【作者】 黎宏飞；

【导师】 龚邦明；

【作者基本信息】 西南交通大学 ， 机械工程， 2011， 硕士

【摘要】 随着中国铁路建设的发展,铁路运输朝着高速、安全、舒适的方向迈进,钢轨作为承载机车车辆运行的媒介,更是在铁路建设中有着举足轻重的作用,高速铁路的发展,极大的推动了无缝钢轨在高速铁路中的应用。在无缝钢轨加工的过程中,将标准长度的钢轨焊接成轨道,在焊接接头的地方,会产生焊瘤,如何高效的处理焊瘤就成为了制约无缝钢轨在高速铁路中应用的关键。传统的无缝钢轨焊缝处理手段效率低下,显然无法满足无缝钢轨在高速铁路建设中的需求。因此急需高自动化的、适用于车间生产的钢轨打磨设备对钢轨焊接接头进行处理。国内外许多科研机构和机床生产厂家,如上海理工大学附属二厂、法国的拉伊台克公司和吉斯玛公司等,都对无缝钢轨精磨机进行了研究,并设计有产品在生产应用。国内的焊轨厂大多采用进口国外的磨削机床对钢轨焊缝进行处理,而进口设备存在价格高、代价大、操作学习周期长、维修不便和语言障碍等弊端。面对国内外钢轨焊缝处理的现状,在导师的指导下,产生了一种新的钢轨焊缝磨削的方法,提出数控仿形磨削的无缝钢轨焊缝磨削方案,利用数控插补的原理,以VERICUT数控仿真软件为平台,建立数控钢轨精磨机机床模型,并根据加工对象编写数控加工程序——G-代码。在磨削加工过程中,磨床的打磨头按照数控程序编制的轨迹运行,精确磨出形面。最后,应用VERICUT仿真软件的AUTO-DIFF(自动检测)功能对加工模型的加工质量与设计模型要求的加工质量进行比较检测,应用VERICUT仿真软件的OptiPath(优化)功能,对编写的数控加工程序进行优化。更多还原

【Abstract】 With the development of railway construction in China, the railway transportation toward in the direction of high-speed, safety, and comfort. The rail is playing an important role as a medium for carrying the rolling stock. The development of the high-speed railway, greatly promoted the continuously welded rails in application of the high-speed railway.When the standard length of rail is welded into railway in the course of the continuously welded rails processing, there is overlap which appears in the welded joint. It is a critical that conditions the continuously welded rail using in the high-speed railway, about how effective to deal with the overlap.The traditional means about the overlap of the continuously welded rail are inefficient, obviously, the existing continuously welded rail can not meet the demand for the high-speed railway construction. Therefore, the high automation and apply to workshop production rail grinding equipment is needed for processing of the railway welded joint. Many domestic and foreign research institutions and machine tool manufactures, like University of Shanghai for Science and technology subordinate shopⅡ, Railtech International France company and GEISMAR France company. They researched on the continuously welded rail grinding machine, and there are productions using in practice. Most of the domestic rail welding factory imported the grinding machine tool abroad for processing the overlap of the continuously welded rail, however, there are high price, cost of large, long learning cycle operation, inconvenient maintenance, language barriers and so on disadvantages for the imported machine.There is a new method for grinding the overlap of the railway, facing to the domestic and international status about the overlap of the railway process. It proposes the application of the concept of the numerical control profile grinding, using numerical control interpolation principles and the VERICUT numerical control simulation software platform, then, refining the model of the numerical control railway grinding machine tool, and programming the G-code according to the processing objects. In the grinding process, the grinding wheel of the grinding machine accordance with the numerical control program to run the track, and precise grind-shaped surface. Finally, compare the surface of the processing model with the design model, by using AUTO-DIFF (automatic detection) which is the function of the VERICUT simulation software, and using OptiPath (optimization) which is the function of the VERICUT simulation software optimize the numerical control program.更多还原