Original scientific paper

Improvement of positional accuracy of precision micro milling center using pitch error compensation

Goran Mijušković ; University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia
Peter Krajnik orcid.org/0000-0002-9362-2196 ; University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia
Janez Kopač ; University of Ljubljana, Faculty of Mechanical Engineering, Aškerčeva 6, 1000 Ljubljana, Slovenia

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 manufacturer’s tolerance (3 μm), while positional repeatability was satisfactory and below 0,7 μm 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 μm and below. Finally, measurement uncertainty for accuracy and repeatability was estimated for all axes according to the same standard.

Keywords

laser interferometer; micro milling; pitch error compensation; positional accuracy and repeatability; precision

Hrčak ID:

106691

URI

https://hrcak.srce.hr/106691

Publication date:

21.8.2013.

Article data in other languages: croatian

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