【正文】 三 江 學(xué) 院 本科畢業(yè)設(shè)計(jì)（論文） 課題名稱 PLC 在冷陰極燈管生產(chǎn)線的設(shè)計(jì)應(yīng)用 電氣工程 系 電氣工程自動(dòng)及其自動(dòng)化 專業(yè) 學(xué) 號(hào) Z04071013 學(xué)生姓名 房櫻燕 指導(dǎo)教師 熊田忠 起訖 日期 ~ 工作地點(diǎn) 實(shí)驗(yàn) 樓 L408 I 摘 要 目前，在冷陰極燈管（ CCFL）生產(chǎn)線上，大多使用手工生產(chǎn)。由于冷陰極燈管細(xì)小且易碎，人工生產(chǎn)工作量大，導(dǎo)致生產(chǎn)效率低，同時(shí)也會(huì)產(chǎn)生生產(chǎn)質(zhì)量上的問題。本文的目標(biāo)是：采用西門子 S7300 PLC 對(duì) CCFL 的后續(xù)生產(chǎn)工序進(jìn)行自動(dòng)化改造，以提高產(chǎn)品的生產(chǎn)效率。 文中分析了 CCFL 后續(xù)的大致生產(chǎn)工藝。進(jìn)行了生產(chǎn)線的硬件設(shè)計(jì)，包括 PLC、 SM輸入 /輸出模塊、 MM420 變頻器及電機(jī)等部分。軟件設(shè)計(jì)利用 STEP7 編程，主要有變頻器控制電機(jī)運(yùn)轉(zhuǎn)、機(jī)械手控制產(chǎn)品上線傳送、功能檢測、清潔、計(jì)數(shù)及移位、自動(dòng)包裝等六個(gè)部分。所有程序在 S7PLCSIM 中仿真并下載至硬件進(jìn)行調(diào)試。 仿真和硬件調(diào)試的結(jié)果符合 CCFL 生產(chǎn)工藝要求，自動(dòng)化程度大為提高，具有很好的應(yīng)用價(jià)值。 關(guān)鍵詞： CCFL 生產(chǎn)線； PLC；軟件編程；仿真；調(diào)試 II Abstract At present, owing to the thinness and fragileness, the Cold Cathode Fluorescent Lamp (CCFL) on assembly lines mostly depends on manual work which consumes much labor and results in low production efficiency and poor product quality. The target of this paper is that the automated modification by using the Siemens S7300 PLC in the CCFL’s subsequent production process will improve the efficiency. This paper analyzed the CCFL’s subsequent production process and designed the hardware of the assembly lines, including PLC, SM Input/Output Module, MM420 Frequency Conversion and Motor, etc.. The design of the software used STEP7 to program, including such six parts as motor control by frequency inverter, workpiecesupplymanipulator control, functional check, cleaning, counting and transfer, automatic packing. All the programs were simulated in S7PLCSIM and loaded down to the hardware to debug. The result of the simulation and the hardware debugging matched the demand of the CCEF’s production process and brought great improvement in the automatization, showing that the design had great value on the application. Key words： CCFL assembly line； PLC； software program； simulation； debug III 目 錄 第一章 緒論 ........................................................................................................................... 1 課題的工程背景 ........................................................................................................ 1 可編程序控制器 （ PLC）的誕生背景及意義 ..................................................... 1 冷陰極燈管（ CCFL）的概念及現(xiàn)狀 ................................................................. 2 目的及意義 ................................................................................................................ 3 課題的研究目的 ............................................................................................. 3 課題的研究意義 ............................................................................................. 3 論文的主要內(nèi)容 ......................................................................................................... 4 第二章 CCFL’assly 工藝過程分析 ......................................................................................... 5 CCFL 的原理 .............................................................................................................. 5 CCFL’assly 的大致生產(chǎn)過程 ..................................................................................... 5 線材裁切 .......................................................................................................... 6 線材組立 ........................................................................................................ 6 燈管前置 ........................................................................................................ 6 燈罩前置 ........................................................................................................ 6 燈管焊接 ........................................................................................................ 6 燈管組裝 ........................................................................................................ 7 第三章 控制系 統(tǒng)硬件設(shè)計(jì) ........................................................................................................ 8 PLC類型的選擇 ......................................................................................................... 8 西門子 S7300系列 PLC的基本結(jié)構(gòu) ................................................................ 8 PLC 的物理組成部分 ......................................................................................... 8 變頻器（ MM420）及電機(jī) ........................................................................................... 10 MM420 變頻器的概況 ...................................................................................... 10 MM420 變頻器的特點(diǎn) ...................................................................................... 10 MM420 變頻器的典型應(yīng)用 ............................................................................... 11 第四章 控制系統(tǒng)軟件設(shè)計(jì) .........................................