Results 201 to 210 of about 1,078,541 (245)
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The International Journal of Advanced Manufacturing Technology, 2002
Thermally induced errors have been significant factors affecting machine tool accuracy. In this paper, the thermal spindle error and thermal feed axis error have been considered, and a measurement/compensation system for thermal error is introduced. Several modelling techniques for thermal errors are also implemented for the thermal error prediction; i.
H. Pahk, S.W. Lee
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Thermally induced errors have been significant factors affecting machine tool accuracy. In this paper, the thermal spindle error and thermal feed axis error have been considered, and a measurement/compensation system for thermal error is introduced. Several modelling techniques for thermal errors are also implemented for the thermal error prediction; i.
H. Pahk, S.W. Lee
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Error of measurement of thermal energy
Measurement Techniques, 1998Analytical expressions are obtained for the error of measurement of thermal energy. It is shown that pairs of temperature transducers and flowmeters must be used to satisfy the “Regulations on the Metering of Thermal Energy and Flows of Heart Carriers”.
A. A. Vakulin, A. V. Shavlov
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Error of measurement of thermal power
Measurement Techniques, 1995Formulas for calculating the errors of heat output measurement are refined on the basis of the relation between the partial errors of measurement of the mass flow of a heat-transfer agent and its thermal flux. Examples are given for steam and hot water.
I. M. Shenbrot, B. M. Belyaev
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Machine Tool Thermal Error Reduction—an Appraisal
Proceedings of the I MECH E Part B Journal of Engineering Manufacture, 1999It has been shown that machine tool thermal distortion can account for 75 per cent of the total machining error. As a result there has been a great deal of interest in techniques for reducing thermal errors. The approaches taken to thermal error reduction can be divided into two broad categories of reducing structural temperature change and reducing ...
S R Postlethwaite, J P Allen, D G Ford
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Error analysis of thermal equation with moving ends
Mathematics and Computers in Simulation, 2010zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Mauro Antonio Rincon, M. O. Lacerda
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Thermal-Awareness in a Soft Error Tolerant Architecture
2019 Design, Automation & Test in Europe Conference & Exhibition (DATE), 2019It is crucial to provide soft error reliability in a power-efficient manner such that the maximum chip temperature remains within the safe operating limits. Different execution phases of an application have diverse performance, power, temperature and vulnerability behavior that can be leveraged to fulfill the resiliency requirements within the allowed ...
Sajjad Hussain +2 more
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A Combined Error Model for Thermal Error Compensation of Machine Tools
Advanced Materials Research, 2013In 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
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Thermal error analysis and error prediction modeling on a machine tool
2008 IEEE International Conference on Industrial Engineering and Engineering Management, 2008Thermal 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 +4 more
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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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Thermal Error Modelling in CNC Machines
Applied Mechanics and Materials, 2014Latest 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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