Resin content self-adaptive control method of 3D printing continuous fiber reinforced composite material

Abstract

The invention relates to a resin content self-adaptive control method of a 3D printing continuous fiber reinforced composite material. The resin content self-adaptive control method comprises the following steps: firstly acquiring a curved fiber distribution graph of a variable-rigidness composite material, and obtaining a discrete point coordinate value of each curved fiber printed path; according to distribution characteristics of a curved fiber printed path discrete point, selecting a curve fitting way to perform the fitting, and obtaining a curve equation or a curve interpolation discretepoint; then dynamically calculating a curve distance of each area at each time according to the curve equation or curve interpolation discrete point; according to the curve equation or curve interpolation discrete point as well as the curve distance of each point, correcting each printed curve position coordinate and a printing width, calculating a resin content of each position, and obtaining a 3D printing instruction file; and finally inputting the 3D printing instruction file into a 3D printer, and completing the 3D printing. By adopting the method of the invention, the real-time calculation of a distance between two curves on two positions of different distances can be realized, and the resin and fiber content can be controlled on any position in the 3D printing process.

Description

technical field [0001] The invention relates to the technical field of forming continuous fiber reinforced composite materials, in particular to an adaptive control method for resin content of 3D printed continuous fiber reinforced composite materials. Background technique [0002] As an anisotropic material, fiber-reinforced composite materials have the advantages of high specific strength, high specific modulus, design strength and multi-functional integration compared with metal alloy materials, and are widely used in aerospace, automobiles, ships and Wind power and other fields. With the development of new composite material manufacturing technology, continuous fiber composite materials with mechanical-electrical-thermal integration function regulation for stiffness, heat conduction, electromagnetic and other properties have become an urgent demand in aerospace, shipbuilding and other fields. [0003] Variable stiffness composite materials can maximize the designability...

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Problems solved by technology

[0004] Chinese patent (Application No. 201710784335.0, titled "A method for preparing a function-regulated structure based on continuous fiber composite 3D printing") provides a 3D printing process technology and path planning method for function-regulated materials, but does not propose a method for variable An adaptive control method for the resin content of the spacing, this method is a necessary way to solve the variable stiffness control of continuous fiber reinforced composite materials

[0005] (1) The existing 3D printing process software is set for uniform scanning distance and resin extrusion speed parameters, and it is impossible to adjust the non-linear numerical adjustment of various process parameters to the 3D printing gcode file, so it is difficult to fully realize the variable stiffness composite material. Complex fiber path and content dynamic control;

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