CN110481058B - Method for forming light cable cover embedded in winding shell - Google Patents
Method for forming light cable cover embedded in winding shell Download PDFInfo
- Publication number
- CN110481058B CN110481058B CN201910892417.6A CN201910892417A CN110481058B CN 110481058 B CN110481058 B CN 110481058B CN 201910892417 A CN201910892417 A CN 201910892417A CN 110481058 B CN110481058 B CN 110481058B
- Authority
- CN
- China
- Prior art keywords
- cable cover
- layer
- layers
- fiber
- laying
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/16—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length
- B29C70/22—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure
- B29C70/228—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of substantial or continuous length oriented in at least two directions forming a two dimensional structure the structure being stacked in parallel layers with fibres of adjacent layers crossing at substantial angles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/70—Completely encapsulating inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/20—Inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
- B29L2031/3097—Cosmonautical vehicles; Rockets
Abstract
The invention discloses a method for forming a light cable cover embedded in a winding shell, which comprises the steps of mechanically adding a light foam material, calculating the number of layers of lower layers and upper layers, cutting a fiber prepreg according to the section size and the length size of the cable cover, paving lower structural layer layers according to the alternate sequence of the fiber direction of the fiber prepreg to the required number of layers, bonding the light foam layer to the corresponding positions at two ends of the cable cover, paving upper structural layer layers according to the alternate sequence of the fiber direction of the fiber prepreg, paving to the required number of layers to form a cable cover prefabricated part, and curing. Compared with the traditional aluminum alloy cable cover, the cable cover adopts a structure of fiber prepreg paving layers and foam sandwich, so that the passive quality of the cable cover is greatly reduced on the premise of ensuring that the structural strength of the cable cover meets the use requirement; the method of laying the fiber prepreg is simple and flexible to operate, high in process feasibility and strong in practicability, net-size forming of products is achieved, and processing cost is reduced.
Description
Technical Field
The invention relates to the technical field of solid rocket engine shell forming, in particular to a method for forming a light cable cover embedded in a winding shell.
Background
When the solid rocket engine works, the electric interfaces and the information transmission channels are provided for the connection of all components in the missile through the cables, and the missile is protected through the cable cover to ensure that the cables can work reliably due to the high flying speed and the harsh working environment of the missile. The traditional fiber winding engine shell is usually made of aluminum alloy materials, and then is installed on the surface of the shell through a cable cover support embedded in the shell.
In recent years, a new technology of embedding fibers in a cable cover into an engine shell is developed in the technical field of solid rocket engine shell forming, the technology enables a solid rocket engine to have a better pneumatic appearance, the cable cover is fixed and reliable, and an outer heat-proof layer on the surface of the shell can be wound by the fibers to provide heat-proof and anti-scouring functions for the fiber wound shell and a cable simultaneously. According to the technical scheme, the cable cover is usually made of the carbon fiber composite material or the glass fiber composite material, although the density of the cable cover is lower than that of the traditional aluminum alloy material, the cable cover still has certain mass, and the passive mass needs to be further reduced in consideration of the importance of reducing the passive mass on the improvement of the carrying capacity and the range of the solid rocket engine.
Disclosure of Invention
The invention aims to provide a method for forming a light cable cover embedded in a winding shell with low passive quality aiming at the defects of the technology.
In order to achieve the purpose, the invention provides a method for forming a light cable cover embedded in a winding shell, wherein the section of the cable cover comprises a structural layer and two sandwich layers, the structural layer comprises an upper structural layer and two lower structural layers symmetrically arranged at two ends of the upper structural layer, the outer surface of each lower structural layer and the inner surface of the end part of the upper structural layer enclose to form a closed cavity for mounting the sandwich layers, a hollow area is formed between the area between the two lower structural layers and the inner surface of the upper structural layer, and the cambered surface radius of the inner molded surfaces of the two lower structural layers is the same as the outer diameter of the winding shell; the cable cover forming method specifically comprises the following steps:
1) machining the light foam material, wherein the transverse section of the machined light foam layer has the same size as the structural size of the sandwich layer;
2) calculating the number of layers of the lower laying layer according to the thickness of the lower structural layer and the thickness of the single-layer fiber prepreg, calculating the number of layers of the upper laying layer according to the thickness of the upper structural layer and the thickness of the single-layer fiber prepreg, and then cutting the fiber prepreg according to the section size of the cable cover and the length size of the cable cover;
3) coating a release agent on the surface of a cable cover laying mold, then laying a lower structural layer according to the sequence of the fiber direction of the fiber prepreg which is 0 degrees and 90 degrees alternately, and laying to the required number of layers;
4) coating an adhesive on the surface of the mechanically-added light foam layer, and then bonding the light foam layer to the corresponding positions at the two ends of the cable cover;
5) laying up structural layers according to the alternate sequence of 0 degrees and 90 degrees in the fiber direction of the fiber prepreg, and laying to the required number of layers to form a cable cover prefabricated part;
6) laying a layer of polytetrafluoroethylene demolding cloth on the surface of the cable cover prefabricated part, wherein the demolding cloth is smooth and free of wrinkles, then laying a layer of breathable felt, putting a vacuum bag, pressurizing by adopting a vacuumizing mode, and putting the cable cover prefabricated part into a drying oven for heating and curing molding; the curing system is performed in accordance with the curing system of the fiber prepreg employed.
Further, in the step 1), the longitudinal length of the sandwich layer is 200-300 mm, and the number of the light foam layers is equal to the length of the cable cover/the length of the machined light foam layer multiplied by 2; when the calculated number of the light foam layers contains a decimal, the number of the light foam layers is one plus one minus the decimal.
Further, in the step 2), the cable cover is alternately layered according to the sequence of 0 degrees and 90 degrees in the fiber direction of the fiber prepreg, so that cutting is needed according to the fiber direction of the fiber prepreg during blanking; when the cable cover length is longer, be convenient for fibre prepreg to tailor and spread the layer operation, each layer of fibre prepreg divide into the multistage and tailors, guarantees total length, and when the follow-up operation of spreading the layer, the fibre prepreg concatenation seam of 0 orientation need stagger.
Further, in the step 4), an epoxy resin adhesive is used as the adhesive.
Furthermore, the cable cover paving mould is manufactured according to the size of the inner profile of the cable cover and the length of the cable cover, and the cable cover paving mould is made of metal.
Further, the sandwich layer is made of light foam materials, and the light foam materials are PMI foams.
Furthermore, the upper structural layer and the lower structural layer are both formed by multiple layers of fiber prepregs, and the fiber prepregs are carbon fiber reinforced epoxy resin prepregs or glass fiber reinforced epoxy resin prepregs.
Compared with the prior art, the invention has the following advantages:
1) compared with the traditional aluminum alloy cable cover, the cable cover adopts a structure of fiber prepreg paving layers and foam sandwich, so that the passive quality of the cable cover is greatly reduced on the premise of ensuring that the structural strength of the cable cover meets the use requirement; the method of laying the fiber prepreg is simple and flexible to operate, high in process feasibility and strong in practicability, net size of the product is formed, and processing cost is reduced;
2) the method of vacuum bag pressurization and oven heating solidification is adopted for pressurization and solidification molding, compared with the method of mould pressing, the cable cover laying mould does not need to manufacture a female mould, only needs to process a male mould, is simple in mould design and processing, is low in cost, and does not need to rely on large-scale pressure equipment.
Drawings
Fig. 1 is a schematic cross-sectional view of a cable cover according to the present invention.
Wherein: the structure comprises an inner molded surface 1, an outer molded surface 2, a sandwich layer 3, a structural layer 4 (wherein, a lower structural layer 4a and an upper structural layer 4b), a hollow area 5 and a closed cavity 6.
Detailed Description
The invention is described in further detail below with reference to the figures and the specific embodiments.
A light cable cover forming method embedded in a winding shell is characterized in that the cross section of the cable cover comprises a structural layer 4 and two sandwich layers 3, wherein the structural layer 4 comprises an upper structural layer 4b and two lower structural layers 4a which are symmetrically arranged at two ends of the upper structural layer 4b, the outer surface of each lower structural layer 4a and the inner surface of the end part of the upper structural layer 4b enclose to form a closed cavity 6 for installing the sandwich layers 3, and a hollow area 5 is formed between the area of the two lower structural layers 4a and the inner surface of the upper structural layer 4 b; in addition, the cambered surface radius of the inner profile 1 of the two lower structural layers 4a is the same as the outer diameter of the winding shell, and after the cable cover is installed on the winding shell, the outer profile 2 of the upper structural layer 4b is in smooth transition with the winding shell, so that the cable cover and the outer winding layer of the cable cover are prevented from being overhead. In this embodiment, the sandwich layer 3 is a weight-reducing structure, and is made of a light foam material, which is PMI foam; the upper structural layer 4b and the lower structural layer 4a are both formed by multiple layers of fiber prepregs, and the fiber prepregs are carbon fiber reinforced epoxy resin prepregs or glass fiber reinforced epoxy resin prepregs. The cable cover forming method specifically comprises the following steps:
1) manufacturing a cable cover laying mold according to the size of the inner profile of the cable cover and the length of the cable cover, wherein the cable cover laying mold is made of metal;
2) machining the light foam material, wherein the transverse section of the machined light foam layer is the same as the structural size of the sandwich layer 3, the longitudinal length of the sandwich layer 3 is 200-300 mm, and the number of the light foam layers is equal to the length of the cable cover/the length of the machined light foam layer multiplied by 2; when the calculated number of the light foam layers contains decimal, the number of the light foam layers is increased by one after the decimal is removed;
3) calculating the number of layers of a lower laying layer according to the thickness of the lower structural layer 4a and the thickness of the single-layer fiber prepreg, calculating the number of layers of an upper laying layer according to the thickness of the upper structural layer 4b and the thickness of the single-layer fiber prepreg, cutting the fiber prepreg according to the cross-sectional dimension of the cable cover and the length dimension of the cable cover, and cutting the fiber prepreg according to the fiber direction of the fiber prepreg because the cable cover is alternately laid according to the sequence of 0 degrees and 90 degrees in the fiber direction of the fiber prepreg; when the length of the cable cover is long, each layer of fiber prepreg is divided into multiple sections for cutting and paving operation, and the total length is ensured;
4) coating a release agent on the surface of a cable cover laying mold, then laying a lower structural layer according to the sequence of the fiber direction of the fiber prepreg which is 0 degrees and 90 degrees alternately, and laying to the required number of layers;
5) coating an adhesive on the surface of the mechanically-added light foam layer, and then bonding the light foam layer to the corresponding positions at the two ends of the cable cover, wherein the adhesive is an epoxy resin adhesive;
6) laying up structural layers according to the alternate sequence of 0 degrees and 90 degrees in the fiber direction of the fiber prepreg, and laying to the required number of layers to form a cable cover prefabricated part;
7) laying a layer of polytetrafluoroethylene demolding cloth on the surface of the cable cover prefabricated part, wherein the demolding cloth is required to be smooth and wrinkle-free, then laying a layer of breathable felt, putting a vacuum bag, pressurizing by adopting a vacuumizing mode, and putting the cable cover prefabricated part into a drying oven for heating and curing molding; the curing system is executed according to the curing system of the adopted fiber prepreg;
8) and after the solidification is finished, taking the cable cover prefabricated part out of the cable cover paving mould, and polishing and finishing surface burrs to obtain a cable cover product.
Compared with the traditional aluminum alloy cable cover, the cable cover adopts a structure of fiber prepreg paving layers and foam sandwich, so that the passive quality of the cable cover is greatly reduced on the premise of ensuring that the structural strength of the cable cover meets the use requirement; the method of laying the fiber prepreg is simple and flexible to operate, high in process feasibility and strong in practicability, net size of the product is formed, and processing cost is reduced; in addition, the method of vacuum bag pressurization and oven heating solidification is adopted for pressurization and solidification molding, compared with the method of mould pressing, the cable cover laying mould does not need to manufacture a female mould, only needs to process a male mould, is simple in mould design and processing, is low in cost, and does not need to rely on large-scale pressure equipment.
Example 1
The structural parameters of the light cable shield embedded in the winding shell in a certain model are shown in table 1:
TABLE 1
| Serial number | Item | Structural parameters | |
| 1 | Radius of inner profile arc surface | 600mm | |
| 2 | Width of cavity in hollow area | 150mm | |
| 3 | Cavity height of hollow area | 8mm | |
| 4 | Width of | 300mm | |
| 5 | Cable cover length | 1535mm | |
| 6 | Thickness of lower structural layer of foam | 1.5mm | |
| 7 | Thickness of upper structural layer of foam | 1.5mm |
The forming method of the light cable cover comprises the following steps:
1) and manufacturing a cable cover paving mould according to the structural size of the inner profile of the cable cover and the length size of the cable cover, wherein the cable cover paving mould is processed by adopting Q235 structural steel.
2) The PMI foam is subjected to machining, the transverse section of the machined PMI foam layer is the same as the structural size of the cable cover sandwich layer, and the longitudinal length of the sandwich layer is 250mm, namely the number of the PMI foam layers is (1535/250). times.2, 12.28 and 13.
3) The cable cover adopts carbon fiber reinforced modified epoxy resin prepreg with the thickness of 0.3mm, the number of layers of a lower laying layer is 1.5/0.3-5, the number of layers of an upper laying layer is 1.5/0.3-5, and the fiber prepreg is cut according to the section size of the cable cover and the length size of the cable cover, and the cable cover is specifically as follows:
blanking size and number of lower fiber prepreg: 3 pieces of 320mm × 1535mm size prepreg and 2 pieces of 1535mm × 320mm size prepreg;
feeding size and quantity of the upper fiber prepreg: 2 sheets of prepreg of 305mm × 1535mm size and 3 sheets of prepreg of 1535mm × 305mm size;
the blanking sizes are the size parallel to the fiber direction of the fiber prepreg and the size vertical to the fiber direction of the fiber prepreg;
due to the limitation of the width of the fiber prepreg, the 1535mm size can be divided into 3 sections for cutting in order to facilitate the subsequent manual laying operation, and the total length is ensured to be not less than 1535 mm.
4) Coating a release agent on the surface of a cable cover laying mold, then laying a foam lower structure layer according to the sequence of fiber prepreg fiber directions of 90 degrees, 0 degrees, 90 degrees, 0 degrees and 90 degrees, and laying 5 layers in total, wherein the 90-degree laying layer adopts the prepreg with the size of 320mm multiplied by 1535mm, the 0-degree laying layer adopts the prepreg with the size of 1535mm multiplied by 320mm, and splicing seams of the second layer of 0-degree laying layer and the fourth layer of 0-degree laying layer are required to be staggered;
5) coating an epoxy resin adhesive on the surface of the mechanically-added PMI foam layer, and then bonding the PMI foam layer to the corresponding position of the cable cover;
6) laying structural layers on the foam according to the sequence of 0 degree, 90 degree, 0 degree, 90 degree and 0 degree in the fiber direction of the fiber prepreg, laying 5 layers in total, wherein the 90 degree laying adopts the prepreg with the size of 305mm multiplied by 1535mm, the 0 degree laying adopts the prepreg with the size of 1535mm multiplied by 305mm, and the splicing seams of the prepregs with the first, third and fifth layers of 0 degree laying need to be staggered;
7) laying a layer of polytetrafluoroethylene demolding cloth on the surface of the cable cover prefabricated part, wherein the demolding cloth is smooth and free of wrinkles, then laying a layer of breathable felt, putting a vacuum bag, pressurizing by adopting a vacuumizing mode, and putting the cable cover prefabricated part into an oven for heating and curing at 130 ℃ for 2h for molding.
8) And after solidification, cooling the cable cover to below 50 ℃ along with the furnace, taking out the cable cover prefabricated part from the mold, and polishing and trimming surface burrs to obtain a cable cover product.
The cable cover obtained by the process has the product mass of about 2.3Kg, and the weight is reduced by about 1.6Kg compared with the cable cover made of glass fiber composite material, and the weight is reduced by about 1.2Kg compared with the cable cover made of carbon fiber composite material.
Example 2
The structural parameters of the light cable shield embedded in the winding shell in a certain model are shown in table 1:
TABLE 1
| Serial number | Item | Structural parameters | |
| 1 | Radius of inner profile | 400mm | |
| 2 | Width of cavity in | 80mm | |
| 3 | Cavity height of hollow area | 8mm | |
| 4 | Width of | 225mm | |
| 5 | Cable | 3300mm | |
| 6 | Thickness of lower structural layer of foam | 1.2mm | |
| 7 | Thickness of upper structural layer of foam | 1.2mm |
The forming method of the light cable cover comprises the following steps:
1) and manufacturing a cable cover paving mould according to the structural size of the inner profile of the cable cover and the length size of the cable cover, wherein the cable cover paving mould is processed by adopting Q235 structural steel.
2) The PMI foam is subjected to machining, the transverse section of the machined PMI foam layer is the same as the structural size of the cable cover sandwich layer, and the longitudinal length of the sandwich layer is 300mm, namely the number of the PMI foam layers is (3300/300). times.2-22.
3) The cable cover adopts carbon fiber reinforced modified epoxy resin prepreg with the thickness of 0.3mm, the number of layers of a lower laying layer is 1.2/0.3-4, the number of layers of an upper laying layer is 1.2/0.3-4, and the fiber prepreg is cut according to the section size of the cable cover and the length size of the cable cover, and the method specifically comprises the following steps:
blanking size and number of lower fiber prepreg: 2 pieces of 245mm multiplied by 3300mm size prepreg, 2 pieces of 3300mm multiplied by 245mm size prepreg;
feeding size and quantity of the upper fiber prepreg: 2 pieces of prepreg with the size of 230mm multiplied by 3300mm, and 3 pieces of prepreg with the size of 3300mm multiplied by 230 mm;
the blanking sizes are the size parallel to the fiber direction of the fiber prepreg and the size vertical to the fiber direction of the fiber prepreg;
due to the limitation of the width of the fiber prepreg, in order to facilitate the subsequent manual laying operation, the size of 3300mm can be divided into 6 sections for cutting, and the total length is not less than 3300 mm.
4) Coating a release agent on the surface of a cable cover laying mold, then laying 4 layers of foam lower structure layers according to the sequence of fiber directions of 90 degrees, 0 degrees, 90 degrees and 0 degrees of fiber prepregs, wherein the 90-degree layer adopts the prepreg with the size of 245mm multiplied by 3300mm, the 0-degree layer adopts the prepreg with the size of 3300mm multiplied by 245mm, and splicing seams of the second-layer 0-degree layer and the fourth-layer 0-degree layer prepreg need to be staggered;
5) coating an epoxy resin adhesive on the surface of the mechanically-added PMI foam layer, and then bonding the PMI foam layer to the corresponding position of the cable cover;
6) laying structural layers on the foam according to the sequence of 90 degrees, 0 degrees, 90 degrees and 0 degrees of the fiber direction of the fiber prepreg, and laying 4 layers in total, wherein the prepreg with the size of 230mm multiplied by 3300mm is adopted for 90 degree laying, the prepreg with the size of 3300mm multiplied by 230mm is adopted for 0 degree laying, and the splicing seams of the prepreg with the 0 degree laying of the second layer and the 0 degree laying of the fourth layer need to be staggered;
7) laying a layer of polytetrafluoroethylene demolding cloth on the surface of the cable cover prefabricated part, wherein the demolding cloth is smooth and free of wrinkles, then laying a layer of breathable felt, putting a vacuum bag, pressurizing by adopting a vacuumizing mode, and putting the cable cover prefabricated part into an oven for heating and curing at 130 ℃ for 2h for molding.
8) And after solidification, cooling the cable cover to below 50 ℃ along with the furnace, taking out the cable cover prefabricated part from the mold, and polishing and trimming surface burrs to obtain a cable cover product.
The cable cover obtained by the process has the product mass of about 3.4Kg, and the weight is reduced by about 3.3Kg compared with the cable cover made of glass fiber composite material, and is reduced by about 2.5Kg compared with the cable cover made of carbon fiber composite material.
Claims (5)
1. A method for forming a light cable cover embedded in a winding shell is characterized in that the cross section of the cable cover comprises a structural layer (4) and two sandwich layers (3), wherein the structural layer (4) comprises an upper structural layer (4b) and two lower structural layers (4a) symmetrically arranged at two ends of the upper structural layer (4b), the outer surface of each lower structural layer (4a) and the inner surface of the end part of the upper structural layer (4b) are enclosed to form a closed cavity (6) for mounting the sandwich layers (3), a hollow area (5) is formed between the area between the two lower structural layers (4a) and the inner surface of the upper structural layer (4b), and the cambered surface radius of an inner molded surface (1) of the two lower structural layers (4a) is the same as the outer diameter of the winding shell; the method is characterized in that: the cable cover forming method specifically comprises the following steps:
1) the light foam material is machined, and the transverse section of the machined light foam layer is the same as the structural size of the sandwich layer (3); the longitudinal length of the sandwich layer (3) is 200-300 mm, and the number of the light foam layers is equal to the length of the cable cover/the length of the machined light foam layer multiplied by 2; when the calculated number of the light foam layers contains decimal, the number of the light foam layers is increased by one after the decimal is removed;
2) calculating the number of layers of the lower layer according to the thickness of the lower structural layer (4a) and the thickness of the single-layer fiber prepreg, calculating the number of layers of the upper layer according to the thickness of the upper structural layer (4b) and the thickness of the single-layer fiber prepreg, and then cutting the fiber prepreg according to the section size of the cable cover and the length size of the cable cover; because the cable cover is alternatively layered according to the sequence of 0 degree and 90 degrees in the fiber direction of the fiber prepreg, the cable cover is cut according to the fiber direction of the fiber prepreg during blanking; when the length of the cable cover is long, each layer of fiber prepreg is divided into multiple sections for cutting and laying operation, so that the total length is ensured, and splicing seams of the fiber prepregs in the 0-degree direction need to be staggered during subsequent laying operation;
3) coating a release agent on the surface of a cable cover laying mold, then laying a lower structural layer according to the sequence of the fiber direction of the fiber prepreg which is 0 degrees and 90 degrees alternately, and laying to the required number of layers;
4) coating an adhesive on the surface of the mechanically-added light foam layer, and then bonding the light foam layer to the corresponding positions at the two ends of the cable cover;
5) laying up structural layers according to the alternate sequence of 0 degrees and 90 degrees in the fiber direction of the fiber prepreg, and laying to the required number of layers to form a cable cover prefabricated part;
6) laying a layer of polytetrafluoroethylene demolding cloth on the surface of the cable cover prefabricated part, wherein the demolding cloth is smooth and free of wrinkles, then laying a layer of breathable felt, putting a vacuum bag, pressurizing by adopting a vacuumizing mode, and putting the cable cover prefabricated part into a drying oven for heating and curing molding; the curing system is performed in accordance with the curing system of the fiber prepreg employed.
2. A method of forming a lightweight cable cover embedded within a wound housing as claimed in claim 1, wherein: in the step 4), the adhesive is epoxy resin adhesive.
3. A method of forming a lightweight cable cover embedded within a wound housing as claimed in claim 1, wherein: the cable cover laying mold is manufactured according to the size of the inner profile of the cable cover and the length of the cable cover, and the cable cover laying mold is made of metal.
4. A method of forming a lightweight cable cover embedded within a wound housing as claimed in claim 1, wherein: the sandwich layer (3) is made of light foam material, and the light foam material is PMI foam.
5. A method of forming a lightweight cable cover embedded within a wound housing as claimed in claim 1, wherein: the upper structural layer (4b) and the lower structural layer (4a) are both formed by multiple layers of fiber prepregs, and the fiber prepregs are carbon fiber reinforced epoxy resin prepregs or glass fiber reinforced epoxy resin prepregs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892417.6A CN110481058B (en) | 2019-09-20 | 2019-09-20 | Method for forming light cable cover embedded in winding shell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910892417.6A CN110481058B (en) | 2019-09-20 | 2019-09-20 | Method for forming light cable cover embedded in winding shell |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110481058A CN110481058A (en) | 2019-11-22 |
| CN110481058B true CN110481058B (en) | 2021-08-06 |
Family
ID=68558941
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910892417.6A Active CN110481058B (en) | 2019-09-20 | 2019-09-20 | Method for forming light cable cover embedded in winding shell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110481058B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112590249A (en) * | 2020-12-03 | 2021-04-02 | 湖北三江航天江北机械工程有限公司 | Cable cover integral forming method |
| CN113478863B (en) * | 2021-06-30 | 2023-06-27 | 西南电子技术研究所（中国电子科技集团公司第十研究所） | Method for molding and embedding composite material into cable assembly |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202130570U (en) * | 2011-05-16 | 2012-02-01 | 湖北航天技术研究院总体设计所 | Aircraft cowling shell |
| CN102856643A (en) * | 2012-07-31 | 2013-01-02 | 深圳光启创新技术有限公司 | Multilayer core metamaterial, manufacture method thereof and manufacture method of multilayer core metamaterial radome |
| CN203013511U (en) * | 2012-12-31 | 2013-06-19 | 郑州华容电气科技有限公司 | Protective cover of track compensation capacitor |
| CN104275804A (en) * | 2014-05-27 | 2015-01-14 | 航天材料及工艺研究所 | Preparation method of large-size thin-wall foam sandwich structure and application of structure |
| CN204223186U (en) * | 2014-10-23 | 2015-03-25 | 北京宇航系统工程研究所 | A kind of light thin-wall composite structure fairing |
| CN206614815U (en) * | 2017-03-17 | 2017-11-07 | 零八一电子集团四川天源机械有限公司 | PMI foam layer radome of fighter |
| CN107676814A (en) * | 2017-09-26 | 2018-02-09 | 湖北三江航天江北机械工程有限公司 | Inside bury the composite shell preparation of cable |
| CN108995265A (en) * | 2018-06-25 | 2018-12-14 | 湖北三江航天江北机械工程有限公司 | Big L/D ratio winds shell cable hood Preembedded method |
| CN109094058A (en) * | 2018-07-12 | 2018-12-28 | 湖北三江航天江北机械工程有限公司 | Light composite material bullet support and its manufacturing method |
| CN109638445A (en) * | 2018-10-26 | 2019-04-16 | 上海无线电设备研究所 | A kind of high temperature resistant foam A interlayer composite material antenna house and preparation method thereof |
| CN109822949A (en) * | 2019-01-25 | 2019-05-31 | 航天材料及工艺研究所 | A kind of preparation method of the rocket long row's cover of light sandwich structure |
| CN110053277A (en) * | 2019-04-26 | 2019-07-26 | 哈尔滨哈玻拓普复合材料有限公司 | A kind of injection moulding method of foam layer radome component |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106739043B (en) * | 2017-03-17 | 2023-05-26 | 零八一电子集团四川天源机械有限公司 | PMI foam sandwich aircraft radome and manufacturing method thereof |
-
2019
- 2019-09-20 CN CN201910892417.6A patent/CN110481058B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202130570U (en) * | 2011-05-16 | 2012-02-01 | 湖北航天技术研究院总体设计所 | Aircraft cowling shell |
| CN102856643A (en) * | 2012-07-31 | 2013-01-02 | 深圳光启创新技术有限公司 | Multilayer core metamaterial, manufacture method thereof and manufacture method of multilayer core metamaterial radome |
| CN203013511U (en) * | 2012-12-31 | 2013-06-19 | 郑州华容电气科技有限公司 | Protective cover of track compensation capacitor |
| CN104275804A (en) * | 2014-05-27 | 2015-01-14 | 航天材料及工艺研究所 | Preparation method of large-size thin-wall foam sandwich structure and application of structure |
| CN204223186U (en) * | 2014-10-23 | 2015-03-25 | 北京宇航系统工程研究所 | A kind of light thin-wall composite structure fairing |
| CN206614815U (en) * | 2017-03-17 | 2017-11-07 | 零八一电子集团四川天源机械有限公司 | PMI foam layer radome of fighter |
| CN107676814A (en) * | 2017-09-26 | 2018-02-09 | 湖北三江航天江北机械工程有限公司 | Inside bury the composite shell preparation of cable |
| CN108995265A (en) * | 2018-06-25 | 2018-12-14 | 湖北三江航天江北机械工程有限公司 | Big L/D ratio winds shell cable hood Preembedded method |
| CN109094058A (en) * | 2018-07-12 | 2018-12-28 | 湖北三江航天江北机械工程有限公司 | Light composite material bullet support and its manufacturing method |
| CN109638445A (en) * | 2018-10-26 | 2019-04-16 | 上海无线电设备研究所 | A kind of high temperature resistant foam A interlayer composite material antenna house and preparation method thereof |
| CN109822949A (en) * | 2019-01-25 | 2019-05-31 | 航天材料及工艺研究所 | A kind of preparation method of the rocket long row's cover of light sandwich structure |
| CN110053277A (en) * | 2019-04-26 | 2019-07-26 | 哈尔滨哈玻拓普复合材料有限公司 | A kind of injection moulding method of foam layer radome component |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110481058A (en) | 2019-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105034403B (en) | Method for manufacturing composite shell | |
| CN110481058B (en) | Method for forming light cable cover embedded in winding shell | |
| CN104842593B (en) | Carbon fiber honeycomb and preparation method thereof | |
| EP2047971B1 (en) | Method for manufacturing beams of fiber-reinforced composite material | |
| CN105922703B (en) | A kind of thin-walled foam interlayer structure compound material antenna house preparation method | |
| CN106515045B (en) | Composite material joint skirt automatic placement molding method | |
| CA2658724A1 (en) | Method for production of a plurality of fiber-composite structural elements | |
| US20150053332A1 (en) | Method and device for manufacturing composite material parts | |
| CN109353031A (en) | The preparation method of battery box cover | |
| CN101932432A (en) | Method for producing fuselage cell sections for aircraft with composite fibre materials, and a device | |
| CN102105296A (en) | Device and method for the manufacture of three dimensional beam type elements in composite material | |
| CN109822949B (en) | Preparation method of light sandwich structure long row cover for rocket | |
| US8047237B2 (en) | Thermosetting or thermoplastic arrangement for manufacturing piping for air conditioning | |
| RU2013112546A (en) | METHOD FOR MANUFACTURING FLAT BILLING FROM THE BURN | |
| JP2018202753A (en) | Method for manufacturing carbon fiber reinforced resin member | |
| CN110216902A (en) | A kind of metal rudder core adds the dead size RTM forming method of polymer matrix composites | |
| CN110962369A (en) | Integral forming process method of large-size special-shaped reinforced protective cover | |
| CN114261107B (en) | Composite material tubular beam and forming method thereof | |
| CN105034402A (en) | Moulding method of missile launcher cylinder body | |
| KR101447136B1 (en) | Method for Forming Fiber Reinforced Plastic Composite | |
| CN104385626B (en) | Preparation method based on the composite material thin wall housing being interrupted laying | |
| CN104385625B (en) | Composite material thin wall housing preparation method based on unloading port | |
| JP2020040402A (en) | Method for manufacturing curved omega stringers and z-shaped stringers of composite material, and method for manufacturing composite material stiffened panel with curvature | |
| KR102354945B1 (en) | Method for forming composite multi-joint hollow structure using flexible tube and prepreg | |
| CN117429598A (en) | Special-shaped reinforced rigidity-variable composite material structure and forming method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |