Real-time compensation of a 5-axis CNC milling centre thermal errors considering different spindle units
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F20%3A00341715" target="_blank" >RIV/68407700:21220/20:00341715 - isvavai.cz</a>
Result on the web
<a href="https://www.euspen.eu/resource/real-time-compensation-of-a-5-axis-cnc-milling-centre-thermal-errors-considering-different-spindle-units/" target="_blank" >https://www.euspen.eu/resource/real-time-compensation-of-a-5-axis-cnc-milling-centre-thermal-errors-considering-different-spindle-units/</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Real-time compensation of a 5-axis CNC milling centre thermal errors considering different spindle units
Original language description
Thermal errors of machine tools are the main contributor to geometrical inaccuracies of machined workpieces. Successful reduction in thermal errors has been realized through thermal error compensation techniques in the past few decades. The effectiveness of thermal error models directly determines the compensation results. However, most of the current thermal error models are empirical and highly rely on the collected data under specific working conditions, neglecting the insight into the underlying mechanisms that result in thermal deformations. On the contrary, the transfer function based correction method lead to promising results as was shown in past studies. Furthermore, machine tools manufacturers frequently offer the same type of the machine tool equipped with different spindle units. Consequently, it leads to different thermal behaviour depending on the specific spindle unit mounted in the machine tool. The research presented in this paper shows a dynamic approach for thermal error compensation of 5-axis CNC milling centres considering different spindle units. Experimentally obtained thermal errors at the TCP from milling centres with 3 different mounted spindle units were mutually compared, showing a significant variation in thermal errors in the Z direction depending on the specific spindle unit. System identification theory is applied to build the dynamic thermal error model for a single spindle unit based on calibration experiment. An industrial applicability of compensation models essentially depends on duration of calibration experiments and modelling effort to identify compensation model parameters. Therefore, the developed transfer function model is modified from the calibration effort point of view via multiplying original compensation model by a constant. Subsequently, model is applied on tests with other spindle units.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
20302 - Applied mechanics
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the 20th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2020
ISBN
9780995775176
ISSN
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e-ISSN
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Number of pages
4
Pages from-to
559-562
Publisher name
european society for precision engineering & nanotechnology
Place of publication
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Event location
Geneva
Event date
Jun 8, 2020
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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