Variable-arc surface bending die

Abstract

The invention discloses a variable-arc surface bending die. The variable-arc surface bending die comprises an upper die and a lower die, wherein one end of the upper die is an upper plane, and an upper arc surface which is connected with the upper plane is a preset shape. One end of the lower die is a lower plane matched with the upper plane, a lower arc surface which is connected with the lower plane is a preset shape, and the upper arc surface is separated from the circle center of the lower arc surface, so that a preset variable-arc surface space is formed after the upper die and the lowerdie are combined. According to the variable-arc surface bending die, the center position of the upper arc surface and the center position of lower arc surface are different, so that the preset variable-arc surface space is formed when the upper die and the lower mold die are combined, and thus the blank is formed into a preset variable-arc surface shape. The variable-arc-surface bending die is adopted, so that metal distribution in the final-pressing process of the subsequent raw blank forging is more reasonable. On the one hand, the defects of the folding and threading of forging are eliminated; and on the other hand, the stress load of the die is reduced, and the service life of the die is prolonged.

Description

technical field [0001] The invention relates to the technical field of forging, and more specifically, relates to a bending die with a variable arc surface. Background technique [0002] Arc-shaped parts play an extremely important role as core components in steam turbines, aviation industry, ships, petroleum and other fields. With the rapid development of the manufacturing industry, there are more and more arc-shaped parts, with complex shapes and structures, a wide variety, higher dimensional accuracy and surface quality requirements, and a stronger trend in mass production. The blanks of arc-shaped parts are generally formed by forging. [0003] Large-sized arc-shaped forgings are not uncommon in existing aviation forgings. The existing die forging process of such forgings uses the method of stacking large billets to form forgings. The result is that the flashing of forgings is extremely uneven and local Folding defects appear in many places, and serious flow-through de...

AI Technical Summary

Problems solved by technology

[0006] In view of this, the object of the present invention is to provide a variable-arc bending die, the structural design of which can effectively solve the problem of large-scale arc-shaped forgings with many defects and poor quality, and easily causing die damage.

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