What are the processing schemes for elbow processing?

Elbow processing products include right-angle elbow, U-shaped elbow combination elbow, serpentine elbow coil, angle steel, channel steel, I-beam and so on. Elbow processing products include right-angle elbow, U-shaped elbow combination elbow, serpentine elbow coil, angle steel, channel steel, I-beam and so on. The elbow is bent by a complete set of bending dies. No matter what kind of mechanical equipment, most of them use elbow pipes, which are mainly used for oil, gas and infusion. , and plays a very important role in the aircraft and its engine. A pipe bending device is characterized by comprising a pipe bending disc and a special-shaped pipe; The forming pipe is inserted from the end of the steel pipe to be bent, and the end of the forming pipe is tapered and can resist the bending position of the steel pipe; The elbow disc is provided with a dial which can adjust the bending angle of the steel pipe.

The methods of pipe bending can be roughly divided into hydraulic pipe bender and numerical control pipe bender. Application of pipe bender: Hydraulic pipe bender is mainly used for laying and repairing pipelines such as public railway construction, electric power construction, boilers, furniture, decorative bridges and ships. It has the advantages of multiple functions, simple operation, convenient movement, quick installation and reasonable structure. This machine not only has the function of bending the pipe, but also can use the oil cylinder as a hydraulic jack. Compared with the CNC pipe bender, it has the characteristics of low price and convenient use, and occupies a leading position in the domestic pipe bender market. Numerical control pipe bender can bend pipes with one bending radius (single mode) or two bending radii (double mode) in cold state, which is widely used to bend various pipe fittings and wires in automobile, air conditioning and other industries. Pipe bender is mainly used for plastic forming of pipes.

1, bending usage

In pure bending, under the action of external force m, the outer arm wall of neutral layer is thinned by tensile stress and the inner side is compressed stress. The resultant forces N 1 and N2 change the cross section of the tube. Based on this factor, the main reasons for the decline of elbow quality are RX and SX. Therefore, the RX value and external thinning amount under each pressure level are clearly defined to control the values of RX and SX and ensure the quality.

2, elbow use method

As mentioned earlier, when bending, the position of the neutral axis of the external tension and internal pressure of the material is different from the bending mode. In top bending (pressure bending), the outer wall of neutral wheelbase is about 1/3, and in back bending (back bending), it is about 2/3. Therefore, it is beneficial to bend thin-walled tubes by rotary bending method.

3, elbow use method

The accuracy of elbow tire is also one of the factors that affect the quality of elbow. When we manufacture bent tires, we not only require the specifications and dimensions to be controlled within a certain tolerance range, but also require users to select the corresponding bent tires according to the diameter of the elbow when using them.

4, elbow use method

The bending performance and surface corrosion of the pipeline itself may also affect the quality of the elbow. In the field construction, the operator also needs to know the material and processing performance of the processed pipeline, and make a production judgment on the surface corrosion.

5, elbow usage

Reflect the influence of relative bending radius and relative wall thickness on elbow quality. According to the acceptance standard of pipeline processing, the middle and low pressure of cold-formed steel pipeline is 4D, and the high pressure is 5D. Therefore, our tube bender is designed as R=4D (special circumstances shall be determined separately), so the tube bender mainly chooses relative wall thickness SX, with no mandrel area at the upper part, ordinary mandrel area at the middle part and special mandrel area at the lower part.

6, elbow use method

Influence of lubrication on product quality in bending process;

In the application of traditional oil-based lubrication products, the production efficiency of enterprises is greatly restricted, because the fluidity and extremely difficult cleaning of oil-based lubrication products have caused pollution to the production environment and workers' working conditions, and enterprises often need a lot of money and manpower and material resources to remove these pollution. It can reduce or even eliminate the manpower and material resources of enterprises to clean up pollution, and can be directly welded without washing, which greatly improves the production efficiency and product quality of enterprises.