插座改进报告connector-improvement-report.ppt

NOTE NUMBER：TB-7527-01-1VERSION：V-0 One、Originmachinery update solve soldering quality problems in our factory，put to us dual wave crest take the place of old single wave crest.all kinds of connector stitch happen fall connector number：（2-15PIN） component supplier：most supplier product model： PA66 material in connector types for all model Bad picture： Two、dual wave soldering machine instead of single objective Product function increase， SMD or SMT for development，make use of material have high-priced thickness or small size to package, bring about wave crest problems for solder. Three 、 dual wave soldering machine instead of single difference and characteristics 1.single wave soldering It is with the help of tin pump molten solder continuous vertical towards the narrow export emission, forming 10 ~ 40mm high wave Peak.So the solder to speed and a certain pressure to PCB, fully penetrate into the feet of the element to be welded with PCB Between the plates, so completely wet and welding.It compared with dip, can significantly reduce the rate of leakage welding.Due to welding The crest of the flexible material, even if the PCB is not flat, as long as the warp degree below 3%, can obtain good welding quality The amount of.The single wave soldering defect is peak vertical force, will give some lighter components impact, cause floating or weld.Because the equipment is cheap, mature technology in the domestic general perforation cartridge components (THD) welding has been widely Use. 2 .dual wave soldering Due to mounting SMD patch device without THD in-line devices that,助焊剂/flux after heated volatile out without,In addition, SMD patch at the shed, devices have a certain height and width, and high density mount, and solder surface tension Force, thus the solder is hard to be moist permeate every corner of mount components, so if the single wave soldering,there will be leakage solder bridge and large and even, must adopt dual wave soldering can so