CN102225623A - Forming method of S-bend fiber reinforced plastic (FRP) air inlet - Google Patents
Forming method of S-bend fiber reinforced plastic (FRP) air inlet Download PDFInfo
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- CN102225623A CN102225623A CN2011100910802A CN201110091080A CN102225623A CN 102225623 A CN102225623 A CN 102225623A CN 2011100910802 A CN2011100910802 A CN 2011100910802A CN 201110091080 A CN201110091080 A CN 201110091080A CN 102225623 A CN102225623 A CN 102225623A
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Abstract
The invention discloses a forming method of an S-bend fiber reinforced plastic (FRP) air inlet. The forming method comprises the following steps of: (1) paving and sticking a male die inner liner; (2) resetting and combining the liner; (3) locally paving and sticking adjacent to a lip; (4) clamping a female die; and (5) assembling. The forming method has the advantages that the air inlet is made of a composite material with smooth surface, and the performance of the air inlet is improved.
Description
Technical field
The present invention relates to a kind of forming method of air intake duct, relate in particular to the forming method of the curved fiberglass air intake duct of a kind of S.
Background technology
The air intake duct of at present a lot of aircrafts and guided missile all is to adopt metal material, and main moulding process has explosive forming and panel beating moulding.But adopt example that composite does air intake duct seldom, moulding technique is not very ripe, complex-shaped especially like this S curved intake port.
Generally require all to adopt resin transfer moulding RTM moulding process on all smooth composite material parts technology of surfaces externally and internally, use the negative and positive combination die, but because S curved intake port shape is very complicated, the phenomenon that presents " two pluckings centres are thin " in the longitudinal direction can't solve the problem that formpiston is extracted out from the inner cavity of component demoulding with RTM.
Solve the problem that formpiston is extracted out from the inner chamber demoulding, can adopt piecemeal combination formpiston.But because the inner-cavity structure size is little, lengthwise dimension is big, adopts sectional pattern to need the polylith combination to realize.Consider existing frock manufacturing means and level, the quality of fit and the surface smoothness of combination formpiston are difficult to meet the demands.
Under such technical background, complex-shaped like this for the S curved intake port, the part that change in size is many, it is accurate to want with the structure of composite manufacturing, and the smooth streamline of surfaces externally and internally must be made improvement on existing moulding process.
Summary of the invention
The object of the present invention is to provide the forming method of the curved fiberglass air intake duct of a kind of S, accurate in order to guarantee S curved intake port physical dimension, the smooth streamline of surfaces externally and internally, the demoulding easily on technology simultaneously, we have adopted whole formpiston to make liner, and involutory former guarantees the process program of physical dimension.Specific implementation method is earlier to make frp lining with formpiston, cut apart the demoulding from mould after, reset with auxiliary mould, and then finish the shop layer thereon, carry out sizing and solidifying with former at last.
The present invention is achieved like this, and it is characterized in that forming method is:
(1) paving of formpiston inner liner
A) cloth four layers of SW210/J-4(high intensity glass fiber cloth of paving on formpiston), wherein be close to the two-layer of formpiston for putting in order cloth, the laying method of two outside layers is: the 3rd layer is separation with mold center's line, 20mm simultaneously successively decreases on both sides, the 4th layer is separation with mold center's line, and 40mm simultaneously successively decreases on both sides; Gel content is controlled at 40-50%; The innermost layer gel content is increased to 60%, forms surperficial resin-rich layer, so that surfacing is smooth;
B) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
C) cut the demoulding from mold center's line, carry out sign (but several lines of vertical mold center line drawing) at the tangent plane place before cutting, so that involutory after cutting;
(2) combination that resets of liner
A) with the incision of lining in the face of closing, inboardly fix with adhesive tape;
B) on the incision face of lining paving successively wide be the SW210/J-4(high intensity glass fiber cloth of 60mm and 100mm) cloth, make the opposite joint on the incision face compound, and both sides respectively overlap 10mm;
C) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
(3) near the local paving the lip
A) be lip wall thickness peak from lip edge line 92mm, being benchmark to both sides ladder layer herein, every layer the size 5mm that successively decreases, shop layer divide and carry out for three times, spread 15 layers for the first time, spread 16 layers for the second time.Spread 15 layers for the third time.All need be cured and polish at every turn;
B) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
C) record is carried out in correction of the flank shape and measure gauge;
(4) former matched moulds
A) the whole cloth two-layer SW210/J-4(high intensity glass fiber cloth of paving) requires overlap joint 15-20mm;
B) at above-mentioned two-layer SW210/J-4(high intensity glass fiber cloth) blank that paving is good is put into former before cloth is uncured, requires to aim at the peak position of upper and lower, left and right side;
C) matched moulds, and use clamp, cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, 2-3h after guaranteeing above-mentioned shop layer, allows to guarantee profile at outer surface lay glass felt;
(5) assembling
A) adorn a bolt base at distance lip edge line 34mm lower end, pattern is abideed by in processing, finishing, and machined surface seals with the J-4 epoxy glue; The air spots that occurs in the processing, edge lamination defect allow with J-4 glue and SW210(high intensity glass fiber cloth) repair;
B) the air intake duct both ends of the surface are inwardly carved the long groove of 10mm according to the center line of part, are used for the follow-up rigging position benchmark of part, allow the polishing of air intake duct and flange connections, width is 30mm, thickness after the polishing is not less than 1.5mm, and after the assembling, two parts are rotatable;
C) press mould and check the part profile, press pattern and check the part geometry size.
Described J-4 prescription be 10-12 parts of 100 parts of EPO1441-310 resins, triethylene tetramine and 5 parts of O-phthalic base dibutylesters by weight.
Advantage of the present invention is: adopt composite to do air intake duct, smooth surface improves inlet characteristic.
The specific embodiment
Carrying out the production preparation, guaranteeing to begin following steps after all raw materials, mould are correctly.
(1) paving of formpiston inner liner
A) cloth four layers of SW210/J-4(high intensity glass fiber cloth of paving on formpiston), wherein be close to the two-layer of formpiston for putting in order cloth, the laying method of two outside layers is: the 3rd layer is separation with mold center's line, 20mm simultaneously successively decreases on both sides, the 4th layer is separation with mold center's line, and 40mm simultaneously successively decreases on both sides; Gel content is controlled at 40-50%; The innermost layer gel content is increased to 60%, forms surperficial resin-rich layer, so that surfacing is smooth.(annotate: J-4 prescription: 10-12 parts of 100 parts of (by weight) triethylene tetramines of EPO1441-310 resin, 5 parts of O-phthalic base dibutylesters.）
B) cold curing 24h or heating cure (after cold curing is no less than 3h, 80 ℃ ~ 100 ℃, 2 ~ 3h)
C) cut the demoulding from mold center's line, carry out sign (but several lines of vertical mold center line drawing) at the tangent plane place before cutting, so that involutory after cutting.
(2) combination that resets of liner
A) with the incision of lining in the face of closing, inboardly fix with adhesive tape;
B) on the incision face of lining paving successively wide be the SW210/J-4(high intensity glass fiber cloth of 60mm and 100mm) cloth, make the opposite joint on the incision face compound, and both sides respectively overlap 10mm;
C) cold curing 24h or heating cure (after cold curing is no less than 3h, 80 ℃ ~ 100 ℃, 2 ~ 3h)
(3) near the local paving the lip
A) be lip wall thickness peak from lip edge line 92mm, being benchmark to both sides ladder layer herein, the shop layer divides and carries out for following three times, all need be cured and polish at every turn.
B) cold curing 24h or heating cure (after cold curing is no less than 3h, 80 ℃ ~ 100 ℃, 2 ~ 3h)
C) record is carried out in correction of the flank shape and measure gauge.
(4) former matched moulds
A) the whole cloth two-layer SW210/J-4(high intensity glass fiber cloth of paving) requires overlap joint 15-20mm;
B) at above-mentioned two-layer SW210/J-4(high intensity glass fiber cloth) blank that paving is good is put into former before cloth is uncured, requires to aim at the peak position of upper and lower, left and right side;
C) matched moulds, and use clamp, and cold curing 24h or heating cure (after cold curing is no less than 3h, 80 ℃ ~ 100 ℃, 2 ~ 3h)
(annotate: after guaranteeing above-mentioned shop layer, allow to guarantee profile at outer surface lay glass felt.）
(5) assembling
A) adorn a bolt base at distance lip edge line 34mm lower end, processing, finishing, machined surface seals with the J-4 epoxy glue.
(annotate: the air spots that occurs in the processing, edge lamination defect allow to repair with J-4 glue and SW210 .)
B) the air intake duct both ends of the surface are inwardly carved the long position reference line of 10mm.
(annotate: allow the polishing of air intake duct and flange connections, width is 30mm, and the thickness after the polishing is not less than 1.5mm, and after the assembling, two parts are rotatable .)
C) press mould and check the part profile, press pattern and check the part geometry size.
Claims (2)
1. the forming method of the curved fiberglass air intake duct of a S is characterized in that forming method is:
(1) paving of formpiston inner liner
A) four layers of SW210/J-4 high intensity glass fiber cloth of paving cloth on formpiston, wherein be close to the two-layer of formpiston for putting in order cloth, the laying method of two outside layers is: the 3rd layer is separation with mold center's line, 20mm simultaneously successively decreases on both sides, the 4th layer is separation with mold center's line, and 40mm simultaneously successively decreases on both sides; Every layer of part every layer gel content in the process of paving is controlled at 40-50%; The innermost layer gel content is increased to 60%, forms surperficial resin-rich layer, so that surfacing is smooth;
B) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
C) cut the demoulding from mold center's line, carry out sign at the tangent plane place before cutting, but several lines of vertical mold center line drawing, so that involutory after cutting;
(2) combination that resets of liner
The incision of lining in the face of closing, is inboardly fixed with adhesive tape;
B) on the incision face of lining paving successively wide be the SW210/J-4 high intensity glass fiber cloth cloth of 60mm and 100mm, make the opposite joint on the incision face compound, and both sides respectively overlap 10mm;
C) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
Near the lip local paving
A) be lip wall thickness peak from lip edge line 92mm, being benchmark to both sides ladder layer herein, every layer the size 5mm that successively decreases, shop layer divide and carry out for three times, spread 15 layers for the first time, spread 16 layers for the second time, spread 15 layers for the third time, all need be cured and polish at every turn;
B) cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, and 2-3h;
C) record is carried out in correction of the flank shape and measure gauge;
(4) former matched moulds
A) the whole cloth of the two-layer SW210/J-4 of paving requires overlap joint 15-20mm;
B) blank that paving is good is put into former before above-mentioned two-layer SW210/J-4 cloth is uncured, requires to aim at the peak position of upper and lower, left and right side;
C) matched moulds, and use clamp, cold curing 24h or heating cure, heating cure are after cold curing is no less than 3h, 80 ℃-100 ℃, 2-3h after guaranteeing above-mentioned shop layer, allows to guarantee profile at outer surface lay glass felt;
(5) assembling
A) adorn a bolt base at distance lip edge line 34mm lower end, processing, finishing, machined surface seals with the J-4 epoxy glue; The air spots that occurs in the processing, edge lamination defect allow to repair with J-4 glue and SW210;
B) the inside 10mm of air intake duct both ends of the surface position groove allows the polishing of air intake duct and flange connections, and width is 30mm, and the thickness after the polishing is not less than 1.5mm, and after the assembling, two parts are rotatable;
C) press mould and check the part profile, press pattern and check the part geometry size.
2. the forming method of the curved fiberglass air intake duct of S according to claim 1 is characterized in that described J-4 prescription is 5 parts of 100 parts of EPO1441-310 resins, 10-12 parts of triethylene tetramines and O-phthalic base dibutylesters by weight.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100910802A CN102225623A (en) | 2011-04-12 | 2011-04-12 | Forming method of S-bend fiber reinforced plastic (FRP) air inlet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2011100910802A CN102225623A (en) | 2011-04-12 | 2011-04-12 | Forming method of S-bend fiber reinforced plastic (FRP) air inlet |
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| CN102225623A true CN102225623A (en) | 2011-10-26 |
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| CN2011100910802A Pending CN102225623A (en) | 2011-04-12 | 2011-04-12 | Forming method of S-bend fiber reinforced plastic (FRP) air inlet |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691765A (en) * | 2013-12-09 | 2015-06-10 | 成都飞机工业（集团）有限责任公司 | Composite material integrated air inlet way |
| CN106393743A (en) * | 2016-11-30 | 2017-02-15 | 江西洪都航空工业集团有限责任公司 | Composite material intake way forming mold |
| CN108790210A (en) * | 2017-04-28 | 2018-11-13 | 深圳光启高等理工研究院 | Composite material air intake duct and preparation method thereof and aircraft |
| CN109367052A (en) * | 2018-10-17 | 2019-02-22 | 江西洪都航空工业集团有限责任公司 | A kind of dissection type liner glass reinforced plastic S type air intake duct forming method |
| CN110815900A (en) * | 2019-10-11 | 2020-02-21 | 中国直升机设计研究所 | Surface pressure measurement model blade forming method |
| CN113427793A (en) * | 2021-05-24 | 2021-09-24 | 航天特种材料及工艺技术研究所 | High-strength high-temperature-resistant composite material air inlet channel and forming method thereof |
| CN114162336A (en) * | 2021-12-14 | 2022-03-11 | 北京机电工程研究所 | Aircraft radar stealth air inlet duct and preparation method thereof |
Citations (4)
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|---|---|---|---|---|
| US4124678A (en) * | 1975-04-11 | 1978-11-07 | Sipler Plastics, Inc. | Method of making tortuous tubular articles |
| EP0577409A1 (en) * | 1992-06-30 | 1994-01-05 | Tonen Corporation | Pipe-like fiber-reinforced plastic structural material and method of manufacturing the same |
| CN1108743A (en) * | 1994-03-18 | 1995-09-20 | 于善杰 | Anti-corrossion metal tube and making method thereof |
| CN101614312A (en) * | 2009-07-22 | 2009-12-30 | 北京玻钢院复合材料有限公司 | A kind of preparation method of composite abrasion-proof elbow |
-
2011
- 2011-04-12 CN CN2011100910802A patent/CN102225623A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4124678A (en) * | 1975-04-11 | 1978-11-07 | Sipler Plastics, Inc. | Method of making tortuous tubular articles |
| EP0577409A1 (en) * | 1992-06-30 | 1994-01-05 | Tonen Corporation | Pipe-like fiber-reinforced plastic structural material and method of manufacturing the same |
| CN1108743A (en) * | 1994-03-18 | 1995-09-20 | 于善杰 | Anti-corrossion metal tube and making method thereof |
| CN101614312A (en) * | 2009-07-22 | 2009-12-30 | 北京玻钢院复合材料有限公司 | A kind of preparation method of composite abrasion-proof elbow |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104691765A (en) * | 2013-12-09 | 2015-06-10 | 成都飞机工业（集团）有限责任公司 | Composite material integrated air inlet way |
| CN106393743A (en) * | 2016-11-30 | 2017-02-15 | 江西洪都航空工业集团有限责任公司 | Composite material intake way forming mold |
| CN108790210A (en) * | 2017-04-28 | 2018-11-13 | 深圳光启高等理工研究院 | Composite material air intake duct and preparation method thereof and aircraft |
| CN109367052A (en) * | 2018-10-17 | 2019-02-22 | 江西洪都航空工业集团有限责任公司 | A kind of dissection type liner glass reinforced plastic S type air intake duct forming method |
| CN110815900A (en) * | 2019-10-11 | 2020-02-21 | 中国直升机设计研究所 | Surface pressure measurement model blade forming method |
| CN110815900B (en) * | 2019-10-11 | 2022-02-18 | 中国直升机设计研究所 | Surface pressure measurement model blade forming method |
| CN113427793A (en) * | 2021-05-24 | 2021-09-24 | 航天特种材料及工艺技术研究所 | High-strength high-temperature-resistant composite material air inlet channel and forming method thereof |
| CN113427793B (en) * | 2021-05-24 | 2022-08-05 | 航天特种材料及工艺技术研究所 | High-strength high-temperature-resistant composite material air inlet channel and forming method thereof |
| CN114162336A (en) * | 2021-12-14 | 2022-03-11 | 北京机电工程研究所 | Aircraft radar stealth air inlet duct and preparation method thereof |
| CN114162336B (en) * | 2021-12-14 | 2024-01-05 | 北京机电工程研究所 | Stealth air inlet channel of aircraft radar and preparation method thereof |
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Application publication date: 20111026 |