焊锡需要的技巧和方法（Soldering skills and methods required）.docVIP

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焊锡需要的技巧和方法（Soldering skills and methods required）.doc

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焊锡需要的技巧和方法（Soldering skills and methods required） Through the automatic soldering machine theory, we can lead to the following methods of soldering points, and proved by practical experience It has universal applicability. 1., grasp the heating time (here, the principle of automatic soldering machine in regulating procedures, said the set of pre heating) The soldering time ) can be used for different heating rates, such as the iron head shape bad, with small iron welding For large weldments, we have to extend the time to meet the requirements of the solder temperature. Extended in most cases Heating time is harmful to the assembly of electronic products, because The bonding layer of a and solder joint exceeds the proper thickness due to long time heating, resulting in deterioration of solder joint performance. B, printed boards, plastics and other materials too much heat will be deformed. C, components after heating, performance changes or even failure. D and solder joint surface lose protection and oxidation because of flux volatilization. Conclusion: the shorter the time is, the better to ensure the solder wetted solder. 2. maintain the proper temperature (the principle here is the temperature that the automatic soldering machine controls when soldering In order to shorten the heating time and use high temperature iron welding spot welding, it will bring another question Title: solder wire in the flux is not enough time in the flow on the welding surface of premature volatilization solder failure; Melting speed is too high, affecting the role of the role of play; because the temperature is too high, although the heating time is short, but also cause overheating Phenomenon. Conclusion: keep the iron head in a reasonable range of temperature. General experience is that the soldering iron temperature is better than the solder Melting temperature of 50 degrees is more appropriate. The ideal state is to shorten the heating time at lower temperatures, though This is con