Today small metal parts are mass-produced as for example rollers in cylinder bearings. At high velocity cutting the metal is cut with a great force in a scissor-like device. Both precision and repeatability is important to be able to guarantee good quality, but from an economical point of view it is also important to keep a great manufacturing capacity. The part of the process that is most time consuming is when the metal bar, that is about to be cut, is fed to the right position. Therefore it is interesting to examine if the time used for positioning can be reduced.

Examensarbetet har genomförts på Campus Norrköping, Linköpings Universitet. Nätkursen och nätduggorna är ett samarbete mellan Linköpings Universitet (LiU), Kungliga Tekniska Högskolan (KTH) och portalen MATH.SE.Målet med samarbetet är att skapa och underhålla en webbsida (http://webcourses.itn.liu.se) i kursen Linjär algebra. Detta samarbete har skapats för att öka studenters intresse och öka deras inlärning i detta ämne. Anledningen till att dessa program behövs inom Linjär algebra är att det är svårt att förklara begrepp i tre dimensioner eller mer på en tvådimensionell tavla.Syfte med examensarbetet var att skapa en webbsida, som ökar förståelsen hos studenter som läser Linjär algebra. Med webbsidan skulle studenterna själva kunna interaktivt visualisera de moment i kursen som kan vara svåra att undervisa i ett klassrum.

Metso Paper offers a front-running range of solutions and services for the pulp and paper industry. At the baling unit, design solutions are developed for manufacturing and handling of pulp bales. The machines are continuously developed to satisfy customer needs. One big step in the development of the baling line was to remove hydraulics from the machines and replace it with electrical motors and pneumatics. This was not done on the folding machine which is still driven by mainly hydraulics.

Swedish agriculture has gone through big changes in the latest 60 years. The farm sizes have increased, which has led to raised tractor and machinery sizes and therefore increasing problems with soil compaction. A method to reduce these problems is to implement controlled traffic farming, CTF. All field operations are then concentrated to specific tracks by using GPS guidance. The aim of this work was to study how the tillage regime, with or without CTF, affects the soil, with the main focus on macroporosity. In Säby close to Uppsala, and Alnarp close to Malmö, randomized block trials has been carried out, and the data has mainly been taken from these trials.

Flooding events are no longer rare, floods occur all over the world. Accordingly, it is vital for the society and different authorities to work with flood mapping. To meet the goal of Uppsala kommun to map the risks of floods in Uppsala län, a map of the different areas around Funboån which are inside the area of risk for flooding have been developed.In the work, cross sections and the water flow have been measured. Moreover, an echo-sounding have been carried out in Funboån to map the bottom topography. From the bottom map and laser scanned data covering the study area, a terrain model was created.

Syftet med examensarbetet är att ta fram en modell för torsionssvängningar i systemet vevaxel, motortransmission och kamaxeln på SCANIA's 12 liters dieselmotor DC1201. Det höga gastrycket och injektortrycket på SCANIA's dieselmotorer ger upphov till stora moment på både vevaxeln och kamaxeln. Dessa moment varierar kraftigt med tiden och skapar torsionssvängningar hos de båda axlarna samt hos motortransmissionen. Modellen som presenteras är linjär och av frekvens respons typ, den beskriver förloppet i fortvarighet. Axlarna och transmissionen är diskretiserade med totalt 37 frihetsgrader.

The purpose of the thesis was to map the hydraulic load on the Knivsta river from stormwater runoff, and build a platform for further studies of pollution loads on the rivers ecosystems. New residential areas are planned to be built in Knivsta municipality and it will have an impact on stormwater flows to Knivsta river. To examine the impact this will have, simulations were made in the area as it stands today and after expansion work. The work includes calculation of flows from the populated areas but also from the catchment area around it consisting of woodlands and fields. Because of expected climatic changes which may affect rainfall, the simulations have been performed with different return periods for rainfall data.

GBD-Storage Systems is a company that provides the industries with products for efficient storage.The company produces pallet racks and accessories like cassettes and extending units. The companyhas also supplied tire racks for a number of tire companies. The company's CEO Gunnar Berglund hasfor some time had an idea to improve the working situation of the workers on tire firms by allowingthe wheels to be handled by a counterbalance truck. The current situation poses numerous heavy liftswhen the tires are handled and therefore is hurting the workers.This thesis has been aiming at helping the GBD-Storage Systems by developing a concept of howan accessory to counterbalanced trucks can be designed to cope with the wheels. This concept willthen be produced as prototype by the company.

Every year, KTH participates in the Shell Eco Marathon, a competition whose goal is to design a vehicle that can go as far as possible using only the equivalent energy of one liter of petrol fuel. This year, one of KTH?s contributions to this race is the Agilis prototype; a car powered by a uniquely configured HCCI-engine developed at the university. The engine is dependent of several subsystems in order to work properly, among other, systems for cooling and lubrication.Combustion engines are in need of a cooling system that reduces the heat developed during the combustion. In general, two main types of cooling systems are employed; either air cooling, where the outside of the cylinder is exposed to a flow of the surrounding air, ore water cooling, where water flows in tubes around the engine, and the heat are transferred by the water to the surrounding air through a heat exchanger.The purpose of the lubrication system is to prevent the friction that builds up in the interference between moving parts in the engine.

The work covered in this report includes a literature study of the diesel dual fuel technology(hereinafter referred to as DDF). The literature study covers earlier work that has been doneregarding the use of compressed natural gas (CNG) and diesel in a DDF system. Moreover a onecylinder research diesel engine was fitted with a CNG fuel system for experimental testing. Theinstallation of the engine and the test cell is described. Results from the tests are presentedcovering emissions, heat release and pressure traces from the DDF-concept.During the literature study it was found that most research was related to heavy duty dieselengines.

Närproducerad odling är en trend som växer sig allt starkare och visar sig bland annat i form av stadsodlingar på tak och balkonger. Då det är begränsat med utrymme att odla på i städer är vertikala odlingar en alternativ lösning.I den här rapporten presenteras ett gestaltningsförslag av ett vertikalt växthus som ett bostadskomplement. Gestaltningen, byggtekniken och klimatet i växthuset är de områden som präglar dess form och tekniska lösningar.Växthuset har placerats på Haningeterrassen, ett bostadsområde under planeringför vilket olika skisser på kretsloppsanpassade växthus har tagits fram. Syftet var att ta fram ett förslag på hur ett växthus som bostadskomplement kan utformas, anpassas till platsen och bidra till en grönare stadsdel. Genom en platsanalys har ett lämpligt flerbostadshus valts som referenshus för projektet.Arbetet resulterade i ett förslag på ett vertikalt växthus som har kopplats till bostadshuset och ger de boende ett växthus i direkt anslutning till sin lägenhet.

The task was to design and manufacture a submersible displacement pump working with the wobble plate principle. The main task for the Wobble plate pump is to be used as a sewage pump for smaller households or dewatering pump in environments where small flows and high pressures are acquired. For these purposes ITT Flygt sell a screw pump, PC-Grinder 3068. The hydraulic part of the PC-Grinder is manufactured by a subcontractor. Therefore ITT Flygt wants to evaluate an alternative to their screwpump PC-Grinder, which can be entirely manufactured by them self.

During year 2004 Ålö AB made significant change in their production process. The production of front loaders is nowadays highly automated with short operation times. To be able to control their process in a better way Ålö recently decided that they needed a tool for simulation of their production and to shift patterns. This final thesis started with a pilot study in Ålö?s factory in Brännland.

Delineation of recharge areas for aquifers is performed in the groundwater mapping process at the Swedish geological survey, SGU. This work is time consuming and performed manually. It is therefore desirable to develop a more general and repeatable method for defining recharge areas for aquifers.The purpose of this study was to investigate two other possible methods to delineate recharge areas for aquifers. The first method was to examine the possibility of using the topography of the bedrock to define the recharge areas for aquifers. To enable this, a method for generating the topography of the bedrock was developed.

Flextronics Design i Linköping, som ingår i den stora amerikanskägda Flextronics- koncernen, är en industrialiseringsenhet på mobiltelefonsidan. Det innebär att verksamheten kretsar kring att ta fram test- och monteringsprocesser, samt tillhörande utrustning, som sedan implementeras hos högvolymsfabrikerna belägna i olika låg-kostnads-länder.På mobiltelefonerna finns, beroende på modell, ett antal detaljer som pressas fast, antingen för hand, med en manuell press, eller med hjälp av en pneumatisk press. Den sistnämnda pressmetoden används när det rör sig om lite längre presstider på detaljen, från ett par sekunder och uppåt. Idag finns det två modeller som drivs med tryckluft och som pressar med olika kraftintervall beroende på vilket lufttryck som tillförs till systemet. Det har visat sig att det finns ett behov hos företaget att ta fram en ny konstruktion som pressar med ett lägre kraftintervall än de befintliga modellerna kan erbjuda.