1摘 要緊固件組合機床及其自動線在當今機械制造業(yè)中扮演著越來越重要的角色，其技術性能和綜合自動化水平在很大程度上決定著相關部門的發(fā)展。隨著科學技術的不斷發(fā)展，傳統(tǒng)的以繼電器控制為基礎的緊固件組合機床愈加與先進生產(chǎn)力不相適應，在這種情況下，可編程序控制技術以其靈活性好，可靠性高，通用性強，逐漸取代了繼電器控制方式，成為當代工業(yè)控制的主要發(fā)展方向。本論文詳細敘述了緊固件組合機床的 PLC 控制系統(tǒng)的設計,分析了系統(tǒng)的主電路及控制電路圖，并根據(jù)系統(tǒng)運行要求，確定了機床及控制系統(tǒng)的元件型號，作出了 PLC 的外部接線圖。文本利用西門子 S7-200PLC 分別從全線自動，單機半自動，單機手動三種工作方式對裝卸、打中心孔、鉆孔、倒角、擴孔以及攻絲加工六工位緊固件組合機床的程序的設計。關鍵詞： 緊固件組合機床 PLC 程序設計2ABSTRACTCombination machine tools and automatic line plays a more and more important role in today's machinery manufacturing industry, the technical performance and the comprehensive automation level decides the development of relevant departments in the very great degree. With the development of science and technology, the traditional based on relay control combined machine tool cannot adapt to the advanced productivity, in this case, the programmable control technology for its good flexibility, high reliability, strong universality, gradually replaced the relay control, has become the main direction of development of modern industrial control.This paper describes the design of the PLC modular machine tool control system, analyzes the main circuit and control circuit diagram, and according to the system operation requirements, the machine and the control system component model, make the external wiring diagram of PLC.The Siemens S7-200PLC respectively from the automatic, semi-automatic machine, design program of stand-alone manual three kinds of work for loading and unloading, the center hole drilling, drilling, chamfering, reaming and reaming six station combination machine.Keywords: combination of machine tool of PLC program design3目 錄摘 要 ..........................................................................................................................IABSTRACT..............................................................................................................II第 1 章 緒論 .............................................................................................................11.1 課題研究的意義 ........................................................................................11.2 國內緊固件組合機床控制系統(tǒng)的發(fā)展現(xiàn)狀及趨勢 ................................21.3 PLC 技術的發(fā)展及趨勢 .............................................................................31.4 本文的設計任務 ........................................................................................4第 2 章 緊固件組合機床工作原理及方案論證 .....................................................52.1 緊固件組合機床的工藝流程 ....................................................................52.2 控 制 系 統(tǒng) 體 系 結 構 分 析 ..................................................................62.2.1 系統(tǒng)結構分析 .................................................................................62.3 控制方案論證 ....................................................................................62.4 西 門 子 STEP 7 簡 介 ........................................................................92.5 本章小結 ..........................................................................................12第 3 章 緊固件組合機床系統(tǒng)硬件設計 ...............................................................133.1 緊固件組合機床控制系統(tǒng)結構組成 ......................................................133.2 PLC 和 I/O 擴展模塊的選型 ....................................................................133.4 I/O 點及數(shù)據(jù)儲存地址分配 .....................................................................133.4 系統(tǒng)電氣原理圖的設計 ..........................................................................153.5 本章小結 ..................................................................................................17第 4 章 緊固件組合機床系統(tǒng)軟件設計 ...............................................................184.1 系統(tǒng)程序設計方法 ..................................................................................184.2 PLC 程序的設計 .......................................................................................194.3 PLC 程序的說明 .......................................................................................24第 5 章 總結與展望 ...............................................................................................285.1 總結 ..........................................................................................................285.2 展望 ..........................................................................................................28參考文獻 .................................................................................................................294致 謝 .............................................................................................................30