CN116423879A - Forming die of composite material annular T-shaped reinforcing frame and preparation method thereof - Google Patents
Forming die of composite material annular T-shaped reinforcing frame and preparation method thereof Download PDFInfo
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- CN116423879A CN116423879A CN202310502646.9A CN202310502646A CN116423879A CN 116423879 A CN116423879 A CN 116423879A CN 202310502646 A CN202310502646 A CN 202310502646A CN 116423879 A CN116423879 A CN 116423879A
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- 230000003014 reinforcing effect Effects 0.000 title claims abstract description 42
- 239000002131 composite material Substances 0.000 title claims abstract description 35
- 238000002360 preparation method Methods 0.000 title claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 200
- 238000000465 moulding Methods 0.000 claims abstract description 41
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 18
- 239000004593 Epoxy Substances 0.000 claims description 18
- 239000004917 carbon fiber Substances 0.000 claims description 18
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 18
- 238000005056 compaction Methods 0.000 claims description 12
- 210000001503 joint Anatomy 0.000 claims description 12
- 230000007547 defect Effects 0.000 claims description 4
- 238000009966 trimming Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 8
- 238000010586 diagram Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 239000004484 Briquette Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- 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
- B29C70/30—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention provides a forming die of a composite material annular T-shaped reinforcing frame and a preparation method thereof, and relates to the technical field of aircraft accessory forming tools. A molding die of a composite material annular T-shaped reinforcing frame comprises a lower die plate, a pressing plate assembly, a side pressing movable block assembly and an upper die plate; the inner side surface of the lower template is provided with a first forming pressing groove, and a first forming protruding frame is arranged in the first forming pressing groove; the pressing plate component is connected with the first forming convex frame; the side pressure movable block component is connected in the first forming pressing groove; the inner side of the upper template is provided with a second forming protruding frame which is connected with the first forming pressing groove and sleeved with the outside of the side pressing movable block assembly. The technical problems of poor bearing capacity, high manufacturing cost and long production period of the existing die after processing are solved. The die disclosed by the invention has the advantages that the lower die plate, the pressing plate assembly, the side pressing movable block assembly and the upper die plate are combined, the bearing capacity of a molded product is high, and the processing efficiency of the product is improved.
Description
Technical Field
The invention relates to the technical field of aircraft accessory forming tools, in particular to a forming die of a composite material annular T-shaped reinforcing frame and a preparation method thereof.
Background
The carrier spacecraft is developing in the direction of large-scale and light weight, and the composite material with high specific strength and high specific rigidity is promoted to be widely applied gradually. The composite material annular T-shaped reinforcing frame is a main component part of the rocket cabin section, plays a role in supporting and connecting, and is an integrally formed part with high structural efficiency.
In the prior art, when the annular T-shaped reinforcing frame made of the composite material is manufactured, a single-sided mold autoclave or a vacuum bag is mainly adopted for hot press molding.
During processing, the fiber inside the product is easily damaged, and the bearing capacity of the product is reduced. The manufacturing cost of the whole product is high. After the product is molded, the molding surface of the assembly surface has low molding surface precision; secondary processing is also needed, the preparation period of the product is long, and the processing efficiency is low.
Disclosure of Invention
The invention aims to provide a forming die for a composite material annular T-shaped reinforcing frame, which is used for solving the problems in the prior art that a single-sided die autoclave or a vacuum bag is adopted for hot press forming of the composite material annular T-shaped reinforcing frame, the bearing capacity of a product is poor, the manufacturing cost is high, and the molded surface precision of an assembly surface is low after the product is formed; secondary processing is also needed, which results in the technical problems of long production period and low processing efficiency of the product.
The invention also provides a preparation method of the composite material annular T-shaped reinforcing frame, which aims to solve the technical problems of long preparation period and low processing efficiency of products in the prior art.
The invention provides a forming die of a composite material annular T-shaped reinforcing frame, which comprises a lower die plate, a pressing plate assembly, a side pressing movable block assembly and an upper die plate, wherein the lower die plate is arranged on the lower die plate;
the inner side surface of the lower template is provided with a first forming pressing groove, and a first forming protruding frame is arranged in the first forming pressing groove;
the pressing plate component is connected to the first forming convex frame;
the side pressure movable block component is of a square hollow structure; the side pressure movable block component is connected in the first forming pressing groove and sleeved on the outer side of the pressing plate component;
the inner side surface of the upper template is provided with a second forming protruding frame which is connected with the first forming pressing groove and sleeved with the outer part of the side pressing movable block assembly.
Further, the pressing plate assembly comprises a middle connecting plate, a top pressing block, a bottom pressing block, a left upper pressing block, a left middle pressing block, a left lower pressing block, a right upper pressing block, a right middle pressing block and a right lower pressing block;
the top end pressing block and the bottom end pressing block are respectively connected with the top end and the bottom end of the middle connecting plate;
the left upper pressing block, the left middle pressing block and the left lower pressing block are sequentially connected with the left side of the middle connecting plate, and the left upper pressing block and the left lower pressing block are respectively connected with the left sides of the top pressing block and the bottom pressing block so as to form a left side pressing plate die;
the right side upper pressing block, the right side middle pressing block and the right side lower pressing block are sequentially connected with the right side of the middle connecting plate, and the right side upper pressing block and the right side lower pressing block are respectively connected with the right sides of the top pressing block and the bottom pressing block, so that the right side pressing plate die is formed.
Further, the side pressure movable block assembly comprises a left upper movable block, a left lower movable block, a right upper movable block, a right lower movable block and a right lower movable block;
the left upper end movable block, the left upper movable block, the left lower movable block and the left lower end movable block are sequentially connected, so that the left side pressure movable block mold is formed;
the right upper movable block, the right lower movable block and the right lower movable block are connected in sequence, so that the right side movable block mould is formed;
the inner side end of the left upper end movable block is connected with the inner side end of the right upper end movable block; the inner side end of the left lower end movable block is connected with the inner side end of the right lower end movable block.
Further, a second molding pressing groove is formed in the first molding protruding frame;
the inner side surface of the pressing plate assembly is provided with a third forming convex frame;
the third forming convex frame is connected with the second forming pressing groove.
Further, a first forming pressing block is arranged in the second forming pressing groove;
a fourth square protruding frame is arranged in the third forming protruding frame;
the first forming press block is connected with the fourth square protruding frame.
Further, a third forming pressing groove is formed in the first forming pressing block;
a second forming press block is arranged in the fourth square protruding frame;
the second forming press block is connected with the third forming press groove.
Further, a first bar-shaped pressing block is arranged on the inner side surface of the side pressure movable block assembly;
the bottom of the side pressure loose piece assembly is provided with a second bar-shaped pressing block.
Further, the cross section of the side pressure movable block component is cone-shaped with narrow upper part and wide lower part.
The invention provides a preparation method of a composite material annular T-shaped reinforcing frame, which comprises the following steps:
step one: mold preparation
Cleaning a die, namely respectively smearing release agents on the surfaces of the lower die plate, the pressing plate assembly, the side pressing movable block assembly and the upper die plate;
the middle connecting plate, the top end pressing block, the bottom end pressing block, the left upper pressing block, the left middle pressing block, the left lower pressing block, the right upper pressing block, the right middle pressing block and the right lower pressing block are sequentially connected by adopting a connecting piece, and the connecting piece is connected to form a pressing plate assembly;
step two: discharging
Cutting and blanking the carbon fiber epoxy unidirectional prepreg according to the size of the annular T-shaped reinforcing frame and the layering sequence;
step three: first lay-up
Carrying out carbon fiber epoxy unidirectional prepreg web layering on the surface of the pressing plate assembly according to the product length direction of 0 DEG and in the circulation sequence of 45 DEG, -45 DEG, 0 DEG and 90 DEG; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
on the surface of the lower template, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees according to the direction of 0 degrees of the length direction of the product, and performing carbon fiber epoxy unidirectional prepreg web layering on the surface of the lower template; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step four: assembly
Connecting the pressing plate assembly to a first forming convex frame of the lower template along a first forming pressing groove;
step five: second ply
At the edge of the assembled die, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees to lay a carbon fiber epoxy unidirectional prepreg edge plate on the surface of the assembled die in the direction of 0 degrees in the circumferential direction of the assembled die; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step six: compaction
Sequentially placing the left upper end loose piece, the left upper portion loose piece, the left lower portion loose piece, the right upper end loose piece, the right upper portion loose piece, the right lower portion loose piece and the right lower portion loose piece into a groove of a lower die plate according to marks to form a side pressure loose piece assembly;
connecting the side pressure movable block assembly in a first forming pressing groove of the lower template; then pressing the upper template on the top of the side pressure movable block assembly, and connecting and fixing the upper template and the lower template by adopting a connecting piece;
after connection, the mould is put into a hot press to be pre-compacted according to a compaction system;
step seven: trimming
After the mold is pre-pressed, repairing defects on the surface of the product by using carbon fiber epoxy unidirectional prepreg;
step eight: third ply
At the edge of the assembled die, the circumferential direction of the assembled die is 0 DEG, and the carbon fiber epoxy unidirectional prepreg edge plate layering is carried out on the die by adopting the circulation sequence of-45 DEG and 45 DEG in sequence; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step nine: curing
After the layering is completed, connecting the upper template to the lower template by adopting a connecting piece for assembly and die assembly;
then the mould is put into a hot press to be cured according to a curing system;
step ten: demolding
The upper template is disassembled by using a reverse jacking bolt; then taking out the side pressure movable block assembly; then the pressing block assembly and the product are demolded from the lower die plate by using the anti-jacking bolts;
removing the connecting piece on the pressing plate assembly, and sequentially taking out all parts on the pressing plate assembly;
at this time, the annular T-shaped reinforcing frame made of the composite material can be manufactured.
The invention provides a forming die of a composite material annular T-shaped reinforcing frame, which has the following technical effects:
the invention sets the first shaping pressing groove on the inner side of the lower template, the first shaping protruding frame is set in the first shaping pressing groove; the pressing plate component is connected to the first forming protruding frame, and the surface of the product is compacted and fixed. The side pressure loose piece assembly adopts a square hollow structure so as to be matched with the pressing plate assembly. The side pressure movable block component is connected with the first forming pressing groove and sleeved on the outer side of the pressing plate component to compact and fix the side face of the product. The inner side surface of the upper template is provided with a second forming protruding frame, the second forming protruding frame is connected with the first forming pressing groove and sleeved with the outside of the side pressing movable block assembly, the upper template is used for reinforcing the pressing plate assembly and the side pressing movable block assembly again, after products are formed, the bearing capacity of the products is high, and the profile precision of the assembly surface is high; the product is formed without secondary processing, so that the processing efficiency is improved, the production period of the product is shortened, and the manufacturing cost of the product is low.
According to the preparation method of the annular T-shaped reinforcing frame made of the composite material, the steps of mould preparation, blanking, first layering, assembly, second layering, compaction, trimming, third layering, solidification, demoulding and the like are sequentially adopted, the production period of a product is shortened, and the processing efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram showing an exploded state of a molding die of a circumferential T-shaped reinforcing frame made of a composite material according to an embodiment of the present invention;
FIG. 2 is a schematic view of a usage state of a molding die of a circumferential T-shaped reinforcing frame made of a composite material according to an embodiment of the present invention;
FIG. 3 is a schematic view of the internal structure of a lower template according to an embodiment of the present invention;
FIG. 4 is a schematic view of a platen assembly according to an embodiment of the present invention;
FIG. 5 is an exploded view of a platen assembly according to an embodiment of the present invention;
FIG. 6 is a schematic view of an internal structure of a platen assembly according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a side pressure loose piece assembly according to an embodiment of the present invention;
FIG. 8 is an exploded view of a side pressure loose piece assembly according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of an internal structure of a side pressure loose piece assembly according to an embodiment of the present invention;
fig. 10 is a schematic view of the internal structure of an upper template according to an embodiment of the present invention;
FIG. 11 is a flowchart of a method for manufacturing a composite circumferential T-shaped reinforcing frame according to an embodiment of the present invention;
fig. 12 is a schematic structural diagram of a composite circumferential T-shaped reinforcing frame according to an embodiment of the present invention.
Icon:
100-lower template; 200-a platen assembly; 300-side pressure loose piece assembly; 400-upper template; 500-a composite circumferential T-shaped reinforcing frame;
101-a first molding press; 102-a first shaped raised frame; 103-a second molding press; 104-a first forming briquette; 105-a third forming press;
201-an intermediate connection plate; 202-top briquetting; 203-pressing the bottom end; 204-upper press block on left side; 205-left middle briquetting; 206-left side pressing block; 207-right upper press block; 208-right middle press block; 209-right side lower pressing block; 210-a third shaped raised frame; 211-fourth square raised frames; 212-a second shaped compact;
301-upper left end loose piece; 302-left upper loose piece; 303-left lower loose piece; 304-a left lower end loose piece; 305-right upper end loose piece; 306-right upper loose piece; 307-lower right-hand flap; 308-right lower end loose piece; 309-a first bar press; 310-a second bar-shaped briquette; 401-second shaped raised frame.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. 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.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of 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. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
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 mechanically or electrically connected; 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 will be understood in specific cases by those of ordinary skill in the art.
As shown in fig. 1 to 10, the molding die for the annular T-shaped reinforcing frame made of the composite material provided by the embodiment is made of steel materials, so that the structural strength of the whole die is ensured.
Referring to fig. 1 and 2, the molding die comprises a lower die plate 100, a pressing plate assembly 200, a side pressing loose piece assembly 300 and an upper die plate 400 from bottom to top in sequence;
referring to fig. 3, a first molding press groove 101 is provided on an inner side surface of the lower die plate 100, and a first molding protrusion frame 102 is provided in the first molding press groove 101. The first molding pressing groove 101 is a square groove, and the first molding protruding frame 102 is a square protruding frame.
The pressing plate assembly 200 is connected to the first forming convex frame 102 by adopting screws;
referring to fig. 7, the side pressure loose piece assembly 300 is a square hollow structure. The side pressure loose piece assembly 300 is connected into the first forming pressing groove 101 by adopting a screw and sleeved on the outer side of the pressing plate assembly 200, so as to provide lateral force for the pressing plate assembly 200.
Referring to fig. 10, a second molding protrusion frame 401 is provided on the inner side of the upper mold plate 400, and the second molding protrusion frame 401 is screwed into the first molding press groove 101 and is sleeved outside the side press movable block assembly 300, thereby locking the position of the side press movable block assembly 300.
In the above embodiment, the lower die plate 100, the pressing plate assembly 200, the side pressing movable block assembly 300 and the upper die plate 400 are matched, so that the whole of the annular T-shaped reinforcing frame is formed in the autoclave, the profile precision of the assembling surface of the annular T-shaped reinforcing frame is ensured, the die is easy to operate, secondary processing is not needed, the production period of a product is short, the production efficiency of the product is improved, and the manufacturing cost is low. And after the product is molded, the bearing capacity is strong, the positioning is accurate, and the profile precision of the assembly surface is high.
Referring to fig. 4 and 5, the platen assembly 200 includes a middle connection plate 201, a top end press block 202, a bottom end press block 203, a left side upper press block 204, a left side middle press block 205, a left side lower press block 206, a right side upper press block 207, a right side middle press block 208, and a right side lower press block 209;
the top end pressing block 202 and the bottom end pressing block 203 are respectively connected with the top end and the bottom end of the middle connecting plate 201 by adopting screws;
the left upper pressing block 204, the left middle pressing block 205 and the left lower pressing block 206 are sequentially connected with the left side of the middle connecting plate 201 by adopting screws, and the left upper pressing block 204 and the left lower pressing block 206 are respectively connected with the left sides of the top pressing block 202 and the bottom pressing block 203 by adopting screws so as to form a left side pressing plate die;
the right upper pressing block 207, the right middle pressing block 208 and the right lower pressing block 209 are sequentially connected with the right side of the middle connecting plate 201 by adopting screws, and the right upper pressing block 207 and the right lower pressing block 209 are respectively connected with the right sides of the top pressing block 202 and the bottom pressing block 203 by adopting screws so as to enable the right pressing plate die to be formed. The pressing plate assembly 200 adopts the eight pressing blocks to be connected through screws, so that the top pressure is provided for the product, and the product molding is ensured.
Referring to fig. 7 and 8, the side pressure shoe assembly 300 includes a left upper end shoe 301, a left upper shoe 302, a left lower shoe 303, a left lower shoe 304, a right upper shoe 305, a right upper shoe 306, a right lower shoe 307, and a right lower shoe 308;
the left upper movable block 301, the left upper movable block 302, the left lower movable block 303 and the left lower movable block 304 are connected by screws in sequence, so that the left side pressure movable block mould is formed;
the right upper movable block 305, the right upper movable block 306, the right lower movable block 307 and the right lower movable block 308 are connected by screws in sequence, so that the right side movable block mold is formed;
the inner side end of the left upper end movable block 301 is connected with the inner side end of the right upper end movable block 305 by adopting a screw; the inner side end of the left lower end movable block 304 is connected with the inner side end of the right lower end movable block 308 by adopting a screw. The side pressure loose piece assembly 300 adopts the eight loose pieces to be connected through screws, provides lateral pressure for the product, and ensures the lateral forming effect of the product.
Referring to fig. 3 and 6, in the above embodiment, the first molding protrusion frame 102 is provided with the second molding pressing groove 103 inside; the second molding press 103 is a square groove.
The inner side of the platen assembly 200 is provided with a third shaped raised frame 210; the third shaped raised frame 210 is a square raised frame.
The third forming protruding frame 210 is connected and fixed with the second forming pressing groove 103 by adopting a screw, and the top of the lower die plate 100 is crimped and fixed, so that the forming of the surface of a product is ensured.
Referring to fig. 3 and 6, in the above embodiment, the second molding press 103 is provided with the first molding press 104 inside; first shaped compact 104 is rectangular.
A fourth square boss 211 is provided in the third molding boss 210; the fourth square boss frame 211 is a square boss frame.
The first forming press block 104 is fixedly connected with the fourth square protruding frame 211 by adopting screws, and the top of the lower die plate 100 is crimped and fixed again, so that the forming of the surface of a product is ensured.
Referring to fig. 3 and 6, in the above embodiment, the first molding press 104 is provided with a third molding press groove 105 inside; the third forming nip 105 is a rectangular recess.
A second forming press block 212 is arranged in the fourth square protruding frame 211; the second forming press 212 is a rectangular bump.
The second forming press block 212 is fixedly connected with the third forming press groove 105 by a screw, and is used for fixedly pressing and connecting the top center position of the lower die plate 100, so that the center position of the product surface is formed.
Referring to fig. 9, in the above embodiment, the inner side surface of the side pressure flapper assembly 300 is provided with a first bar-shaped pressing block 309; the number of the first bar-shaped compacts 309 is plural, and the plural first bar-shaped compacts 309 are pressure-bonded and fixed from the side of the platen assembly 200.
The bottom of the side pressing movable block assembly 300 is provided with a plurality of second bar-shaped pressing blocks 310, the second bar-shaped pressing blocks 310 are compressed with the inside of the first molding pressing groove 101, and the bottom of the side pressing movable block assembly 300 is compressed and fixed.
Referring to fig. 1 and 9, in the above embodiment, the side pressure loose-piece assembly 300 has a tapered shape with a narrow upper portion and a wide lower portion. The taper surface is sleeved outside the pressing plate assembly 200, so that the pressing force of the side surface of the pressing plate assembly 200 is ensured.
As shown in fig. 11, a method for preparing a composite circumferential T-shaped reinforcing frame includes the following steps:
step one: mold preparation
Cleaning the mold, namely respectively smearing three times of release agents on the surfaces of the lower mold plate 100, the pressing plate assembly 200, the side pressing movable block assembly 300 and the upper mold plate 400;
the middle connecting plate 201, the top end pressing block 202, the bottom end pressing block 203, the left upper pressing block 204, the left middle pressing block 205, the left lower pressing block 206, the right upper pressing block 207, the right middle pressing block 208 and the right lower pressing block 209 are sequentially connected by adopting connecting pieces, and the pressing plate assembly 200 is formed after connection;
the connecting piece is a pin and a screw;
step two: discharging
Cutting and blanking the carbon fiber epoxy unidirectional prepreg by using an automatic blanking machine according to the size and the layering sequence of the annular T-shaped reinforcing frame;
step three: first lay-up
On the surface of the pressing plate assembly 200, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees according to the direction of 0 degrees of the product length direction, and layering carbon fiber epoxy unidirectional prepreg webs on the surface of the pressing plate assembly 200; when the prepreg is paved, compaction is ensured as much as possible, and air brought between layers is squeezed out by an electric iron or a pressing plate; when the layers are butted, each layer is staggered to open the butt joint seam;
on the surface of the lower template 100, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees according to the direction of 0 degrees of the product length direction, and layering carbon fiber epoxy unidirectional prepreg webs on the surface of the lower template 100; when the prepreg is paved, compaction is ensured as much as possible, and air brought between layers is squeezed out by an electric iron or a pressing plate; when the layers are butted, each layer is staggered to open the butt joint seam;
step four: assembly
Referring to fig. 1, a platen assembly 200 is attached to a first forming raised frame 102 of a lower die plate 100 along a first forming platen groove 101;
step five: second ply
At the edge of the assembled die, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees to lay a carbon fiber epoxy unidirectional prepreg edge plate on the surface of the assembled die with the circumferential direction of the assembled die being 0 degrees; when the prepreg is paved, compaction is ensured as much as possible, and air brought between layers is squeezed out by an electric iron or a pressing plate; when the layers are butted, each layer is staggered to open the butt joint seam;
step six: compaction
Sequentially placing the left upper end movable block 301, the left upper movable block 302, the left lower movable block 303, the left lower end movable block 304, the right upper end movable block 305, the right upper movable block 306, the right lower movable block 307 and the right lower end movable block 308 into the groove of the lower template 100 according to marks to form a side pressure movable block assembly 300;
by virtue of the groove side surfaces and the groove positioning after the upper template 400 is clamped, the movable blocks have activity before positioning, and can provide lateral pressure in the sliding process.
Referring to fig. 1, the side pressure loose piece assembly 300 is connected in the first molding press groove 101 of the lower die plate 100 and is sleeved outside the press plate assembly 200;
pressing the upper template 400 on the top of the side pressure movable block assembly 300, and connecting and fixing the upper template with the lower template 100 by adopting a connecting piece;
the connecting piece is a screw;
after connection, the mould is put into a hot press to be pre-compacted according to a compaction system; pressurizing to 2MPa after the compaction system is 120 ℃/0.5 h;
step seven: trimming
After the mold is pre-pressed, repairing defects on the surface of the product by using carbon fiber epoxy unidirectional prepreg; the defect types include: folds, pits, protrusions, etc.;
step eight: third ply
At the edge of the assembled die, the circumferential direction of the assembled die is 0 DEG, and the surface of the assembled die is subjected to carbon fiber epoxy unidirectional prepreg edge plate layering sequentially in a circulation sequence of-45 DEG and 45 DEG; when the prepreg is paved, compaction is ensured as much as possible, and air brought between layers is squeezed out by an electric iron or a pressing plate; when the layers are butted, each layer is staggered to open the butt joint seam;
step nine: curing
After the layering is completed, the product is assembled and matched by connecting the upper template 400 to the lower template 100 by adopting a connecting piece according to the illustration of fig. 1; the connecting piece is a pin or a screw;
then the mould is put into a hot press to be cured according to a curing system; pressurizing to 3MPa after the curing system is 120 ℃/0.5h, and 180 ℃/3h;
step ten: demolding
The upper mold plate 400 is disassembled by using the anti-jacking bolts; then the side pressure loose piece assembly 300 is taken out; then using the anti-jacking bolts to demold the briquetting assembly 200 together with the product from the lower template 100;
removing the connecting pieces on the pressing plate assembly 200, and sequentially taking out all parts on the pressing plate assembly 200; the connecting piece is a screw and a pin puller;
at this point, as shown in fig. 12, a composite circumferential T-shaped reinforcing frame 500 can be produced.
According to the preparation method of the annular T-shaped reinforcing frame made of the composite material, the whole annular T-shaped reinforcing frame is placed into an autoclave to be integrally formed, and the operation method is simple; after the product is molded, the molded surface precision of the assembling surface of the annular T-shaped reinforcing frame is improved; the bearing capacity of the product is strong, the positioning is accurate, and the production efficiency is improved.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (9)
1. The forming die of the composite material annular T-shaped reinforcing frame is characterized by comprising a lower die plate (100), a pressing plate assembly (200), a side pressing movable block assembly (300) and an upper die plate (400);
a first forming pressing groove (101) is formed in the inner side surface of the lower die plate (100), and a first forming protruding frame (102) is arranged in the first forming pressing groove (101);
the pressing plate assembly (200) is connected to the first forming convex frame (102);
the side pressure movable block assembly (300) is of a square hollow structure; the side pressure movable block assembly (300) is connected in the first forming pressing groove (101) and sleeved on the outer side of the pressing plate assembly (200);
the inner side surface of the upper die plate (400) is provided with a second forming protruding frame (401), and the second forming protruding frame (401) is connected with the inside of the first forming pressing groove (101) and sleeved with the outside of the side pressing movable block assembly (300).
2. The molding die of the composite circumferential T-shaped reinforcing frame according to claim 1, wherein the platen assembly (200) comprises a middle connecting plate (201), a top end press block (202), a bottom end press block (203), a left side upper press block (204), a left side middle press block (205), a left side lower press block (206), a right side upper press block (207), a right side middle press block (208) and a right side lower press block (209);
the top end pressing block (202) and the bottom end pressing block (203) are respectively connected with the top end and the bottom end of the middle connecting plate (201);
the left upper pressing block (204), the left middle pressing block (205) and the left lower pressing block (206) are sequentially connected with the left side of the middle connecting plate (201), and the left upper pressing block (204) and the left lower pressing block (206) are respectively connected with the left sides of the top pressing block (202) and the bottom pressing block (203) so as to form a left side pressing plate die;
the right side upper pressing block (207), the right side middle pressing block (208) and the right side lower pressing block (209) are sequentially connected to the right side of the middle connecting plate (201), and the right side upper pressing block (207) and the right side lower pressing block (209) are respectively connected with the right sides of the top pressing block (202) and the bottom pressing block (203) so that the right side pressing plate die is formed.
3. The molding die for the composite circumferential T-shaped reinforcing frame according to claim 2, wherein the side pressure loose piece assembly (300) comprises a left upper end loose piece (301), a left upper end loose piece (302), a left lower end loose piece (303), a left lower end loose piece (304), a right upper end loose piece (305), a right upper end loose piece (306), a right lower end loose piece (307) and a right lower end loose piece (308);
the left upper end movable block (301), the left upper movable block (302), the left lower movable block (303) and the left lower end movable block (304) are sequentially connected, so that a left side pressure movable block mould is formed;
the right upper end movable block (305), the right upper movable block (306), the right lower movable block (307) and the right lower end movable block (308) are sequentially connected, so that the right side movable block mould is formed;
the inner side end of the left upper end movable block (301) is connected with the inner side end of the right upper end movable block (305); the inner side end of the left lower end movable block (304) is connected with the inner side end of the right lower end movable block (308).
4. A mould for forming a composite circumferential T-shaped reinforcing frame according to claim 3, wherein a second forming indent (103) is provided in the first forming boss (102);
a third forming raised frame (210) is arranged on the inner side surface of the pressing plate assembly (200);
the third forming convex frame (210) is connected with the second forming pressing groove (103).
5. The molding die of the composite circumferential T-shaped reinforcing frame according to claim 4, wherein a first molding press block (104) is arranged in the second molding press groove (103);
a fourth square raised frame (211) is arranged in the third forming raised frame (210);
the first forming press block (104) is connected with the fourth square protruding frame (211).
6. The molding die of the composite circumferential T-shaped reinforcing frame according to claim 5, wherein a third molding press groove (105) is formed in the first molding press block (104);
a second forming press block (212) is arranged in the fourth square protruding frame (211);
the second forming press (212) is connected to the third forming press (105).
7. The molding die for the annular T-shaped reinforcing frame made of the composite material according to claim 6, wherein a first bar-shaped pressing block (309) is arranged on the inner side surface of the side pressing movable block assembly (300);
the bottom of the side pressure movable block assembly (300) is provided with a second bar-shaped pressing block (310).
8. The molding die for the circumferential T-shaped reinforcing frame made of composite material according to claim 7, wherein said side pressure loose piece assembly (300) has a tapered shape with a narrower upper portion and a wider lower portion.
9. The preparation method of the composite material annular T-shaped reinforcing frame is characterized by comprising the following steps of:
step one: mold preparation
Cleaning a die, namely coating release agents on the surfaces of a lower die plate (100), a pressing plate assembly (200), a side pressing movable block assembly (300) and an upper die plate (400) respectively;
the middle connecting plate (201), the top pressing block (202), the bottom pressing block (203), the left upper pressing block (204), the left middle pressing block (205), the left lower pressing block (206), the right upper pressing block (207), the right middle pressing block (208) and the right lower pressing block (209) are sequentially connected by adopting connecting pieces, and the pressing plate assembly (200) is formed after connection;
step two: discharging
Cutting and blanking the carbon fiber epoxy unidirectional prepreg according to the size of the annular T-shaped reinforcing frame and the layering sequence;
step three: first lay-up
Carrying out carbon fiber epoxy unidirectional prepreg web layering on the surface of the pressing plate assembly (200) according to the sequence of 45 degrees, 0 degrees and 90 degrees in turn on the surface of the pressing plate assembly (200) in the direction of 0 degrees in the length direction of the product; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
sequentially layering carbon fiber epoxy unidirectional prepreg webs on the surface of the lower template (100) in a cycle sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees according to the product length direction of 0 degrees; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step four: assembly
Connecting a pressing plate assembly (200) to a first forming convex frame (102) of a lower die plate (100) along a first forming pressing groove (101);
step five: second ply
At the edge of the assembled die, sequentially adopting the circulation sequence of 45 degrees, -45 degrees, 0 degrees and 90 degrees to lay a carbon fiber epoxy unidirectional prepreg edge plate on the surface of the assembled die in the direction of 0 degrees in the circumferential direction of the assembled die; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step six: compaction
Sequentially placing the left upper end movable block (301), the left upper movable block (302), the left lower movable block (303), the left lower end movable block (304), the right upper end movable block (305), the right upper movable block (306), the right lower movable block (307) and the right lower end movable block (308) into a groove of a lower template (100) according to marks to form a side pressure movable block assembly (300);
connecting the side pressure movable block assembly (300) in a first forming pressing groove (101) of the lower die plate (100); then pressing the upper template (400) on the top of the side pressure movable block assembly (300), and connecting and fixing the upper template and the lower template (100) by adopting a connecting piece;
after connection, the mould is put into a hot press to be pre-compacted according to a compaction system;
step seven: trimming
After the mold is pre-pressed, repairing defects on the surface of the product by using carbon fiber epoxy unidirectional prepreg;
step eight: third ply
At the edge of the assembled die, the circumferential direction of the assembled die is 0 DEG, and the carbon fiber epoxy unidirectional prepreg edge plate layering is carried out on the die by adopting the circulation sequence of-45 DEG and 45 DEG in sequence; when the prepreg is paved, air brought in between layers is extruded out; when the layers are butted, each layer is staggered to open the butt joint seam;
step nine: curing
After the layering is completed, connecting the upper template (400) to the lower template (100) by adopting a connecting piece to carry out assembly and die assembly;
then the mould is put into a hot press to be cured according to a curing system;
step ten: demolding
The upper template (400) is disassembled by using a reverse jacking bolt; then the side pressure movable block assembly (300) is taken out; then the pressing block assembly (200) and the product are demolded from the lower die plate (100) by using the anti-jacking bolts;
removing connecting pieces on the pressing plate assembly (200), and sequentially taking out all parts on the pressing plate assembly (200);
at this time, the composite circumferential T-shaped reinforcing frame (500) can be manufactured.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502646.9A CN116423879A (en) | 2023-05-06 | 2023-05-06 | Forming die of composite material annular T-shaped reinforcing frame and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310502646.9A CN116423879A (en) | 2023-05-06 | 2023-05-06 | Forming die of composite material annular T-shaped reinforcing frame and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116423879A true CN116423879A (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310502646.9A Pending CN116423879A (en) | 2023-05-06 | 2023-05-06 | Forming die of composite material annular T-shaped reinforcing frame and preparation method thereof |
Country Status (1)
| Country | Link |
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| CN (1) | CN116423879A (en) |
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