摘  要:隨著科學技術的發展，人們對自動化的要求越來越高。組合機床的應用也越來越廣泛，與此同時對它的自動控制要求也變得更加嚴格。它使生產加工變得更加便捷，效率也大大的提高。“組合機床”屬于開關量控制系統。可選擇的系統有：繼電器控制系統；可編程控制系統；計算機控制系統；單片機控制系統。而PLC程序控制系統以其適應性強、可靠性高、設計調試方便等，在許多工業部門得到了應用。

　　本設計以多工位組合機床的PLC控制系統的設計為研究對象以及機床的工作過程和控制要求進行分析。在此基礎上，進行了系統控制方案的確定。主要包括工作臺的旋轉、上料、鉆孔、擴孔、攻絲、冷卻、下料等。這一系列動作都靠電動機的拖動來完成。同時也給出了：主電路接線圖、狀態分配圖、PLC接線圖、I/O分配圖、PLC梯形圖等。

　　在PLC的編程指令中，主要選用的是步進指令。步進指令在編程和讀寫的時候便于讀寫，也便于理解。

關鍵詞：組合機床；PLC；控制系統

ABSTRACT:With the development of science and technology, people have become increasingly demand for automation. The combinations of machine tool applications are increasingly being used, at the same time its automatic control requirements are becoming more stringent. It makes the production and processing become more convenient, efficiency is greatly improved. “Modular Machine Tool” is a volume control switch system. Alternative system: relay control system; programmable control system; computer control system; single chip control system. PLC program control system for its adaptability, high reliability, easy to design and debug, and has been applied in many industrial sectors.

　　　The designs to multi-station combination machine PLC control system design for the study and machine work process analysis and control requirements. On this basis, the determination of the system control program. Including the rotation of the table, feeding, drilling, reaming, tapping, cooling, cutting and so on. This series of actions by the drag of the motor to complete .At the same time also presents: the main circuit wiring diagram, state diagram, PLC diagram, I/O diagram, PLC ladder diagram etc.

　　　PLC programming instructions, optional step instructions. Step instructions in the programming and read and write easy to read and write, but also easy to understand.

Keywords: combination machine, PLC, control system