Technological method for removing residual stress of arc-shaped forging

Abstract

The invention discloses a technological method for removing residual stress of an arc-shaped forging. The technological method comprises the step (1) of performing primary cold compression for a die forging; and the step (2) of performing secondary cold compression for the die forging. Through the above technological method, not only can the residual stress of the arc-shaped forging be removed, but also the operation difficulty is low; and the cost is low.

Description

technical field [0001] The invention relates to the technical field of aviation machinery, in particular to a process method for eliminating residual stress of arc-shaped forgings. Background technique [0002] Large T-section arc-shaped forgings are used as aircraft load-bearing structural parts, which are prone to deformation after quenching and have large residual stress, which will cause serious mechanical deformation during machining, so cold deformation is required to achieve the purpose of rectification and elimination of residual stress . [0003] At present, foreign countries generally use the method of profiling to eliminate residual stress, but large-scale stretching equipment is required, and the investment is large. In the absence of large-scale stretching equipment, when using a set of molds for cold compression of this type of forging, especially When compressing the rounded corners, the rounded corners are extremely sensitive to compression deformation, requ...

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Problems solved by technology

[0003] At present, foreign countries generally adopt the method of profiling to eliminate residual stress, but large-scale stretching equipment is required, and the investment is large. In the absence of large-scale stretching equipment, when using a set of molds for cold compression of this type of forging, especially When compressing the rounded corners, the rounded corners are extremely sensitive to compression deformation and require extremely high compression accuracy, which is difficult to control and prone to jamming. If the rounded corners are avoided, the stress at the intersection of the forgings will not be effective. Release, the effect of eliminating residual stress is extremely unsatisfactory

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