Excuse me, how to adjust the fire by gas cutting?

1, the power of preheating flame will increase with the increase of plate thickness, and the thicker the cutting piece, the greater the power of preheating flame;

2. When cutting thick steel plate, mild carbonization flame should be used to avoid the collapse of the upper edge of the incision and make the outer flame longer. ?

3. When using diffusion nozzle and oxygen curtain nozzle to cut the steel plate with the thickness below 200mm, the flame power should be higher to accelerate the heating of the front edge of the incision to the ignition point, so as to obtain a higher cutting speed.

4. When cutting steel with high carbon content or high alloying elements, the power of preheating flame is higher because their ignition point is higher.

5. When cutting the groove with a single cutting nozzle, the flame power should be increased to supplement energy because the slag is blown to the outside of the incision.

Extended data:

Gas cutting principle:

It uses the flame heat energy of the mixed combustion of combustible gas and oxygen to preheat the cutting part of the workpiece to a certain temperature, and then injects high-speed cutting oxygen flow.

The metal is violently oxidized and gives off heat, and the molten metal oxide is blown away by the cutting oxygen flow to realize cutting. The gas cutting process of metal is essentially the combustion process of iron in pure oxygen, not the melting process.

The ignition point of metal in oxygen should be lower than its melting point, and the melting point of metal oxide should be lower than that of metal during gas cutting. The combustion of metal in cutting oxygen flow should be an exothermic reaction, and the thermal conductivity of metal should not be too high.

References:

Baidu encyclopedia-gas cutting