SSAB Tunnplåt AB i Luleå tillverkar höghållfasta stål och ett viktigt processteg är stränggjutningen, där flytande stål gjuts till så kallade slabs: stålstycken som sedan valsas till plåt. Under gjutningen rör sig den första delen av anläggningen i en oscillerande rörelse som är viktig för processen, men denna rörelse genererar också intryck i det nybildade stålskalets yta, varpå stålet riskerar att spricka. Dessa inre och yttre sprickor försämrar slabsens kvalitet. Sprickförekomsten kan påverkas genom att styra oscillationsrörelsen under gjutningen. Sprickfrekvensen skattas genom att mäta det så kallade oscillationsmärkesdjupet.

AbstractThis is a thesis done in cooperation with the firm Somas and University of Karlstad. The project is an independent final examination part of the program in Innovation and DesignEngineering comprising 22.5 points, and performed by Mia Myrén Zreloff during spring term 2012. In parallel and collaboration, Fredrik Kjellin performs a similar job for the same company and with the same extent, but for the Program in Mechanical Engineering.The client and supervisor at the company have been Magnus Jansson and Anders Josefsson. At Karlstad University has technical supervisor been Hans Johansson, and in the design- and development process it was Monica Jakobsson. Examiner has been Fredrik Thuvander, professor in the Faculty of Technology and Science at Karlstad University.The mission has been to make a basis work for the company's own development and make a computational model to calculate, visualize and implement materials and other solutions in the manufacture of the company's ball valves.The project has undergone three major phases that included thorough study of the company, production, the problem and product.

To maintain production in high salaries countries and strength in competition against other companies, it is today more important than ever to maximize production, offer a wide spectra of products and be able to deliver on the customers desire of shorter and shorter delivery time. Flexible production and short time spent on die changes is vital to achieve these desires. The interest for die changeover time reduction grew in the same pace as the demand for increased product variety grew. SMED as a method of reducing time spent on die changeovers were developed in between 1950-1970, by the Japanese Shigeo Shingo.The purpose of this thesis work has been to investigate the result of SMED in a Die casting facility, and compare the result from it with the result considering time spent on die changeovers when investing in new equipment. The goal is to implement a thorough investigation by using the SMED method at Tenhults Pressgjuteri AB and make a brochure that have to be simple to understand, in purpose to draw interest to the advantages of using SMED as a method.Commissioned by the Swedish foundry association Swecast, the work has been carried out by studying die changeovers at Tenhults Pressgjuteri AB, where filming and interviews with the operators have been included in the analysis.

In the last few years people have become more and more aware of how humanity is affecting the climate. In the direction of reducing the greenhouse gases is to design engines with higher tensile properties and reduced weight, in order to achieve lower fuel consumption and cleaner fuel incineration in today's truck engines.In order to achieve these requirements it?s necessary to increase the combustion pressure in the engine. This requires higher tensile properties and high thermal conductivity of the engine material. The department of Component Technology at the University of Jönköping in collaboration with Volvo Powertrain AB, Scania CV AB and DAROS Piston Rings AB has been commissioned to develop this material and to find knowledge of material properties used in truck engines and piston rings used for marine applications.The purpose with this work is to analyze the tensile properties of a series of cast iron, cast under different metallurgical conditions.Four different series of cast irons have been analyzed from four points of view, carbon concentration, nodularity, amount inoculation and cooling rate.After the tensile test all specimen data was analyzed in a mathematic calculation program called Matlab 2006a.

Det är vanligt att Svenska företag har leveranssäkerhetskrav på sina underleverantörer. Det är normalt att företag får problem att leverera varorna i tid till sina kunder ibland, vilket kan medföra stor ekonomisk förlust för företaget. Denna rapport är resultatet av ett examensarbete vid Mälardalens Högskola som utförts på uppdrag av International Aluminium Casting AB i Eskilstuna.Syftet med denna rapport är att se över IAC:s fabrik i Eskilstuna ute på Vilsta, för att kartlägga deras tillverkningsprocess och identifiera problemområden i tillverkningen som kan ha direkta effekter på leveranssäkerheten.För att uppnå syftet med arbetet utfördes först en litteraturstudie inom området effektiv produktion, följt av en empirisk studie som utfördes i fabriken på företaget. Detta ger arbetet en hög betryggande anknytning om hur verkligheten ser ut och ger innehållet en bekräftelse emot teorin inom området. En noggrann nulägesbeskrivning utfördes för att få en konkret bild över hur tillverkningsprocessen gick till och för att kunna se vart i processen det finns problem, vilket skulle kunna påverka företagets förmåga att leverera sina varor i tid till kunden.

Under två terminer har vi medverkat i en forskningscirkel på en grundskola som behandlat historieundervisning i en mångkulturell miljö. Forskningscirkeln startades i samband med att den aktuella skolan fick ett stort tillskott av elever med invandrarbakgrund. Det ena syftet med detta examensarbete är att synliggöra lärarnas syn på rollfördelningen inom den aktuella forskningscirkeln. Den rollfördelning vi syftar på är framförallt den mellan forskarna och lärarna, inte lärarna emellan. Det andra syftet är att se hur lärarna upplever att de påverkats av att medverka i forskningscirkeln, och då med fokus på historieundervisning i en mångkulturell miljö.

This report provides a comparison between the products cellular concrete, foam concrete and LECA concrete. The questions to be answered during the work is how the cellular concrete stands up in cost terms to the existing competitors on the market, how the concrete products differ in design work, and in which situations the concrete varieties are preferred to use.Cellular concrete is a variant of ordinary concrete, with the difference that the ballast is exchanged from stone materials to expanded polystyrene beads (EPS). This substitution gives a product with higher insulation values but lower weight than ordinary concrete.The work was carried out by designing a survey which was sent to two hundred randomly chosen companies across Sweden, to see the building industry?s opinion of the product cellular concrete. The survey showed that cellular concrete was equals its competitors in terms of price, while the product was said to be more flexible, quicker and easier to cast.Then some of the companies, who participated in the survey, were interviewed to see more carefully, how the price, the workmanship and the time for casting and dehydration differed between the products.

Transit Objects In the Master Essay I argue around two existing levels in the works presented at the graduation exhibition. On the one hand, it is about influence; on the other hand it is about the phenotypes of purpose-ness. In the introduction, I describe the relationship between the shapes that I have come to call Transit objects, and their on the one hand ideological superstructure; on the other hand, the different aspects of their shapes regarding the imitation I, in creating the objects, performed. In the case with the objects shape-aspects, I stand on the thoughts that I found during my bachelor's work, that is, to express the phenotypes of purpose-ness.When it comes to influence, I speculate about how linguistics, and particularly a branch called neuro-linguistics, illustrates how the arguments that make up our world can be transformed. I use a meta-model and a conversation model as a tool to illustrate this. When I, like that, illustrate the plasticity of meaning, and cognition, I note Catherine Malabous taught (in her book What Should we do with our brain?) on the plasticity of the brain in relation to the neo-liberal systems of capitalism. She argues for how the brain has come to stand model for the organization of different types of networks. I hint the link to a future scenario where the desire to influence takes new forms and uses the latest brain research challenges, more specifically the use of ultrasound for the treatment of pain and other similar conditions. This also can be used as generating various types of seizures, pleasant or unpleasant.