【正文】
移動) :縱向運動(工作臺沿床身的往復(fù)運動) 。 一般用于對零件淬硬表面 做磨削加工。 使用編程軟件可以在計算機屏幕上直接生成和編輯梯形圖或指令表程序,并且可以實現(xiàn)不同編程語言之間的轉(zhuǎn)換。 I/O 模塊除了傳遞信號外,還有電平轉(zhuǎn)換與隔離的作用。開關(guān)量輸出模塊用來控制接觸器、電磁閥、電磁鐵、指示燈、數(shù)字顯示裝置和報警裝置等輸出設(shè)備;模擬量輸出模塊用來控制調(diào)節(jié)閥、變頻器等執(zhí)行裝置。 CPU 模塊主要有微處理器和存儲器組成。 PLC 的基本結(jié)構(gòu) PLC 實質(zhì)是一種專用于工業(yè)控制的計算機,其硬件結(jié) 構(gòu)基本上與微型計算機相同,基本構(gòu)成為: a、電源 : PLC 使用 AC220V 電源或 DC24V 電源。 國際電工委員會( IEC)在 1985 年的 PLC 標準草案第 3 稿中,對 PLC 作了如下定義:“可編程控制器是一種中數(shù)字 運算操作的電子系統(tǒng),專為在工業(yè)環(huán)境下應(yīng)用而設(shè)計。 關(guān)鍵詞 : PLC、平面磨床 M71電氣控制系統(tǒng)、改造 Abstract This paper introduces the electrical control system with PLC transformation through the transformation of electric control system of grinding machine M7130, this paper firstly gives an introduction of the surface grinding machine ( including the movement form, the main circuit, control circuit and so on ), and then to PLC are briefly introduced, and then the transformation process are introduced, including how to through the realization of PLC control of conventional relay requirements are introduced in detail in this paper. Through this paper, readers will be on PLC to transform the traditional relay control system to have a certain understanding, also know some of the advantages of using PLC transformation, the most important is the application of PLC in the production process. Keywords :PLC, M7130 plane grinder, electric control system, reform 4 目錄 摘 要 .................................................................................................................................................3 第一章 PLC的介紹 .............................................................................................................................5 ....................................................................................................................5 PLC的基本結(jié)構(gòu) ....................................................................................................................5 第二章 M7130型平面磨床概述 ...........................................................................................................7 第三章 M7130平面磨床的主要運動形式和控制要求 ...........................................................................8 、主運動: ............................................................................................................................8 、進給運動: ........................................................................................................................8 . 1工作臺的往復(fù)運動(縱向進給): .............................................................................8 砂輪架的橫向(前后)進給: ....................................................................................8 砂輪架的升降運動(垂直進給): ..............................................................................8 : ...........................................................................................................................8 工件的夾緊 : .............................................................................................................8 工件的冷卻: .............................................................................................................8 第四章 M7130平面磨床的電路分析 ....................................................................................................9 . M7130平面磨 床電氣原理圖 ................................................................................................9 如圖 41所示 ...................................................................................................................