A mold and method for forming a multi-faceted composite component

Abstract

A kind of multi-type surface composite material component mould, including multi-edge frame combination core mould, multi-edge frame outer mould, polyhedral outer mould, additional reinforcement plate forming area, polyhedral-column male die, stripper ring, column segment outer mould;A forming method of a kind of multi-type surface composite material component mould, comprising the following steps: S1: cleaning, assembly.S2: cutting out prepreg I, prepreg II, prepreg III, prepreg IV, prepreg V, prepreg VI;S3: layer 1S4: glue absorption compaction 1S5: assemblyS6: layer 2S7: glue absorption compaction 2S8: layer 3S9: overall curingS10: demoulding, cleaningThe present application realizes the overall forming of component, avoids the weight increase of component caused by screw or glue link of traditional multi-edge frame, polyhedron, column segment, the problem of low composite material bearing efficiency caused by discontinuous fiber, improves the production efficiency of component, reduces production cost.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of composite structure forming process, in particular to a multi-surface composite component mold and a forming method. BACKGROUND

[0002] Advanced composite materials have excellent specific strength, specific modulus, specific stiffness and designability, and the integrated forming technology of composite materials can not only greatly reduce the number of parts and fasteners, but also fully exert the high load-bearing advantage of composite materials. At present, the integrated forming technology of composite components is used in many fields and models abroad. SUMMARY

[0003] The purpose of the present application is to make up for the deficiencies of the composite structure joint, riveting and other connection methods, and based on this, the present application provides a plate-reinforced column-polyhedron-multiple frame integrated composite component mold design and forming process.

[0004] The technical scheme of the present application is as follows: a multi-surface composite component mold, comprising a multiple frame combined core mold, a multiple frame outer mold, a polyhedron outer mold, an external reinforcement plate forming area, a polyhedron-column male mold, a demolding ring, and a column segment outer mold.

[0005] The multiple frame combined core mold comprises a fixed lining plate, an edge core module, and an angle core module; the fixed lining plate is connected with the edge core module and the angle core module; the multiple frame combined core mold and the polyhedron-column male mold have the same distribution of Φ12.0 threaded holes, and the multiple frame combined core mold is connected with the polyhedron-column male mold through the Φ12 threaded holes; the demolding ring is connected through the Φ6.0 threaded holes uniformly distributed on the flange ring of the polyhedron-column male mold, the column segment outer mold is placed on the demolding ring, the column segment outer mold has a fixed groove on the outside, and the column segment outer mold is fixed in the column segment area of the polyhedron-column male mold at the position of the fixed groove; and the polyhedron outer mold is placed on the upper end of the column segment outer mold.

[0006] The multiple frame outer mold comprises an angle outer mold and an edge outer mold; the multiple frame outer mold is embedded between the polyhedron outer mold and the fixed lining plate.

[0007] The fixed lining plate is connected with the edge core module and the angle core module through the Φ8 threaded holes.

[0008] The column segment outer mold is fixed in the column segment area of the polyhedron-column male mold at the position of the fixed groove using a nylon rope.

[0009] A forming method of a multi-surface composite component mold, comprising the following steps:

[0010] S1: cleaning and assembling

[0011] The parts are cleaned, the fixed lining plate is connected and combined with the edge core module and the corner core module 14 through the Φ8 threaded holes to form a multi-edge frame combined core mold 1; the stripper ring is connected with the multi-polyhedral-column male die flange through the Φ6.0 threaded holes;

[0012] S2: cutting out prepreg I, prepreg II, prepreg III, prepreg IV, prepreg V, and prepreg VI;

[0013] S3: layer 1

[0014] The multi-edge frame combined core mold prepared in S1 is laid with the prepreg I cut in S2, and the multi-polyhedral-column male die is laid with the prepreg block V, the prepreg block II, and the prepreg block IV cut in step 2 in sequence;

[0015] S4: glue absorption and compaction 1

[0016] The multi-edge frame combined core mold and the multi-polyhedral-column male die laid in S3 and the surface prepreg are wrapped and vacuumized by using tetrafluoroethylene glass cloth, glue absorption material, non-porous film, air-permeable felt, and vacuum bag;

[0017] S5: assembly

[0018] The multi-edge frame combined core mold with the prepreg in S4 is placed on the upper end of the multi-polyhedral-column male die, and the two are connected through the Φ12 threaded holes by using an internal hexagonal screw, and no gap is allowed at the connection position; the connection position between the multi-edge frame combined core mold and the multi-polyhedral-column male die is supplemented with prepreg wire to achieve smooth transition, and the vacuum bag is wrapped and vacuumized for compaction;

[0019] S6: layer 2

[0020] The surface vacuum bag in S5 is cleaned, and the prepreg block III in S2 is laid on the surface of the prepreg after the assembly of the multi-edge frame combined core mold and the multi-polyhedral-column male die in S5 according to the requirements;

[0021] S7: glue absorption and compaction 2

[0022] The column segment outer female die and the polyhedral outer female die are placed on the surface of the prepreg in S6 in sequence, and the gap sizes of the column segment outer female die and the polyhedral outer female die are adjusted to be consistent, and the column segment outer female die is fixed at the fixed groove position; the column segment outer female die and the polyhedral outer female die are wrapped and vacuumized by using tetrafluoroethylene glass cloth, glue absorption material, non-porous film, air-permeable felt, and vacuum bag for glue absorption and compaction; after the glue absorption is completed, the wrapping materials are removed after the temperature of the multi-polyhedral-column male die decreases to room temperature;

[0023] S8: layer 3

[0024] S2: Put the prepreg block III in S2 on the surface of the prepreg in S7 according to requirements, and lay the prepreg III on the surface of the flange, column segment, polyhedron, and multi-frame combined core mold of the polyhedron-column male mold in sequence according to the flange edge reference of the polyhedron-column male mold;

[0025] S9: Overall curing

[0026] Place the tetrafluoroethylene glass cloth, glue absorbing material, and non-porous film on the surface of the prepreg in S8, cut them according to the above, assemble the column segment outer female mold, polyhedron outer female mold, and multi-frame outer female mold in sequence, and fix the column segment outer female mold in the fixing groove; use the air-permeable felt and vacuum bag for wrapping and vacuumizing, and complete the curing of the prepreg according to the following:

[0027] S10: Demolding and cleaning

[0028] When the temperature of the polyhedron-column male mold decreases to room temperature, remove the auxiliary materials; remove the screws at the Φ8.0 threaded holes, take out the fixed lining plate, and take out the edge core module and the corner core module one by one; remove the screws at the connection between the demolding ring and the polyhedron-column male mold, separate them, and obtain a multi-faceted composite material component.

[0029] In S1, use an organic solvent to clean each part

[0030] In S3, when laying the prepreg block IV, take the polyhedron / column segment joint of the polyhedron-column male mold as the reference, lay the prepreg IV in the polyhedron area of the polyhedron-column male mold with a decrease of 30 mm; use butt joint for 0° and 45°, and use lap joint for 90° with a lap joint amount of 80 mm; lay the prepreg V and the prepreg II according to the connection between the column segment and the polyhedron-column male mold; the multi-frame combined core mold and the polyhedron-column male mold are each laid with prepreg; and vacuumize and compact every other layer during the laying process.

[0031] In S4, place the wrapped prepreg in the charging truck, and the glue absorbing and compacting temperature is 75-80°C, the heat preservation time is 1.0 h, the pressure of the autoclave is 0.3±0.02 MPa; after the glue absorbing is completed, remove the wrapping materials after the temperature of the polyhedron-column male mold decreases to room temperature.

[0032] In S5, the vacuum degree is -0.1 MPa, and the vacuumizing time is 30 min.

[0033] In the S6, the flange edge reference of the polyhedral-column male die 5 is used as the basis for laying the prepreg III 22 on the surface of the polyhedral-column male die in turn, including the flange, the column segment, the polyhedron and the multi-frame combined core die; 0° and 45° are connected in a butt joint manner, 90° is connected in an overlapping manner, and the overlapping amount is 80 mm; the 90° material overlapping position of the polyhedral part of the polyhedral-column male die avoids the corner; a total of 15 layers of prepreg are laid in the outer reinforcing plate forming area.

[0034] In the S7, the glue absorption and compaction temperature is 75-80 DEG C, and the temperature is kept for 1.0 h.

[0035] In the S9, the curing forming process is as follows: the pressure is required to be 30 min before heating, the air tightness of the coating is -0.1 MPa, and the temperature is raised after meeting the requirement; the heating rate is 25-28 DEG C / h, and the rate in the later stage of heating is 15-20 DEG C / h; the temperature is kept for 4 h when the temperature is raised to 180-185 DEG C.

[0036] In the S10, the edge core module and the corner core module are taken out one by one by using a pin puller, and ultrasonic flaw detection is performed.

[0037] The significant effect of the present application is that:

[0038] (1) The overall forming of the component is realized, the weight increase of the parts caused by the traditional multi-frame, polyhedron and column segment through screw or glue connection is avoided, the problem of low bearing efficiency of the composite material caused by the discontinuous fiber is avoided, the production efficiency of the component is improved, and the production cost is reduced.

[0039] (2) The present application uses the method of increasing the inner plate rib to enhance the load concentration point of the component, reduces the product failure risk caused by stress concentration of the product, and improves the service life of the product.

[0040] (3) In view of the problem that the size of the ring-shaped inner side plate rib is large and the internal quality is difficult to control, the present application adopts the bolt pressing mode, solves the problem of transmission and attenuation of the pressure in the autoclave in the combined die, improves the forming quality of the ring-shaped inner side plate rib, and the total defect ratio of ultrasonic flaw detection is ≤2.0%.

[0041] (4) The present application adopts the twice glue absorption process of local glue absorption and overall glue absorption, reduces the volatile matter or small molecule substance in the prepreg, and improves the compactness between the prepregs. The defects of the product after ultrasonic flaw detection are as follows: the delamination defect is ≤1.0%, the loose inclusion is ≤2.0%, Z is ≤40.0 mm; the distance from the edge or opening is greater than 100 mm, Z is ≤60 mm; the spacing of the delamination defect with Z≥30 mm is ≥100.0 mm.

[0042] (5) By the appearance of the pre-preg after the glue, reduce the pre-preg surface wrinkles and protrusions, effectively improve the appearance of the cured product, reduce the subsequent surface of the grinding process.

[0043] (6) By the core mold and stripper ring ejection two kinds of demolding way combination, solve the complex surface composite components demolding difficult problem, shorten the 20 ~ 40% of the demolding time. BRIEF DESCRIPTION OF DRAWINGS

[0044] Figure 1 is the column-polyhedral core mold overall schematic diagram:

[0045] Figure 2 is the multi-frame combined core mold schematic diagram:

[0046] Figure 3 is the multi-frame outer mold schematic diagram:

[0047] Figure 4 is the polyhedral outer mold schematic diagram:

[0048] Figure 5 is the column segment outer mold schematic diagram:

[0049] Figure 6 is the fixed lining plate schematic diagram:

[0050] Figure 7 is the corner core module schematic diagram:

[0051] Figure 8 is the corner mold edge mold assembly schematic diagram:

[0052] Figure 9 is the pre-preg I schematic diagram:

[0053] Figure 10 is the pre-preg II schematic diagram:

[0054] Figure 11 is the pre-preg III schematic diagram:

[0055] Figure 12 is the pre-preg IV schematic diagram:

[0056] Figure 13 is the pre-preg V schematic diagram:

[0057] Figure 14 is the pre-preg VI schematic diagram:

[0058] Figure: 1 is a multi-frame combined core mold, 2 is a multi-frame outer negative mold, 3 is a polyhedral outer negative mold, 4 is an outer reinforcing plate forming area, 5 is a polyhedral-column positive mold, 6 is a demolding ring, 7 is a column segment outer negative mold, 8 is a Φ12.0 threaded hole, 9 is a Φ8.0 threaded hole, 10 is a fixed groove, 11 is a Φ6.0 threaded hole, 12 is a fixed lining plate, 13 is a side core module, 14 is an angle core module, 15 is an angle negative mold, 16 is a side negative mold, 21 is a pre-impregnated material I, 22 is a pre-impregnated material II, 23 is a pre-impregnated material III, 24 is a pre-impregnated material IV, 25 is a pre-impregnated material V, 26 is a pre-impregnated material VI DETAILED DESCRIPTION

[0059] A multi-faceted composite component mold, comprising a multi-frame combined core mold 1, a multi-frame outer negative mold 2, a polyhedral outer negative mold 3, an outer reinforcing plate forming area 4, a polyhedral-column positive mold 5, a demolding ring 6, and a column segment outer negative mold 7.

[0060] The multi-frame combined core mold 1 comprises a fixed lining plate 12, a side core module 13, and an angle core module 14; the fixed lining plate 12 is connected to the side core module 13 and the angle core module 14 through the Φ8 threaded hole 9; the multi-frame combined core mold 1 and the polyhedral-column positive mold 5 have the same distribution of Φ12.0 threaded holes 8, and the multi-frame combined core mold 1 is connected to the polyhedral-column positive mold 5 through the Φ12 threaded holes 8; the demolding ring 6 is connected through the Φ6.0 threaded holes 11 evenly distributed with the flanging ring of the polyhedral-column positive mold 5, the column segment outer negative mold 7 is placed on the demolding ring 6, the column segment outer negative mold 7 has a fixed groove 10 on the outside, and the column segment outer negative mold 7 is fixed in the column segment area of the polyhedral-column positive mold 5 using nylon rope at the position of the fixed groove 10, and the polyhedral outer negative mold 3 is placed at the upper end of the column segment outer negative mold 7.

[0061] The multi-frame outer negative mold 2 comprises an angle negative mold 15 and a side negative mold 16. The multi-frame outer negative mold 2 is embedded between the polyhedral outer negative mold 3 and the fixed lining plate 12.

[0062] The above-mentioned molds are all made of aluminum.

[0063] The pre-impregnated material block I 21 is a rectangular material, the length of the rectangular material is the circumference of the multi-frame, and the width of the rectangular material is the sum of the height of the multi-frame and the width of the annular inner plate rib;

[0064] The pre-impregnated material block II 22 is a rectangular material + a sector material, wherein the length of the rectangular material is 1 / 4 of the circumference of the outer flange, the width of the rectangular part is the sum of the column segment height and the outer flange width; the maximum arc length of the sector material is consistent with the arc length of the arc material, and the chord length of the sector material is the length of one side of the multi-frame;

[0065] Prepreg block III 23 is rectangular material (lower) + fan-shaped material + rectangular material (upper), wherein the length of the rectangular material (lower) is 1 / 4 of the circumference of the turned-up edge, the width of the rectangular part is the sum of the height of the column segment and the width of the turned-up edge; the maximum arc length of the fan-shaped material is consistent with the length of the rectangular material, and the chord length of the fan-shaped material is the length of a single side of the multi-frame; the length of the multi-frame material is the length of a single side of the multi-frame, and the width of the rectangular material (upper) is consistent with the height of the multi-frame;

[0066] Prepreg block IV 24 is arc-shaped material, the length of the arc-shaped material is consistent with the circumference of the column segment, and a total of 8 specifications of material; the maximum width is consistent with the maximum generatrix length of the polyhedron, and the width decreases by 30 mm between different specifications in turn;

[0067] Prepreg block V 25 is arc-shaped material, the length of the arc-shaped material is consistent with the circumference of the turned-up edge, and the width is consistent with the width of the turned-up edge;

[0068] Prepreg block VI 26 is a rectangle, the length of the rectangular material is consistent with the length of the outer reinforcing plate, and the width of the rectangular material is consistent with the width of the outer reinforcing rib;

[0069] Prepreg block I 21 and prepreg block VI 26 are 0° and 45° prepreg cutting methods; prepreg block II 22, prepreg block III 23, and prepreg block IV 24 are 0°, 45°, and 90° prepreg cutting methods; and prepreg block V 25 is a woven cloth cutting method. The fan-shaped part in the prepreg block II 22 and the prepreg block III 23 is obtained when the main arc surface of the polyhedron is developed into a plane;

[0070] A method for forming a multi-faceted composite material component, comprising the following steps:

[0071] (1) Cleaning and assembling

[0072] Each part is cleaned using an organic solvent, and the fixed lining plate 12 is connected and combined with the edge core module 13 and the corner core module 14 into a multi-frame combined core 1 through the Φ8 threaded hole 9; the demolding ring 6 is connected together through the Φ6.0 threaded hole 11 of the turned-up edge of the polyhedron-column male die 5.

[0073] (2) Prepreg cutting

[0074] Prepreg I 21, prepreg II 22, prepreg III 23, prepreg IV 24, prepreg V 25, and prepreg VI 26 are cut out;

[0075] (3) Laying 1

[0076] The surface of the multi-frame combined core mold 1 prepared in step (1) is laid with the pre-preg I cut in step 2, and the pre-preg blocks V25, pre-preg blocks II 22, and pre-preg blocks IV 24 cut in step 2 are laid in sequence on the polyhedral-column male mold 5. When the pre-preg blocks IV 24 are laid, the polyhedral / column segment junctions of the polyhedral-column male mold 5 are taken as the reference, and the pre-preg IV 24 is laid on the polyhedral area of the polyhedral-column male mold 5 with a gradual decrease of 30 mm. The 0°, 45°, and 90° pre-pregs are laid in butt joint, overlap joint, and lap joint, respectively, and the overlap amount is controlled to be 80 mm. The pre-preg V25 and the pre-preg II 22 are laid with the column segment of the polyhedral-column male mold 5 and the folded edge connection of the polyhedral-column male mold 5 as the reference. The multi-frame combined core mold 1 and the polyhedral-column male mold 5 each have 17 layers of pre-pregs. During the laying process, vacuumizing and compaction are performed every 7 layers.

[0077] (4) Suction compaction 1

[0078] The multi-frame combined core mold 1 and the polyhedral-column male mold 5 after the laying in step (3) and the surface pre-preg are wrapped and vacuumized by using tetrafluoroethylene glass cloth, suction material, non-porous film, air-permeable felt, and vacuum bag. The wrapped pre-preg is placed in a charging truck, and suction compaction is performed at a temperature of 75-80°C for 1.0 h. The pressure of the autoclave is 0.3±0.02 MPa. After the suction compaction is completed, the wrapped material is removed after the temperature of the polyhedral-column male mold 5 decreases to room temperature.

[0079] (5) Assembly

[0080] The multi-frame combined core mold 1 with the pre-preg in step (4) is placed on the upper end of the polyhedral-column male mold 5. The two are connected by using an internal hexagonal screw through the Φ12 threaded hole 8, and no gap is allowed at the connection. The connection between the multi-frame combined core mold 1 and the polyhedral-column male mold 5 is supplemented with pre-preg filaments to a smooth transition, and the vacuum bag is used for wrapping and vacuumizing and compaction. The vacuum degree is -0.1 MPa, and the vacuumizing time is 30 min.

[0081] (6) Laying 2

[0082] The vacuum bag on the surface of step (5) is cleaned, and the pre-preg block III 23 in step (2) is laid on the surface of the pre-preg after the assembly of the multi-frame combined core mold 1 and the polyhedral-column male mold 5 in step (5) according to the requirements. The pre-preg III 22 is laid on the folded edge, column segment, polyhedron, and surface of the multi-frame combined core mold 1 of the polyhedral-column male mold 5 in sequence with the folded edge edge of the polyhedral-column male mold 5 as the reference. The 0°, 45°, and 90° pre-pregs are laid in butt joint, overlap joint, and lap joint, respectively, and the overlap amount is controlled to be 80 mm. The 90° pre-preg on the polyhedral part of the polyhedral-column male mold 5 avoids the corner. Laying 2 is completed for a total of 15 layers. The pre-preg VI 26 is laid in the outer reinforcing plate forming area 4, and the number of layers is 25.

[0083] (7) Suction compaction 2

[0084] The column segment outer negative mold 7 and the polyhedral outer negative mold 3 are placed on the surface of the prepreg of step (6) in sequence, and the gap sizes at different positions of the column segment outer negative mold 7 and the polyhedral outer negative mold 3 are adjusted to be uniform, and the column segment outer negative mold 7 is fixed by using nylon ropes at the fixed groove 10 position; the tetrafluoroethylene glass cloth, the suction material, the non-porous film, the air-permeable felt and the vacuum bag are used for wrapping and vacuumizing, and they are placed in the charging car and pushed into the autoclave for suction compaction; the suction compaction temperature is 75-80℃, the heat preservation time is 1.0h, and the pressure of the autoclave is 0.3±0.02MPa; after the suction compaction is completed, the wrapping materials are removed after the temperature of the polyhedral-column male mold 5 decreases to room temperature;

[0085] (8) Laying 3

[0086] The prepreg block III 23 of step (2) is laid on the surface of the prepreg of step (7) according to requirements, and the prepreg III 23 is laid on the surface of the polyhedral-column male mold 5 in sequence in the order of the flange, the column segment, the polyhedron and the multi-edged frame combined core mold 1 according to the flange edge reference of the polyhedral-column male mold 5 during the laying;

[0087] (9) Overall curing

[0088] The tetrafluoroethylene glass cloth, the suction material and the non-porous film are placed on the surface of the prepreg of step (8), the column segment outer negative mold 7, the polyhedral outer negative mold 3 and the multi-edged frame outer negative mold 2 are assembled in sequence after being cut, and the column segment outer negative mold 7 is fixed by using nylon ropes at the fixed groove 10 position; the air-permeable felt and the vacuum bag are used for wrapping and vacuumizing, and they are placed in the charging car, and the following curing forming process is used: the pressure is required to be reduced to the required value for 30min before heating, the air tightness of the wrapping is -0.1MPa, and the temperature is increased after the requirements are met; the heating rate is 25-28℃ / h, and the rate is allowed to be 15-20℃ / h in the later stage of heating; the temperature is increased to 180-185℃, and the temperature is kept for 4h to complete the curing of the prepreg.

[0089] (10) Demolding and cleaning

[0090] When the temperature of the polyhedral-column male mold 5 decreases to room temperature, the auxiliary materials are removed; the fixed lining plate 12 is removed after the screws at the Φ8.0 threaded holes 9 are removed, and the edge core module 13 and the corner core module 14 are taken out one by one by using the pin puller; the polyhedral-column male mold 5 is separated from the demolding ring 6 by removing the screws at the connection position of the polyhedral-column male mold 5 and the demolding ring 6 and using a spatula, and a multi-faceted composite component is obtained. After ultrasonic flaw detection, the multi-faceted composite component has no defects in the annular inner plate rib, no delamination defects are found, the porosity and inclusion defects are 0.30%, and the high-quality forming of the multi-faceted composite component is realized.

Claims

1. A method for forming a multi-surface composite material component, the mold involved comprising a multi-frame combined core mold (1), a multi-frame outer female mold (2), a polyhedron outer female mold (3), an outer reinforcement plate forming area (4), a polyhedron-column male mold (5), a demoulding ring (6), and a column segment outer female mold (7); The multi-frame combined core mold (1) comprises a fixed lining plate (12), a side core module (13), and a corner core module (14); the fixed lining plate (12) and the side core module (13), the corner core module (14) The multi-frame combined core mold (1) and the polyhedron-column positive mold (5) have the same distribution of Φ12.0 threaded holes (8), and the multi-frame combined core mold (1) and the polyhedron-column positive mold (5) are connected through the Φ12 threaded holes (8); the demoulding ring (6) is connected to the polyhedron-column positive mold (5) through the Φ6.0 threaded holes (11) uniformly distributed in the circumferential direction of the flanging, and the column segment outer female mold (7) is placed on the demoulding ring (6). The column segment outer female mold (7) has a fixing groove (10) on the outside. A nylon rope is used to fix the column segment outer female mold (7) to the column segment area of ​​the polyhedron-column positive mold (5) at the position of the fixing groove (10), and the polyhedron outer female mold (3) is placed on the upper end of the column segment outer female mold (7); The multi-frame outer female mold (2) comprises a corner female mold (15) and a side female mold (16); the multi-frame outer female mold (2) is embedded between the polyhedral outer female mold (3) and the fixed lining plate (12); Its characteristics are: The following steps are involved: S1: Cleaning and assembly Clean all parts, connect the fixed lining plate (12) with the edge core module (13) and the corner core module (14) through the Φ8 threaded hole (9) to form a multi-frame combined core mold (1); the demoulding ring (6) is connected to the Φ6.0 threaded hole (11) of the polyhedron-column male mold (5) through the flange; S2: cutting out prepreg I (21), prepreg II (22), prepreg III (23), prepreg IV (24), prepreg V (25), and prepreg VI (26); S3: Layer 1 The prepreg I (21) cut in step 2 is laid on the surface of the multi-frame composite core mold (1) prepared in S1, and the prepreg V (25), prepreg II (22), and prepreg IV (24) cut in step S2 are laid in sequence on the polyhedron-column positive mold (5); S4: Glue suction and compaction 1 The multi-frame combined core mold (1), the polyhedron-column positive mold (5) and the surface prepreg after the layers in S3 are coated and vacuumed using tetrafluoroethylene glass cloth, adhesive absorbing material, non-porous membrane, breathable felt and vacuum bag; S5: Assembly The multi-frame combined core mold (1) with prepreg in S4 is placed on the upper end of the polyhedron-column male mold (5), and connected through the Φ12 threaded hole (8) using hexagon socket screws, and no gap is allowed at the connection between the two; the connection between the multi-frame combined core mold (1) and the polyhedron-column male mold (5) is filled with prepreg yarn to achieve a smooth transition, and a vacuum bag is used for coating, vacuuming and compacting; S6: Layer 2 Clean the vacuum bag on the surface of S5, take the prepreg III (23) in S2 and lay it on the prepreg surface after the multi-frame combined core mold (1) and the polyhedron-column positive mold (5) in S5 are assembled according to the requirements; S7: Glue suction and compaction 2 The column segment outer female mold (7) and the polyhedron outer female mold (3) are sequentially placed on the surface of the prepreg in S6, and the gap sizes at each location of the column segment outer female mold (7) and the polyhedron outer female mold (3) are adjusted to be consistent, and the column segment outer female mold (7) is fixed at the position of the fixing groove (10); tetrafluoroethylene glass cloth, glue absorbing material, non-porous membrane, breathable felt, and vacuum bag are used for coating, vacuuming, and glue absorbing and compacting; after the glue absorbing is completed, the coating material is removed after the temperature of the polyhedron-column male mold (5) drops to room temperature; S8: Layer 3 Take the prepreg III (23) in S2 and lay it on the surface of the prepreg in S7 as required. When laying the layers, use the flange edge of the polyhedron-column male mold (5) as a reference and lay the prepreg III (23) on the flange, column section, polyhedron, and multi-frame combined core mold (1) of the polyhedron-column male mold (5) in sequence; S9: Overall curing Place tetrafluoroethylene glass cloth, adhesive-absorbing material, and non-porous membrane on the surface of the prepreg in S8, assemble the column segment outer female mold (7), the polyhedron outer female mold (3), and the multi-frame outer female mold (2) in sequence, and fix the column segment outer female mold (7) in the fixing groove (10); use breathable felt and vacuum bag to cover and evacuate, and complete the curing of the prepreg as follows; S10: Demolding and cleaning When the temperature of the polyhedron-column positive mold (5) drops to room temperature, the auxiliary materials are removed; after removing the screws at the Φ8.0 threaded hole (9), the fixed lining plate (12) is removed, and the side core module (13) and the corner core module (14) are taken out one by one; after removing the screws at the connection between the demoulding ring (6) and the polyhedron-column positive mold (5), the two are separated to obtain a multi-surface composite material component.

2. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In the above-mentioned S1, each part is cleaned using an organic solvent.

3. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In said S3, when laying the prepreg IV (24), the intersection of the polyhedron / column section of the polyhedron-column positive mold (5) is used as a reference, and the prepreg IV (24) is laid in the polyhedron area of ​​the polyhedron-column positive mold (5) by decreasing by 30 mm; 0° and 45° are butt-jointed, and 90° is overlapped, with an overlap amount of 80 mm; when laying the prepreg V (25) and prepreg II (22), the column section of the polyhedron-column positive mold (5) and the flange connection of the polyhedron-column positive mold (5) are used as a reference; wherein the multi-frame combined core mold (1) and the polyhedron-column positive mold (5) are laid with 17 layers of material respectively; during the laying process, vacuum compaction is performed every 7 layers.

4. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In said S4, the coated prepreg is placed in a tanker, the glue suction and compaction temperature is 75-80°C, and the temperature is kept for 1.0h; after the glue suction is completed, the temperature of the polyhedron-column positive mold (5) is lowered to room temperature and then the coating material is removed.

5. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In the S5, the vacuum degree is -0.1 MPa, and the vacuum is drawn for 30 minutes.

6. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In said S6, when laying the layers, the flange edge of the polyhedron-column male mold (5) is used as a reference, and the prepreg III (23) is laid on the flange, column section, polyhedron, and multi-frame combined core mold (1) of the polyhedron-column male mold (5) in sequence; wherein 0° and 45° are butt-jointed, and 90° is overlapped, with an overlap amount of 80 mm; the 90° overlap position of the polyhedron part of the polyhedron-column male mold (5) avoids the corner; a total of 15 layers of layer 2 are completed; and prepreg VI (26) is laid in the outer reinforcement plate forming area (4), with the number of layers being 25.

7. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In the above-mentioned S7, the temperature of the glue suction and compaction is 75-80° C., and the temperature is kept for 1.0 h.

8. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In the S9, the curing molding process is as follows: before heating, the pressure is pressed to the required value for 30 minutes, the air tightness of the coating is -0.1MPa, and the temperature is raised after meeting the requirements; the heating rate is 25~28℃ / h, and the heating rate in the later stage is 15~20℃ / h; when the temperature reaches 180~185℃, it is kept warm for 4h.

9. The method for forming a multi-surface composite material component according to claim 1, characterized in that: In the above-mentioned S10, the side core modules (13) and the corner core modules (14) are taken out one by one using a pin puller, and ultrasonic flaw detection is performed.

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