Extended bisection method for parameter identification of the transient heat conduction equation for thermo-elastic deformations during drilling
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- 作者：Janine Glänzel ; Arnd Meyer ; Roman Unger…
- 关键词：Adaptive FE simulation ; Thermo ; elasticity ; Parameter approximation ; Temperature simulation in nc ; drilled workpieces
- 刊名：The International Journal of Advanced Manufacturing Technology
- 出版年：2017
- 出版时间：February 2017
- 年：2017
- 卷：88
- 期：5-8
- 页码：1279-1288
- 全文大小：
- 刊物类别：Engineering
- 刊物主题：Industrial and Production Engineering; Media Management; Mechanical Engineering; Computer-Aided Engineering (CAD, CAE) and Design;
- 出版者：Springer London
- ISSN：1433-3015
- 卷排序：88
文摘
A new interdisciplinary approach is discribed to identifying unknown parameters using an extended version of the known interval bisection method. This developed method is based on the use of finite elements for calibrating the simulation calculation. The resulting thermo-elastic deformations which occur in drilling processes with impaired cooling lubrication are to be used as correction values for tool positioning in the NC control. Based on the strong impact on workpiece temperature of machining, a simulation approach is presented for calculating the temperature fields and their thermo-elastic consequences. In addition, methods are presented to correct these effects. This paper particularly deals with the temperature fields of drilling operations. Special attention is paid to the technique employed for iterative numerical determination of the unknown heat flux ηw and heat transfer coefficient \(\bar {\gamma }\) values. Finally, the data obtained from experiments are compared with those achieved by numerical simulation in order to verify the efficiency of simulation and determination of parameters.