CN114131802A - Processing method of U-shaped thin-wall bonding structure - Google Patents
Processing method of U-shaped thin-wall bonding structure Download PDFInfo
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- CN114131802A CN114131802A CN202111398757.7A CN202111398757A CN114131802A CN 114131802 A CN114131802 A CN 114131802A CN 202111398757 A CN202111398757 A CN 202111398757A CN 114131802 A CN114131802 A CN 114131802A
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- Prior art keywords
- adhesive
- shaped
- oil
- heating
- front edge
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4805—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the type of adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/52—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive
- B29C65/526—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding characterised by the way of applying the adhesive by printing or by transfer from the surfaces of elements carrying the adhesive, e.g. using brushes, pads, rollers, stencils or silk screens
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/04—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam
- B29C35/045—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames
- B29C2035/047—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames other than air
- B29C2035/048—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using liquids, gas or steam using gas or flames other than air inert gas
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Oral & Maxillofacial Surgery (AREA)
- Thermal Sciences (AREA)
- Adhesives Or Adhesive Processes (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
The invention provides a processing method of a U-shaped thin-wall bonding structure, which comprises the following steps: sequentially paving the rubber adhesive tape, the heating resistance alloy and the rubber adhesive tape on a U-shaped die, covering the paved parts by adopting a vacuum bag, putting the vacuum bag into an autoclave, and vulcanizing for a first preset time; removing the vacuum bag, coating adhesive on the surface of the outer layer of rubber adhesive tape and covering a nylon net, and infiltrating the nylon net with the adhesive; coating an adhesive on the surface of the nylon net; covering the front edge clad iron on the adhesive; and turning over the part covered with the front edge clad iron, and heating and pressurizing to obtain the U-shaped thin-wall bonding structure. The invention can lead the air bubbles mixed with the adhesive and the air wrapped in when covering the front edge iron wrapping to the outside of the part from the bottom to the top of the U-shaped part along the nylon net when being heated and expanded, thereby obviously reducing the air bubbles mixed with the adhesive and the air wrapped in when covering the front edge iron wrapping, eliminating the bubble defect in the U-shaped thin-wall bonding structure and improving the qualification rate.
Description
Technical Field
The invention relates to the technical field of bonding of composite thin-wall structures in the field of aviation, in particular to a processing method of a U-shaped thin-wall bonding structure.
Background
At present, a heating assembly arranged on the front edge of a helicopter blade is in a multi-layer composite U-shaped thin-wall bonding structure of heating resistance alloy 3, rubber cloth 2 and front edge iron-clad 1 as shown in figure 1. The heating resistor alloy is used for heating after being electrified, ice condensed on the surface of the blade iron cladding in the flight process of the helicopter is removed, and the flight safety is ensured.
Generally, the U-shaped thin-wall bonding structural part is formed by clamping heating resistance alloy between two or more layers of rubber adhesive tapes, laying the heating resistance alloy on a mold 7 shown in figure 2, heating and pressurizing the heating resistance alloy to vulcanize the heating resistance alloy into a whole, coating an adhesive 4 on the surface of the U-shaped thin-wall bonding structural part, covering a front edge iron clad, and heating and pressurizing the whole part structure simultaneously by an autoclave vacuum bag method shown in figure 2 to form the final part structure.
The existing part processing method is to uniformly pressurize the whole surface of the part simultaneously by filling air or nitrogen into a hot pressing tank as a heating and pressurizing medium. In the heating and pressurizing process, bubbles mixed in by the adhesive and air wrapped in when the front edge iron coating is covered cannot be completely discharged, and bubble defects are formed in the U-shaped thin-wall structure in a closed mode.
Disclosure of Invention
The invention provides a processing method of a U-shaped thin-wall bonding structure, which is used for relieving the bubble defect in the U-shaped thin-wall structure in the prior art.
The invention provides a processing method of a U-shaped thin-wall bonding structure, which comprises the following steps:
sequentially paving and pasting the rubber adhesive tape, the heating resistance alloy and the rubber adhesive tape on a U-shaped die, and covering the paved parts by adopting a vacuum bag;
putting the mould and the paved part into an autoclave, and vulcanizing for a first preset time;
removing the vacuum bag, coating adhesive on the surface of the outer layer of rubber adhesive tape and covering a nylon net, and infiltrating the nylon net with the adhesive;
coating an adhesive on the surface of the nylon net;
covering the front edge clad iron on the adhesive;
and turning over the part covered with the front edge clad iron, and heating and pressurizing to obtain the U-shaped thin-wall bonding structure.
Optionally, the part that will be covered with leading edge package iron is overturned, heats the pressurization, includes:
turning over the part covered with the front edge clad iron, and placing the part on a heating and pressurizing device, wherein a U-shaped oil bag is arranged at the top of the heating and pressurizing device, and the opening of the U-shaped oil bag is upward;
and injecting oil into the U-shaped oil bag of the heating and pressurizing device, and heating and pressurizing the part covered with the front edge iron cladding by controlling the temperature and the pressure of the oil.
Optionally, the filling oil into the U-shaped oil sac of the warming and pressurizing device includes:
and oil is injected into the U-shaped oil bag through the oil injection port, and in the oil injection process, the U-shaped oil bag is sequentially contacted with the front edge iron cladding from the bottom to the top side wall to asynchronously heat and pressurize the front edge iron cladding.
Optionally, the heating and pressurizing the part covered with the front-edge iron clad by controlling the temperature and the pressure of the oil includes:
and injecting oil with the temperature of 75 +/-5 ℃ into the U-shaped oil bag, and keeping the pressure in the U-shaped oil bag for a second preset time when the pressure reaches 0.1 +/-0.05 MPa.
Optionally, covering the laid part with a vacuum bag comprises:
and pasting a vacuum bag by using a vacuum bag film, an air-permeable felt and an isolation film, and covering the paved part.
Optionally, the step of placing the mold together with the paved part into an autoclave, and vulcanizing for a first preset time includes:
putting the mould and the paved parts into an autoclave, and vulcanizing for 20-30 minutes at 160 +/-5 ℃ and 0.6 +/-0.05 MPa.
Optionally, the adhesive is a J-200-1A adhesive.
Optionally, the processing method of the U-shaped thin-walled bonding structure further includes:
and (3) cleaning and airing the U-shaped die for more than 1 hour by using an organic solvent, and paving demoulding cloth on the surface of the cleaned U-shaped die.
The invention provides a processing method of a U-shaped thin-wall bonding structure, which comprises the following steps: sequentially paving and pasting the rubber adhesive tape, the heating resistance alloy and the rubber adhesive tape on a U-shaped die, and covering the paved parts by adopting a vacuum bag; putting the mould and the paved part into an autoclave, and vulcanizing for a first preset time; removing the vacuum bag, coating adhesive and nylon net on the surface of the outer layer of rubber adhesive tape, and infiltrating the nylon net with the adhesive; coating an adhesive on the surface of the nylon net; covering the front edge clad iron on the adhesive; and turning over the part covered with the front edge clad iron, and heating and pressurizing to obtain the U-shaped thin-wall bonding structure. The invention can lead the air bubbles mixed with the adhesive and the air wrapped in the front edge iron wrapping to the outside of the part from the bottom to the top of the U-shaped part along the nylon net when the air bubbles mixed with the adhesive and the air wrapped in the front edge iron wrapping are heated and expanded, thereby obviously reducing the air bubbles mixed with the adhesive and the air wrapped in the front edge iron wrapping, eliminating the defect of the air bubbles in the U-shaped thin-wall bonding structure and improving the qualification rate.
Drawings
FIG. 1 is a schematic structural diagram of a conventional U-shaped thin-wall bonding structure;
FIG. 2 is a schematic view of a conventional autoclave vacuum bagging process;
FIG. 3 is a schematic structural diagram of a U-shaped thin-wall bonding structure provided by the present invention;
FIG. 4 is a schematic view of a U-shaped thin-walled bonding structure according to the present invention;
description of reference numerals:
1-iron clad leading edge; 2-rubber rubberized fabric; 3-heat-generating resistance alloy;
4-an adhesive; 5-autoclave; 6-vacuum bag;
7-molding; 8-U-shaped thin-wall bonding structure; 9-nylon mesh;
10-oil pocket; 11-hydraulic oil.
Detailed Description
The following explains the method for processing the U-shaped thin-walled adhesive structure provided by the present invention with reference to the accompanying drawings.
The general technical scheme of the invention is that before coating an adhesive 4, a nylon net 9 is placed on the surface of vulcanized rubber, then the surface is coated with the adhesive, and after covering a front edge iron clad 1, asynchronous heating and pressurizing are carried out on the U-shaped thin-wall structure by using special equipment.
The main process steps of the invention are as follows:
1) mold preparation
Cleaning the mold with acetone or other organic solvent, air drying for more than 1 hr, and spreading a layer of FF03AP demolding cloth on the surface.
2) Laying rubber cloth
And paving a rubber cloth on the mold to enable the mold to be attached to the mold.
3) Laying exothermic resistance alloy
4) Laying rubber cloth
And continuously paving a layer of rubber cloth on the mould to be jointed.
5) Heating and pressurizing for vulcanization
The vacuum bag 6 is pasted by using a vacuum bag film, a ventilated felt, an isolation film and the like, the mould and the paved part are placed into an autoclave 5, and the autoclave is kept for 20 to 30 minutes at the temperature of 160 +/-5 ℃ and the pressure of 0.6 +/-0.05 MPa.
6) Surface brushing glue
After vulcanization, the vacuum bag is removed and a layer of J-200-1A adhesive is applied to the surface using a brush or a rubber blade.
7) Covered nylon net
As shown in fig. 3, a nylon net with a thickness of 0.1mm was covered and brushed or scraped on the surface using a brush or a rubber spatula to wet the nylon net with the adhesive.
8) Surface brushing glue
And coating a layer of J-200-1A adhesive on the surface of the nylon net by using a brush or a rubber scraper.
9) Iron cladding covering front edge
10) Asynchronous heating and pressurizing of special equipment (fig. 4)
The combined U-shaped thin-wall bonding structure 8 is turned over together with the die 7 and fixed on special equipment, hydraulic oil 11 is filled into an oil bag 10 of the special equipment, the middle part of the oil bag is firstly contacted with the top of a part in the oil filling process, the top of the U-shaped thin-wall bonding structure begins to be pressed, the U-shaped thin-wall bonding structure is gradually pressurized from the top (position A) to the middle (position B) and then to the bottom (position C) along with the increase of the hydraulic oil, and meanwhile, the hydraulic oil is heated. When the pressure in the oil sac reaches 0.1 plus or minus 0.05MPa and the temperature reaches 75 plus or minus 5 ℃, the temperature is kept for 55 to 65 minutes, and then the heating and the pressurization are finished.
After the nylon net is covered, the glue is continuously brushed to enable the glue layer to uniformly infiltrate the nylon net; the special equipment realizes asynchronous heating and pressurizing.
Claims (8)
1. A processing method of a U-shaped thin-wall bonding structure is characterized by comprising the following steps:
sequentially paving and pasting the rubber adhesive tape, the heating resistance alloy and the rubber adhesive tape on a U-shaped die, and covering the paved parts by adopting a vacuum bag;
putting the mould and the paved part into an autoclave, and vulcanizing for a first preset time;
removing the vacuum bag, coating adhesive on the surface of the outer layer of rubber adhesive tape and covering a nylon net, and infiltrating the nylon net with the adhesive;
coating an adhesive on the surface of the nylon net;
covering the front edge clad iron on the adhesive;
and turning over the part covered with the front edge clad iron, and heating and pressurizing to obtain the U-shaped thin-wall bonding structure.
2. The method of claim 1, wherein the turning the part covered with the front iron clad and the heating and pressurizing are performed, and the method comprises the following steps:
turning over the part covered with the front edge clad iron, and placing the part on heating and pressurizing equipment, wherein the heating and pressurizing equipment is provided with a U-shaped oil bag, and the opening of the U-shaped oil bag is upward;
and injecting oil into the U-shaped oil bag of the heating and pressurizing device, and heating and pressurizing the part covered with the front edge iron cladding by controlling the temperature and the pressure of the oil.
3. The method of claim 2, wherein the step of filling the U-shaped oil bladder of the warming and pressurizing device with oil comprises:
and oil is injected into the U-shaped oil bag through the oil injection port, and in the oil injection process, the U-shaped oil bag is sequentially contacted with the front edge iron cladding from the bottom to the top side wall to asynchronously heat and pressurize the front edge iron cladding.
4. The method of claim 3, wherein said heating and pressurizing the part covered with the front rim iron by controlling the temperature and pressure of the oil comprises:
and injecting oil with the temperature of 75 +/-5 ℃ into the U-shaped oil bag, and keeping the pressure in the U-shaped oil bag for a second preset time when the pressure reaches 0.1 +/-0.05 MPa.
5. The method of claim 1, wherein covering the laid part with a vacuum bag comprises:
and pasting a vacuum bag by using a vacuum bag film, an air-permeable felt and an isolation film, and covering the paved part.
6. The method of claim 1, wherein placing the mold with the applied part into an autoclave and vulcanizing for a first predetermined length of time comprises:
placing the mould and the paved part into an autoclave, and keeping the mould and the paved part at the temperature of 160 +/-5 ℃ and the pressure of 0.6 +/-0.05 MPa for 20-30 minutes.
7. The method of claim 1, wherein the adhesive is a J-200-1A adhesive.
8. The method of claim 1, further comprising:
and (3) cleaning and airing the U-shaped die for more than 1 hour by using an organic solvent, and paving demoulding cloth on the surface of the cleaned U-shaped die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111398757.7A CN114131802A (en) | 2021-11-23 | 2021-11-23 | Processing method of U-shaped thin-wall bonding structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111398757.7A CN114131802A (en) | 2021-11-23 | 2021-11-23 | Processing method of U-shaped thin-wall bonding structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114131802A true CN114131802A (en) | 2022-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111398757.7A Pending CN114131802A (en) | 2021-11-23 | 2021-11-23 | Processing method of U-shaped thin-wall bonding structure |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB599617A (en) * | 1944-12-28 | 1948-03-17 | Honorary Advisory Council Sci | Method of making electrically heated de-icing devices |
| FR1154081A (en) * | 1955-05-03 | 1958-04-02 | Rotol Ltd | Device for de-icing the blades of propellers, wings or the like and method of manufacture thereof |
| CN106113526A (en) * | 2016-06-17 | 2016-11-16 | 北京宇航高科新材料有限公司 | A kind of implementation method of compartment panel |
| CN106738493A (en) * | 2016-11-29 | 2017-05-31 | 中国直升机设计研究所 | A kind of rotor anti-deicing heating component die assembly and pre-heating system |
| CN106853693A (en) * | 2015-12-08 | 2017-06-16 | 昌河飞机工业（集团）有限责任公司 | A kind of pressue device |
| CN107901436A (en) * | 2017-07-18 | 2018-04-13 | 江西昌河航空工业有限公司 | A kind of U-shaped part adhering method that can exclude paste glue bubble |
| CN109049738A (en) * | 2018-06-16 | 2018-12-21 | 江苏云之尚节能科技有限公司 | A kind of hot pressing overlay film method of forming |
| US20200291783A1 (en) * | 2019-03-15 | 2020-09-17 | Ratier-Figeac Sas | Blade de-icing |
-
2021
- 2021-11-23 CN CN202111398757.7A patent/CN114131802A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB599617A (en) * | 1944-12-28 | 1948-03-17 | Honorary Advisory Council Sci | Method of making electrically heated de-icing devices |
| FR1154081A (en) * | 1955-05-03 | 1958-04-02 | Rotol Ltd | Device for de-icing the blades of propellers, wings or the like and method of manufacture thereof |
| CN106853693A (en) * | 2015-12-08 | 2017-06-16 | 昌河飞机工业（集团）有限责任公司 | A kind of pressue device |
| CN106113526A (en) * | 2016-06-17 | 2016-11-16 | 北京宇航高科新材料有限公司 | A kind of implementation method of compartment panel |
| CN106738493A (en) * | 2016-11-29 | 2017-05-31 | 中国直升机设计研究所 | A kind of rotor anti-deicing heating component die assembly and pre-heating system |
| CN107901436A (en) * | 2017-07-18 | 2018-04-13 | 江西昌河航空工业有限公司 | A kind of U-shaped part adhering method that can exclude paste glue bubble |
| CN109049738A (en) * | 2018-06-16 | 2018-12-21 | 江苏云之尚节能科技有限公司 | A kind of hot pressing overlay film method of forming |
| US20200291783A1 (en) * | 2019-03-15 | 2020-09-17 | Ratier-Figeac Sas | Blade de-icing |
Non-Patent Citations (1)
| Title |
|---|
| 刘达经: "直升机旋翼桨叶电加热除冰设计" * |
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