Sök:

Sökresultat:

1033 Uppsatser om Mechanical engineering - Sida 47 av 69

Pålade plattor för stora laster : En jämförelse mellan nätarmerade och fiberarmerade betong plattor

Funktionskraven på industrigolv har under senare år ökat. Ett industrigolv skall klara att överföra laster till underlaget samt utgöra ett fast och plant underlag. I denna rapport har två utföranden av påldäck för golv i lagerlokaler jämförts. Den traditionella metoden med armeringsnät har jämförts med en något nyare metod med stålfiberarmerad betong. Jämförelserna har gjorts under förutsättning att golvet skall belastas med 3 ton per kvadratmeter.

Konstruktion av serviceutrustning till tunnelborrningsmaskin

The Master Thesis work this report is based upon has been conducted in cooperation with Svea Teknik AB. Svea Teknik is a consultant firm which is developing parts of a tunnel boring machine on behalf of Atlas Copco. The machine is being developed to mechanically excavate hard rock by fixating itself in the tunnel and then press a large rotating cutter-wheel equipped with disc-cutters against the tunnel wall. The disc-cutters are the tools that are in direct contact with the hard rock and are therefore exposed to extensive wear and needs to be replaced on a regular basis.The purpose of this Master Thesis has been to develop a service equipment that will enable time effective and safe changes of disc-cutters. The disc-cutters have a diameter of 17 inches and weigh about 130 kg.

ERP-system : framgångsfaktorer vid införandet

Syftet med uppsatsen har varit att undersöka framgångsfaktorer vid införandet av ERP-system i olika företag. Både kundernas och leverantörens syn på framgångsfaktorer vid införandet har klargjorts. Min empiriska undersökning har utförts på fem olika företag och jag har intervjuat totalt fem personer som samtliga haft mycket centrala roller vid ERP-införandena. Vid intervjuerna har jag använt mig av kvalitativ ansats där informanterna har fått berätta relativt fritt om vad de uppfattat kunna påverka framgången med införandet av ERP-systemen. Jag analyserade det insamlade materialet med hjälp av empirinär kvalitativ bearbetning, i form av innehållsanalys.

Att sticka ut i mängden - En studie av tekniker för variation av instansierade modeller

Trots den senaste tidens hårdvaruutveckling är realtidsrendering av stora folkmassor fortfarande ingen trivial uppgift. Denna uppgift beskrivs som crowd rendering. Effektiv crowd rendering bygger ofta på instansiering, men instansiering kommer med ett problem, det skapar kloner. Denna uppsats syftar till att undersöka och utvärdera ett antal tekniker som används för att skapa mångfald för instansierade modeller. Dessa tekniker kommer tillsammans att kallas varierad instansiering.

Processutveckling av borstgradning

During the milling of Sandvik Coromant?s world leading Drill with replaceable inserts,the CoroDrill880©, burrs appear around the milled surfaces. The burrs are removedusing different methods, one of which is deburring with special brushing machines thatare integrated into milling cells. The machines of the type Sinjet, use a Siemensguidance system. The deburring results are not satisfying and manual deburring isrequired afterwards.

Utmaningar med utveckling av mobila applikationer : En fallstudie om kravhantering ur ett utvecklingsperspektiv

The use of mobile devices has during the last years expanded and on the market you can see a huge amount of applications. The development of mobile applications differs from traditional systems development since mobility infers that mobile applications can be used in different technological and social contexts. Although previous research has recognized that mobility can present mobile application developers with certain challenges, empirical studies of how problems arise and how they can be handled has thus far been limited. In this study we focused on the requirements engineering process from a development view with the purpose of finding challenges emerging in the development process. The study is based on a qualitative case study that employed semi-structured interviews with both project managers and system developers active in the requirements process.

EW26 : Drivanordning för vertikaltgående fönsterpartier

EW26 is a Bachelor thesis carried out by students, Jessica Blomberg, Sara Danielsson and Mikael Johansson, during the academic year 2010-2011 at the Innovation Engineering Program of Halmstad University. The project was conducted in close cooperation with Ergosafe AB.Ergosafe develops, manufactures and sells electric sliding windows. Due to the company?s current expansion phase they want to increase their product range. The company has identified a need for large windows that moves vertically.

Undersökning och framtagning av ett moduluppbyggt datainsamlingssystem

This report is about a thesis that is performed in and for SYSteam Engineering AB in Motala. The thesis work is divided into three parts, study of the market, programming and electronics. The study part consists of examining and comparing different data acquisition systems for testing of different circuit boards, taking into account the modularity, real-time applications, mobility, environmental, interface hardware and software, to be able to define a general module-based data acquisition system in both hardware and software that enables for future developments.The programming part consists of getting started with Visual Studio, which integrates the Measurement Studio for C#. NET. Measurement Studio includes classes and user controls for testing and measuring and offers tools for acquisition, analysis and presentation of real world data.

J.E.R.E.M.I.E : en studie om förutsättningarna för ett nytt EU program

Abstract Semester and year: Spring, 2008Writers: Victor Andersson and Filip ForslundTutor: Thomas HelgessonProgram: Marketing program, Halmstad University - School of Business and EngineeringTitle: Differentiation from a consumer perspective - How important is differentiation from a consumer?s perspektive when choosing a residence? Presentation of problem: How important is differentiation from a consumer?s perspective when choosing a residence?Purpose: The purpose is on basis from previous theories on the subject to describe what kind of differentiating that from a consumerperspective is the most important when choosing a residence. Key words: Differentiation, brand, apartment market Methodology: This thesis is built on an qualitative method, where eight open individual interviews have been made. Our choice of respondents was based on what kind of respondents that could give us the most accurate information on the subject which we based on relevant variables. Theory: The framing of the theories is based on a marketing perspective within the area of differentiating and focuses on how companies use different tools to differentiate their offer to create competitive advantages.

Utredning av frekvensregleringens påverkan på mekanisk utrustning i en kaplanturbin

As a consequence of increasing wind power installations in the Nordic grid the last years, the need for regulating power has become larger. In the Nordic grid, regulating power is mainly provided by hydro power. One part of the regulating power is called frequency control, which ensures that the grid frequency is stable and close to 50 Hz.However, setting the turbine into frequency controlled operation may cause stress and wear of the components in the mechanical control system. Frequency controlling implies large and frequent servo forces and longer travelling distance of the sliding bearings in the Kaplan turbine.Based on one selected Kaplan turbine, Selsfors G1, measurements and MATLAB calculations have been performed in order to determine forces and movements of the linkage system. With these forces and movements as input, stresses and fatigue have been determined as well as sliding distances, bearing pressures and wear of bearings during a typical lifetime of 40 years.The results indicate that no severe wear exists on the bearings during 40 years of service.

Utveckling av vippgunga för barn i åldrarna 1-3 år

Under våren år 2013 har Emilia Andersson, en designingenjörsstudent på Högskolan i Skövde, utfört ett produktutvecklingsprojekt i samarbete med HAGS Aneby AB. Syftet med projektet var att utveckla en vippgunga vars storlek skulle vara anpassad för barn i åldrarna 1-3 år. Målet var att vippgungan ska kunna säljas över hela världen samt uppfylla den amerikanska standarden och europastandarden för lekredskap.Projektet inleddes med en förstudie och teori-fas, där bland annat litteraturstudie och konkurrentanalys genomfördes och annan information samlades in för att få djupare kunskaper inom ämnet. Därefter började idéer och koncept genereras, som sedan genomgick utvärderingar, så som användartester, vilket ledde till ett slutkoncept. Konceptet utvärderades med hjälp av bland annat hållfasthetsberäkningar och en antropometrisk analys.Den slutgiltiga vippgungan kan trots anpassningen för åldersgruppen, inte bara användas av 1-3-åringar utan också av äldre barn, tack vare att konstruktion och framförallt handtag ger extra lekvärden.

Glidytor och ytjämnhet med avseende på friktion och tätning

Gliding and sealing functions in Öhlins shock absorbing systems sets great demands onthe contacting surfaces. In this particular case, the bushings and the sealings on acylinder piston. The surface wanted is a surface with both low frictional forces and smallleakage. This study was done with the goals of investigating and determining existingsurfaces due to the frictional force and leakage. How can we in an easy mannerdescribe these?A number of ten front forks were part of a main study.

Produktivitet vid selektiv mekaniserad bioenergiröjning av eftersatta röjningsbestånd :

In Sweden, harvesting pre-commercial thinning (PCT) stems for energy purposes is a interesting way of financing the high cost of preparing dense stands for a profitable first conventional thinning. This concept can be labelled bioenergy thinning. The aim of this study was to quantify the productivity of a Vimek 404R light harvester with an accumulating Naarva-Grip cutting head during the bioenergy thinning of a self-regenerated stand west of Sunnansjö in Dalarna. The stand was birch-dominated, contained 15 371 stems/ha, and measured on average 4,6 cm Dbh and 7 m tall. Even though the driver was well experienced with the machine, the stand in question was the first one that he ever thinned in this manner. Nevertheless, the driver strived to accumulate as many stems as possible during each crane cycle and chose to cut taller stems in half so as to make the handling and forwarding of the harvested stems easier.

Rostskyddssystem för stålprofiler : Tekniska egenskaper, ekonomi och miljöfrågor

Nästan alla stålkonstruktioner måste rostskyddas. Undantaget är de som står inomhus i torr luft. Ett rostskydd kan utföras på flera olika sätt, men de vanligaste är att stålet målas med rostskyddsfärg eller att det varmförzinkas. Innan detta kan utföras måste stålet förbehandlas. Det är viktigt att den utförs noggrant för annars kan kvarvarande föroreningar börja rosta under färg- eller zinkskiktet.

Intellectual Property Rights : A Barricade to Technological Development. An Ethical Analysis on the Less Developed Countries

Debate over Intellectual Property Rights ?IPRs? particularly patent and copyrights is mainly on forward-looking industries in computer software. As part of a trade deal reached in 1994, the member nations of the World Trade Organisation must adhere to a global agreement known as TRIPS, for the Trade- Related Aspect of Intellectual Property Rights.This study is to analyse the ethical conception of Intellectual Property Rights and in particular its implications on the developing countries in relation to TRIPS. The approach will be to analyse a broad philosophical theories of property to see if there is any justification for a software program to be treated as private property and also argue base on John Rawls two principles of justice in relation to TRIPS Agreement. Some reflections will be put on the use of open-source software by less developing countries.From the study it was asserted that, strong IPRs protection would hinder technological transfer and indigenous learning activities in the early stage of industrialisation when learning takes place through reverse engineering.

<- Föregående sida 47 Nästa sida ->