Explains a technological demand for the process of pipe fittings reducer in a machine-building plant, introduces a application of PLC in the center control system of the machine tool, and distribution diagram. The outer circuit diagram and ladder diagram are given. 阐述了某机械制造厂的管件缩径机床缩径过程的工艺要求,介绍了PLC在用于该工序加工的机床控制系统改造中的应用,给出了I/O分配图、外部接线图和梯形图。
Control Way for Noise Pollution in Machine-Building Plant 机械制造工厂噪声污染的控制对策