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  • 1.
    Helin, Jonathan
    et al.
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Hellberg, Gustav
    Jönköping University, School of Engineering, JTH, Industrial Product Development, Production and Design.
    Fäste mellan två metallytor: Sammanfogning av två aluminiumytor2019Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
    Abstract [en]

    The degree project has been carried out in collaboration with Husqvarna, a world-leading manufacturer of products for gardening, park and forest management. An ever-evolving industry where innovation and creativity are required to be at the top. With constant demands from customers on performance and quality, a constant mechanical and design developments are required.

    Husqvarna's chainsaws use two-stroke engines where the scavenging channel are covered by a lid which in turn is fastened with screw joints. The channel through which the fuel mixture is pumped is open and a lid is needed to seal the channel. The channel is closed by screw joints, which in turn has a cost related to articles and materials. The lid that is fastened with screw joints has, one step in the production, articles concerning screws and fastening functions in the cylinder. The screw towers located on the cylinder could be an opportunity for improvement regarding weight in order to optimize the product.

    The aim of investigating new fastening methods is to see what possible improvements are available compared to the current method. These include weight reduction, which is very significant for these products. With a thorough literature study on attachment methods, a Pugh-matrix with its own values ​​has been utilized. It has helped to see which concepts are best suited within the weighting framework. The theories are built from scientific manuals within mechanics, strength and joints. With this basis, conclusions have been made regarding the functions that have been investigated and whether they are positive or negative in relation to the current method. The work is meant as a basic basis for Husqvarna, which can facilitate the use of alternative fastening methods for the channel cover.

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