Steel plate cutting speed control

Relationship between Cutting Speed and Material Thickness
The cutting speed needs to be dynamically adjusted according to the steel plate thickness. The empirical formula is V = K × I / δ (where K is the material coefficient and δ is the plate thickness). For example, for 30mm carbon steel, the recommended current is ≤260A; too fast a speed will easily cause slag buildup, while insufficient speed will lead to arc interruption. For thick plates (such as 300mm), the speed needs to be reduced by 20% to ensure quality.

Process Parameter Optimization
Gas selection: Oxygen for carbon steel (0.6-0.7MPa), nitrogen + hydrogen mixture for stainless steel.
Nozzle height: Maintain at 1.5-2 times the hole diameter, with arc voltage fluctuation controlled within ±5V.
Thermal deformation compensation: Reserve 0.1mm shrinkage for every 10mm of plate thickness.

Intelligent Control Technology
The CNC system monitors the arc voltage in real time. When the fluctuation exceeds 8%, the speed is automatically adjusted by ±10%. After test cutting a 300mm plate, the cut quality is checked. If the slag buildup is >0.5mm, the speed is increased by 5%; if the bevel angle is >3°, the speed is decreased by 8%.