An efficient thermal error prediction model using neural networks and key temperature points for gantry machining centers

IF 1.5 4区 工程技术 Q3 MECHANICS Journal of Mechanics Pub Date : 2023-12-13 DOI:10.1093/jom/ufad042
Hao-Sung Chiu, Chin-Han Chang, Yu-Chen Huang, Yung-Chieh Lai, Cheng-Jyun Yang, Yu-Bin Chen
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Abstract

The gantry machining center is popular for various fabrication, such as milling and tapping. However, thermal errors introduced by the rotation of spindle, workpiece processing, and cooling significantly degrade fabrication precision. The objective of this study is to establish an appropriate and efficient thermal error prediction model for the spindle of gantry machining center. The model will then aid real-time compensation for the error. Firstly, this study presents a systematic strategy for selecting key temperature points on the gantry machining center, reducing the number of required sensors. Subsequently, a thermal error model is developed based on the selected key temperature points. The model will be capable of predicting thermal errors in the x- and z-direction. Finally, this work both validates the thermal error model and exhibits real-time compensation capabilities using a real machine.
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利用神经网络和龙门加工中心关键温度点的高效热误差预测模型
龙门加工中心常用于各种加工,如铣削和攻丝。然而,主轴旋转、工件加工和冷却带来的热误差会大大降低加工精度。本研究的目的是为龙门加工中心的主轴建立一个适当而有效的热误差预测模型。该模型将有助于对误差进行实时补偿。首先,本研究提出了在龙门加工中心上选择关键温度点的系统策略,从而减少了所需传感器的数量。随后,根据选定的关键温度点开发了热误差模型。该模型能够预测 X 和 Z 方向的热误差。最后,这项工作不仅验证了热误差模型,还利用实际机床展示了实时补偿功能。
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来源期刊
Journal of Mechanics
Journal of Mechanics 物理-力学
CiteScore
3.20
自引率
11.80%
发文量
20
审稿时长
6 months
期刊介绍: The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.
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