Combination mold for the preparation of fiber-reinforced composite corrugated sandwich frustum shell

A composite material and fiber-reinforced technology, which is applied in the field of combined molds for the preparation of fiber-reinforced composite folded sandwich circular frustum shells, to improve safety performance and service life, simplify the molding process, and avoid the decline in mechanical properties

Active Publication Date: 2021-12-10
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that there is no process for preparing a folded sandwich frustum shell at present, the present invention further provides a combined mold for preparing a folded sandwich frustum shell made of fiber-reinforced composite material

Method used

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  • Combination mold for the preparation of fiber-reinforced composite corrugated sandwich frustum shell
  • Combination mold for the preparation of fiber-reinforced composite corrugated sandwich frustum shell
  • Combination mold for the preparation of fiber-reinforced composite corrugated sandwich frustum shell

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specific Embodiment approach 1

[0051] Specific implementation mode one: combine Figure 1 to Figure 25 Describe this embodiment, the combination mold for preparing the fiber-reinforced composite folded sandwich frustum shell of this embodiment, the combination mold includes a core mold and a panel mold;

[0052] The core mold includes a male mold main body, a female mold main body, an inner support 1-6 of the first core mold, an inner support 1-7 of the second core mold and an outer support 1-5 of two core molds, and the male mold main body is made of A hollow circular platform shell structure composed of several male molds, the inner wall of the male mold body is a circular table surface, and a plurality of quadrilateral units 1-4 are arranged on the outer wall of the male mold body, in which N geometric shapes are arranged along the circumferential direction of the male mold body For the same quadrilateral unit 1-4, arrange M quadrilateral units 1-4 scaled in a certain proportion along the direction of th...

specific Embodiment approach 2

[0057] Specific implementation mode two: combination Figure 6 , Figure 7 and Figure 10 To illustrate this embodiment, the inner diameter of the upper bottom surface of the panel mold outer support body in this embodiment is equal to the outer diameter of the upper bottom surface of the pre-cured pleated sandwich conical shell, and the inner diameter of the lower bottom surface of the panel mold outer support body is the same as the outer diameter of the lower bottom surface of the pre-cured pleated sandwich conical shell. The outer support body of the panel mold is equal to the height of the pre-cured pleated sandwich conical shell; the outer diameter of the upper bottom surface of the inner panel mold body is equal to the inner diameter of the upper bottom surface of the pre-cured pleated sandwich conical shell, and the outer diameter of the lower bottom surface of the inner panel mold body is the same as the pre-cured pleated sandwich conical shell. The inner diameter of...

specific Embodiment approach 3

[0058] Specific implementation mode three: combination Figure 1 to Figure 5 , Figure 11 to Figure 18 To illustrate this embodiment, several inner panel molds of the panel mold of this embodiment are cut from a conical shell, and the cutting lines on any section perpendicular to the axis of the conical shell are parallel to each other; several intermediate panel molds of the panel mold are formed by A conical shell is cut, and the cutting lines on any section perpendicular to the axis of the conical shell are parallel to each other; several male molds of the core mold are cut from a conical shell, and the cutting lines on any section perpendicular to the axis of the conical shell The cutting lines are parallel to each other. With this arrangement, since the inner panel is a whole frustum-shaped inner panel, the main body of the inner panel mold is designed to be detachable, so that several inner panel molds can be disassembled from the inside of the frustum-shaped inner pane...

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Abstract

The utility model relates to a composite mold for preparing a folded sandwich circular frustum shell of a fiber-reinforced composite material, which relates to the field of composite material molding design. The invention solves the problem that there is no process for preparing the pleated sandwich circular frustum shell at present. The combined mold of the present invention includes a core mold and a panel mold; the core mold includes a male mold main body, a female mold main body, an inner support of the first core mold, an inner support of the second core mold and an outer support of two core molds. The main body of the mold is a hollow circular table shell structure composed of several male molds. The inner wall of the main body of the male mold is a circular table surface, and the outer wall of the main body of the male mold is provided with a plurality of quadrilateral units. The wall surface is a circular table surface, and a plurality of quadrilateral units are arranged on the inner wall surface of the female mold, and the quadrilateral units on the inner wall surface of the female mold are completely engaged with the corresponding quadrilateral units on the outer wall surface of the main body of the male mold. The invention is used for preparing fiber-reinforced composite folded sandwich circular frustum shells.

Description

technical field [0001] The invention relates to the field of composite material molding design, in particular to a combination mold for preparing a folded sandwich circular frustum shell of fiber-reinforced composite material. Background technique [0002] When the sandwich structure is applied to aerospace structures such as various aircraft and heavy-duty rocket bearing tubes, fairings, engine casings, and interstage sections, it needs to be prepared into a curved surface structure. In addition, because the diameters of some cylindrical shell structures are usually very different, some connecting devices need to be designed, and a typical matching structure is the frustum shell structure. At present, the frustum-shaped structure used in spacecraft is usually manufactured in the form of a metal frustum shell structure and stringer reinforcement, which inevitably produces the following disadvantages: (1) The forming process of a reinforced cylindrical shell with composite ma...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/38B29C33/00
CPCB29C70/34B29C70/54B29C33/3892B29C33/00
Inventor 孙雨果殷乾峰
Owner HARBIN INST OF TECH
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