Influences of metalworking fluid on the thermal errors of a 4-axis thermal test piece
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2022-03-22
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Conference Paper
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Abstract
Thermally induced errors of machine tools can cause up to 75% of geometric errors on machined workpieces and are therefore a crucial precision defining factor on any produced part, which in turn has further effects on the performance of the produced part during its life cycle. In the machining process, metal working fluid fulfils many tasks and ensures beneficial cutting properties. It can have a significant impact on the thermal behaviour of machine tools. A thermal test piece is produced to identify the thermal errors of a rotary axis of a 5-axis machine tool under a thermal load consisting of rotating the C-axis for four hours and subsequently idling for four hours, once with metalworking fluid active during the C-axis movement and once without the use of any metalworking fluid. This test piece is produced in accordance to ISO/CD 10791-10:2020 in such a way that it allows for separating the thermal location error contributions of the main machine axes, and to infer on the effect of the thermal errors on the finished product. The metalworking fluid has a significant effect on the thermal behaviour of the analysed machine tool. In the analysed load, the thermal errors are reduced, when metalworking fluid is active due to reduced and homogenised temperatures. However, this cooling can also lead to a sign change of the thermal error. The asymmetric MWF drainage system design in the Y-direction leads to thermal errors that could not be observed if no metalworking fluid is used as otherwise the Y-direction behaves thermosymmetrically.
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published
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Publisher
euspen
Event
euspen Special Interest Group Meeting on Thermal Issues
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Subject
Thermal error; Metalworking fluid; Test piece; Machine Tool; Metrology
Organisational unit
03641 - Wegener, Konrad (emeritus) / Wegener, Konrad (emeritus)
09706 - Bambach, Markus / Bambach, Markus
Notes
Presentation held on March 22, 2022.