Selected Aspects of Precision Machining on CNC Machine Tools
Author:
Peterka Jozef1ORCID, Kuruc Marcel1ORCID, Kolesnyk Vitalii2ORCID, Dehtiarov Ivan2, Moravcikova Jana1ORCID, Vopat Tomas1ORCID, Pokorny Peter1ORCID, Jurina Frantisek1, Simna Vladimir1
Affiliation:
1. Faculty of Materials Science and Technology, Slovak University of Technology in Bratislava, Jána Bottu Str., 25 No., 917 23 Trnava, Slovakia 2. Department of Manufacturing Engineering, Machines and Tools, Sumy State University, Rymskogo-Korsakova Str., 2, 40007 Sumy, Ukraine
Abstract
The work is new due to the type of process used—ultrasonic precision machining—to determine the possible effect of spindle heating (long-term machining) on the precision of the flat surface. It was carried out on a precise ultrasonic machining machine, and the material of workpiece was ceramic Al2O3. A flat surface was machined. Such an experiment has not been feasible until now. The experiment was divided into two days. On the first day, the machining time was 4 h. It is a long enough time to create a temperature-steady state. On the second day, with a cold tool and cold machine tool, we continued where we left off on the first day. This is how we monitored the accuracy of the dimensions of the workpiece on the plane surface. We have achieved the following: The average interface depth achieved values of 0.007089 mm and 0.003667 mm for cold and heated spindles, respectively. It means that when the spindle is not heated, the depth of the interface is higher by 93% (almost double the depth). The average standard deviation of the interface depth is 0.001683 mm and 0.000997 mm for cold and heated spindles, respectively. It means that when the spindle is not heated, the process is not as stable, and the standard deviation is higher by 69%.
Funder
VEGA APVV Operational Programme Integrated Infrastructure funded by the European Regional Development Fund
Subject
Electrical and Electronic Engineering,Industrial and Manufacturing Engineering,Control and Optimization,Mechanical Engineering,Computer Science (miscellaneous),Control and Systems Engineering
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