丰满熟妇人妻中文字幕,国产麻豆精品一区,中国老熟女重囗味hdxx,蜜桃精品免费久久久久影院

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)量體系認證,ISO14001:2015環(huán)境管理體系認證和SGS中多項ROHS以及REACH的檢測;中國賽寶實驗室可靠性研究認定。


国产亚洲情侣一区二区无| 中文亚洲av片不卡在线观看| 国产亚洲美女精品久久久| 四十如虎的丰满熟妇啪啪| 少妇人妻在线视频| 蜜桃麻豆www久久囤产精品| 中字幕人妻一区二区三区| 国产成人无码a区在线观看导航| 欧美亚洲色综久久精品国产| 久久亚洲私人国产精品| 国产成+人+综合+亚洲 欧美| 看成年全黄大色黄大片| 亚洲国产区男人本色| 揄拍成人国产精品视频| 国产成a人亚洲精品无码樱花| 人妻丰满熟妇av无码区| 激情影院内射美女| 无码人妻丰满熟妇区五十路百度| 久久无码av三级| 亚洲欧洲无码一区二区三区 | 国产精品久久久久久一区二区三区| 午夜精品久久久久久久99热 | 久久午夜无码鲁丝片直播午夜精品 | 亚洲欧美综合区丁香五月小说| 亚洲午夜精品久久久久久app| 欧美性大战xxxxx久久久| 看成年全黄大色黄大片| 亚洲美女又黄又爽在线观看| 正在播放国产多p交换视频| 久久久久亚洲av无码专区体验| 福利100合集 在线播放| 亚洲国产精品无码成人片久久| 国内大量揄拍人妻精品視頻| 久久久久久久久无码精品亚洲日韩| 中文精品无码中文字幕无码专区| av无码国产精品色午夜| 狼人无码精华av午夜精品| 五月色婷婷丁香无码三级| 超薄丝袜足j好爽在线观看 | 精品乱人伦一区二区三区| 午夜性刺激免费看视频|