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Precise hot forming method for metal forgings with nearly semi-elliptical thin web and large rib spacing

A semi-elliptical, thin-web technology, applied in the field of warm forging, can solve problems such as rib folding, partial filling of metal components, and high production costs

Active Publication Date: 2021-09-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention aims to solve the problems that the metal components of the existing special-shaped profile web with large rib spacing are not partially filled, the ribs are folded, the production cost is high, and the mold life is low, and a nearly semi-elliptical thin web with rib spacing is provided. Precision hot forming method for large metal forgings

Method used

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  • Precise hot forming method for metal forgings with nearly semi-elliptical thin web and large rib spacing
  • Precise hot forming method for metal forgings with nearly semi-elliptical thin web and large rib spacing
  • Precise hot forming method for metal forgings with nearly semi-elliptical thin web and large rib spacing

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specific Embodiment approach 1

[0037] Specific Embodiment 1: A method for precision hot forming of metal forgings with a nearly semi-elliptical thin web and large rib spacing described in this embodiment. The metal forging with a nearly semi-elliptical thin web and large rib spacing is It is prepared from a crescent-shaped blank, and the specific preparation method is carried out according to the following steps:

[0038] 1. Preparation of preform:

[0039] Machining thick metal plates of equal thickness into crescent-shaped blanks to obtain preforms;

[0040] The shape of the crescent-shaped blank is different from that of the metal forging; the metal forging is a metal forging with a nearly semi-elliptical thin web and large rib spacing;

[0041] The web of the metal forging is a nearly semi-elliptical shape symmetrical to the left and right along the central axis, and the left and right ends of the nearly semi-elliptical shape are arc-shaped. The webs have the same shape; the aspect ratio of the web is...

specific Embodiment approach 2

[0059] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the material of the equal-thickness metal plate described in step 1 is aluminum alloy; the upper and lower surface contour edges of the crescent-shaped blank described in Step 1 are reversed Fillet processing, the radius of the fillet obtained by the rounding treatment is 1 / 6 to 1 / 3 of the thickness of the preform. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0060] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that: the aluminum alloy is a 2XXX series aluminum-lithium alloy. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to a precision hot forming method for a metal forging with a nearly semi-elliptical thin web and large rib spacing, and the invention belongs to the field of isothermal forging. The invention aims to solve the problems that the existing special-shaped contour webs and large rib spacing metal components are not partially filled, the ribs are folded, the production cost is high, and the mold life is low. Methods: 1. Prefabricated blank; 2. Preforming; 3. Repairing damage from mold; 4. Final forming; 5. Heat treatment after forging. The invention is used for precision hot forming of metal forgings with nearly semi-elliptical thin webs and large rib spacing.

Description

technical field [0001] The invention belongs to the field of isothermal forging. Background technique [0002] In order to pursue faster speed, higher agility and lower cost of aerospace vehicles, the modern aerospace industry pays more and more attention to the lightweight research of components. The members with special-shaped profile web and large rib spacing are a kind of products with lightweight structure design. They are produced by traditional thick plate machining methods. The filling speed of each part of the forging is uneven, and the filling at the end is not enough, and it will cause a certain degree of waste of material; adopting the one-step forging forming method, because a large amount of blanks at the web flow to the flash, folding defects will occur on the ribs of the forging, At the same time, it will increase the forming load and reduce the life of the die. Contents of the invention [0003] The present invention aims to solve the problems that the m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21J5/02B21J5/00C21D1/18C21D9/00
CPCB21J5/002B21J5/02C21D1/18C21D9/0068
Inventor 宗影影王琪伟万升祥邵斌单德彬郭斌徐福昌
Owner HARBIN INST OF TECH
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