| 摘要 |
PURPOSE: A method for controlling combination reflow of tin plating process is provided to suppress variation of target temperature and prevent excess or deficiency of alloy amount and surface defects generated within the section by compensating shortage of input wattage of conductor roller for a certain section after operating from an induction heater. CONSTITUTION: The method is characterized in that the power shortage is actively compensation controlled in an induction heater(5) by operating changing time point of input wattage and electric power shortage of conduction heater between conductor rollers by the following expressions after judging a distance from input side conductor roller(1) to a welding point by welding point tracking if adjacent welding parts having different work specifications pass through the conductor rollers(1,2) arranged with being spaced apart from each other in a certain distance: {Expression 1} Q=¥í·A(C1+C2·TAVG)·ΔT (watts), where v is line speed (m/m), TAVG is average temperature between temperature in front of input side roller and target temperature, ΔT is increased temperature, C1 and C2 are coefficients, and A is sectional area of strip(4); {Expression 2} input electric power of conduction heater (QCH)=f·Q and input electric power of induction heater (QIN)=(1-f)·Q·η, where f(0¯1) is load distribution ratio between conduction heater and induction heater and η is efficiency of induction heater.
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