Process utilizing upper flat and lower V-shaped anvil to forge stepped shafts

Abstract

The invention relates to a process for forging stepped shafts, in particular to a process utilizing an upper flat and lower V-shaped anvil to forge stepped shafts. The method utilizing the upper flat and lower V-shaped anvil to forge the stepped shafts includes the following steps of rotating a blank by 45 degrees once the anvil is pressed, rotating the blank by 180 degrees at each step including four times of pressing of the anvil, and finally rotating the blank by 360 degrees in each cycle including two steps. The process has the advantages that a deformation area of a forged part has fine stress states, a center area of the forged part has excellent forge penetration, the offset of the axis of the deforming portion is low, the internal stress of the blank is fine, no tensile stress is applied to the transverse direction, and center compaction is facilitated.

Description

technical field [0001] The invention relates to a method for forging a stepped shaft, in particular to a process method for forging a stepped shaft with an upper flat and a lower V anvil. Background technique [0002] There are two methods of forging round shaft forgings on a hydraulic press: the flat anvil is drawn and then rounded, and the type anvil is directly drawn and lengthened. The commonly used methods for drawing the elongate axis of the shaped anvil include drawing the length of the upper and lower type anvils, and drawing the length of the upper and lower V-shaped anvils. When forging stepped shaft forgings, if the difference in the diameter of the steps is large, the upper and lower anvils are used to pull out longer, and the upper anvil needs to be replaced during forging, which will prolong the forging time, affect the forging temperature, and even increase the number of heating times; if the upper and lower V-shaped The anvil is long, no need to replace the ...

AI Technical Summary

Problems solved by technology

When forging stepped shaft forgings, if the difference in the diameter of the steps is large, the upper and lower anvils are used to pull out longer, and the upper anvil needs to be replaced during forging, which will prolong the forging time, affect the forging temperature, and even increase the number of heating times; if the upper and lower V-shaped The anvil is long, no need to replace the upper anvil, and the forging time is shortened, but in general, the maximum deformation zone is not in the center of the billet during forging, and the forging performance is relatively poor, and the billet is constantly turned during forging, which makes the forging axis deviate greatly after forging , difficult to correct

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