CN111572061B - Manufacturing method of fully-adaptive support tool for soft mold auxiliary support - Google Patents
Manufacturing method of fully-adaptive support tool for soft mold auxiliary support Download PDFInfo
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- CN111572061B CN111572061B CN202010453760.3A CN202010453760A CN111572061B CN 111572061 B CN111572061 B CN 111572061B CN 202010453760 A CN202010453760 A CN 202010453760A CN 111572061 B CN111572061 B CN 111572061B
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- soft mold
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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
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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
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
Abstract
The invention discloses a manufacturing method of a fully adaptive support tool for soft mold auxiliary support. The support tool manufactured by the method has the advantages of good strength, high rigidity and good use effect, and avoids the risk that the web plates are easily folded or buckled when being paved; the supporting device is integrally supported, no fit clearance exists, multiple batches of soft molds can be matched, and the state is stable; the soft mold is combined with the soft mold, so that the operation is simple and convenient, the matching performance is good, and the manufacturing precision and quality of products are ensured; in addition, the composite material supporting tool manufactured by the method can be reused, meanwhile, the prepreg can be adopted for maintenance, the remanufacturing is more convenient, and the production cost and the manufacturing period are effectively reduced.
Description
Technical Field
The invention relates to a manufacturing method of a fully-adaptive support tool for soft mold auxiliary support.
Background
The resin-based carbon fiber composite material has superior performances of high specific strength and specific stiffness, strong designability, good fatigue fracture resistance, corrosion resistance, good dimensional stability and the like, and is a high-performance structural material which is widely applied in the fields of aviation, aerospace, traffic and the like at present. In the molding process of various carbon fiber composite materials, the autoclave process has uniform molding temperature and pressure and good adaptability to parts of different materials, shapes, sizes and structures, thereby becoming one of the main process methods for researching and manufacturing aerospace high-quality composite material components.
With the increasing requirements for strength and rigidity of composite material parts, the structures of the parts are more and more complex, wherein a web structural member with a reinforcing rib assembly is one of typical structural members. In order to improve the precision and the quality of parts, the composite material reinforcing rib structural part is manufactured by adopting a soft die process, the soft die can uniformly and accurately transmit the pressure applied by the autoclave, and the manufactured parts have high dimensional precision, no damage and good quality. However, the soft mold generally has low rigidity, and cannot meet the requirements on paving pressure, vacuum degree and the like in the paving process, and the traditional method adopts metal, wood substitute and the like as the support of the soft mold. The supports are usually manufactured in a numerical control machining mode, and because the outer shapes of the soft molds are influenced by a manufacturing process, the soft molds in different batches have slight difference, and the problem of matching with the supports is difficult to solve; moreover, the metal support tool has high cost and long processing period; the weight is large, the use process is too heavy, and the carrying is not facilitated. In addition, the foam material can also be used as a support material which can be adapted to the production by means of a foaming tool. However, the strength of the supporting structure of the light foam material is poor, the soft mold is easy to collapse in the paving process, the paving surface is uneven, and the web and the flanging area material pieces are easy to have fiber wrinkles or buckling; and the foam support is a split type component, the number is large, the appearance is similar, and the time consumption is too long in the process of combining the foam support with the soft mold. In addition, no matter the metal support or the light foam support, the fit clearance is larger when the combination is carried out, the state stability is poorer, and the manufacturing precision of the product and the forming quality of the product are influenced.
Disclosure of Invention
Aiming at the existing problems, the invention provides a manufacturing method of a fully-adaptive support tool for soft mold auxiliary support, the fully-adaptive support tool is formed by paving and hot-pressing a plurality of layers of composite materials on the basis of a soft mold, is integrally formed without assembly, has no fit clearance, can be accurately adapted to a plurality of batches of soft molds, has good strength, large rigidity and good use effect, and avoids the risk of wrinkles or buckling easily generated by paving and pasting a web plate. The specific technical scheme is as follows:
a manufacturing method of a full-adaptive support tool for soft mold auxiliary support comprises the following steps:
(1) soft mold installation: manufacturing a soft die by adopting a metal dummy part which is completely consistent with the shape of the web structural part with the reinforcing rib assembly; installing the soft mold into a forming mold, installing a baffle of the soft mold forming mold, ensuring the installation in place, and leveling without a gap; or directly adopting a new soft mold without demolding; the surface of the soft film is covered with an isolating layer;
(2) covering with a filling material: selecting a material with good bonding performance with the surface of the soft mold as a filling material, and covering the material on the area of the soft mold used for manufacturing the reinforcing rib assembly in the step (1);
(3) hot compacting of the filling material: packaging the filling material covered in the step (2) on the soft mold by adopting a vacuum bag, and conveying the soft mold into an autoclave for hot compaction to ensure that the filling material is attached to the soft film in place;
(4) paving and supporting tool prepreg: covering a layer of demoulding material on the surface of the filling material subjected to hot compaction in the step (3), then paving and adhering supporting tool prepreg according to a preset paving sequence and layers, and additionally paving layers in the area of the reinforcing rib assembly to improve the supporting strength;
(5) curing and forming a support tool: after the prepreg of the support tool is laid and attached in the step (4), packaging the prepreg on a soft mold forming die by adopting a vacuum bag again, and conveying the prepreg into an autoclave for curing and forming to form the composite material support tool;
(6) demolding: and (5) after solidification and forming, taking out of the tank and cooling, removing a baffle of the soft mold forming mold, and separating the composite material supporting tool from the soft mold and the soft film tool to obtain the fully adaptive supporting tool for the soft mold auxiliary support.
Preferably, in the step (1), the release layer is a release agent, a release cloth, or a release film.
As a preferable technical scheme, in the step (2); the filling material is silicon rubber, and the number of layers covered by the filling material is determined according to the thickness of the ribs of the reinforcing rib component.
As a preferable technical solution, in the step (3), the autoclave process parameters of the hot compaction of the filling material are as follows: the pressure is 300-600 kPa, the temperature is 80-120 ℃, and the time is 60-120 min.
Preferably, in the step (4), the release material is a release cloth or a release film.
In a preferable technical scheme, in the step (4), the number of layers of the prepreg of the paving and supporting tool is 10, and the paving sequence is [0/0/45/45/90] s; the added lay-up in the region of the reinforcing bar assembly is located between the 5 th and 6 th layers.
As a further preferable technical scheme, the number of the added layering layers is 4 or 8; the laying sequence of adding 4 layers is 0/45 s; the laying sequence of adding 8 layers is 0/45/45/0 s.
According to a further preferable technical scheme, the first layer of the laid and supported tool prepreg is a complete laid layer, the lap joint length of the laid and supported material sheets is 13-25 mm, and the first layer is compacted in a vacuum mode, wherein the vacuum degree of the first layer is not lower than 80kPa after the first layer is laid and supported.
According to the preferable technical scheme, the prepreg laying layers of the supporting tool are all made of 12k carbon fiber prepregs.
As a preferable technical scheme, in the step (5), the autoclave process parameters for curing and molding the support tool are as follows: the curing pressure is 600kPa, the curing temperature is 195 ℃, the heating rate is 0.5 ℃/min, and the curing time is 360 min; and when the pressure reaches 140kPa, the vacuum bag is vented to atmosphere and held until curing is complete.
Has the advantages that:
compared with the prior art, the composite material supporting tool manufactured by the method has the following advantages:
(1) compared with the traditional foam support, the composite material support tool manufactured by the method has the advantages of good strength, high rigidity and good use effect, and avoids the risk that the web plates are easily folded or bent when being paved;
(2) the size design of the composite material supporting tool manufactured by the method can be matched with multiple batches of soft molds, and the composite material supporting tool is integrally supported, has no fit clearance and is stable in state; the soft mold is combined with the soft mold, so that the operation is simple and convenient, the matching performance is good, and the manufacturing precision and quality of products are ensured;
(3) the composite material supporting tool manufactured by the method can be used for overturning the soft die, ensures that the soft die is matched with the position of the corresponding forming die, and ensures the size of the molded surface of a product;
(4) the composite material supporting tool manufactured by the method can be reused, meanwhile, the prepreg can be adopted for maintenance, the remanufacturing is more convenient, and the production cost and the manufacturing period are effectively reduced.
Drawings
Fig. 1 is a schematic view of manufacturing a fully adaptive support tool for soft mold auxiliary support according to the present invention.
In the figure: 1. a metal dummy; 2. soft molding; 3. a soft mold forming mold; 4. a baffle plate; 5. an isolation layer; 6. a filler material; 7. a release material; 8. and (4) supporting the tool by the composite material.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the embodiments and the accompanying drawings, and it is to be understood that the described embodiments are merely preferred embodiments of the present invention, rather than all embodiments, and are not intended to limit the present invention in other forms, and that any person skilled in the art may make changes or modifications using the technical contents disclosed. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.
The embodiment is a manufacturing method of a fully adaptive support tool for soft mold auxiliary support, the soft film comprises a soft film of a composite material reinforcing rib structural member with a reinforcing rib section shape of an L shape, a T shape or an omega shape (sandwich structure), and fig. 1 is a soft film support tool of a composite material reinforcing rib structural member with a reinforcing rib section shape of a T shape; the method comprises the following specific steps:
(1) soft mold installation: manufacturing a soft die 2 by adopting a metal dummy part 1 which is completely consistent with the shape of a web structural part with a reinforcing rib component; installing the soft mold 2 into the soft mold forming mold 3, installing the baffle 4 of the soft mold forming mold 3, ensuring the installation in place, and being flat and gapless; or directly adopting a new soft mold 4 without demolding; the surface of the soft film 4 needs to be covered with an isolating layer 5, the isolating layer 5 can be a release agent, release cloth or an isolating film, and the isolating film is preferably used for isolating the subsequent laying layer from the soft film 2.
(2) Covering with a filling material: selecting a material with good bonding performance with the surface of the soft mold 2 as a filling material 6, and covering the filling material on the soft mold 2 in the step (1) to form an area for manufacturing the reinforcing rib assembly; in the embodiment, silicon rubber is selected as a filling material, and the silicon rubber can be completely attached to the surface of the soft mold at high temperature, so that the flatness of the paving surface of the manufactured support tool is ensured; the number of layers covered by the filler material 6 is determined by the rib thickness dimension of the reinforcing bar assembly.
(3) Hot compacting of the filling material: packaging the filling material covered in the step (2) on the soft mold by adopting a vacuum bag, and conveying the soft mold into an autoclave for hot compaction to ensure that the filling material 6 is attached to the soft film 2 in place; the autoclave technological parameters of the hot compaction of the filling material 6 are as follows: the pressure is 300-600 kPa, the temperature is 80-120 ℃, and the time is 60-120 min.
(4) Paving and supporting tool prepreg: covering a layer of demolding material 7 on the surface of the filling material subjected to hot compaction in the step (3), wherein the demolding material 7 can be demolding cloth or an isolating film and is used for isolating the prepreg of the support tool from the silicon rubber filling material; and then laying and adhering the prepreg of the support tool according to a preset laying sequence and the number of layers, and adding laying layers in the area of the reinforcing rib assembly to improve the support strength. The number of layers of the prepreg of the paving and sticking supporting tool is 10, and the paving sequence is [0/0/45/45/90] s; the added layer in the reinforcing rib assembly area is positioned between the 5 th layer and the 6 th layer, the added layer is 4 layers or 8 layers, the laying sequence of the 4 layers is [0/45] s, and the laying sequence of the 8 layers is [0/45/45/0] s. In this embodiment, the prepreg laying layers of the support tool are all made of 12k carbon fiber prepregs. When paving, the first layer is required to be a complete paving layer, the lapping length of the paving material sheet is 13-25 mm, and vacuum compaction with the vacuum degree not lower than 80kPa is required after the first layer is paved.
(5) Curing and forming a support tool: after the prepreg of the support tool in the step (4) is laid and attached, packaging the prepreg on a soft mold forming die by adopting a vacuum bag again, and conveying the prepreg into an autoclave for curing and forming to form a composite material support tool 8; the autoclave process parameters for curing and molding the support tool are as follows: the curing pressure is 600kPa, the curing temperature is 195 ℃, the heating rate is 0.5 ℃/min, and the curing time is 360 min; and when the pressure reaches 140kPa, the vacuum bag is vented to atmosphere and held until curing is complete.
(6) Demolding: and (5) after solidification and forming, taking out of the tank and cooling, removing a baffle of the soft mold forming mold, and separating the composite material supporting tool from the soft mold and the soft film tool to obtain the fully adaptive supporting tool for the soft mold auxiliary support.
The fully-adaptive support tool manufactured by the method can be repeatedly used for dozens of times to hundreds of times according to different used materials and processes, if the tool is damaged or deformed, the damaged or deformed area can be maintained by adopting corresponding carbon fiber prepreg, and a metal dummy part and a forming die can be used for manufacturing again. Compared with the traditional foam support, the composite material support tool manufactured by the method has the advantages of good strength, high rigidity and good use effect, and avoids the risk that the web plates are easily wrinkled or buckled when being paved; the tool is designed to be matched with multiple batches of soft dies and integrally supported, so that a fit clearance does not exist, and the state is stable; the soft mold is combined with the soft mold, so that the operation is simple and convenient, the matching performance is good, and the manufacturing precision and quality of products are ensured; in addition, the composite material supporting tool manufactured by the method can be repeatedly used, the maintenance and the secondary manufacturing by adopting the prepreg are more convenient, and the production cost and the manufacturing period are effectively reduced.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, this does not include only a single embodiment, but rather such description is for clarity only, and those skilled in the art will recognize that the embodiments described herein may be combined with any other embodiment known in the art and known in the art, and that other embodiments may be realized by those skilled in the art.
Claims (7)
1. The utility model provides a manufacturing method that is used for soft mould auxiliary stay's full adaptation to support frock which characterized in that: the method comprises the following steps:
(1) soft mold installation: manufacturing a soft die by adopting a metal dummy part which is completely consistent with the shape of the web structural part with the reinforcing rib assembly; installing the soft mold into a forming mold, installing a baffle of the soft mold forming mold, ensuring the installation in place, and leveling without a gap; or directly adopting a new soft mold without demolding; the surface of the soft mould is covered with an isolating layer;
(2) covering with a filling material: selecting a material with good bonding performance with the surface of the soft mold as a filling material, and covering the material on the area of the soft mold used for manufacturing the reinforcing rib assembly in the step (1);
(3) hot compacting of the filling material: packaging the filling material covered in the step (2) on the soft mold by adopting a vacuum bag, and conveying the soft mold into an autoclave for hot compaction to ensure that the filling material is attached to the soft film in place;
(4) paving and supporting tool prepreg: covering a layer of demoulding material on the surface of the filling material subjected to hot compaction in the step (3), then paving and adhering supporting tool prepreg according to a preset paving sequence and layers, and additionally paving layers in the area of the reinforcing rib assembly to improve the supporting strength; the number of layers of the prepreg of the paving and sticking supporting tool is 10, and the paving sequence is [0/0/45/45/90] s; the added ply in the region of the reinforcing bar assembly is located between the 5 th and 6 th plies; the number of the added layering layers is 4 or 8; the laying sequence of adding 4 layers is 0/45 s; the laying sequence of adding 8 layers is 0/45/45/0 s; the first layer of the laying and supporting tool prepreg is a complete laying layer, the lapping length of the laying and supporting material sheet is 13-25 mm, and the first layer is compacted in a vacuum mode, wherein the vacuum degree is not lower than 80kPa after laying;
(5) curing and forming a support tool: after the prepreg of the support tool is laid and attached in the step (4), packaging the prepreg on a soft mold forming die by adopting a vacuum bag again, and conveying the prepreg into an autoclave for curing and forming to form the composite material support tool;
(6) demolding: and (5) after solidification and forming, taking out of the tank and cooling, removing a baffle of the soft mold forming mold, and separating the composite material supporting tool from the soft mold and the soft film tool to obtain the fully adaptive supporting tool for the soft mold auxiliary support.
2. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: in the step (1), the isolation layer is a release agent, release cloth or an isolation film.
3. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: in the step (2); the filling material is silicon rubber, and the number of layers covered by the filling material is determined according to the thickness of the ribs of the reinforcing rib component.
4. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: in the step (3), the autoclave technological parameters of the hot compaction of the filling material are as follows: the pressure is 300-600 kPa, the temperature is 80-120 ℃, and the time is 60-120 min.
5. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: in the step (4), the demolding material is demolding cloth or an isolating film.
6. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: and the prepreg paving layers of the support tool are all made of 12k carbon fiber prepregs.
7. The manufacturing method of the fully-adaptive support tool for the soft mold auxiliary support according to claim 1, characterized in that: in the step (5), the autoclave process parameters for curing and molding the support tool are as follows: the curing pressure is 600kPa, the curing temperature is 195 ℃, the heating rate is 0.5 ℃/min, and the curing time is 360 min; and when the pressure reaches 140kPa, the vacuum bag is vented to atmosphere and held until curing is complete.
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| CN110815854A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method and application of flexible tool for molding longitudinal and transverse T-shaped reinforcing rib workpieces |
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| CN110815854A (en) * | 2019-11-26 | 2020-02-21 | 航天海鹰(镇江)特种材料有限公司 | Manufacturing method and application of flexible tool for molding longitudinal and transverse T-shaped reinforcing rib workpieces |
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