The Research Of NC Lathe Control System Used For Refabrication Of The Train Wheels

In our country, the railway transportion always palys an important part in passenger transport and freight transport. From the year of2003, the speed of railway in our country has increased for seven times. When the trains are in work, the wheels are unavoidable to be frayed. So it is necessary to mend these frayed wheels atregular intervals in order to make sure the safety on the railway. But the way of mending wheels today still adheres the old step which the wheels are first disassembled and then mended. However, it brings some troubles because the linking structure of the train wheels is very complex. In addition, it also produces much inconvenience in transportion because of its big size and heavy weight. As the Machine Tool used for machining nowdays is very expensive, it generates much financial pressure to some small and medium-sized enterprises.Given all above problems, zibo Huatie locomotive repairation Co., LTD. with Shandong Unversity of Technology co-operate and establish research plan to change the traditional machining method from disassemble to process. First, buy the turning-lathe body produced by specialized factory and numerical control system ensuring maching demand,then assemble and debug the pint-sized numerically controlled lathe which has been used in practice. When we are in work, we can use hauling-up device to jacking the railway carriage for enough space in order to carry through field processing which we find another problems at the same time. First, as the sketch of rail wheel is consist of straight and circular arc, if we proceed manual programming, it brings in vast calculated amount and badly reduces our productivity. Second, we can't complete machining in one time because of the huge hardness. So we must programme many a time taking more difficulty for us. Given that these problems found in practice, automatic programming module is needed to join into the system. Besides, author apply the improved Point-to-Point comparison method which can simplify programming and improve machining precision into the design of new system.