Manuellt driven timmertransportör till privat sågverk: Framtagning av koncept
Independent thesis Basic level (professional degree), 10 credits / 15 HE creditsStudent thesisAlternative title
Manually operated timber transporter for private sawmills (English)
This thesis aims to develop a workable concept for a timber transporter to ease up the work with managing the log transport to and from a sawmill in Nyland, this with only the power source of one person. The thesis is based on a requirement specification that was defined in collaboration with the client.
The work began by analysing the scope and then a survey of commercial solutions was analysed, after that a creative process resulted in concept sketches. Different designs on the timber carrier were made and then by a selection one design concept was drawn up in a CAD software. Through specific construction materials, certified by ISO 9001 standards, and analysis of specific load cases on the timber carrier, the strength was theoretically calculated and verified. These results were then compared with the results of a FE-analysis made by a FEM software. This method enables to investigate the critical points more closely by comparing the computer calculations with the manual calculations, which helps to form a deeper understanding of structural strength for the timber carrier. In this particular case, the results showed decent matching values.
This work resulted in a timber wagon on rails. It can handle the largest log the saw in Nyland probably can handle without any problems, i.e. a log with a diameter of 0.7 meters and 6.5 meters in length, with a weight of about 1.3 tonnes. The timber transporter can withstand loads up to 15 tons over hundred thousand load cycles. The fatigue calculations show that the welds and the design have a very long lifespan.
Place, publisher, year, edition, pages
2015. , 48 p.
, MA, 1446
IdentifiersURN: urn:nbn:se:umu:diva-107940OAI: oai:DiVA.org:umu-107940DiVA: diva2:849849
Extern beställare, Tommy Hedlund, Umeå
Subject / course
Bachelor of Science Engineering in Mechanical Engineering
Rönnbäck, Sven, Universitetslektor
Schedin, Staffan, Universitetslektor