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Oxygen Fuel Gas Welding Introduction and PMA plasma brazing machine

Gas welding, English: oxygen fuel gas welding (referred to as OFW). A welding method in which a flame generated by mixing combustion of a combustible gas and a combustion-supporting gas is used as a heat source to melt the weldment and the welding material to achieve atomic bonding.
The combustion-supporting gas is mainly oxygen, and the flammable gas mainly uses acetylene and liquefied petroleum gas. The welding materials used mainly include combustible gas, combustion-supporting gas, welding wire, gas welding flux and the like. Features The device is simple and does not require electricity. The equipment mainly includes oxygen cylinders, acetylene bottles (such as acetylene as flammable gas), pressure reducers, welding torches, hoses, etc. Since the gas cylinder used to store the gas is a pressure vessel and the gas is a flammable and explosive gas, this method is one of the most dangerous among all welding methods.

Introduction: Gas welding is also called wind welding. PMA plasma brazing machine completely replaces traditional brazing equipment, and a new generation of brazing equipment that does not require oxygen, acetylene, liquefied gas, alcohol or gasoline flammable gas. Adopting the principle of IGBT inverter control, the flame is very stable during welding, and the whole equipment is light and convenient, suitable for outdoor welding. The welding machine is easy to operate, and the person who knows the welding machine can do it. No special training is required. This product does not require flammable and explosive gases such as acetylene, and the safety performance is greatly improved. Just use electricity, some undeveloped areas (no oxygen or acetylene, gasoline, etc.), etc.
The advantages of ion brazing machines are very obvious. In the welding process, the gas flux can be directly used instead of the traditional manual addition of borax to improve the wettability and fluidity of the brazing, so as to reduce the generation of pores. Improve the tensile strength of the weld, the surface is not oxidized during the welding process, and does not black. No pickling is required, which greatly improves the welding efficiency.

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Origin and classification of cattle

First, the taxonomic classification of cattle:

Vertebrate door (Verterbrata )

Mammalia (Mammalia)



Cave Corner (Covicornia)


Bos: Bos taurus, Bos indicus, Bos gruniens, Asian bison, European bison

Bubalus: Asian buffalo, African buffalo

Second, according to the use can be divided into: milk cattle, beef cattle, milk and cattle, cattle, etc.

Third, the ancestors of cattle:
The ancestor of the common cattle is the original cattle (Bos primigenius)
The ancestor of the yak is the wild yak (Bosmutus)
The ancestor of the buffalo is wild buffalo (Bubalusarnee)

Fourth, China’s famous cattle breeds: Qinchuan cattle, Nanyang cattle, Mongolian cattle, Luxi cattle, Yanbian cattle