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Method for judging structural rigidity of part based on static load deformation

A rigid and static load technology, applied in the field of mechanical processing, can solve the problem of lack of fast and effective judgment methods for the machinability of weakly rigid structures

Active Publication Date: 2020-11-10
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In order to solve the above problems, the present invention provides a method for judging the structural rigidity of parts based on static load deformation, which solves the problem of lack of a fast and effective method for judging the machinability of weakly rigid structures during the process design of machining parts

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  • Method for judging structural rigidity of part based on static load deformation
  • Method for judging structural rigidity of part based on static load deformation
  • Method for judging structural rigidity of part based on static load deformation

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Embodiment 1

[0035] A method for judging the structural rigidity of parts based on static load deformation, comprising the following steps:

[0036] A, set up the characteristic model of weakly rigid structure, described characteristic model is a square box body structure model, the top opening of described square box body;

[0037] b. Determine the area to be processed, the processing area is the edge structure of the four sides of the square box, and the edge structure includes the thickness A of the box, the height B of the box and the side length C of the box;

[0038] c. Find out the rigid weak points in the area to be processed by modal analysis method;

[0039] d. Design the orthogonal test of box body thickness A, box body height B and box body side length C through the number and parameters of geometric features;

[0040] e. Establish a finite element model;

[0041] f. In the orthogonal test, a static load is applied to the rigid weak point of the box thickness A, box height B ...

Embodiment 2

[0050] A method for judging the structural rigidity of parts based on static load deformation, comprising the following steps:

[0051] a. If Figures 1 to 5 As shown, a characteristic model of a weakly rigid structure is established. The characteristic model is a square box structure model. The upper opening of the square box is high and thin due to the high and thin edges around the box. Vibration is prone to occur during processing, and there is a process risk;

[0052] b. Determine the area to be processed, and analyze the geometric characteristic factors of the processing area. The processing area is the edge structure of the four sides of the square box body, and the edge structure includes the box body thickness A, the box body height B and the box body side length C;

[0053] c. Use the modal analysis method to find the rigid weak points in the area to be processed, and use the modal analysis method to find out the rigid weak points in the area to be processed;

[00...

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Abstract

The invention discloses a method for judging structural rigidity of a part based on static load deformation. The method comprises the following steps of a, establishing a characteristic model of a weak-rigidity structure; b, determining a to-be-machined area, wherein the machining area is of an edge strip structure on the four faces of a square box body; c, finding out rigid weak points of the to-be-machined area through a modal analysis method; d, designing an orthogonal test according to the number and parameters of the geometrical characteristics; e, establishing a finite element model; f,calculating the static load deformation of the rigid weak point through a finite element method; g, performing range analysis on the box body thickness A, the box body height B and the box body side length C through the orthogonal test; h, judging a static load deformation critical value through a machining test; i, judging whether the weak rigid structure is processed or not according to the static load deformation critical value 0.7. According to the present invention, the problem that a quick and effective judgment method for the machinability of the weak-rigidity structure is lacked in theprocess design of machining parts, is solved.

Description

technical field [0001] The invention belongs to the technical field of mechanical processing, and in particular relates to a method for judging the structural rigidity of parts based on static load deformation. Background technique [0002] At present, in the aerospace industry, machined parts with thin thickness and weak rigidity are prone to processing vibration during production and processing, which affects product quality and causes parts to be unprocessable. However, how to judge whether a structure can meet the requirements of machining is currently The factory mainly relies on the experience of the craftsmen. [0003] China Authorized Patent Announcement No.: CN106126778B discloses a method for predicting the stability of milling of thin-walled parts with curved surfaces, which is used to solve the technical problem of poor prediction accuracy of the existing methods for predicting the stability of milling of thin-walled parts. The technical solution is to combine t...

Claims

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Application Information

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IPC IPC(8): G01M5/00
CPCG01M5/0041
Inventor 陈雪梅骆金威叶翔宇陈清良潘雨冯若琪李栎森舒阳周裕力何鹏
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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