Accurate continuous bending method of U-shaped large forging

Abstract

The invention discloses an accurate continuous bending method of a U-shaped large forging. The method is realized through an arc-shaped inlet female mold, a male mold matched with the female mold, and a back pressure mold with a bent guiding plate. The method comprises the following steps: heating a forging blank to perform preforging; performing back pressure trimming; performing residual heat accurate positioning; enabling the bent guiding plate to drive the bent part of the forging to move and be bent along the arc-shaped track of a female mold inlet, and the like. The method has the advantages that the surface of the bent part is high in quality and small in damage, and the symmetry of the forging is high.

Description

technical field [0001] The invention relates to a bending method of a large forging, in particular to an accurate continuous bending method capable of improving the dimensional accuracy and surface quality of a U-shaped large forging. Background technique [0002] The bending forming process is still a major problem restricting the bending production of high-quality large forgings. During the bending deformation process of U-shaped large forgings, it is very easy to cause sudden changes in load, severe thinning of the deformation zone, large scratches on the surface of the forging, and poor symmetry of the U-shaped bending arm. The overall quality of the forging is low, which is likely to cause safety hazards. The mainstream technology uses general-purpose equipment for bending pre-forming supplemented by cold / hot correction processes or purchases expensive special bending machines to avoid this technical problem, resulting in lengthy process routes and greatly increased pro...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a U-shaped large forging bending processing method that can be implemented on general-purpose forging equipment to overcome the sudden change in forming load, excessive abrasion of the contact area between the forging and the die and the forging in the prior art. poor symmetry problem

Images