Induction Soldering Fuse Caps With IGBT Induction Heating Units
Objective Soldering three fuse caps simultaneously to reflow lead freeย solder and make a joint between the fuse cap and fuse wireย guide
Material Plated copper end caps 0.375โ (9.5mm) OD x 0.375โ (9.5mm)ย height, ceramic fuse tube 1.5โ tall (38.1mm) , lead free solderย preforms
Temperature 700 ยบF (371 ยบC)
Frequency 286 kHz
Equipment โข DW-UHF-20ย kW induction heating system, equipped with aย remote workhead containing two 1.0ฮผF capacitors for aย total of 0.5ฮผF
โข An induction heating coil designed and developedย specifically for this application.
Process A three position two turn helical coil is used to solder threeย fuse caps simultaneously. The fuse assemblies are placed inย the coil and the heat is applied in three cycles at 3.5 secondsย per cycle to reflow the solder. On the production line theย bottom caps are soldered first. The fuses are filled with sandย and without flipping the assembly the top cap is soldered.
Results/Benefits Induction heating provides:
โข Consistent, repeatable results
โข Precise & accurate heat application
โข Hands-free heating that involves no operator skill forย manufacturing
โข Even distribution of heating
