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Machining method of special-shaped hollow structure composite part molding mandrel

A composite material and processing method technology, which is applied in the field of autoclave molding of resin-based fiber-reinforced composite material prepreg, can solve the problems of difficult demoulding and high mold cost, and achieve the effects of low cost, simple processing and convenient demoulding

Active Publication Date: 2019-06-18
成都联科航空技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a processing method for forming a core mold of a special-shaped hollow structure composite material part in view of the problems of high mold cost and difficult demoulding in the processing process of special-shaped hollow structure composite material parts in the prior art, This processing method can be used to process a forming core mold for composite parts that is easy to demould

Method used

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  • Machining method of special-shaped hollow structure composite part molding mandrel
  • Machining method of special-shaped hollow structure composite part molding mandrel
  • Machining method of special-shaped hollow structure composite part molding mandrel

Examples

Experimental program
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Embodiment

[0041] see Figure 1-Figure 9 . The embodiment of the present invention provides a processing method for forming a core mold 3 of a composite material part 1 with a variable cross-section and special-shaped hollow revolving body structure. see Figure 8 and Figure 9 , this processing method can obtain a kind of molding mandrel 3. This molding mandrel 3 can be used for processing such as figure 1 The variable cross-section special-shaped hollow rotary structure composite material part 1 is shown.

[0042] see figure 2 and image 3 The processing method provided by the embodiment of the present invention adopts a core mold forming mold 2, and the core mold forming mold 2 includes a first mold body 21, a second mold body 22 and a sealing plate 23. The first mold body 21 and the second mold body 22 are detachably connected. When the first mold body 21 and the second mold body 22 are connected, a molding space can be formed, and the shape of the molding space is adapted t...

example ( 1

[0077] see Figure 10-Figure 13 , when the above-mentioned molding mandrel 3 is used for the processing of the composite material part 1 with a variable cross-section special-shaped hollow rotary structure with high requirements on the surface quality and precision of the inner surface:

[0078] A1. fixing the forming mandrel 3 by a support rod 33;

[0079] Wherein, clamping support bar 33, can realize the fixing of forming mandrel 3, thereby make the surface of whole soft mold 31 not be blocked, be convenient to carry out the paving of composite material layer.

[0080] A2. on the surface of the soft mold 31, stick a release cloth with glue;

[0081] If multiple release cloths are required to cover the surface of the soft mold 31, two adjacent release cloths are butted together instead of spliced. That is: the edges of two adjacent release cloths are in contact, but the two release cloths do not overlap in the thickness direction. Through this arrangement, the surface qual...

example ( 2

[0091] see Figure 14-Figure 16 , when the above-mentioned molding mandrel 3 is used for the processing of the composite material part 1 with a variable cross-section special-shaped hollow rotary structure with high requirements on the surface quality and precision of the outer surface:

[0092] B1. fixing the forming mandrel 3 by a support rod 33;

[0093] Wherein, clamping support bar 33, can realize the fixing of forming mandrel 3, thereby make the surface of whole soft mold 31 not be blocked, be convenient to carry out the paving of composite material layer.

[0094] B2. Lay adhesive release cloth on the surface of soft mold 31;

[0095] If multiple release cloths are required to cover the surface of the soft mold 31, two adjacent release cloths are butted together instead of spliced. That is: the edges of two adjacent release cloths are in contact, but the two release cloths do not overlap in the thickness direction. Through this arrangement, the surface quality of the...

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Abstract

The invention relates to the technical field of resin base fiber reinforced composite prepreg hot pressing tank molding, in particular to a machining method of a special-shaped hollow structure composite part molding mandrel. The machining method adopts a mandrel molding mold; molding space is formed in the mandrel molding mold, and is used for molding the molding mandrel; and the wall surface ofthe molding space is a molding surface. The machining method comprises the following steps: soft mode blanks are folded on the molding surface; the soft mold blanks and the mandrel molding mold are pressed for tight contacting; the soft mold blanks are cured to form a soft mold; a water soluble material is cast in the soft mold until an inner cavity of the soft mold is totally filled; the water soluble material is cured; and the demolding is performed. The molding core mold obtained through the machining method has the advantages of simple machining, convenience to demold and lower cost.

Description

technical field [0001] The invention relates to the technical field of autoclave molding of resin-based fiber-reinforced composite material prepreg, in particular to a processing method for forming a mandrel of a special-shaped hollow structure composite material part. Background technique [0002] Due to its light weight, high specific strength and specific stiffness, and strong designability, composite materials are increasingly used in the field of aerospace vehicle structural parts; Aero-engine inlet with deformed cross-section; when forming this type of structural parts, the side with high surface quality and precision requirements is usually selected as the surface that fits the mold, referred to as the mold-fitting surface. When the inner shape surface of the part is the mold-fitting surface, the male mold lay-up and forming method can be used, and the demoulding of the part after curing is more difficult; when the outer shape surface of the part is the mold-fitting s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/00B29C33/52
Inventor 李书军陈剑尹军华李璐璐杨自燕周才超石小平任贵川谷雨
Owner 成都联科航空技术有限公司
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