A Gas Cutting Machine is a cutting tool used for cutting metal using oxygen or gasoline plus oxygen. It is a powerful technology used in heavy industries. Fuel gases include acetylene, propane, MAPP (methylacetylene-propadiene), propylene and natural gas. The performance of these fuel gases, including pierce time and cutting speed, is determined by the flame temperature and heat distribution in the inner and outer flame cones.
Gas Cutting Machine uses a flame produced by burning fuel gases and oxygen. A torch head is used to heat metals to an ignition temperature, usually around 700-900 degrees Celsius. Then, a stream of pure oxygen is trained onto the hot metal. The oxygen chemically combines with the iron to oxidize it into molten iron oxide which quickly flows out of the cut, or kerf. The slag that forms during this process is removed by grinding or tapping the workpiece. Filler metal and fluxes are often applied to protect the weld pool from oxidation by preventing the metal from becoming too hot or melting. The welding gas can be a combustible mixture of acetylene and propane, or it may be MAPP, a high-pressure gas with a temperature similar to acetylene, whereas it is less volatile. MAPP is not as popular as acetylene. It can be used for welding a wide variety of materials and is much cheaper. Gas cutting is a process that uses gas and oxygen to cut metal. The process begins with the metal component being warmed by a gas and oxygen mixture, reaching a temperature of 700-900 degrees Celsius, which is known as an “ignition” temperature. The flame of the Gas Cutting Machine is then directed to the area to be cut using a nozzle that directs both the primary oxygen stream and several secondary streams of the fuel gas, such as acetylene. The flames burn the metal and release a molten oxide called dross, which is then blown away by air. The most common gas used for Gas Cutting Machine is acetylene, whereas propane can also be employed. Unlike acetylene, which produces a relatively concentrated flame, propane is more spread-out. Its peak flame temperature is lower than acetylene, it has a similar heat release rate for both the primary and secondary flames. This makes it a good choice for most cutting applications. Brazing is a heat-fusion process used to join dissimilar metals. It differs from welding in that it does not involve melting the base metals to be joined. Instead, a filler metal with a liquidus temperature above 840oF (449oC), below the melting point of the base metal is heated until it liquefies and distributes itself by capillary attraction in the joint.
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