induction heating hot rolling

Description

induction heating hot rolling with IGBT induction heating system

Objective To heat the circumference of plough discs before hot rollingย (sharpening) process
Material Flat Boron steel discs, OD 460 to 710 mm (18 to 28โ€)ย thickness 3.2 to 10 mm (8/64 to 25/64โ€)
Temperature 725ยฐC 1335ยฐF
Frequency 75 kHz
Equipment DW-HF-120 kW induction heating system using 2 work heads,ย switching system, 4 specially-designed coils, chiller system
Process In a PLC system, each of two rolling machines is equippedย with a remote work head and with a rotating platform where theย disc is held horizontally and held in position by a central nonmagnetic
plate 100 mm less that the disc diameter. The 250ย mm (10โ€) heating coil is positioned over the blade, rotationallyย ahead of pressure rolls. This heats the entire edge of the disc.
After a few seconds of heating, the edge reaches the requiredย temperature and the disc is made to turn at 30 rpm. Theย pressure rolls close, forming the sharp edge profile. The finalย edge is obtained after two turns of the disc.
Results/Benefits Induction heating provides a much more rapid processย compared to cold-rolling; the desired profile is achieved after aย few seconds, compared with a few minutes.ย The metallurgical quality of the finished edge is higher, sinceย the process effectively hardens the material.
The equipment and process lend themselves to roboticย automation

induction heating hot rolling

 

 

 

 

 

 

induction hot rolling

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