Additive manufacturing method of fiber rod-prearranged Z direction-reinforced continuous fiber composite material

Abstract

The invention provides an additive manufacturing method of a fiber rod-prearranged Z direction-reinforced continuous fiber composite material. Firstly, fiber rods are prepared, and then a substrate isprinted through melt extrusion of pure resin; then, a printing path is planned and the fiber rods are prearranged in real time according to the prearrangement requirements of the fiber rods; after the substrate is printed, a printing end performs extrusion forming 3D printing on the continuous fiber reinforced resin-based composite material, and the number and the distribution mode of the fiber rods are estimated according to the intensity requirements; when passing through the reserved positions of the fiber rods, the printing end avoids the reserved positions according to the set interpolation path; when the printing end passes through the reserved positions and ensures that mechanical interference does not occur between the printing end and prearranged heat guns, the prearranged heat guns drive the fiber rods into the reserved positions; and printing is repeated until a formed part reaching a specified thickness is obtained according to the lengths of the fiber rods. According to the method, the Z-direction fiber rods are prearranged in the extrusion forming printing process, so that the Z-direction mechanical property is improved, and the anisotropy of the composite material product is reduced.

Description

technical field [0001] The invention belongs to the field of advanced manufacturing technology, and in particular relates to a Z-direction reinforced continuous fiber composite material additive manufacturing method of preset fiber rods. Background technique [0002] Continuous fiber composite materials are an important support for aerospace, national defense and military industries. Since the 1980s, from the principle development of continuous fiber composite materials in the field of aviation manufacturing in the United States to the technology deployment and molding applications in many countries in the 1990s, development So far, Arevo Labs in the United States has been able to use fiber placement technology to realize continuous fiber composite material molding with a width of up to 8m. Electroimpact has used its continuous fiber placement equipment to print parts for NASA's construction of Mars and other human spacecraft. And the Boeing 777X wing structure printing, and t...

AI Technical Summary

Problems solved by technology

[0003] Because of the manufacturing characteristics of "layer-by-layer superimposition", the existing formed parts have a problem of great interlayer bonding difference, and the distribution of continuous fibers in the X-Y plane (that is, within the layer) can effectively improve each in the X-Y plane. For mechanical properties, the Z-direction only relies on the bonding between resins to form parts, which has a huge anisotropy problem, which limits the advantages of composite materials and the potential of fiber reinforcement.

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