Automatic fiber laying prepreg stiffness detection method

A technology of automatic wire laying and detection methods, applied in the direction of non-electric variable control, instruments, control/regulation systems, etc., can solve the problems of detection of prepreg tow performance, increase of test cost, and inability to directly apply, etc., to achieve detection speed The effects of fast, intuitive results, and simplified device structure

Active Publication Date: 2021-06-29
CHENGDU AIRCRAFT INDUSTRY GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing automatic wire laying machine is expensive, complex in structure and requires multiple people to operate, which greatly increases the test c

Method used

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  • Automatic fiber laying prepreg stiffness detection method
  • Automatic fiber laying prepreg stiffness detection method
  • Automatic fiber laying prepreg stiffness detection method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0038] Example 1

[0039] This example discloses an automatic paving prepreg constant detection method, and specifically includes the following steps:

[0040] S1, from the cold storage of 1000 mm long prepreg wire, place the prepreg wire in the constant temperature and humidity test chamber;

[0041] S2, after 60min, the prepreg silk beam is removed from the constant temperature and humidity test chamber, and the three-piece length of the three-piece length is 60 mm, and the excess material is re-placed back to the test chamber;

[0042] S3, remove the two prepreg yovings on the automatic paving test platform, adjust the position of the two slice buttons to completely cover the prepreg tow;

[0043] S4, the placing pressure of the test platform is 100 N, the release speed is 10 m / min, the release temperature is 35 ° C, the automatic paving test platform is activated, and two prepreg wire is bonded;

[0044] S5, placed on the prepreg stack formed in step S4, which also ensures t...

Example Embodiment

[0049] Example 2

[0050] This example discloses an automatic paving test platform for realizing the paving fitting of the prepreg tow, referring to the accompanying drawings Figure 1 - Figure 3 The automatic paving test platform mainly includes a base 1, an SR80 double-wire rail ribbar slide 2, a laying platform 3, a placing pressure control unit 4, a laying temperature control unit, and a PLC controller; further, The two-wire rail roller slide 2 includes a lead screw support plate 21, a motor support plate 22, a servo motor 23, a ball screw 24, a working platform 25, and a wire rail 26, a lead screw support plate 21, a motor support plate 22, and a motor support plate 22. The line rail 26 is disposed on the base 1, and the finite-up switch is provided on both ends of the wire rail 26, which is the first limit switch and the second limit switch, and the two limit switches are connected to the PLC controller, the limit switch. The entire working platform and the spreading platform...

Example Embodiment

[0054] Example 3

[0055] This example discloses a control method of an automatic paving test platform, and the entire control process includes a paving pressure closed loop control, a laying temperature closed loop control, and a lapse speed closed loop control. When the automatic paving test platform is activated, people The machine interface first transmits the electric cylinder 41 and the two-wire rail ribs slide 2 zero command to the PLC controller, and the PLC controller sends the zero command to the electric cylinder driver and the servo motor driver, each driver receives the zero command. and return is performed, the process determines an electric screw cylinder 41 and a double rail back to zero if the slide 2 by a corresponding limit switch.

[0056] In the present embodiment, the placement and pressure control at the same time controlling the temperature of the deposit, specifically:

[0057] Paving pressure closed loop control:

[0058] After the amount of pressure the ...

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Abstract

The invention relates to the technical field of automatic laying of composite materials, and discloses an automatic fiber laying prepreg stiffness detection method, which measures the maximum bending force of a multi-layer prepreg lamination through a three-point bending test, amplifies the tiny value of the tow stiffness, reduces the detection error, ensures the measurement precision, and has the advantages of higher detection speed and more visual result compared with an existing method for inspecting the stiffness of the prepreg tow by adopting a suspension method.

Description

technical field [0001] The invention relates to the technical field of automatic laying of composite materials, in particular to a method for detecting the stiffness of automatic laying prepregs. Background technique [0002] The automatic wire laying process is a low-cost and automatic forming manufacturing process for advanced composite materials. It is usually used in the manufacture of large-curvature composite components such as aircraft fuselages and S-shaped air intakes. During the laying process, the viscosity, stiffness and joint strength of the prepreg tow have a great influence on the final quality of the laying product. If the stiffness of the prepreg tow is too high or too low, it will be difficult to fit the adjacent plies smoothly during the laying process, resulting in bridging of the plies in the concave area of ​​the mold surface and reducing the quality of the final laying component. [0003] In order to ensure the quality of the laying components, on the...

Claims

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Application Information

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IPC IPC(8): G05D27/02
CPCG05D27/02
Inventor 缑建杰杨扬张川邓晓春陈代鑫徐龙周沈周宇帆
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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