帖子
勋章
关注
任务
德国科学家研制直角转弯玻璃制造新工艺  （图自：Fraunhofer，via New Atlas） 尽管此前已有加热玻璃，使之弯曲到一定程度的工艺，但仍难以达成非常尖锐的角度。 此外，传统工艺涉及将整片材料加热到足够柔软和可延展的程度，使得在烤箱中与支撑件接触的玻璃点位容易变形。 为克服这些限制，夫琅和费材料力学研究所的研究人员们设计了一套新技术。 其首先将玻璃平板预加热至约 500 ℃（932 ℉），让玻璃正好处在可延展的“转变点”之下，因素烤箱中的支撑架不会导致产生任何的形变。  然后，其借助镜面引导的激光来加热玻璃。激光只会沿着玻璃板中间的一条直线来加热（相应变软），其余部分则仍保持在 500 ℃ 。 随后，当将支撑件从玻璃窗格的一侧移开时，重力会导致平板玻璃沿线直线软化弯曲，形成一个自然的 90° 角。冷却之后，玻璃又会重新变得坚硬。 截至目前，科学家已借助现有设备，在实验室中达成了最大面积为 1 平方米（10.8 平方英尺）的窗格。不过他们正在寻求商业合作伙伴，以达成更大的加工面积。 展望未来，这项工艺及其产品不仅能够在建筑中得到应用，还可在医学等领域发挥作用，比如制造能够抵抗细菌繁殖的无间隙玻璃表面。 相关链接：https://newatlas.com/materials/glass-bending-fraunhofer/ 分享到：
|
最新评论
-
mang2004 2019-10-05 23:10利用激光加热和自重
-
巧克力 2019-10-06 00:03强，玻璃加工技术的新突破
-
mam07 2019-10-06 00:15可以用在手机上
-
mam07 2019-10-06 00:16挺好的是吧
-
redplum 2019-10-06 00:28真是技术创新
-
likaihit 2019-10-06 00:28有意思啊
-
dushunli 2019-10-06 00:34玻璃新工艺 !
-
bairuizheng 2019-10-06 01:24还能这么去想！
-
lufan 2019-10-06 01:45直角转弯玻璃制造新工艺
-
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.