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  • TOOL WEAR PERFORMANCE EVALU...
    Tratar, Janez; Pusavec, Franci; Kopac, Janez

    Tehnički vjesnik, 08/2014, Letnik: 21, Številka: 4
    Journal Article

    Recent progress in robotics makes robots suitable for many different applications. Beside manipulative and installation applications, which are the most common for robot manipulator, milling can be performed as well. In the near future, robot manipulators, integrated with spindle, proper cutting tool and milling parameters could replace conventional CNC middle toleranced machining, especially for soft material end products. In general, tool life behaviour in milling with robots is not available or studied. Therefore, this work presents the analysis of HSS tool wear in milling MDF (medium density fibreboard) with an anthropomorphic robot. The focus is on the correlation of the tool wear and the workpiece position in the robot operation area. To analyse this, tests were performed in four different positions according to the distance between robot base and test milling position. Results show that increasing distance significantly affects tool wear, on account of vibrations, what shows completely different behaviour than stiff conventional CNC machine tools.Original Abstract: Najnoviji napredak u robotici cini robote pogodne za razlicite potrebe. Osim manipulativnih i instalacijskih aplikacija, koje su najcesce za robotske manipulatore, moze se obavljati i glodanje. U bliskoj buducnosti robotski manipulatori s integriranim vretenom, pravilnim reznim alatom i pravilno odabranima parametrima glodanja, mogli bi zamijeniti konvencionalne CNC strojeve kod srednjih tolerantnih strojnih obrada, pogotovo kod upotrebe mekanih materijala krajnjih proizvoda. U principu, trajanje alata i trosenje tijekom glodanja s robotima nije dostupno ili istrazivano. Stoga, ovaj rad predstavlja analizu HSS trosenja alata tijekom obrade MDF (ploce srednje gustoce) materijala s antropomorfnim robotom. Teziste je na meduodnosu trosenja alata i polozaja izratka u podrucju rada robota. Za tu analizu, ispitivanja su provedena u cetiri razlicita polozaja prema udaljenosti izmedu baze robota i ispitivanog polozaja glodanja. Rezultati pokazuju da porast udaljenosti znacajno utjece na trosenje alata, zbog vibracija, sto pokazuje sasvim drugacije ponasanje od krutih konvencionalnih CNC strojeva.