Stretching of aluminum alloy plate
During the quenching process, due to the temperature gradient of the surface layer and the center layer of the aluminum alloy aluminum sheet, a large internal residual stress is generated, and the purpose of the stretching treatment is through the longitudinal permanent deformation, the internal stress balance system of the resume, the largest The residual stress of the quenching of the alloy aluminum sheet is eliminated to the limit, the dimensional stability is improved, and the processing performance is improved. The method is to subject the alloy aluminum sheet to the longitudinal stretching process for permanent deformation after the quenching and the aging treatment. The amount of the sheet produced by this process is called an aluminum alloy tensile sheet.
Working process of aluminum alloy sheet stretching
On the stretching machine, the two ends of the quenched aluminum alloy aluminum plate are placed in the nip of the joint; after the strong holding, the load is straightened, and then the tensile plastic deformation stage of the plate is reached to reach the set stretching. After the amount, the end of the stretching process can be uninstalled. According to the stress-strain curve, the plastic deformation contains a certain elastic deformation, so it is necessary to take into account the elastic deformation during the stretching process. For different alloys and different specifications, the predetermined amount of stretching is different. The stretching machine called the Emperor is mainly set by empirical operation. In addition, the stretching speed is one of the important elements to ensure uniform deformation of various parts of the sheet. The uniformity of the clamping of each of the two ports of the plate also directly affects the effect of uniform deformation and final stress relief.