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德國科學(xué)家研制直角轉(zhuǎn)彎玻璃制造新工藝  （圖自：Fraunhofer，via New Atlas） 盡管此前已有加熱玻璃，使之彎曲到一定程度的工藝，但仍難以達(dá)成非常尖銳的角度。 此外，傳統(tǒng)工藝涉及將整片材料加熱到足夠柔軟和可延展的程度，使得在烤箱中與支撐件接觸的玻璃點(diǎn)位容易變形。 為克服這些限制，夫瑯和費(fèi)材料力學(xué)研究所的研究人員們設(shè)計了一套新技術(shù)。 其首先將玻璃平板預(yù)加熱至約 500 ℃（932 ℉），讓玻璃正好處在可延展的“轉(zhuǎn)變點(diǎn)”之下，因素烤箱中的支撐架不會導(dǎo)致產(chǎn)生任何的形變。  然后，其借助鏡面引導(dǎo)的激光來加熱玻璃。激光只會沿著玻璃板中間的一條直線來加熱（相應(yīng)變軟），其余部分則仍保持在 500 ℃ 。 隨后，當(dāng)將支撐件從玻璃窗格的一側(cè)移開時，重力會導(dǎo)致平板玻璃沿線直線軟化彎曲，形成一個自然的 90° 角。冷卻之后，玻璃又會重新變得堅硬。 截至目前，科學(xué)家已借助現(xiàn)有設(shè)備，在實(shí)驗(yàn)室中達(dá)成了最大面積為 1 平方米（10.8 平方英尺）的窗格。不過他們正在尋求商業(yè)合作伙伴，以達(dá)成更大的加工面積。 展望未來，這項(xiàng)工藝及其產(chǎn)品不僅能夠在建筑中得到應(yīng)用，還可在醫(yī)學(xué)等領(lǐng)域發(fā)揮作用，比如制造能夠抵抗細(xì)菌繁殖的無間隙玻璃表面。 相關(guān)鏈接：https://newatlas.com/materials/glass-bending-fraunhofer/ |
最新評論
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mang2004 2019-10-05 23:10利用激光加熱和自重
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巧克力 2019-10-06 00:03強(qiáng)，玻璃加工技術(shù)的新突破
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mam07 2019-10-06 00:15可以用在手機(jī)上
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mam07 2019-10-06 00:16挺好的是吧
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redplum 2019-10-06 00:28真是技術(shù)創(chuàng)新
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likaihit 2019-10-06 00:28有意思啊
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dushunli 2019-10-06 00:34玻璃新工藝 !
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bairuizheng 2019-10-06 01:24還能這么去想！
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lufan 2019-10-06 01:45直角轉(zhuǎn)彎玻璃制造新工藝
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mang2004 2019-10-06 03:46German tech bends glass sheets at right angles
Ordinarily, if a window goes around the corner of a building, it's made of two flat panes of glass that are joined together by a metal rail or glue. Now, though, German scientists have developed a method of bending a single sheet of glass to a 90-degree angle – without affecting its optical properties.
Although panes of glass can already be heated and then bent to a certain extent, very sharp angles have reportedly not been previously possible. Additionally, because the usual process involves heating the entire sheet to the point that it becomes soft and malleable, deformations can form at the points where the glass is supported in the oven.
In order to get around those limitations, researchers from the Fraunhofer Institute for Mechanics of Materials devised a technique which begins with a flat pane of glass being placed in an oven that's preheated to about 500 ºC (932 ºF). This is just below the "transition point" at which glass becomes malleable, so the oven's supports don't produce any deformations.
A mirror-guided laser is then used to heat the glass a little bit more, but only along a straight line going down the middle of the sheet – the rest of the pane stays at 500 degrees. As a result, the glass becomes soft only along that one line. When the supports are subsequently removed from beneath one side of the pane, gravity causes the sheet to bend along the softened line, naturally going to a 90-degree angle. Once the bent glass cools, it becomes entirely rigid again.
Utilizing their current lab equipment, the scientists have so far been limited to panes measuring a maximum of one square meter (10.8 sq ft). They are therefore looking for industrial partners who may be interested in commercializing the technology for use with larger sheets.
It is hoped that the glass-bending system may ultimately find applications not only in architecture, but also in fields such as medicine, where it could be used to produce gap-free glass surfaces that are resistant to colonization by germs.