【作者】 修磊；

【导师】 龚邦明；

【作者基本信息】 西南交通大学 ， 机械制造及自动化， 2012， 硕士

【摘要】 随着社会的不断发展,交通运输方面也在不断发展,铁路是我国重点发展的基础设施,未来的铁路将朝着高速化,重型化和现代化三个方面发展。钢轨与钢轨之间是通过焊接技术将两根钢轨连接在一起的,它们之间的连接处就会形成焊瘤,正因为焊瘤的存在,列车在行车时会使行驶的阻力增大,不利于列车高速行驶,大大降低了机车跟钢轨的使用寿命,从而会增加铁路的各种费用,因此对于接口焊缝的打磨有了更高精度的要求。单根铁路钢轨的长度只有25米或者100米,必须通过焊接技术将多根钢轨焊接成为长度为500米的钢轨,数控钢轨精磨机通过精磨使接头处的平直度达到使用要求,因此钢轨精磨机摆动系统结构的设计及左右摆动系统的控制设计对于我国铁路的发展有重大意义。本论文着重对数控钢轨精磨机进行总体布局、钢轨焊缝磨削层分析、左右摆动系统的结构方面以及左右摆动系统控制方面的设计。数控钢轨精磨机的总体方案的设计,主要考虑了精磨机机架、走行车及整机主体保护、横梁、垂向进给系统和左右摆动系统、电气控制系统和液压传动系统、还有除尘装置等几个方面。钢轨的磨削层分析主要针对钢轨焊缝进行分析,包括磨削对象分析、磨削方式分析、磨削过程分析等三个部分；数控钢轨精磨机的左右摆动系统进行结构的设计主要包括左右摆动系统传动方案的设计及其各个传动的形式和尺寸的确定；在控制系统上,摆动机构采用了大扭矩三相混合式步进电机,通过PLC控制系统发出不同个数以及不同频率的脉冲完成对步进电机转角及速度的控制,最终实现了摆动机构不同角度和不同速度的进给。通过对上面几个方面的研究,本文设计的左右摆动系统结构设计及其控制基本符合预定的要求,改变了比较落后、低效的钢轨精磨技术,使钢轨精磨机能够运安全平稳高效的运行。更多还原

【Abstract】 With the continuous development of society, the transportation is also in constant development. Railroad is our country focus on the development of the infrastructure. The railway of the future will be towards high speed, heavy industrialization and modernization development in three areas. Rail and rail are connected through welding technology to make them connected together,and overlap will appear in the interface between the two rail.These overlap can to reduce the running resistance, increase the running speed of the trains, locomotives vehicle life, reduce line maintenance and repair costs for passengers to provide a smooth and comfortable travel conditions have a negative influence. Single rail length is only25meters or100meters, and it must be weld through a plurality of rail welding technology to be500meters long steel rail, refiner make joints flatness requirement.Therefore, Rail grinding machine swing system structure design and swing control system design for railway development in China is of great significance.This paper focuses on the Numerical Control rail mill overall layout, the structure of swing system and design of hydraulic transmission system. In the design process of Numerical Control rail refining mill overall plan, the main considerations are these several aspects which are the machine frame,go driving and machine body protection, cross beam, vertical feed system and pendulum system, electrical control system and hydraulic transmission system, and the dust removing devices. The design of the Numerical Control rail grinding machine servo system for swing structure mainly includes the swing system of transmission scheme design and each drive form and size determination. Layer analysis of rail grinding including grinding object analysis, the grinding method analysis and grinding process analysis of three parts; In the control system, the swing mechanism adopts the large torque three-phase hybrid stepping motor. Through the PLC control system sends a different number and different frequency pulse complete the rotation angle of the stepping motor and speed control.Finally the swing machanism can operate with different angles and different speed.Based on the above research, this paper design of the swing system structure design and it’s control system are in accordance with predetermined requirements, which will change the backward, inefficient rail grinding technology, what’s more what I have done makes the rail grinding machine can be transported safely and stably running.更多还原