Shorten the longer fiber and lengthen the shorter fiber, and finally make the fiber lengths of all layers tend to be consistent or reach the fiber length we require, so as to eliminate the deformation or reduce the deformation to a specified range.

In the process of field use, various correction methods should be selected according to the structural characteristics, deformation form and workpiece size of its components, and a comprehensive correction method combining multiple correction forms should be adopted when necessary.

Among them, flame correction is the most widely used method, which has the best effect on the deformation correction of large-scale components and high-strength components, but it is also a difficult correction method, such as improper heating position, temperature control and cooling mode, which will cause new and greater deformation of components and even lead to product scrapping. Therefore, flame straightener should not only have rich practical experience, but also master the heat treatment performance of aluminum alloy.