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Improvement of positional accuracy of precision micro milling centre using pitch error compensation
Mijušković, Goran (Author), Krajnik, Peter (Author), Kopač, Janez (Author)

URLURL - Presentation file, Visit http://hrcak.srce.hr/index.php?show=clanak&id_clanak_jezik=157205 This link opens in a new window

Abstract
An experimental procedure was performed on precision micro milling centre to improve positional accuracy and keep tolerances within the required range for precision manufacturing in tool and die industry. The micro milling processes play an important role in tool and die industry, which is facing increasing demands on global market, namely demands related to positional accuracy and repeatability. Laser interferometer was used for measurements of 3-axis machining centre, where the values for positional accuracy and repeatability were calculated according to ISO 230-2 standard for all three axes. Values of positional accuracy for X- and Y-axes were out of manufacturers tolerance (3 m), while positional repeatability was satisfactory and below 0,7 m for all axes. Based on determined positional errors, correction of pitch error compensation table was performed. The improvement of positional accuracy was significant, with values around 1 m and below. Finally, measurement uncertainty for accuracy and repeatability was estimated for all axes according to the same standard.

Language:English
Keywords:laser interferometer, micro milling, pitch error compensation, positional accuracy and repeatability, precision
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:FS - Faculty of Mechanical Engineering
Year:2013
Number of pages:str. 629-634
Numbering:Vol. 20, no. 4
UDC:621.91(045)
ISSN on article:1330-3651
COBISS.SI-ID:13059867 Link is opened in a new window
Views:541
Downloads:200
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Record is a part of a journal

Title:Tehnički vjesnik
Shortened title:Teh. vjesn. - Stroj. fak.
Publisher:Strojarski fakultet, Elektrotehnički fakultet, Građevinski fakultet
ISSN:1330-3651
COBISS.SI-ID:15346181 This link opens in a new window

Secondary language

Language:Croatian
Abstract:
Na preciznom mikro obradnom centru rabljen je eksperimentalni postupak za poboljšanje pozicijske točnosti i održavanje tolerancija unutar zahtijevanog područja za preciznu proizvodnju u alatnoj industriji. Procesi mikro glodanja imaju važnu ulogu u alatnoj industriji, koja je suočena s povećanim zahtjevima na globalnom tržištu, naime zahtjevi se odnose na pozicijsku točnost i ponovljivost. Laserski interferometar rabljen je za mjerenje 3-osnog obradnog centra, gdje su vrijednosti za pozicijsku točnost i ponovljivost izračunate prema ISO 230-2 standardu za sve tri osi. Vrijednosti pozicijske točnosti za X i Y osi bile su izvan proizvođačeve tolerancije (3 m), dok je pozicijska ponovljivost zadovoljavajuća i ispod 0,7 m za sve osi. Na osnovu utvrđenih pozicijskih pogrešaka napravljena je korekcija tablice kompenzacije pogrešaka koraka. Poboljšanje pozicijske točnosti je značajno, jer su vrijednosti pogreške oko 1 m i ispod. Na kraju je prema standardu procijenjena nesigurnost mjerenja za točnost i ponovljivosti za sve osi.

Keywords:laserski interferometar, mikro glodanje, kompenzacija pogreške koraka, pozicijska točnost, preciznost, ponovljivost

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