A thermal error reduction of CNC grinding machine by FEA-based cooling system design and thermal compensation

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00374812" target="_blank" >RIV/68407700:21220/24:00374812 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.euspen.eu/knowledge-base/TI24115.pdf" target="_blank" >https://www.euspen.eu/knowledge-base/TI24115.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

A thermal error reduction of CNC grinding machine by FEA-based cooling system design and thermal compensation

Popis výsledku v původním jazyce

There are many causes for workpiece inaccuracy. However, thermal errors of machine tools are usually the most significant cause that affects the accuracy of workpieces, despite the rapid development in machine tools lasting several decades. This paper presents an enhancement of a CNC grinding machine accuracy by reduction of thermal error using an external cooling system design based on FEA in combination with thermal error compensation. First, offline thermal error modelling using finite element analysis (FEA) was caried out to investigate transient thermal deformations of the CNC grinding machine. The external cooling of the wheel head is proposed based on FEA analysis to significantly reduce angular displacements of the wheel head. Second, a thermal error compensation based on transfer function (TF) was developed. The compensation model is built on the experimental measurements on the CNC grinding machine with and without application of the external wheel head cooling. An added benefit of the external wheel head cooling proposed by FEA is that it leads to simplified structure of the thermal error compensation model, and it also reduces the compensation model inputs. The CNC grinding machine accuracy improvements were around 80% in average in the X direction when compared with the uncompensated state.

Název v anglickém jazyce

A thermal error reduction of CNC grinding machine by FEA-based cooling system design and thermal compensation

Popis výsledku anglicky

There are many causes for workpiece inaccuracy. However, thermal errors of machine tools are usually the most significant cause that affects the accuracy of workpieces, despite the rapid development in machine tools lasting several decades. This paper presents an enhancement of a CNC grinding machine accuracy by reduction of thermal error using an external cooling system design based on FEA in combination with thermal error compensation. First, offline thermal error modelling using finite element analysis (FEA) was caried out to investigate transient thermal deformations of the CNC grinding machine. The external cooling of the wheel head is proposed based on FEA analysis to significantly reduce angular displacements of the wheel head. Second, a thermal error compensation based on transfer function (TF) was developed. The compensation model is built on the experimental measurements on the CNC grinding machine with and without application of the external wheel head cooling. An added benefit of the external wheel head cooling proposed by FEA is that it leads to simplified structure of the thermal error compensation model, and it also reduces the compensation model inputs. The CNC grinding machine accuracy improvements were around 80% in average in the X direction when compared with the uncompensated state.

Druh

O - Ostatní výsledky

CEP obor

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OECD FORD obor

20302 - Applied mechanics

Projekt

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Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů