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鋼化爐輥道精度引起的鋼化玻璃彎曲的解決方法
來源:www.szkingly.com 發(fā)布時間:2013-05-30



      目前絕大部分鋼化玻璃是采用水平鋼化爐技術(shù)生產(chǎn)制造的,水平鋼化爐技術(shù)生產(chǎn)的鋼化玻璃在玻璃平整度的方面雖然比垂直吊掛生產(chǎn)方法生產(chǎn)的鋼化玻璃在平整度方面有了很大的改善,一方面沒有了吊掛部位的夾鉗印,另一方面玻璃在石英輥道上運(yùn)動就象被放在一個模具上一樣在很大程度上限制了軟化玻璃的變形,但是,水平鋼化玻璃的變形仍然是影響鋼化玻璃質(zhì)量的重要因素。鋼化爐輥道存在問題引起的鋼化玻璃平整度不良的原因分析如下:

鋼化爐     鋼化爐輥道,鋼化爐
1、鋼化爐加熱輥道變形

    通常,水平式鋼化爐的輥道是由熔融石英或陶瓷材料制成的,其具有很好的耐熱沖擊性和熱穩(wěn)定性,但由于有時其內(nèi)部結(jié)構(gòu)的不均勻性可能導(dǎo)致在加熱時特別是高溫下產(chǎn)生熱變形。輥道的熱變形必然引起輥道的彎曲,也必然引起在其表面運(yùn)動的玻璃產(chǎn)生變形。

2、鋼化爐輥道被磨損

    鋼化爐輥道經(jīng)過長時間地使用和反復(fù)的清理,必然導(dǎo)致輥道的磨損,特別是在清理輥道上粘接的比較牢固的雜質(zhì)時,通常都使用打磨的方法進(jìn)行清理,長期的使用和多次的清理會導(dǎo)致輥道磨失不均,一方面在同一輥道上出現(xiàn)粗細(xì)不均或出現(xiàn)偏心,另一方面輥道與輥道之間有時由于不同時更換卻同時使用,粗細(xì)不均的新舊輥道或磨損程度不同的輥道同時使用也會導(dǎo)致輥道粗細(xì)不均。以上結(jié)果的出現(xiàn)將導(dǎo)致鋼化爐輥道運(yùn)行表面的不平,玻璃在這種不平的輥道上最終被加熱到軟化溫度并在不平的輥道上進(jìn)行傳動,軟化的玻璃肯定會出現(xiàn)變形,玻璃這種變形保留到玻璃被增強(qiáng)以后會使鋼化后的玻璃產(chǎn)生變形。

3、鋼化爐風(fēng)柵輥道變形

    玻璃在加熱爐加熱后迅速被傳遞到風(fēng)柵輥道上,此時玻璃仍處于軟化狀態(tài),風(fēng)柵輥道如果變形必然影響玻璃的平整度,而最容易使風(fēng)柵輥道變形的原因主要有兩種:一是傳動輥道彎曲,二是輥道表面的隔熱材料缺損 。

針對鋼化爐加熱輥道變形的對策:

      在玻璃鋼化前讓輥道有足夠的時間預(yù)熱,使得輥道受熱均勻,消除應(yīng)力,減少輥?zhàn)拥膽?yīng)力變形。針對輥道磨損,在清理輥?zhàn)訒r需打磨整個輥?zhàn)?,盡量避免打磨輥?zhàn)拥木植?,使輥?zhàn)幽p均勻,保持輥?zhàn)拥囊恢滦?。并且時常檢查調(diào)整鋼化爐輥道的高度,使輥道在運(yùn)行時上表面為一個平面,以保持玻璃表面的平整。風(fēng)柵輥道的結(jié)構(gòu)是在金屬輥道表面纏繞尼龍繩作為隔熱材料,玻璃在風(fēng)柵里炸裂容易將尼龍繩割斷,造成輥道表面不平,要及時檢修,更換尼龍繩。


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