業教育學系<br>100<br>Friction stir spot welding is another solid-statebonding technique deri- ved from friction stir welding, the process temperature which is below the melting point of the base material can be avoided defects resulting from melting, it is suitable for joining dissimilar materials and difficu- lt materials. Ductile iron has been widely used in many engineering structures, due to excellent mechanical properties, good casting and low-cost. Ferrite stainless steels have been used in some severe corrosion environment for its corrosion resistance which is mo- re super

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22

Oliveira, António José Faria de. "Study on weldability of similar aluminium alloys by friction spot welding." Master's thesis, 2016. http://hdl.handle.net/10316/38919.

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Dissertação de Mestrado Integrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra.<br>The objective of the present work is to access the weldability of a similar configuration of AA5454-H22 by Friction Spot Welding, test the strength of the weld in different configurations and analyse the parameters that contribute to the behaviour of the joint under different types of loading. The welds were produced in Lap-Shear and Cross-Tensile configuration for static loading experiments and Fatigue samples were also produced to characterize the performa

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23

Tutunjian, Shahan. "Ultrasonic Spot Welding of Thin Walled Fibre-Reinforced Thermoplastics." 2020. https://tud.qucosa.de/id/qucosa%3A75561.

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Das Ultraschall-Punktschweißen von faserverstärkten thermoplastischen Kunststoffen hat in der letzten Zeit bei Forschern in der Luftfahrt- und Automobilindustrie großes Interesse hervorgerufen. Es bietet eine effiziente Lösung zum Verbinden großer thermoplastischer Verbundbauteile durch Punktschweißen mit einem hohen Automatisierungsgrad. In der vorliegenden Arbeit wurde eine neue Technik zum Fokussieren der Ultraschallschwingungsenergie an der gewünschten Fügestelle zwischen zwei Fügepartnern aus thermoplastischen Verbundlaminaten untersucht. Bei diesem untersuchten Verfahren waren keine zusä

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24

Cheng, Chun-Hu, and 鄭淳護. "A Study on the Nugget Forming and the Reliability Analysis of Joining Strength for 1050-O Pure Aluminum by Resistance Spot Welding." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/13886892162129564742.

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碩士<br>國立臺灣師範大學<br>工業教育研究所<br>90<br>Because of the properties of 1050 aluminum alloy close to pure aluminum, it has good thermal conductivity and formability. For the 3C industries requiring for strict thermal conductivity, the use of pure aluminum or aluminum alloys will be more and more popular and so be the jointing technology of resistance spot welding. As far as the resistance spot welding of aluminum alloys, the method of joint still needs to be improved. Due to the expensive cost of the kinetic-energy machines, the single-phase welding machines are still the major in the marke

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25

郭致誠. "A study on the Jointing Condition and the Reliability Analysis of Tensile-Shear Strength for 6063-T5 Aluminum Alloy by Resistance Spot Welding." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/02759059989030888307.

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碩士<br>國立臺灣師範大學<br>工業教育研究所<br>90<br>Due to the requirement of lightweight, aluminum alloy has been applied extensively in 3C/information and automotive industry. And the resistance spot welding is the key technique at the jointing method of aluminum alloy sheet, the advantages of resistance spot welding are its short process, high speed, adaptability for automation and flat welding piece. Because of its high electrical as well as thermal conductivities and lower melting point, aluminum alloy needs high current, accurate control of welding time, acceptable welding pressure to match up

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