Main features of pipe bending machine

1. The pipe bending machine adopts a touch screen and CNC module, with dialogue style operation and simple and easy program setting;

2. The bed structure is stable and not easily deformed;

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

4. Equipped with slow positioning function, stable bending angle, and repeatability accuracy of ± 0.1 °;

5. Error messages are displayed on the screen to assist the operator in immediately troubleshooting;

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

In terms of craftsmanship

The bending of pipes by a pipe bending machine is the same as the bending of sheet metal. In the case of pure bending, when a pipe with outer diameter D and wall thickness t is bent under the action of an external force moment M, the outer wall of the neutral layer is subjected to tensile stress σ 1. The effect is to thin the pipe wall; Tensile stress on the inner wall of the neutral layer σ 1. The action thickens the pipe wall. Moreover, the shape of the cross-section changes from circular to approximately elliptical due to the combined forces F1 and F2. When the deformation is too large, cracks will appear on the outer pipe wall and wrinkles will appear on the inner pipe wall.

The degree of deformation of pipes depends on the values of relative bending radius R/D and relative thickness t/D. The smaller the R/D and t/D values, the greater the degree of deformation. To ensure the quality of pipe forming, the degree of deformation should be controlled within the allowable range. The bending and forming of pipes not only depends on the mechanical properties and bending methods of the material, but also considers the usage requirements of the pipe fittings. The forming of pipe fittings should include the following contents:

1) Rupture occurs when the elongation deformation inside the tensile deformation zone on the outer side of the neutral layer does not exceed the allowable plastic value of the material;

2) Within the compression deformation zone on the inner side of the neutral layer, the thin-walled structural parts subjected to tangential compressive stress shall not exceed instability and wrinkle;

3) If there is a requirement for ellipticity in the pipe fittings, control the distortion of their cross-section;

4) If the pipe fittings have strength requirements to withstand internal pressure, control the thinning of their wall thickness during forming.