2、程序的编制及整个模拟演示程序。在分析了扩口机工作流程的基础上，进行了PLC控制系统的硬件设计和软件设计。硬件部份重点介绍了温控部分设计的思路和采取的设计方案；软件设计则重点介绍了自动工作程序编制的方法、以及为提高机床工作的可靠性、经济性、以及提高其自动化程度、实现工步之间的约束条件、联锁保护采取的措施。除了原理设计以外，还对控制系统进行了工艺方面的设计。关键词 ： 控制系统 PVC生产线 SKG-400扩口机 PLC 25AbstractAbstractBelling machine is a important part in the
3、PVC tube production line. According to different request, it since can singlely go, again can with extruder, cutting machine etc. Online constitute a production line. This paper inquires into SKG-400 belling machine electric -control system in adoption of programmable logica
4、l controller (PLC) with high credibility and the strong anti- interference ability, which is the technique that the lord is controlled a parts to carry out, elaborating it the function and the advantage in belling machine electric-control system design.According to the char
5、acteristics of high reliability and bulgingcomplications requests in the process of the pipe material to bell.Concretely studying the configuration of Hardware, the software programming and the whole simulation program. In analyzing to bellingmachine workflow foundation, th
6、is paper gives the PLC control system of the hardware design and software design. Design method and design planadopted of temperature control system is introduced respectivelyin hardware part.Then, The software design gives emphasis to method of automatic work procedure to d
7、raw up and measures of adopting in the credibility of the tool machine work, economy,its stipulation condition ,carrying out of constraint condition between steps and interlock protection. In addition to the principle design,this paper also designs control system in process
8、technology. Keywords control system PVC product line SKG-400 belling mac
