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  • 线路板焊接有哪些方法?
  • 本站编辑:杭州喜锦电子科技有限公司发布日期:2018-05-29 10:22 浏览次数:

OEM代工04

焊接方法
welding method
1、电路板焊在焊接之前先在焊盘上涂上助焊剂,用烙铁处理一遍,以免焊盘镀锡不良或被氧化,造成不好焊,芯片则一般不需处理。
1. Before the circuit board welding, the welding agent is applied to the plate before welding. It is treated with the soldering iron to avoid the bad or oxidation of the tin plate. The chip is generally not treated.
2、用镊子小心地将PQFP芯片放到PCB板上,注意不要损坏引脚。使其与焊盘对齐,要保证芯片的放置方向正确。把烙铁的温度调到300多摄氏度,将烙铁头尖沾上少量的焊锡,用工具向下按住已对准位置的芯片,在两个对角位置的引脚上加少量的焊剂,仍然向下按住芯片,焊接两个对角位置上的引脚,使芯片固定而不能移动。在焊完对角后重新检查芯片的位置是否对准。如有必要可进行调整或拆除并重新在PCB板上对准位置。
2, use tweezers to carefully place the PQFP chip on the PCB board. Be careful not to damage the pin. Make it aligned with the pad to ensure that the chip is placed in the right direction. The temperature of the soldering iron is adjusted to more than 300 degrees Celsius, a small amount of soldering tin is attached to the tip of the soldering iron. The chip is pressed down by the tool and a small amount of flux is added to the pins of the two diagonal positions. The chip is still pressed down and the pins on the two diagonal positions are welded to make the core fixed and not move. After checking the diagonal angle, re check the position of the chip. If necessary, it can be adjusted or removed and re positioned on the PCB board.
3、开始焊接所有的引脚时,应在烙铁尖上加上焊锡,将所有的引脚涂上焊剂使引脚保持湿润。用烙铁尖接触芯片每个引脚的末端,直到看见焊锡流入引脚。在焊接时要保持烙铁尖与被焊引脚并行,防止因焊锡过量发生搭接。
3. When you start welding all the pins, solder solder should be added to the iron tips, and all the pins will be coated with flux to keep the pins moist. Contact the end of each pin with the tip of the soldering iron until the solder is inflow into the pin. When welding, keep the soldering iron tip parallel to the welding pin to prevent overlap due to excessive solder.
4、焊完所有的引脚后,用焊剂浸湿所有引脚以便清洗焊锡。在需要的地方吸掉多余的焊锡,以消除任何短路和搭接。最后用镊子检查是否有虚焊,检查完成后,从电路板上清除焊剂,将硬毛刷浸上酒精沿引脚方向仔细擦拭,直到焊剂消失为止。
4. After welding all the pins, wet all pins with flux to clean solder. Remove excess solder to remove any short circuiting and lap joints wherever needed. Finally, use the tweezers to check whether there is any welding. After the inspection is completed, remove the flux from the circuit board, soak the hard brush on the alcohol and wipe it in the direction of the pin until the flux is lost.
5、贴片阻容元件则相对容易焊一些,可以先在一个焊点上点上锡,然后放上元件的一头,用镊子夹住元件,焊上一头之后,再看看是否放正了;如果已放正,就再焊上另外一头。要真正掌握焊接技巧需要大量的实践。
5, the patch resistance element is relatively easy to weld some. You can spot tin on a solder joint first, then put one on the element, clamp the element with tweezers, and then see if it is correct. If you have put it right, then weld another head. It takes a lot of practice to really master welding skills.

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