Why is it that when I am qi cutting, the flame is not well adjusted and the cutting is not good, ple

Turn on a little propane or acetylene to ignite, then slowly turn on the preheated oxygen, and reduce the fire to the flame you need (generally use a neutral flame is better, the flame has a flame center, an inner flame, and an outer flame).

When cutting in a squatting position: place both hands on the outside or inside of the legs, and use the legs as the focus point. Pinch the cutting oxygen switch with the index finger and the big female finger of the left hand, grasp the handle of the gun with the right hand, and push a little force to the right with the left hand and the right hand to the left, and then move the flame to the cutting place to start warming up

If you cut from left to right, your left hand should be more forceful than your right hand; If right to left, it's the opposite!! It can also be used as a focus point with one hand and one leg).

Standing: You can combine your left elbow with your waist or your right elbow with your waist, or both.

In the machining process, you can also rely on the workpiece, and in special cases you can also use your left and right wrists as the focus point!!

You can try to operate the above, I hope it will help you.

Practice makes perfect!!

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.

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.

Qi cut gas cut (pinyin: qìgē; English: gas cutting) refers to the use of oxygen-acetylene (or other combustible gases, such as propane, natural gas, etc.) flame heat energy to metal (such as steel plate, carbon steel, alloy steel is not cut, section steel or copper ingot) cutting.

The combustible gases used in gas cutting are mainly acetylene, liquefied petroleum gas and hydrogen. The mixing of combustible gas with oxygen and the injection of cutting oxygen are done with a cutting torch, which has one more oxygen tube than the welding torch. Gas cutting is a commonly used metal thermal cutting method in various industrial sectors, especially manual gas cutting is flexible and convenient to use, and is an indispensable process method for sporadic blanking, dismantling, installation and dismantling of waste materials in factories.

Basic Information. Chinese name: gas cutting.

Nature: Terminology.

Principle: The combustion process of iron in pure oxygen.

Gases used: acetylene, LPG and hydrogen.

Prescribe acetylene. Ignition. Turn on oxygen. Fine tune. until the heart is blue. The state of the flameblowout.

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.

The most commonly used flame in gas welding is oxygen-acetylene flame, which can be divided into three types: neutral flame, oxidation flame and carbonization flame according to the ratio of oxygen to acetylene.

Neutral flame: The flame formed by combustion when O2 C2H2 = 1. The flame structure can be divided into three parts:

Flame Heart, Inner Flame, Outer Flame. The flame core is composed of unburned oxygen and acetylene. The outer surface of the flame core is distributed with a layer of carbon particles formed by the decomposition of acetylene, and the temperature is high (about 900 °) The hot carbon particles emit a bright white light, which is pointed and cone-shaped, and the outline is clear.

The internal flame is mainly composed of acetylene and the products of incomplete combustion (H2 and CO), which is reducible, blue-white, with unclear contours, and has no obvious boundary with the outer flame. The temperature of the inner flame is very high, up to 3150 °C. The outer flame is composed of CO2 and water vapor produced after the complete combustion of CO and H2 and O2 in the air, and has oxidizing properties.

The temperature of the outer flame is in the range of 1200-2500, and gradually changes from lilac to orange-yellow from the inside to the outside.

Oxidizing flame: The flame formed by combustion when O2 C2H2 >. The flame structure can be divided into two parts: the core flame and the outer flame.

There is an excess of oxygen in the flame, forming an oxidizing oxygen-rich zone outside the flame center. The flame core is short, pointed, and bluish-white. Outside the flame center is a slightly purple outer flame, which is shorter than the normal outer flame.

The flame straightened. Carbonization flame: The flame formed by combustion when O2 C2H2 < 1. Oxygen is not enough for acetylene to burn completely, and the excess acetylene decomposes into carbon and hydrogen.

Carbon will seep into the molten pool and cause carburization of the weld, so it is called carbonization flame. The carbonization flame has a strong reducing effect. The flame structure is also divided into three parts:

Flame Heart, Inner Flame, Outer Flame. The flame center is white with a slight bluish tinge on the periphery; The inner flame is pale white in color; The outer flame is orange-yellow. When the amount of acetylene is high, it also carries black smoke, and the flame is long and soft.