Method for manufacturing self-made auxiliary tooling for forming of large-curvature heteromorphic C-shaped frame type part

A technology for auxiliary tooling and manufacturing methods, applied in the field of manufacturing composite material parts with large curvature special-shaped C-shaped frame structures, can solve the problems of difficult manufacturing, step difference, large curvature, etc., achieve accurate shape and size, and reduce production costs , good matching effect

Active Publication Date: 2015-12-16
SHENYANG AIRCRAFT CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

C-shaped frame parts have complex structures, large curvature, and L-shaped angle materials, making it difficult to manufacture
The traditional process method cannot guarantee the quality and thickness of the parts very well, and because the R area at th

Method used

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  • Method for manufacturing self-made auxiliary tooling for forming of large-curvature heteromorphic C-shaped frame type part
  • Method for manufacturing self-made auxiliary tooling for forming of large-curvature heteromorphic C-shaped frame type part
  • Method for manufacturing self-made auxiliary tooling for forming of large-curvature heteromorphic C-shaped frame type part

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Example Embodiment

[0014] In order to improve the surface quality of large-curvature shaped C-frame parts, the thickness dimension and the thickness dimension of the corner R area, starting from the matching and coordination of tooling and parts, fully consider the structure of large-curvature shaped C-frame parts The characteristics and structure of the tooling are the key to manufacturing accurate master molds (process parts) and returning the auxiliary process cover. The specific plans are as follows:

[0015] Step 1: Foam splicing: Use foam adhesive (ZMS2180, Type I, Type 3, Grade 50) to bond the foam blanks (brand FD-20) together. Curing in an oven, the curing parameters are heating up to 166-182°C, holding for 60-90 minutes;

[0016] Step 2: Foam CNC milling: Control the distance between the milling cutters to be less than 0.2mm to ensure the flatness of the foam surface, and mill the spliced ​​foam wool into a C-shaped foam as a male mold;

[0017] Step 3: Laying process parts: use the milled C...

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Abstract

The invention relates to a method for manufacturing a self-made auxiliary tooling for forming of a large-curvature heteromorphic C-shaped frame type part. The method comprises the following steps in specific: (1) splicing foam; (2) milling foam in a numerical control manner: milling the spliced foam into C-shaped foam; (3) laying craft pieces: by taking the milled C-shaped foam with smooth surface as a male die laying die, laying craft piece preform bodies according to a part laying layer; (4) transferring the craft piece preform bodies laid on the C-shaped foam male die and the C-shaped foam male die in a female die forming die together to form a female-male die combination die and cure the craft pieces; (5) breaking and taking out C-shaped male die foam, cleaning the surfaces of the craft pieces, laying smooth single-side band gel mold cloth, laying prepreg with a 2mm thickness on a plane zone, adopting a laying layer staggered transitional manner on a near-R zone, laying unvulcanized rubber on the R zone and a vertical side zone, and manufacturing the auxiliary tooling after curing. A self-made auxiliary craft cover plate modelled from the craft piece through the scheme is good in suitability, smooth in surface and accurate in molded surface.

Description

technical field [0001] The invention relates to the field of manufacturing composite material parts with large-curvature special-shaped C-shaped frames, in particular to a forming process method of self-made auxiliary tooling capable of improving the quality of large-curvature special-shaped C-shaped frame parts. Background technique [0002] C-shaped frame parts are an important part of the main load-bearing structure of the fuselage. They are mainly used for the connection between the rear fuselage panels of large passenger aircraft, and at the same time play a role in supporting the skeleton. At present, foreign civil aircraft fuselage frames adopt low-cost manufacturing solutions, such as three-dimensional weaving / RTM (resin transfer molding) and NCF (non-crease fabric) fabric / RTM processes, etc., while under the existing domestic technical conditions, The vacuum bag-autoclave method is still used to manufacture carbon fiber composite C-shaped frame parts. C-shaped fram...

Claims

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Application Information

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IPC IPC(8): B29C70/38B29C70/54
CPCB29C70/38B29C70/545
Inventor 周立娜徐斌昌张晓哲
Owner SHENYANG AIRCRAFT CORP
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