How to adjust the gas cutting preheating flame, how to adjust the best flame for gas cutting

Ignite to a neutral flame.

Adjust the size of the preheating flame according to the thickness of the object, and use the pressure of oxygen accurately according to the thickness of the object.

If the oxygen is not turned on, only acetylene is turned on, the burning flame will be red, and black smoke will be emitted, and a black filamentous substance will float out, if the oxygen is not turned on enough (or the mixture is not in the right proportion), the burning flame will turn yellow, and over time, there will be a small amount of carbon deposits on the cutting nozzle to block the preheated oxygen outlet.

How to use gas cutting and adjust the fire, how to adjust the fire of the gas cutting is the most powerful? Techniques for gas cutting and adjusting flames.

The carbonization flame core is relatively long, the flame is empty, that is to say, the combustion is not complete, the black smoke is emitted, the neutral flame carbon-oxygen ratio is just very small, the oxidation flame oxygen ratio is large, the flame is short, the gas cutting is generally with a neutral flame, the flame size can only be determined by experience, hehe, both to be able to smoothly cut through the steel plate, but also can not melt the edge of the steel plate, is the most suitable, if the oxygen is large, the edge of the steel plate will be oxidized, and the liquefied gas will emit black smoke, so that the edge of the steel plate is carbonized at high temperature, affecting the quality of the steel.

1. Open the acetylene gas handwheel valve, slightly open the oxygen handwheel, and ignite.

2. Turn it to a neutral flame, preheat the steel plate, and turn on the cutting oxygen when it just begins to melt.

3. Pay attention to determine the size of the preheating flame according to the thickness of the steel plate.

4. Determine the pressure of oxygen according to the thickness of the steel plate.

The tutorial on how to adjust the best flame for gas cutting is as follows:Prepare materials: gas cutting, lighter.

Operation steps: 1. Open the acetylene handwheel valve.

2. Slightly open the oxygen handwheel.

3. Ignite, adjust to a neutral flame, and preheat the object.

4. Adjust the size of the preheating flame according to the thickness of the object.

5. As long as the pressure of oxygen is used accurately according to the thickness of the object.

Kiss hello and happy to serve you: the method of gas cutting and fire adjustment: the flame should be adjusted in this way when gas cutting:

Before gas cutting, the gas cylinder, oxygen meter, acetylene gas meter (must be equipped with a tempering device), gas belt, gas cutting torch should be installed and connected, according to the provisions of the top gas, gas cutting on the acetylene gas switch on the gas cutting torch to open the ignition, and then the gas cutting torch on the oxygen and acetylene gas mixing switch slowly opened, adjusted to carbonization flame, you can start cutting. Or method: 1. First of all, the safety switch, then turn on the oxygen switch, the start of the fire can not be too big, otherwise the fire will be extinguished when the oxygen is adjusted, and the flame will turn blue, which is the so-called flame collection, bake the edge of the target to be cut red, and then open the top switch; 2. Gas welding is the use of flame to heat the metal and welding wire at the connection of the metal workpiece to melt it to achieve the purpose of welding, the commonly used combustible gas is mainly acetylene, liquefied petroleum gas and hydrogen, etc., and the commonly used combustible gas is oxygen.

After cutting, the moving speed of the torch should be uniform, and the distance between the cutting nozzle and the cutting piece should be about equal to the length of the flame core 2 4mm. The quality of gas cutting depends largely on the nozzle, that is, the air line. The thin plate should be made with a low fire, and the cutting nozzle should be high from the plate, the inclination angle should be large, and the cutting speed should be fast.

The aim is to reduce deformation.

The nozzle can be tilted 20° to 30° backward (i.e. in the direction of the cutting forward). In the process of gas cutting, if there is a detonation and backfire, the cutting oxygen valve should be closed immediately, and then the preheating oxygen valve and acetylene valve should be closed in turn to suspend the gas cutting process. If the carbonization flame is more than 30 for the thick plate, the high-pressure wind should be large and the deformation of the wind line bar shall prevail, and the speed should be slow and stable.

Beginners should hear the puff. Also pay attention to the perpendicular of the wind line to the plate.

How to use gas cutting and adjust the fire, how to adjust the fire of the gas cutting is the most powerful? Techniques for gas cutting and adjusting flames.

Turn on the gas first, turn on a small point to ignite the welding gun, then turn the gas valve up (red leather pipe connection, lower part of the welding gun), and then open the oxygen valve (black leather pipe connection, upper part of the welding gun) When the flame is collected into a concentrated flame, you can start cutting, if the flame is not concentrated, the temperature does not meet the requirements, and the edge of the cut steel plate is not neat, the oxygen should not be turned on too much, so the fire will be extinguished.

At the beginning of the cut, burn the starting position and then start moving the torch slowly.

The so-called fire is too big to open acetylene, and there are two disadvantages, one is that the flame temperature is too high, and the slit is easy to be blocked by melted iron oxide, which makes it difficult to separate the workpiece and the scraps, and it is very difficult to clean the burr, especially in the thin plate, and then there is a serious waste of acetylene.

The fire is small, it can't be cut through directly, and it wastes oxygen.

How to use gas cutting and adjust the fire, how to adjust the fire of the gas cutting is the most powerful? Techniques for gas cutting and adjusting flames.

How to use gas cutting and adjust the fire, how to adjust the fire of the gas cutting is the most powerful? Techniques for gas cutting and adjusting flames.

How to use gas cutting and adjust the fire, how to adjust the fire of the gas cutting is the most powerful? Techniques for gas cutting and adjusting flames.