【作者】 李亚芹；

【导师】 龙泽明；

【作者基本信息】 佳木斯大学 ， 机械制造及其自动化， 2007， 硕士

【摘要】 本文在对国内外数控机床现状及发展趋势研究与分析的基础上,针对高速高精度数控机床的功能要求,分析了高速条件下滚珠丝杠进给系统的高精度定位的驱动特性,同时对数控机床中进给系统及整机的动态特性进行了研究。从理论上分析了影响高速加工定位精度的因素,并建立了高速加工滚珠丝杠驱动的力学模型。建立了高速滚珠丝杠进给驱动系统机械模型和伺服控制模型,并对由电机、滚珠丝杠、连轴器、支承轴承、直线导轨和机械结构组成的滚珠丝杠进给驱动系统进行了仿真分析。基于理论研究和仿真分析,设计并建立了高速加工性能分析试验台,对高速情况下滚珠丝杠进给系统的机械性能进行了试验分析。本文对影响高速高精度加工的因素进行了理论分析和试验研究,提出了在机械方面和控制方面提高高速加工定位精度的有效方法。该研究对提高高速高精度加工技术水平和产品的生产效率以及增强产品市场竞争力具有一定的研究和应用价值。为更好的解决高速、高精度定位等技术问题奠定了基础。更多还原

【Abstract】 In this paper, based on the research and analysis of the present situation and development trend of high speed and high precision CNC(Computerized Numerical Control) at home and abroad, the driving characteristics of the high precision orientation in feed system of ball screw in high speed has been analysed according to the functional requirement of high speed and high precision CNC, and key technology of dynamic characteristics of feed drive system and the integral NC(Numerical Control)lathe has been studied.Influencing factors of location precision in high speed machining have been analysed in theory, and dynamic model of ball screw driving has been established. Mechanical system and servocontrol system are modeled. A mechanical model of a ball screw in feed drive system including the motor, ball screw, coupling, supporting bearing, linear guide and machine structure has been simulated and analysed.Ball screw drive test-bed in high speed machining is designed and established based on the above theory and simulation, then the experiment has been analysed.In this paper, a valid method of enhancing the orientation precision in high speed has been put forward in terms of mechanical and control by analyzing and testing the fators of affecting high speed and high precision machining. The research has some academic and applied value for enhancing the technology level of high speed and high precision machining, raising productivity and competition, which offers a basic for solving technology problem in high speed and high precision orientation.更多还原