CN110588020A - Automatic tape laying method for hexagonal hole of composite material - Google Patents
Automatic tape laying method for hexagonal hole of composite material Download PDFInfo
- Publication number
- CN110588020A CN110588020A CN201910775965.0A CN201910775965A CN110588020A CN 110588020 A CN110588020 A CN 110588020A CN 201910775965 A CN201910775965 A CN 201910775965A CN 110588020 A CN110588020 A CN 110588020A
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- Prior art keywords
- laying
- hexagonal
- mold
- automatic
- belt
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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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/38—Automated lay-up, e.g. using robots, laying filaments according to predetermined patterns
- B29C70/386—Automated tape laying [ATL]
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3076—Aircrafts
- B29L2031/3085—Wings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Robotics (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an automatic tape laying method for hexagonal holes made of composite materials, which comprises the following steps: a. chamfering the hexagonal edge to form a mold with hexagonal hole positioning, and fixedly paving the mold on the upper surface of a tool table through demolding cloth by adopting the projection of a laser projector; b. leading out the unidirectional prepreg with the resin content of 34% from a freezer, and loading the unidirectional prepreg onto a U shaft of a material roll of an automatic tape laying machine; c. heating to 60 ℃, wherein the laying angle precision of the material belt is +/-1 DEG, the gap value is set to be 1mm, an automatic belt laying machine lays the pre-impregnated material belt on the outer surface of the hexagonal hole positioning hole on the die to form a material layer, and the hexagonal hole positioning hole and the material layer are packaged in a vacuum bag, vacuumized and compacted; d. sending the parts into an autoclave to cure and mold the parts; e. and opening the mold, and taking out the solidified and molded material layer to obtain the finished part. The problem of automatic belt laying of the hexagonal hole design of the composite material component can be solved.
Description
Technical Field
The invention belongs to the technical field of automatic tape laying of composite materials, and particularly relates to an automatic tape laying method of hexagonal holes of composite materials.
Background
The characteristic structures in the wing skin comprise hexagonal holes, densely-lost layers of layers, zigzag layers and the like, and the feasibility of the automatic tape laying technology of the wing skin is required to be realized, so that the conventional automatic tape laying machine of a company is expanded and applied to the laying process of upper and lower skins of an engineering composite material wing, the automatic production of the wing skin is realized, and the production efficiency is improved.
Because the hole site design in the combined material part is for the aircraft subtracts the heavy or installation cable pipeline of plane, if use manual lay part, need with the help of blanking machine accurate cutting the tablet and the hole site of each layer of laying, then with the help of laser projector with the part lay the shape profile projection on frock laying profile, manual one-by-one lays the completion. The method is characterized in that an automatic tape laying machine is used for laying, an automatic blanking process is cancelled, hole sites of a material tape are cut by the automatic tape laying machine in a one-step method, the material tape is attached to a tool profile under the traction of an automatic tape laying press shoe or a press roller and a back lining paper, then the material tape is laid on the tool profile, and the cut hole sites can slide to a certain extent when attached to the tool profile under the traction of the press shoe or the press roller and the back lining paper, so that a method is needed for ensuring that a wing skin hexagonal hole is efficiently and accurately laid by the automatic tape laying machine, and the quality requirements of an automatic tape laying process on no bridge, no lap and no wrinkle can be met.
Disclosure of Invention
In order to solve the problems, the invention provides an automatic tape laying method for a hexagonal hole of a composite material, which can solve the problem of automatic tape laying of the design of the hexagonal hole of a composite material component.
The invention is realized by the following technical scheme.
An automatic tape laying method for hexagonal holes of composite materials is characterized in that: the method comprises the following steps:
a. chamfering the hexagonal edge to form a mold with hexagonal hole positioning, and fixedly paving the mold on the upper surface of a tool table through demolding cloth by adopting the projection of a laser projector;
b. leading out the one-way prepreg with 34 percent of resin content from a freezing warehouse, unfreezing the one-way prepreg in a purification room for more than 6 hours until the material belt packaging bag has no water vapor drop, and loading the material belt packaging bag onto a U shaft of a material coil of an automatic tape laying machine;
c. heating to 60 ℃, wherein the laying angle precision of the material belt is +/-1 DEG, the gap value is set to be 1mm, the laying parameter speed on an automatic tape laying machine is less than or equal to 20m/min, the pressure of a compression roller is 5bar, the length of the compression roller can be 75-150mm, the automatic tape laying machine lays the pre-impregnated material belt on the outer surface of a hexagonal hole positioning hole on a die to form a material layer, pre-compacting the material layer to form a material layer, and packaging the hexagonal hole positioning hole and the material layer in a vacuum bag for vacuumizing and compacting;
d. sending the mould and the vacuum bag into an autoclave to solidify and form the part;
e. and after the solidification and the forming are finished, opening the mold, and taking out the solidified and formed material layer to obtain a finished part.
The demolding cloth is made of polytetrafluoroethylene.
The compression roller is made of silicon rubber or rubber materials.
The invention has the beneficial effects.
1. By designing the auxiliary plate with the oblique angle and gradient hexagonal holes, the thickness of the auxiliary plate is consistent with the thickness value of the hole site of the composite member, the processing parameter values (tape laying speed and pressure value of a press roll) of the automatic tape laying machine are determined, an automatic tape laying program is compiled, the automatic tape laying method which meets the process quality of the holes without bridges, lap joints and wrinkles is realized, the process method technology of an auxiliary laying die is added aiming at the complexity and the particularity of the hexagonal holes of the composite material, the process scheme of laying the hexagonal holes of the composite material is perfected, the structural position precision of the laying hole sites of automatic equipment is improved, the problem of inaccurate laying of the hole positions caused by the slippage of the material tapes when the hole structures are automatically laid is solved, the problems of inaccurate automatic laying positioning of the hole corners of the parts and the irregular inner cavity of the parts after solidification are solved by adopting the positioning and the positioning of the hexagonal die, and the problem of compaction and deformation by adopting, the method for fixing the positions of the holes by using the demolding cloth solves the problem of unloading the mold, and simultaneously improves the quality of the inner surface and the outer surface of the part by using the mold for curing molding.
2. The polytetrafluoroethylene material has the characteristics of high temperature resistance, extremely low friction coefficient, good lubricating effect, acid resistance, alkali resistance and various organic solvents resistance, is almost insoluble in all solvents, and has large thermal expansion.
3. The silicon rubber or the insulator with good wear resistance, aging resistance and flexibility is used.
FIG. 1 is a schematic view of the release fabric of the present invention when laid.
Fig. 2 is a view of the present invention in laying up a strip of material.
Reference numerals: 1. the method comprises the following steps of a tooling table, 2, a die, 3, a demolding cloth, 4, laser projector projection, 5 and a material belt.
Detailed Description
Example 1
As shown in fig. 1, an automatic tape laying method for hexagonal holes of composite materials comprises the following steps:
a. chamfering the hexagonal edge to form a mold 2 with hexagonal hole positioning, and fixedly paving the mold 2 on the upper surface of the tooling table 1 through a demolding cloth 3 by adopting the projection of a laser projector;
b. leading out the one-way prepreg with 34 percent of resin content from a freezing warehouse, unfreezing for more than 6 hours in a purification room until no water vapor drops exist in the packaging bag of the material belt 5, and loading the material belt on a U shaft of a material coil of an automatic tape laying machine;
c. heating to 60 ℃, wherein the laying angle precision of the material belt 5 is +/-1 DEG, the gap value is set to be 1mm, the laying parameter speed on the automatic belt laying machine is less than or equal to 20m/min, the pressure of a press roller is 5bar, and the length of the press roller can be 75-150mm, as shown in figure 2, the automatic belt laying machine lays the pre-impregnated material belt 5 on the outer surface of the hexagonal hole positioning hole on the die 2 to form a material layer, pre-compacting the material layer to form a material layer, and packaging the hexagonal hole positioning hole and the material layer in a vacuum bag for vacuumizing and compacting;
d. the mould 2 and the vacuum bag are sent into an autoclave to solidify and form the part;
e. and after the solidification and the forming are finished, opening the mold, and taking out the solidified and formed material layer to obtain a finished part.
By designing the auxiliary plate with the oblique angle and gradient hexagonal holes, the thickness of the auxiliary plate is consistent with the thickness value of the hole site of the composite member, the processing parameter values (tape laying speed and pressure value of a press roll) of the automatic tape laying machine are determined, an automatic tape laying program is compiled, the automatic tape laying method which meets the process quality of the holes without bridges, lap joints and wrinkles is realized, the process method technology of an auxiliary laying die is added aiming at the complexity and the particularity of the hexagonal holes of the composite material, the process scheme of laying the hexagonal holes of the composite material is perfected, the structural position precision of the laying hole sites of automatic equipment is improved, the problem of inaccurate laying of the hole positions caused by the slippage of the material tapes when the hole structures are automatically laid is solved, the problems of inaccurate automatic laying positioning of the hole corners of the parts and the irregular inner cavity of the parts after solidification are solved by adopting the positioning and the positioning of the hexagonal die, and the problem of compaction and deformation by adopting, the method for fixing the positions of the holes by the demolding cloth solves the problem of unloading the mold, and the mold 2 is adopted for solidification molding, so that the quality of the inner surface and the outer surface of the part is improved.
Example 1
As shown in fig. 1, an automatic tape laying method for hexagonal holes of composite materials comprises the following steps:
a. chamfering a hexagonal edge, wherein in order to improve the tape laying passability of an automatic tape laying press shoe or a press roller, the ratio of a right-angle side to a height right-angle side of a molded surface of a fitting tool is required to be less than or equal to 0.1, so that a mold 2 which can be used for positioning a hexagonal hole is manufactured, a laser projector is used for projection according to a part laying line (the precision of the laser projector is 0.76 mm), the mold 2 is fixedly laid on the upper surface of a tool table 1 through a demolding cloth 3 by adopting the projection of the laser projector, the sliding of the hexagonal hole mold during carrying and laying is prevented, and the accuracy of the laying position of the hole is detected;
b. leading out the one-way prepreg with 34 percent of resin content from a freezing warehouse, unfreezing for more than 6 hours in a purification room until no water vapor drops exist in the packaging bag of the material belt 5, and loading the material belt on a U shaft of a material coil of an automatic tape laying machine;
c. heating to 60 ℃, wherein the laying angle precision of the material belt 5 is +/-1 DEG, the gap value is set to be 1mm, the laying parameter speed on the automatic belt laying machine is less than or equal to 20m/min, the pressure of a press roller is 5bar, and the length of the press roller can be 75-150mm, as shown in figure 2, the automatic belt laying machine lays the pre-impregnated material belt 5 on the outer surface of the hexagonal hole positioning hole on the die 2 to form a material layer, pre-compacting the material layer to form a material layer, and packaging the hexagonal hole positioning hole and the material layer in a vacuum bag for vacuumizing and compacting;
d. the mould 2 and the vacuum bag are sent into an autoclave to solidify and form the part;
e. and after the solidification and the forming are finished, opening the mold, and taking out the solidified and formed material layer to obtain a finished part.
The demolding cloth 3 is made of polytetrafluoroethylene.
The compression roller is made of silicon rubber or rubber materials.
By designing the auxiliary plate with the oblique angle and gradient hexagonal holes, the thickness of the auxiliary plate is consistent with the thickness value of the hole site of the composite member, the processing parameter values (tape laying speed and pressure value of a press roll) of the automatic tape laying machine are determined, an automatic tape laying program is compiled, the automatic tape laying method which meets the process quality of the holes without bridges, lap joints and wrinkles is realized, the process method technology of an auxiliary laying die is added aiming at the complexity and the particularity of the hexagonal holes of the composite material, the process scheme of laying the hexagonal holes of the composite material is perfected, the structural position precision of the laying hole sites of automatic equipment is improved, the problem of inaccurate laying of the hole positions caused by the slippage of the material tapes when the hole structures are automatically laid is solved, the problems of inaccurate automatic laying positioning of the hole corners of the parts and the irregular inner cavity of the parts after solidification are solved by adopting the positioning and the positioning of the hexagonal die, and the problem of compaction and deformation by adopting, the method for fixing the positions of the holes by the demolding cloth solves the problem of unloading the mold, and the mold 2 is adopted for solidification molding, so that the quality of the inner surface and the outer surface of the part is improved.
The polytetrafluoroethylene material has the characteristics of high temperature resistance, extremely low friction coefficient, good lubricating effect, acid resistance, alkali resistance and various organic solvents resistance, is almost insoluble in all solvents, and has large thermal expansion.
The silicon rubber or the insulator with good wear resistance, aging resistance and flexibility is used.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (3)
1. An automatic tape laying method for hexagonal holes of composite materials is characterized in that: the method comprises the following steps:
a. chamfering the hexagonal edge to form a mold (2) with a hexagonal hole for positioning, and fixedly paving the mold (2) on the upper surface of the tooling table (1) through demolding cloth (3) by adopting the projection of a laser projector;
b. leading the unidirectional prepreg with the resin content of 34% out of the freezing warehouse, unfreezing for more than 6 hours in a purification room until the packaging bag of the material belt (5) has no water vapor drop, and loading the unidirectional prepreg onto a U shaft of a material coil of an automatic tape laying machine;
c. heating to 60 ℃, wherein the laying angle precision of the material belt (5) is +/-1 DEG, the gap value is set to be 1mm, the laying parameter speed on an automatic belt laying machine is less than or equal to 20m/min, the pressure of a compression roller is 5bar, the length of the compression roller can be 75-150mm, the automatic belt laying machine lays the presoaked material belt (5) on the outer surface of the hexagonal hole positioning hole on the die (2) to form a material layer, the material layer is formed after pre-compaction, and the hexagonal hole positioning hole and the material layer are packaged in a vacuum bag, vacuumized and compacted;
d. the mould (2) and the vacuum bag are sent into an autoclave to solidify and form the part;
e. and after the solidification and the forming are finished, opening the mold, and taking out the solidified and formed material layer to obtain a finished part.
2. The method for automatically laying the hexagonal holes in the composite material according to claim 1, wherein the method comprises the following steps: the demolding cloth (3) is made of polytetrafluoroethylene.
3. The method for automatically laying the hexagonal holes in the composite material according to claim 1, wherein the method comprises the following steps: the compression roller is made of silicon rubber or rubber materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775965.0A CN110588020A (en) | 2019-08-22 | 2019-08-22 | Automatic tape laying method for hexagonal hole of composite material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910775965.0A CN110588020A (en) | 2019-08-22 | 2019-08-22 | Automatic tape laying method for hexagonal hole of composite material |
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| CN110588020A true CN110588020A (en) | 2019-12-20 |
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| CN201910775965.0A Pending CN110588020A (en) | 2019-08-22 | 2019-08-22 | Automatic tape laying method for hexagonal hole of composite material |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111823612A (en) * | 2020-07-27 | 2020-10-27 | 航天海鹰(镇江)特种材料有限公司 | Material sheet positioning method for paving and pasting on slender flexible mold |
| CN115090831A (en) * | 2022-06-14 | 2022-09-23 | 南京航空航天大学 | Composite material special-shaped revolving body forming method based on 3D printing lightweight sand mold |
| EP4344860A1 (en) * | 2022-09-27 | 2024-04-03 | Airbus Operations, S.L.U. | Lay-up method of composite aircraft parts comprising an opening |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111823612A (en) * | 2020-07-27 | 2020-10-27 | 航天海鹰(镇江)特种材料有限公司 | Material sheet positioning method for paving and pasting on slender flexible mold |
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| CN115090831A (en) * | 2022-06-14 | 2022-09-23 | 南京航空航天大学 | Composite material special-shaped revolving body forming method based on 3D printing lightweight sand mold |
| EP4344860A1 (en) * | 2022-09-27 | 2024-04-03 | Airbus Operations, S.L.U. | Lay-up method of composite aircraft parts comprising an opening |
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Application publication date: 20191220 |
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