Liquid-solid pressure formation device and method for thin-wall special-shaped parts made of Cf-Mg composite materials

A technology of composite materials and special-shaped parts, which is applied in the field of Cf/Mg composite thin-walled special-shaped parts forming devices, can solve the problems of difficult to form prefabricated inner wall structures, etc. Effect

Active Publication Date: 2014-05-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the deficiency that the existing fiber-reinforced intermetallic compound composite member preparation device is difficult to form a prefabricated body with a complex inner wall structure, the present invention provides a C f Liquid-solid pressure forming device for thin-walled special-shaped parts of / Mg composite materials

Method used

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  • Liquid-solid pressure formation device and method for thin-wall special-shaped parts made of Cf-Mg composite materials
  • Liquid-solid pressure formation device and method for thin-wall special-shaped parts made of Cf-Mg composite materials
  • Liquid-solid pressure formation device and method for thin-wall special-shaped parts made of Cf-Mg composite materials

Examples

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Embodiment 1

[0025] Method Example 1: A C f / Mg composite material thin-wall special-shaped parts manufacturing method, choose AZ91D magnesium alloy, Taili T36 carbon fiber prefabricated body.

[0026] Step 1: Preparation of thin-walled special-shaped prefabricated body. Wind 12K unidirectional carbon fiber 0° / 90° into shaped parts and stitch them in the thickness direction. The prepared preform is placed in a chemical vapor deposition furnace for chemical vapor deposition, the preform is cured and a pyrolytic carbon coating is deposited on the surface of the fiber.

[0027] Step 2: Installation of forming device. Fix the punch 6 on the slider of the four-column hydraulic press to ensure that its center line is perpendicular to the plane of the slider; fully insert the inner pad 1 into the extrusion cylinder 2, and closely match the inner wall of the extrusion cylinder 2; process according to the size of the prefabricated outer wall The graphite mold 3 is installed on the upper part of ...

Embodiment 2

[0031] Method Example 2: A C with inner and outer flanges f / Mg composite material thin-wall special-shaped parts manufacturing method, choose AZ91D magnesium alloy, Toray T700 carbon fiber prefabricated body.

[0032] The difference between this embodiment and Embodiment 1 lies in the cross-sectional shape of the forming part of the insert group 4 and the shape of the carbon fiber preform, that is, the present invention can be used to realize C with different cross-sectional shapes. f Preparation of thin-walled special-shaped parts of / Mg composites. Other device components, connections and implementation steps are the same as those in Embodiment 1. C with inner and outer flanges is formed by machining f / Mg composite thin-walled profiled parts, followed by heat treatment and finishing.

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Abstract

The invention discloses a liquid-solid pressure formation device and method for thin-wall special-shaped parts made of Cf-Mg composite materials. The liquid-solid pressure formation device and method for the thin-wall special-shaped parts made of the Cf-Mg composite materials are used for solving the technical problem that prefabricated parts with complex inner wall structures are difficult to form by an existing fiber-reinforced intermetallic compound composite part manufacturing device. According to the technical scheme, a split insert structure replaces an integrated mandrel to shape the prefabricated parts. Compared with the integrated mandrel, the inner side of an insert set is hollow, a male mould is small, and the overall weight of a formation device can be reduced; magnesium alloy fluid is prompted to permeate the prefabricated parts evenly through the radial movement generated by stress on inserts; the surfaces of the inserts are tightly attached to the inner walls of the prefabricated parts, and the sizing effect is remarkable; near-net forming of the different-shape thin-wall special-shaped parts made of the Cf-Mg composite materials can be achieved by changing the shapes of sections of the inserts; the inserts are separated after extrusion is completed to achieve demoulding, and the technical problems that the prefabricated parts with the complex inner wall structures are high in sizing difficulty, and demoulding is difficult are effectively solved, and forming of the thin-wall special-shaped parts made of the Cf-Mg composite materials is achieved.

Description

technical field [0001] The present invention relates to a C f / Mg composite material thin-wall special-shaped parts forming device, in particular to a C f Liquid-solid pressure forming device for thin-walled special-shaped parts of / Mg composite material. Also involves the use of the device C f Liquid-solid pressure forming method for thin-walled special-shaped parts of / Mg composite materials. Background technique [0002] C f / Mg composites have a low density (less than 2.0g / cm 3 ), high specific strength, high specific stiffness, low thermal expansion coefficient, and good dimensional stability, etc., are widely used in thin-walled special-shaped parts such as engine piston rings, aircraft cylindrical brackets, gearbox casings, and aviation turbofan engine cases. manufacturing. At present, two methods are basically adopted for the forming of thin-walled special-shaped parts of composite materials: one is separate forming, forming each part in sequence, and then conn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D23/04
Inventor 齐乐华房鑫卫新亮周计明关俊涛田文龙
Owner NORTHWESTERN POLYTECHNICAL UNIV
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