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Answers to the experience of fire control of CNC flame cutting machine

Edit:Xuzhou Yahong CNC Equipment FactoryUpDate:2018-10-24

CNC flame cutting machine tuning experience

The quality of the workpiece cut by the CNC flame cutting machine is partly related to the accuracy of the equipment. The other part is directly related to the tuning of the operator. The flame cutting varies according to the cutting gas. Many companies purchase it at one time. After two pieces of equipment, at the same time, one workpiece is cut at the same time, and the effect is still uneven. After all, the reason is not in place for the operator to adjust the fire. In order to let the enterprise fully exert the value of the CNC cutting machine, the following CNC cutting machine manufacturers CNC Technology Co., Ltd. Focus on the tuning techniques for your friends to see.

To use a fully automatic cutting machine, it is first necessary to master the torch flame. The adjustment of the flame is mainly on the gas source. Generally, the oxygen in the processing area of ​​the enterprise mostly supplies oxygen to the pipeline. The purity and pressure of oxygen can generally reach the application requirements, but the gas Most of the bottled gas supply, 30 kg of a bottle of gas, in the scale of 5 machines and 5 streams, the application time is about 2 hours, so that the gas source must be replaced halfway, which will cause the gas pressure to shake greatly, directly affecting the gas. The flow rate is causing the cutting to be abnormal. In addition, the bottled gas is shaken at the beginning and end of each bottle of gas. The adoption of warm water heating is a good way to ensure the stability of the gas source. In addition, it is necessary to ensure the current equipment. Nothing, usually should be based on the operating procedures, regularly check the leakage of the pipeline and joint number, smooth the lubrication of the bearing, pin hole, etc., finishing the cutting nozzle, cooling water pipe, etc., complete some routine procedural operations, and ensure the operation Normal, and then to improve, to improve.

There is also a doubt in the use of automatic flame cutting machine. When producing a variety of steel-high carbon steel, observe the work of the flame cutting machine, the completion of the cutting process is very reluctant, and then based on experience, flame adjustment and other aspects of knowledge Close contact, especially for steel grades, requires us to strengthen our study and research and master a wide range of knowledge.

The good and bad cutting effect of the CNC flame cutting machine depends largely on the mastery of the tuning technology. The different cutting gas used in the CNC flame cutting machine, when cutting for different thickness carbon plates, the flame temperature should also be controlled to consider the cutting speed. In order to better understand the tuning operation of the portable CNC flame cutting machine, the single-plane laser cutting machine manufacturers will summarize the commonly used cutting gas characteristics as follows for your reference.

In general, when using a portable CNC flame cutting machine, three cutting flames can be obtained by adjusting the ratio of oxygen to acetylene: normal flame, oxidizing flame and reducing flame. The three types of cutting flame characteristics are different. In general, cutting a steel plate of 200 mm or less can achieve better cutting quality using a normal flame. When cutting a large-thickness steel plate, the reducing flame should be preheated and cut, because the flame of the reducing flame is relatively long, and the length of the flame should be at least 1.2 times the thickness of the plate.

The reducing flame is produced in the case of excess acetylene. The flame core has no obvious contour, and the end of the flame core has a green edge. According to the green edge, there is excess acetylene; the reduction zone is abnormally bright, almost The flame core is mixed; the outer flame is yellow. When there is too much acetylene, it starts to smoke, because acetylene combustion in the flame lacks the necessary oxygen.

The oxidizing flame is produced in the case of excess oxygen. The flame core is conical, the length is obviously shortened, the outline is not clear, and the brightness is dim. Similarly, the reduction zone and the outer flame are shortened, and the flame is purple-blue. The sound is accompanied by a sound, and the sound is related to the pressure of oxygen. The temperature of the oxidizing flame is higher than that of the normal flame. If the oxidizing flame is used for cutting, the quality of the cutting will be significantly deteriorated.

The normal flame is characterized by no free oxygen and activated carbon in its reduction zone, with three distinct areas, and the flame core has a sharp outline (close to a cylindrical shape). The composition of the flame core is acetylene and oxygen, and its ends are uniformly round and shiny. The outer shell consists of red hot carbon dots. The temperature of the flame core reaches 1000 °C. The reduction zone is outside the flame core and the distinct difference from the flame core is its darkness. The reduction zone consists of carbon monoxide and hydrogen, which are not completely burned by acetylene, and the temperature in the reduction zone can reach about 3000 °C. The outer flame is the complete combustion zone, which is located outside the reduction zone. It consists of carbon dioxide and water vapor, nitrogen, and its temperature varies between 1200 and 2500 °C.