CN105150557A - Method for manufacturing self-made auxiliary tooling for forming of large-curvature heteromorphic C-shaped frame type part - Google Patents

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

A kind of self-control auxiliary mould manufacture method for deep camber abnormity C type frame class forming parts

Technical field

The present invention relates to deep camber abnormity C type frame class formation composite material parts and manufacture field, specifically a kind of moulding technique that can improve the self-control auxiliary mould of deep camber abnormity C type frame class part quality.

Background technology

C type frame class part is the important component part of fuselage main force support structure, is mainly used in the connection between airliner rear body wallboard, plays skeletal support effect simultaneously.At present, external civil aircraft fuselage bulkhead adopts low cost fabrication scheme, as three-dimensional establishment/RTM(resin transfer moulding is shaped) and NCF(fibre non-crimped cloth) fabric/RTM technique etc., and at home under prior art condition, still adopt vacuum bag-autoclave legal system to make carbon fibre composite C type frame class part.C type frame class design of part is complicated, curvature is large, and band L-type angle section, manufacture difficulty is large.Adopt traditional process well can not ensure quality and the gauge of part, and because corner's Zone R territory is by the impact of shape and bulk, the accuracy of corner regions gauge can not be ensured, and the piece surface out-of-flatness of C type web and L-type angle section overlapping region, there is jump.

Summary of the invention

In order to solve the technical problem of above-mentioned existence, the invention provides the self-control auxiliary mould manufacture method of a kind of deep camber abnormity C type frame class forming parts, the method does not need independent forming frock, greatly reduces production cost.

The object of the invention is to be achieved through the following technical solutions: a kind of self-control auxiliary mould manufacture method for deep camber abnormity C type frame class forming parts, is characterized in that: comprise the steps:

Step 1: foam splices: bonded together by foam blank with foam glue, solidify in an oven, cure parameter, for being warming up to 166-182 DEG C, is incubated 60-90min;

Step 2: foam digital control milling: control milling cutter spacing and be less than 0.2mm, ensure the flatness of foam surface, become C type foam as formpiston the foam woollen milling of splicing;

Step 3: process conditions laying: with the C type foam of the good surfacing of milling for formpiston laying mould, by part layering laying process conditions blank;

Step 4: process conditions shifts, combines and solidify: transferred in female mould forming mould together with C type foam formpiston to the process conditions blank on C type foam formpiston by laying, be combined into matched molds combination die and curing process part;

Step 5: return system self-control auxiliary mould: after the solidification of step 4 process conditions, C type foam is destroyed, take out, cleaning technology part surface, the one-side band rubber moulding cloth that laying is smooth, at the thick prepreg of plane area laying 2mm, and adopts laying staggered floor transient mode at nearly Zone R, at Zone R and stile district laying half finished rubber, after solidification, make auxiliary mould.

Beneficial effect of the present invention: the self-control auxiliary process cover plate matching that the process conditions manufactured by this scheme returns system is good, surfacing, profile is accurate, especially the shape of Zone R and size accurate, for the manufacture of deep camber abnormity C type frame class part, effectively solve the surface quality of this type of part, the quality problems such as the gauge of gauge and corner's Zone R.Break through the technology barrier of deep camber abnormity C type frame class formation composite material parts in actual production manufactures, realize the zero defect manufacture of product.Auxiliary mould constructed in accordance, does not need independent forming frock, greatly reduces production cost, also can be used for the composite product manufacture of the various derived structure forms such as C shape, U-shaped.

Accompanying drawing explanation

Fig. 1 is the using state figure of C type frame class forming parts auxiliary mould (technique cover plate) and part.

Fig. 2 is for preparing the state diagram of the step 4 of auxiliary mould shown in Fig. 1.

Fig. 3 is for preparing the state diagram of the step 5 of auxiliary mould shown in Fig. 1.

Detailed description of the invention

In order to improve deep camber abnormity C type frame class surface quality of workpieces, the quality problems such as the gauge of gauge and turning Zone R, from the matching of frock and part, harmony is set out, take into full account the design feature of deep camber abnormity C type frame class part and the version of frock, manufacture master mold (process conditions) to return auxiliary process cover plate processed be crucial accurately, its concrete scheme is as follows:

Step 1: foam splices: foam blank (trade mark FD-20) is bonded together with foam glue (ZMS2180, I type, 3 classes, 50 grades).Solidify in an oven, cure parameter, for being warming up to 166-182 DEG C, is incubated 60-90min;

Step 2: foam digital control milling: control milling cutter spacing and be less than 0.2mm, ensure the flatness of foam surface, become C type foam as formpiston the foam woollen milling of splicing;

Step 3: process conditions laying: with the C type foam of the good surfacing of milling for formpiston laying mould, by part layering laying process conditions blank;

Step 4: process conditions shifts, combines and solidify: transferred in female mould forming mould together with C type foam formpiston to the process conditions blank on C type foam formpiston by laying, be combined into matched molds combination die and curing process part (as shown in Figure 2);

Step 5: return system self-control auxiliary mould (technique cover plate): after process conditions solidification, C type foam is destroyed, take out, cleaning technology part surface, the one-side band rubber moulding cloth that laying is smooth, return technique cover plate processed---at the thick prepreg of plane area laying 2mm, and adopt laying staggered floor excessive manner at nearly Zone R, in Zone R and stile district laying half finished rubber (model AIRPAD), adopt the version of bi-material combination, by the auxiliary mould (established technology cover plate) (as shown in Figure 3) solidifying the overall unification of rear formation, soft or hard combines.

In part manufacture process, this auxiliary mould (technique cover plate) is used to achieve the zero defect manufacture of deep camber abnormity C type frame class part, auxiliary mould (technique cover plate) and part using state figure as shown in Figure 1.

Claims (1)

1., for a self-control auxiliary mould manufacture method for deep camber abnormity C type frame class forming parts, it is characterized in that: comprise the steps:

Step 1: foam splices: bonded together by foam blank with foam glue, solidify in an oven, cure parameter, for being warming up to 166-182 DEG C, is incubated 60-90min;

Step 2: foam digital control milling: control milling cutter spacing and be less than 0.2mm, ensure the flatness of foam surface, become C type foam as formpiston the foam woollen milling of splicing;

Step 3: process conditions laying: with the C type foam of the good surfacing of milling for formpiston laying mould, by part layering laying process conditions blank;

Step 4: process conditions shifts, combines and solidify: transferred in female mould forming mould together with C type foam formpiston to the process conditions blank on C type foam formpiston by laying, be combined into matched molds combination die and curing process part;

Step 5: return system self-control auxiliary mould: after the solidification of step 4 process conditions, C type foam is destroyed, take out, cleaning technology part surface, the one-side band rubber moulding cloth that laying is smooth, at the thick prepreg of plane area laying 2mm, and adopts laying staggered floor transient mode at nearly Zone R, at Zone R and stile district laying half finished rubber, after solidification, make auxiliary mould.