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Experimental Study of the Volumetric Error Effect on the Resulting Working Accuracy—Roundness

1
Faculty of Mechanical Engineering, Brno University of Technology, CZ 601 90 Brno, Czech Republic
2
Faculty of Mechanical Engineering, Czech Technical University in Prague, CZ 166 36 Prague, Czech Republic
3
KOVOSVIT MAS Machine Tools, 391 02 Sezimovo Usti, Czech Republic
*
Author to whom correspondence should be addressed.
Appl. Sci. 2020, 10(18), 6233; https://doi.org/10.3390/app10186233
Received: 4 August 2020 / Revised: 3 September 2020 / Accepted: 4 September 2020 / Published: 8 September 2020
(This article belongs to the Section Applied Industrial Technologies)
Currently, various types of software compensations are applied to machine tools. Their aim is to increase the working accuracy of the tools. The improvement in working accuracy is then further assessed according to the increase in the dimensional and shape accuracy or the surface quality of the workpiece. This publication describes the effects of the volumetric accuracy of a machine tool on the working accuracy of a workpiece, where total roundness (RONt) is evaluated in multiple cuts. In the experiment, two test workpieces are manufactured on a three-axis milling machining centre. The first is made using a standard machine setup while the second with activated volumetric compensation. The LaserTRACER self-tracking laser interferometer is used to compensate for volumetric accuracy. In the second part, verification measurements are performed with a Ballbar, where roundness error is evaluated according to ISO 230-4. Then two test workpieces are machined, and, in the last part, measurement is performed on Talyrond 595S roundness measuring equipment. Finally, the results are analysed and the dependence between the volumetric accuracy, the circularity error of the machine and the working accuracy of the CNC machine tool is established, represented by the RONt of the workpiece. This paper presents new and unpublished relations between the volumetric accuracy of the machine tool and the RONt of the workpiece. View Full-Text
Keywords: machine tool error; workpiece quality; machining accuracy; volumetric error; circularity; roundness machine tool error; workpiece quality; machining accuracy; volumetric error; circularity; roundness
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MDPI and ACS Style

Holub, M.; Jankovych, R.; Vetiska, J.; Sramek, J.; Blecha, P.; Smolik, J.; Heinrich, P. Experimental Study of the Volumetric Error Effect on the Resulting Working Accuracy—Roundness. Appl. Sci. 2020, 10, 6233.

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