Flexible die for molded composite material stringer and preparation method thereof

A composite material and flexible mold technology, applied in the field of process manufacturing, can solve the problems of low rigidity of rubber soft mold, difficult positioning, unsatisfactory axiality and straightness of long truss, etc. Quality, the effect of realizing mold positioning

Active Publication Date: 2016-11-09
BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low rigidity of the rubber soft mold, it is difficult to position during the assembly process before curing and during the curing process,

Method used

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  • Flexible die for molded composite material stringer and preparation method thereof
  • Flexible die for molded composite material stringer and preparation method thereof
  • Flexible die for molded composite material stringer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0028] The technical solutions of the present invention will be further described below in conjunction with specific embodiments.

[0029] like Figure 1-2 As shown, the present invention is a flexible mold for molding composite stringers, the flexible mold includes at least one molding unit; the section of the molding unit is L-shaped, and the L-shaped molding unit includes at least one flexible module and two a rigid module, the two rigid modules are connected by a flexible module, and the ends of the L-shaped forming units are all rigid modules;

[0030] Wherein, the rigid module corresponds to the region of equal thickness of the composite stringer flange and the web, and the flexible module corresponds to the corner region of the composite stringer and the thickness change transition region.

[0031] The size of the flexible module is larger than its corresponding composite material stringer corner area and the transition area of ​​flange and web thickness change, and th...

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PUM

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Abstract

The invention belongs to the field of technical manufacturing, and particularly relates to a die for a molded composite material stringer, which can be used for guaranteeing that impressed pressure is effectively transferred in a curing process, effectively controlling the defects of layering and pores and meanwhile guaranteeing the dimensional accuracy of a work piece, and a preparation method thereof. The flexible die comprises at least one molding unit, wherein the section of the molding unit is in an L shape or a C shape; the molding unit which is in the L shape comprises at least one flexible module and two rigid modules; and the molding unit which is in the C shape comprises at least two flexible modules and three rigid modules. The die for the molded composite material stringer and the preparation method thereof have the beneficial effects that the defects of the layering and the pore can be effectively controlled; the location of the die is facilitated; the axis degree and the straightness degree of the stringer are guaranteed; the violent assembly of the die can be avoided; the labor intensity is decreased; the work efficiency is improved; a segmental structure is adopted; and the blocking partition of the flexible die is about to be more flexible.

Description

technical field [0001] The invention belongs to the field of process manufacturing, and in particular relates to a mold for forming a long stringer made of composite materials, which can ensure the effective transmission of external pressure during the curing process, effectively control delamination and pore defects, and ensure the dimensional accuracy of the workpiece and its preparation method. Background technique [0002] L-shaped, T-shaped, J-shaped, C-shaped and I-shaped long trusses are widely used in composite material reinforced wall panels, and composite material reinforced wall panels are generally integrally formed by co-curing or co-gluing. During the forming process, the mold is very important to effectively transmit the applied pressure, control the delamination and porosity defects, and ensure the dimensional accuracy, especially the long stringer forming mold. At present, rigid molds or rubber soft molds are widely used in the field of composite materials. ...

Claims

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Application Information

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IPC IPC(8): B29C70/54B29C70/34B29C33/38
CPCB29C33/3842B29C70/345B29C70/54
Inventor 辛朝波王栋
Owner BEIJING AERONAUTIC SCI & TECH RES INST OF COMAC
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