• 

  2015 Hua Fei CNC company dinner

• How to choose a suitable welding positioner?

• How to maintain the welding positioner?

• Rescue measures for CNC cutting machine with large cutting error

• How to protect a welding positioner?

• How to purchase a good welding positioner?

• Maintenance method of special welding chuck for positioner

• How much do you know about the classification of the welding rotators?

• Structure Types of Welding positioners

• The 8 principles for choosing a welding positioner

• Common fault problems and solutions of welding positioner

Flame cutting is a gas flame processing method that uses the heat emitted by combustible gases to cut metal. After using the energy of the gas flame to preheat the cutting piece to a certain temperature, a high-speed cutting oxygen stream is ejected to burn it and blown off by the high-speed oxygen stream.

Flame cutting is the oldest thermal cutting method. Its cutting thickness is from 1mm to 1.2m. Flame cutting is to use the high temperature generated during the combustion of iron oxide and complete the cutting by cutting oxygen. The design of the flame torch provides sufficient oxygen for burning iron oxide to ensure good cutting results.

Flame cutting involves three processes: preheating, combustion, oxidation, and slag blowing.

Oxygen is selected as the combustion-supporting gas for flame cutting. Combustible gases include acetylene, gasoline, natural gas, petroleum liquefied gas, and hydrogen.

Flame cutting is affected by many factors, but the main factors affecting the cutting quality and cutting processes are as follows.

1. The influence of oxygen purity: The oxygen purity has a great influence on cutting speed, oxygen consumption and cutting quality of gas cutting. Oxygen purity decreases, cutting speed becomes slower. Metal burns worse in oxygen, which will affect cutting quality.

2. Impact on impurities and defects to metal: The inclusion of impurities in the metal has a great effect on flame cutting, and some impurities even make the metal unable to perform the flame cutting.

3. The influence of gas purity on cutting quality: The purity of gas has little effect on the cutting quality and cutting processes, but impurities in the gas will have a certain effect.

4. The effect of cutting speed on cutting quality: The flame cutting speed must be appropriate, not too fast or too slow, the upper edge burns down, the lower edge is seriously dross, the cut is widened, and the quality of the cutting surface is also not ideal.

Previous Article：What are the main factors that affect the quality of flame cutting?

Next Article：Maintenance and equipment precautions of CNC plasma pipe cutting machine