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A large arc-shaped forging billet forming forging method

A forging billet and arc-shaped technology, which is applied in the field of forming forging with precise control of the bending radian of large-scale arc-shaped forging billets, can solve the problems of forging structure and performance degradation, heating, and long heating time of large forgings, so as to improve the stability of structure performance and reduce The effect of forging fire times

Active Publication Date: 2017-01-04
SHAANXI HONGYUAN AVIATION FORGING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many methods for forming curved arc forgings, but most of them cannot accurately control the curved arc size of the forging billet, resulting in repeated heating and bending of the forging billet
The bending forming forging billet is heated by air firing, and the heating time of large forgings is long, and the heating times will lead to the decline of the structure and performance of the forgings

Method used

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  • A large arc-shaped forging billet forming forging method
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  • A large arc-shaped forging billet forming forging method

Examples

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Effect test

Embodiment 1

[0022] Example 1: Forging material: TC18, phase transition point 875°C, quantity: 2 pieces, forging blank thickness: 300mm, bending arc angle: R2699, blanking weight, 1850Kg.

[0023] Step 1: Membrane production

[0024] The lower surface of the upper membrane 1 is an arc-shaped boss with a width A of 300mm, an arc of R2699mm, and a length of 300mm; a dovetail keyway is made on the upper surface of the upper membrane 1 with a height of 350mm. The cavity of the lower membrane 3 is a trapezoidal groove 4 with the same cross section, and the width of the lower membrane 3 is 450°; is α, the acute angle formed by its long side and the plane where the bottom surface of the trapezoidal groove 4 is located is β, and the angles of α and β are respectively 39° and 37°; the height of the short side of the trapezoidal groove 4 is 150mm lower than the long side, and the upper opening The width is 1270mm; the width of the bottom surface of the trapezoidal groove 4 is 340mm, and the maximum...

Embodiment 2

[0039] Forging material: TC8, phase transition point 878°C, quantity: 3 pieces, forging billet thickness: 280mm, bending arc angle: R2585, blanking weight, 1550Kg.

[0040] Step 1: Membrane production

[0041] The lower surface of the upper membrane 1 is an arc-shaped boss, the width A of the boss is 280mm, the radian is R2585mm, and the length is 300mm; a dovetail keyway is made on the upper surface of the upper membrane 1, and the height dimension is 350mm. The cavity of the lower membrane 3 is a trapezoidal groove 4 with the same cross section, and the width of the lower membrane 3 is 450°; is α, the acute angle formed by its long side and the plane where the bottom surface of the trapezoidal groove 4 is located is β, and the angles of α and β are respectively 37° and 35°; The width is 1270mm; the width of the bottom surface of the trapezoidal groove 4 is 300mm, and the maximum height of the lower membrane 3 is 650mm.

[0042] Step 2: Forging a suitable elongated forging ...

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Abstract

The invention belongs to a forging method, and relates to a molding and forging method for precisely controlling a bend radian of a large arched forging stock. The free forging and the moulding bed forging are skillfully combined; a forging stock is put between an upper moulding bed (1) having a circular arc boss and a lower moulding bed (2) with a cavity as a trapezoidal groove (4); a forging hammer drives the upper moulding bed (1) to be bent and forged to a bent point of downwards pressing the forging stock (2); when the forging stock (2) is contacted with the lower surface of the trapezoidal groove (4), the bending and the forging are finished; and the heights of the short edge and the long edge of the trapezoidal groove (4) of the lower moulding bed (2) are determined according to the needed bent radian and length of the forging stock. The bending and the molding of the arched forging stock are realized through the moulding beds; the bent radian size of the large arched forging stock is precisely controlled; the forging heating number is reduced; and the structure performance stability of the large forging stock is improved.

Description

technical field [0001] The invention belongs to a forging method, and relates to a forming forging method for precisely controlling the bending radian of a large arc-shaped forging billet. Background technique [0002] With the development of large-scale and integrated domestic aircraft, in order to further tap the potential of the aircraft and improve the performance of the aircraft, it is necessary to do everything possible to reduce the weight of each gram and reduce the connecting parts. There are more and more large-scale overall forgings, especially for aircraft structures. A large arc-shaped overall frame forging produced according to the shape of the aircraft. The streamlined requirements of other industries have also produced curved forgings. Since the forgings formed by bending are distributed along the shape of the parts, the plasticity of the material is greatly improved, the structure is more uniform, and the continuity of the streamlines in the length directio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/00B21J13/02
Inventor 冀胜利刘珂妮秦卫东薛强郑建新
Owner SHAANXI HONGYUAN AVIATION FORGING
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