Heat Input Calculation Formula
The heat input calculation formula indicates how much energy is introduced into a welding process. It is calculated from current, voltage, and speed.
Physical-Chemical Mechanism of Action
The formula calculates thermal energy (in joules) as the product of current (in amps), voltage (in volts), and time (in seconds). The welding speed affects how this energy is distributed across the materials.
Metallurgical Relevance & Welding Risks
An inaccurate calculation can lead to insufficient or excessive heat input. Too little energy can cause the steel not to melt properly, leading to cracks. Too much energy can cause overheating and distortion.
Workshop Practice & Action Instructions
To apply the formula correctly, you need to know the exact values for current (A), voltage (V), and time (t) in seconds. The calculation is: Energy = A * V * t. Make sure all measuring instruments are calibrated and that the values are entered accurately.