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494 Uppsatser om Additive manufacturing - Sida 20 av 33
UTVECKLING AV BESLAGSSYSTEM FÖR SANDWICHPANEL : Ett designprojekt i samarbete med Paroc Panel System AB ®
En av Parocs produkter är sandwichpanel som är ett byggmaterial som kan variera i storlek och tjocklek och är funktionellt och smidigt. Uppdraget var att designa ett beslag för panelsystem som minst 50% av Paroc Panel Systems kunder skulle föredra framför de gamla, främst med avseende på estetiken, men även baserat på lätthet att montera och kostnad av beslaget. Projektet skedde i samverkan med företaget Paroc Panel System AB och ur förundersökningen framkom att utseende, monteringsmöjligheter, egenskaper såsom materials livslängd och hållfasthet och totalkostnad var viktiga krav som ställdes på produkten. Lösningsförslag med fokus på flera viktiga aspekter togs fram och kombinerades till olika koncept med hjälp av en så kallad morfologisk tabell. En konceptutvecklingsfas ingick där hållfasthetsberäkningar och materialval var avgörande.
Tvärvetenskaplig undersökning av textil Broderiet från Tämta kyrka
There are several objects of age whose provenance and history has disappeared with time. The purpose of this thesis is to find out which analyzing methods that gives results and how the different methods can be combined and /or established in each other. The investigations centers around an embroidery, belonging to Tämta church, with unknown origin, use and age. The embroidery is long and narrow with applications in the form of dragons and eagles on a ground of velvet cloth. The dragons and eagles are covered with metal threads.
Askdeponi i bergrum : Metoder för slurrytillverkning
This thesis work has been carried out at the consultant company Pöyry Sweden AB in Norrköping, whom performs the task for E.ON heating Sweden AB, Händelöverket in Norrköping. The report shows methods to manufacture slurry consisting of fly ash and water. The slurry shall be pumped into several former oil storage rock shelters that E.ON has put into operation for the specific purpose. The ash mixture also develops hydrogen gas in contact with water.The work has aimed to produce different suggestions of methods and equipment that can be used for the objective. Mixing method and security issues were in centre while working with the suggestions.
Utveckling av barnvagn
After contacting the company Elite Group Sverige AB, who sells strollers under the brand Crescent Baby, it was determined that the project group were to develop a three wheeled stroller which was going to be Crescents first own developed stroller. Only the frame of the stroller was considered within the demarcation of this project however care was taken to the placement of the carry-cot and the wheels etc. Crescent Baby wished for the frame would be smaller than the competitor Urban Jungle, that the frame would have at least three unique selling points and that the number of unique parts was to be minimized. The work began with information seeking regarding strollers, competitors, independent tests, European standards and consumer interviews. After that a number of concepts were developed and past to Crescent.
Omvärldsanalys och dess inverkan på strategiutformandet i svenska verkstadsföretag
The ability for companies to anticipate the future and stay in the forefront of the competition is essential for successful business. The tool of Environmental Scanning is basics in the process of developing prescriptive strategies as well as vital in evolving emergent strategies. The complexity lies in gathering relevant information and transforming the information into adequate data, which can be utilised by management to optimise strategies. The purpose of this study is to scrutinise how successfully operating Swedish manufacturing companies, listed on the Stockholm Stock Exchange?s ?Large Cap?-list, organise their Environmental Scanning actions and how this affects the development of strategies.
Prior research on the subject has been used as foundation to presenting relevant theories.
Parameterstudie av inneslutningsbildning och utvärdering av processföring för tillverkning av plastformsstål
This thesis has been performed at Uddeholms AB with the purpose to investigate theparameters affecting the formation of inclusions during the manufacturing of a low carbonmanganese-steel.A follow-up, steel and slag sampling and evaluations in microscope have been done for a totalof five heats.The results for each heat have been evaluated in relation to the theory from the literaturesurvey and suggestions for changes in the process to reduce the amount of inclusions whichhave a negative effect on the steel quality have been given.The project extends over a large process where many parameters affect the formation ofinclusions. However, a tendency that a higher addition of alloys seems to increase the totalamount of inclusions before and after the vacuum degassing is seen.The majority of the studied inclusions seem to approach the composition of the top slag aftervacuum degassing. Ladle glaze may cause the inclusions which had a different compositioncompared to that of the slag.A high or low ladleage together with a high argon flow during vacuum degassing seems todissolve particles from the refractory which later on get trapped inside the inclusions.The floatation for two heats has been studied where a short floatation seems to give a higheramount of inclusions in casted material.In machined material so called stringers were found. The main composition of those stringerswas pure alumina. Inclusions with a composition of pure alumina were not found in the liquidsteel, thus the pure alumina inclusions must be formed during the casting.
Uppfyller BIM förväntningarna som arbetsmetod för broprojekt?
The purpose of this work is to design and construct a device able to measure the mechanical attrition of oxygen carrier particles. Those particles are used in chemical looping combustion and in the present situation there is a lack of knowledge in how the attrition process work and in which extension. To find already tested solutions trying to answering this problem a literature study wascarried out and the best solution found was the so called Grace-Davison Jet-Cup method. This method is supposed to emulate the attrition caused by a cyclone separator and its advantages are that it is possible to use small test amounts, 5-10 g, and a thirty minutes long test will be enough to acquire useable results. An device was designed based on the Jet-Cup method with some slight modifications.
Utveckling av högspänningskontakt
This report describes the development of a high-voltage connector at the request of Scandinova Systems AB in Uppsala. The development process is described from the making of a customer demand specification, to the making of drawings for the manufacturing of prototypes. Scandinova develops high-voltage modulators, hence the need for connectors that can handle very large power pulses. Their current connector has several weaknesses that may cause the connector to melt or catch fire. The development began with a number of studies that included the modulator structure and the current connector structure and functions.
Användning av nyckeltal, Key performance indicators, som underlag till resurseffektivisering av produktion
Mattias MogardGustav von HeijneSammanfattningFör framgångsrika företag är det essentiellt att ha kontroll över sina resurser. Studien tar upp ett ämne som handlar om att skapa en överblick och en medvetenhet om resurseffektivitet inom ett företags produktion.Performance measurement är ett tillvägagångssätt för att kvantifiera aktiviteterna inom en produktion. Data struktureras genom nyckeltal, Key performance indicators (KPI:er), till övergriplig och användbar information. ISO 22400 är en uppsättning standardiserade nyckeltal med ändamålet att appliceras på automatiserad produktion. Studiens syfte är hitta vilka av nyckeltalen från ISO 22400 som är lämpliga att använda vid mätningen av en helt automatiserad produktionskedja som tillverkar motorblock.
Kvalitetssäkring för Scaniasmotorkomponenter : Jämförelse med andra företag
Quality assurance for Scania engine componentsScania engines have become one of the world?s most renowned corporations in themanufacturing of engines. This is mostly due to the quality and performance thatScania have shown. However, this does not stop Scania from trying to achieve moresuccess in the fields of development and research to assure the quality of theirengines.The purpose of this thesis is to show how Scania ensures the quality of the enginecomponents, both those who made externally and internally at Scania, also inclusivethe manufacturing and assembly process.Three engine components were examined: D16 block engines, water pump andXP-Iinjectors. The study included the whole process from the step of supplying therow materials to the last step in production functional test.In this thesis an investigation of how other companies are working with qualityassurance was conducted.
USA: s militära intervention i Irak : En studie av hur Bushadministrationens agerande överensstämmer med FN stadgan
AbstractUniversity of Växjö, School of Social SciencesCourse: POC 536, Political Science 41-60Title: The U.S. military intervention in Iraq ? A study of how the intervention corresponds with the UN CharterAuthors: Andreas Malmgren & Johan SchneiderSupervisor: Lennart BergfeldtDate: 2006-09-26The aim of this essay is through a qualitative literature study examine the main arguments of the Bush administration to justify a military intervention in Iraq. The theories used to explain the actions of the U.S. are system level analysis, hegemonism and realism while the UN Charter will be applied as a normative theory.
Konstruktion av anordning för att undersöka förslitning av syrebärarpartiklar för kemcyklisk förbränning
The purpose of this work is to design and construct a device able to measure the mechanical attrition of oxygen carrier particles. Those particles are used in chemical looping combustion and in the present situation there is a lack of knowledge in how the attrition process work and in which extension. To find already tested solutions trying to answering this problem a literature study wascarried out and the best solution found was the so called Grace-Davison Jet-Cup method. This method is supposed to emulate the attrition caused by a cyclone separator and its advantages are that it is possible to use small test amounts, 5-10 g, and a thirty minutes long test will be enough to acquire useable results. An device was designed based on the Jet-Cup method with some slight modifications.
Standardisering av bakpanel.
HAFA Bathroom Group has given us the assignment to develop a standardized back panel for their bathroom cabinets. This cabinet is going to be applied to most of their current and future cabinet solutions. To this point, they have constructed unique suspensions-and back panels for most of their cabinet models. They have also been forced to pull wiring and assemble the cabinets differently because of factors like; position of the wall sockets, dimensions of the cabinets and their shapes.The company wants to distance themselves from their current solution, firstly because the cost of having manpower to design each individual suspension solution, secondly because they will save a lot of money when the manufacturing process requires a minimum of components to be constructed. As a result of this, the company can use their resources better to develop future products.The main idea is that the consumer isn?t required to change the suspension or back panel when they decide to buy a new cabinet.
TV-stativ med nytt ställdon
The purpose of this thesis work is to evaluate how the physical behaviour of a pipe bend is affected by the pipe bending procedure. Effects such as initial ovalization, thinning, thickening and plastic hardening from the bending procedure are examined and the mechanical properties of pipe bends containing these effects are investigated.This has been evaluated by creating a detailed Finite Element model of a pipe that is being bent. Then the differences compared to a bent tube in a virgin state, so called Elbow elements and an analytical in-house program have been evaluated. The virgin state refers to a model of a pipe that is bent from the beginning, thus having a homogeneous thickness and not containing any plastic hardening. The Elbow element is a calculationally cheap element, specially developed for accurate calculations of pipe bends in an initially virgin state.The goal with the thesis work is to get a better picture of what happens to a pipe as it is being bent, how this affects the mechanical properties and to evaluate the possibility to develop an easy method for taking these effects into account when using the Elbow element.This report describes the layout of the work and how the detailed FE-model has been constructed.
Ett gårdsbesök : ger besöket någon kunskap om mjölkproduktion?
Aquatic organisms are usually not exposed to single substances but rather to mixtures of toxicants in streams located in agricultural areas. The transport of pesticides used in the agricultural area in Sweden is monitored with continuous environmental supervision every year. During 2002-2008 an average of 10 pesticides were found in each sample and 40% of the samples contained substances with concentrations higher than the Water Quality Standards. Chemical risk management is normally based on single-test evaluations. A problem when assessing mixture toxicities is that the constituents and concentrations of pollutants in the environment vary greatly.