Why Are Auxiliary Gases Added During Processing?

Why are auxiliary gases added during processing?

Before we can figure out how to choose an auxiliary gas, we must first understand why it is used and what it does. Experience: in addition to blowing away the slag in the coaxial slit, the auxiliary gas can also cool the surface of the processed object, reduce the heat-affected area, cool the focusing lens, and prevent the dust from entering the lens seat to contaminate the lens and cause the lens to overheat; In addition, some cutting gas can also protect the base metal. The selection of gas pressure and type has a great influence on the cutting process, and the selection of auxiliary gas will have a certain influence on the cutting performance, including cutting speed and cutting thickness.The auxiliary gases that can be used by laser cutting machine mainly include air, nitrogen, oxygen and argon. Next, we will introduce the application and characteristics of the Chinese laser for different auxiliary gases.1, air,Air is supplied directly by the air compressor, so it is very cheap compared to other gases. Although the air contains about 20% oxygen, the cutting efficiency is far less than that of oxygen, and the cutting ability is close to that of nitrogen. Trace oxide film may appear on the cutting surface, but it can be used as a measure to prevent the coating from falling off. The end face of the cut is yellow.The main applicable materials are aluminum, aluminum alloy, stainless copper, brass, electroplated steel plate, non-metal and so on, but, when the cutting product quality requirements are higher, aluminum, aluminum, stainless steel and so on are not suitable for air, because air will oxidize base material.2, nitrogenSome metals are cut using oxygen to form an oxide film on the cutting surface, while nitrogen can be used for non-oxidizing cutting to prevent the film from appearing. Thus, it can be directly welding, coating, corrosion resistance and other characteristics. The end face of the cut is white.The main suitable plates are stainless steel, electroplated steel plate, brass, aluminum, aluminum alloy and so on.3, oxygen,Mainly used for laser cutting carbon steel. While using the large surface of oxygen reaction heat to improve the cutting efficiency, the oxide film will increase the spectral absorption factor of the reflected material. The end face of the cut is black or dark yellow.It is mainly used for calendering steel, calendering steel for melting construction, carbon steel for mechanical construction, high tension plate, tool plate, stainless steel, electroplated steel plate, copper, copper alloy, etc.4, argon gasArgon is an inert gas, which is used to prevent oxidation and nitriding in laser cutting machines, and is also used in welding. Compared with other processing gases, it has a high price, which increases the cost accordingly. The end face of the cut is white.The main applicable materials are titanium, titanium alloy and so on.In the above content, a lot of gas can be common use, the key to consider cutting cost and demand for products, such as cutting stainless steel materials, as for the product quality or surface quality is not very high requirements, such as cutting late products also need to process after spray paint and other craft processing, can use air as cutting gas, can decrease the cost of many. When cutting the product is the final product, there is no follow-up process, the need to use protective gas, such as process products. Therefore, in the cutting cutting process must be based on the characteristics of the product to choose the gas.