<p>Examensarbetet gick ut på att konstruera ett robotlås. Ett robotlås håller fast roboten i sitt transport/utskjutningsrör till det är dags för roboten att avfyras. Det första som gjordes var att förutsättningslöst försöka komma på så många grundidéer som möjligt. Efter detta togs de krav vi hade fått med. Dessa bestod av mått- krafts- tids- och miljökrav. Med dessa krav i beräkningarna togs det fram fyra kompletta CAD-modeller, varav en av dessa modeller utfördes i två versioner. Två koncept som baserades på att en hake roterar runt en axel samt två koncept där ett låsstift rör sig linjärt i ett spår. En utvärdering gjordes av dessa fem alternativ samt det befintliga låset. Resultatet visade att endast en av varianterna är bättre än det befintliga låset. Dock varierar styrkor och svagheter mellan alternativen.</p> / <p>The subject of the thesis work was to construct a missile lock. The purpose of a missile lock is to hold the missile in its launch tube until it’s about to be fired. The first subject was to develop basic ideas without considering any performance specifications. When that was done, the specifications for space, environment, speed and forces were taken into account. Including these specifications in the calculations, four complete CAD-models were produced. Two concepts are based on a hatch rotating around a shaft and two other concepts are based on a locking pin moving linearly in a track. One concept was also included in a second version since simplifications could be made. An evaluation was made with these five alternatives and the existing missile lock. The results showed that only one concept was better than the existing lock. There are however variations where the different concepts work best.</p>

<p>The work presented in this report is written at IEIs department on Linköping Institute of Technology. The report aims to increase the assembly efficiency at Wigells AB. The report shall be used as a guide for the implementation of changes at other workstations in the company. Together with Träcentrum in Nässjö, Wigells AB has identified the needs of this study and contacted IEI at Linköping Institute of Technology.</p><p>In order to implement an efficient assembly line at the company, studies on lean production have been made. This theory has been studied and together with our own views and findings at the company we have analyzed the assembly area.</p><p>Wigells is a small company that manufactures wood furniture. A major problem for the assembly of the pin seats is that the company has a wide range of different models and designs.</p><p>In order to identify problems and possible improvements we first carried out a current state analysis of the assembling area.</p><p>The current state analysis shows that there are many operations in the manufacture of pin seats which are routine. Production consists today of manual operations and no automatic equipment. The company does not wish to acquire any automatic equipment.</p><p>The assembly location is perceived by outsiders and employees of the company as disorganized. After the current state analysis was conducted and compiled, problems were identified in order to enable improvements.</p><p>Identified difficulties in assembly:</p><ul><li>Difficult to get an overview of the assembly area, it is perceived disorganized and cluttered assembly area</li><li>No documentation for assembly</li><li>Defective components from external suppliers</li><li>Defective components from internal machines</li></ul><p>In order to create solutions to problems discovered we had to link theory and our own views together to suggest new proposals. The major problem requiring a solution is how to pass on the existing craftsmanship and knowledge.To enhance the efficiency of the assembly area many small changes that are suggested must be implemented. The company should get the staff involved in the changes proposed in this work to get best result.<strong></strong></p>

<p>Ett nytt musik- och teaterhus byggs vid Munksjön i centrala Jönköping. Dit ska Smålands Musik och Teater (SMoT) flytta sin verksamhet. Den nya byggnaden kommer att innehålla ett flertal scener varav två av dessa scener ska utrustas med ett automatiserat övermaskineri: Teaterscenen och Konsertscenen. De ska utrustas med samma system fast den senare i en mindre omfattande installation. Detta arbete innehåller en studie av ett generellt system och en analys av dess delfunktioner. Analysen utgår ifrån de lösningar som presenterats för mig hos de företag jag besökt. Det finns flera aktörer i Europa som tillhandahåller dylika system. Av dessa har SMoT i nuläget visat intresse för fem:</p><p>• Theatertechnische Systeme, Tyskland</p><p>• Stage Technologies, England</p><p>• Trekwerk, Holland</p><p>• Maquinas Iberica, Portugal</p><p>• Visual Act, Sverige</p><p>Upphandlingen av detta system är inte påbörjad. Syftet med detta examensarbete att beskriva ett modernt automatiserat övermaskineri och analysera dess delfunktioner och på så vis få fram ett underlag till vilka krav man bör ställa på ett dylikt system.</p> / <p>A new theatre building is being constructed in Jönköping, Sweden. In one of the stages an automated flybar system needs to be installed but which system has yet to be decided. In this report you will find a pre-study of a general system and an analysis based upon several common systems installed in theatres and venues in Europe. The approach is to break down a general system into subfunctions and analyze them. The solutions to each subfunction is based on the ones presented to me visiting:</p><p>• Theatertechnische Systeme, Tyskland</p><p>• Stage Technologies, England</p><p>• Trekwerk, Holland</p><p>• Maquinas Iberica, Portugal</p><p>• Visual Act, Sverige</p><p>The purpose of this thesis is to describe a general system and analyze its functions and by doing so aid the decision making process.</p>

<p>This thesis was conducted at Linköping University and SAAB Aerostructures, Linköping, and focuses on the automation of flexible fixturing in machining applications. At Linköping University a project called "Koofix" is conducted with support from Strategiska stiftelsen and several manufacturing industries including SAAB Aerostructures. The purpose of this project is to develop a more cost-effective, flexible, technique for fixation of workpieces during processing and assembly.</p><p>Fixtures are an important part during the machining process, especially if you process the parts with high accuracy. Today a large number of fixtures are used at SAAB and they would prefer to reduce the number of fixtures by using flexible fixtures instead. SAAB uses one fixture for each article and this result in a high fixture cost and it also takes time to design and construct a new fixture.</p><p>There are several advantages with using a flexible fixture such as that you can process workpieces with different length, height and thickness in the same fixture. Bigger workpieces takes time to fasten in the fixture because the machine operator must tighten the clamps by hand. By automating the fixture with for example grippers or clamping cylinders the set time would be reduced because the clamping process is automatic.</p><p>In this report there is also a mapping of various flexible fixture components such as grippers, clamping cylinders and linear units. These components are quite common today in the processing industry and are also used in fixtures. The idea of flexible components is to provide a more flexible and automated fixture then the currently used at SAAB. These components were also linked to a concept idea and based on this idea, several concepts were sketched. The result of the concept idea was two concepts that were generated in the CAD program CATIA.</p><p>The first concept uses grippers for the clamping process and for additional flexibility the grippers can also be rotated with rotary actuators. Linear units are used to automatically position the beams to reduce the set time. The second concept uses clamping cylinders and rotary grippers to clamp the workpiece. Beams are positioned by an operator, but linear units could also be used in this concept as well.</p><p>Finally, the concepts were evaluated according to a method from Ullman with a so called decision matrix. The concept that fulfilled the criteria best was concept 1, which uses grippers and linear units. Another method that was used from Ullman was a QFD (Quality Function Deployment) chart and this chart shows the design requirements that are important and that should be fulfilled.</p><p>The components that are presented in this report have not been tested. This could be a suggestion in an upcoming work to test these components. For example the pneumatic linear units with passive or active brake could be tested to make sure that the braking force is sufficient.</p>

etanolkonvertering

<p>E-Series 450 is a chainsaw designed by Husqvarna AB to the semi-professional user. Husqvarna is a world leader when it comes to chainsaws, trimmers, lawn mowers and garden tractors. The problem in hand can be addressed by the question. ”How easy can we start a chainsaw” The purposehas been to provide a solution to the question above and give Husqvarna a good base of which they can continue towards a finished product. The goal of the project has been to construct a working prototype for a series of test runs.The project has involved a pre- study that resulted in a number of concepts which were evaluated in batches in order to come up with a concept that seemed durable enough to proceed with into the primary formation and construction.The work has, after a decision, mostly involved downsizing and optimizing of the different parts which have been designed in Catia V5 R18 for prototyping.SammanfattningTwo prototypes have been created during the project, the first as a base to the later, and have been tested and evaluated.The project has resulted in a prototype with two alternatives to start with. The result gives the user an easy and effective start process.The conclusion we can draw after the work is that the new design offers a simplified startup process for the user. The project team considers itself to have achieved the objective of the project.To simplify for the reader, a stand-alone part containing calculations and dimensioning has been made where those who want to immerse themselves in the underlying calculations and information which creates the foundation of the decisions made throughout the project.</p>

<p>Av vår uppdragsgivare SOMAS i Säffle har vi fått uppgiften att konstruera ett bottenlock till kalottventil DN500 PN25. Vårt mål med arbetet är att minimera vikt och bearbetnings kostnad för locket. Materialet består av CF8M enligt Amerikansk standard.[2] Locket ska godkännas enligt SS-EN 13445-3:2002.[1] För FEM-analys används bilaga C design by analysis. [1]</p><p>Locket ska analyseras i 3 lastfall.</p><ul type="disc"><li>  <ul type="circle"><li>Täthetsprovning av sätet, påverkar locket med en radiallast</li><li>Tryckprovning, påverkar locket med en övertryckslast</li><li>Drift baklänges, både radiallast och inre övertryck</li></ul></li></ul><p> </p><p>Med utgångspunkt från kalottventil DN500 PN10, som har identisk axel och kalott, analyserades locket till DN500 PN10 i Abaqus med övertrycket 25bar. Där locket inte uppfyllde kraven sattes stödfjädrar för att styva upp locket. Vid låga spänningar togs det bort material för att reducera vikten.</p><p> </p><p>Lastfall 1 och 2 godkändes statiskt och temperaturberoende. Lastfall 3 underkändes då de linjäriserade spänningarna inte klarade kraven för ventilen. Locket kan inte styvas upp mer då styvfjädern skulle gå in i skruvförbandet. Då inte lastfall 3 får godkänt enligt standard [1] ändrades det värsta fallet för ventilen till lastfall 1 som beräknades med de två olika materialstandarderna SS-EN10213-4 Nr 1,4408 [3] och ASTM A351 CF8M [2] och det blir godkänt i båda fallen även om det är ett gränsfall med den europeiska standarden. Ventilen kan köras i lastfall 3 med reducerat tryck, motsvarande 10 Bar med europeisk standard och 11 bar med amerikansk materialstandard. Lastfall 1 klarar inte kraven för utmattning.   </p><p> </p><p>Det vi kommit fram till för att ett nytt examensarbete ska kunna genomföras är att centrera locket under huset vilket skulle skapa plats för stödfjädrar på lockets framsida. Att minska kontakttrycket borde även det vara önskvärt, vilket skulle åstadkommas med en ökad axeldiameter.</p> / <p>By our employer SOMAS in Säffle we have been given the assignment to design a bottom lid for the ball segment valve PN25 DN500. Our goal is to minimize the weight and the manufacturing cost of the lid. The material consists of CF8M according to American standard.[2] The lid will be approved according to appendix C FEM-analys. [1]</p><p> </p><p>The lid will be analyzed in 3 load cases.</p><ul type="disc"><li>Seat tightness test, affects the lid with a radial force</li><li>Pressure testing, open valve</li><li>Operation backwards to the valve, both radial force and inner pressure</li></ul><p> </p><p>With base from DN500 PN10, which have identical shaft and ball segment, the lid PN10 DN500 was analyzed in Abaqus with the pressure 25 Bar. Where the lid didn’t reached up to the demands, ribs where placed to stiffen up the lid. If there where low tension material where removed to lower weight.</p><p> </p><p>Load case 1 and 2 where approved for static and temperature dependence. Load case 3 failed when the stress linearization didn’t meet up to the demands for the valve. Due to the lack of space to build out more material the lid could not be stiff enough to support the load. Load case 3 was cleared at 10 bar by European standard [3] and 11 bar by American standard. [2]</p><p>Load case 1 is not approved for fatigue.</p><p>We have come to the conclusion that a new graduation work can be done if the housing could be centered under the house to make room for a longer rib to support the housing. To decrease the contact pressure an increase in shaft diameter would be wanted.</p>

<p>This degree project is a part of the mechanical engineer program at the University of Karlstad. The project has been fulfilled during 15 weeks in collaboration with Coffee Queen AB.</p><p>Coffee Queen is a company that produces professional coffee machines. The company is a leading supplier of coffee machines to offices, restaurants and fast food industries.</p><p>The assignment has been to develop an operating concept of a system that will flavour carbonated water. This due to the fact that one of Coffee Queens greatest customer submitted wishes to get this function on their coffee machines.</p><p>The solution that came up was that with help of a pump dose the right amount of floating essence. Then this essence mixes with the carbonated water in a mixing faucet and then dispenses out into a glass.</p><p>The project resulted in a simple working prototype. The finished product will probably get in bulk production in the beginning of 2009</p> / <p>Detta examensarbete är en del i maskiningenjörsutbildningen vid Karlstads universitet. Arbetet har genomförts under 15 veckor tillsammans med uppdragsgivaren Coffee Queen AB i Arvika.</p><p>Coffee Queen är ett företag som tillverkar kaffemaskiner för professionellt bruk. Företaget är ledande leverantör av kaffemaskiner till kontor, restauranger och snabbmatskedjor.</p><p>Uppgiften har varit att ta fram ett fungerande koncept för hur smaksättning av kolsyrat vatten kan ske. Detta efter att en av Coffee Queens största kunder har efterfrågat denna funktion i sina kaffemaskiner.</p><p>Lösningen blev att med hjälp av en pump, dosera ut rätt mängd flytande essens. Denna essens blandas sedan med det kolsyrade vattnet i en blandningsventil, för att sedan dispenseras i ett glas.</p><p>Projektet har resulterat i en enkel prototyp. Den färdiga produkten kommer troligtvis att börja serietillverkas i början av 2009.</p>

<p>This Degree project for Degree of Bachelor of Science in Innovation and Design Engineering has been carried out by Emmelie Johansson and Johan Skarius at the Faculty of Technology and Science at Karlstad’s university during spring 2009. The Degree project extends 22,5ECTS credits.</p><p> </p><p>The commissioning body for this project has been Posten messaging AB, production and processes. The orderer and supervisor was Arne Grentzelius. Supervisors and examiners at Karlstad’s university were Monica Jakobsson and Lennart Wihk.</p><p>Posten is one of the Nordic regions largest messaging and logistics operators. They are serving 4.5 million homes and 900 000 businesses daily.</p><p> </p><p>Posten messaging AB is a daughter company to Posten AB. Posten messaging includes both post activities for private customers and companies. The service contains mail distribution and news distribution. Mail distribution gives Posten the largest incomes. Posten distributes both unaddressed and addressed direct mail. Their main country is Sweden.</p><p>There are about 15000 mailmen in Sweden and 2750 of them are delivering mail by bicycle.</p><p> </p><p>Posten has a problem with the front mailbag on the bicycle and want it to be improved. That is how the students got their assignment. The assignment is to find a better solution of the mailbag. Today’s mailbag has some problems, like its short lifetime, high price and its rain cover allows almost no resistance against rain.</p><p> </p><p>To fulfil all the mailmen’s needs, an extensive analysis of the current market as interviews, inquiries and study visits were made.</p><p>A several manufacturing companies were contacted by the students, about technical possibilities and estimates of price of the future product. These were followed by generating innovative ideas and identify those which are most likely to become successful concepts.</p><p> </p><p>The final product is made of a plastic material or a composite material (such as glass fibre) which gives it a much longer lifetime together with, more stability and a very advantageous price. Most accessories have been integrated to the manufactoring, which makes it easier to deliver mail. The rain cover has been more resistant of the penetration of rain<strong> </strong>and designed to fit the mailbag.</p><p> </p><p>The degree project resulted in a prototype in a 1:1 scale, 3D-visualisations, an academic report, a final presentation and an exhibition</p><p> </p>

<p>The purpose of the rebuild of Notnäs AB timber sorting line is to renew the existing drive and turning ends of the transport chain, which has become old. This means that Notnäs AB have problems to get new parts if the gearbox and chain are worn out. They also require that the rebuild should have a maintenance schedule for the new spare parts that will be used in the rebuild. Maintenance workers placed great emphasis on that in a rebuild it shall be a service-friendly design. The maintenance schedule used in Notnäs AB in the current situation is from Statoil and the report uses SKF formulas and recommendations in order to obtain a lubricating schedule. The rebuild has been made in Pro Engineers skeletal structure with a top-down structure. Notnäs AB will have all the CAD files as well as complete drawings that make it possible for the rebuild to take place after the summer of 2010. After a summary of the CAD it revealed that a rebuild of timber sorting line was possible. Parts of the draw-ings are available in a reduced format of the report. Drawings have been approved and work on the rebuild can be started by Notnäs AB.The purpose of the rebuild of Notnäs AB timber sorting line is to renew the existing drive and turning ends of the transport chain, which has become old. This means that Notnäs AB have problems to get new parts if the gearbox and chain are worn out. They also require that the rebuild should have a maintenance schedule for the new spare parts that will be used in the rebuild. Maintenance workers placed great emphasis on that in a rebuild it shall be a service-friendly design. The maintenance schedule used in Notnäs AB in the current situation is from Statoil and the report uses SKF formulas and recommendations in order to obtain a lubricating schedule. The rebuild has been made in Pro Engineers skeletal structure with a top-down structure. Notnäs AB will have all the CAD files as well as complete drawings that make it possible for the rebuild to take place after the summer of 2010. After a summary of the CAD it revealed that a rebuild of timber sorting line was possible. Parts of the draw-ings are available in a reduced format of the report. Drawings have been approved and work on the rebuild can be started by Notnäs AB.</p>