Are you looking for high-quality steel pipe that will provide exceptional performance? 

Tengdi Machinery is an excellent steel pipe making machine manufacturer with whom to explore collaborating. Tengdi provide a large selection of various steel pipe making machine choices that are intended to meet your unique requirements. We can be sure that you will get the finest steel pipe making line option for your needs. Tengdi collaborate with skilled specialists who contribute their years of experience and guarantee that all of our works meet the highest standards.

Erw Tube  Machine:

Pipe bending machines can be roughly divided into CNC pipe bending machines, hydraulic pipe bending machines and so on. It is mainly used in electric power construction, highway and railway construction, pipeline laying and repairing in boilers, bridges, ships, furniture, decoration, etc. It has the advantages of multiple functions, reasonable structure, and simple operation. In addition to the function of pipe bending, this machine can also use the oil cylinder as a hydraulic jack. Compared with CNC pipe bending equipment, it is cheap and easy to use. It occupies the leading product position in the domestic pipe bending machine market. [1]

Basic classification:

Hydraulic electric pipe bender

Horizontal hydraulic pipe bender

Multifunctional Rolling Tube Bender

Digital pipe bender

main feature

Structural aspect:

1. The pipe bending machine adopts a touch screen plus a numerical control module, which is interactively operated, and the program setting is simple and easy;

2. The bed structure is stable and not easy to deform;

3. Each file can set 16 bending angles, and the memory can store 16 sets of files;

4. Equipped with slow positioning function, the bending angle is stable, and the repetition accuracy reaches ±0.1°;

5. The error message is displayed on the screen to help the operator to eliminate it immediately;

6. Provide self-developed coordinate conversion bending pipe processing value, software can be purchased and installed on a desktop computer for editing and calculation.

Process:

The pipe bender performs the same bending of the pipe as the bending of the sheet. In the case of pure bending, when a pipe with an outer diameter D and a wall thickness t is bent by an external moment M, the outer wall of the neutral layer is subjected to a tensile stress σ1, and the wall becomes thinner; the inner wall of the neutral layer The wall is subjected to compressive stress σ1, and the pipe wall becomes thicker. Moreover, the shape of the cross section changes from circular to approximately elliptical due to the effect of the resultant forces F1 and F2. When the deformation is too large, cracks will occur on the outer tube wall and wrinkles will appear on the inner tube wall.

The degree of deformation of the pipe depends on the value of the relative bending radius R/D and relative thickness t/D. The smaller the value of R/D and t/D, the greater the degree of deformation. In order to ensure the forming quality of pipe fittings, the degree of deformation must be controlled within the allowable range. The bending forming limit of pipes not only depends on the mechanical properties and bending methods of materials, but also considers the use requirements of pipe fittings.

The forming limit of pipe fittings should include the following contents:

1) The maximum elongation deformation in the tensile deformation zone outside the neutral layer does not exceed the plastic allowable value of the material to cause rupture;

2) In the compressive deformation zone inside the neutral layer, the thin-walled structural part subjected to tangential compressive stress will not exceed the instability and wrinkle;

3) If the pipe fittings have requirements for ovality, control the distortion of their cross-section;

4) If the pipe fittings have strength requirements to withstand internal pressure, control the forming limit of its wall thickness reduction.