A Soft Mold-Assisted Integral Forming Method of Composite Bearing Tube Containing Light-blocking Ring

A composite material and overall molding technology, which is applied in the field of soft mold-assisted overall molding of composite material load-bearing cylinders with halo-blocking rings, can solve the problems of increased product weight, many fasteners, and low efficiency, and solve the problem of connection strength, Guarantee the size requirements of the product and avoid the effect of bulges or pits

Active Publication Date: 2017-06-20
AEROSPACE RES INST OF MATERIAL & PROCESSING TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method not only has low efficiency and many fasteners, but also greatly increases the weight of the product, which cannot meet the requirements of light weight and high efficiency in satellite structures.
Therefore, it is necessary to realize the integral co-curing molding of the light-blocking ring and the bearing tube skin at one time, and maintain a certain connection strength, which brings considerable difficulties to the composite material molding process.
At present, there is no public literature at home and abroad that has reported the integral molding process technology of products with similar structures.

Method used

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  • A Soft Mold-Assisted Integral Forming Method of Composite Bearing Tube Containing Light-blocking Ring
  • A Soft Mold-Assisted Integral Forming Method of Composite Bearing Tube Containing Light-blocking Ring

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] like figure 1 As shown, the load-bearing tube of composite material includes a load-bearing tube skin 4, the upper and lower sides of the load-bearing tube skin 4 are valgus upper frame 1 and lower end frame 2, and six light blocking rings 3 are arranged inside the load-bearing tube skin 4.

[0032] Dimensions: The outer diameter of the upper and lower frames is 741mm, and the inner diameter is 693mm; the inner diameter of the skin is 600mm~602mm;

[0033] According to the present invention, a soft mold-assisted integral molding method of a composite material load-bearing cylinder containing a light-blocking ring includes the following steps:

[0034] (a) Silicone rubber soft mold preparation

[0035] The silicone rubber soft mold 12 is used for forming the light blocking ring, and it is prepared by pouring silicone rubber; specifically, the silicone rubber liquid is degassed, poured, cured at room temperature for 48 hours, and heat treated after demoulding to obtain t...

Embodiment 2

[0051] like figure 1 As shown, the load-bearing tube of composite material includes a load-bearing tube skin 4, the upper and lower sides of the load-bearing tube skin 4 are valgus upper end frame 1 and lower end frame 2, and seven light blocking rings 3 are arranged inside the load-bearing tube skin 4.

[0052] Dimensions: The outer diameter of the upper and lower frames is 741mm, and the inner diameter is 693mm; the inner diameter of the skin is 600mm~602mm; the thickness of the halo is 2mm, the thickness of the skin is 4mm, and the thickness of the upper / lower frame is 6mm.

[0053] According to the present invention, a soft mold-assisted integral molding method of a composite material load-bearing cylinder containing a light-blocking ring includes the following steps:

[0054] (a) Silicone rubber soft mold preparation

[0055] The silicone rubber soft mold 12 is used for forming the light-blocking ring, which is prepared by pouring silicone rubber; specifically, the silic...

Embodiment 3

[0070] like figure 1 As shown, the load-bearing tube of composite material includes a load-bearing tube skin 4, the upper and lower sides of the load-bearing tube skin 4 are the upper end frame 1 and the lower end frame 2 turned outward, and eight light blocking rings 3 are arranged inside the load-bearing tube skin 4 . The thickness of the halo ring is 0.3mm.

[0071] According to the present invention, a soft mold-assisted integral molding method of a composite material load-bearing cylinder containing a light-blocking ring includes the following steps:

[0072] (a) Silicone rubber soft mold preparation

[0073] The silicone rubber soft mold 12 is used for forming the halo ring, which is prepared by pouring silicone rubber; specifically, the silicone rubber liquid is defoamed, poured, cured at room temperature for 12 hours, and heat-treated after demolding to obtain a silicone rubber soft mold. The heat treatment process is as follows: Incubate at 170°C for 12h.

[0074] ...

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Abstract

The invention provides an auxiliary integral forming method for a composite material bearing cylinder soft mould with a light baffle ring. The auxiliary integral forming method comprises the following steps: (a) preparing a silicon rubber soft mould, which is used for forming the light baffle ring, by silicon rubber casting; (b) assembling an integral co-curing forming mould and laying up the light baffle ring; (c) laying up skin and absorbing rubber; (d) carrying out secondary laying-up; (e) carrying out integral co-curing by adopting a hot pressure tank forming process; (e) sequentially dismounting an outer female mould, an upper end frame pressure ring, a lower end frame pressure ring, a core mould and a sectioning male mould, and taking out the silicon rubber soft mould from the sectioning positive mould, thereby obtaining a bearing cylinder product. According to the auxiliary integral forming method, the integral forming of a composite material cylinder and a light baffle ring structural part is realized by utilizing the silicon rubber soft mould to assist pressurizing and combining the hot pressure tank forming process, so that the problem that a cylinder inner-wall thin plate structure is not liable to pressurize is solved.

Description

technical field [0001] The invention belongs to the technical field of composite material structure forming, and in particular relates to a soft mold-assisted integral forming method of a composite material load-bearing cylinder with a halo-blocking ring. Background technique [0002] The integral molding technology of composite materials is a related technology that greatly reduces the number of parts and fasteners by means of co-curing or co-gluing, so as to realize the integrated molding of composite materials from design to manufacture. The overall molding includes the most commonly used technologies such as co-curing, co-bonding, and secondary bonding. This technology can give full play to the designability advantages of composite materials, reduce the local damage caused by fasteners such as screws to composite materials, and play an important role in reducing the cost of composite materials and improving the overall performance of composite materials. One of the deve...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B29C70/34B29C70/54B29C33/38B29C33/00
CPCB29C33/00B29C33/3842B29C70/34B29C70/54
Inventor 付平俊李健芳蒋文革程雷韩明生冯海东李纯
Owner AEROSPACE RES INST OF MATERIAL & PROCESSING TECH
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