国产精品福利一区二区,精品国产免费人成电影在线看,久久精品亚洲国产,激情综合色综合啪啪五月丁香,中文毛片无遮挡高潮免费,成在人线AV无码免费高潮喷水,黄A无码片内射无码视频,无码视频一区二区三区,成AV免费大片黄在线观看,丁香色婷婷国产精品视频

      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(zhuān)業(yè)生產(chǎn)焊錫膏、焊錫線(xiàn)、焊錫條的公司,擁有自己的科研部門(mén),專(zhuān)業(yè)生產(chǎn)、銷(xiāo)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(guò)了ISO9001:2015國(guó)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(cè);中國(guó)賽寶實(shí)驗(yàn)室可靠性研究認(rèn)定。


      亚洲AV无码一区二区下载 | 国产成人精品久久亚洲高清不卡| 亚洲 欧美 变态 另类 综合| 久久久久人妻一区二区三区| 精品少妇人妻av无码久久| 亚洲成在人线av| 中国鲜肉gay高中xx禁18网站| 粗大黑人巨精大战欧美成人| 国产精品无码av天天爽| 天天躁夜夜躁天干天干2020| 99久久99久久精品国产片| 亚洲性色av私人影院无码| 亚洲乱妇老熟女爽到高潮的片| 少妇人妻好深太紧了| 久久国产色av免费观看| 精品久久久久久中文字幕大豆网| 粗大猛烈进出高潮视频| 中文字幕人妻被公上司喝醉| 一本大道道无香蕉综合在线| 综合在线视频精品专区| 无码久久免费视频| 免费三级网站| 无码精品在线观看| 久久久久久久精品免费老鸭窝| 国产H视频在线观看| 色一情一乱一伦麻豆| A级无遮挡超级高清-在线观看 | 亚洲欧洲日产国码无码久久99| 色欲综合久久中文字幕网| 享受不戴套的人妻| 亚洲av日韩专区在线观看| 国产精品亚洲а∨天堂2021| 四虎成人精品国产永久免费无码| 少妇人妻无码精品视频| 强行交换配乱婬bd| 熟妇高潮喷沈阳45熟妇高潮喷| 亚洲欧美日韩在线播放| 综合激情婷婷| 又大又粗又又爽a毛片| 亚洲2020天天堂在线观看| 久久精品人人做人人综合|