Forming method for J-shaped composite material rib

A composite material and molding method technology, applied in the field of automatic manufacturing and processing of composite rib parts, can solve problems such as deformation, affecting the quality of parts bonding, and inability to automatically manufacture and produce composite rib parts, so as to ensure quality and realize Automated manufacturing, solving the effect of easy deformation

Inactive Publication Date: 2019-10-29
CHENGDU AIRCRAFT INDUSTRY GROUP
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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 the deformation of the prefabricated body in the moving process of the "J"-shaped composite ribs in the prior art method affects the bonding quality of the parts, and the problem that it cannot be applied to the automatic manufacturing of composite rib parts, the present invention provides a molding Good quality bending forming method suitable for automatic manufacturing,

Method used

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  • Forming method for J-shaped composite material rib
  • Forming method for J-shaped composite material rib
  • Forming method for J-shaped composite material rib

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] See figure 1 , the part has three bends, the bottom is a left-right symmetric bend, and the top is a side-facing bend. A molding method of a J-shaped composite rib of the present invention is formed through the following steps:

[0024] Step 1, laying the prepreg sheet on the bending mold;

[0025] Step 2: Bending the prepreg sheet into the shape of "Ji" through mechanical traction;

[0026] Step 3: Cut the top of the prepreg bent into the shape of "ji" to make it into the shape of "er";

[0027] Step 4, the left and right pressing blocks of the middle layer of the mold move to the middle, compacting the prepreg into a "T" shape;

[0028] Step 5: Bending the "T" shaped prepreg into a "J" shape through the translation of the pressing block on the upper layer of the mold.

Embodiment 2

[0030] The molding method of " J " shape composite rib parts of the present invention, the steps are:

[0031] Step 1, laying the prepreg sheet 6 on the lower left press block 1 and the lower right press block 2 of the bending mold;

[0032] Step 2, combining the left middle laminated block 3 and the right middle laminated block 4 on the mold, and compacting the prepreg sheet 6;

[0033] Step 3, the prepreg sheet 6 is bent into the shape of "几" through the traction of the traction bar 7;

[0034] Step 4, cut the top of the prepreg 6 bent into the shape of "ji" to make it into the shape of "er";

[0035] Step 5: Remove the drawbar 7, and move the lower left press block 1, lower right press block 2, middle left laminate block 3, and middle right laminate block 4 on the mold to the middle at the same time, and compact the prepreg 6 into a "T" shape;

[0036] Step six, the translational upper laminate block 5 on the mold is translated, and the "T" shaped prepreg 6 is bent into ...

Embodiment 3

[0038] The bending forming mold of the present invention comprises a left lower pressing block 1, a right lower pressing block 2, a left middle pressing block 3, a right middle pressing block 4 and an upper pressing block 5, and each of the five pressing blocks can relatively independently move. The 5 pressing blocks of the bending forming mold can independently provide pressure in the up and down, left and right directions. The pressing blocks of the bending forming mold are all chamfered on the corners in contact with the prepreg. The chamfer value is determined from the design value of the "J" shaped rib part.

[0039] In the present invention, the pressing block in the bending mold is made of metal material, but the use of other materials is not limited.

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Abstract

The invention discloses a forming method for a J-shaped composite material rib. The forming method comprises the following steps: laying a prepreg sheet on a left lower pressing block and a right lower pressing block of a bending and forming die; compacting the prepreg sheet by using a left middle layer pressing block and a right middle layer pressing block; drawing the prepreg sheet by using a drawing bar and bending the prepreg sheet into an n labyrinth shape; cutting the prepreg sheet in the n labyrinth shape to form a labyrinth-like shape; removing the drawing bar and moving the left lowerpressing block, the right lower pressing block, the left middle layer pressing block and the right middle layer pressing block to the middle and compacting the prepreg sheet into a T shape; and translating an upper layer pressing block and bending T-shaped prepreg into in a J shape. Compared with the prior art, the production of C-shaped preforms and Z-shaped preforms is not needed, the problem that the preforms which are manually laid in the forming process are easy to deform is solved, and the quality is ensured; and meanwhile, continuous bending action of the J-shaped composite material rib is realized, the efficiency is improved, and automatic manufacturing can be realized.

Description

technical field [0001] The invention relates to a bending forming method of a "J" shaped composite material rib part, and is especially suitable for automatic manufacturing and processing of the composite material rib part. Background technique [0002] Composite materials are widely used in aerospace structural components due to their light weight, high strength, and high modulus, while the common secondary load-bearing parts or outer skin structural parts are reinforced wall panels. The "J" shape structure is a typical structure type in composite material reinforced panel parts. At present, the molding method of "J" shaped composite rib parts is "two-step method", that is, manual laying method is used to make a "C" shaped prefabricated body and a "Z" shaped prefabricated body respectively, and then the The "C" shaped prefabricated body and the "Z" shaped prefabricated body are combined into a "J" shaped structural rib. However, when this forming method moves and combines...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C70/34B29C70/54B29L31/30
CPCB29C70/34B29C70/54B29L2031/3076
Inventor 张龙程勇闫雷鸽张冕张大伟彭坚
Owner CHENGDU AIRCRAFT INDUSTRY GROUP
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