多传感器融合的高效数控凸轮轴磨床磨削振动研究

The efficient CNC camshaft grinding machine is an important equipment of modern advanced manufacturing technology. More importantly, it is one of a key field and priority theme of state support. The grinding machine is easy to produce more vibrations in the process of camshaft grinding, and even to have a strong impact on grinding precision and processing efficiency. The scientific problem of grinding vibration mechanicsm is centred on and spread on the project.The detection of sensor information and sensorless information is researched to extract valid vibration characteristic quantity. The multi-sensor information fusion is discussed to get total characteristic quantity of vibration information, and then a vibration distribution diagram is drawn to locate the main vibration sources in accordance with amplitude. The grinding vibration mechanism is studied to build a mathematical model of grinding parameters and vibrations. A scientific system is formed to guide people to adopt efficient vibration attenuation technology and online vibration control technology of the high-grade CNC camshaft grinding machine. Finally, the high-speed functional units of spindle component with hybrid bearings, built-in motorized spindle with high-power, and motorized spindle with high rigidity are developed and used to the efficient CNC camshaft grinding machine.The research results go far beyond the efficient CNC camshaft grinding machine and help to guide other type CNC machines.

高效数控凸轮轴磨床是现代先进制造技术的重要装备，是国家扶持的重点领域和优先主题之一，其在磨削加工凸轮轴时易产生较大的振动，严重影响磨削精度和加工效率。本项目围绕数控磨床磨削加工振动机理这一科学的核心问题展开，研究传感器信息与无传感器信息的检测，以提取有效的振动信息特征量；研究多传感器振动信息特征量的融合，获取振动信息联合特征量，进而按振幅大小绘制振动分布图并探索出主要振动源；研究振动机理，构建磨削参数与磨削振动状态之间的数学模型，并形成一套科学的体系指导人们对高档数控凸轮轴磨床采取高效的减振技术和振动在线控制技术；最后，研制动静压轴承高速主轴单元、大功率高速内置式电主轴、高速高刚性电主轴等功能部件并将研究成果运用于高效数控凸轮轴磨床中。本项目的研究成果不仅仅局限于高效数控凸轮轴磨床，对其它类型的数控机床也有重要借鉴作用。

高效数控凸轮轴磨床是现代先进制造技术的重要装备，其在磨削加工凸轮轴时易产生较大的振动，严重影响磨削精度和加工效率。本项目围绕对高效数控凸轮轴磨床采取有效的减振与控振措施，进而提高凸轮轴磨削效率这一目标，采用有限元方法研究了高效数控凸轮轴磨床功能系统小砂轮架的振动模态特性；研究了磨削加工传感器信息与无传感器信息的检测，提取了有效的振动信息特征量；研究了高效数控凸轮轴磨床整机颤振稳定性，绘制了振动稳定性极限图，分析了主要振动源；研究了磨削参数的最优组合，分析了磨削参数影响振动的关系；研制了超高速动静压轴承内置式电主轴和液压自定心中心架两个关键部件，并进行实际应用和批量生产；运用研究成果完成了高效数控凸轮轴磨床样机的研制。