欧美人妻精品一区二区三区99,中文字幕日韩精品内射,精品国产综合成人亚洲区,久久香蕉国产线熟妇人妻

??? ???? ??? ??? ? ?????

?? ???? ??? ??? ?? ??????

No matter what you think of, you are not likely to think of our furniture anyway, nor will it be associated with wood. Why? Because you will feel welded wood, it is not a matter of “fueling on fire”, who makes our favorite wood most afraid of heat and fire.

??! ??? ????, ??? ???? ?? ??? ?? ?? ??? ?? ? ??? ?? ???? ??? ??? 119? ?? ??? ?? ?????.

However, the welding we are going to say today is indeed applied to the connection of wood products, but unlike the common iron welding requires the introduction of ultra-high heat sources. What is mysterious technology? Don’t worry, this article introduces you to the “round bar rotating wood welding technology.”

?? ?? ?? ?? ??? ?? ?????

??? ???! ??? ?? ??? ?? ? ?? ??? ??? ????? ????? ??? ??? ??? ????.

???? ??? ?? ?? ??? ???? ?? ??? ?????. ?? ??? ?? ??? ? ?? ???? ?? ???? ??? ??? ????. ?? ??? ???? ??? ?? ?? ?? ?? ??? ????????. ???? ???? ???? ?? ??? ?? ????? ?? ? ?? ?? ?? ?? ??? ???? ??? ????.

??? ????? ?? ?? ?? ?? ?? ??? 20 ?? ?? 21 ?? ? ???? ?? ? ??? ?????. ?? ??? ?? ?? ?? ??? ???? (??? ??? ?? ??? ???? ???). ????? ?? ?? ?? ??? ?? ? ??? ?? ? ??? ?? ?? ????? ?? ?? ?? ??? ???? ???, ???, ?? ????? ??? ?? ?? ?????.

?? ?? ?? ?? ?? ??? ??????

? ??? ???? ??? ?? ???? ??? ?? ?????. ???? ???? ?? ?? ?? ?? ??? ?? ??? ????? (2-4 ?) ?? ???? ?? ?????? ?? ?? ?? ??? ????. ?? ?? ??.

 

Focusing on the “high-speed rotation”, “friction”, “instant engagement” is undoubtedly the characteristics of the technology, but still do not understand: Why can we achieve the so-called “welding”?

??? ??? ????.

?? ??? ?? ??? ???? ?????. ??? ????? ???? ?? ? ? ????? ?? ?? ??? ?? ?? 1e ?? ??? ??? ??? ??? ??? ??????. ?? ??? ??? ???? ??? ??? (?? ??? ? ?? ???????)? ????. ?? ? ??? ?? ??? ????, ?? ?? ?? ???? ????. ?? ??? ??? ? ?? ???? ???? ?? ? ???? ???? ?? ?????.

 

It can be seen from the above figure that the microscopic welds of the welded strips are intertwined and connected. When the friction welding of the wood is completed, the “new interface” lignin and hemicellulose (furfural, xylan) are formed into a polymerization and cross-linking chemical reaction. Therefore, after the round bar stops rotating, in order to ensure a certain joint strength, it is necessary to maintain a certain instantaneous pressure.

?? ???

???? ???? ????. ?? ???? * ? ???? ????

西畴县| 乌鲁木齐市| 桐庐县| 信宜市| 西华县| 长子县| 通辽市| 来凤县| 子长县| 乌拉特前旗| 邹平县| 富顺县| 万州区| 马鞍山市| 绥中县| 新巴尔虎左旗| 常德市| 满洲里市| 临猗县| 遂川县| 龙岩市| 邛崃市| 肃北| 扶绥县| 哈尔滨市| 洪江市| 龙游县| 扶风县| 灵宝市| 汉阴县| 三明市| 微山县| 南雄市| 开远市| 六盘水市| 宽城| 平乡县| 沽源县| 和政县| 余干县| 黔西县|