共查询到20条相似文献,搜索用时 110 毫秒
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柯红金 《机械制造与自动化》2012,41(3):192-193,197
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。 相似文献
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从传统MK1330外圆磨床和MK1620端面外圆磨床的进给系统结构型式出发,根据大端面阶梯轴的特殊磨削要求,论证了斜头直进式高速砂轮进给系统的优势与可行性。介绍了结合伺服控制系统、直线滚动导轨、在线量仪和高精度静压主轴系统等成熟技术而设计的斜头直进式数控砂轮进给系统在磨削实例中的应用,成功经验将有助于提高对工件的加工效率。 相似文献
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直线电动机及其在非圆截面零件加工中的应用 总被引:3,自引:0,他引:3
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. 相似文献
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J. Otsuka 《Precision Engineering》1989,11(2)
Thread grinding to obtain a leadscrew with high lead accuracy is studied. A closed-loop compensation system using a laser to measure the table feed error of the thread grinder is applied to an existing grinding system, resulting in a simplified techinique for obtaining leadscrews with high lead accuracy. 相似文献
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介绍了钢坯修磨机磨头液压压下系统的工作原理,提出压下过程中采用位置、压力复合控制,提高了工作效率.针对砂轮位置扰动引起的多余惯性力,及其磨头自身重力、摩擦力和惯性力对修磨力的影响,采用三通比例减压阀开环控制压力,系统压力波动较大的问题,提出在三通比例减压阀控制压力的基础上叠加闭环控制的方法进行改进,实现了对磨头压下力的精确控制,使系统在位置扰动下能够保持良好的跟随特性,满足了性能要求,利用AMESim软件对系统进行了建模和仿真研究,确定了控制器参数,用试验验证了仿真结果,并已成功应用于国产板坯修磨机上. 相似文献
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C. H. Liu A. Chen Y.-T. Wang C.-C. A. Chen 《The International Journal of Advanced Manufacturing Technology》2004,23(11-12):874-881
A grinding process model for an automatic grinding system with grinding force control is developed in this paper. This grinding system utilises an electric hand grinder, driven by a CNC machine centre and a force sensor for force measurement. This model includes compliance of the grinding system and is initially represented by a series of springs. The stiffness of each component is estimated in this study and it is found that the model may be simplified into a single spring-mass system. A corresponding PID controller is designed for the purpose of grinding force control, which calculates the appropriate CNC spindle displacement according to the force measured by the force sensor. Computer simulation results show that the system settling time is less than 0.25 s. 相似文献
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利用PMAC(Programmable Multi-Axis Controller)-PC作为核心控制器,设计集成了一台新型高速精密磨床.该磨床选用陶瓷球轴承电主轴作为高速主轴系统,利用直线电机作为高速精密进给系统.通过直线电机的定位精度实验及高速磨削电主轴振动实验研究,以及控制系统的仿真分析,证明了该集成系统的可行性. 相似文献
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A simulation platform for optimal selection of robotic belt grinding system parameters 总被引:1,自引:1,他引:0
Shuihua Wu Kazem Kazerounian Zhongxue Gan Yunquan Sun 《The International Journal of Advanced Manufacturing Technology》2013,64(1-4):447-458
Robotic belt grinding is an effective process for removing material from geometrically complex workpieces. However, due to the relatively low stiffness of the system, the grinding quality is prone to inaccuracies caused by system dynamics. In order to control the quality of the grinding process, a profound understanding of the system is required. This paper presents a platform for comprehensive modeling and simulation of the robotic belt grinding system. The system kinematics model is based on the CAD model of the workpiece in composition with robot kinematics. The dynamics model is a comprehensive combination of the dynamics of the robot, the grinder, and the interaction between the grinder and the workpiece. A material removal model of the grinding process, which can adapt to workpieces with complicated shapes, is also developed and presented. The system simulation shows that optimal selection of key control parameters of the grinder and proper selection of robot control strategies can efficiently suppress chatter in the grinding process. Furthermore, having the ability to predict material removal rate, the comprehensive simulation platform is also demonstrated to be a strong tool in selecting the grinding process key parameters, namely, robotic velocity and contact force, for the control of material removal to meet dimensional accuracy requirements on workpieces. 相似文献