The bending of pipe fittings is the same as the bending of thick plates
The bending of pipe fittings in a pipe bending machine is the same as that of thick plates. When pure bending occurs, the diameter is D. When a water pipe with a thickness of t is bent, the thickness on both sides of the neutral layer is affected by tensile stress σ 1. Function, the thickness becomes softer; The influence of tensile stress on the inner and outer wall thickness of the neutral layer σ 1 function, thickening of thickness. In addition, due to the influence of collaborative forces, the appearance of the cross-section is also the same. The function of F1 and F2 has changed from circular to elliptical. When the shape changes too much, the wall thickness on both sides will cause cracks, and the inner wall thickness will wrinkle.
The deformation level of pipe fittings depends on the relative bending R/D and relative thickness t/D values during the semi menstrual period. The lower the R/D and t/D values, the greater the level of expression of deformation. To ensure the quality of pipeline shape, it is necessary to operate the deformation level within the approved range. The bending thinning rate of pipe fittings depends not only on the physical properties and bending methods of the raw materials, but also on the application regulations of the pipeline.
The thinning rate of pipelines should include the following content:
1) The larger length deformation in the tensile deformation area on both sides of the neutral layer does not exceed the plastic deformation control value of the raw material and fractures;
2) Within the reduced deformation area on the inner side of the neutral layer, some thick walled structures with tangential compressive stress will not wrinkle beyond the imbalance;
3) When there is an elliptical regulation for pipelines, manipulating the longitudinal and transverse sections can lead to deformation;
4) If the pipeline has compressive strength to withstand internal working pressure, manipulate the thinning rate of its thickness reduction.
Pipe bending machine is a common equipment in people's daily life. The key is to bend a certain piece of sheet metal, reduce the labor cost of traditional methods, and further improve work efficiency.
The key to a pipe bending machine is that everyone needs to bend the sheet metal of a certain block for a long time, which is not as aesthetically pleasing as equipment production. Therefore, the development and design of pipe bending machine products can make the sheet metal bending of the block more aesthetically pleasing. Pipe bending machine products are indispensable in our daily life, such as the office seats in the company where we work, if there are any curved areas.