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Manufacturing method of curved-surface-shaped sandwich structure and curved-surface-shaped sandwich structure

A technology of a sandwich structure and a manufacturing method, which is applied in the field of a curved sandwich structure, can solve the problem that the expected dimensional accuracy cannot be obtained, and achieve the effect of reducing the forming cost

Inactive Publication Date: 2016-06-08
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of a curved surface, the shape changes three-dimensionally due to the curing and shrinkage of the resin, and there is a problem that the expected dimensional accuracy cannot be obtained.

Method used

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  • Manufacturing method of curved-surface-shaped sandwich structure and curved-surface-shaped sandwich structure
  • Manufacturing method of curved-surface-shaped sandwich structure and curved-surface-shaped sandwich structure
  • Manufacturing method of curved-surface-shaped sandwich structure and curved-surface-shaped sandwich structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0059] use figure 1 and figure 2 The curved FRP sandwich structure according to Embodiment 1 of the present invention will be described. figure 1 It is a perspective view showing a curved FRP sandwich structure. and, figure 2 is showing figure 1 Cross-sectional view of a curved FRP sandwich structure.

[0060] Such as figure 1 and figure 2 As shown, in the curved FRP sandwich structure 1 , the faces facing each other are arranged at predetermined intervals, one face is concave, and the other face is convex. Therefore, the curved FRP sandwich structure 1 has a curved shape having a desired thickness distribution. The thickness of the curved FRP sandwich structure 1 may not be constant, and the thickness at the end may be 0, that is, the outer peripheral part may not be planar but linear.

[0061] Furthermore, the curved FRP sandwich structure 1 is a sandwich structure in which FRP is used as a skin material. That is, the curved FRP sandwich structure 1 is composed o...

Embodiment approach 2

[0128] In Embodiment 1 above, an example in which the shape of the convex curved portion 5 a of the convex molding die 5 is a spherical surface has been described. On the other hand, in Embodiment 2, an example in which the shape of the convex curved portion 5 a is a paraboloid of revolution will be described.

[0129] Figure 22 It is a sectional view at the symmetry plane of the convex molding die 5 used in the second embodiment of the present invention. and, Figure 23 is shown using Figure 22 The perspective view of the curved FRP sandwich structure 1 formed by the convex forming die 5 of . The manufacturing method of the curved FRP sandwich structure 1 is the same as the manufacturing method of the previous first embodiment except that the shape of the convex curved portion 5a is different.

[0130] The paraboloid of revolution forming the shape of the convex curved portion 5a is a curved surface represented by the following formula (1). It should be noted that a in...

Embodiment approach 3

[0141] In Embodiment 1 above, an example in which the shape of the convex curved portion 5 a of the convex molding die 5 is a spherical surface has been described. On the other hand, in Embodiment 3, an example in which the shape of the convex curved portion 5 a is a cylindrical surface will be described.

[0142] Figure 25 It is a cross-sectional view of the male forming die 5 used in Embodiment 3 of the present invention cut along a plane perpendicular to the axial direction. and, Figure 26 It is a perspective view showing a curved FRP sandwich structure 1 molded using the convex molding die 5 shown in the figure. The manufacturing method of the curved FRP sandwich structure 1 according to the third embodiment is the same as the manufacturing method of the previous first embodiment except that the shape of the convex curved portion 5 a is different.

[0143] The cylindrical surface forming the shape of the convex curved portion 5a is a curved surface represented by the ...

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Abstract

The invention provides a curved-surface-shaped sandwich structure and a manufacturing method thereof. A prospective mirror surface precision is obtained, and the forming cost of the curved-surface-shaped sandwich structure is lowered. The manufacturing method comprises: a first surface skin material shaping step in which a convex shaping die (5) with a convex curved surface part (5a) and a side surface part (5b) having the prospective mirror surface precision is utilized to form a first surface skin material (2) with a first curved surface skin part (2a) and a first edge part (2b); a core materla bonding step in which a foaming core material (4) which is processed in advance and has the surface precision is bonded to the first curved surface skin part; a second surface skin material shaping step in which a second surface skin material (3) with a second curved surface skin part (3a) and a second edge part (3b) is formed to cover the laminated the first surface skin material and foamng core material on the convex shaping die; and a projection part removing step in which the first edge part and the second edge part are laminated and the parts protruding towards the lower part of the first surface skin material are removed.

Description

technical field [0001] The present invention relates to a method for manufacturing a curved sandwich structure using fiber-reinforced plastic material as a skin material and the curved sandwich structure. Background technique [0002] In recent years, fiber-reinforced plastics (Fiber Reinforced Plastics, hereinafter referred to as FRP) have been used in a wide range of fields, taking advantage of their lightweight, high-strength, and high-rigidity properties. Among them, a sandwich structure in which FRP is used as a skin material and a lightweight core material is sandwiched between the skin materials is widely known as a method for effectively using FRP to improve rigidity. [0003] Applications of such a sandwich structure include, for example, satellite frame structures, antenna reflectors, and radomes, and are particularly used in space and communication applications that require light weight and high rigidity. On the other hand, in recent years, such a sandwich struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/36B29C70/84
CPCB29C70/36B29C70/84
Inventor 松本迪齐高桥市弥小林广纪丰岛利之
Owner MITSUBISHI ELECTRIC CORP
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