【作者】 曾小松；

【导师】 龚邦明；

【作者基本信息】 西南交通大学 ， 机械制造及其自动化， 2013， 硕士

【摘要】 随着中国乃至世界开始迈向“高铁时代”,人们更多的开始关注高铁技术的发展。铁轨作为列车运行的平台,其基础作用是不言而喻的。当前发展的无缝线路是由单根标准长度为25m或者12.5m的钢轨焊接而成的,焊接产生的焊接瘤则成为影响钢轨平直度的主要因素,因此,研制相关的打磨设备是必要的。目前主流的打磨设备是数控钢轨精磨机,本文设计的摇摆系统作为钢轨精磨机仿形打磨的重要组成部分,其研究是有很强的现实意义的。本文首先针对数控钢轨精磨机打磨箱的一般工作特点,提出了机械系统的整体设计方案,通过对传动装置的设计和电机的计算选型,保证了负载各项运作要求能够实现。其次,通过对钢轨断面的特征分析,设计一种算法使钢轨接头外形尺寸在磨头打磨后能够得到保证。即：假定两个打磨点是相邻的,那么两点之间的焊接瘤是不需要打磨的,也就是说这两点之间焊接瘤的高度是低于或等于最大允许偏差值的,在这个条件的基础上再结合几何关系就能计算出两打磨点之间磨头的转动角度。然后进行控制系统设计,包括总体设计、硬件设计和软件设计。本文选用三菱FX2N系列PLC、定位模块、MR-J3系列驱动器、HF-SP系列伺服电机以及接近开关组成闭环和半闭环系统保证了定位控制的精度。选用三菱GOT-A900系列触摸屏作为人机界面,方便了工人的操作。由GX Developer软件编写出的梯形图控制程序与控制硬件的结合使磨头的精确定位控制得到了实现。本系统的设计为今后钢轨精磨机的进一步研究奠定了基础,也可为其他定位控制提供借鉴。更多还原

【Abstract】 As China and even the world began to move towards "high-speed rail era", the more and more people begin to pay attention to high-speed rail technology. The tracks as a train platform, its fundamental role is self-evident. The current CWR rail is welded together by single standard rail with25m or12.5m length, Welding tumor have become major factors affecting steel rail straightness, Therefore, development of polishing equipment is necessary. At present, the mainstream is the NC rail grinding machine, An important part of the system as a swing grinding rail refining mill profile, its research is a very strong practical significance.Firstly,the NC rail refining mill grinding box generally work, puts forward the overall design scheme of mechanical system, Through the calculation and selection of design and motor for driving device, ensure the operation load requirements to achieve. Secondly, through analysis of the characteristics of the rail profile, provides a guarantee grinding track rail joint dimension algorithm. Namely:suppose two grinding is adjacent, then welding tumor between two points is not need grinding, That is highly welding tumor is less than or equal to the maximum allowable deviation value between these two points, At the basis of this condition combined with the geometric relationship between the two can be calculated between the grinding head rotation angle. Then the control system design, such as the overall design, hardware design and software design. This paper selects the Mitsubishi FX2N series PLC, positioning module, MR-J3series, HF-SP series servo motor drive and proximity switch to form a closed loop and half closed loop control system to ensure the positioning precision. The Mitsubishi GOT-A900series touch screen as man-machine interface, convenient for the operation of workers. Combined with the control ladder diagram program and control hardware is written by GX Developer software to make precise positioning head control is realized. The design of the system has laid the foundation for the further study in the future rail refining mill, also can provide reference for other positioning.更多还原