Waveform-controlled / pulsed welding (optional)
If the power source reports total energy (J) or instantaneous power (W), enter it here; arc energy is then taken directly as energy ÷ weld length.
Arc energy E– kJ/mm
Heat input Q = k × E– kJ/mm
Thermal efficiency k–
E = U × I × 60 / (v × 1000) kJ/mm (v in mm/min). Heat input Q = k × E.
ASME IX and AWS mostly use arc energy without a thermal efficiency factor; EN/ISO use heat input with k. Which value is required is decided by the WPS and the specification.
For information only; the WPS and the specification govern. The final assessment rests with the responsible welding engineer.
The app checks the heat input range of your WPS automaticallyThe Welding module compares welding parameters with the WPS, flags out-of-range values and prepares the PDF report.
See the Welding module
Curious?
Why does heat input matter?Heat input sets the cooling rate. Too high gives grain coarsening and loss of toughness; too low gives a hard, crack-prone HAZ (heat-affected zone). That is why most WPSs state a lower and an upper limit.
Are arc energy and heat input the same?No. Arc energy is the electrical energy delivered by the machine; heat input is the share that reaches the part, calculated with the process-dependent thermal efficiency factor k. The two are sometimes called by the same name, so state which one your report shows.
Why do average values mislead in pulsed welding?In pulsed welding voltage and current change continuously; average voltage × average current may not equal the real power. The instantaneous power or total energy measured by the machine gives a more accurate result.
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