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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
11

Samverkanspelare i icke bärande fasadelement

Alamerison, Seif, Tarek, Karzan January 2009 (has links)
AbstractThe tests work is about the subject "synergism of steel and concrete." The construction sector is in a strong competition and the different companies in the Prefab Market has ever tried to develop new design solutions that are efficient and environmentallyfriendly. The purpose of this report is to highlight different aspects of interaction and size up a columndimension and to examine its efficiency and load capacity as Eurocode 3 and Eurocode 4. A sizing chart that describes the relationship between the torque and normal force shouldalso be made of the interaction .
12

Utveckling av gåbord

Eklind, Samuel January 2007 (has links)
No description available.
13

Konstruktion av en båtlift

Kostkevicius, Erik, Nikuolasson, Alfred January 2007 (has links)
Examensarbetet har utförts i samarbete med Produktutvecklarna AB i Växjö. Arbetet har varit att konstruera en båtlyft för fritidsbåtar, med en vikt på maximalt 1000 kg. Lyften skall kunna lyfta båten ifrån en båttrailer, och den skall kunna användas som vinterförvaring, Den skall också kunna lutas 30 grader för att underlätta tvättning och underredsbehandlig. Arbetet innefattar konstruktion, hållfasthetsberäkningar, materialval, simuleringar samt dimensioneringar av lager och hydraulkolvar.
14

Smörjning Av Lager / Lubrication Of Bearing

Ahlman, Per-Arne January 2009 (has links)
The work thesis was performed at Assalub a company which is situated in Åtvidaberg. The company works with developing, manufacturing and marketing equipment for handling of lubricants for light and heavier industry. The work thesis it is based on a inquiry Assalub got from MacGregor which is a company within cargo solution, from port to offshore system. For unloading grain and other material from the ship cargo it is used combined inlet feeder and screw conveyor, there the inlet feeder is drilling down through the cargo and feed the screw conveyer with material to further destination. At the bottom of the screw conveyer and the inlet feeder there is a bearing that keep the parts together. However the lubrication of the bearing must be made manually. Until now the bearing was lubricated manually through a grease nipple from the bottom of the drill once a day.   The purpose of the thesis was the construction of a lubricating system namely a pump with a grease container which should be placed inside the space of the screw conveyer, so the bearing will be continually lubricated and able to work several days without any stoppage. After receiving drawings and operating data for the screw conveyer, the details for the construction was designed in CAD system Solid Edge. The solid mechanics calculations on the weakest point on the construction was made by hand and afterwards the drawings for respectively details was made. The construction was completed, but because of the time limit for this work thesis, the manufacturing, mounting and testing were not included in these weeks. The grease containers capacity is approximately seventy-two hours, although desirable should be up to seven days. According to the solid mechanics calculations, the construction should have no problem to resist the stresses it would be exposed to. Since this is a prototype there is probably some adjustments and improvements to do, but the estimating is that the system should work properly as it is now.
15

Arrestor Hook för JAS 39 Gripen

Nåhdin, Rickard January 2010 (has links)
SAAB AB är intresserad av att kunna utrusta JAS 39 Gripen med en "Arrestor Hook" då denna typ av nödbromssystem är vanligare i andra flygvapen än det system som svenska flygvapnet använder. Uppgiften var att göra ett konstruktionsförslag av denna "Arrestor Hook" bom och krok för kommande arbete. För att göra detta förslag valdes att dela upp arbetet i fyra steg, faktainsamlig, konceptframtagande, konceptval och bearbetning. Valet av vilka detaljer som skulle ingå i förslaget var böjd bom med med fast krok. På kroken monterades en släpsko för att underlätta fångandet av vajern och att tjäna som den detalj som skyddar kroken från slitage som uppstår mellan "Arrestor Hook" och banbeläggning. För att tillgodose alla krav på rörlighet som behövs på "Arrestor Hook" utrustas den med en leddetalj som ger tvåfrihetsgrader vilket även ger ett mindre moment på konstruktionen när vajern är fångad. Resultatet av den teoretiska analysen av de fyra förslagen visar att alla de uppsatta kraven kan mötas, dock behövs mer utvärdering och tester för att säkerställa detta. Ytterligare litteratur kring tillvägagångssättet att konstruera "Arrestor Hook" bör också tillföras för fortsatt arbete.
16

Konstruktion av snabbkoppling för elektropolering.

Hurley, Daniel, Johansson, Carl January 2010 (has links)
No description available.
17

Design and analysis of a large transportable vacuum insulated cryogenic vessel

Munoz Alonso, Carlos, Unda Garcia, Alejandro January 2010 (has links)
This project has been undertaken by Alejandro Unda García and Carlos Muñoz Alonso for Veprox AB (www.veprox.se), a Swedish engineering company, in collaboration with the School of Technology and Society at the University of Skövde (www.his.se). This thesis represents the final project for the Bachelor Degree Exam in Mechanical Engineering during the academic year 2009-2010. To achieve this project, we were helped and supported by Peter Höglund, Veprox AB Office Manager; Tomas Walander, Supervisor and M. Sc. student and Karl Mauritsson, Examiner and Lecturer, both belonging to the Department of Mechanical Engineering at the School of Technology and Society of the University of Skövde. This project is aimed to study, design and analyze a large transportable vacuum insulated cryogenic vessel that will be attached to a truck in order to keep, maintain and transport by road liquid methane at a temperature of -162 °C. Considerations such as different pressure loads, dimensions, materials as well as their mechanical properties, constraints, masses, insulation systems and weather-environmental conditions (Northern Europe) are made in the mechanical analysis. Furthermore, calculations and dimensions satisfy the requirements given by the Swedish Standards Institute (S.I.S) following the standards SS-EN 13530-1: Cryogenic vessels - Large transportable vacuum insulated vessel; Part 1: Fundamental requirements and SS-EN 13530-2: Cryogenic vessels - Large transportable vacuum insulated vessel; Part 2: Design, fabrication, inspection and testing. The CAD software Pro/Engineer Wildfire 4.0 is used to visualize the models for the chosen designs. In addition, the finite element module Pro/Mechanica is used to obtain results of mechanical analyses in order to determine if the stresses are within margins.
18

Eurocodes : Beräkningsjämförelser mellan eurocodes och BKR

Källung, Patrik, Staaf, Pontus January 2008 (has links)
In the year 2010 a transition will take place here in Sweden from the present rules how to dimension buildings in to the common rules with have been developed in Europe, the Eurocodes. Eurocode is the term for a collection standard that contains calculation rules in how to dimension constructions and buildings. They are developed by the European standardize committee. The purpose with this examination work is to get an insight of what changes this will contribute to, and how it will affect the dimensioning. Are there going to be any differences in the dimension you finally chose? To investigate these possible differences two constructions will be calculated first in the present Swedish rules, and then in the coming eurocodes. One of these two constructions will be build completely in steel, while the other will be build completely in concrete. The steel building will have a beam and a column dimensioned, the concrete building will likewise have a beam and a column dimensioned. To reach as equivalent comparison as possible will the same load, geometry and circumstance prevail for both standards. Limitation has been done to only dimensioning the beam and the column who is most charged. After we performed the calculations we could make the conclusion that dimensioning with Eurocode a higher efficiency was received, a 10 % higher efficiency on the materials. The strength of the material is with calculations with Eurocode higher, and so are the loads. One of the reasons for this is that the securityclass is added to the loads in Eurocodes and are drawn off from the strength of the materials in BKR. / År 2010 kommer en övergång att ske i Sverige från de nuvarande reglerna att dimensionera bärverk enligt BBK till de gemensamma reglerna som tagits fram i Europa de så kallade Eurocodes. Eurokoder är benämningen på en samling standarder som innehåller beräkningsregler för dimensionering av bärverk till byggnader och anläggningar. De tas fram av den europeiska standardiseringskommittén. Syftet med examensarbetet är att skapa en överblick om vilka förändringar detta kommer att leda till och hur detta kommer att påverka dimensionering av bärverk samt om det kommer att bli några skillnader i vilken dimension man slutligen väljer. För att komma fram till skillnaderna mellan de två olika standarderna så kommer två byggnader att dimensioneras, Byggnaderna kommer först att dimensioneras enligt de nuvarande reglerna enligt BBK, därefter så kommer samma beräkningar göras enligt de nya reglerna enligt eurocodes. Byggnaderna som kommer att dimensioneras kommer att bestå av två material antingen bestående av stål eller betong. Byggnaden bestående av stål kommer att ha balk och pelare i stål och den andra byggnaden kommer att ha en pelare och balk bestående av betong. För att få en så likvärdig jämförelse som möjligt mellan de två olika standarderna så kommer samma typ av laster och förhållanden att verka på elementen. Begräsningar har gjorts att bara dimensionera den mest belastade balken respektive pelaren. Efter att vi utfört beräkningarna drog vi slutsatsen att vid dimensionering enligt Eurocode erhålls en 10 % högre utnyttjandegrad av materialet än vi dimensionering enligt BKR.   Generellt vid beräkningarna så blir hållfasthetsvärdena större för Eurocode, kompenserande blir då också lasten större. En anledning till detta är att säkerhetsfaktorn läggs på lasten i Eurocode och reducerar kapaciteten i materialet för BKR. / Beräkningsanalyser
19

Design of an End Effector for Drilling in Automated Processes

Åman, Robin January 2006 (has links)
In an attempt to solve a problem concerning drilling, a project was started at the universities in Linköping and Lund. As a part of the project this thesis aims to help solve the drilling problem. The goal of this thesis is to design an end effector that will help avoid slipping when drilling. The methods used were taken from David G. Ullman’s book The Mechanical Design Process. Members involved in the project were interviewed to get an understanding of the task. With that done the concept generation phase began, resulting in several concepts. With the use of evaluation methods, such as feasibility judgment and Go/No-Go screening, a final concept emerged. All of the parts and details of the concept were designed with respect for the customers’ requirements and demands.
20

Design and analysis of a large transportable vacuum insulated cryogenic vessel

Munoz Alonso, Carlos, Unda Garcia, Alejandro January 2010 (has links)
<p>This project has been undertaken by Alejandro Unda García and Carlos Muñoz Alonso for Veprox AB (www.veprox.se), a Swedish engineering company, in collaboration with the School of Technology and Society at the University of Skövde (www.his.se). This thesis represents the final project for the Bachelor Degree Exam in Mechanical Engineering during the academic year 2009-2010.</p><p>To achieve this project, we were helped and supported by Peter Höglund, Veprox AB Office Manager; Tomas Walander, Supervisor and M. Sc. student and Karl Mauritsson, Examiner and Lecturer, both belonging to the Department of Mechanical Engineering at the School of Technology and Society of the University of Skövde.</p><p>This project is aimed to study, design and analyze a large transportable vacuum insulated cryogenic vessel that will be attached to a truck in order to keep, maintain and transport by road liquid methane at a temperature of -162 °C.</p><p>Considerations such as different pressure loads, dimensions, materials as well as their mechanical properties, constraints, masses, insulation systems and weather-environmental conditions (Northern Europe) are made in the mechanical analysis. Furthermore, calculations and dimensions satisfy the requirements given by the Swedish Standards Institute (S.I.S) following the standards <em>SS-EN 13530-1: Cryogenic vessels - Large transportable vacuum insulated vessel; Part 1: Fundamental requirements and SS-EN 13530-2: Cryogenic vessels - Large transportable vacuum insulated vessel; Part 2: Design, fabrication, inspection and testing. </em></p><p><p>The CAD software <em>Pro/Engineer Wildfire 4.0</em> is used to visualize the models for the chosen designs. In addition, the finite element module Pro/Mechanica is used to obtain results of mechanical analyses in order to determine if the stresses are within margins.</p></p>

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