BF, Dept. of Wood Technology, Lj. (BFLES)
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Analiza vakuumskega vpenjanja obdelovancev : diplomsko delo (univerzitetni študij) = Analysis of vacuum clamped workpieces : graduation thesis (university studies)Zidar, RobertVakuumsko vpenjanje je eden najpogostejših načinov vpenjanja obdelovancev na CNC obdelovalnih centrih. Gre za hiter, enostaven in poceni način vpenjanja. Težava nastopa pri obdelavi manjših ... obdelovancev. Treba je zagotoviti, da se obdelovanec tekom obdelave ne premakne. Velikost prisesne ploskve vpliva na silo vpetja in s tem neposredno tudi na silo potrebno za zdrs obdelovanca. Dopustna zunanja obremenitev je odvisna od smeri delovanja in prijemališča. Analizirali smo vpliv oblike in velikosti obdelovancev na največjo dovoljeno zunanjo silo, ki lahko deluje na vakuumsko vpet obdelovanec. Izpeljali smo teoretičen postopek izračunavanja najvišje dovoljene podajalne hitrosti. Z meritvami sile, potrebne za zdrs obdelovanca, smo na stroju za testiranje mehanskih lastnosti potrdili hipotezo, da se največja dopustna zunanja sila vakuumsko vpetih vitkih obdelovancev spreminja glede na točko prijemališča. Vzdolž obdelovanca (x-smer) sila zdrsa v prečni (y) smeri od začetka obdelovanca do njegove sredine narašča, nato pa proti koncu obdelovanca zopet pada. Dopustna zunanja obremenitev se od sredine proti koncema obdelovanca zmanjšuje, ker se takrat pojavi moment sile okoli osi, vzporedne z-osi, potekajoče skozi masno središče obdelovanca. Dopustna zunanja sila se z višanjem točke delovanja na obdelovancu zmanjšuje, ker na obdelovanec delujejo sile, ki ga hočejo zvrniti. Dopustna podajalna hitrost od začetka obdelovanca proti sredini njegove dolžine narašča, proti koncu obdelovanca pa zopet upada.Type of material - undergraduate thesis ; adult, seriousPublication and manufacture - Ljubljana : [R.Zidar], 2002Language - slovenianCOBISS.SI-ID - 864393
Author
Zidar, Robert
Other authors
Bučar, Bojan |
Medič, Marijan
Topics
vakumsko vpenjanje |
CNC |
prodajalna hitrost |
obdelovanec |
zdrs |
zvračanje |
vacuum clamping |
CNC |
feed |
workpiece |
slipping |
tilting
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Knjižnica BF za lesarstvo dn 0000000732 IN: 020020144 Knjižnica BF za lesarstvo dn 732 IN: 020020144 |
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Database name | Field | Year |
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Bučar, Bojan | 01392 |
Medič, Marijan | 11925 |
Source: Personal bibliographies
and: SICRIS
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