毕业设计 YT型组合机床动力滑台液压系统的PLC改造.docVIP

毕业生论文 YT4543型组合机床动力滑台液压系统的PLC改造 ２００７年６月 摘要 组合机床是由通用部件和部分专用部件组成的高效、专用、自动化程度较高的机床。动力滑台是组合机床的一种通用部件。 本课题涉及到的YT4543型原有组合机床液压动力滑台的电气部分采用继电器控制系统，存在可靠性不高，故障发生率高，维护困难；继电器线路接线复杂；若工艺流程改变，则需要改变相应的继电器控制系统的接线等问题。 由于可编程序控制器具有较高的可靠性，控制过程中能得到良好的控制精度，以及能够轻而易举地实现工业自动化；另外，还具有易维护，操作简便等一系列优点。可编程序控制器在现代工业中得到了大量而广泛的应用。 本课题正是基于以上原因，从实际应用的角度出发，以可编程序控制器（PLC）为基础，以YT4543型原有组合机床液压动力滑台为改造对象，在深入了解YT4543型原有组合机床液压动力滑台工作原理的基础上，利用性能优良、价格合理的三菱FXos-30MR-D超小型PLC对YT4543型原有组合机床液压动力滑台实施改造，形成PLC控制的组合机床液压动力滑台。从而克服了原有缺点，提高了机床的可靠性，同时给系统的维护和改进带来了很大方便。 实践证明，通过改进，既可提高系统的可靠性，又可以通电编程，灵活改变其控制顺序，达到了应用的目的，取得了良好的工作性能和经济效益。 关键词：可编程控制 继电器 液压动力滑台 Abstract: The combination machine bed constitute efficiently with parts of appropriations parts from the in general use parts, appropriation, automation higher machine in degree bed.The slippery set in motive is a kind of in general use parts to combine the machine bed. This lesson a the type of YT4543 for involving combines originally possessed the motive that machine bed liquid press electricity part adoption slips the set to control the system after the electric appliances, exsitting the dependable is not high, breaking down to take place the rate high, maintenance difficulty;Connect the line complicacy after the electric appliances circuit;If the craft process changes, then need the changes homologous control after the electric appliances the system connect line etc. problem. Because the programmable preface controller has the higher and dependable, the control process inside can get the good control accuracy, and can realizes easily industry automation;Moreover, still have the easy maintenance, operate a series of advantage in simple etc..The programmable preface controller got large quantity in modern industry but extensive application. In this lesson a foundation for exactly according to above reason, from the actual and applied angle setting out, regarding programmable preface controller( PLC ) as foundation, with the type of YT4543 originally possessed combining machine