人伦人与牲囗恔配视频_国产精品爽爽久久久天天躁水果派_与子敌伦刺激对白播放_丁香花高清在线观看完整 剧情_巜被蹂躏的奶水2在线播放_日韩经典午夜福利发布_182tv免费视频在线观看_51亚洲精品午夜无码专区_麻豆国产尤物av尤物在线观看

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: [email protected]
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(xiàng)ROHS以及REACH的檢測;中國賽寶實(shí)驗(yàn)室可靠性研究認(rèn)定。


大陆女明星裸体1970av| china xxxx hd| 久久精品区| 三上悠亚教室高无删减版在线观看| 国产日本亚洲香蕉视频| 美女的隐私视频网站| xnxx free porn| 日本欧美肥老太交大片| 将军边走边挺进公主h| 国产精品视频xxx| 老师警花护士少妇h系列小说| 婷婷精品国产欧美精品亚洲人人爽| 明星大尺度激情做爰视频| 久久在线视频精品| 闺蜜趁我睡觉用震蛋折磨我| free性朝鲜娇小videos| 香蕉视频污片| 浓雾与海盐之礁全文免费阅读| 汤加丽裸体大乳照片| 老娘舅和他的儿孙们| 女人内精69xxxxx免费软件| 嗯啊h客厅hh青梅h失禁| 新婚性生殖视频| 我被两个男人玩高潮了小说| 日本动漫xxxxxxxx19| 玖玖热| 被绑在床强做调教小淫b呻吟h文| 吃女人奶水电影在线| 欧美巨大黑人极品精男| 光pp脱裤子趴下打屁屁屁屁股| 小说大尺度| 金瓶狂野欧美性猛交xxxx| 人人插人人澡| 无遮挡男人女人做爰| 欧美性大战久久久久久久蜜臀| 国产尤物精品福利视频尤果网| 涩涩网站在线| 乱爱性全过程| 女帝张开腿疯狂娇吟h| 艳母免费动漫| 成人av亚洲|