What is the use aluminum sheet die Removal cold stress is the principle?
In addition, in view of the aluminum alloy forgings already had a large presence of residual stress may cause excessive deformation of the molded work hardening, crack and fracture; deformed too small to eliminate the stress of poor results, so the limitations of this kind of approach in practice, is the difficult to precisely control the amount of deformation of the molding.
Therefore, this method is not adjusted to eliminate the overall stress level of parts, it makes the residual stress on certain parts of the aluminum alloy forgings obtained simultaneous release, it is possible to make other parts of the residual stress increases.
In fact, "molded" This is called imprecise, because its main mechanism of action is to make the aluminum alloy die forgings by local material "stretch" or "compression" effect. When sizing die pressing, finishing punch embedded aluminum forgings end face, the upper edge (rib) of the draft angle, so that the web is actually part of die forgings have a "stretch" effect.
Cold molding process is in a special finishing mold, limited by strict control of cold shaping to eliminate complex shape of aluminum alloy forgings residual stress.
