Abstract
Insights into the mechanism of reflow soldering temperature curve, a mathematical model of the temperature change of the circuit board surface is established. The heat transfer methods, heat radiation and heat convection is analyzed in detail. The curve of air temperature inside the reflow furnace is solved by establishing an one-dimensional heat conduction model and fitting coefficients. The heat radiation received by the circuit board mainly comes from the small temperature zone. Depending on the area where the circuit board is located, heat radiation is itemized into 3 types: heat radiation in the gap, the temperature zone and the adjacent temperature zone of the area before and after the furnace. The impacts of heat radiation is weighted and analyzed by relative distance. For coefficients, analyzing and fitting is further discussed.
Highlights
In the processing of electronic products like integrated circuit boards, electronic components are automatically soldered to the circuit board by heating
The reflow soldering machine is widely employed, the setting of reflow soldering temperature curve challenges us. Plenty works in this area is basically controlled and adjusted through experimental tests
The circuit board are put on conveyor belt to go through the furnace at a stable speed for heating and welding
Summary
In the processing of electronic products like integrated circuit boards, electronic components are automatically soldered to the circuit board by heating. The reflow soldering machine is widely employed, the setting of reflow soldering temperature curve challenges us. Plenty works in this area is basically controlled and adjusted through experimental tests. This thesis aims to analyze mechanism models. Four big temperature zones with varying functions , preheating zone, constant temperature zone, reflow zone, and cooling zone, consist small temperature zones[1]. The circuit board are put on conveyor belt to go through the furnace at a stable speed for heating and welding. The ideal temperature curve is like Figure2[2]
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