Rebound deformation inhibition method for laser-assisted in-situ forming of thermoplastic composite structural component

Abstract

The invention relates to a rebound deformation inhibition method for the laser-assisted in-situ forming of a thermoplastic composite structural component. The rebound deformation inhibition method forthe laser-assisted in-situ forming of the thermoplastic composite structural component comprises the steps of (1) heating and pressing laid prepregs for the first time by adopting a laser light and apressing roller; (2) stopping laying a new prepreg, and heating and pressing the laid parts in the step (1) for multiple times; and (3) repeating the step (1) and the step (2) until a sample is prepared. Through heating and pressing for the first time, high-temperature melting resins in the adjacent layers of prepregs flow under the pressure action of the pressing roller, so that favorable interlayer bonding is formed. Through heating and pressing for multiple times, the sample releases an internal stress caused by the viscoelasticity of materials and rapid cooling through high temperature functions for multiple times, so that a rebound angle is reduced. According to the rebound deformation inhibition method for the laser-assisted in-situ forming of the thermoplastic composite structuralcomponent provided by the invention, online adjustment of rebound deformation can be realized, so that automatic integrated forming is realized favorably; the rebound deformation inhibition method canbe applied to laying and forming of the thermoplastic composite structural components in different shapes, and is simple to operate and capable of remarkably improving the geometric accuracy of the structural components; and a laser heat source is accurate and controllable, so that the localized adjustment of rebound deformation can be realized.

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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