高速精密轧辊磨头的热力学特性及动态性能研究

项目名称： 高速精密轧辊磨头的热力学特性及动态性能研究

项目编号： No.51465008

项目类型： 地区科学基金项目

立项/批准年度： 2015

项目学科： 机械、仪表工业

项目作者： 吴怀超

作者单位： 贵州大学

项目金额： 45万元

中文摘要： 针对我国目前对高速精密轧辊磨床依赖进口的实际情况，本项目开展80m/s高速精密轧辊磨头的热力学特性及动态性能的研究对实现高速精密轧辊磨床的国产化具有重要的理论价值和现实意义。本项目首先对80m/s高速精密轧辊磨头的油膜润滑机理开展研究，拟提取各油膜润滑摩擦副的热力学和动力学性能参数，在此基础上，分别开展磨头热力学特性及动态性能的研究。针对热力学特性，拟计算与分析各热源引起磨头的热应力场和热变形以及各热源共同作用下磨头的耦合热应力场和热变形，并识别出磨头热变形的薄弱环节；针对动态性能，拟从模态分析和谐响应分析的角度揭示磨头低阶固有频率和振型以及在动态激励下的抗振性能，并识别出磨头动态性能的薄弱环节。最后，为了设计出一种热态和动态性能均优良的磨头，对磨头在热态和动态性能两方面进行优化设计。本项目将形成原创性的理论成果，能为国产80m/s高速精密轧辊磨床的开发提供理论资料和技术支持。

中文关键词： 高速磨削；轧辊磨床；精密磨头；热力学特性；动态性能

英文摘要： Facing at the actual situation of depending on import for high speed and precision roll grinder in our country at present, it has important theoretical value and practical significance for realizing the nationalization of high speed and precision roll grinder that studying thermodynamic characteristics and dynamic performances of 80m/s high speed and precision roll grinding head in this project. Oil film lubrication mechanism of 80m/s high speed and precision roll grinding head will be firstly studied in this project, and thermodynamic and dynamic parameters of each friction pair of oil film lubrication will be extracted. On the basis, thermodynamic characteristics and dynamic performances of the grinding head will be studied respectively. For thermodynamic characteristics, the thermal stress field and thermal deformation of the grinding head caused by each heat source and the coupling thermal stress field and thermal deformation of the grinding head caused by all heat sources will be calculated and analyzed, and the weak link of thermal deformation of the grinding head will be identified. For dynamic performances, the low-order natural frequency, vibration mode and anti-vibration performance under dynamic excitation of the grinding head will be revealed from the angles of modal analysis and harmonic response analysis, and the weak link of dynamic performance of the grinding head will be identified. Finally, in order to design a kind of grinding head whose thermal and dynamic performances are both good, the optimization design for the grinding head will be performed from two aspects of thermal characteristic and dynamic performance. Some original theoretical achievements will be obtained in this project, and theoretical materials and technology supports can be provided for developing domestic 80m/s high speed and precision roll grinder.

英文关键词： high speed grinding;roll grinder;precision grinding head;thermodynamic characteristic;dynamic performance