Selective wave soldering method and system for PCB repair

Abstract

The invention discloses a selective wave soldering method and system for PCB repair. The method comprises the following steps: firstly, carrying out the welding spot detection of a to-be-processed PCBthrough an optical detection system, so as to obtain the bad welding spot information of the PCB; then, according to the bad welding spot information, for a welding spot capable of being repaired bya machine, performing welding and maintaining on the welding spot by a welding mechanism according to a welding spot coordinate; for the welding spots which cannot be repaired by the machine, markingthe welding spot by a marking mechanism according to a welding spot to form identification marks; then, detecting the PCB again through an optical detection system, and outputting bad welding spot information again; and finally, marking the welding spots which fail to be maintained through the marking mechanism. According to the selective wave soldering method and system, the PCB is maintained, automatic detection of the selective wave soldering repairing effect is achieved, misjudgment and missed judgment are avoided, the product percent of pass is increased, and the time for searching for welding spots which cannot be repaired by a machine again during manual maintenance can be saved.

Description

technical field [0001] The invention relates to the technical field of selective wave soldering, in particular to a selective wave soldering method and system for PCB board repair. Background technique [0002] Excellent nozzle design in the selective wave soldering process allows soldering parameters to correspond to defined solder joints without subjecting the entire assembly to unnecessary thermal stress, which essentially eliminates the risk of damaging surface mount devices. In view of the precision soldering process of selective wave soldering, generally selective wave soldering is used in the welding of precision instruments and equipment, as well as in the repair of PCBs. [0003] In the use of selective wave soldering for PCB board repair, AOI testing equipment is generally equipped. The AOI testing equipment is used to detect the coordinates of bad solder joints on the PCB. Selectively repair the bad solder joints on the PCB. Nowadays, after using selective wave ...

AI Technical Summary

Problems solved by technology

Nowadays, after using selective wave soldering to repair PCB boards, it is still necessary to manually judge whether all repairs are successful (because if there are solder joints that cannot be repaired by machines, manual repairs are required), which is not only time-consuming and laborious, but also easily leads to misjudgments and missed judgments.

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