在分析胀管机传统的继电器控制系统缺点的基础上 ,论述了 PC在胀管机中的应用及控制程序的编制。研究结果表明 ,采用先进的 PC控制取代传统的继电器控制 ,使胀管机的可靠性及先进性等大为提高。 Based on the analysis of the shortcomings of traditional relay control system of expander, the application of PC in expander and the compilation of control program are expounded. The results show that the use of advanced PC control instead of the traditional relay control, so that the reliability and advanced tube expander and so greatly improved.