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What are the cutting methods for thick-wall spiral steel pipes?
Date:2020-04-24      Views:325Time      Label:What are the cutting methods for thick-wall spiral steel pipes?

1. There are two types of mechanical cutting: external installation and internal installation. It uses the principle of turning tool to cut the pipe mouth and bevel processing. The single machine has a large span, can be processed with large thickness, less waste, no pollution, no high temperature during the processing, does not affect the pipe material, and is beneficial to welding. Water cutting uses high-pressure pumps and silicon carbide to process pipes together. The cut is clean and the processing span is large, but its efficiency is low and the processing thickness is severely restricted.


2. Oxygen acetylene flame cutting, by adjusting the oxygen valve and acetylene valve, the mixing ratio of oxygen and acetylene can be changed to obtain three different flames: neutral flame, oxidation flame and carbonized flame.


3. Ion cutting, plasma cutting and different working gases can cut various metals that are difficult to cut with oxygen, especially for non-ferrous metals (stainless steel, aluminum, copper, titanium, nickel). Its main advantage is that when cutting metal with a small thickness, the plasma cutting speed is fast, especially when cutting ordinary carbon steel sheets, the speed can reach 5-6 times of the oxygen cutting method, the cutting surface is smooth, the thermal deformation is small, and less heat affected zone.