文档介绍：摘要
本课题探讨了T68型卧式镗床的用PLC改造控制系统的实现方案。镗床是冷加工中使用比较普遍的设备它主要用于加工精度、光洁度要求较高的孔以及各孔间的距离要求较为精确的零件(如一些箱体零件),属于精密机床。主要用于加工工件上的精密圆柱孔。这些孔的轴心线往往要求严格地平行或垂直,相互间的距离也要求很准确。其原控制电路为继电器控制,接触触点多、线路复杂、故障多、操作人员维修任务较大。为了克服以上缺点,降低设备故障率,提高设备使用效率,我们用PLC控制改造其继电器控制电路。
通过对T68型卧式镗床工作原理的分析,设计出PLC改造系统的控制电路。选用德国西门子公司生产的S7-200可编程序控制器,分配PLC的I/O地址,设计PLC外围电路,确定PLC的I/O接线图。根据镗床的控制要求和特点,列出逻辑代数表达式,采用逻辑设计方法进行梯形图设计。最终达到了系统改造的要求,并且运行效果良好。
关键词: 可编程控制器; T68镗床; 梯形图
ABSTRACT
T68 of the topics discussedis the type Horizontal Boring Machine transformation of the PLC program control system. Boring is the mon use of cold working of the equipment it is mainly used for precision machining, finish the hole and the higher the distance between the holes require a more precise parts (such as some of tank parts), are precision machine tool. Mainly used for precision machining of cylindrical workpieces on the hole. Axis line of these holes tend to demand strict parallel or perpendicular to the distance between each other also requires very accurate. Its original control circuit for the relay control, contact-contact and plex circuits, fault and more the operator a larger maintenance tasks, in order to e the ings of the above, reducing the failure rate of equipment to improve efficiency in the use of the equipment, we to transform their use of PLC control relay control circuit.
T68 through horizontal boring machine working principle of the analysis, design of PLC control circuit transformation pany selected the S7-200 PLC, the distribution of PLC's I / O addresses, the design of peripheral circuits PLC, PLC to determine the I / O wiring diagram. Boring machine control in accordance with the requirements and characteristics are listed in the logic of algebraic expressions, the use of ladder logic design methods design. Reached the final system requirements, and run well.
KEY WORDS: programmable logic controller; T68 boring machine; ladder
目录
前言 1
1 T68卧式镗床的结构和运动形式 2
T68卧式镗床控制原理 2
T68型卧式镗床的结构