C8451-A17-A26產(chǎn)品說明：
C8451-A17-A26
閃光對(duì)焊作為一種先進(jìn)的焊接技術(shù)，具有無需添加焊接材料、生產(chǎn)率高、成本低、易于操作等優(yōu)點(diǎn)。隨著工業(yè)技術(shù)的不斷發(fā)展，焊接的零件截面越來越大，遇到了一些技術(shù)問題，如焊接加熱難、生產(chǎn)率低、產(chǎn)品合格率低等。為了解決閃光對(duì)焊中存在的這些問題，許多焊接工作者對(duì)閃光對(duì)焊工藝過程進(jìn)行了一系列的研究，創(chuàng)建了高效率、低能耗的閃光對(duì)焊方法，如脈沖閃光對(duì)焊法、程序降低電壓閃光對(duì)焊法?？刂崎W光對(duì)焊工藝過程，使之在保證焊接質(zhì)量的前提下盡可能提高生產(chǎn)率，是我們一直以來追求的目標(biāo)?？紤]到影響閃光對(duì)焊焊接質(zhì)量的因素，本文利用PLC系統(tǒng)來控制閃光對(duì)焊工藝過程，實(shí)現(xiàn)了對(duì)焊接質(zhì)量控制的目的，從而提高了閃光對(duì)焊的生產(chǎn)率。
機(jī)械機(jī)構(gòu)及過程分析 1.1 閃光對(duì)焊的機(jī)械裝置及動(dòng)作過程
如圖1所示為閃光對(duì)焊的機(jī)械裝置，其動(dòng)作過程分析如下： 1.1.1 預(yù)調(diào) 閃光對(duì)焊焊接工藝前期準(zhǔn)備工作，即機(jī)械機(jī)構(gòu)的調(diào)整、焊接參數(shù)的選取等。閃光對(duì)焊的主要規(guī)范參數(shù)有：調(diào)伸長度、閃光速度、閃光電流密度、頂鍛速度、頂鍛壓力、夾緊力等。 調(diào)試完成后，將工件裝卡到工作臺(tái)上。 1.1.2 夾緊與定位 按下啟動(dòng)按鈕，電磁閥PQ1、PQ2、PQ3線圈帶電，壓縮氣體經(jīng)過三大件流入夾緊氣缸1、2上氣室，壓縮氣體推動(dòng)活塞桿向下運(yùn)動(dòng)壓緊工件1、2，直到壓緊開關(guān)閉合為止。 同時(shí)從氣泵流出的氣體經(jīng)三大件進(jìn)入定位氣缸3的上氣室,推動(dòng)定位桿向上運(yùn)動(dòng)，為工件對(duì)準(zhǔn)準(zhǔn)確定位。定位結(jié)束，電圖1 閃光對(duì)焊的機(jī)械裝置磁閥PQ3線圈去電，定位桿彈回。 1.1.3 焊接 接通焊接開關(guān)，保持電磁閥PQ1、PQ2 和PQ4線圈帶電，電磁閥PQ5線圈不帶電，壓力氣體經(jīng)低壓三大件，進(jìn)入推進(jìn)氣缸4右氣室，推動(dòng)活塞桿、動(dòng)夾具帶動(dòng)工件2向工件1運(yùn)動(dòng)，直到工件1、2接觸，達(dá)到預(yù)先設(shè)定的位置，推進(jìn)開關(guān)閉合。工件1、2接觸的瞬間，即開始通電加熱。當(dāng)閃光加熱達(dá)到預(yù)定溫度時(shí)，電磁閥PQ5線圈帶電，壓縮氣體經(jīng)過高壓三大件推動(dòng)推進(jìn)氣缸、動(dòng)夾具以很大的壓力進(jìn)行快速頂鍛。隨即切斷焊接電流，并保持一段時(shí)間，使接頭冷卻、凝固。焊接時(shí)間到，斷開焊接開關(guān)，焊接過程結(jié)束。 1.1.4 復(fù)位 電磁閥PQ4、PQ5線圈去電，推進(jìn)氣缸氣路換向，低壓氣體進(jìn)入推進(jìn)氣缸4左氣室推動(dòng)推進(jìn)氣缸帶動(dòng)工作臺(tái)向右運(yùn)動(dòng)，推進(jìn)氣缸4復(fù)位。電磁閥PQ1、PQ2線圈去電，氣路換向，壓緊觸頭彈回，氣缸1、2復(fù)位。此時(shí)，一次閃光對(duì)焊焊接過程已完成，所有裝置原位等待，準(zhǔn)備進(jìn)入下一焊接循環(huán)。 1.2 閃光對(duì)焊時(shí)序分析 由于執(zhí)行機(jī)構(gòu)部件較多且各部件動(dòng)作存在時(shí)序性，故先做出工藝時(shí)序圖，便于時(shí)序分析。閃光對(duì)焊焊接過程可概括為：預(yù)調(diào)—定位—夾緊—推進(jìn)—焊接—頂鍛—保持—復(fù)位等幾個(gè)階段。
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