A springback deformation suppression method for laser-assisted in-situ formed thermoplastic composite structural parts

Abstract

A method for suppressing springback deformation of laser-assisted in-situ formed thermoplastic composite structural parts. 1) Use laser and pressure roller to heat and press the laid prepreg for the first time; 2) Do not lay new prepreg, but heat and press the laid part in step 1) multiple times; 3 ) Repeat steps 1) and 2) until the sample preparation is complete. The first time of heating and pressing is to make the high-temperature molten resin in the adjacent layer of prepreg flow under the pressure of the pressure roller to form a good interlayer bond. Repeated heating and pressurization is to make the sample undergo multiple high temperature effects, release the internal stress caused by the viscoelasticity of the material and rapid cooling, and reduce the springback angle. The invention can realize online adjustment of springback deformation, which is helpful to realize automatic integrated forming; it can be used for laying and forming of thermoplastic composite structural parts with various shapes, and the operation is simple, which can significantly improve the geometric accuracy of structural parts; the laser heat source is accurate and can control, which can realize the localized adjustment of springback deformation.

Description

technical field [0001] The invention relates to a method for suppressing springback deformation of a laser-assisted in-situ forming thermoplastic composite material structural part, and belongs to the technical field of composite materials. Background technique [0002] Thermoplastic composite materials have the characteristics of high specific strength and good impact resistance, and have great application prospects in aerospace, transportation and other fields. The melting and solidification of thermoplastic composite materials is a physical change process, and the solidification process is the forming process, which can greatly improve the forming efficiency. Thermoplastic composite structural parts are the basis of lightweight and complex structures, and their high-quality manufacturing is the basic manufacturing technology to further improve the performance of aerospace vehicles. The angle springback of the formed sample is a major problem in the forming of thermoplast...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the springback problem that occurs during the forming process of thermoplastic composite lattice structures and other complex structures, this patent provides a method for suppressing springback deformation of thermoplastic composite structural parts with laser-assisted in-situ forming, which helps to realize automation integration Forming, can be used for laying and forming of thermoplastic composite structural parts with various shapes, easy to realize localized adjustment of springback deformation, and helps to realize high-precision manufacturing of thermoplastic composite aerospace vehicle parts

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