Induction Heating Bolts And Nuts With High Frequency Bolts Heating Equipment
Objective Heating steel boltsย to 1500ยบF (816ยบC) for threadย rolling
Material H11 tool steel, A286 stainless steel, Titanium and 8740 alloyย steel boltsย of various sizes. Typical size is 1โย (25.4mm) diameter, 1.5โ (38.1mm) long
Temperature 1500ยบF (816ยบC)
Frequency 214 to 216 kHz depending on part
Equipment โข DW-UHF-10kW induction heating system, equipped with aย remote workhead containing two 1.25ฮผF capacitors for aย total of 0.625 ฮผF
โข An induction heating coil designed and developedย specifically for this application.
Process A four turn helical coil is used to heat the shaft of the bolts toย 1500ยบF (816ยบC). The 1โ (25.4mm) diameter H11 boltsย requires 30 seconds to reach temperature. The heating cycles
varies from 20 to 45 seconds depending on the size of theย part.
Results/Benefits Induction heating provides:
โข Faster cycle times and extended tool life with preheat step
โข Hands-free heating that involves no operator skill forย manufacturing
โข Using same coil for various size blanks
โข Stronger and more fatigue-resistant threads
