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A Method for Selecting Measurement Points of Aircraft Wing Skeleton Shape

A technology for measuring points and skeletons, applied in aircraft assembly, aircraft parts, ground devices, etc., can solve problems that have not yet been solved, achieve the effect of reducing the number of selections and improving measurement efficiency

Active Publication Date: 2022-04-08
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • A Method for Selecting Measurement Points of Aircraft Wing Skeleton Shape
  • A Method for Selecting Measurement Points of Aircraft Wing Skeleton Shape
  • A Method for Selecting Measurement Points of Aircraft Wing Skeleton Shape

Examples

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Embodiment 1

[0037] A method for selecting measurement points for the shape of an aircraft wing frame, comprising the steps of:

[0038] Step 1. Establish the wing skeleton shape spline model;

[0039] Step 2. Extracting the normal vector direction of the point on the spline;

[0040] Step 3. Judging and supplementing according to the spline fitting accuracy;

[0041] Step 4. Obtain the set of measurement points on the outline surface of the skeleton.

[0042] The method for selecting measurement points for the outline of an aircraft wing frame proposed by the present invention can reduce the number of selected measurement points on the premise of ensuring fitting accuracy, thereby improving measurement efficiency. It can be popularized and applied to other parts that require gap value measurement in the aircraft assembly process.

Embodiment 2

[0044] A method for selecting measurement points for the shape of an aircraft wing skeleton, mainly comprising: establishing a spline model of the shape of the wing skeleton, extracting the normal vector direction of points on the spline, judging and supplementing according to the fitting accuracy of the spline, and calculating the shape of the skeleton There are four steps for measuring point collection.

[0045] In the establishment of the wing skeleton 1, calculate the thickness of the skeleton in the A direction, take the 1 / 2 thickness as the thickness section 2, and then project the skeleton part 3 on the thickness section 2, and the surface formed by the projection and the skin assembly surface The intersection line is the required intersection line 5.

[0046] The extraction of the normal vector direction of the point on the spline is based on the following steps:

[0047] 1) Extract the first and last points of the first intersecting line 5 to form a point set M a1 ;...

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Abstract

The application belongs to the technical field of aircraft manufacturing, and in particular relates to a method for selecting a measurement point for the shape of an aircraft wing frame, which includes the following steps: Step 1. Establish a spline model of the shape of the wing frame; Step 2. Method for measuring points on the spline Extract the vector direction; Step 3. Determine and supplement according to the spline fitting accuracy; Step 4. Find the set of measurement points on the skeleton shape surface. The method for selecting measurement points for the shape of an aircraft wing frame proposed by the invention can reduce the number of measurement points selected under the premise of ensuring fitting accuracy, thereby improving measurement efficiency. It can be extended and applied to other parts that have clearance value measurement requirements in the process of aircraft assembly.

Description

technical field [0001] The application belongs to the technical field of aircraft manufacturing, and in particular relates to a method for selecting measurement points of an aircraft wing skeleton profile. Background technique [0002] The assembly and connection of the aircraft wing skeleton and the outer skin is a key step in the assembly process of the aircraft wing. Since the skeleton is composed of multiple frame and beam parts, there are differences between the assembled skeleton surface and the theoretical model of the skeleton assembly. At the same time, the skin installed on the skeleton is manufactured according to the theoretical digital model. Due to the manufacturing error and assembly error of the skeleton parts and the manufacturing error of the skin, it is necessary to measure the distance between the aircraft wing skeleton and the outer skin when installing the skeleton and the skin. According to the different gaps of different measurement positions, pad or ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B64F5/10B64F5/00
CPCB64F5/10B64F5/00
Inventor 陈代鑫周力蔡怀阳刘爱明杨春韩利亚
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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