Results 251 to 260 of about 1,075,531 (290)

Thermal Error Modelling in CNC Machines

Applied Mechanics and Materials, 2014
Latest trend in increasing the performance characteristics of precision machines is reducing error in machines. Today research is focused on Machine tool accuracy. The effect of thermal error contributes to major part of 70% of volumetric error. The present study aims to establish a new compensation method for CNC Turning centre.
R. Jamuna, U. Natarajan
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Recent Patents of Thermal Error Modeling and Thermal Error Prediction of CNC Machine Tool Spindle

Recent Patents on Engineering
: With the development of machine tools to high precision and high automation, thermal error has become the key reason to hinder the improvement of thermal stability of machine tools. The spindle electrothermal error is an important factor affecting the machining accuracy of highspeed CNC machine tools.
Zhaolong Li, Benchao Sun
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Robust Machine Tool Thermal Error Modeling Through Thermal Mode Concept

Journal of Manufacturing Science and Engineering, 2008
Thermal errors are among the most significant contributors to machine tool errors. 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.
Jie Zhu, Jun Ni, Albert J. Shih
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Machine-Tool Error Observer Design With Application to Thermal Error Tracking

Journal of Manufacturing Science and Engineering, 2018
AbstractA parameter identification procedure for identifying the parameters of a volumetric error model of a large machine tool requires hundreds of random volumetric error components in its workspace and thus takes hours of measurement time. It causes thermal errors of a large machine difficult to be tracked and compensated periodically.
Hua-Wei Ko, Shiv G. Kapoor, Placid M. Ferreira, Patrick Bazzoli, J. Adam Nisbett, Douglas Bristow, Yujie Chen   +6 more
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A Combined Error Model for Thermal Error Compensation of Machine Tools

Advanced Materials Research, 2013
In this paper, a combined error model for thermal error compensation of machine tools is presented. Through the analysis of thermal error data of machine spindle at different temperatures, the error variation law is obtained. Experiments on the axial directional spindle deformation on a CNC machine center are conducted to build and validate the ...
Wei Wang, Jian Guo Yang
openaire   +1 more source

Thermal error analysis and error prediction modeling on a machine tool

2008 IEEE International Conference on Industrial Engineering and Engineering Management, 2008
Thermal errors are the largest contributor to the dimensional errors of a workpiece in precision machining. It is very significant to study how to accurately simulate the spindle thermal errors. In this paper a novel concept of thermal error modes analysis is proposed to develop a better understanding of the thermal deformation on a machine tool.
null Zhu Rui, null Dai Shijie, null Zhu Yonglu, null Wu Xinye, null Guo Yinbiao   +4 more
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Error analysis of thermal response tests

Applied Energy, 2013
Abstract The ground thermal conductivity and borehole thermal resistance are essential parameters for the design of a ground source heat pump system. As it is hardly possible to obtain sufficiently accurate values of these parameters from geological or soil-profile information, thermal response tests have been developed that provide measurements in ...
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Error Analysis in Thermal Purity Determinations

1980
We studied by simulation and experimentaly the deviations occuring at purity determinations. We propose a method for the proper choice of range for evaluation.The continuous and stepwise measuring techniques were compared.
Gy. Kiss, K. Seybold, T. Meisel
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Thermal Error Modeling of Precision Positioning Stage

Advanced Materials Research, 2013
As the thermal deformation significantly impacts the accuracy of precision positioning stage, it is necessary to realize the thermal error. The thermal deformation of the positioning stage is simulated by the finite element analysis. The relationship between the temperature variation and thermal error is fitted third-order polynomial function whose ...
Jing Shu Wang, Ming Chi Feng
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Thermally induced errors in fluid tube tiltmeters

Journal of Geophysical Research, 1977
The effects of temperature variations on the tilt measured by long fluid tube tiltmeters are examined in detail. Temperature effects are important both in instruments which measure tilt as changes in fluid level between the ends of a fluid-filled tube and in instruments which measure tilt as changes in fluid pressure.
John Beavan, Roger Bilham
openaire   +1 more source