The automation degree of the ductile iron pipe production line is constantly improving. There are a large number of lifting, lifting, swinging arm, and blocking and shifting mechanisms in the production line, most of which require accurate positioning. With the continuous improvement of environmental protection requirements, the hydraulic power system is gradually replaced by a more environmentally friendly power mode due to the pollution of its hydraulic oil. Among them, the pneumatic drive system of compressed air is receiving more and more attention due to its cleanliness and energy conservation.However, pneumatic control has been lacking in effective means for precise positioning. This paper provides a pneumatic control idea and method based on servo system, with the goal of improving the accuracy of pneumatic control.

文章介绍了离心球墨铸铁管采用电磁超声技术进行在线测厚的开发过程,包括系统原理、系统组成、系统创新点、系统关键技术等方面,开发实现了离心球墨铸铁管壁厚在线检测,为国内首创,促进了离心球墨铸铁管壁厚均匀性提高和铁耗的减少,取得了显著的经济和社会效益.