Basic knowledge of flame cutting

1. Definition of flame cutting,

It is also called oxygen cutting, which uses a preheating flame to heat a certain point on the surface of the steel plate to the ignition point (about 1000 ℃), and then fills the ignition point with high-pressure oxygen to support combustion, so that the steel plate is burned to form a cutting method. Its applications are mainly limited to the cutting of carbon steel and large thickness plates, and it will gradually be replaced by plasma cutting in the cutting of medium and thin carbon steel plates.

Gas required for flame cutting,
Heating gases (acetylene, propane, gas)
Combustion gas (oxygen)
The evolution of flame cutting

Manual cutting (can't control the route and speed, low cutting accuracy) - trolley cutting (can only walk in a straight line) - copy cutting (it is troublesome to make models, can't cut continuously, can't cut multiple graphics, can't cut combined graphics) - CNC cutting

2. The advantages of CNC flame cutting compared with trolley and profiling;
1. It is convenient to cut according to the computer drawing;
2. It can be multi-graphic and complex cutting, simple;
3. It can continuously cut a complete piece of steel plate with high efficiency;
3. The definition of straight cutting, the calculation method of the number of cutting torches for straight cutting.
The cutting method of using multiple flame cutting torches to cut the steel plate into several steel bars at the same time;
Thermal deformation: high temperature deformation
Calculation method: In order to ensure that the thermal deformation of each steel bar is small, the heating of the two steel bars must be uniform during cutting, so the number of straight cutting torches must meet this requirement.