Sök:

Sökresultat:

2129 Uppsatser om Mechanical construction - Sida 42 av 142

Konstruktion av solcellsstativ i obehandlat naturmaterial

I detta examensarbete utvecklas ett solcellsstativ i trämaterial. Ett idékoncept fanns somgrund för hur stativet skulle kunna utformas. Detta har vidareutvecklats, till färdigt systemanpassat för tillverkning.Resultatet blev ett fackverksstativ i trä bestående av vinklade halva oktaeder i rad.Trädetaljerna binds samman med knutpunkter i formsprutad plast, som med klämkraft hållerfast trädetaljerna. Knutpunkterna är konstruerade för att minimera åverkan på träet samtmotverka röta.Systemet är verifierat både genom beräkning, simulering och jämförelse med liknandekonstruktioner. Materilavalet är gjort med systematik enligt Ashby, Material Selection inMechanical Design.

Discourse analysis of the swedish integration politics

This essay is a discourse analysis of the integration politics of the different parties in the Swedish parliament and the non-parliamentary party ?the Swedish Democrats?, as it is presented on their respective web pages. The overall purpose is to problematize and shed a light on how the current discourse(s) about integration are constituted. Also of interest is how these construct our knowledge and experience of the phenomena. We furthermore want to illustrate the social consequences of such discourses on the construction and organization of identities and groups, and, as a result, the courses of action that becomes available.

AUTOMATISERING AV KAPMASKIN

Weland AB är ett familjeföretag som startade 1947 med sitt huvudkontor i Smålandsstenar. Här finns ungefär 250 anställda som jobbar på ca 60 000 kvadratmeter. Ryggraden i Welands verksamhet är tillverkning av pressvetsad gallerdurk som går att se i konstruktioner som trappor, både spiral och raka.Projektet grundar sig i att ljudnivån vid en maskin för kapning av gallerdurk är hög och därför har personalomsättningen också varit hög. Syftet med projektet är att konstruera komplement till en kapmaskin för att göra den helautomatisk. Det skulle göra att en operatör inte behöver vara närvarande mer än för att förse maskinen med material, programmera maskinen och bortföra pallar med färdigt gods.

Oxygen Health : Inlösning av syre i vatten

The project has been provided by Zenit design group and the goal for this project was tomanufacture and perform tests of a prototype that supersaturates water in a continuous flow ofwater. The project has involved finding and sorting out relevant data in scientific papers, books,communication with foreign manufactures and other platforms for information.The project has resulted in manufacturing of a test rig and an oxygen infuser based onmembrane technology. The test rigs purpose was to perform tests on oxygen infusers fordifferent comparison test and performance benchmarks in a in a laboratory provided by Zenit.The project led to satisfying results using the oxygen infuser manufactured by the authors withcomparable levels of saturation to the reference infuser.The theory behind this project is based on medical research, belonging terms will be explainedbut the authors have chosen to delimit the project from the medical area. The reason for this islack of knowledge in this area and its irrelevance to the mechanical engineering education insuch..

Upprustning av miljonprogrammet (ur energisynpunkt)

Målet med detta arbete är att undersöka och analysera en byggnad från miljonprogrammet i Helsingborg göra gällande energiberäkningar. Dessa beräkningar ska mynna ut i olika förslag till hur man skulle kunna styra upp en renovering av dessa byggnader så att de uppfyller de nya energikraven samt skapa en mer tilltalande estetisk byggnad..

Fuktproblematik i platta på mark : En analys av uppkomsten till fuktproblem

When constructing a building, a number of aspects must be harmonized in order for it to fulfill requirements ? a building must fulfill requirements such a load-bearing, conservation of energy and a good indoor environment by means of, among other things, moisture proofing .Moisture problems in buildings can affect health negatively. As we are increasingly staying in indoors, demands on a good indoor environment are higher.This work starts with examining moisture problems in slab-on-ground solutions, and then links the various scenarios to moisture problems in a concrete slab of a real building. The building with moisture problems is located in Årby by in Borlänge and moisture damage was found in the slab at an apartment adjoining wall.By reviewing literature written within the field of moisture problem, making hand calculations and modeling in the program Comsol Multiphysics, judgments are made to find explanations as to why the rise of moisture occurred in the building in Årby by.Generally, the following guidelines may be used to reduce the risk of moisture problems in slab-on-ground constructions:Drying of construction moisture before laying the floor material.Using draining layer beneath the slab, to prevent capillary suction.Using insulation under the slab, partly for comfort and to establish the temperature difference between the ground and the concrete slab.Avoid direct contact between the wood and concrete, due to degradation and fouling smells that normally occurs.If necessary, use additional vapor barrier.In addition to the above, there are various methods for moisture-proof and moisture-monitoring by design or by the method ByggaF suited for the entire construction process various events..

Identity Construction of Young Professionals in a Late Modern Emotion-Intensive Context: Multiple Faces of Family Discourse in a Big Four Auditing Firm

Purpose: The purpose of this thesis is to study the adaptation of recently recruited young professionals to a top consulting firm through their identity construction efforts. We analyze the influence of a major organization-related discourse on young professionals in order to account for the effects of emotional labor on their adaptation to work. Methodology: We have studied our empirical material in the light of a reflexive pragmatic approach. Thus throughout the analysis of interview material, we try to interpret carefully the material from various perspectives. As authors, we also reflect critically upon our own interpretations.

Effektivisering av kravspecifikationsprocessen

The goal of this project was to make the requirement process at the Swedish Coastguard more effective. The first step to achieve this was done by locating bottle necks in the process with value stream mapping method. The result of this study showed that the biggest restriction in the requirement process was while examining older requirement documents to understand what elements were suitable for the particular project. This was followed by a study of literature, interviews and theory of Lean Production with the ambition to investigate how the requirement process was handled on other companies and how to improve the process on the Swedish coast guard. This led to a number of potential enhancements of the process which later was evaluated. Requirements written by different people in different organizations were analyzed in order to sort out if there were some similarities? which could be used as standard elements in a future standardization of the process.

Värdefull eller värdelös? - Kulturhistorisk värdering och färjestationen i Helsingborg

This essay in historical archaeology deals with cultural-historical values of buildings and inthis case the old train- and ferrystation in Helsingborg. The building has from the day of itsopening in 1898 been exposed to threats of demolition since its original purpose was as atemporary building with intension of being replaced within a couple of years. After havingseen two World Wars, eventhough Sweden never participated, and the ferrytraffic with its upsand downs the station was an important part of Helsingborg. All the ferrytraffic over the straitto Denmark was handeled by the old train- and ferrystation untill 1955, when a competativeferrycompany was built close to the old station. After a hundred years of service the oldstation was closed down when a new station was built i Helsingborg in 1991 with theintension of gathering all travelers in one building.

Nyttjande av ofrörbrukat byggmaterial : En rapport åt Peab Jönköping

This final year project is made for Peab Jönköping and its target group is the construction industry. The main focus is the use of unutilized building material in the most economical and environmental-friendly way. Unutilized building material is here defined as material purchased for a construction project that for different reasons not has been used. The most important thing to find out was how much building material considered as being waste is actually useable material, and how much less it costs to use that building material instead of throwing it away.When this information was gathered a proposal on how to efficiently use the unutilized building material instead of wasting it was designed. Costs and incomes were investigated and the proposal suggested a storage area where Peab can store their unused building material.

Solenergi på Kvarnholmen

In recent years it has become more and more evident that man has contributed to much of the climate changes that have taken place during the last century. A major challenge today is to reduce emissions and energy usage at the same time as the global population is growing. To contribute to a better environment, Stockholms Stad has set at target of becoming fossil fuel free by the year of 2050. The construction of new districts is done with this goal in mind; energy efficiency and renewable energy sources are examples of methods to achieve this.Solar energy is considered to be a sustainable energy source and the most common techniques to harvest solar energy in Sweden are solar cells and solar collectors which produce electricity and heat respectively. This report aims to investigate whether an investment in any of these systems would prove to be economically beneficial at Kvarnholmen, a district under construction in eastern Nacka, Stockholm.Since the finished blueprints only cover a small portion of Kvarnholmen, the report examines the possibilities for a house where construction has already begun, Nya Kvarnen.

Finns det lönsamhet i att bygga hyresrätter i Karlstad? : Kan kostnaderna minska om man bygger enligt passivstandard?

This thesis is basically a design project aimed to find a safe and reliable automatic safety device, which is designed to be suitable for highly automated industrial situations. This device fits with ABB / Jokab Safety?s fence systems. These are built up around machines to create safety distances. The automatic protection device assist the operator in situations when loading or going in and out of the danger zone.

Utveckling av rattstång med övre teleskopfunktion

I denna rapport redogör projektgruppen för resultatet i kursen examensarbete 15hp (C-nivå) utfört på maskiningenjörsprogrammet, inriktning produktutveckling och design, vid Jönköpings Tekniska Högskola.Examensarbetet har utförts i samarbete med Kongsberg Power Product Systems AB i Ljungsarp. Syftet var att utveckla en ny typ av övre teleskopfunktion till Kongsbergs modulsystem för ställbara rattstänger.Utgångspunkten i projektet var att skapa en mer ergonomisk förarmiljö, något som Kongsbergs kunder och marknaden för långsamtgående fordon allt mer efterfrågar. Kraven som ställts på projektet bestod i största del av axiella och radiella krafter som konstruktionen skulle klara av, samt den axiella förlängningen av rattstången.För att strukturera arbetet har en produktutvecklingsmetod från boken The Mechanical Design Process av David G. Ullman använts. Dessa metoder har använts i genomförandefasen för att leda fram till resultatet.Projektet har resulterat i ett koncept som löser Kongsbergs krav på förbättrad förarergonomi..

Moderna trä- och betongstommar i flerbostadshus : En teknisk jämförelse av ett fyravåningshus med två stomalternativ.

Målet med detta arbete var att belysa skillnaderna mellan ett fyravåningshus med trä- respektive halvprefabricerad betongstomme ur ett tekniskt perspektiv för att utröna vilket stomalternativ som är att föredra.Faktorer som belystes var:Tjocklekar på bärverksdelarLängsta möjliga spännvidderInstallationsmonteringElementmonteringGrundstorlekLjudisolerande förmågaRisk för fuktskadorBranddimensioneringProjekteringskomplexitetBygghandlingar från ett befintligt flerbostadshus med trästomme erhölls och analyserades, och ett hus med likvärdig stomme av betong projekterades.Bärverket med halvprefabricerad betong dimensionerades efter rådande Eurokoder och detaljer utformades enligt gällande lagar och regler samt erkänd branschstandard.Ur de tekniska perspektiv som avhandlats i denna rapport väger fördelarna med betong något tyngre än träalternativets fördelar trots att egenskaperna i vissa hänseenden är mycket lika.Betongalternativet ger stora fördelar vad gäller brand och ljud och är samtidigt enklare att projektera, medan trä har sina fördelar i montering och grundläggning. Att välja en stomme av trä till ett flerbostadshus verkar också ha fördelar i de icke avhandlade aspekterna, t.ex. miljö och arbetsmiljö.För att uppfylla ljud-, brand- och fuktkrav i ett trähus krävs det avancerade byggsystem som innebär stor komplexitet i projekteringen vilket kräver ett nära samarbete mellan träprojektör och fabrikör. .

Ombyggnad av flerbostadshus : Hur påverkas hyresgästerna av  en ombyggnad

During the years 1950-75 was the construction of building apartments in high speed. A rapidly growing reconstruction requirement is the consequence of the rapid construction speed in these years. The technical lifetime of the different parts of the buildings is about to end and the needs for reconstruction is huge. One of Sweden's national environmental objectives is to reduce the urge of energy in buildings. This calls for radical measures to implement energy efficiency of existing assistance particularly in the assistance that is now facing reconstruction.

<- Föregående sida 42 Nästa sida ->