Free roll bending equipment for super-hybrid composite layer plates and forming method

A composite layer and super-hybrid technology, applied in metal processing and other directions, can solve the problems that the metal layer and the composite material layer cannot be deformed together, the pressure of the blank cannot be guaranteed, and the forming accuracy of the component cannot be guaranteed. The effect of high degree of automation and improved designability

Active Publication Date: 2017-11-24
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of the (1) method is that the use of rigid special-shaped molds to form curvature components cannot ensure constant pressure everywhere on the blank, and the interlayer performance of the formed components is poor
The (2) method uses two-way differential pressure forming, and the disadvantage is that the forming accuracy of the component cannot be guaranteed
The (3) method uses warm forming. The disadvantage is that it can only be used to form a super-hybrid composite laminate member with a thermoplastic resin-based composite material as the sandwich layer, and because the metal layer and the composite material layer cannot be deformed cooperatively, the interlayer bonding strength is affected. great influence

Method used

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  • Free roll bending equipment for super-hybrid composite layer plates and forming method
  • Free roll bending equipment for super-hybrid composite layer plates and forming method
  • Free roll bending equipment for super-hybrid composite layer plates and forming method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] In the first step, the 2024 aluminum alloy coil with a thickness of 0.3 mm is subjected to degreasing, alkali cleaning, pickling and phosphoric acid anodizing treatment;

[0049] In the second step, three rolls of surface-treated aluminum alloy coils and two rolls of double-layer glass fiber reinforced epoxy resin prepreg coils (single-layer thickness 0.15mm) are placed on the corresponding feeding rollers according to the interval order ;

[0050] In the third step, the feed roller rotates at a specific linear speed while the spray gun evenly sprays the epoxy resin dispersed in chloroform on the surface of the aluminum alloy coil that needs to be bonded with the glass fiber reinforced epoxy resin composite material. The amount of spray glue is 40g / m on one side 2 ;

[0051] In the fourth step, after the multi-layer coils are stacked, they are drawn into the continuous three-pass high-temperature rolling station, and the excess glue and air are discharged under high t...

Embodiment 2

[0057] In the first step, the TA2 titanium alloy coil with a thickness of 0.3mm is degreased, pickled and anodized with sodium hydroxide;

[0058] In the second step, three rolls of surface-treated titanium alloy coils, two rolls of double-layer carbon fiber reinforced polyether ether copper prepreg coils (single-layer thickness 0.125mm), four rolls of polyether with a thickness of 0.1mm The ether copper film is set on the corresponding feeding roller shaft according to the interval order;

[0059] In the third step, after the multi-layer coils are stacked, they are drawn into the continuous three-pass high-temperature rolling station, and the excess glue and air are discharged under high temperature and high pressure, so that the layers are completely bonded, and the temperature of the rolls is set at 390 ℃, the rolling pressure is set to 0.6MPa;

[0060] In the fourth step, the composite sheet after the interlayer airtight lamination enters the free bending station, the fix...

Embodiment 3

[0065] In the first step, the 2024 aluminum alloy coil with a thickness of 0.3mm is degreased, alkaline cleaned, pickled and sandblasted;

[0066] In the second step, two rolls of surface-treated aluminum alloy coils and one roll of double-layer glass fiber reinforced epoxy resin prepreg coils (single-layer thickness 0.15mm) are placed on the corresponding feeding rollers in the order of intervals ;

[0067] In the third step, the feed roller rotates at a specific linear speed while the spray gun evenly sprays the epoxy resin dispersed in chloroform on the surface of the aluminum alloy coil that needs to be bonded with the glass fiber reinforced epoxy resin composite material. The amount of spray glue is 40g / m on one side 2 ;

[0068] In the fourth step, after the multi-layer coils are stacked, they are drawn into the continuous three-pass high-temperature rolling station, and the excess glue and air are discharged under high temperature and high pressure, so that the layers...

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Abstract

The invention discloses a free roll bending equipment for super-hybrid composite layer plates and a forming method. The super-hybrid composite layer plates are of lamination structures of metal layers and fiber reinforced resin base composites, and the forming method comprises six procedures, namely spraying glue and feeding, hot rolling, free roll bending, water cutting and pressure maintaining cooling; the free roll bending operation is achieved by rotating of a bending roll shaft and revolving around an fixing roll shaft of the bending roll shaft, the bending curvature is determined by the radius of the fixing roll shaft, and the bending angle is determined by the revolution angle of the bending roll shaft; and after an bending component is subjected to free roll bending, the bending component is placed in a closed container with a constant pressure to conduct heat insulation and is cooled to a room temperature. According to the free roll bending equipment for the super-hybrid composite layer plates and the forming method, preparation and bending formation of the super-hybrid composite layer plates are integrated, manufacturing cost and time is reduced by a large margin, and the free roll bending equipment for the super-hybrid composite layer plates and the forming method have the advantages of being high in interlayer combination strength, high in forming precision, high in degree of automation and high in designability.

Description

technical field [0001] The invention belongs to the technical field of advanced preparation and forming of super-hybrid composite laminate structures, and in particular relates to a super-hybrid composite laminate free rolling bending equipment and a forming method thereof. Background technique [0002] The super-hybrid composite laminate involved in the present invention is a laminated structure of multilayer metal sheets and continuous fiber-reinforced resin-based composite laminates. The super-hybrid composite material relies on its ultra-high specific strength and specific stiffness and excellent impact resistance And corrosion resistance has become an advanced structural material with great application prospects, which has attracted extensive attention in the fields of aerospace, shipbuilding, rail transit and automobile manufacturing. Due to the complexity of the structure of the hyperhybrid composite laminate, its preparation and forming issues have attracted much att...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C69/00B29C65/48B29C65/02B29C65/78B29C53/04B26F3/00B29C35/16
CPCB26F3/004B29C35/16B29C53/04B29C65/02B29C65/48B29C65/7858B29C69/00B29C69/001B29C2035/1616
Inventor 潘蕾马文亮王一凡庞小飞吕云飞陶杰郭训忠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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