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Method for determining position of composite curved surface ply laser projector

A technology of laser projectors and composite materials, which is applied to other household appliances, household appliances, household components, etc., to achieve the effect of improving precision and improving structural consistency

Active Publication Date: 2019-05-21
THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] The present invention aims at the problem of deviation of the projection position for the same mold and target position when the projection system is used for composite material layup positioning at present, by analyzing the composite material layup positioning principle and the generation of positioning errors, and by synthesizing the projection system and mold errors analysis, and propose a method to improve the projection accuracy of composite plies

Method used

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  • Method for determining position of composite curved surface ply laser projector
  • Method for determining position of composite curved surface ply laser projector
  • Method for determining position of composite curved surface ply laser projector

Examples

Experimental program
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example 1

[0108] Example 1 For the projection line, its location point coordinates and normal vectors are shown in Table 1.

[0109] Table 1 Projection location points and normal vectors

[0110]

[0111]

[0112]

[0113]

[0114]

[0115]

[0116]

[0117] Step 1, select the position coordinates and the normal vector of the projection point of the composite material layup, and calculate the center point P1 and the direction vector and R of the projection point;

[0118] The coordinates and vector sum R of the center point P1 of the projection line are

[0119]

[0120] Step 2, establish a straight line equation M1 passing through the center point P1 along the vector and R direction, starting from the center point, along the vector and direction, establish a point P2 at a certain distance from the starting point; for each projection point, establish a projection point and P 2 The equation of the straight line m 2 , to calculate the straight line m 2 and M 1...

example 2

[0151] Step 1, select the position coordinates and the normal vector of the projection point of the composite material layup, and calculate the center point P1 and the direction vector and R of the projection point;

[0152] The coordinates and vector sum R of the center point P1 of the projection line are and (e i , e y , e z )

[0153] Step 2, establish a straight line equation M1 passing through the center point P1 along the vector and R direction, starting from the center point, along the vector and direction, establish a point P2 at a certain distance from the starting point; for each projection point, establish a projected point and the linear equation m2 of P2, calculate the angle θ between the straight line m2 and M1, and find the coordinates (xi, yi, zi) of the projection point Oi with the maximum angle; calculate the distance L between the projection point of the maximum angle and the line M1;

[0154] The equation of the straight line M1 passing through the cente...

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Abstract

The invention belongs to the field of aviation composite manufacturing and particularly relates to a method for determining the position of a composite curved surface ply laser projector. When composite ply design is conducted, when composite ply position line material design software is input into the projector, three-dimensional coordinates of a series of projection points and normal vector directions, on a projection curved surface, of the projection points are obtained. The central point and vector sum of all the projection points are calculated through an analytical geometry method; then,parameters of the projector are combined, and the placement position of the projector is calculated; then, according to the flat and straight angle of the projector and the molded surface deviation of a mold, the positional deviation condition of the projection points and the widths of projection lines are comprehensive analyzed; when the positional precision and the line width are out of limit,the number of the projectors is increased, or the projection area is reduced; and re-calculation of the position of the projector and the width of each projection line is conducted. The method has a great significance for improving the composite ply precision and the structural consistence of a composite workpiece.

Description

technical field [0001] The invention belongs to the field of aviation composite material manufacturing, and in particular relates to a method for calculating the layering accuracy of composite materials. technical background [0002] In the production of composite parts, the workload of laying is heavy. One of the problems is that it is difficult to accurately position the laying. In the process of manual laying, the closer the laying is, the greater the error. Manufacturing technology addresses this challenge by using a laser projection system to visualize the ply outline on the mold to enable accurate positioning of the ply. [0003] However, with the improvement of manufacturing precision requirements for composite material parts, especially when laser projection is performed on concave or convex surfaces with large curvature, the way of laser projection will have a great impact on projection accuracy, and sometimes it will be difficult to use the same projection system,...

Claims

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Application Information

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IPC IPC(8): B29C70/54B29C70/30B29L31/30
Inventor 贾顺利修志峰高爱娟
Owner THE RES INST FOR SPECIAL STRUCTURES OF AERONAUTICAL COMPOSITE AVIC
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