Thermal Model and Thermal Analysis of the Dual Drive Sliding Feed System

IF 2.1 3区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Machines Pub Date : 2023-12-13 DOI:10.3390/machines11121084

Hui Li, Haiyang Liu, Xianying Feng, Yandong Liu, Ming Yao, Anning Wang

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引用次数: 0

Abstract

The dual drive sliding feed system can obtain a uniform and stable resolution at extremely low speeds and significantly reduce the system’s nonlinear friction. However, the numerous thermal sources within the system and the multipoint sliding contact during transmission result in a significant temperature rise, leading to considerable thermal deformation and errors. Moreover, the responsive mechanism of the thermal characteristics needs to be clarified. Therefore, firstly, a frictional torque model of the engagement of the screw and nut is established, and the heat generation, heat transfer, and thermal contact resistance (TCR) are solved. Then, based on the solution, a finite element thermal simulation model of the dual drive sliding feed system is established, and experiments are performed for validation. The results show that the error in temperature at the measuring point is less than 2.1 °C, and the axial thermal elongation of the screw is less than 6.2 µm. Finally, the thermal characteristics of the feeding system under various operating conditions are analyzed. The results show that the established thermal simulated model can effectively describe the dynamic thermal characteristics of the dual drive sliding feed system during operation. The effects of the rotational speed and ambient temperature on the dynamic thermal characteristics of the dual drive sliding feed system are investigated separately. The temperature increase in each part of the screw during the operation is characterized.

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双驱动滑动进给系统的热模型和热分析

双驱动滑动进给系统可以在极低的速度下获得均匀稳定的分辨率，并显著降低系统的非线性摩擦。然而，系统内部的众多热源和传输过程中的多点滑动接触会导致显著的温升，从而产生相当大的热变形和误差。此外，还需要明确热特性的响应机制。因此，首先建立了螺杆和螺母啮合的摩擦扭矩模型，并求解了发热、传热和热接触电阻（TCR）。然后，根据求解结果建立了双驱动滑动进给系统的有限元热仿真模型，并进行了实验验证。结果表明，测量点的温度误差小于 2.1 °C，螺杆的轴向热伸长率小于 6.2 µm。最后，分析了喂料系统在各种工作条件下的热特性。结果表明，所建立的热模拟模型能有效描述双驱动滑动喂料系统在运行过程中的动态热特性。分别研究了转速和环境温度对双驱动滑动进给系统动态热特性的影响。对螺杆各部分在运行过程中的温度升高进行了表征。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Machines Multiple-

CiteScore

3.00

自引率

26.90%

发文量

1012

审稿时长

11 weeks

期刊介绍： Machines (ISSN 2075-1702) is an international, peer-reviewed journal on machinery and engineering. It publishes research articles, reviews, short communications and letters. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. There is no restriction on the length of the papers. Full experimental and/or methodical details must be provided. There are, in addition, unique features of this journal: *manuscripts regarding research proposals and research ideas will be particularly welcomed *electronic files or software regarding the full details of the calculation and experimental procedure - if unable to be published in a normal way - can be deposited as supplementary material Subject Areas: applications of automation, systems and control engineering, electronic engineering, mechanical engineering, computer engineering, mechatronics, robotics, industrial design, human-machine-interfaces, mechanical systems, machines and related components, machine vision, history of technology and industrial revolution, turbo machinery, machine diagnostics and prognostics (condition monitoring), machine design.