直线驱动新技术及其在无绳电梯装备上的应用

直线电动机直接驱动系统是近15年发展起来的一种新型进给传动方式,在各类高速、精密加工设备上具有广泛的应用前景.文章介绍了直线电动机的工作原理;阐述了直线电动机伺服驱动系统采用传统控制技术、现代控制技术与智能控制技术的研究现状与发展趋势;预测了直线电动机在无绳电梯装备上的应用前景.     

直线驱动控制技术及其在无绳电梯装备上的应用研究

直线电动机直接驱动系统是近15年发展起来的一种新型进给传动方式,在各类高速、精密加工设备上已获得广泛的应用.本文介绍了直线电动杌的工作原理,阐述了直线电动机伺服驱动系统采用传统控制技术、现代控制技术与智能控制技术的研究现状与发展趋势.预测了直线电动机在无绳电梯装备上的应用前景.     

数控机床用直线电动机及其控制技术

直线电动机直接驱动系统具有结构简单、动态响应快、速度和加速度大等一系列优点,是各类数控机床进给运动的理想传动方式。介绍了直线电动机直接驱动技术原理、特点及其在数控机床中的应用,阐述了直线电动机直接驱动系统控制技术的研究现状及发展趋势。     

直线电动机及其在非圆截面零件加工中的应用

近年来,随着具有高频响应特性的直线电动机的发展,对非圆横截面零件进行数控加工成为可能.直线电动机直接驱动系统具有结构简单、动态响应快、速度和加速度大、精度高、振动和噪声小等一系列优点,作为微进给机构,能够满足非圆截面零件加工的需要,在非圆截面零件的数控加工及数控成形中得到了广泛的应用.介绍了直线电动机的工作原理和直线电动机进给驱动的主要特点,总结了直线电动机在凸轮、椭圆形等非圆截面实心零件数控加工,及多边形非圆截面空心零件旋压成形中的应用状况,最后对直线电动机的发展趋势进行了展望.     

直线电动机在数控机床中的应用

简要阐述了直线电动机驱动相对于传统数控机床进给驱动的优点,分析了直线电动机在数控机床应用中存在的一些特殊问题,介绍了直线电动机在高速加工、异形截面加工等方面的应用,列举了在高速进给驱动系统中的典型应用事例,并对直线电动机在数控机床中的应用前景进行了展望。     

直线电动机的应用

上期"直线电动机原理"介绍了3种常用于工业界精密定位的直线电动机(LM):步进直线电动机(LMP)、有铁心伺服直线电动机(LMS)、无铁心伺服直线电动机(LMC).本文将说明这些LM的选用要点及典型应用.     

直线电动机高速进给单元的关键技术

为满足超高速加工的要求,近年来出现了一种新型的直线电动机伺服驱动进给方式。文章结合我校自行研制的GD－3型高速直线电动机进给单元,介绍了在设计直线电动机高速进给单元时直线电动机参数的计算和进给单元结构布局的选择,并确定了直线电动机的防磁和散热问题、工作台和导轨等部件的设计以及直线电动机控制系统等有关问题。研究表明,直线电动机在高速数控机床上具有良好的应用前景。     

机床进给系统用直线电动机综述

直线电动机是一种新型驱动装置,有着广泛的应用。文章简单介绍了直线电动机的基本原理和分类,分析了其优缺点,综述了国内外的发展情况,最后提出直线电动机的研究方向。     

直线电动机应用于数控机床的共性技术研究

为了提高直线电动机在数控机床上的应用水平,对直线电动机应用于数控机床的共性技术问题作了讨论。以减小电动机推力波动为目标,提出了有限元法与差异进化算法相结合的电机结构优化方法,阐述了直线电动机的选型计算步骤,研究了直线伺服系统的智能控制策略,对直线电动机工作台的定位误差补偿技术作了比较。最后列出了其他一些值得关注的问题。     

直线电动机应用于数控机床的共性技术研究

为了提高直线电动机在数控机床上的应用水平,对直线电动机应用于数控机床的共性技术问题作了讨论。以减小电动机推力波动为目标,提出了有限元法与差异进化算法相结合的电机结构优化方法,阐述了直线电动机的选型计算步骤,研究了直线伺服系统的智能控制策略,对直线电动机工作台的定位误差补偿技术作了比较。最后列出了其他一些值得关注的问题。     

直线电机及其在超高速机床上的应用

介绍机床上应用直线电机的进展情况，研究直线电机高速数控进给单元的组成和设计中应解决的主要问题，指出直线电机的优越性，存在问题及其应用前景。     

Modélisation du comportement dynamique et commande d'une machine-outil agile

In high-speed machine tools, the three parts: structure, mechanism and control are very linked. So, it is necessary to have these parts modellised to control the influence of the different driving motors on the trajectory error (spindle or work piece according to the case), in terms of precision and time response. After an introduction about the advent of agile machine tools to meet the car industry needs, this paper gives a progress report about the modelling of a machine tool driven by linear motors. The global performances of a production machine are defined starting from all the components of the mechanical structure on the one hand, and, on the other hand, from the control strategy which is adopted to rigidify the connection between the reference and the real position to be controlled. Another significant point approached is about the contribution of new control strategies to face the mechanical flexibilities and the couplings between the axis.     

直线电机力学系统的计算与分析

通过建立直线电机的受力模型,推出直线电机的推力和功率计算公式,得出最大速度和加速度公式,解决了保证在一定的功率储备的前提下,使直线电机的推动力、进给速度和加速度满足高速机床的要求等问题,在直线电机的设计和制造中具有借鉴意义。     

基于PLC的直线插补控制及其实现

利用可编程控制器(PLC)直接联动控制步进电机,实现了直线轮廓的数字控制,使点位/直线控制的CNC机床控制系统成本显著下降.文章论述了用PLC实现数控直线插补的原理与方法,并介绍了驱动接口以及PLC控制软件的逻辑.     

机床伺服电机的选型方法分析

重点介绍机床行业中伺服电机的选型分析方法,从机床负载的运动状态和惯量匹配的角度出发,分析伺服电机的各项工作参数确定的计算方法,通过在多种机床产品上的应用验证,达到了机床所要求的位置精度(定位、重复定位精度)和伺服响应特性(低速、高速、空载、负载)的目的,从而实现机床伺服驱动系统的优化配置。     

非匀速进给数控机床伺服系统的电机选择

介绍了非匀速进给数控机床伺服系统的电机选择的方法。与普通机床相比，非匀速进给数控机床多了一个驱动移动部件进行加减速运动的力，在计算中要将其计算在内。     

Design and static performance of high speed machining centre with “direct drive”

“Direct drive” is an ideal method for speeding machine tools. In the structure of a CNC machining centre with “direct drive”, the linear motor’s primary and secondary parts are assembled into the worktable and machine bed respectively to directly drive the worktable. The built-in rotary motor is assembled in the spindle to realize the main transmission system of the machine tool “direct drive”. All mechanical transmission elements in machine tools are eliminated. High speed, efficiency, and accuracy are easily obtained. However, in this type of “direct drive” machining centre, the magnetic attraction force between the primary and the secondary linear motors and the dynamic impact at acceleration and deceleration are directly imposed on the machine tool, and influence the performance of the machining centre. This paper analyzes the special demands of “direct drive” on the machine centre, and introduces a new structure of the machining tool. The worktable and machine bed are optimized to meet the special demands of “direct drive”. Static performance simulation on the machining centre is done to reveal an ideal result.     

A novel dynamic model for multiple configurations of machine tools using a coordinate transformation method

Virtual machine tools have been used widely for simulating designs in computer environments to determine optimal design parameters without the need for manufacturing prototypes. Machine tools include different multiple configurations that are designed to be suitable for the differing requirements of production. To date, studies on dynamic analysis have been limited to a few-axis machine tools of a specific configuration, such as a 3-axis milling machine or a 4-axis grinding machine. Here, we propose a novel method to focus on the dynamic analyses of multi-axis machines with differing multiple configurations. The motion equations for multiple degrees of freedom of linear and rotary axes are established by a Lagrange energy method, equilibrium equations, and Newton’s second law. This technique formulates the motion equations for each axis, and then further develops them for a multi-axis machine through a combination process and a transformation matrix. The library includes five dynamic model components, built to simulate 1236 different configurations of a machine tool. A dynamic analysis was applied to a control system to simulate the control signals of a virtual machine, which include stepped, ramped, curved, sinusoidal, and circular responses, and frequency response functions. The simulated and experimental results demonstrated that the method has high accuracy and reliability for one-, two-, and four-axis machine tools. Thus, this method can simulate the dynamic analyses of multi-axis machines and different multi-configurations without the need to build a specific configuration for each machine. It is recommended for selecting optimal motors, design parameters, and control parameters of the multiple configurations in a machine tool.