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Mehanske lastnosti ergonomsko oblikovanega ročaja lopate iz različnih slojnatih lesnih kompozitov : diplomsko delo = Mechanical properties of ergonomic handle for showel produced by different wooden layer composites : B. Sc. thesisSušnik, EvgenUgotavljali smo mehanske lastnosti ergonomsko oblikovanega ročaja lopate iz vezane plošče, letalske plošče, slojnatega furnirnega lesa LVL in krivljenega slojnatega furnirnega lesa. Plošče smo ... izdelali iz bukovega furnirja debeline 1,2 mm in dimenzij 1300 mm * 430 mm. Prečne furnirje pri vezani plošči smo najprej razžagali in jih širinsko spojili z nitko. Prav tako smo spojili furnirje pri letalski plošči, kjer je bil kot med sosednjima furnirjema 26° in s tem zmanjšali ostanek materiala. Končna debelina 27 slojnih plošč je bila 32,5 mm. Za krivljen slojnat furnirni les smo najprej na CNC stroju izrezali model iz MDF materiala in posamezne dele s pomočjo moznikov in lepila spojili skupaj. Za lepljenje vseh slojnatih lesnih kompozitov smo uporabili eno komponentno poliuretansko lepilo ICEMA R 145/12. Nato smo iz vsakega kompozita naredili po 5 ročajev in testirali njihove mehanske lastnosti. Ker se snežne lopate uporabljajo predvsem pri nizkih temperaturah, smo 2 ročaja testirali pri -18 °C, 2 pa pri sobni temperaturi 22 °C. Ugotovili smo, da nižja temperatura poviša mehanske lastnosti lesa, saj so bile izmerjene sile večje. Največje sile je prenesel krivljen LVL ročaj, sledil mu je ročaj iz letalske plošče, medtem ko sta ročaja iz vezane plošče in LVL zdržala najmanj in približno enako. Testirali smo tudi aluminijasti ročaj, ki se sicer trenutno prodaja na trgu. V primerjavi s slojnatimi lesnimi kompoziti prenese manjše obremenitve, ima pa večji elastični modul..Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [E. Sušnik], 2018Language - slovenianCOBISS.SI-ID - 2945417
Author
Sušnik, Evgen
Other authors
Šernek, Milan |
Medved, Sergej
Topics
ergonomski ročaj |
furnir |
bukev |
ergonomic handle |
veneer |
beech
Library | Call number – location, accession no. ... | Copy status |
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BF, Dept. of Wood Technology, Lj. | Knjižnica BF za lesarstvo du1 86 IN: 020180154 |
available - reading room |
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Sušnik, Evgen | |
Šernek, Milan | 16382 |
Medved, Sergej | 15410 |
Source: Personal bibliographies
and: SICRIS
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