Suggestions On The Method Of Safely Cutting Thick-walled Seamless Steel Tubes

Seamless steel tube cast iron plate is generally used in pipelines, especially for hydropower stations. Because hydropower stations are a large amount of water for power generation, the required pipelines are relatively thick, and the volume of stored water is relatively large. Generally, the speed of water flow is also required. fast. Therefore, many welded pipes are made of seamless steel pipes and flat plates are welded to form straight seam welded pipes or ssaw steel pipes. The following are the production processes and methods of seamless steel pipe cast iron plates:

1. Cutting amount: When cutting thin standard steel tube cast iron plate, the cutting force should be small and the clamping force should be small. Then, the cutting depth should be small (about 0.3~0.5mm) and the feed rate (about Take 0.1~0.25mm/reciprocating stroke), and normal cutting speed, and properly cool the lubricating fluid for cutting.
2. Fixing of seamless steel tube cast iron plate: Thin seamless steel tube cast iron plate is usually clamped directly on the workbench with the support plate. The clamping force it produces is very conducive to the clamping of thin seamless steel cast iron plates. In order to ensure the reliability and stability of thin seamless steel tube cast iron plate clamping, the two sides of the steel tube cast iron plate must be processed in advance. Otherwise, the side of the gusset and the cast iron plate will not be in good contact, which will cause the cast iron plate to be unevenly deformed.

When clamping, the reference surface of the seamless steel cast iron plate must be in close contact with the work surface or flat horn. Can not beat the seamless steel cast iron plate with the hand, because the thin seamless steel cast iron plate is poor in rigidity, easy to deform, break, and also has elasticity, so the more the tapping, the more the cast iron plate is not tight with the positioning surface and the clamp is not tight. If the gap under the flat steel cast iron plate is due to the uneven bottom surface of the cast iron plate, it should be finished with metal.

Thick-walled high-precision cold drawn seamless steel pipe is a common type. It is a special material for thick-walled steel pipes. It is more important to protect the most basic use and play more important performance. Thick-walled seamless steel pipe is an important material for seamless steel pipe. Its hardness is relatively large. Generally, it is difficult to master the cutting skills and methods when cutting. In this way, thick-walled pipe can be cut successfully. Injury to people. For safe cutting, the following are recommended:

1. Mechanical cutting adopts two kinds of external installation and internal installation. It adopts the principle of turning tool to cut and groove the nozzle. The single machine span is large, the processing thickness is large, the waste is small, no pollution, and the processing process does not produce high temperature. Does not affect the pipe material, which is conducive to the welding process. The water cutting process is processed by the high-pressure pump and the corundum, and the cutting is clean and the processing span is large, but the efficiency is low, and the processing thickness limitation factor is serious.
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, oxidized flame and carbonized flame.
3. Ion cutting, plasma cutting with different working gases can cut a variety of oxygen cutting difficult to cut metal, especially for non-ferrous metals (stainless steel, aluminum, copper, titanium, nickel) cutting effect; its main advantage is cutting thickness When the metal is not large, the plasma cutting speed is fast, especially when cutting ordinary carbon steel sheet, the speed can reach 5-6 times of the oxygen cutting method, the cutting surface is smooth, the thermal deformation is small, and the heat affected zone is less.

A worker from a steel pipe company, which is located in China.