焊接电路板技巧（Welding circuit board skills）.doc

焊接电路板技巧（Welding circuit board skills） A bit of experience with manual soldering of circuit boards. 2007-03-11 20:53 noun explanation: electric iron: one of the main tools used in manual welding. Flux: Rosin melts in alcohol (1:3) to form pine perfume, also known as soldering flux. A: the right to use electric iron, 1 iron tin before use, the specific method is: the electric iron heat, stay just melts the solder, coated with flux (rosin), and then evenly coated on the soldering iron tip, the iron head even eat on a layer of tin (bright thin you can). 2, in the ordinary welding (such as welding in the universal board welding components), hand iron, hand soldering wire, close to the root, both sides gently touched, a solder joint formed. The ideal shape of the solder joint is a piece of shit. 3, in the universal board welding straight in component, want to pin as far as possible inserted in the end. 4, welding time should not be too long, otherwise it is easy to burn components, if necessary, tweezers can be clamped in the foot to help dissipate heat. 5. After welding, clean the residual flux on the circuit board with alcohol in order to prevent the flux from carbonization from affecting the normal operation of the circuit. 4. The electric iron should be placed on the iron rack. Two: component welding order first difficult, easy, first low, later high, first patch, plug later. Aim: convenient welding and time saving. First welding difficult, this is mainly refers to the pin tight chip integrated chip. If these are difficult to put in the final welding, the welding pad once failed to break, it will come to naught. First low, later high, first patch, plug later. Its easy to weld. If the high element is welded first, it may interfere with the welding of other components, especially when the large components are crowded. If welding components are inserted first, the circuit board will be placed on the welding platform, which will affect the welding mood. Three: manual weld