Steel pipe bending

The steel bend pipe is bent by a complete set of bending equipment, which can be divided into two processes: cold - simmering and hot - pushing.No matter which kind of machine equipment and pipeline, most of them are made of steel bending pipe, which is mainly used for oil transportation, gas transportation, liquid transportation, engineering bridge construction, etc.

Method of use

Analysis on the main reasons causing the quality decline of steel bending pipe and methods for attention:

1. When the pipe is completely bent, the tensile stress on the lateral arm wall of the middle layer is reduced under the action of external force distance M, while the tensile stress on the lateral arm wall of the middle layer is decreased under the action of &1, and the compressive stress on the inside is reduced.The joint forces N1 and N2 change the cross section of the pipe.Based on this factor, causes the decrease of the quality of the steel pipe bending of the main reason for the RX and SX so GBJ235-82, RX value of under various pressure levels and thinning of the lateral mass were made specific provision, the purpose is to control the value of RX and SX, to ensure the quality.

2, has spoken of the preceding article, steel pipe materials when the lateral tensile, compression of the inside of the neutral axis location is different with steel pipe bending method, when he worked in top bending type (compression bending) neutral axis in about 1/3 from the outer wall, the rotating bending (bend), neutral axis in two-thirds from the outer wall.Therefore, it is beneficial to use the method of rotary bending for thin-wall pipe bending.

3. The precision of the bending tire is also one of the factors influencing the quality of steel bending pipe.In the manufacture of bending tire, we require the user to select the corresponding bending tire according to the bending pipe diameter while the specification and size are controlled within a certain tolerance range.

4. The bending performance and surface corrosion of the pipe itself may also affect the quality of steel pipe bending.In the field construction, the operator also needs to know the material of the pipeline being processed, the processing performance and the production judgment of the surface corrosion.

5. R is provided now.(bending radius/outside diameter) curve diagram for users to select the relationship between pipe diameter and wall thickness.It reflects the influence of relative bending radius and relative wall thickness on the quality of steel bending pipe. According to the acceptance specifications of pipeline processing, cold bending steel pipe is 4D, medium and low pressure is 4D, and high pressure is 5D.We bend tire design for R = 4 d (special another case may be), so in terms of my factory production of steel pipe bending machine mainly choose the relative wall thickness SX, the upper part of the figure is no core shaft area, central figure for the common core shaft, the lower part of the figure as a special core shaft section.Because of the special core shaft design and manufacture are very difficult, the operation is not very convenient, so general factory does not supply.Special circumstances may be agreed upon separately.

6. Influence of lubrication on product quality during molding:

Enterprises in the traditional steel pipe production process, to get better surface quality of the steel pipe bending, will take a lot of ways, including: adopting more advanced steel pipe bending machine, with higher strength of mould, or use the way such as lubricant.Using steel pipe bender and high strength of the mold, companies often need to be a very big money to complete, only the steel pipe bending lubrication products is relatively cheap and quick to enterprise product quality requirements.But in the traditional production process, oil-based steel pipe bending lubrication products can satisfy the business enterprise in the quality of steel pipe in steel pipe production requirements, but oil steel pipe bending of lubricant is not easy to clean and pollution to the environment is very prominent, so that enterprises must adopt more means to eliminate because lubrication oil steel pipe products impact on the quality of the final product, putting in more effort and money.And IRMCO steel pipe bending the arrival of the water-based lubricant is to satisfy the requirement for the quality of steel pipe products, and can avoid and reduce the enterprise because the lubrication oil steel pipe products and increase the investment, optimize enterprise production process completely.

In the process of traditional oil-based lubricant products application, the enterprise the production efficiency is greatly restricted, because oil-based lubricant products and very difficult to cleaning liquid, more caused the pollution of production environment and working conditions for workers, enterprises to clear these pollution often need to spend a lot of money and manpower.The adoption can reduce or even avoid the above human and material costs of cleaning pollution for the enterprise, its features of no-washing and direct welding can greatly improve the production efficiency and product quality of the enterprise.However, the amount of IRMCO water-based steel elbow grease can usually be reduced by 50-80% compared with traditional lubricating oil, which can save enterprises more costs.