摘要
并联机床的动态性能是影响其精度的主要因素之一,因此,必须从平面并联机构与电主轴耦合系统的角度出发,研究动力学参数变化对平面并联机床动态性能的影响。根据已建立的平面并联机构与电主轴耦合系统动力学模型,运用数值方法研究了动力学参数变化对耦合系统动态性能的影响。结果表明平面并联机构的动力学参数对耦合系统动态性能的影响占主导地位。相比较而言,电主轴的动力学参数对耦合系统的动态性能影响较小。因此,在提高平面并联机床的加工精度和动态性能时,应该着重考虑平面并联机构,适当地增大并联杆件的刚度和阻尼。
The dynamic performance of parallel machine tool is one of the main factors that affect the machining precision.Therefore,the influence of dynamic parameters on the dynamic performance of the planar parallel machine tool must be investigated from the view point of planar parallel mechanism and spindle coupling system.According to the dynamics model of planar parallel mechanism and spindle coupling system established,the influence of dynamic parameters on dynamic performance of planar parallel mechanism and spindle coupling system was studied by means of numerical method.Results show that the influence of the dynamic parameters of the planar parallel mechanism on the coupling system dynamic performance is dominant.In comparison,the influence of the dynamic parameters of motorized spindle on the coupling system dynamic performance is smaller.Therefore,in order to improve the machining precision and dynamic performance of the planar parallel machine tool,the planar parallel mechanism should be taken into account,that is,the stiffness and damping of parallel bars should be increased appropriately.
出处
《组合机床与自动化加工技术》
北大核心
2011年第3期26-29,40,共5页
Modular Machine Tool & Automatic Manufacturing Technique
基金
山东省自然科学基金(Y2005F22)
山东省重点学科(实验室)基金(XTD0714)
关键词
平面并联机构
电主轴
耦合系统
动力学参数
动态性能
planar parallel mechanism
motorized spindle
coupling system
dynamic parameters
dynamic performance
