美女又色又爽视频免费,成人片黄网站色大片免费观看cn,国产99视频精品免视看9,国产一线二线三线女,日躁夜躁狠狠躁2001,精品国内自产拍在线观看,一二三四在线视频观看社区,女女女女bbbbbb毛片在线,国产无人区码一码二码三mba,8ⅹ8x擦拨擦拨成人免费视频

Welcome to the official website of Legret Metal Company
Focus on electronic welding for 20 yearsDONGGUAN LEGRET METAL.,LTD
National consultation hotline:135-2799-2739
Contact US
mobile phone: 135-2799-2739
Service hotline: 0769-38893080
Email: lzd@dglzd.com
Address: Dongguan lvzhidao Metal Co., Ltd
Contact person: Manager Zeng
Industry information

What is reflow soldering commonly used in solder field?

作者:綠志島焊錫廠 2021-03-12 0

Reflow soldering, foreign name 回流焊, reflow soldering technology is no stranger in the field of electronic manufacturing. The components on various hardware boards used in our computer are welded to the circuit board by reflow soldering.


Reflow soldering is to weld the components to the PCB board and mount the components on the surface. The reason why it is called "reflow welding" is that the gas circulates in the welding furnace to produce high temperature, so as to achieve the purpose of welding.


There is a heating circuit inside the reflow soldering furnace, which heats the air or nitrogen to a certain temperature and then blows it to the circuit board which has been attached with components. Depending on the effect of hot air flow on the solder joint, the colloidal flux carries out physical reaction under a certain high temperature air flow to achieve SMD welding; The welding material on both sides of the component melts and connects with the motherboard.


The advantage of this welding technology is that the temperature is easy to control, the excessive oxidation can be avoided in the welding process, the variable is small, and the manufacturing cost is easier to control;


The quality of reflow soldering will be affected by many factors, the most important factor is the temperature curve of reflow soldering furnace and the composition of solder paste in the process of electronic processing.


Now the high performance reflow soldering furnace which is often used can adjust and control the temperature curve more conveniently; Therefore, in the trend of miniaturization and high density, solder paste printing has become the key factor of reflow soldering quality, template, printing and solder paste can affect the quality of solder paste printing.



綠志島金屬有限公司是一家專業(yè)生產(chǎn)焊錫膏、焊錫線、焊錫條的公司,擁有自己的科研部門,專業(yè)生產(chǎn)、銷售電子焊接使用的金屬材料、電鍍錫制品、電子化學(xué)品等。

公司通過了ISO9001:2015國際質(zhì)量體系認(rèn)證,ISO14001:2015環(huán)境管理體系認(rèn)證和SGS中多項ROHS以及REACH的檢測;中國賽寶實驗室可靠性研究認(rèn)定。


国产精品成人99一区无码| 黄页免费人成网址大全| 亚洲大胆视频在线观看| 日本精品人妻一区二区| 日本超级老熟女影音播放| 婷婷色婷婷开心五月四| 国产公开免费人成视频| 把女邻居弄到潮喷的性经历| 天天爽夜夜爽夜夜爽| 巨熟乳波霸若妻在线播放| 无码人妻专区一区二区三区| 亚洲国产精品色婷婷久久| 亚洲第一大av在线综合| 偷拍一区二区盗摄视频| 久久99精品久久久久久琪琪| 狠狠精品久久久无码中文字幕 | 亚洲国产精品国自产拍av| 日本牲交大片免费观看| 亚洲欧美综合在线天堂| 亚洲在战AV极品无码| 亚洲国内精品一区二区在线| 手机在线免费观看av不卡网站 | 三级全黄的视频在线观看| 欧美aaaaaa级午夜福利视频| 久久免费看少妇高潮v片特黄| 久久精品国产亚洲片| 亚洲人妻精品一区二区三区| 国产精品狼人久久影院软件介绍| 深夜放纵内射少妇| 天下第二社区在线视频| 天堂√中文在线bt| 欧美亚洲另类 丝袜综合网| 中文字幕日本五十路熟女| 三级日韩视频在线观看| 无码无套少妇毛多18p| 日产无人区一线二线三线乱码蘑菇| 欧美国产成人精品一区二区三区| 91色婷婷成人精品亚洲| 在线亚洲妇色中文色综合| 白浆国产精品一区二区| 欧美综合天天夜夜久久|