电路焊制（Circuit welding）.doc

电路焊制（Circuit welding） Circuit board welding techniques and precautions (original) 2008-09-17 17:34 Chat with friends, discussed the welding problem, I think someone may encounter the same problem, so after finishing up, with a view to help. Notes on welding essentials: Flux: there are usually two kinds, liquid and solid. Mixture of liquid with alcohol and other things for the direct use of rosin, rosin solid good ^_^ If you have to buy a liquid containing flux bottles, bottles special buy, because the bottle will be lost, that is the decomposition (usually need 15-20 yuan, personal feel than the expensive bottles, hey, but it is not a bottle!). Youd better have two. Because of rust (rosin on welding torch head), flux I would, because welding small device certainly need that the bottle. Soldering flux function: 1, when you are soldering the device, only soldering tin is not good, the welding can not go up, there is soldering flux, you will be convenient a lot, can let solder paste the darling to go up. 2, in fact, the main major function is that you sometimes solder a lot of tin, the solder will help you grab tin, grab tin means to get rid of excess tin, otherwise the components of the pin will stick together. (see below for specific ways to grab tin; specific methods of flux usage will be described in detail below) Welding torch: the main tool for welding. The one bought in our laboratory is more than 50 pieces on average. The Japanese product (label says made in China) I forgot the sign. Soldering stand: that is, a metal base for the welding torch. The base can relax. Hot air gun: This is the tool used to help you blow down the soldered device when you solder it. Welding fault refers to: no floor with pin alignment; chip, diode and other anti welding devices (mainly for chip welding anti) etc., if there are omissions please, but stressed the point is not using a hot-air gun frequent blow, it will cause the deformation of the circuit board, may cause the board the w