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A method for judging the drawing limit of plate-made box-shaped parts

A determination method and technology for box-shaped parts, which are applied in manufacturing tools, instruments, electrical and digital data processing, etc., can solve problems such as uneven distribution of force on materials, wrinkling on the surface of parts, and uneven distribution of deformation

Active Publication Date: 2018-07-24
XI'AN AIRCRAFT INTERNATIONAL
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The complexity of the box-shaped part structure leads to uneven force distribution, uneven deformation distribution, and uneven deformation speed of the material during the deep-drawing forming process, resulting in various defects such as wrinkling, cracking, and springback on the surface of the part.

Method used

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  • A method for judging the drawing limit of plate-made box-shaped parts
  • A method for judging the drawing limit of plate-made box-shaped parts
  • A method for judging the drawing limit of plate-made box-shaped parts

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Embodiment Construction

[0047] Such as Figure 1-8 As shown, a method for determining the drawing limit of a plate box-shaped part includes the following steps:

[0048] Step 1: Determine the relative thickness C of the wool of the box-shaped piece δ = δ / D 0

[0049] Step 1-1: Use CAD software to extract the geometric information of the box-shaped part, and decompose the box-shaped part into web area 1, web fillet area 2, side wall area 3, flange area 6 and flange fillet For the fifth part of zone 5, the thickness of the material is measured as δ, and the diameter of the wool is calculated as D 0

[0050] Step 1-2: Calculate the relative thickness C of the box-shaped piece wool according to the material thickness and wool diameter δ = δ / D 0 ;

[0051] Step 2: Determine the relative corner radius C of the box B

[0052] Step 2-1: Extract the intersection line L of web fillet area 2 and web area 1 WO , measure L WO For the distance between two opposite sides, take the smaller value as the bo...

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Abstract

The invention provides a plate-made box-shaped member deep drawing molding limit determination method, which comprises: 1, determining the relative thickness C<delta> of a box-shaped member billet material, wherein C<delta> is delta / D0; 2, determining the relative corner radius C of the box-shaped member; 3, determining the maximum height of the box-shaped member; 4, determining the maximum corner-to-height ratio Cmax<R> of the box-shaped member; determining the maximum relative height Cmax<H> of the box-shaped member; 6, determining the deep drawing coefficient m of the box-shaped member; 7, determining the type of the box-shaped member; and 8, according to the two different types such as the high box-shaped member and the low box-shaped member, respectively determining the molding limits. According to the present invention, with the determination method, the part molding defect is predicted in advance, the production cost is reduced, the development progress us accelerated, and the promotion is easily achieved.

Description

technical field [0001] The invention belongs to the technical field of aircraft manufacturing, and in particular relates to a method for judging the forming limit of a deep-drawn plate-like box-shaped part of an aircraft. Background technique [0002] Plate box-shaped parts are widely used in aircraft parts, and are classified as typical deep-drawn parts according to the processing method. Deep drawing refers to the pressing process of using a mold to apply force to a metal slab to make it a three-dimensional hollow part. The three-dimensional hollow part is formed by the contraction and flow of the material at the outer edge of the blank. The complexity of the box-shaped part structure leads to uneven force distribution, uneven deformation distribution, and uneven deformation speed of the material during the deep-drawing forming process, resulting in various defects such as wrinkling, cracking, and springback on the surface of the part. [0003] Modern aircraft manufacturi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21C51/00G06F17/50
CPCB21C51/00G06F30/17G06F30/20
Inventor 白颖韩艳彬程晓芳
Owner XI'AN AIRCRAFT INTERNATIONAL
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