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運轉(zhuǎn)；接觸器KM3主觸點用來自動控制刀盤減速電機的正轉(zhuǎn)；接觸器KM4主觸點用來 自動控制刀盤減速電機的反轉(zhuǎn)；熱繼電器RJ1、RJ2分別實現(xiàn)對機械手電機和刀盤電機 的過載保護。<br /> 控制柜面板處設(shè)有電源啟動、電源停止、電源急停和報警機構(gòu)指示燈四個按鈕， 電源啟動按鍵控制接觸器KM1線圈得電、輔助觸點的自鎖、主觸點的吸合，電源啟動 按鍵自帶綠色指示燈，顯示主電路的工作狀態(tài)。電源停止按鈕可以切斷主電路，在發(fā) 生緊急情況時，可以人為的停止刀庫的運轉(zhuǎn)，電源停止按鈕自帶常亮紅色指示燈，在 發(fā)生危險時易于辨認(rèn)。C1繼電器觸點線圈接入PLC輸出端，控制繼電器觸點的通斷， 從而控制預(yù)警機構(gòu)的動作。<br /> 3.1.2輔助電路電氣控制電路設(shè)計<br /> 盤式刀庫換刀系統(tǒng)可靠性試驗臺輔助電路如圖3.2所示。空氣開關(guān)QS1對控制輔 助電路的起到總體保護作用；接觸器KM1主觸點用來控制輔助電路總體的通斷；QS4 控制所有繼電器的通斷，同時為24V電源引入220V電壓；繼電器A1用來控制接觸器 KM2線圈的通斷，A1的常開觸點由PLC直接引出，由PLC控制繼電器A1常開觸點 的吸合；繼電器Bl、B2分別用來控制接觸器KM3和KM4線圈的通斷，Bl、B2的常<br /> 開觸點同樣由PLC直接引出，由PLC控制繼電器Bl、B2常開觸點的吸合;<br /> QS1 KM1</p> <p>圖3.1主電路電氣控制電路<br /> 3.1.3試驗臺動作流程分析<br /> 1. 刀庫電路控制：首先閉合總開關(guān)QS1,電源停止按鈕紅色指示燈常亮；按下電源 啟動按鈕，接觸器線圈KM1得電，KM1輔助觸點得電吸合并形成自鎖，KM1主觸點 得電吸合，整個電氣控制系統(tǒng)接通；按下電源停止按鈕或者電源急停按鈕，接觸器KM1 線圈失電，KM1輔助觸點、主觸點斷開，整個電氣控制系統(tǒng)失電，刀庫停止動作。<br /> 閉合機械手減速電機空氣開關(guān)QS2和刀庫減速電機空氣開關(guān)QS3,刀庫動作電路 接通；PLC輸出信號至繼電器A1線圈，A1常開觸點吸合，接觸器KM2線圈得電， KM2主觸點吸合，機械手減速電機得電開始運轉(zhuǎn)；同理，PLC輸出信號至繼電器B1 線圈，B1常開觸點吸合，接觸器KM3線圈得電，KM3主觸點吸合，刀盤減速電機得 電開始正轉(zhuǎn)；當(dāng)繼電器B2線圈得電時，B2常開觸點吸合，接觸器KM4得電，KM4 主觸點吸合，刀庫減速電機反轉(zhuǎn)。刀庫旋轉(zhuǎn)方式由PLC程序依據(jù)目標(biāo)刀號就近原則進 行選擇。</p> <p>圖3.2輔助電路電氣控電路<br /> 2. 氣缸動作：氣缸動作由PLC通過三位五通電磁閥進行控制。倒刀時，PLC向繼 電器D1發(fā)出命令，D1線圈得電，D1常開觸點閉合，三位五通電磁閥倒刀氣路接通， 倒刀動作執(zhí)行；回刀時，PLC向繼電器D2發(fā)出命令，D2線圈得電，D2常開觸點閉合， 三位五通電磁閥回刀氣路接通，回刀動作執(zhí)行。<br /> 3. 預(yù)警執(zhí)行機構(gòu)控制：繼電器C1由PLC控制，正常工況下，繼電器C1線圈未得 電，預(yù)警執(zhí)行機構(gòu)不動作；當(dāng)傳感器實時傳至上位機的信號超過預(yù)警閾值時，PLC向 繼電器C1發(fā)出信號，C1線圈得電，C1常開觸點閉合，預(yù)警執(zhí)行機構(gòu)接通電源，發(fā)出 警報。</p> <p> </p> <p class="MsoNormal"><span style="font-size:9.0pt;font-family:宋體;mso-ascii-font-family: "Times New Roman";mso-hansi-font-family:"Times New Roman"">本文采摘自“加工中心盤式刀庫換刀系統(tǒng)的故障預(yù)警方法研究”，因為編輯困難導(dǎo)致有些函數(shù)、表格、圖片、內(nèi)容無法顯示，有需要者可以在網(wǎng)絡(luò)中查找相關(guān)文章！本文由伯特利數(shù)控整理發(fā)表文章均來自網(wǎng)絡(luò)僅供學(xué)習(xí)參考，轉(zhuǎn)載請注明！</span><span lang="EN-US" style="font-size:9.0pt"> 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