CN117484911A - Forming device and forming method for composite flange cylinder - Google Patents
Forming device and forming method for composite flange cylinder Download PDFInfo
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- CN117484911A CN117484911A CN202311602869.9A CN202311602869A CN117484911A CN 117484911 A CN117484911 A CN 117484911A CN 202311602869 A CN202311602869 A CN 202311602869A CN 117484911 A CN117484911 A CN 117484911A
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- 239000002131 composite material Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 27
- 239000011347 resin Substances 0.000 claims description 16
- 229920005989 resin Polymers 0.000 claims description 16
- 238000000465 moulding Methods 0.000 claims description 13
- 238000010438 heat treatment Methods 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 238000010030 laminating Methods 0.000 claims description 10
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 6
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000047 product Substances 0.000 description 21
- 230000008569 process Effects 0.000 description 12
- 230000002411 adverse Effects 0.000 description 6
- 238000007906 compression Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 4
- 239000000835 fiber Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000037303 wrinkles Effects 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 238000001879 gelation Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
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- 239000007787 solid Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
-
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulding By Coating Moulds (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides a forming device and a forming method of a composite flange cylinder, wherein the forming device comprises a forming die and a die frame; the forming die comprises an expansion soft die for laying a prepreg layer; the detachable side splicing blocks are arranged on the outer side of the expansion soft mold in a surrounding mode, and are used for wrapping the outer side surfaces of the prepreg paving layers, and the top parts of the side splicing blocks are higher than the expansion soft mold; a bottom plate for placing the expansion soft mold and the side blocks; the cover plate is detachably arranged on the expansion soft die and the side splicing blocks, and a boss attached to the top surface of the expansion soft die is arranged on the lower surface of the cover plate; a backing plate which is detachably arranged on the top surface of the cover plate; the die frame comprises an outer frame and an inclined wedge component; the outer frame is provided with an accommodating cavity with an open upper end, and the forming die is arranged in the accommodating cavity; the wedge component is detachably inserted into the accommodating cavity, surrounds the outer side surface of the forming die, applies force to the forming die in the circumferential direction, and assists the side splicing block to be clamped. The forming device disclosed by the invention combines rigid pressurization with soft mold expansion pressurization properly, so that reasonable pressurization of the whole structure can be realized, and the product forming effect is good.
Description
Technical Field
The invention belongs to the technical field of material forming, and particularly relates to a forming device and a forming method of a composite flange cylinder.
Background
The small-sized composite material flange cylinder body is a composite material connecting structure widely used in the fields of aviation, aerospace and the like, and the cylinder body can be used for installing various devices and structures, such as a small-sized aerospace attitude control engine, a sensing device, communication equipment, a cantilever, a connecting rod and the like; the flange is fixed with the main body structure through a fastener. Because the flange is small in width and has more screw holes, the flange needs to be reinforced, so that the thickness of the flange is obviously larger than that of the cylinder body, for example, when the thickness of the cylinder body is 2-4 mm, the thickness of the flange can correspondingly reach 8-12 mm; because the diameter of the cylinder body of the small flange cylinder body is smaller, for example, only 100mm, namely, the curvature of the cylinder body is large. Therefore, the small composite material flange cylinder body has the characteristics of small cylinder body diameter, large curvature, large flange thickness and small cylinder body thickness, and the cylinder body thickness and the flange thickness have larger difference. This results in difficulties in the overall pressurization of the structure during fabrication of the small composite flanged cylinder.
The prior art generally uses rigid molds and is pressurized by presses, autoclave, or by thermal expansion generated when the expansion soft mold is warmed up. The rigid mold is adopted to provide sufficient curing pressure for the flange with large thickness, but bridging is easy to occur at the position of the large-curvature cylinder body, and bridging is easy to occur at the joint of the flange and the cylinder body due to severe wall thickness change and large compression difference. The expansion soft die has better adaptability to large curvature and large compression amount, and bridge bridging risks hardly exist, but the requirement on the thickness of the soft die at the corresponding position is very large due to the large compression amount of the flange, meanwhile, the soft die at the flange is connected with the cylinder body, the expansion between the flange and the cylinder body inevitably generates mutual influence, and the flange is extruded into the cylinder body along with the expansion process, so that the cylinder body forming pressure is overlarge, and the flange forming pressure is insufficient.
Disclosure of Invention
In order to solve the technical problem that the integral pressurization of the structure is difficult in the manufacturing process of the small-sized composite material flange cylinder, the invention provides the forming device of the composite material flange cylinder, which has reasonable structural design, proper combination of rigid pressurization and soft mold expansion pressurization, good adaptability, realization of reasonable pressurization of the integral structure, good product forming effect and accurate external dimension; meanwhile, a forming method of the composite material flange cylinder based on the forming device is also provided.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
the invention provides a forming device of a composite material flange cylinder body, which comprises a forming die and a die frame;
the forming die comprises an expansion soft die, side blocks, a bottom plate, a cover plate and a base plate;
the expansion soft die comprises a cylindrical section and a flange section arranged at the top of the cylindrical section, wherein the outer side surface of the cylindrical section and the lower side surface of the flange section are used for paving prepreg layers; the side splice blocks are arranged in a plurality, are detachably and circumferentially arranged on the outer side of the expansion soft die in a surrounding mode, and can cover the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange of the prepreg layer, and the top of each side splice block is higher than the expansion soft die; the bottom plate is used for placing the expansion soft mold and the side blocks; the lower surface of the cover plate is provided with a boss, the cover plate is detachably covered on the expansion soft die and the side splicing blocks, the lower surface of the boss is attached to the top surface of the expansion soft die, and the base plate is covered on the top surface of the cover plate; the shape and the size of the bottom plate, the cover plate and the backing plate on the horizontal plane are the same as those of the combined body formed by the side assembly blocks after the side assembly blocks are assembled;
the die frame comprises an outer frame and an inclined wedge assembly;
the outer frame is of a rigid structure and is provided with an accommodating cavity with an open upper end; the forming die is arranged in the accommodating cavity; the plurality of wedge assemblies are detachably inserted into the accommodating cavity, are arranged on the outer side surface of the forming die in a surrounding mode, apply force to the side splice blocks in the circumferential direction, and assist the side splice blocks to be clamped;
after the forming device is integrally assembled, the top of the forming die and the top of the die frame are leveled.
The composite material flange cylinder product is formed by prepreg layering and curing, the main body of the composite material flange cylinder product is an annular thin-wall cylinder section, and one side of the cylinder section is provided with an annular flange in an everting mode. The product is obtained by paving a plurality of layers of prepreg layers by composite material prepregs layer by layer, heating by a hot press, pressurizing, closing the die and curing;
paving prepreg layers on the outer side surface of the cylindrical section and the lower side surface of the flange section of the expansion soft mold; the expansion soft mould is made of a material with a larger thermal expansion coefficient, such as high-temperature resistant silicon-based rubber, and is heated to expand at high temperature in the curing and heating process, so that pressure is generated on the prepreg ply from the inner side, and the prepreg ply is compacted; the outer diameter of the cylindrical section of the expansion soft mold just expands to be consistent with the inner diameter of the cylinder body of the product under the condition of resin gel or solidification temperature; since the resin gel temperature is generally significantly higher than the production environment temperature (hereinafter referred to as normal temperature), the outer diameter of the cylindrical section of the expansion soft mold should be slightly smaller than the inner diameter of the cylindrical section of the prepreg layup at normal temperature, i.e. negative thermal compensation of the soft mold is required. The specific compensation size is closely related to the properties of the soft mold material, such as expansion coefficient and modulus, and the prepreg layering properties, such as gel curing temperature, required molding pressure and the like, the specific algorithm is an existing calculation mode and needs to be calculated according to actual conditions, the description of the technical scheme of the invention is not influenced, and the description is not repeated;
the side splicing blocks are surrounded in a segmented way, and an inner cavity formed after the side splicing blocks are combined can cover the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange of the prepreg layer; the side splice is used for providing rigid support for the outer side of the cylinder section of the prepreg ply and the lower part of the flange (namely, the opposite side of the expansion soft mold) and providing reaction force for the expansion of the soft mold, and the top of the side splice is arranged in a mode higher than the expansion soft mold, so that the side splice can limit the movement of the cover plate in the vertical direction, avoid over-compression of the expansion soft mold and further over-compress the flange part of the prepreg ply; the side splice must be arranged into a multi-block combination and sectionally surrounded into a combined structure, because the prepreg ply formed by the composite material is generally compressed in the curing process, so that the thickness of the prepreg ply before curing is larger than the thickness of the prepreg ply after curing, the outer diameter of the barrel section of the target prepreg ply before curing is larger than the outer diameter of the barrel section of the target prepreg ply after curing (namely, the theoretical outer diameter), and because of the trend, the side splice needs sectionally surrounded, otherwise, after the prepreg ply is laid, the expansion soft mold paved with the prepreg ply cannot be placed in the inner cavity surrounded by the side splice; the side blocks are pressed in the circumferential direction to complete die assembly, after the prepreg is paved, the overall dimension of a combined body formed after the side blocks are matched in the horizontal plane is consistent with the overall dimension of the bottom plate;
the bottom plate is mainly provided with an expansion soft mold, side blocks and a prepreg layer, wherein the prepreg layer is positioned in a cavity formed by the bottom plate, the expansion soft mold and the side blocks; the bottom plate is used for placing all parts of the forming die, so that the die is convenient to assemble and transport, besides, the bottom plate can provide bottom surface support for the whole forming die assembly, so that the bottom plate can be integrally transported, and limit can be formed on the wedge assembly of the die frame, so that after the wedge assembly is assembled, the side assembly blocks are just pushed to the theoretical positions of the side assembly blocks;
the cover plate and the backing plate are combined and used for pressurizing the top surface of the flange of the prepreg ply through the expansion soft die; the solid boss in the center of the cover plate is used for applying pressure to the expansion soft die and transmitting the pressure to the flange surface of the prepreg ply through the expansion soft die; limiting the downward compaction limit of the cover plate through the top surfaces of the side splicing blocks around the boss, so as to avoid excessive compression of the prepreg ply flange; the reason for setting the backing plate is that in the curing stage, the wedge assembly is pressurized by the press firstly, so that the side splice blocks around the cylinder section are clamped, but the cover plate cannot be clamped, if the side splice blocks and the cover plate are clamped simultaneously, the curing pressure at the flange is easily transmitted to the cylinder section of the prepreg paving layer through the expansion soft mold, so that the side splice block is expanded outwards, the clamping of the side splice blocks is affected, and the cover plate is not contacted with the pressure head of the press by removing the backing plate, so that the flange part is not subjected to external pressure when the side splice blocks are clamped, and the problems are solved; after the side splice blocks are assembled, installing a backing plate, and pressurizing the backing plate by a press head to realize pressurizing of the prepreg ply flange part, wherein when the molding device is completely assembled, the top surface of the backing plate is just flush with the top surface of the mold frame, and the specific working process is shown in the molding method part and is not repeated herein;
in the prior art, when the flange is pressurized by fully relying on the expansion soft mold, the soft mold at the flange part in the mode needs to be very thick and is integrally connected with the soft mold corresponding to the cylinder body, so that the soft mold at the flange part is easy to squeeze into the cylinder body along with the expansion process, the forming pressure of the cylinder body is overlarge, and the forming pressure of the flange is insufficient; thus, the invention adopts a combined pressurizing mode at the flange: the corresponding expansion soft mould at the flange is thinned and the cover plate and the backing plate are pressed; the thickness of the flange of the expansion soft die is reduced, so that adverse effects of the ultra-thick expansion soft die at the flange on the barrel body in the expansion process are greatly reduced; because the soft mold at the flange is thinned, the situation of obviously insufficient expansion pressure can occur, the cover plate and the backing plate are adopted to press the expansion soft mold, the pressure is transmitted to the surface of the flange through the soft mold, the pressure deficiency caused by the thinning of the soft mold at the flange is made up, and the molding pressure can meet the requirement;
the side splice blocks are arranged in a sectionalized surrounding mode, so that circumferential rigid constraint cannot be formed on the product, the die assembly stage cannot be in a die assembly state, and the die assembly can be performed only by circumferential pressure, so that the die frame is required to be arranged for limiting and assisting in die assembly;
in the forming device, the cylinder body and the flange are respectively matched with each other: after the prepreg is laid, placing an expansion soft mold paved with the prepreg layer on a bottom plate, surrounding side blocks, and coating the outer side face of a cylinder body, the lower surface of a flange and the outer side face of the flange of the prepreg layer, wherein the side blocks do not compress the prepreg layer at the moment, are in an unclamped state, and the outer side is slightly protruded; covering the cover plate, wherein the lower surface of a boss of the cover plate is attached to the top surface of the expansion soft die, and the cover plate does not press the expansion soft die and the side splicing blocks at the moment; the forming die is placed in the accommodating cavity of the outer frame without installing a base plate, and the inclined wedge component is inserted around the periphery of the side splicing block; the inclined wedge assembly is completely pressed into the accommodating cavity through the press, the side splicing blocks are subjected to the force application of the inclined wedge assembly, and the side splicing blocks are clamped (clamping of the cylinder body part), so that the flange part of the prepreg ply is not subjected to external pressure and cannot cause adverse effect on the cylinder body clamping because the cover plate is not contacted with the press head of the press; after the side splicing block is clamped, a backing plate is installed, a pressure head applies force to the backing plate, the cover plate compresses downwards, pressure is further applied to the flange part of the prepreg ply, and the cover plate is clamped, so that the clamping of the flange part is completed; through above-mentioned forming device and corresponding compound die mode, not only can guarantee that the stack shell is fully compound die, pressurized, can also guarantee that flange department obtains sufficient shaping pressure, simultaneously greatly alleviate the influence of inflation soft mould flange position to the stack shell, improve shaping quality.
In some preferred embodiments of the composite flanged cylinder forming apparatus of the invention, the forming die further comprises a positioning mandrel; a through hole is formed in the central shaft of the expansion soft die, and a blind hole is formed in the center of the bottom plate; the positioning core mold is detachably penetrated in the through hole and inserted into the blind hole.
The positioning core mould is used for realizing the positioning of the expansion soft mould in the horizontal direction; the blind holes (which can not be opened) are arranged on the bottom plate, so that the positioning core mold can be inserted, the positioning and fixing functions are achieved, and the positioning core mold can be prevented from falling off during transferring.
In some preferred embodiments of the apparatus for forming a composite flanged cylinder of the invention, a gap is left between the top surface of the positioning mandrel and the top of the through-hole.
A gap is reserved between the positioning core mould and the top of the through hole, so that errors in the machining and mounting processes are avoided, and the positioning core mould affects the closing of the cover plate; the height of the gap is more than or equal to 1mm, so that the gap is convenient for operators to identify by naked eyes, and the upper limit of the height of the gap is related to the size of the product.
In some preferred embodiments of the forming device for the composite material flange cylinder, a step is arranged on one surface of the side splicing block corresponding to the prepreg ply, and two sections of structures with different inner diameters are formed vertically upwards, so that the side splicing block can be attached to the outer side surface of the cylinder, the lower surface of the flange and the outer side surface of the flange of the prepreg ply after die assembly; the inner diameter of the upper section of the side splicing block is consistent with the outer diameter of the flange of the product, the outer diameter of the lower section of the side splicing block is consistent with the outer diameter of the cylinder body of the product, and the step is matched with the lower surface of the flange of the product. The side splice blocks just form limit and rigid support on one side of the prepreg ply, which is not close to the expansion soft mold, so that the external dimension of the cured prepreg ply just can reach the theoretical value.
In some preferred embodiments of the device for forming the composite material flange cylinder, four side blocks are arranged, the four side blocks are detachably and circumferentially arranged on the outer side of the expansion soft die, and the outer side face of the cylinder, the lower surface of the flange and the outer side face of the flange can be bonded and coated with the prepreg ply after the die assembly, so that limit and rigid support are formed on the prepreg ply.
In some preferred embodiments of the device for forming a composite material flange cylinder of the present invention, the shape of the assembly formed by the bottom plate, the cover plate, the backing plate and the side blocks after being clamped is rectangular in a horizontal plane.
In some preferred embodiments of the forming device for the composite material flange cylinder, the outer frame is of an integral structure and comprises a supporting bottom surface and a circle of vertical wall plates arranged on the supporting bottom surface, wherein reinforcing ribs are arranged on the outer sides of the vertical wall plates and used for improving structural rigidity, and the outer frame is ensured not to deform affecting structural dimensional accuracy under mold closing pressure; the holding cavity is defined by the supporting bottom surface and the vertical wall plate, the holding cavity is of a square groove or cuboid groove structure, and the holding cavity is used for holding the forming die and the inclined wedge assembly.
In some preferred embodiments of the composite flanged cylinder forming apparatus of the invention, the cam assembly includes an inner cam and an outer cam; under the complete compound die state, the inclined plane of interior wedge with the inclined plane laminating of outer wedge, the inboard perpendicular of interior wedge with forming die's lateral surface laminating, the outside perpendicular of outer wedge with hold the chamber inside wall laminating, the large end of interior wedge down with hold the bottom surface laminating of chamber, the tip of outer wedge down with hold the bottom surface laminating of chamber, interior wedge with the top surface of outer wedge with the frame top surface is leveled.
In the die filling stage, the diameter of the barrel section of the prepreg ply before solidification is larger than the theoretical outer diameter of the barrel section, so that each single piece of the side splice block slightly protrudes outwards when just being installed, namely the side splice block is in an unclamped state, and the external dimension of the side splice block in a horizontal plane is slightly larger than that in a clamped state; at this time, the size of the rigid outer frame is unchanged, the inner wedge and the outer wedge are attached through the inclined planes of the inner wedge and the outer wedge, the outer wedge can be placed in the outer frame, but is not pressed to the bottom (the inner wedge is completely inserted), but is slightly upward, namely the bottom surface of the outer wedge is not contacted with the accommodating cavity, but a gap is left, the outer wedge needs to be pressed into the outer frame through the pressure head, so that the outer wedge moves downwards along the inclined planes to reach the theoretical position (the outer wedge is completely inserted into the outer frame), in the process, the inner wedge is pressed inwards through the inclined planes, so that the side splicing blocks correspondingly move inwards, and when the outer wedge is just completely pressed into the accommodating cavity of the outer frame, the side splicing blocks also just realize die assembly; under the compound die state, the bottom surfaces of the inner wedge and the outer wedge are attached to the bottom surface of the accommodating cavity, and the top surface is flush with the top surface of the accommodating cavity, namely the heights of the inner wedge and the outer wedge are consistent with the height of the accommodating cavity.
In some preferred embodiments of the forming device for the composite material flange cylinder body of the present invention, the number of the wedge assemblies is four, and the wedge assemblies are correspondingly arranged on four outer sides of the forming die in a surrounding manner, so as to respectively press the four sides of the forming die.
The four wedge assemblies are arranged, each wedge assembly comprises an inner wedge and an outer wedge, the inner wedge and the outer wedge are divided into four sections to be arranged around the forming die in a surrounding mode, each section corresponds to one side of the inner cavity of the outer frame, and the segmented wedge assemblies respectively pressurize one side of the forming die.
The second aspect of the invention provides a method for forming a composite material flange cylinder body based on the device for forming the composite material flange cylinder body, which comprises the following steps:
s1, paving prepreg layers on the outer side surface of a cylindrical section and the lower side surface of a flange section of an expansion soft mold;
s2, placing the expansion soft mold paved with the prepreg layer on the bottom plate, enabling the flange section to face upwards, inserting the positioning core mold into the through hole of the expansion soft mold, and inserting the positioning core mold into the blind hole of the bottom plate;
s3, placing the side splice blocks on a bottom plate, circumferentially surrounding the outer side of the expansion soft die, and coating the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange of the prepreg layer, wherein the side splice blocks do not compress the prepreg layer;
s4, covering the cover plate on the expansion soft die and the side splicing blocks, wherein the lower surface of a boss of the cover plate is attached to the top surface of the expansion soft die, and the cover plate does not press the expansion soft die and the side splicing blocks;
s5, placing the forming die of the unassembled backing plate combined by the S4 into a containing cavity of the outer frame, and sequentially inserting the inner wedge and the outer wedge into the containing cavity; at the moment, the inner vertical surface of the inner wedge is attached to the outer side surface of the side splicing block, the bottom surface of the inner wedge is attached to the bottom surface of the accommodating cavity, the outer wedge inclined surface is attached to the inclined surface of the inner wedge, the outer vertical surface of the outer wedge is attached to the inner side wall of the accommodating cavity, the outer wedge is not inserted into the bottom, and the top surface of the outer wedge protrudes out of the top surface of the outer frame;
s6, placing the forming die and the die frame of the unassembled backing plate combined by the S5 on a working platform of a press, heating the forming die to reduce the viscosity of resin of the prepreg paving layer, completely pressing the outer wedge into the accommodating cavity by using a pressure head of the press, thereby applying force to the side splicing blocks in the circumferential direction, assisting the side splicing blocks to clamp the prepreg paving layer, and completing the clamping of the side splicing blocks when the bottom surface of the outer wedge is attached to the bottom surface of the accommodating cavity and the inner wedge, the outer wedge and the top surface of the outer frame are flush;
s7, moving the pressure head upwards to separate from the die frame, and covering the base plate on the cover plate, wherein the top surface of the base plate is higher than the outer frame because the cover plate does not compress the expansion soft die and the side splicing blocks;
s8, moving the pressure head to be in contact with the base plate, and maintaining the pressure head to be not applied with force at the moment;
s9, heating the forming die to a temperature range of resin gel of the prepreg layering, and enabling the pressure head to apply force to completely press the base plate into the outer frame so as to apply force to the cover plate, and compressing the expansion soft die and the side splicing blocks until the top surface of the base plate is leveled with the top of the outer frame, so that die assembly of the cover plate is completed;
and S10, heating the molding die after the complete die assembly of the step S9 to a resin curing temperature range of the prepreg layering, and carrying out heat preservation to complete curing, wherein the cured prepreg layering forms a composite material flange cylinder product.
The prepreg is paved on the expansion soft mold; the positioning core mould for the expansion soft mould is positioned on the bottom plate, so that the expansion soft mould can be centered in the horizontal direction, the position deviation of the side splice blocks during installation is reduced, the side splice blocks are synchronous as much as possible during mould closing, and the phenomenon that the prepreg ply is severely and unevenly extruded to further cause fiber wrinkles is avoided;
the cylinder body and the flange of the prepreg layer are sequentially and respectively assembled:
in the die filling stage of the forming die, a base plate is not installed at first, and an outer wedge is pressed into an outer frame through a press to realize die closing of side splicing blocks, namely die closing of a barrel body part of a prepreg laying; in the process of assembling the side assembly blocks, the prepreg and the expansion soft mold corresponding to the barrel body part are extruded, the appearance is reduced, so that slight deformation is inevitably generated to one side of the flange, and the cover plate surface is lower than the top surface of the outer frame at the moment because the base plate is not installed, the pressure head cannot press the cover plate surface, and the flange part is in a free state, so that the deformation can be fully contained, and the process of assembling the side assembly blocks is smoother;
after the side splicing block is clamped, a backing plate is installed, and then the temperature is continuously increased, and the clamping of the flange part is completed at the temperature of the resin gel; as described above, the invention adopts a combined pressurizing mode at the flange: the corresponding expansion soft mould thinning at the flange and the processing mode of pressing the cover plate and the backing plate; the thickness of the flange of the expansion soft die is reduced, so that the adverse effect of the soft die at the flange on the barrel body is greatly reduced; because the soft mold at the flange is thinned, the situation that the expansion pressure is obviously insufficient can occur, the cover plate and the backing plate are adopted to press the expansion soft mold, and then the pressure is transmitted to the surface of the flange part, namely the prepreg ply flange part is mainly pressed by the pressing head, and the pressure is transmitted to the surface of the flange through the backing plate, the cover plate and the expansion soft mold in sequence; in the process, the expansion soft mold provides a pressure surface with continuous rigidity for the prepreg ply, namely, although sources of curing pressures of the prepreg ply cylinder body and the flange are different (the cylinder body is expanded by the soft mold and the flange is externally pressed by the press), all the pressures are finally applied through the surface of the expansion soft mold, so that the smoothness of the surface of the product can be ensured; if the flange and the cylinder body pressurizing medium are different, for example, the cylinder body is pressurized by adopting an expansion soft die, and the flange is directly pressurized by adopting a rigid die, the joint between the flange and the cylinder body pressurizing medium is easy to form misplacement due to overlarge rigidity difference of a pressurizing mode, so that fiber folds are caused, and the performance of a product is further influenced;
after the forming die is completely closed, the temperature is continuously increased to the curing temperature, and the final curing is completed through heat preservation.
In some preferred embodiments of the method for forming a composite flanged cylinder of the invention, in S6, the forming mold is heated to 50 to 100 ℃ to reduce the resin viscosity of the prepreg layup.
The side splicing block clamping temperature is selected within the range of 50-100 ℃, because the common composite material resin has lower viscosity at the temperature, the clamping process is relatively easy, and the resin does not start the curing reaction, so that the subsequent flange part clamping is not influenced; the specific temperature selected is related to the material properties and can be determined by various means such as measuring the viscosity-temperature curve, and will not be described here.
The third aspect of the invention provides a composite material flange cylinder product prepared by adopting the molding method of the composite material flange cylinder.
Compared with the prior art, the forming device and the forming method of the composite flange cylinder have the following advantages:
(1) The forming device of the composite material flange cylinder body has reasonable structural design, the rigid pressurization and the soft mold expansion pressurization are properly combined, the cylinder body is completely pressurized by virtue of the expansion soft mold, and the flange is pressurized by adopting a pressing machine, a rigid pressing plate and a soft mold assembly, so that the advantages of better adaptability of the expansion soft mold to a large-curvature and large-compression cylinder body and almost no bridging risk are reserved, and meanwhile, the thickness of the flange of the expansion soft mold is reduced, so that the adverse influence of the expansion of the soft mold at the flange on the cylinder body pressurization is greatly reduced; in addition, the expansion soft die provides a pressure surface with continuous rigidity, and all pressure is finally applied through the surface of the expansion soft die in spite of different sources of pressure of the cylinder body and the flange, so that the smoothness of the product surface can be ensured, and the phenomenon that pressurized mediums with different rigidities are misplaced at the interface of the product surface to cause fiber wrinkles is avoided; the die frame with the group of wedge is arranged, and the flange part is provided with the separated pressing plate and the backing plate, so that the cylinder body and the flange can be respectively matched with each other in sequence, and adverse influence of flange matching on cylinder body matching is further avoided; the adaptability is good, the reasonable pressurization of the whole structure can be realized, and the final product has good molding effect and accurate external dimension;
(2) The method for forming the composite material flange cylinder body is designed based on the forming device, the inclined wedge component is forced to press the side splicing blocks to complete the die assembly of the cylinder body, then the base plate is forced to press the cover plate and the expansion soft die to complete the die assembly of the flange part, the adverse effect of the die assembly process of the flange part on the die assembly of the cylinder body is avoided by adopting a step-by-step die assembly mode, the forming die can be completely matched, and the appearance size of a product is ensured to be accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
FIG. 1 is a schematic cross-sectional view of a composite flange cylinder molding device according to an embodiment of the present invention in a fully closed mold state;
FIG. 2 is a schematic view showing the three-dimensional structure of a molding die according to an embodiment of the invention;
FIG. 3 is a schematic three-dimensional structure of an expansion soft mold according to an embodiment of the present invention;
FIG. 4 is a schematic three-dimensional view of side panels according to an embodiment of the present invention;
FIG. 5 is a schematic three-dimensional structure of a cover plate according to an embodiment of the invention;
FIG. 6 is a schematic three-dimensional structure of a mold frame according to an embodiment of the present invention;
FIG. 7 is a schematic cross-sectional view of a device for forming a flange cylinder made of composite material according to an embodiment of the present invention in a mold-loading state;
fig. 8 is a schematic structural diagram of a composite flanged cylinder article prepared according to an embodiment of the invention.
Reference numerals illustrate:
1-a forming die; 2-a mold frame; 3-expanding the soft mold; 4-side segments; 5-a bottom plate; 6-positioning the core mold; 7-cover plate; 8-backing plate; 9-a through hole; 10-layering prepregs; 11-boss; 12-an outer frame; 13-supporting the bottom surface; 14-vertical wall panels; 15-reinforcing ribs; 16-inner wedge; 17-an outer wedge; 18-a working platform; 19-indenter.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
The invention will be described in detail below with reference to the drawings in connection with embodiments.
Example 1
As shown in fig. 1 to 6, a forming device of a composite flange cylinder comprises a forming die 1 and a die frame 2;
the forming die 1 comprises an expansion soft die 3, side blocks 4, a bottom plate 5, a positioning core die 6, a cover plate 7 and a base plate 8;
the expansion soft mold 3 comprises a cylindrical section and a flange section arranged at the top of the cylindrical section, wherein the outer side surface of the cylindrical section and the lower side surface of the flange section are used for paving prepreg layers; a through hole 9 is arranged at the central shaft of the expansion soft die 3;
the four side splice blocks 4 are detachably and circumferentially arranged on the outer side of the expansion soft mold 3 and can cover the outer side surface of the cylinder body, the lower surface of the flange and the outer side surface of the flange of the prepreg layer 10; the side splicing blocks 4 are provided with steps on one surface corresponding to the prepreg ply 10, and two sections of structures with different inner diameters are formed vertically upwards, so that the side splicing blocks can be attached to the outer side surface of the barrel body, the lower surface of the flange and the outer side surface of the flange of the prepreg ply 10 after die assembly; the inner diameter of the upper section of the side splicing block 4 is consistent with the outer diameter of the flange of the product, the lower section is consistent with the outer diameter of the cylinder body of the product, and the step is matched with the lower surface of the flange of the product; the top of the side splice 4 is higher than the expansion soft mould 3;
a blind hole is arranged in the center of the bottom plate 5; the bottom plate 5 is used for placing the expansion soft mold 3 and the side splice 4;
the positioning core mold 6 is detachably penetrated in the through hole 9 and inserted into the blind hole; a gap k is reserved between the top surface of the positioning core mold 6 and the top of the through hole 9, wherein k is more than or equal to 1mm;
the lower surface of the cover plate 7 is provided with a boss 11, the cover plate 7 is detachably covered on the expansion soft mold 3 and the side splicing blocks 4, and the lower surface of the boss 11 is attached to the top surface of the expansion soft mold 3;
the base plate 8 is detachably covered on the top surface of the cover plate 7;
the shape and the size of the combined body formed by the bottom plate 5, the cover plate 7, the base plate 8 and the side splice blocks 4 after being clamped are the same on the horizontal plane, and the vertical projection is rectangular with the same size;
wherein the mold frame 2 comprises an outer frame 12 and a wedge assembly;
the outer frame 12 is of a rigid structure and is provided with an accommodating cavity with an open upper end; the outer frame 12 comprises a supporting bottom surface 13 and a circle of vertical wall plates 14 arranged on the supporting bottom surface 13, and reinforcing ribs 15 are arranged on the outer sides of the vertical wall plates 14; the accommodating cavity is surrounded by the supporting bottom surface 13 and the vertical wall plate 14, the accommodating cavity is of a square groove or cuboid groove structure, and the forming die 1 can be placed in the accommodating cavity;
the four wedge assemblies are detachably inserted into the accommodating cavity and correspondingly arranged on the four outer side surfaces of the forming die 1 in a surrounding mode, pressure is applied to the four side surfaces of the forming die 1 respectively, and the side splice blocks 4 are assisted to be clamped, so that rigidity limitation is formed; the cam assembly comprises an inner cam 16 and an outer cam 17; in the complete die assembly state, the inclined plane of the inner wedge 16 is attached to the inclined plane of the outer wedge 17, the inner vertical plane of the inner wedge 16 is attached to the outer side surface of the forming die 1, the outer vertical plane of the outer wedge 17 is attached to the inner side wall of the accommodating cavity, the large end of the inner wedge 16 is attached to the bottom surface of the accommodating cavity downwards, the small end of the outer wedge 17 is attached to the bottom surface of the accommodating cavity downwards, and the top surfaces of the inner wedge 16 and the outer wedge 17 are leveled with the top surface of the outer frame 12.
Example 2
As shown in fig. 1 and 7, a method for forming a composite flange cylinder based on the forming device of embodiment 1 includes the following steps:
s1, paving prepreg layers 10 on the outer side surface of a cylindrical section and the lower side surface of a flange section of an expansion soft mold 3;
s2, placing the expansion soft mold 3 paved with the prepreg paving layer 10 on the bottom plate 5, enabling the flange section to face upwards, inserting the positioning core mold 6 into the through hole 9 of the expansion soft mold 3, and inserting the positioning core mold into the blind hole of the bottom plate 5;
s3, placing the side splice blocks 4 on the bottom plate 5, circumferentially surrounding the outer side of the expansion soft mold 3, and coating the outer side surface of the barrel body, the lower surface of the flange and the outer side surface of the flange of the prepreg ply 10, wherein the side splice blocks 4 do not press the prepreg ply 10 at this time, and the outer side surface slightly protrudes out of the outer side surface of the bottom plate 5;
s4, covering the cover plate 7 on the expansion soft mold 3 and the side splice blocks 4, wherein the lower surface of a boss 11 of the cover plate 7 is attached to the top surface of the expansion soft mold 3, and the cover plate 7 does not press the expansion soft mold 3 and the side splice blocks 4;
s5, placing the forming die of the unassembled backing plate 8 formed by the combination of S4 into a containing cavity of the outer frame 12, and sequentially inserting the inner wedge 16 and the outer wedge 17 into the containing cavity; at this time, the inner vertical surface of the inner wedge 16 is attached to the outer side surface of the side block 4, and the bottom surface of the inner wedge 16 is attached to the bottom surface of the accommodating cavity, i.e. the inner wedge 16 is completely inserted into the accommodating cavity; the inclined surface of the outer wedge 17 is attached to the inclined surface of the inner wedge 16, the outer vertical surface of the outer wedge 17 is attached to the inner side wall of the accommodating cavity, and as the side splicing blocks 4 are not pressed against the prepreg layer 10, the outer side surface slightly protrudes out of the outer side surface of the bottom plate 5, so that the outer wedge 17 cannot be completely inserted into the bottom, a gap h is reserved, and the top surface of the outer wedge 17 protrudes out of the top surface of the outer frame 12;
s6, placing the forming die 1 and the die frame 2 of the unassembled backing plate 8 formed by the combination of S5 on a working platform 18 of a press, heating the forming die 1 to 50-100 ℃ to reduce the resin viscosity of the prepreg ply 10, and then completely pressing the outer wedge 17 into the accommodating cavity by using a pressing head 19 of the press so as to apply force to the side splice 4 in the circumferential direction, and closing the auxiliary side splice 4 to tightly press the prepreg ply 10, wherein when the bottom surface of the outer wedge 17 is attached to the bottom surface of the accommodating cavity, and the top surfaces of the inner wedge 16, the outer wedge 17 and the outer frame 12 are flush, closing the side splice 4 (namely closing the barrel part);
s7, moving the pressure head 19 upwards to separate from the die frame 2, and covering the base plate 8 on the cover plate 7, wherein the top surface of the base plate 8 is slightly higher than the outer frame 12 because the cover plate 7 does not press the expansion soft die 3 and the side splice 4;
s8, moving the pressure head 19 to be in contact with the backing plate 8, and maintaining the pressure head 19 to be not applied with force at the moment;
s9, heating the forming die 1 to a temperature range of resin gel of the prepreg ply 10, and applying force by the pressure head 19 to completely press the backing plate 8 into the outer frame 12 so as to apply force on the cover plate 7, and pressing the expansion soft die 3 and the side splice 4 until the top surface of the backing plate 8 is leveled with the top of the outer frame 12, so that die assembly of the cover plate 7 (namely die assembly of a flange part) is completed;
and S10, heating the molding die 1 after the complete die assembly of S9 to a resin curing temperature range of the prepreg ply 10, and performing heat preservation to complete curing, wherein the cured prepreg ply 10 forms a composite material flange cylinder product (shown in fig. 8).
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a forming device of combined material flange barrel which characterized in that: comprises a forming die and a die frame;
the forming die comprises an expansion soft die, side blocks, a bottom plate, a cover plate and a base plate;
the expansion soft die comprises a cylindrical section and a flange section arranged at the top of the cylindrical section, wherein the outer side surface of the cylindrical section and the lower side surface of the flange section are used for paving prepreg layers; the side splice blocks are arranged in a plurality, are detachably and circumferentially arranged on the outer side of the expansion soft die in a surrounding mode, and can cover the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange of the prepreg layer, and the top of each side splice block is higher than the expansion soft die; the bottom plate is used for placing the expansion soft mold and the side blocks; the lower surface of the cover plate is provided with a boss, the cover plate is detachably covered on the expansion soft die and the side splicing blocks, the lower surface of the boss is attached to the top surface of the expansion soft die, and the base plate is covered on the top surface of the cover plate; the shape and the size of the bottom plate, the cover plate and the backing plate on the horizontal plane are the same as those of the combined body formed by the side assembly blocks after the side assembly blocks are assembled;
the die frame comprises an outer frame and an inclined wedge assembly;
the outer frame is of a rigid structure and is provided with an accommodating cavity with an open upper end; the forming die is arranged in the accommodating cavity; the wedge assemblies are detachably inserted into the accommodating cavity, are arranged on the outer side surface of the forming die in a surrounding mode, apply force to the forming die in the circumferential direction and assist the side splicing blocks to be clamped;
after the forming device is integrally assembled, the top of the forming die and the top of the die frame are leveled.
2. The composite flanged cylinder forming device of claim 1, wherein: the forming die further comprises a positioning core die; a through hole is formed in the central shaft of the expansion soft die, and a blind hole is formed in the center of the bottom plate; the positioning core mold is detachably penetrated in the through hole and inserted into the blind hole;
preferably, a gap is left between the top surface of the positioning core mold and the top of the through hole.
3. The composite flanged cylinder forming device of claim 2, wherein: the side splice blocks are provided with steps on one surface corresponding to the prepreg layer, and two sections of structures with different inner diameters are formed vertically upwards, so that the side splice blocks can be attached to the outer side surface of the barrel body, the lower surface of the flange and the outer side surface of the flange of the prepreg layer after die assembly; the inner diameter of the upper section of the side splicing block is consistent with the outer diameter of a flange of the product, the outer diameter of the lower section of the side splicing block is consistent with the outer diameter of a barrel body of the product, and the step is matched with the lower surface of the flange of the product;
preferably, the four side blocks are detachably arranged on the outer side of the expansion soft die in a surrounding mode, and can be attached to the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange for coating the prepreg layer after die assembly, so that limit and rigid support are formed for the prepreg layer.
4. The composite flanged cylinder forming device of claim 2, wherein: the shape of the combined body formed by the bottom plate, the cover plate, the base plate and the side splice blocks after being clamped on the horizontal plane is rectangular.
5. The composite flanged cylinder forming apparatus of claim 4, wherein: the outer frame comprises a supporting bottom surface and a circle of vertical wall plates arranged on the supporting bottom surface, and reinforcing ribs are arranged on the outer sides of the vertical wall plates; the holding cavity is defined by the supporting bottom surface and the vertical wall plate, and the holding cavity is of a square groove or cuboid groove structure.
6. The composite flanged cylinder forming apparatus of claim 5, wherein: the wedge assembly comprises an inner wedge and an outer wedge; under the complete compound die state, the inclined plane of interior wedge with the inclined plane laminating of outer wedge, the inboard perpendicular of interior wedge with forming die's lateral surface laminating, the outside perpendicular of outer wedge with hold the chamber inside wall laminating, the large end of interior wedge down with hold the bottom surface laminating of chamber, the tip of outer wedge down with hold the bottom surface laminating of chamber, interior wedge with the top surface of outer wedge with the frame top surface is leveled.
7. The composite flanged cylinder forming apparatus of claim 6, wherein: the four wedge assemblies are correspondingly arranged on the four outer side faces of the forming die in a surrounding mode, and pressure is applied to the four side faces of the forming die respectively.
8. A method of forming a composite flanged cylinder using the forming apparatus of claim 6, comprising the steps of:
s1, paving prepreg layers on the outer side surface of a cylindrical section and the lower side surface of a flange section of an expansion soft mold;
s2, placing the expansion soft mold paved with the prepreg layer on the bottom plate, enabling the flange section to face upwards, inserting the positioning core mold into the through hole of the expansion soft mold, and inserting the positioning core mold into the blind hole of the bottom plate;
s3, placing the side splice blocks on a bottom plate, circumferentially surrounding the outer side of the expansion soft die, and coating the outer side face of the cylinder body, the lower surface of the flange and the outer side face of the flange of the prepreg layer, wherein the side splice blocks do not compress the prepreg layer;
s4, covering the cover plate on the expansion soft die and the side splicing blocks, wherein the lower surface of a boss of the cover plate is attached to the top surface of the expansion soft die, and the cover plate does not press the expansion soft die and the side splicing blocks;
s5, placing the forming die of the unassembled backing plate combined by the S4 into a containing cavity of the outer frame, and sequentially inserting the inner wedge and the outer wedge into the containing cavity; at the moment, the inner vertical surface of the inner wedge is attached to the outer side surface of the side splicing block, the bottom surface of the inner wedge is attached to the bottom surface of the accommodating cavity, the outer wedge inclined surface is attached to the inclined surface of the inner wedge, the outer vertical surface of the outer wedge is attached to the inner side wall of the accommodating cavity, the outer wedge is not inserted into the bottom, and the top surface of the outer wedge protrudes out of the top surface of the outer frame;
s6, placing the forming die and the die frame of the unassembled backing plate combined by the S5 on a working platform of a press, heating the forming die to reduce the viscosity of resin of the prepreg paving layer, completely pressing the outer wedge into the accommodating cavity by using a pressure head of the press, thereby applying force to the side splicing blocks in the circumferential direction, assisting the side splicing blocks to clamp the prepreg paving layer, and completing the clamping of the side splicing blocks when the bottom surface of the outer wedge is attached to the bottom surface of the accommodating cavity and the inner wedge, the outer wedge and the top surface of the outer frame are flush;
s7, moving the pressure head upwards to separate from the die frame, and covering the base plate on the cover plate, wherein the top surface of the base plate is higher than the outer frame because the cover plate does not compress the expansion soft die and the side splicing blocks;
s8, moving the pressure head to be in contact with the base plate, and maintaining the pressure head to be not applied with force at the moment;
s9, heating the forming die to a temperature range of resin gel of the prepreg layering, and enabling the pressure head to apply force to completely press the base plate into the outer frame so as to apply force to the cover plate, and compressing the expansion soft die and the side splicing blocks until the top surface of the base plate is leveled with the top of the outer frame, so that die assembly of the cover plate is completed;
and S10, heating the molding die after the complete die assembly of the step S9 to a resin curing temperature range of the prepreg layering, and carrying out heat preservation to complete curing, wherein the cured prepreg layering forms a composite material flange cylinder product.
9. The method for forming a composite flanged cylinder of claim 8, wherein: in the step S6, the molding die is heated to 50-100 ℃ to reduce the resin viscosity of the prepreg layup.
10. The utility model provides a combined material flange barrel which characterized in that: the flange cylinder is prepared by adopting the molding method of the composite material flange cylinder body as claimed in claim 8 or 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311602869.9A CN117484911A (en) | 2023-11-28 | 2023-11-28 | Forming device and forming method for composite flange cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311602869.9A CN117484911A (en) | 2023-11-28 | 2023-11-28 | Forming device and forming method for composite flange cylinder |
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| CN117484911A true CN117484911A (en) | 2024-02-02 |
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| CN202311602869.9A Pending CN117484911A (en) | 2023-11-28 | 2023-11-28 | Forming device and forming method for composite flange cylinder |
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