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Quick design method for three-dimensional chemical milling template

A design method and template technology, applied in the direction of design optimization/simulation, special data processing application, geometric CAD, etc., can solve the problems of long development cycle of three-dimensional milling template, inability to meet the production requirements, and prone to quality problems, so as to shorten the time Development cycle, improve design quality, rapid design effect

Active Publication Date: 2021-02-02
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The three-dimensional milling template is used for chemical corrosion forming, and it is widely used in parts such as aircraft skins. The traditional three-dimensional milling template design adopts analog design and manual trimming and manufacturing. With the improvement of the accuracy and quality of aircraft parts, this The method cannot meet the needs of today's generation, so the use of digital quantity transmission and numerical control manufacturing has become a trend in the development of three-dimensional milling prototypes
[0003] At present, the design of three-dimensional milling templates is mainly completed by designers through CAD software. The operation process is cumbersome and prone to quality problems, and it also results in a long development cycle for three-dimensional milling templates.

Method used

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  • Quick design method for three-dimensional chemical milling template
  • Quick design method for three-dimensional chemical milling template
  • Quick design method for three-dimensional chemical milling template

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A three-dimensional milling template rapid design method, including structure tree generation, three-dimensional milling template modeling, three-dimensional milling template detection; said structure tree generation is used to generate assembly nodes, part nodes, standard parts nodes in CATIA, And input corresponding material, standard part information; Described three-dimensional milling sample model modeling includes model profile design, model lug design, model stiffener design that carry out successively, and described model ear piece design is based on the hole axis of mold hole and model plate The intersection point of the main surface is obtained by projecting the projection point on the edge of the main surface, and then the ear curve is generated, and the ear surface is cut to establish the ear surface.

[0035] The invention is a knowledge-based, normalized, standardized and parametric design method, which can effectively improve the design quality and prevent...

Embodiment 2

[0037] This embodiment is optimized on the basis of Embodiment 1, using the mold hole to generate the hole axis A, using the mold film surface S to intersect the hole axis A in space to form a point B, and point B forms a point on the edge of the main curved surface of the projection model C; through the point command, point D and point F, which are 30-40mm away from point C, are formed on the edge line L of the main surface of the template; the edge line L of the main surface is cut through point D and point E to form a curve DE; the curve DE is on the mold film surface S is equidistantly translated by 40mm to form a curve FG; connect the 4 endpoints of the curve DE and curve FG to form a wireframe H; project the wireframe H onto the mold film surface S to form a new wireframe M; use the wireframe M to cut the mold The surface S of the film is obtained to obtain the surface of the ear piece of the three-dimensional milling model.

[0038] Other parts of this embodiment are th...

Embodiment 3

[0040] This embodiment is optimized on the basis of Embodiment 1 or 2. In the model surface design, according to the product outline, the mold surface is cut to obtain the model main surface; according to the chemical milling allowance line, the model main surface is Execute the chemical milling area.

[0041] Further, such as figure 2 As shown, the establishment formula of the chemical milling allowance line is as follows:

[0042] The formula for one-time chemical milling is:

[0043] B=c×b

[0044] The calculation formula of secondary chemical milling is:

[0045]

[0046] Among them, B is the width of chemical milling allowance;

[0047] c is the corrosion coefficient;

[0048] a is the depth of secondary chemical milling;

[0049] b is a chemical milling depth.

[0050] Other parts of this embodiment are the same as those of Embodiment 1 or 2 above, so details are not repeated here.

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Abstract

The invention discloses a rapid design method for a three-dimensional chemical milling template. The method comprises the steps: structure tree generation, three-dimensional chemical milling templatemodeling and three-dimensional chemical milling template detection. The structure tree generation is used for generating final assembly nodes, part nodes and standard component nodes in a CATIA and inputting corresponding material and standard component information; and the three-dimensional milling template modeling comprises template profile design, template ear-flake design and template reinforcing rib design which are carried out in sequence, the template ear-flake design obtains projection points on the edge line of a projection main body curved surface according to the intersection pointof the hole axis of a mold hole and the template main body curved surface, then an ear-flake curve is generated, an ear-flake curved surface is cut, and the ear-flake curved surface is established. The method realizes rapid design of the three-dimensional chemical milling template, and therefore the development period of the three-dimensional chemical milling template is shortened.

Description

technical field [0001] The invention belongs to the technical field of digital manufacturing, and in particular relates to a rapid design method for a three-dimensional milling template. Background technique [0002] The three-dimensional milling template is used for chemical corrosion forming, and it is widely used in parts such as aircraft skins. The traditional three-dimensional milling template design adopts analog design and manual trimming and manufacturing. With the improvement of the accuracy and quality of aircraft parts, this The method cannot meet the current production needs, so the use of digital quantity transmission and numerical control manufacturing has become the trend in the development of three-dimensional milling prototypes. [0003] At present, the design of three-dimensional milling templates is mainly completed by designers through CAD software. The operation process is cumbersome and prone to quality problems, and it also results in a long developmen...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F30/15G06F30/20
CPCG06F30/17G06F30/15G06F30/20
Inventor 贾俊杰王强邱晓宇胡植麟刘坤
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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