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A kind of additive manufacturing method of pre-set fiber rod z-direction reinforced continuous fiber composite material

A technology of continuous fiber and composite materials, which is applied in the field of additive manufacturing of continuous fiber composite materials reinforced in the Z direction by pre-set fiber rods. It can solve the problems of limiting the potential of composite material fiber reinforcement, poor interlayer bonding, etc., and achieve high forming efficiency. , to achieve the effect of rapid manufacturing and simple operation process

Active Publication Date: 2020-07-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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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.

Method used

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  • A kind of additive manufacturing method of pre-set fiber rod z-direction reinforced continuous fiber composite material
  • A kind of additive manufacturing method of pre-set fiber rod z-direction reinforced continuous fiber composite material
  • A kind of additive manufacturing method of pre-set fiber rod z-direction reinforced continuous fiber composite material

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Embodiment Construction

[0024] The method of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0025] A kind of prefabricated fiber rod Z direction reinforced continuous fiber composite material additive manufacturing method, comprises the following steps:

[0026] 1) Refer to figure 1 and figure 2 Preparation of fiber rod 1: select material T300 (Toray Japan) carbon fiber bundle 101 and thermoplastic resin nylon PA6 102 as objects, use existing continuous fiber composite material melt extrusion molding or continuous fiber screw extrusion process to impregnate nylon PA6 102 into In the carbon fiber bundle 101, under the action of a certain traction force, after passing through the continuous fiber extrusion nozzle, it is rapidly cooled and solidified to form a fiber rod 1 impregnated with PA6 102 and wrapped around the carbon fiber bundle 101. Adjust the extrusion amount or extrusion speed of PA6 to achieve the required Adjustm...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/38B29C64/165B33Y10/00
Inventor 朱伟军罗盟田小永尚俊凡李涤尘
Owner XI AN JIAOTONG UNIV
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