IC660BBA025
IC660BBA025
IC660BBA025
IC660BBA025
上料臺車將金屬卷材送至開卷機上。板材由開卷機引出，經(jīng)過展平機初步整平，送入修邊機實施板材縱剪，按工藝要求完成板材寬度的加工。校平機由15根校平輥（七上八下）和一對牽引輥組成，它也是這條生產(chǎn)線的主牽引機。經(jīng)過校平機后，平整的板材經(jīng)緩沖坑，然后，由定尺送進按一定的板材長度定量送入剪扳，機實施板材剪切。皮帶機將加工完好的合格板材輸送到堆料小車上。兩臺碎邊機安裝在修邊機后，分別將縱剪下來的兩條下腳料破碎，以便運輸存儲。為了提高生產(chǎn)效率，加快剪切速度，本生產(chǎn)線上的橫剪刀采用液壓馬達驅(qū)動。
由本生產(chǎn)線的工藝流程可以看出：開卷、展平、修邊、碎邊和校平應(yīng)在一個線速度V1下同步運行。定尺送進和皮帶之間設(shè)有橫剪刀，因此，定尺送進、皮帶和橫剪刀是斷續(xù)運行，同時，它的運行速度V2應(yīng)大于V1。在校平機與定尺送進機之間的緩沖坑，其作用是：平衡V1和V2之間的速度關(guān)系，保證生產(chǎn)線的穩(wěn)定運行。
三、電氣控制方案：
展平、修邊、碎邊和校平的運行速度容易實現(xiàn)同步，只要將電機的旋轉(zhuǎn)速度按照自身的減速器、傳動輥子等的機械參數(shù)折算成線速度，與生產(chǎn)線的線速度V1統(tǒng)一即可。
在開卷工作中，由于卷徑是在不斷變化的，開卷電機的旋轉(zhuǎn)速度與生產(chǎn)線的線速度V1很難找到匹配關(guān)系。換句話說，如何解決開卷機與整條生產(chǎn)線的運行速度V1同步的問題，是電氣設(shè)計的主要工作之一。 定尺送進、橫剪刀和皮帶是斷續(xù)運行。板材由定尺送進機的牽引輥按照加工要求的長度送入剪扳，機進行橫向剪切。因此，定尺送進機是生產(chǎn)線的位置控制精度要求最高的設(shè)備。
目前，開卷機的控制有以下幾種方案：
①、 電磁滑差調(diào)速：手動調(diào)節(jié)開卷機的轉(zhuǎn)速，使之與生產(chǎn)線的線速度一致。
②、 張力控制：利用板材表面張力恒定的原理，使之自動跟隨生產(chǎn)線的線速度。
張力控制的實施又分為：力矩電機、直流電機、張力控制器等。
方案①的優(yōu)點：電氣控制簡單，造價低廉。缺點：控制方式陳舊，勞動量大，效率低，耗能高，無法實現(xiàn)生產(chǎn)線的自動運行。
方案②的優(yōu)點：操作簡單，自動化程度高。缺點：控制復雜，造價高昂。
我們經(jīng)過調(diào)研，決定采用艾默生TD3300張力控制交流變頻器，使開卷機在張力的控制下，自動跟隨生產(chǎn)線的線速度。在自動化程度不降低的前提下，大大降低了開卷生產(chǎn)線的制造成本，提高了性能價格比。
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