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  • 151.
    Pålsson, Petter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Lathund vid el-mekanisk dimensionering: Applicering av GT data2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    En lathund som ska användas vid hållfasthetsberäkning på el-mekaniska ställverk togs fram. Med hjälp av lathunden kan en konstruktör ta fram dimensionerande lastfall och utföra hållfasthetsberäkningar enligt svensk standard. Arbetet är utförd tillsammans med företaget Mikatec AB, i Sundsvall.

  • 152.
    Roos, Stefan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Process Development for Electron Beam Melting of 316LN Stainless Steel2019Licentiate thesis, comprehensive summary (Other academic)
    Abstract [en]

    Additive manufacturing (AM) is a technology that inverts the procedure of traditional machining. Instead of starting with a billet of material and removing unwanted parts, the AM manufacturing process starts with an empty workspace and proceeds to fill this workspace with material where it is desired, often in a layer-by-layer fashion. Materials available for AM processing include polymers, concrete, metals, ceramics, paper, photopolymers, and resins. This thesis is concerned with electron beam melting (EBM), which is a powder bed fusion technology that uses an electron beam to selectively melt a feedstock of fine powder to form geometries based on a computer-aided design file input. There are significant differences between EBM and conventional machining. Apart from the process differences, the ability to manufacture extremely complex parts almost as easily as a square block of material gives engineers the freedom to disregard complexity as a cost-driving factor. The engineering benefits of AM also include manufacturing geometries which were previously almost impossible, such as curved internal channels and complex lattice structures. Lattices are lightweight structures comprising a network of thin beams built up by multiplication of a three-dimensional template cell, or unit cell. By altering the dimensions and type of the unit cell, one can tailor the properties of the lattice to give it the desired behavior. Lattices can be made stiff or elastic, brittle or ductile, and even anisotropic, with different properties in different directions. This thesis focuses on alleviating one of the problems with EBM and AM, namely the relatively few materials available for processing. The method is to take a closer look at the widely used stainless steel 316LN, and investigate the possibility of processing 316LN powder via the EBM process into both lattices and solid material. The results show that 316LN is suitable for EBM processing, and a processing window is presented. The results also show that some additional work is needed to optimize the process parameters for increased tensile strength if the EBM-processed material is to match the yield strength of additively laser-processed 316L material.

  • 153.
    Roos, Stefan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Process window for electron beam melting of 316LN stainless steelManuscript (preprint) (Other academic)
  • 154.
    Roos, Stefan
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Botero Vega, Carlos Alberto
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Danvind, Jonas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Rännar, Lars-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Macro- and Micromechanical Behavior of 316LN Lattice Structures Manufactured by Electron Beam Melting2019In: Journal of materials engineering and performance (Print), ISSN 1059-9495, E-ISSN 1544-1024, Vol. 28, no 12, p. 7290-7301Article in journal (Refereed)
    Abstract [en]

    This work focuses on the possibility of processing stainless steel 316LN powder into lightweight structures using electron beam melting and investigates mechanical and microstructural properties in the material of processed components. Lattice structures conforming to ISO13314:2011 were manufactured using varying process parameters. Microstructure was examined using a scanning electron microscope. Compression testing was used to understand the effect of process parameters on the lattice mechanical properties, and nanoindentation was used to determine the material hardness. Lattices manufactured from 316L using EBM show smooth compression characteristics without collapsing layers and shear planes. The material has uniform hardness in strut shear planes, a microstructure resembling that of solid 316LN material but with significantly finer grain size, although slightly coarser sub-grain size. Grains appear to be growing along the lattice struts (e.g., along the heat transfer direction) and not in the build direction. Energy-dispersive x-ray spectroscopy analysis reveals boundary precipitates with increased levels of chromium, molybdenum and silicon. Studies clearly show that the 316LN grains in the material microstructure are elongated along the dominating heat transfer paths, which may or may not coincide with the build direction. Lattices made from a relatively ductile material, like 316LN, are much less susceptible to catastrophic collapse and show an extended range of elastic and plastic deformation. Tests indicate that EBM process for 316LN is stable allowing for both solid and lightweight (lattice) structures.

  • 155.
    Rosenqvist, Joel
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Applicering utav additiv tillverkning: Ett utredande arbete för HPG AB2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 156.
    Rännar, Lars-Erik
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Olsén, Jon
    Stockholm University, Arrhenius Laboratory.
    Saeidi, Kamran
    Stockholm University, Arrhenius Laboratory.
    Shen, Zhijian
    Stockholm University, Arrhenius Laboratory.
    Hierarchical structures of stainless steel 316L manufactured by Electron Beam Melting2017In: Additive Manufacturing, ISSN 2214-8604, Vol. 17, p. 106-112Article in journal (Refereed)
    Abstract [en]

    One of the serious obstacles preventing wide industrial use of additive manufacturing (AM) in metals and alloys is a lack of materials available for this technology. It is particularly true for the Electron Beam Melting (EBM®) process, where only a few materials are commercially available, which significantly limits the use of the method. One of the dominant trends in AM today is developing processes for technological materials already widely used by other methods and developed for other industrial applications, gaining further advantages through the unique value added by additive manufacturing. Developing new materials specifically for additive manufacturing that can utilize the properties and specifics of the method in full is still a research and development subject, and such materials are yet far from full scale industrial usage. Stainless steels are widely used in industry due to good mechanical properties, corrosion resistance and low cost of material. Hence, there is potentially a market for this material and one possible business driver compared with casting for example is that lead times could be cut drastically by utilizing an additive approach for one-off or small series production. This paper presents results from the additive manufacturing of components from the known alloy 316L using EBM®. Previously the samples of 316L were made by laser-based AM technology. This work was performed as a part of the large project with the long term aim to use additively manufactured components in a nuclear fusion reactor. Components and test samples successfully made from 316L stainless steel using EBM® process show promising mechanical properties, density and hardness compared to its counterpart made by powder metallurgy (hot isostatic pressing, HIP). As with the other materials made by EBM® process, 316L samples show rather low porosity. Present paper also reports on the hierarchical microstructure features of the 316L material processed by EBM® characterized by optical and electron microscopy. 

  • 157.
    Rännar, Lars-Erik
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Koptyug, Andrey
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Bäckström, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Jönsson, Anders
    NOVA Innovation Solutions.
    Water jet polishing of materials manufactured with electron beam melting technology2016Conference paper (Refereed)
  • 158.
    Sandvik Wiklund, Pia
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Wiklund, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    Increased focus on results and control instead of processes and enhancement: its impact on TQM in higher education2003In: Proceedings of The Sixth Quality Management and Organisational Development Conference (QMOD 2003) Paris, France 1-3 october 2003 - Paris, 2003Conference paper (Refereed)
  • 159. Sandvik Wiklund, Pia
    et al.
    Wiklund, Håkan
    Karlsson, S
    Continuous improvement through company-collage collaboration1997In: The 1997 learning edge conference. /von European Foundation for Quality Management., Brusseles: European Foundation for Quality Management , 1997, , p. 64-75Conference paper (Other academic)
  • 160.
    Schelin, Andreas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Fotstyrning till skicart2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 161.
    Schieber, Erika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Längdskidställ: En jämförande textilstudie för Sweare2016Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The project was carried out as a thesis during the last semester at the Sports Technology program.  The work has been done on behalf of Sweare and is a comparative textile study. The aim was to compare textiles for new cross country ski clothing, adapted for low temperatures and harsh weather. The main feature of the project was a textile study where tests on the fabrics were conducted in the textile laboratory at the Mid Sweden University and physical tests carried out by volunteers on roller skis in the wind tunnel at the Mid Sweden University. The goal of the project was to suggest appropriate choice of textiles for the new clothes, based on the results of the tests in the textile laboratory and the wind tunnel. The project was done using the agile method with the phases feasibility study, planning, execution, handover and implementation. The tests in the textile laboratory were carried out according to ISO standards in regards to the fabric’s characteristics in durability and function. The physical tests were carried out in regards to moisture and temperature during physical work. The method for the physical tests was designed during the project by the student together with Sweare and supervisor Mats Ainegren. The results from the textile laboratory vas uncomplicated to read and interpret while the results from the wind tunnel required some processing in order to be properly analyzed and interpreted. The aim and goal with the project was achieved with the conclusion that the fabrics technical characteristics can be separated by the results from the textile study.  The results from the measurements of moisture and temperature in the wind tunnel strengthens the corresponding result from the measurement in water vapor passage in the textile laboratory. The fabrics with the best ability to transport moisture have a lower temperature during the physical tests while the fabrics which became most humid were warmer. The suggested choice of fabrics takes all the results from the test into account and the fabrics recommended are considered to be the ones best suited for this purpose.

  • 162.
    Silverdahl, Viktoria
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Produktutveckling av ett friluftsbestick: Framtagande av nytt produktkoncept åt Trangia AB2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Det familjeägda   friluftsvarumärket Trangia är inne i en förändringsfas. Deras nya målsättning   är att fördubbla företagets omsättning på 5 år med bibehållen lönsamhet för   att säkra företagets fortsatta tillväxt. Målstyr-ningen riktas mot att växa   ytterligare på befintliga marknader, utveckla fler produkter och även bredda   sortimentet med nya produkter.

    Målet med examensarbetet har   varit att ta fram ett produktkoncept på ett friluftsbestick åt Trangia. Ett   koncept som om det tas vidare ska kunna bidra till ett hållbart växande för   företaget gällande sociala, ekologiska och ekonomiska aspekter. Detta har   uppfyllts genom framtagandet av produktkoncept Tora 1.0. Tora 1.0 är ett   friluftsbestick i form av en spork där gaffel och sked i vardera änden av   besticket är fullstora ätredskap. Tora 1.0 har utformats till att vara ett   ergonomiskt och hållfast friluftsbe-stick. Produktens formspråk präglas av   dess funktion och är i en stilren, enkel och tidlös design. Detta har   uppnåtts genom omfattande formana-lyser av besticket. Handgrepp och   kontaktpunkter mellan hand och be-stick har studerats. Genom bockning och val   av måttsättning har förstyv-ande geometrier arbetats fram. Hållfastheten och   ergonomin har testats och omarbetats genom många prototyptester.   Idégenereringen har föru-tom genom kreativa och systematiska metoder främst   framskridit genom dessa fysiska prototyper i form av lermodeller,   3D-utskrifter och CAD-modeller. Valen som har gjorts i projektet har tagits   fram genom en be-slutsmatris och diskussion med Trangia om måluppfyllelsegrad   av upp-rättad kravspecifikation.

    Projektet har värnat om   Trangias värden ”trygghet”, ”långsiktighet” och ”kvalitet”. Det har gjorts   genom att ställa höga krav på att tillverkningen ska kunna ske i Trangias   produktion i Trångsviken, Jämtland.

    Innan Tora 1.0 kan sättas i produktion behöver   användartester göras, konstruktionen säkerhetsställas och en omfattande   kostnadskalkyl beräknas.

  • 163.
    Skoglund, Per
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
    Underbensprotes: Aktiv protes för klassisk längdskidåkning2012Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
  • 164.
    Skoglund, Per
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Botero Vega, Carlos Alberto
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Rännar, Lars-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Bäckström, Mikael
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Possibility of the “cold start” of the build in Electron Beam Melting2018Conference paper (Refereed)
  • 165.
    Sundelin, Niklas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Produktionsoptimering av Fladder-avgradningssystem: Framtagning av layout för materialhanteringen runt   Fladder-avgradningssystem2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The bachelor   thesis was performed to investigate how material handling around the   deburring system Fladder can be developed and automated. The reason is due to   today's manual handling which is inefficient and time consuming and therefore   needs to be optimized.

    The work was   carried out with methodology from the product development process to offer   layout suggestions on how material handling can be improved. First, a   feasibility study was conducted in which a data collection, literature study   and current situation analysis were done to identify the needs. Concepts were   generated based on the requirements of the system and through various   decision matrices, two solutions were chosen for further development. The   solutions were reviewed and analyzed in more detail and calculations of their   efficiency and profitability were made.

    The solutions   were refined and resulted in two layouts on how the material handling can be   improved. The first concept is a simple system for the situation today and   the second concept is a more advanced solution for future investments.

  • 166.
    Sundström, David
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    On a bioenergetic four compartment model for human exercise2016In: Sports Engineering, ISSN 1369-7072, E-ISSN 1460-2687, Vol. 19, no 4, p. 251-263Article in journal (Refereed)
    Abstract [en]

    Bioenergetic models for exercise performance simulations and pacing strategy optimizations currently lag behind empirical knowledge in human bioenergetics. Therefore, the objective of this study was the construction of a four compartment bioenergetic model that incorporates separate oxidative phosphorylation of lipids and carbohydrates and describes the regulation of these energy substrates’ utilization. Furthermore, the aim was also to model efficiency and the impact of muscle fatigue and the force-velocity relationship on the maximal attainable rate of energy expenditure. The model was formulated with five systems of differential equations that regulated the fluid levels in three of the compartments, while the lipid compartment energy was kept constant. Regulations had to be imposed on the system of compartments to achieve the desired carbohydrate dependent functionality and efficiency of the model. Equilibrium equations were modeled for the alactic compound composition and a constraint was modeled for the maximal energy expenditure rate, dependent on the intramuscular inorganic phosphate. A separate force-velocity relationship was modeled to constrain power output at low speeds and efficiency was modeled with a linear but off-set relationship between power output and rate of energy expenditure. The relative aerobic contribution to total energy expenditure showed good congruence with empirical results, while time to exhaustion was overestimated due to the constraint on maximal rate of energy expenditure. Therefore, further experimental studies are necessary for complete validation of the model.

  • 167.
    Sundström, David
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Carlsson, Peter
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Tinnsten, Mats
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Comparing bioenergetic models for the optimisation of pacing strategy in road cycling2014In: Sports Engineering, ISSN 1369-7072, E-ISSN 1460-2687, Vol. 17, no 4, p. 207-215Article in journal (Refereed)
    Abstract [en]

    Road cycling performance is dependent on race tactics and pacing strategy. To optimise the pacing strategy for any race performed with no drafting, a numerical model was introduced, one that solves equations of motion while minimising the finishing time by varying the power output along the course. The power output was constrained by two different hydraulic models: the simpler critical power model for intermittent exercise (CPIE) and the more sophisticated Margaria–Morton model (M–M). These were compared with a constant power strategy (CPS). The simulation of the three different models was carried out on a fictional 75 kg cyclist, riding a 2,000 m course. This resulted in finishing times of 162.4, 155.8 and 159.3 s and speed variances of 0.58, 0.26 and 0.29 % for the CPS, CPIE and M–M simulations, respectively. Furthermore, the average power output was 469.7, 469.7 and 469.1 W for the CPS, CPIE and M–M simulations, respectively. The M–M model takes more physiological phenomena into consideration compared to the CPIE model and, therefore, contributes to an optimised pacing strategy that is more realistic. Therefore, the M–M model might be more suitable for future studies on optimal pacing strategy, despite the relatively slower finishing time.

  • 168.
    Surmeneva, Maria A.
    et al.
    Natl Res Tomsk Polytech Univ, Russia.
    Surmenev, RomanA.
    Natl Res Tomsk Polytech Univ, Russia.
    Chudinova, Ekaterina A.
    Natl Res Tomsk Polytech Univ, Russia.
    Koptioug, Andrei
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Tkachev, Mikhail S.
    Natl Res Tomsk Polytech Univ, Russia.
    Gorodzha, Svetlana N.
    Natl Res Tomsk Polytech Univ, Russia.
    Rännar, Lars-Erik
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Fabrication of multiple-layered gradient cellular metal scaffold via electron beam melting for segmental bone reconstruction2017In: Materials & design, ISSN 0264-1275, E-ISSN 1873-4197, Vol. 133, p. 195-204Article in journal (Refereed)
    Abstract [en]

    The triple-and double-layered mesh Ti-based alloy scaffolds were successfully fabricated using electron beam melting (EBM). In this study Ti-based alloy cylindrical scaffolds with different 3D architectures intended for the segmental bone defect treatment were systematically compared. All lattice-like scaffolds were additively manufactured using EBM technology from Ti6Al4V to mimic the structures of human trabecular bone. Cylindrically-shaped lattice scaffolds (outer diameter of 15 mm and length of 35 mm) of five different types were designed and manufactured. Four types were tubular with inner hole diameter of 5 mm and two lattice layers of different density. Fifth type was cylindrical with three lattice layers of different density. In all samples outer lattice layer was most dense, and inner layers-least dense. Mechanical properties of scaffolds were determined by conducting uniaxial compression testing. The strain-stress curves for all samples with gradient porosities showed considerable ductility.

  • 169.
    Swarén, Mikael
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Danvind, Jonas
    Holmberg, Hans-Christer
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Acceleration of the head during alpine skiing2012In: Science and skiing V / [ed] Erich Müller, Stefan Lindinger, Thomas Stöggl, Meyer & Meyer Sport, 2012, p. 443-451Chapter in book (Refereed)
  • 170.
    Swarén, Mikael
    et al.
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences. Department of Mechanics, Royal Institute of Technology, Stockholm, Sweden.
    Holmberg, Hans-Christer
    Mid Sweden University, Faculty of Human Sciences, Department of Health Sciences.
    Eriksson, Anders
    Department of Mechanics, Royal Institute of Technology, Stockholm, Sweden.
    Repeated low impacts in alpine ski helmets2013In: Sports Technology, ISSN 1934-6182, E-ISSN 1934-6190, Vol. 6, no 1, p. 43-52Article in journal (Refereed)
    Abstract [en]

    Alpine ski race helmets are subjected to multiple impacts during a race caused by the skiers hitting the gates on their way down the course. This study investigated the difference between expanded polystyrene (EPS) and expanded polypropylene (EPP) cores in alpine ski race helmets when subjected to repetitive violence, caused by alpine slalom gates. A special test rig was developed where a rotating slalom pole impacted the helmets with a velocity of 13.3 m·s− 1. All helmets (six EPS and six EPP) were attached to a headform, monitored with a triaxial accelerometer at the center of mass. Each helmet sustained 1000 impacts and acceleration data were collected around every 200 impacts. No significant differences were observed between the first hit and after 1000 hits for either the EPS or the EPP helmets. However, the total group mean acceleration and mean peak acceleration were 15% and 16% higher, respectively, for the EPS series compared with the EPP series. Also, all EPS helmets showed cracked cores after 1000 impacts compared with 1 cracked EPP core. Findings suggest that EPP cores might be more suitable for absorbing multiple low impacts caused by alpine gates and that repeated violence is a relevant parameter to consider when constructing alpine ski race helmets.

  • 171.
    Söderström, Caroline
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
    Hamberg, Katarina
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
    Kapell till turpulka: Färdigställande av transportkapell med unik infästning2011Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    With the main purpose that

    Segebadenpulkan is to have a groundbreaking new touring pulk for sale in the fall of 2011, a bachelor’s thesis has been accomplished with the main goal to finish a cover for this pulk. This report is part of the result of the bachelor’s thesis. Two cover prototypes were developed and tested during a nine day winter expedition in the Sarek national park. After evaluating the test a new, unique pulk cover was developed. The predefined textile was tested for water resistance, air permeability, abrasions resistance and washing. The textile proved to have good water and abrasion resistance and low air permeability. The abrasion resistance and the air permeability showed no difference after the textile was washed repeatedly while the water resistance was impaired significantly. Sewing patterns and pattern placement for cutting the textile have been produced and the amounts of waste have been calculated. Manufacturers and suppliers have been contacted which have resulted in a component register that will make it easy for Segebadenpulkan to move forward with the production. Preliminary calculations of material costs for one pulk cover have been made showing numbers between 300 and 400 SEK.

  • 172. Tang, X Y
    et al.
    Goh, T N
    Wiklund, Håkan
    Tool wear monitoring using double exponential smoothing forecast1998In: Proceedings of the 3rd International Workshop on Reliability Modelling and Analysis, 1998, p. 56-63Conference paper (Other academic)
  • 173. Tang, X Y
    et al.
    Xie, M
    Goh, T N
    Wiklund, Håkan
    Process Monitoring Using Double Exponential Smoothing Technique with an Application to Tool Wear Processes1999In: Control of Industrial Processes, 1999, p. 194-199Chapter in book (Other academic)
  • 174. Tang, X. Y.
    et al.
    Xie, M.
    Goh, T. N.
    Wiklund, Håkan
    Statistical Monitoring and Decision-Making of Tool Wear Processes1999In: Proceedings of the First International Symposium on Industrial Statistics, Linköping, Sweden, August, 1999, International Statistical Institute , 1999Conference paper (Other academic)
  • 175.
    Therell, Mikael
    et al.
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
    Karlsson, Andreas
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering and Sustainable Development.
    En jämförande studie av längdskidåkningsstavar: avseende pendelvikt, vikt och styvhet2011Independent thesis Basic level (degree of Bachelor), 15 credits / 22,5 HE creditsStudent thesis
  • 176.
    Thor, Erica
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics. Ableway AB.
    Utveckling av lätthanterlig ispigg till kryckor: Ett produkutvecklingsarbete för Ableway AB2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 177.
    Tillberg, Emil
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Controller Area Network: Möjlig CAN-buss lösningar inom entreprenadbranschen2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The   company engcon Nordic AB produces equipment for the construction industry,   where the product called tiltrotator is the heart of their business. To   improve the use and simplify the installation, a literature study has been   made that looks at two parts, first the function around CAN bus as the basis   for a communication system and secondly various higher layer protocols (HLP)   built on top of CAN. Why CAN bus was created and how the system works is   important to understand in order to look at these overlying layers, called   HLP (Higher Layer Protocol), which provides a kind of machine-human interface   to work with. Different types of HLP can be J1939, ISOBUS or other. CAN bus   is the de facto standard for vehicle networks where ECUs (Electronic Control   Unit), called nodes, communicating on a common communication network, called   bus. To do this, an ingenious technique has been developed to prioritize   messages between nodes, which provides data loss-free arbitration. In CAN an   advanced technique for error detection on the communication has been applied,   and gives CAN the robustness to be applied in tough environment. As for various   HLPs, a large number of these are available in different industries. Every   one of these HLP has a common that they try to build a more or less user-friendly   interface that can be implemented on top of CAN. For example, in the   agricultural industry, the use of ISOBUS is common, which is an industrial   standard that goes beyond competition to build a simple, user-friendly system   that benefits the customer to the best possible extent. In automation,   instead, CANopen is used, which is an open system that allows high   interoperability between different units with so-called profiling. One last   system used in a number of industries is called CanKingdom and is the most   adaptable system in this project. In order to find out more industry-specific   information about solutions and problems, an interview study was also   conducted within the project. Here, various people were interviewed, active   in different companies that are involved in CAN-based systems. This was done to   look at relevant problems in their specific area.

    As a   result, four options are specified which the project owner should look at in   order to find a system that suits them. It is based on alternatives that   either require access to the existing J1939 bus, or to build a more or less   adapted model built on ISOBUS, CANopen or CanKingdom.

  • 178.
    Troynikov, Olga
    et al.
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Wardiningsih, Wiah
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Koptyug, Andrey
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Watson, Chris
    RMIT University, School of Fashion and Textiles, Melbourne, Australia.
    Oggiano, Luca
    The Norwegian University of Science and Technology, Trondheim, Norway.
    Influence of Material Properties and Garment Composition on Pressure Generated by Sport Compression Garments2013In: Procedia Engineering, ISSN 1877-7058, E-ISSN 1877-7058, Vol. 60, p. 157-162Article in journal (Refereed)
    Abstract [en]

    Sports compression garments (SCG) have been used by athletes for years as means of enhancement of theirperformance and speed of recovery. In this research, the investigation into the effects the physical attributes ofsuitable materials and their composition and orientation in SCG have upon the amount and distribution of pressuregenerated to the underlying body was undertaken. Two different knitted fabrics suitable for compression sportgarment with different physical properties and elastic performance attributes were chosen. Experimental fabricsleeves were assembled, so that they provided different fabric strains around the circumference of the differentdiameter of cylinders they were placed on. The pressure generated by sleeves was measured using Salzmannpressure-measuring device MST MK IV and Salzmann MST 2007 software. It was determined that different materialcomposition of fabric assemblies influenced the pressure delivery of garment. However no clear relationship betweenthe fabric percentage in assembly composition and the generated pressure was established.

  • 179.
    Viberg, Olov
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Beräkning på översträckning av skruv i samband med lossning: En studie av Nord-Locks kamlåsbrickor2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [sv]

    Nord-Lock är ett företag som tillverkar   kamlåsbrickor till skruvförband. Dessa brickor låser skruvförbandet   geometriskt och för att lossning ska kunna ske krävs det att skruven töjs   något. I detta arbete har den töjningen undersökts för att fastställa om det   föreligger risk för att skruven går sönder vid användande av korta   skruvlängder i kombination med Nord-Locks låsbrickor. Detta görs för att ta   fram riktlinjer till Nord-Locks framtida produktutveckling samt att verifiera   brickornas funktion. Arbetet har bestått av teoretiska beräkningar samt   praktiska mätningar. De praktiska mätningarna har gjorts på brickornas   deformation efter lossning och på den kraftökning skruven upplever vid   lossning. Detta har gjorts för att kontrollera den kvarvarande kamhöjden samt   den egentliga kraftökning som orsakas av töjningen.  Resultatet av de teoretiska beräkningarna   och de praktiska mätningarna skiljer sig åt, därför görs ansatser för att korrigera   de formler som använts. Intressanta områden för vidare undersökning   identifieras då intryckningen av brickan i underliggande material bortsetts   från i denna studie men tycks ha stor inverkan på skruvens totala   kraftökning. Resultatet av studien visar att för stora toleransgränser vid tillverkning   av kamlåsbrickor kan leda till att risken för att skruven går sönder ökar   kraftigt. Detta sker då väldigt små töjningar orsakar stor spänning i   skruven. Risken för att skruven går sönder vid verklig användning är dock   liten då en stor del av den töjning som krävs tas upp i deformationer i   brickan samt underliggande material. Störst risk föreligger vid användning av   små skruvdimensioner då dessa är känsligare för spänningsökning.

  • 180.
    Wallin Berg, Ida
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Framtagning och applicering av förbrukningsindikator på fuktabsorbent: Ett produktutvecklingsarbete för Smellwell AB2018Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    This bachelor thesis has been carried out on behalf of Smellwell AB and aims at product development of their product. Smellwell manufactures and sells moisture absorbing bags with a fresh scent for use in shoes and sports equipment. The aim of this work was to produce and apply a consumption indicator to their moisture absorbers. Today it is difficult to determine when the product is consumed, which can lead to many customers using the product for to long. This can lead to a poorer user experience. The purpose of the work is therefore to increase customer value by offering the customer a way to always know when it is time to replace their product for maximum effect. The problem was divided into two sub-problems that were resolved separately. First, an appropriate indicator was developed and three application methods were created through a product development process. In the process of developing the application methods two different 3D-printers were used, a Makerbot Replicator+ and an Objet Eden 260v. The work resulted in a 6-month’s time indicator from the English company Timestrip® UK Ltd and three different holders for application at different positions on the moisture absorber. The results have been evaluated by a focus group and proposals for cost and future manufacturing methods have been specified Concept 2 and Concept 3 got the best rating in the evaluation and will be recommended to Smellwell to proceed with.

  • 181.
    Wallin, Erika
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Management and Mechanical Engineering.
    Dimensionering av stållina: Utredning av ersättningslina till JAS Gripens   hissdon2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The aim of this   project has been to find a replacement for the steel wire rope 8×17 + 5×7-FC,   as that wire rope is no longer manufactured. The wire rope is used in a   hoisting gear which is a mainenance equipment for the JAS 39 Gripen aircraft.   The project has also included a mapping of new swaged terminals for the wire   rope.

    The “Agile” methodology was used for the project management. The project started with a mapping of the different stakeholders and their needs, to clearify their expectations and the goals of the project. Standards, litterature and information from manufacturers was used for analyzing the hoisting gear and its steel wire rope.

    A classification   of the hoisting gear was performed, based on its service conditions. The   classification was then used to specify design factors and selection factors   according to the standard ISO 16625:2013 (E). A selection of steel wire ropes   was then compared based on main causes of deterioration of a hoist rope, and   also the different require-ments made by the stakeholders. The comparison was   weighted and the weakest wire ropes in the selection were eliminated. After   that the three most promising options were compared. The steel wire rope that   scored the highest points in the final comparison is a regular lay rope with   a steel wire core:

    6×19M-WSC.

    The mapping of   swaged end terminals and lifting hooks indicates that there are no standard   components that will fit the hoisting gear. In order to produce a complete   solution for the steel wire rope application a more thorough investigation   regarding swaged end terminals and lifting hooks needs to be made.

  • 182.
    Werner, Emil
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Quality Technology and Management, Mechanical Engineering and Mathematics.
    Säkerhetstelease till sitski i släplift: Ett produktutvecklingsarbete för Totalskidskolan2015Independent thesis Basic level (university diploma), 10 credits / 15 HE creditsStudent thesis
  • 183. Wiklund, Håkan
    A graphical method for indicating critical curve slope1991Report (Other academic)
  • 184.
    Wiklund, Håkan
    Mid Sweden University, Faculty of Science, Technology and Media, Department of Engineering, Physics and Mathematics.
    A New Type of Quality Management2003Other (Other academic)
  • 185. Wiklund, Håkan
    A statistical approach to real-time quality control1999In: International Journal of Production Research, ISSN 0020-7543, E-ISSN 1366-588X, Vol. 37, no 18, p. 4141-4156Article in journal (Refereed)
    Abstract [en]

    Modern manufacturing processes characterized by short series, complex part geometry and high refinement values often demonstrate conditions when traditional quality control (QC) methods do not work properly. This paper presents a prototype system for real-time QC where the developed methods and applications are integrated and post-process quality control is applied only as a complement and for reference measurements. All activities are supervised and fed with information from a developed active data acquisition system. The proposed concept contributes to bridging the gap between traditional post-process control and realtime QC of machining processes.

  • 186. Wiklund, Håkan
    An Approach to the Evaluation of Price Influence in Conjoint Analysis1999Report (Other academic)
  • 187. Wiklund, Håkan
    Application of Organisational Learning Principles for Quality Improvement in Manufacturing2000Report (Other (popular science, discussion, etc.))
  • 188. Wiklund, Håkan
    Bayesian and regression approaches to on-line prediction of residual tool life1996Report (Other academic)
  • 189. Wiklund, Håkan
    Bayesian and Regression Approaches to On-Line Prediction of Residual Tool Life1998In: Quality and Reliability Engineering International, ISSN 0748-8017, E-ISSN 1099-1638, Vol. 14, no 5, p. 303-309Article in journal (Refereed)
  • 190. Wiklund, Håkan
    Contiunual improvement trough student participation1999In: Productivity & quality management frontiers VIII: Refereed papers presented at the Eighth International Conference on Productivity & Quality Research, June 14-16, 1999, Vaasa, Finland, West Yorkshire, England: MCB University Press , 1999, p. 246-252Conference paper (Other academic)
  • 191. Wiklund, Håkan
    Design of Experiments Applied on Acoustic Emission Measurements1991Report (Other academic)
  • 192. Wiklund, Håkan
    Development of mathematical models for control of machining processes1991Licentiate thesis, monograph (Other academic)
  • 193. Wiklund, Håkan
    Development of Mathematical Models for Data Acquisition, Reliability Evaluation and Process Monitoring, and Process Modelling - Predictability and Reliability1996In: Proceedings. Conference on Technologically Integrated Manufacturing Systems, 1996, p. 39-45Conference paper (Refereed)
  • 194. Wiklund, Håkan
    Development of Mathematical Models for Monitoring and Quality Control of Machining Processes1999In: Proceedings of the 3rd Conference on Technologically Integrated Manufacturing Systems, 1999, p. 109-124Conference paper (Other academic)
  • 195. Wiklund, Håkan
    Development of Methods for Quality Control in a Zeiss PMCV-850 CNC Coordinate Measuring Machine1991Report (Other academic)
  • 196. Wiklund, Håkan
    Högteknologisk tillverkning kräver ny kvalitetsstyrning.1996In: Magasinet Verkstäderna, ISSN 1402-0270, Vol. 92, no 5, p. 25-26Article in journal (Other (popular science, discussion, etc.))
  • 197. Wiklund, Håkan
    Improvement of the Reliability and Predictability of Machining Process Data1998In: Proceedings of the 2nd National Conference on Technologically Integrated Manufacturing Systems, 1998, p. 46-59Conference paper (Other academic)
  • 198. Wiklund, Håkan
    Improvement of Tool Life Prediction by Utilization of In-Process Information1996Report (Other academic)
  • 199. Wiklund, Håkan
    Machining process monitoring: a statistical approach1995Doctoral thesis, monograph (Other academic)
  • 200.
    Wiklund, Håkan
    Measurements in CNC Coordinate Measuring Machines1990Report (Other academic)
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