【作者】 杨勇；

【导师】 叶文华；

【作者基本信息】 南京航空航天大学 ， 机械电子工程， 2010， 硕士

【摘要】 高速高精数控加工技术在数控加工行业占有非常重要的位置,而高速进给驱动技术是实现高速高精数控机床关键技术之一。重心驱动是一种新型的数控机床进给驱动方式,能够有效提高机床的运动速度和精度,但对其研究仍处于起步阶段。本文以采用同步双驱和重心驱动技术的MCH63精密卧加箱中箱结构为研究对象,对重心驱动机构进行了理论分析和实验仿真分析。分析了影响重心驱动机构动力学性能的影响因素。具体内容包括:1.建立MCH63加工中心重心驱动机构的动力学模型,理论分析得到了影响重心驱动机构动力学性能的影响因素包括导轨滑块拓扑结构、驱动力与结构重心的间距以及导轨滑块间动力学参数刚度、阻尼值。2.通过模态实验识别出MCH63精密卧加导轨滑块结合面的刚度、阻尼值。3.在ANSYS Workbench环境中,对MCH63加工中心重心驱动机构参数化建模,在频域内仿真导轨滑块拓扑结构对重心驱动机构动力学性能的影响,得出重心驱动机构中导轨滑块拓扑结构的设计原则为:导轨间距尽量取较大值。4.利用虚拟样机技术,以三维CAD软件SolidWorks、动力学分析软件RecurDyn、有限元分析软件ANSYS建立虚拟仿真环境,建立MCH63精密卧加箱中箱结构单、双驱刚柔耦合多体动力学模型,设置动力学参数,仿真机床真实加工工况,在时域内仿真分析驱动力与重心驱动机构重心的间距以及导轨滑块结合面参数——刚度、阻尼值这两组参数对重心驱动机构动力学性能的影响。更多还原

【Abstract】 The high speed and high precision technology of NC machining plays a very important role in the field of machining, and the feed drive of high speed is one of the key technologies in it. Driven at Center of Gravity (DCG) is an innovative feed drive method for machine tool, and it can increase the motion velocity and accuracy of machine tool effectively but the research on it is still in an infancy stage. In this paper, the box in box structure of MCH63 precise horizontal machining center is studied, which is based on double-driving synchronously and driven at center of gravity technology (DCG). The DCG structure is theoretical and experimental analyzed. The influence parameters to dynamic performance of DCG structure are analyzed. The contents include as follows:(1)The DCG structure dynamic model is established and the influence parameters to dynamic performance of DCG structure are analyzed. The parameters include rolling guide-slider topological structure, the distance between driving force and structure gravity center, and the dynamic parameters of rolling guide-slider combined interface: stiffness and damping.(2)The dynamic parameters of rolling guide-slider combined interface, stiffness and damping, is identified in a modal experiment.(3)The DCG structure dynamic parameter model is established in ANSYS Workbench Environment and the influence of rolling guide-slider topological structure to the DCG structure dynamic performance is simulated and analyzed in frequency domain. The analysis result indicated the design principle of rolling guide-slider topological structure is bigger distance between guides should be adopted.(4)By means of virtual prototype technology, the CAD software SolidWorks, dynamic analysis software RecurDyn and FEM software ANSYS are utilized to establish a virtual simulate environment. In this simulate environment MCH63 precise horizontal machining center single driving and double driving rigid and flexible coupled multi-body system dynamic models are established. And according to real machining conditions of machine tool, the influence to DCG structure dynamic performance by the distance between driving force and structure gravity center and the dynamic parameters of rolling guide-slider combined interface, stiffness and damping, are simulated and analyzed in time domain.更多还原