TY - GEN
T1 - Thermal error characteristic analysis for a large precision EDM machine tool due to environmental temperature
AU - Zhao, Zhaoxi
AU - Wang, Zhenlong
AU - Wang, Yukui
AU - Liu, Jianyong
N1 - Publisher Copyright:
© 2019 European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019. All rights reserved.
PY - 2019
Y1 - 2019
N2 - Nowadays, the large precision electrical discharge machining (EDM) machine tools are indispensable for manufacturing large and integrated parts in the aerospace industry. However, the thermal deformation caused by environmental temperature which is neglected in small and medium-sized machine tools is obvious in large ones. In this paper, the environmental temperature on the thermal behaviour of the large precision die-sinking EDM machine tool is studied. The temperature gradient of machine tool is measured by thermal camera recording the temperature in the workshop for 4 days. Based on Fourier transform, finite element method (FEM) is used to study the temperature field and thermal error of the machine tool under different temperature fluctuation amplitudes and periods. The results of the simulated model and the theoretical analysis are matched. Meanwhile, the convective heat transfer coefficients at different temperatures are calculated. When the temperature fluctuation period is 1 day, the thermal displacement is maximum, which is about 14μm. The optimum amplitude of ambient temperature fluctuation are obtained. Generally speaking, the precision level should be ±1℃. This work provides the basis for temperature setting and control in constant temperature workshop and thermal deformation compensation of machine tools.
AB - Nowadays, the large precision electrical discharge machining (EDM) machine tools are indispensable for manufacturing large and integrated parts in the aerospace industry. However, the thermal deformation caused by environmental temperature which is neglected in small and medium-sized machine tools is obvious in large ones. In this paper, the environmental temperature on the thermal behaviour of the large precision die-sinking EDM machine tool is studied. The temperature gradient of machine tool is measured by thermal camera recording the temperature in the workshop for 4 days. Based on Fourier transform, finite element method (FEM) is used to study the temperature field and thermal error of the machine tool under different temperature fluctuation amplitudes and periods. The results of the simulated model and the theoretical analysis are matched. Meanwhile, the convective heat transfer coefficients at different temperatures are calculated. When the temperature fluctuation period is 1 day, the thermal displacement is maximum, which is about 14μm. The optimum amplitude of ambient temperature fluctuation are obtained. Generally speaking, the precision level should be ±1℃. This work provides the basis for temperature setting and control in constant temperature workshop and thermal deformation compensation of machine tools.
KW - Environmental temperature
KW - Finite element method
KW - Large precision EDM machine tools
KW - Thermal error
UR - https://www.scopus.com/pages/publications/85070997117
M3 - 会议稿件
AN - SCOPUS:85070997117
T3 - European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
SP - 162
EP - 165
BT - European Society for Precision Engineering and Nanotechnology, Conference Proceedings - 19th International Conference and Exhibition, EUSPEN 2019
A2 - Leach, Richard K.
A2 - Billington, D.
A2 - Nisbet, C.
A2 - Phillips, D.
PB - euspen
T2 - 19th International Conference of the European Society for Precision Engineering and Nanotechnology, EUSPEN 2019
Y2 - 3 June 2019 through 7 June 2019
ER -