CN116968154A - Forming die and forming method for composite material revolving body component - Google Patents
Forming die and forming method for composite material revolving body component Download PDFInfo
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- CN116968154A CN116968154A CN202311028047.4A CN202311028047A CN116968154A CN 116968154 A CN116968154 A CN 116968154A CN 202311028047 A CN202311028047 A CN 202311028047A CN 116968154 A CN116968154 A CN 116968154A
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- 239000002131 composite material Substances 0.000 title claims abstract description 46
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003825 pressing Methods 0.000 claims abstract description 91
- 238000007493 shaping process Methods 0.000 claims abstract description 45
- 238000000465 moulding Methods 0.000 claims abstract description 21
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 13
- 238000003763 carbonization Methods 0.000 claims description 12
- 239000004744 fabric Substances 0.000 claims description 8
- 238000005475 siliconizing Methods 0.000 claims description 7
- 239000000919 ceramic Substances 0.000 claims description 6
- 230000008595 infiltration Effects 0.000 claims description 5
- 238000001764 infiltration Methods 0.000 claims description 5
- 238000004321 preservation Methods 0.000 claims description 5
- 238000007711 solidification Methods 0.000 claims description 5
- 230000008023 solidification Effects 0.000 claims description 5
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- 230000004927 fusion Effects 0.000 claims description 4
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 3
- 239000004917 carbon fiber Substances 0.000 claims description 3
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 3
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 3
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 3
- 239000011153 ceramic matrix composite Substances 0.000 description 12
- 238000001723 curing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 8
- 238000004513 sizing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000010923 batch production Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
- B28B13/04—Discharging the shaped articles
- B28B13/06—Removing the shaped articles from moulds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/006—Pressing by atmospheric pressure, as a result of vacuum generation or by gas or liquid pressure acting directly upon the material, e.g. jets of compressed air
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/0002—Auxiliary parts or elements of the mould
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/28—Cores; Mandrels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/38—Treating surfaces of moulds, cores, or mandrels to prevent sticking
- B28B7/388—Treating surfaces of moulds, cores, or mandrels to prevent sticking with liquid material, e.g. lubricating
Landscapes
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Moulds, Cores, Or Mandrels (AREA)
Abstract
The invention provides a forming die of a composite material revolving body component, which comprises: a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle; a shaping pressing block arranged at the small opening end; a side wall pressing block arranged at the large opening end; the upper cover is arranged above the shaping pressing block and the side wall pressing block; the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component. The forming die can solve the problem of deformation of the composite material revolving body, ensure that sufficient forming pressure can be provided for all prepregs in the forming process, and avoid layering defects of components; the two stripper ring tools ensure that the revolution body can be smoothly taken down from the die after being molded, and the molding quality and molding efficiency of the revolution body component are improved.
Description
Technical Field
The invention relates to the technical field of composite material molding and manufacturing, in particular to a molding die and a molding method of a composite material revolving body component.
Background
The ceramic matrix composite has the characteristics of excellent high temperature resistance, oxidation resistance, corrosion resistance, low density and the like, has good prospect in the fields of aerospace and the like, and particularly in the field of aeroengines, and becomes the first-choice material of hot end parts. At present, enterprises represented by the GE company in the United states successfully realize batch production of ceramic matrix composite materials, prepare different components such as a combustion chamber, a flame tube, a turbine guide vane, a turbine outer ring, a tail nozzle center and the like, and successfully realize commercial application on aeroengines such as LEAP and the like.
The ceramic matrix composite is a material-process-component integrated material, the final external dimension of the component is required to be considered in the preparation process of the material, and the forming die and the forming method of the component are one of key technologies. The existing curing method of the mature ceramic matrix composite is vacuum-autoclave and compression molding, but the vacuum-autoclave cannot accurately control the size, and the method is not suitable for preparing a revolving body component in consideration of the reasons of strict control of the size allowance of a component blank and the like. In addition, the ceramic matrix composite members prepared from prepregs are increasingly complex in shape and relatively less studied in China. Therefore, it is important to study a mold and a molding method for a revolving body member.
Disclosure of Invention
In view of the above, the present invention aims to solve the above-mentioned problems in the prior art, and provides a forming mold and a forming method for a composite material revolving body member, which improve the overall forming of a ceramic matrix composite material revolving body member, and improve the forming quality and the preparation efficiency.
The invention provides a forming die of a composite material revolving body component, which comprises:
a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle;
a shaping pressing block arranged at the small opening end;
a side wall pressing block arranged at the large opening end;
the upper cover is arranged above the shaping pressing block and the side wall pressing block;
the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component.
Preferably, the inner diameter of the demoulding ring at the large opening end is 1-2 mm larger than the diameter of the flaring of the core mould, and the outer diameter of the demoulding ring at the small opening end is 1-2 mm smaller than the diameter of the necking of the core mould.
Preferably, the inner diameter of the side wall pressing block is consistent with the outer diameter of the composite material revolving body component, the inner diameter of the composite material revolving body component is consistent with the outer diameter of the shaping pressing block, and the height of the composite material revolving body component is consistent with the height of the upper cover, the shaping pressing block and the side wall pressing block after being combined.
Preferably, the diameter of the vacuum nozzle is 10 mm-15 mm; the diameter of the bolt hole is 10 mm-15 mm.
The invention also provides a forming method of the composite material revolving body component, which adopts the forming die of the composite material revolving body component, and comprises the following steps:
a) After the bottom surface, the side surface and the surface of the core mold groove of the demolding ring are coated with demolding agent, the demolding ring and the base of the core mold are installed, and demolding cloth is stuck on the outer molded surface of the core mold; meanwhile, demolding cloth is stuck to the contact parts of the shaping pressing block, the side wall pressing block and the upper cover with the prepreg;
b) Cutting the prepreg according to the shape of the composite material revolving body component, and then paving the cut prepreg on the outer surface of the core mold, wherein the paving layer number is 2-4;
c) Placing a vacuum bag on a mould, wrapping the outer diameter of a demoulding ring by the vacuum bag, adhering and fixing a base of a core mould with the vacuum bag, connecting a vacuum nozzle with a vacuum system, and prepressing;
d) Removing the vacuum bag, and prepressing through the vacuum bag again after the residual prepreg is paved;
e) Removing the vacuum bag, mounting the shaping pressing block, the side wall pressing block and the upper cover, and placing the whole die into a vacuum press for curing treatment; after solidification, removing the shaping pressing block, the side wall pressing block and the upper cover, and separating the preform from the core mold through the demolding ring; then placing the preform into a carbonization furnace for carbonization to obtain a porous body;
f) And (3) placing the porous body into an infiltration furnace for fusion siliconizing to obtain the composite material revolving body component.
Preferably, the prepreg in step b) is a ceramic fiber prepreg, a silicon carbide fiber prepreg, a carbon fiber prepreg or an oxide fiber prepreg.
Preferably, the temperature rising rate of the curing treatment in the step e) is 1-3 ℃/min, the temperature is raised to 300-350 ℃, the pressure is 5-15 MPa, and the pressure maintaining time is 150-250 min.
Preferably, the temperature rising rate of the carbonization in the step e) is 4-6 ℃/min, the temperature is raised to 1300-1500 ℃, and the heat preservation time is 1-3 h.
Preferably, the heating rate of the fused siliconizing in the step f) is 8-12 ℃/min, the temperature is raised to 1500-1600 ℃, and the heat preservation time is 0.5-1.5 h.
Preferably, the density of the composite material revolution solid member in the step f) is 2 to 3g/cm 3 The porosity is 2% -3%.
The invention provides a forming die and a forming method of a composite material revolving body component; the forming die comprises: a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle; a shaping pressing block arranged at the small opening end; a side wall pressing block arranged at the large opening end; the upper cover is arranged above the shaping pressing block and the side wall pressing block; the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component. Compared with the prior art, the forming die and the forming method of the composite material revolving body component can solve the problem of deformation of the composite material revolving body, ensure that sufficient forming pressure can be provided for all prepregs in the forming process, and avoid layering defects of the component; the two stripper ring tools ensure that the revolution body can be smoothly taken down from the die after being molded, and the molding quality and molding efficiency of the revolution body component are improved.
Drawings
Fig. 1 is a front view of a rotor member;
FIG. 2 is a schematic diagram of the assembly of the forming die, the revolving body member, the shaping pressing block, the side wall pressing block, the upper cover and the demolding ring;
FIG. 3 is a top and side view of a stripper ring according to the present invention;
FIG. 4 is a front view and a top view of the shaped compact of the present invention;
FIG. 5 is a front and top view of a side wall compact according to the present invention;
FIG. 6 is a front and top view of the upper cover of the present invention;
figure 7 is a front and top view of the mandrel of the present invention.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides a forming die of a composite material revolving body component, which comprises:
a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle;
a shaping pressing block arranged at the small opening end;
a side wall pressing block arranged at the large opening end;
the upper cover is arranged above the shaping pressing block and the side wall pressing block;
the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component.
Referring to fig. 1 to 7, fig. 1 is a front view of a revolving body member; FIG. 2 is a schematic diagram of the assembly of the forming die, the revolving body member, the shaping pressing block, the side wall pressing block, the upper cover and the demolding ring; FIG. 3 is a top and side view of a stripper ring according to the present invention; FIG. 4 is a front view and a top view of the shaped compact of the present invention; FIG. 5 is a front and top view of a side wall compact according to the present invention; FIG. 6 is a front and top view of the upper cover of the present invention; figure 7 is a front and top view of the mandrel of the present invention; wherein, 1 is a shaping press block, 2 is a side wall press block, 3 is a core mold, 4 is demolding rings (2, 4-1 is a large-mouth end demolding ring, 4-2 is a small-mouth end demolding ring), and 5 is an upper cover.
In the invention, the forming die of the composite material revolving body component comprises a core die, a shaping pressing block, a side wall pressing block and an upper cover.
In the invention, the core mould is a male mould, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-mouth end and the small-mouth end are respectively provided with a demoulding ring (which can move upwards from the small-mouth end), and 4-6 bolt holes are uniformly distributed on the demoulding rings at the two ends; the core mold base is provided with a vacuum nozzle for vacuumizing and prepressing in the prepreg paving process of the revolving body component.
In the invention, the shaping pressing block is arranged at the small opening end and comprises two parts of structures of an edge block and a center block; the side wall pressing block is arranged at the large opening end; the upper cover is arranged above the shaping pressing block and the side wall pressing block; the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component.
In the invention, the sizing pressing block, the side wall pressing block and the upper cover jointly achieve the sizing function of the revolving body component; after solidification molding, the rotary body component is slowly moved upwards to be separated from the core mold through the demolding ring by utilizing the interaction between the screw rod and the base, so that nondestructive demolding is realized.
In the invention, the inner diameter of the demoulding ring at the large opening end is preferably 1-2 mm larger than the diameter of the flaring of the core mould, and the outer diameter of the demoulding ring at the small opening end is preferably 1-2 mm smaller than the diameter of the necking of the core mould.
In the invention, the inner diameter of the side wall pressing block is preferably consistent with the outer diameter of the composite material revolving body component, the height of the square block of the side wall pressing block is higher than that of the arc block, and the height difference is the height of the round angle of the revolving body component; the inner diameter of the composite material revolving body component is preferably consistent with the outer diameter of the shaping pressing block, and the height of the composite material revolving body component is preferably consistent with the height of the upper cover, the shaping pressing block and the side wall pressing block after being combined.
In the invention, the diameter of the vacuum nozzle is preferably 10 mm-15 mm; the diameter of the bolt hole is preferably 10 mm-15 mm.
The invention also provides a forming method of the composite material revolving body component, which adopts the forming die of the composite material revolving body component, and comprises the following steps:
a) After the bottom surface, the side surface and the surface of the core mold groove of the demolding ring are coated with demolding agent, the demolding ring and the base of the core mold are installed, and demolding cloth is stuck on the outer molded surface of the core mold; meanwhile, demolding cloth is stuck to the contact parts of the shaping pressing block, the side wall pressing block and the upper cover with the prepreg;
b) Cutting the prepreg according to the shape of the composite material revolving body component, and then paving the cut prepreg on the outer surface of the core mold, wherein the paving layer number is 2-4;
c) Placing a vacuum bag on a mould, wrapping the outer diameter of a demoulding ring by the vacuum bag, adhering and fixing a base of a core mould with the vacuum bag, connecting a vacuum nozzle with a vacuum system, and prepressing;
d) Removing the vacuum bag, and prepressing through the vacuum bag again after the residual prepreg is paved;
e) Removing the vacuum bag, mounting the shaping pressing block, the side wall pressing block and the upper cover, and placing the whole die into a vacuum press for curing treatment; after solidification, removing the shaping pressing block, the side wall pressing block and the upper cover, and separating the preform from the core mold through the demolding ring; then placing the preform into a carbonization furnace for carbonization to obtain a porous body;
f) And (3) placing the porous body into an infiltration furnace for fusion siliconizing to obtain the composite material revolving body component.
In the present invention, the prepreg is preferably a ceramic fiber prepreg, a silicon carbide fiber prepreg, a carbon fiber prepreg, or an oxide fiber prepreg, more preferably a ceramic fiber prepreg. The source of the prepreg is not particularly limited, and commercially available products known to those skilled in the art may be used.
In the present invention, the heating rate of the curing treatment is preferably 1 to 3 ℃/min, the temperature is preferably raised to 300 to 350 ℃, the pressure is preferably 5 to 15MPa, and the dwell time is preferably 150 to 250min.
In the invention, the heating rate of carbonization is preferably 4-6 ℃/min, the temperature is preferably increased to 1300-1500 ℃, and the heat preservation time is preferably 1-3 h.
In the invention, the heating rate of the fused siliconizing is preferably 8-12 ℃/min, the temperature is preferably increased to 1500-1600 ℃, and the heat preservation time is preferably 0.5-1.5 h.
In the present invention, the density of the composite material rotation body member is preferably 2 to 3g/cm 3 The porosity is preferably 2% to 3%.
The invention has the following beneficial effects:
the forming die and the forming method for the composite material revolving body component can solve the problem of high forming difficulty of the ceramic matrix composite material, can prepare the ceramic matrix composite material component with uniform fiber volume fraction and high external dimension precision, and can effectively improve the forming quality and efficiency of the ceramic matrix composite material component; meanwhile, the shaping pressing block adopted by the invention can ensure the compaction of the small-mouth end in the curing process, and ensure the shaping quality of the small-mouth end; the upper cover and the side wall pressing block can compact and guarantee the size of the bending part and the side wall in the curing process, so that the forming quality of the part is ensured; in addition, the invention is also suitable for preparing other special-shaped revolving body components.
The invention provides a forming die and a forming method of a composite material revolving body component; the forming die comprises: a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle; a shaping pressing block arranged at the small opening end; a side wall pressing block arranged at the large opening end; the upper cover is arranged above the shaping pressing block and the side wall pressing block; the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component. Compared with the prior art, the forming die and the forming method of the composite material revolving body component can solve the problem of deformation of the composite material revolving body, ensure that sufficient forming pressure can be provided for all prepregs in the forming process, and avoid layering defects of the component; the two stripper ring tools ensure that the revolution body can be smoothly taken down from the die after being molded, and the molding quality and molding efficiency of the revolution body component are improved.
In order to further illustrate the present invention, the following examples are provided.
Examples
As shown in fig. 1-2, in this embodiment, the dimension of the revolving body member is Φ200mm (small opening) ×Φ280mm (large opening) ×60deg.mm, both ends are annular bottom surfaces, the side surfaces are cylindrical, and the two end surfaces are connected, and the mold for the ceramic matrix composite member comprises:
one end of the core mold 3 is a base, the base comprises a vacuum nozzle, the diameter of the vacuum nozzle is 12mm, and the vacuum nozzle is convenient to connect with a vacuum system; a large-mouth end demoulding ring and a small-mouth end demoulding ring; 5 bolt holes with the diameter of 8mm are distributed on the demoulding rings at the two ends, so that demoulding of the two ports is realized; the external dimensions of the core mold 3 are completely identical to the internal surface dimensions of the revolving body member.
The sizes of the contact parts of the shaping pressing block 1, the side wall pressing block 2 and the upper cover 5 and the revolving body component are consistent with the external surface size of the revolving body component, so that the sizes of the revolving body component are restrained, and the size requirement is met.
The ceramic matrix composite revolving body component is prepared by adopting the forming die and comprises the following steps:
(1) After a release agent is smeared on the bottom surface, the side surface and the groove surface of the core mold 3 of the release ring 4, the release ring 4 and the base of the core mold 3 are installed; sticking a release cloth on the outer surface of the core mold 3; simultaneously, demolding cloth is stuck to the contact parts of the sizing pressing block 1, the side wall pressing block 2 and the upper cover 5 with the prepreg;
(2) Cutting the ceramic fiber prepreg according to the shape of the revolving body component, and then paving the cut ceramic fiber prepreg on the outer surface of the core mold 3, wherein the paving layer number is 3;
(3) Placing a vacuum bag on a mould, wrapping the outer diameter of a demoulding ring by the vacuum bag, adhering and fixing a base of a core mould with the vacuum bag, connecting a vacuum nozzle with a vacuum system, and prepressing a revolving body component;
(4) Removing the vacuum bag, and prepressing the revolving body component through the vacuum bag again after the residual prepreg of the revolving body is paved;
(5) Removing the vacuum bag, mounting the shaping pressing block 1, the side wall pressing block 2 and the upper cover 5, and placing the whole die into a vacuum press for curing treatment;
(6) Placing the die on a press, setting the heating rate of the press to be 2 ℃/min, heating to 330 ℃, setting the pressure to be 10MPa, and maintaining the pressure for 200min; curing treatment temperature is 330 ℃, pressure is 10MPa, and dwell time is 200min;
(7) After solidification, removing the shaping pressing block 1, the side wall pressing block 2 and the upper cover 5, and separating the revolving body component from the core mold 3 through a demolding ring; and (3) placing the preform into a carbonization furnace for carbonization, wherein the heating rate of the carbonization furnace is set to be 5 ℃/min, and heating to 1400 ℃ and preserving heat for 2 hours to obtain the porous body cylinder.
(8) The porous body is put into an infiltration furnace for fusion siliconizing, the temperature of the infiltration furnace is set to be 10 ℃/min,heating to 1550 ℃ and preserving heat for 1h to prepare a compact ceramic matrix composite revolving body component, wherein the density of the component reaches 2.72g/cm 3 The porosity was 2.5%.
Experimental results show that by the forming die and the forming method for the composite material revolving body component, more sufficient forming pressure can be provided for small opening ends and turning in the forming process, the integral forming of the component is realized, meanwhile, the demolding rings at the two ends are used for demolding simultaneously, the smooth removal of the component is ensured, and the forming quality and efficiency of the component are effectively improved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A molding die for a composite material rotation body member, comprising:
a core mold; the core mold is a male mold, the shape of the outer molded surface is consistent with the shape of the inner molded surface of the revolving body component, the large-opening end and the small-opening end are respectively provided with a demolding ring, and 4-6 bolt holes are uniformly distributed on the demolding rings; the mandrel base is provided with a vacuum nozzle;
a shaping pressing block arranged at the small opening end;
a side wall pressing block arranged at the large opening end;
the upper cover is arranged above the shaping pressing block and the side wall pressing block;
the shaping pressing block, the side wall pressing block and the upper cover integrally form a female die, and the shape of the inner molded surface is consistent with that of the outer molded surface of the revolving body component.
2. The molding die for a composite material revolving body member according to claim 1, wherein the inner diameter of the stripper ring of the large-mouth end is 1mm to 2mm larger than the diameter of the flaring of the core mold, and the outer diameter of the stripper ring of the small-mouth end is 1mm to 2mm smaller than the diameter of the necking of the core mold.
3. The composite material revolving body member molding die according to claim 1, wherein the inner diameter of the side wall pressing block is identical to the outer diameter of the composite material revolving body member, the inner diameter of the composite material revolving body member is identical to the outer diameter of the shaping pressing block, and the height of the composite material revolving body member is identical to the combined height of the upper cover, the shaping pressing block and the side wall pressing block.
4. The molding die for a composite material rotation body member according to claim 1, wherein the diameter of the vacuum nozzle is 10mm to 15mm; the diameter of the bolt hole is 10 mm-15 mm.
5. A method for molding a composite material rotation body member, characterized by using the molding die for a composite material rotation body member according to any one of claims 1 to 4, comprising the steps of:
a) After the bottom surface, the side surface and the surface of the core mold groove of the demolding ring are coated with demolding agent, the demolding ring and the base of the core mold are installed, and demolding cloth is stuck on the outer molded surface of the core mold; meanwhile, demolding cloth is stuck to the contact parts of the shaping pressing block, the side wall pressing block and the upper cover with the prepreg;
b) Cutting the prepreg according to the shape of the composite material revolving body component, and then paving the cut prepreg on the outer surface of the core mold, wherein the paving layer number is 2-4;
c) Placing a vacuum bag on a mould, wrapping the outer diameter of a demoulding ring by the vacuum bag, adhering and fixing a base of a core mould with the vacuum bag, connecting a vacuum nozzle with a vacuum system, and prepressing;
d) Removing the vacuum bag, and prepressing through the vacuum bag again after the residual prepreg is paved;
e) Removing the vacuum bag, mounting the shaping pressing block, the side wall pressing block and the upper cover, and placing the whole die into a vacuum press for curing treatment; after solidification, removing the shaping pressing block, the side wall pressing block and the upper cover, and separating the preform from the core mold through the demolding ring; then placing the preform into a carbonization furnace for carbonization to obtain a porous body;
f) And (3) placing the porous body into an infiltration furnace for fusion siliconizing to obtain the composite material revolving body component.
6. The molding method according to claim 5, wherein the prepreg in step b) is a ceramic fiber prepreg, a silicon carbide fiber prepreg, a carbon fiber prepreg, or an oxide fiber prepreg.
7. The molding method according to claim 5, wherein the curing treatment in step e) has a heating rate of 1 to 3 ℃/min, a heating to 300 to 350 ℃, a pressure of 5 to 15MPa, and a dwell time of 150 to 250min.
8. The molding method as claimed in claim 5, wherein the carbonization in step e) is performed at a heating rate of 4 to 6 ℃/min, heating to 1300 to 1500 ℃ and maintaining for 1 to 3 hours.
9. The molding method according to claim 5, wherein the heating rate of the molten siliconizing in the step f) is 8-12 ℃/min, the temperature is raised to 1500-1600 ℃, and the heat preservation time is 0.5-1.5 h.
10. The method according to claim 5, wherein the density of the composite material rotation body member in step f) is 2 to 3g/cm 3 The porosity is 2% -3%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311028047.4A CN116968154A (en) | 2023-08-15 | 2023-08-15 | Forming die and forming method for composite material revolving body component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311028047.4A CN116968154A (en) | 2023-08-15 | 2023-08-15 | Forming die and forming method for composite material revolving body component |
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| Publication Number | Publication Date |
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| CN116968154A true CN116968154A (en) | 2023-10-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202311028047.4A Pending CN116968154A (en) | 2023-08-15 | 2023-08-15 | Forming die and forming method for composite material revolving body component |
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| Country | Link |
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| CN (1) | CN116968154A (en) |
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