The role of aluminum plate straightener is to produce internal stress due to uneven extension during extrusion, quenching, rolling, leveling and other processing processes of plates and bars. When the value reaches a certain level, it will cause the shape of the plate to buckle or wave. The stretching straightener improves the shape of the plate by taking advantage of the existence of internal stress, stretching aluminum plates and bars through the stretching straightener to exceed the yield point of the product, resulting in permanent deformation, Eliminate internal stress to prevent secondary deformation. Its principle is to use the phenomenon that when the material is not straight, its longitudinal fibers must be uneven in length, and the uneven fibers are subject to plastic stretching to achieve equal length, and after removing the external force, they must recover to a stable state with basically equal elastic recovery to achieve the goal of straightening. The aluminum plate can no longer cause deformation after next processing or chemical milling. This equipment realizes the automatic control of stretching work, which can automatically relieve the pressure of the main hydraulic system. After setting the stretching amount, the stretching amount can automatically stop stretching during stretching. It basically realizes that there is no need for operator intervention under normal stretching conditions, making the stretching straightener simple to operate, powerful, stable, and so on. According to the above principles, the structural characteristics and technical parameters of the 8MN straightener designed by Minghong Machinery are as follows: 1: The structure of the 8MN straightener is mainly composed of the stretching head, mobile trolley, main stretching cylinder, frame, mobile beam, idler and support, and buffer device, as shown in the following figure:

6~80T Line External Straightener

100~300T online straightener

400T straightener

600T straightener

800T straightener

900T straightener - under production in the workshop

1200T straightener

1800T straightener

3000T straightener

2500T cooling bed 150T single person straightening machine

Shandong Nanshan 800T off-line straightening machine