电烙铁简介和使用技巧（Brief introduction and using skill of electric iron）.docVIP

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电烙铁简介和使用技巧（Brief introduction and using skill of electric iron）.doc

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电烙铁简介和使用技巧（Brief introduction and using skill of electric iron）

电烙铁简介和使用技巧（Brief introduction and using skill of electric iron） Brief introduction and using skill of electric iron Brief introduction and using skill of electric iron I. brief introduction of electric iron 1 、 external heating type electric iron The utility model is composed of a soldering iron head, a soldering iron core, an outer shell, a handle, a plug and other parts. The iron head is arranged in the iron core, and is made of copper alloy material which is made of copper material with good heat conductivity. The length of the iron head can be adjusted (iron head shorter, the tip temperature is higher), and a chisel type, cone shape, round shape, round, cone shaped and semicircle groove shape in different shapes, in order to adapt to the different needs of the welding surface. 2 、 internal heating type electric iron The utility model is composed of five parts of a connecting rod, a handle, a spring clamp, a soldering iron core and a soldering iron head. The iron core is installed in the inside of the iron head (fast heating, high thermal efficiency up to 85% ~ 96% or more). The iron core is made of the nickel chromium resistor wire around the porcelain tube. The general 20W electric iron has a resistance of about 2.4k ohms, and the resistance of the 35W electric iron is about 1.6K ohms. The working temperature of commonly used internal heating electric irons is listed below: Power of iron (W) 20254575100 End temperature (DEG) 350400420440455 Generally speaking, the greater the power of the electric iron, the greater the heat, the higher the temperature of the iron head. Welding integrated circuit, printed circuit board and CMOS circuit generally use 20W internal heating type electric iron. Excessive iron power use, easy to burn the components (two, transistor junction temperature exceeding 200 DEG C when it will burn out) and the printed conductors detached from the substrate; the use of the power of the iron is too small, can not fully melted solder, flux can n