流体冷却滚珠丝杠进给系统的热误差补偿

IF 1.9 3区 工程技术 Q3 ENGINEERING, MANUFACTURING
Yan Li, Jiabo Fan, Yuan Zheng, Feng Gao, Wenqiang Li, Chenfei Hei
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引用次数: 0

摘要

电机产生的热量和运动副之间的摩擦行为导致的热变形会大大降低进给系统的定位精度,从而影响零件的加工质量。内部冷却滚珠丝杠利用冷却液主动加强对流传热,抑制温升。由于冷却机的间歇性启动和停止运行模式,各种热源产生的热通量无法被冷却液完全带走,因此仍存在热误差。本研究采用 K-means++ 聚类和相关性分析来选择热关键点。根据几何误差和热误差的线性叠加原理,建立了热误差差分方程模型,以描述热关键点温度与滚珠丝杠轴伸长率之间的瞬态变化关系,并将其从热特性实验数据中分离出来,构成定位误差。利用最小二乘法确定了模型参数,并实施了基于原点偏移法的热误差补偿策略。实验比较了三种模型在不同工况下的热误差补偿效果,证实热误差差分方程模型可用于有效降低进给系统的热误差,并保持良好的鲁棒性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Thermal error compensation for a fluid-cooling ball-screw feed system
Thermal deformation resulted from the heat generated by the motor and the frictional behavior between the moving pairs significantly reduces the positioning accuracy of feed systems and thus influences the machining quality of parts. The internal cooling ball screw takes advantage of the cooling liquid to strengthen the convection heat transfer actively and suppress the temperature rise. Owing to the intermittent starting and stopping operation modes of the cooling machine, the heat flux arising from various heat sources cannot be completely removed by the coolant; consequently, thermal errors still exist. In this study, K-means++ clustering and correlation analyses were used to select thermal key points. A difference equation model of the thermal error was established to describe the transient change relationship between the temperatures of the thermal key points and the ball-screw shaft elongation, which was separated from the thermal characteristic experimental data according to the linear superposition principle of geometric and thermal errors to constitute the positioning error. The model parameters were identified using the least-squares method, and a thermal error compensation strategy based on the origin offset method was implemented. Experiments comparing the thermal error compensation of the three models under different working conditions were conducted to confirm that the thermal error difference equation model can be applied to reduce the thermal error of the feed system effectively and maintain excellent robustness.
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来源期刊
CiteScore
5.10
自引率
30.80%
发文量
167
审稿时长
5.1 months
期刊介绍: Manufacturing industries throughout the world are changing very rapidly. New concepts and methods are being developed and exploited to enable efficient and effective manufacturing. Existing manufacturing processes are being improved to meet the requirements of lean and agile manufacturing. The aim of the Journal of Engineering Manufacture is to provide a focus for these developments in engineering manufacture by publishing original papers and review papers covering technological and scientific research, developments and management implementation in manufacturing. This journal is also peer reviewed. Contributions are welcomed in the broad areas of manufacturing processes, manufacturing technology and factory automation, digital manufacturing, design and manufacturing systems including management relevant to engineering manufacture. Of particular interest at the present time would be papers concerned with digital manufacturing, metrology enabled manufacturing, smart factory, additive manufacturing and composites as well as specialist manufacturing fields like nanotechnology, sustainable & clean manufacturing and bio-manufacturing. Articles may be Research Papers, Reviews, Technical Notes, or Short Communications.
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