HEAT INPUT IN ARC WELDING

ARC ENERGY AND HEAT INPUT IN ARC WELDING

In arc welding process, heat input HI and arc energy AE are measures of how much heat input has been supplied to the job being welded. unit of HI is kj/mm or kj/in. If travel speed is in mm then unit will be kj/mm

arc energy AE  =  60VI / 1000s

I   =  CURRENT IN AMPS

V  = VOLTAGE

 s  = TRAVEL SPEED OF WELDING

RELATION BETWEEN HEAT INPUT AND ARC ENERGY 

Heat Input HI  =  nAE

n is process efficiency
SMAW   = 0.55 to 0.8
GMAW  = 0.95
FCAW   = 0.90
SAW      = 1.0

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