How to avoid gas cutting defects in large cast steel parts?


Time:

2023-06-26

Cast steel parts of the gas cutting process is mainly the use of oxygen and acetylene gas mixture burning flame, heating the cutting place, as the temperature rises to a certain range, and then use the cutting gun cutting nozzle pure oxygen hole in the spray of oxygen to make the cutting place violent combustion, combustion of the resulting oxidized steel blown off by the oxygen flow, and constantly form the cut, so as to complete the entire gas cutting cutting cutting process.

How to avoid gas cutting defects in large cast steel parts?

Cast steel parts of the gas cutting process is mainly the use of oxygen and acetylene gas mixture burning flame, heating the cutting place, as the temperature rises to a certain range, and then use the cutting gun cutting nozzle pure oxygen hole in the spray of oxygen to make the cutting place violent combustion, combustion of the resulting oxidized steel blown off by the oxygen flow, and constantly form the cut, so as to complete the entire gas cutting cutting cutting process.

1, cutting oxygen pressure size should be appropriate. When the cutting pressure is too large, not only will waste oxygen, but also lead to rough surface of the cut; gas cutting pressure is too small, gas cutting oxidation slag is difficult to blow off, the slag of the cut is easy to stick together and difficult to remove.

2, gas cutting speed to be appropriate. Gas cutting speed is too fast, the cast steel parts are not easy to cut through, cutting speed is too slow, the thinner part will appear excessive deformation. Therefore, when cutting, cutting workers should grasp the appropriate speed, when the slag and sparks can fly vertically downward, the kerf is smooth and clean.

3, preheat the flame energy rate to be appropriate. Preheating flame energy rate is too large, the cast steel parts cut surface angles are easily melted; flame energy rate is too small, the gas cutting process is easy to interrupt, the cut will also be untidy.

4, the correct operation. Cutting workers in cutting, to do a person squatting steady, hand holding tight, and along the cutting line for gas cutting, so as to ensure the straightness of the cut.