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Vrednotenje stabilnosti pri struženju v trdo = Evaluation of the stability during hard turningStoić, Antun ; Lucić, M. ; Kopač, Janez, 1949-Prispevek obravnava vrednotenje stabilnosti pri struženju v trdo. Nestabilnosti se pojavijo zaradi spreminjanja globine odrezovanja, neprimernega razmerja sil Fc/Fp, premajhnega polmera konice orodja ... in neenakomernih porazdelitev napetosti v materialu na območju stika orodja z obdelovancem. Ta področja nestabilnosti je moč določiti s spremljanjem postopka, npr.: sile, pospeskov, merjenja zvočne intenzivnosti itn., ali po končanem obdelovalnem postopku z merjenjem hrapavosti, temperature, obrabe itn. V primeru nestabilnega odrezovalnega postopka se sile pri odrezovanju povečajo. Poveča se hitrost obrabljanja orodja, kar neposredno vodi do slabše kakovosti obdelane površine. Zato se je treba izogibati nestabilnemu postopku odrezovanja. Za določevanje oz. ocenjevanje stopnje nestabilnosti so bile v delu izvedeni numerični izračuni in pripadajoči preizkusni testi z uporabo in primerjavo različnih zaznaval spremljanja postopka in tehnike zbiranja podatkov na podlagi osebnega računalnika. V prispevku je prikazano, da se globina odrezovanja med postopkom spreminja za 60 odstotkov v primeru analize geometrijske oblike orodje-obdelovanec. Pri merjenju odrivne sile Fp pa se to nihanje se poveča v primeru premajhne togosti odrezovalnega orodja. Dosežki in ugotovitve tega prispevka so predstavljeni kakovostno in se lahko rahlo razlikujejo pri drugačnih odrezovalnih razmerah (npr.: pri uporabi rezalnega orodja Wiper). Pri odrezovanju v trdo ne glede na to, ali gre za pol fino ali fino obdelavo, ima kakovost obdelane površine izreden pomen. Kakovost obdelane površine je neposredna posledica stabilnosti postopka in neperiodičnosti obremenitve na stiku obdelovanca in orodja. Rezultati prispevka tako pomenijo določitev optimalne globine odrezovanja pri zadnjem prehodu orodja za zagotovitev najmanjse hrapavosti obdelane površine, kar pa je izredno pomembno za dološitev optimalnega rezima obdelovanja.Source: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Letn. 52, št. 11, 2006, str. 723-737)Type of material - article, component partPublish date - 2006Language - slovenian, englishCOBISS.SI-ID - 9777691
Author
Stoić, Antun |
Lucić, M. |
Kopač, Janez, 1949-
Topics
struženje |
stabilnost |
dinamične lastnosti |
globina rezanja |
turning |
stability |
dynamic properties |
cutting depths
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source: Strojniški vestnik = Journal of mechanical engineering. - ISSN 0039-2480 (Letn. 52, št. 11, 2006, str. 723-737)
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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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Stoić, Antun | ![]() |
Lucić, M. | ![]() |
Kopač, Janez, 1949- | 06883 |
Source: Personal bibliographies
and: SICRIS
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