CN210758686U - Composite material mould frock for helicopter tail boom - Google Patents
Composite material mould frock for helicopter tail boom Download PDFInfo
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- CN210758686U CN210758686U CN201921299369.1U CN201921299369U CN210758686U CN 210758686 U CN210758686 U CN 210758686U CN 201921299369 U CN201921299369 U CN 201921299369U CN 210758686 U CN210758686 U CN 210758686U
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Abstract
The utility model discloses a helicopter is combined material mould frock for tail boom, include: the composite material main body mould comprises an upper forming mould and a lower forming mould of the main body mould; the back support structure comprises an upper forming die back support structure and a lower forming die back support structure, and the upper forming die back support structure and the lower forming die back support structure are respectively connected with the outer surfaces of the upper forming die and the lower forming die of the main body die and are used for supporting the upper forming die and the lower forming die of the main body die; the adjustable tension support device of the upper forming model surface and the lower forming model surface which reset and the adjustable tension support device of the lower forming model surface which reset are respectively connected with the upper forming model of the main body model and the lower forming model of the main body model and are used for resetting the upper forming model surface and the lower forming model surface of the upper forming model of the main body model and the lower forming model of the main body model. Through the utility model discloses fashioned combined material tail-beam is whole co-curing shaping, and its profile precision is high, and the internal stress of production is little, and mould frock light in weight, and hoist and mount are convenient, and factor of safety is high.
Description
Technical Field
The utility model relates to a manufacturing technical field of combined material frock specifically is a combined material mould frock for helicopter tail boom.
Background
The composite material plays an increasingly important role in the field of aviation by virtue of excellent performance, and the dosage ratio of the composite material is increased along with the continuous progress of the design and manufacturing technology of the composite material, no matter civil aircraft or military aircraft.
Most of composite material forming tools are made of steel or aluminum materials, but the difference between the thermal expansion coefficient of steel and aluminum and the thermal expansion coefficient of composite materials is large, the composite material part formed by the metal tool is poor in size stability, the molded surface is easy to be out of tolerance, and the size requirements of products such as a fuselage section, a helicopter tail beam, a radar cover and the like are difficult to meet. The metal tooling has high heat conductivity coefficient, large specific heat and uneven temperature distribution in the heating process, so that the energy consumption cost is increased, and the formed composite material workpiece can generate stress concentration and is easy to scrap.
Along with the technical innovation of the composite material industry, the composite material die is produced at the same time, is matched with the thermal expansion coefficient of a composite material workpiece, has lower specific heat capacity, uniform temperature distribution and lighter weight, greatly improves the profile precision and the dimensional stability of the composite material workpiece, reduces the production energy consumption, improves the qualification rate of the product, is more convenient and safer to transport and unload, and is particularly indispensable for manufacturing the products such as a fuselage section, a tail beam of a helicopter, a radome and the like.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defect and the not enough of current combined material shaping frock technique, provide a combined material mould frock for helicopter tail boom.
In order to realize the utility model discloses an aim, the utility model discloses the technical scheme who adopts as follows:
the utility model provides a helicopter is combined material mould frock for tail boom, includes:
the composite material main body mould comprises a main body mould upper forming mould and a main body mould lower forming mould;
the back support structure comprises an upper forming die back support structure and a lower forming die back support structure, and the upper forming die back support structure is connected with the outer surface of the main body die upper forming die and is used for supporting the main body die upper forming die; the lower forming die back supporting structure is connected with the outer surface of the main body die lower forming die and is used for supporting the main body die lower forming die;
the adjustable tension support device for the reset upper forming die molded surface is connected with the upper forming die of the main body die and is used for resetting the upper forming die molded surface of the upper forming die of the main body die; the adjustable tension support device for the reset lower forming model surface is connected with the main body die lower forming die and used for resetting the lower forming die surface of the main body die lower forming die.
In a preferred embodiment of the present invention, a plurality of hoisting metal insert blocks are pre-embedded in the main body mold by co-curing, so as to hoist the main body mold; the surface of the metal insert is anodized by phosphoric acid.
In a preferred embodiment of the present invention, a plurality of through-hole metal bush embedded parts are provided on the main body upper forming die, and a plurality of positioning metal bush embedded parts and internal thread metal embedded parts are provided on the main body lower forming die; each through hole metal bush embedded part is fixedly connected with the corresponding metal bush embedded part for positioning through a positioning pin so as to position the relative position of the upper forming die and the lower forming die of the main body die; each through hole metal bushing embedded part is connected with the corresponding internal thread metal embedded part through a bolt so as to fasten the main body mould upper forming mould and the main body mould lower forming mould, and ensure that the main body mould upper forming mould is attached to the main body mould lower forming mould to form a cylindrical structure. The formed composite material tail beam can realize an integrated co-curing structure, the structural strength of the tail beam is enhanced, and partial assembling and gluing work is reduced.
In a preferred embodiment of the present invention, the upper forming mold back support structure includes an upper back support plate and an upper back support plate skeleton, the upper back support plate is glued to the outer surface of the forming mold on the main body mold, and the upper back support plate is fixed to the upper back support plate skeleton; the lower forming die back supporting structure comprises a lower back supporting plate and a lower back supporting plate framework, the lower back supporting plate is glued on the outer surface of the main body die lower forming die, and the lower back supporting plate is fixed on the lower back supporting plate framework.
In a preferred embodiment of the utility model, leave 0.1mm-0.20 mm's clearance between the surface of upper back backup pad with main part mould upper forming die, also leave 0.1mm-0.20 mm's clearance between the surface of lower back backup pad with main part mould lower forming die, reserve the high temperature expansion clearance for the frock, prevent that the interaction causes stress cracking under the frock thermal expansion, less clearance also prevents that combined material mould frock opening from warping, plays the effect of clamp.
In a preferred embodiment of the present invention, the thickness of the upper back supporting plate is the same as the thickness of the upper forming die of the main body die, and the forming method is the same, and the thickness of the lower back supporting plate is the same as the thickness of the lower forming die of the main body die, and the forming method is the same
In a preferred embodiment of the present invention, the upper back support plate is riveted to the upper back support plate framework through an upper metal corner piece or an upper carbon fiber corner piece, and a gap between the upper back support plate and the upper metal corner piece or the upper carbon fiber corner piece is bonded by an adhesive; the lower back supporting plate is riveted on the lower back supporting plate framework through a lower metal angle sheet or a lower carbon fiber angle sheet, and the gap between the lower back supporting plate and the lower metal angle sheet or the lower carbon fiber angle sheet is bonded by an adhesive.
In a preferred embodiment of the present invention, the upper back support plate skeleton, the lower back support plate, and the lower back support plate skeleton are made of carbon fiber prepreg.
In a preferred embodiment of the present invention, the adjustable tension device for the reset upper forming die profile comprises a plurality of upper tension rods, an upper metal top plate and an upper fixing frame; the upper metal top plate is pre-embedded in the forming die on the main body die, a plurality of upper pull support rods are welded on the upper metal top plate at intervals, and each upper pull support rod is provided with an external thread; an upper stay bar through hole is formed in the upper fixing frame corresponding to each upper stay bar, and an upper stay bar adjusting nut is screwed after the upper stay bar penetrates through the corresponding upper stay bar through hole; the upper fixing frame is fixed on the upper back supporting plate framework through a fastener; the lower reset forming die profile adjustable bracing device consists of a plurality of lower bracing rods, a lower metal top plate and a lower fixed frame; the lower metal top plate is pre-embedded in the lower forming die of the main body die, a plurality of lower pull support rods are welded on the lower metal top plate at intervals, and each lower pull support rod is provided with an external thread; a lower pull brace passing hole is formed in the position, corresponding to each lower pull brace, of the lower fixing frame, and a lower pull brace adjusting nut is screwed after the lower pull brace passes through the corresponding lower pull brace passing hole; the lower fixing frame is fixed on the lower back supporting plate framework through a fastener; and the upper and lower support adjusting nuts are rotated to drive the upper main body mould forming die and the lower main body mould forming die to slightly move through the upper and lower support rods, the upper and lower metal top plates and the upper and lower fixing frames, so that the molded surfaces of the upper main body mould forming die and the lower main body mould forming die are finely adjusted.
In a preferred embodiment of the utility model, the combined material mould frock for helicopter tail boom can be used to autoclave technology.
In a preferred embodiment of the present invention, the main body upper forming die and the main body lower forming die are respectively formed by duplicating an upper transition female die and a lower transition female die.
In a preferred embodiment of the present invention, the upper transition master die and the lower transition master die are made of epoxy instead of wood, the mold surface between the upper transition master die and the lower transition master die is completely attached to the mold surface between the upper main die and the lower main die, the mold surface precision between the upper main die and the lower main die can be controlled within ± 0.15mm, and the surface roughness of the upper transition master die and the lower transition master die is between R0.1 and R0.4 after surface sealing and polishing.
In a preferred embodiment of the present invention, the main body upper forming die and the main body lower forming die are made by curing carbon fiber die prepreg in an autoclave, the curing temperature of the carbon fiber die prepreg is controlled between 45 ℃ and 70 ℃, and the main body upper forming die and the main body lower forming die can be recycled at high temperature after being post-cured at 200 ℃.
Due to the adoption of the technical scheme, the composite material tail beam formed by the composite material die tool for the helicopter tail beam is integrally co-cured and formed, the profile precision is high, the generated internal stress is small, the die tool is light in weight, the hoisting is convenient, and the safety coefficient is high. Even if the composite material die tool slightly deforms in the repeated use process, the composite material die tool can be adjusted through the adjustable bracing device for the molded surfaces of the upper forming die and the lower forming die.
Drawings
Fig. 1 is the utility model discloses a structural schematic diagram of combined material mould frock for helicopter tail boom.
Fig. 2 is the utility model discloses an adjustable bracing device of moulded surface and the adjustable bracing device of shaping model face under restoring to the throne in the combined material mould frock for helicopter tail boom's the structural schematic diagram of the adjustable bracing device of moulded surface on restoring to the throne.
Detailed Description
The utility model discloses a helicopter is combined material mould frock for tail boom mainly adopts carbon fiber mould preimpregnation material to spread and makes and form, can be used to autoclave technology. The composite material main body mould comprises a main body mould upper forming mould 110 and a main body mould lower forming mould 120, wherein the main body mould upper forming mould 110 and the main body mould lower forming mould 120 are copied by an upper transition female mould and a lower transition female mould which are made of TB750, TB650 or other equivalent epoxy wood substitutes, firstly, the epoxy wood substitutes are bonded by epoxy adhesive under vacuum pressure to prepare wood substitute-shaped blanks, the wood substitute-shaped blanks are processed into the upper transition female mould and the lower transition female mould by a five-axis machine tool according to three-dimensional digifax of the main body mould upper forming mould 110 and the main body mould lower forming mould 120, and the processed upper transition female mould and the processed lower transition female mould are subjected to surface cleaning, sealing, polishing and demoulding agent coating treatment. The surface roughness is between R0.1 and R0.4.
The model surface between the upper transition master model and the lower transition master model is completely attached to the model surface between the main body model upper forming die 110 and the main body model lower forming die 120, and the model surface precision between the main body model upper forming die 110 and the main body model lower forming die 120 can be controlled within +/-0.15 mm.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Referring to fig. 1 and 2, the composite material mold tool for the helicopter tail boom comprises: the composite material main body mold, the upper back support plate 200, the lower back support plate 200a, the upper fixed back support plate framework 300, the lower fixed back support plate framework 300a, the upper reset forming mold surface adjustable bracing device 400 and the upper reset forming mold surface adjustable bracing device 400 a.
The composite material main body mould comprises a main body mould upper forming mould 110 and a main body mould lower forming mould 120, wherein the main body mould upper forming mould 110 and the main body mould lower forming mould 120 are made by carbon fiber mould prepreg autoclave curing, the carbon fiber mould prepreg curing temperature is controlled to be 45-70 ℃, and the main body mould upper forming mould 110 and the main body mould lower forming mould 120 can be recycled at high temperature after being cured at 200 ℃.
Four hoisting metal embedded blocks 111 are arranged on the main body upper forming die 110 and are used for hoisting the main body upper forming die 110; the surface of the metal insert 111 is anodized with phosphoric acid. The metal insert 111 is directly pre-embedded on the main body mould 110 and co-cured to form the metal insert.
A plurality of through-hole metal bush embedded parts 112 are further provided on the main body upper die forming die 110, a plurality of positioning metal bush embedded parts 121a and internal thread metal embedded parts 121b are provided on the main body lower die forming die 120, and each through-hole metal bush embedded part 112 and the corresponding positioning metal bush embedded part 121a are fixed by a positioning pin (not shown in the figure) so as to position the relative positions of the main body upper die forming die 110 and the main body lower die forming die 120. Each through hole metal bushing embedded part 112 is connected with the corresponding internal thread metal embedded part 121b through a bolt, so that the main body upper forming die 110 and the main body lower forming die 120 can be fastened, and the main body upper forming die 110 and the main body lower forming die 120 are attached to form a cylindrical structure. The formed composite material tail beam can realize an integrated co-curing structure, the structural strength of the tail beam is enhanced, and partial assembling and gluing work is reduced.
The upper back support plate 200 and the lower back support plate 200a are bonded to the outer surfaces of the main body mold upper forming die 110 and the main body mold lower forming die 120, respectively, by a silicon adhesive, and the thickness of the upper back support plate 200 is the same as that of the main body mold upper forming die 110, and the forming manner is the same. A gap of 0.1mm-0.20mm is left between the upper back support plate 200 and the outer surface of the forming die 110 on the main body die. Also, the thickness of the lower back support plate 200a is the same as the thickness of the main body mold lower forming die 120 in a uniform manner. A gap of 0.1mm to 0.20mm is also left between the lower back support plate 200a and the outer surface of the main body mold lower forming die 120. A high-temperature expansion gap is reserved for the tool, stress cracking caused by interaction under thermal expansion of the tool is prevented, and the small gap also prevents the opening of the composite material die tool from deforming to play a role of a clamp.
Go up back backup pad 200 and rivet through last metal angle piece or last carbon fiber angle piece with last fixed back backup pad skeleton 300, clearance department bonds with silicon adhesive, and lower back backup pad 200a rivets with lower fixed back backup pad skeleton 300a through metal angle piece or lower carbon fiber angle piece down, and clearance department bonds with silicon adhesive. The upper back support plate 200, the lower back support plate 200a, the upper fixed back support plate skeleton 300, and the lower fixed back support plate skeleton 300a are all made of carbon fiber mold prepreg.
The upper reset forming die surface adjustable bracing device 400 is composed of a plurality of upper bracing rods 410, an upper metal top plate 420 and an upper fixing frame 430; the upper metal top plate 420 is co-cured and pre-embedded in the upper forming die 110 of the main body die, a plurality of upper pull support rods 410 are welded on the upper metal top plate 420 at intervals, and each upper pull support rod 410 is provided with an external thread; an upper stay bar through hole (not shown) is formed in the upper fixing frame 430 corresponding to each upper stay bar 410, and an upper stay bar adjusting nut 440 is screwed after the upper stay bar 410 passes through the corresponding upper stay bar through hole; the upper fixing frame 430 is fixed to the upper back support plate frame 300 by a fastener.
The lower reset forming die surface adjustable bracing device 400a is composed of a plurality of lower bracing rods 410a, a lower metal top plate 420a and a lower fixed frame 430 a; the lower metal top plate 420a is solidified and pre-embedded in the main body mold lower forming die 120, a plurality of lower pull-down support rods 410a are welded on the lower metal top plate 420a at intervals, and each lower pull-down support rod 410a is provided with an external thread; a lower stay passing hole (not shown) is formed in the lower fixing frame 430a corresponding to each lower stay 410a, and a lower stay adjusting nut 440a is screwed after the lower stay 410a passes through the corresponding lower stay passing hole; the lower fixing frame 430a is fixed to the lower back support plate frame 300a by a fastener.
The upper and lower stay adjusting nuts 440, 440a are rotated to drive the upper main body mold forming die 110 and the lower main body mold forming die 120 to slightly move through the upper and lower stay rods 410, 410a, the upper and lower metal top plates 420, 420a, the upper and lower fixing frames 430, 430a, so as to finely adjust the profiles of the upper main body mold forming die 110 and the lower main body mold forming die 120.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, and it should be understood by those skilled in the art that the present invention is not limited by the above embodiments, but only by the description of the above embodiments and the description, without departing from the spirit and scope of the present invention, the present invention can also have various changes and modifications, and these changes and modifications all fall within the scope of the claimed invention. The scope of the invention is defined by the following claims and their equivalents.
Claims (13)
1. The utility model provides a helicopter is combined material mould frock for tail boom which characterized in that includes:
the composite material main body mould comprises a main body mould upper forming mould and a main body mould lower forming mould;
the back support structure comprises an upper forming die back support structure and a lower forming die back support structure, and the upper forming die back support structure is connected with the outer surface of the main body die upper forming die and is used for supporting the main body die upper forming die; the lower forming die back supporting structure is connected with the outer surface of the main body die lower forming die and is used for supporting the main body die lower forming die;
the adjustable tension support device for the reset upper forming die molded surface is connected with the upper forming die of the main body die and is used for resetting the upper forming die molded surface of the upper forming die of the main body die; the adjustable tension support device for the reset lower forming model surface is connected with the main body die lower forming die and used for resetting the lower forming die surface of the main body die lower forming die.
2. The composite material mold tooling for the tail boom of the helicopter of claim 1, wherein a plurality of hoisting metal inserts are pre-embedded in the main body mold by co-curing for hoisting the main body mold; the surface of the metal insert is anodized by phosphoric acid.
3. The composite material mold tooling for the helicopter tail boom of claim 1, characterized in that a plurality of through hole metal bushing embedded pieces are arranged on the main body mold upper forming mold, and a plurality of positioning metal bushing embedded pieces and internal thread metal embedded pieces are arranged on the main body mold lower forming mold; each through hole metal bush embedded part is fixedly connected with the corresponding metal bush embedded part for positioning through a positioning pin so as to position the relative position of the upper forming die and the lower forming die of the main body die; each through hole metal bushing embedded part is connected with the corresponding internal thread metal embedded part through a bolt so as to fasten the main body mould upper forming mould and the main body mould lower forming mould, and ensure that the main body mould upper forming mould is attached to the main body mould lower forming mould to form a cylindrical structure.
4. The composite material mold tooling for the helicopter tail boom of claim 1, characterized in that said upper forming mold back support structure comprises an upper back support plate and an upper back support plate skeleton, said upper back support plate is glued on the outer surface of said main body upper forming mold, said upper back support plate is fixed on said upper back support plate skeleton; the lower forming die back supporting structure comprises a lower back supporting plate and a lower back supporting plate framework, the lower back supporting plate is glued on the outer surface of the main body die lower forming die, and the lower back supporting plate is fixed on the lower back supporting plate framework.
5. The composite material mold tooling for the helicopter tail boom of claim 4, characterized in that a gap of 0.1mm to 0.20mm is left between the upper back support plate and the outer surface of the upper forming die of the main body mold, and a gap of 0.1mm to 0.20mm is also left between the lower back support plate and the outer surface of the lower forming die of the main body mold.
6. The composite material mold tooling for the helicopter tail boom of claim 4, wherein the thickness of said upper back support plate is consistent with the thickness and molding manner of the upper molding die of the main body mold, and the thickness of said lower back support plate is consistent with the thickness and molding manner of the lower molding die of the main body mold.
7. The composite material mold tooling for the helicopter tail boom of claim 4, characterized in that said upper back support plate is riveted to said upper back support plate skeleton by means of an upper metal angle piece or an upper carbon fiber angle piece, and the gap between said upper back support plate and said upper metal angle piece or said upper carbon fiber angle piece is bonded by means of an adhesive; the lower back supporting plate is riveted on the lower back supporting plate framework through a lower metal angle sheet or a lower carbon fiber angle sheet, and the gap between the lower back supporting plate and the lower metal angle sheet or the lower carbon fiber angle sheet is bonded by an adhesive.
8. The composite material mold tooling for the helicopter tail boom of claim 4, wherein said upper back support plate, upper back support plate skeleton, lower back support plate skeleton are made of carbon fiber mold prepreg.
9. The composite material mold tooling for the helicopter tail boom of claim 4, characterized in that said reset upper forming mold profile adjustable bracing device is composed of a plurality of upper bracing rods, an upper metal top plate and an upper fixed frame; the upper metal top plate is pre-embedded in the forming die on the main body die, a plurality of upper pull support rods are welded on the upper metal top plate at intervals, and each upper pull support rod is provided with an external thread; an upper stay bar through hole is formed in the upper fixing frame corresponding to each upper stay bar, and an upper stay bar adjusting nut is screwed after the upper stay bar penetrates through the corresponding upper stay bar through hole; the upper fixing frame is fixed on the upper back supporting plate framework through a fastener; the lower reset forming die profile adjustable bracing device consists of a plurality of lower bracing rods, a lower metal top plate and a lower fixed frame; the lower metal top plate is pre-embedded in the lower forming die of the main body die, a plurality of lower pull support rods are welded on the lower metal top plate at intervals, and each lower pull support rod is provided with an external thread; a lower pull brace passing hole is formed in the position, corresponding to each lower pull brace, of the lower fixing frame, and a lower pull brace adjusting nut is screwed after the lower pull brace passes through the corresponding lower pull brace passing hole; the lower fixing frame is fixed on the lower back supporting plate framework through a fastener; and the upper and lower support adjusting nuts are rotated to drive the upper main body mould forming die and the lower main body mould forming die to slightly move through the upper and lower support rods, the upper and lower metal top plates and the upper and lower fixing frames, so that the molded surfaces of the upper main body mould forming die and the lower main body mould forming die are finely adjusted.
10. The composite material mold tooling for a helicopter tail boom of claim 1, wherein said composite material mold tooling for a helicopter tail boom is usable in autoclave processes.
11. The composite material mold tooling for a helicopter tail boom of claim 1, wherein said main body mold upper forming die and said main body mold lower forming die are respectively duplicated from an upper transition female die and a lower transition female die.
12. The composite material mold tooling for a helicopter tail boom of claim 11, wherein said upper transition master mold and said lower transition master mold are made of epoxy wood substitute, the mold surface between said upper transition master mold and said lower transition master mold is completely attached to the mold surface between said upper main mold and said lower main mold, the mold surface precision between said upper main mold and said lower main mold can be controlled within ± 0.15mm, and the surface roughness of said upper transition master mold and said lower transition master mold after surface sealing and polishing treatment is between R0.1 and R0.4.
13. The composite material mold tooling for the helicopter tail boom of claim 1, wherein the main body upper molding die and the main body lower molding die are both made by carbon fiber mold prepreg autoclave curing, the curing temperature of the carbon fiber mold prepreg is controlled between 45 ℃ and 70 ℃, and the main body upper molding die and the main body lower molding die can be recycled at high temperature after being cured at 200 ℃.
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| CN201921299369.1U CN210758686U (en) | 2019-08-12 | 2019-08-12 | Composite material mould frock for helicopter tail boom |
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| CN201921299369.1U CN210758686U (en) | 2019-08-12 | 2019-08-12 | Composite material mould frock for helicopter tail boom |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509462A (en) * | 2019-08-12 | 2019-11-29 | 宁波沥高复合材料有限公司 | A kind of tail boom composite material mould tooling |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110509462A (en) * | 2019-08-12 | 2019-11-29 | 宁波沥高复合材料有限公司 | A kind of tail boom composite material mould tooling |
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