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Wave soldering welding interview direct contact with high temperature liquid in the production

The design of wave soldering roughly elements are inserted in the corresponding component hole ?

precoated flux preheat (90 to 100 ° C temperature, length 1-1.2m) ? (220-240 ?) wave soldering cooling ? removal of excess plugfeet ? check. And wave soldering materials, mechanical and electrical connection between the surface mount components weld ends or pins and printed circuit board pad soldering. Wave soldering [1] As people's awareness of environmental protection has been a new welding process. Previous tin-lead alloy, but the lead is a heavy metal great harm to the human body. So now have a generation of lead-free processes. It uses a higher preheat temperature * tin-silver-copper alloy * and special flux and soldering temperature requirements, but also to say that, over the welding area on the PCB board to set up a cooling zone workstations to to prevent thermal shock, on the other hand, if there are ICT, if interested in detecting influential.

Wave soldering machine welding assembly material:

a lead-free wave soldering machine PCB manufacturing process;

b in the solder paste the application of 96.5Sn/3.5Ag and 95.5Sn/4.0Ag/0.5Cu eutectic and approximate eutectic alloy system;

for wave soldering applications 99.3Sn/0.7Cu eutectic alloy system;

for manual welding 99.3Sn/0.7Cu alloy system.


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