Springback compensation method for recess-free continuous bending edge in frame and rib part

A springback compensation and edge bending technology, applied in special data processing applications, instruments, electrical digital data processing, etc., can solve problems such as failure to meet design requirements and excessive compensation

Active Publication Date: 2015-12-23
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Compared with the common single flange of frame rib parts, two consecutive flanges will affect each other during the forming process. If the springback compensation is performed on the continuous flange according to the single flange springback compensation calculation method, it will lead to overcompensation , the bending angle after the part is formed is smaller than the bending angle of the designed part and does not meet the design requirements

Method used

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  • Springback compensation method for recess-free continuous bending edge in frame and rib part
  • Springback compensation method for recess-free continuous bending edge in frame and rib part
  • Springback compensation method for recess-free continuous bending edge in frame and rib part

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Embodiment Construction

[0049] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0050] by figure 1 Take the continuous bent frame rib part as an example, the part consists of web W, flange F 1 Composition, the part material is 2024-O, the part thickness is 1.4mm, the bending angle of the two flanges is 90°, and the bending outer radius is 4.4mm. The specific implementation process of the springback compensation of the non-sagging continuous flange of the frame rib part will be described below in conjunction with the accompanying drawings.

[0051] Step 1: Form the profile using the following steps

[00...

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Abstract

The invention provides a springback compensation method for a recess-free continuous bending edge in a frame and rib part, and belongs to the technical field of aircraft manufacturing. According to the method, the recess-free continuous bending edge of the frame and rib part is subjected to fractionated compensation, and a springback compensation correction coefficient of the continuous bending edge is determined, so that the problems that overcompensation is caused and a bending angle of the formed part is smaller than a designed bending angle of the part when the continuous bending edge is subjected to springback compensation with an existing springback compensation calculation method for a single bending edge can be solved; and accurate forming is realized through springback compensation calculation of the continuous bending edge.

Description

technical field [0001] The invention belongs to the technical field of aircraft manufacturing, and in particular relates to a springback compensation method for non-sagging continuous flanges in frame rib parts. Background technique [0002] Frame rib parts are the main parts of aircraft sheet metal parts. They are often used in wing ribs, fuselage bulkheads, etc. Bends are the main structural elements of frame rib parts. Most of the outer edge bends overlap with the skin, and the inner edge bends It plays a strengthening role. One type of flange is a continuous bending flange without sag, which is mostly located inside the frame rib part. The accuracy of its springback compensation determines its manufacturing accuracy. [0003] The Chinese patent with the publication number CN102982200A "A Process Model Design Method for Aircraft Frame Rib Rice Metal Parts" provides a method of using the bending line The intersection of the normal plane and the shape reference surface at ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 刘闯吴红兵路骐安
Owner NORTHWESTERN POLYTECHNICAL UNIV
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