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Bulging draw forming method for variable-camber half flat tube part

A technology of variable curvature and parts, applied in the field of aircraft manufacturing, to avoid cracking, improve mold clamping accuracy and reliability, and solve the effects of springback and wrinkling

Active Publication Date: 2015-03-25
XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the defects in the traditional method of manufacturing large bending radius plates and variable curvature semi-flat tubes, the purpose of this application is to provide a bulging deep drawing method and a forming die

Method used

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  • Bulging draw forming method for variable-camber half flat tube part
  • Bulging draw forming method for variable-camber half flat tube part
  • Bulging draw forming method for variable-camber half flat tube part

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Embodiment Construction

[0017] See attached picture, figure 1 Shown is the known theoretical model 1 of variable curvature semi-flat tube parts. Firstly, according to the theoretical model of the part, the process model of the bulging and deep drawing forming of the part is established, such as figure 2 As shown, the process model extends the bending line 2 on both sides of the theoretical model 1 of the part and the end line 3 at both ends and performs process compensation to make it a cavity with a rounded process compensation end 4. The bottom surface of the cavity is Annular flange edge 5, the flange edge 5 is kept parallel to the flange line 2 of theoretical model 1; then the unfolded wool material for part processing is made according to the process model; the expanded wool material is estimated based on the principle that the wool material before and after forming is equal to the surface area of ​​the part, and the expanded wool material and the part surface area are equal The outer contour ...

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Abstract

The invention provides a bulging draw forming method for a variable-camber half flat tube part. A process model for bulging draw forming of the part is set up according to a theoretical model of the part, the process model is used for carrying out process compensation on the theoretical model of the part to enable the theoretical model to become a cavity with a circular bead process end, an annular flange edge is arranged on the bottom face of the cavity, unfolded blank materials and a bulging draw forming die for part machining are manufactured according to the process model, and the plate blank materials to be formed are subjected to pressing and draw forming under the effect of external force.

Description

technical field [0001] This application relates to the field of aircraft manufacturing, sheet metal parts deep-drawing forming technology, specifically a method of deep-drawing and forming of semi-flat tube parts with variable curvature, especially suitable for bulging and deep-drawing of variable-curvature semi-flat tube parts with large bending radius take shape. Background technique [0002] In the field of aircraft parts manufacturing, the springback of plate parts with large bending radius has always been a major problem in production; especially the manufacture of semi-flat tube parts with variable curvature and requirements for butt seam welding is very difficult. The reason is that due to the large bending radius, the deformation of the material is almost in the elastic deformation stage, resulting in the phenomenon that the springback does not stick to the mold after unloading, and the thickness direction of the material is unstable due to the deformation of the con...

Claims

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Application Information

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IPC IPC(8): B21D22/22B21D37/10
CPCB21D22/22B21D37/10
Inventor 倪兴屹彭永前邱超斌张小平叶红惠小鹏
Owner XIAN AIRCRAFT BRANCH OF XIAN AIRCRAFT INT
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