Split type core mold tool for fiber winding shell barrel section

Abstract

The invention relates to the technical field of composite material winding forming, in particular to a split type core mold tool for a fiber winding shell barrel section, which comprises a main shaft, a telescopic piece and core mold petals, the core mold petals are connected with the telescopic pieces through guide grooves formed in the inner surfaces of the core mold petals; the guide groove comprises a first groove and a second groove which are communicated with each other; an included angle alpha between the first groove and the second groove is more than or equal to 90 degrees and less than 180 degrees; the core mold petals are connected with the main shaft through telescopic pieces; at least two telescopic pieces are arranged in the axial direction of the main shaft; and the telescopic piece is connected with the main shaft through a sliding piece. According to the split type core mold tool for the fiber winding shell barrel section, by means of cooperation of the guide grooves, the core mold petals and the telescopic pieces, rapid demolding can be achieved after fiber winding forming is completed, the telescopic pieces are stretched to form the corresponding tool when the tool is used again, the fiber winding forming efficiency is remarkably improved, and the production cost is reduced. The production of a fiber winding forming body is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of composite material winding molding, and in particular to a split-flap core mold tooling for a fiber-winding shell barrel section. Background Art

[0002] The filament-wound casing of a solid rocket motor, especially a large-sized filament-wound casing, requires a core mold as a supporting structure during the manufacturing and winding process to complete the filament winding process.

[0003] At present, sand core molds are commonly used for winding molding. For example, CN113123897A discloses a method for molding a solid rocket engine combustion chamber charge column fixing frame, and the molding steps are as follows: S1, design a core mold molding tool, install the charge column fixing frame at a specified position, and then fill the core mold tool with water-soluble sand core filler, put it into a furnace for drying, and finally disassemble the core mold tool to achieve overall molding; S2, brush adhesive on the surface of the core mold charge column fixing frame, form a demoulding layer on the remaining core mold surface, perform inner insulation layer overmolding, perform fiber winding according to a certain winding tension, perform inner insulation layer pre-vulcanization, and remove the fiber; S3, perform fiber winding on the surface of the inner insulation layer, and then solidify the winding layer when the specified thickness is reached; S4, after the combustion chamber shell is solidified, disassemble the winding mandrel, take out the sand core mold to melt, and complete the separation of the core mold and the inner insulation layer.

[0004] CN103883871A discloses a lightweight high-temperature and high-pressure composite gas cylinder and a manufacturing method thereof, comprising nozzles at both ends and a bottle body in the middle, wherein the bottle body comprises, from the inside to the outside, an ablation-resistant thin-walled metal liner, a ceramic tile insulation layer, a rubber insulation layer, and a winding layer, wherein the winding layer is a carbon fiber reinforced resin-based composite material. The manufacturing method comprises the following steps: 1) ellipsoid molding; 2) sand core molding; 3) metal liner molding; 4) insulation layer molding; 5) winding layer molding; 6) demoulding and sand core dissolution.

[0005] However, when using a sand core mold for winding molding, the core mold can only be used once, and a lot of time is needed to clean it after use. At the same time, the sand core mold has to be made again, which makes the entire production cycle of the winding shell longer, which is not conducive to the efficient production of the fiber winding shell. Summary of the invention

[0006] In view of the problems existing in the prior art, the purpose of the present invention is to provide a split core mold tooling for a fiber winding shell barrel section, so as to solve the problem that when a sand core mold is used for winding molding, the core mold can only be used once, and a lot of time is required to clean it after use. At the same time, the sand core mold has to be made again, which makes the entire production cycle of the winding shell longer, which is not conducive to the efficient production of the fiber winding shell.

[0007] To achieve this object, the present invention adopts the following technical solutions:

[0008] The present invention provides a split-flap core mold tooling for a fiber-wound shell barrel section, the split-flap core mold tooling for a fiber-wound shell barrel section comprising:

[0009] Spindle, telescopic parts and core mold flaps;

[0010] The core mold half is connected to the telescopic member via a guide groove arranged on the inner surface of the core mold half; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 90°≤α<180°;

[0011] The core mold flap is connected to the main shaft through a telescopic member;

[0012] At least two telescopic members are provided along the axial direction of the main shaft;

[0013] The telescopic member is connected to the main shaft via a sliding member.

[0014] The split-flap core mold tooling for the fiber winding shell barrel section provided by the present invention can, through the cooperation of the guide groove, the core mold flaps and the telescopic parts, realize the turning of the core mold flaps when the telescopic parts are contracted after the fiber winding molding is completed, thereby separating the fiber molding body and realizing rapid demoulding. When it is used again, the telescopic parts are extended to form the corresponding tooling, which significantly improves the efficiency of the fiber winding molding and is beneficial to the production of the fiber winding molding body.

[0015] As a preferred technical solution of the present invention, the telescopic member and the sliding member are movably connected.

[0016] As a preferred technical solution of the present invention, a guiding and positioning structure is arranged between the sliding member and the main shaft.

[0017] As a preferred technical solution of the present invention, a limited position matching mechanism is arranged between adjacent core mold halves.

[0018] As a preferred technical solution of the present invention, a pressure detection device is arranged in the limit matching structure.

[0019] As a preferred technical solution of the present invention, the connecting member between the telescopic member and the guide groove moves from the first groove to the second groove when the telescopic member contracts.

[0020] As a preferred technical solution of the present invention, the length of the first groove is greater than the length of the second groove.

[0021] As a preferred technical solution of the present invention, the first groove extends on the core mold halves along a generatrix of the fiber-wound shell barrel section as a reference.

[0022] As a preferred technical solution of the present invention, the core mold halves are divided into n equal parts according to the bottom circle of the fiber-wound shell barrel section, where n≥3.

[0023] As a preferred technical solution of the present invention, the telescopic member includes an electric telescopic member and / or a hydraulic telescopic member.

[0024] Compared with the prior art solutions, the present invention has the following beneficial effects:

[0025] The split-flap core mold tooling provided by the present invention has the advantages of easy assembly and reusability. This type of tooling is used for solid rocket engine composite material shell molding and large aspect ratio non-metallic container winding molding to effectively improve efficiency and reduce costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the development of a split-petal core mold tooling for a fiber-wound shell barrel section provided by an embodiment of the present invention;

[0027] Figure 2 The present invention is a schematic diagram of the contraction of a split-flap core mold tooling for a rated fiber-wound shell barrel section provided in accordance with the present invention.

[0028] In the figure: 100-main shaft, 200-telescopic part, 300-core mold flap.

[0029] The present invention is further described in detail below. However, the following examples are only simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims. DETAILED DESCRIPTION

[0030] To better illustrate the present invention and facilitate understanding of the technical solution of the present invention, typical but non-limiting embodiments of the present invention are as follows:

[0031] This embodiment provides a split-flap core mold tooling for a fiber-wound shell barrel section, such as Figure 1 and Figure 2 As shown, Figure 1 That is the working state when fiber winding is performed. Figure 2 This is the state of the core mold tooling when demoulding after fiber winding and molding. It can be seen that the tooling is convenient to be taken out from the molded body by shrinking the tooling with the telescopic parts. The tooling includes:

[0032] The main shaft 100, the telescopic member 200 and the core mold flap 300;

[0033] The core mold half 300 is connected to the telescopic member 200 via a guide groove provided on the inner surface of the core mold half 300; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 90°≤α<180°;

[0034] The core mold piece 300 is connected to the main shaft 100 through the telescopic member 200;

[0035] At least two telescopic members 200 are provided along the axial direction of the main shaft 100;

[0036] The telescopic member 200 is connected to the main shaft 100 via a sliding member.

[0037] In the present invention, fiber winding refers to winding the fiber on a core mold according to a set winding trajectory and then molding it. The fiber used is a fiber prepreg or fiber, or the fiber is coated with a resin material after being wound in sections for a set number of layers for curing and molding. The cylindrical fiber shell obtained by molding can be the barrel section of a rocket solid engine shell, etc., or other fiber shells with a columnar structure.

[0038] Specifically, the fibers and bonding materials used can be reasonably selected and designed according to the purpose of the final molded product, and the present invention does not make specific limitations.

[0039] In the present invention, the number of core mold halves 300 is reasonably designed based on actual requirements. In principle, the more the better. The more core mold halves 300 there are, the more advantageous it is to configure fiber winding cylinders of different diameters through the number of core mold halves 300, thereby broadening the scope of use of a single tooling.

[0040] Wherein, the telescopic member 200 and the sliding member are movably connected.

[0041] Wherein, a guiding and positioning structure is arranged between the sliding member and the main shaft 100 .

[0042] In the present invention, the guide positioning structure disposed between the sliding member and the main shaft 100 can prevent the sliding member from rotating relative to the main shaft 100 during the sliding process, thereby preventing the instability of the tooling caused by the sliding.

[0043] In the present invention, the guiding and positioning structure can be selected to achieve guidance through a concave-convex matching structure, such as setting a protrusion on the main shaft 100, and then configuring a corresponding groove on the sliding part, so that the protrusion and the groove match to prevent the sliding part from rotating around the main shaft 100.

[0044] Wherein, a limited position matching mechanism is arranged between adjacent core mold halves 300 .

[0045] Wherein, a pressure detection device is arranged in the limit matching structure.

[0046] In the present invention, through the configuration of the limit matching mechanism and the pressure detection device, the core mold half 300 can be well matched, and the damage of the core mold half 300 caused by excessive stretching during the stretching process due to the interference of the matching structure can be avoided.

[0047] Wherein, when the telescopic member 200 is retracted, the connecting member between the telescopic member 200 and the guide groove moves from the first groove to the second groove.

[0048] The length of the first groove is greater than the length of the second groove.

[0049] In the present invention, it is preferred to control the length of the first groove greater than the length of the second groove to meet the requirements of efficient preparation of the solid rocket engine head. When preparing other fiber-wound moldings, the lengths of the first groove and the second groove can be reasonably designed based on the volume required after the core mold shrinks.

[0050] The first groove extends on the core mold half 300 based on the generatrix of the fiber-wound shell barrel section.

[0051] The core mold halves 300 are divided into n equal parts based on the bottom circle of the fiber winding shell barrel section, where n≥3. Specifically, the side of the hollow cylindrical winding body is divided into equal parts based on the bottom circle of the cylinder, and the side is divided along the generatrix of the cylinder.

[0052] In the present invention, each of the petals obtained by dividing the petals into n equal parts is independently provided with a corresponding telescopic member 200 .

[0053] Wherein, the telescopic member 200 includes an electric telescopic member and / or a hydraulic telescopic member.

[0054] Further, in order to illustrate the efficient fiber forming effect that can be achieved by the split-petal core mold tooling for fiber winding shell barrel section provided by the present invention, the following actual example is used for illustration, as follows:

[0055] Example 1

[0056] This embodiment provides a split-type core mold tooling for a fiber-wound shell barrel section, and the split-type core mold tooling for a fiber-wound shell barrel section includes:

[0057] Spindle, telescopic parts and core mold flaps;

[0058] The core mold piece is connected to the telescopic member through a guide groove arranged on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 90°;

[0059] The core mold flap is connected to the main shaft through a telescopic member;

[0060] The telescopic members are provided with two in the axial direction of the main shaft;

[0061] The telescopic member is connected to the main shaft via a sliding member; the telescopic member and the sliding member are movably connected;

[0062] When the telescopic part and the guide groove are retracted, the connecting part moves from the first groove to the second groove, the length of the first groove is twice the length of the second groove, the first groove extends on the core mold flap along the busbar of the fiber winding shell barrel section as a reference, and the core mold flap is divided into n equal parts according to the bottom circle of the fiber winding shell barrel section, which is divided into 18 flaps in total. At this time, there are 36 telescopic parts in total, and 2 are set for each core mold flap, which are distributed at the head and end of the core mold flap.

[0063] Example 2

[0064] This embodiment provides a split-type core mold tooling for a fiber-wound shell barrel section, and the split-type core mold tooling for a fiber-wound shell barrel section includes:

[0065] Spindle, telescopic parts and core mold flaps;

[0066] The core mold piece is connected to the telescopic member via a guide groove arranged on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 120°;

[0067] The core mold flap is connected to the main shaft through a telescopic member;

[0068] The telescopic members are provided with three in number along the axial direction of the main shaft;

[0069] The telescopic member is connected to the main shaft via a sliding member; the telescopic member and the sliding member are movably connected;

[0070] A guide and positioning structure is arranged between the sliding member and the main shaft;

[0071] When the telescopic part is contracted, the connecting part between the telescopic part and the guide groove moves from the first groove to the second groove, the length of the first groove is twice the length of the second groove, the first groove extends on the core mold flap along the busbar of the fiber winding shell barrel section as a reference, and the core mold flap is divided into n equal parts according to the bottom circle of the fiber winding shell barrel section, which is divided into 20 flaps in total. At this time, there are 60 telescopic parts in total, and 3 are arranged in each core mold flap, which are distributed at the head end, middle and end of the core mold flap.

[0072] Example 3

[0073] This embodiment provides a split-type core mold tooling for a fiber-wound shell barrel section, and the split-type core mold tooling for a fiber-wound shell barrel section includes:

[0074] Spindle, telescopic parts and core mold flaps;

[0075] The core mold piece is connected to the telescopic member through a guide groove arranged on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 90°;

[0076] The core mold flap is connected to the main shaft through a telescopic member;

[0077] The telescopic members are provided with two in the axial direction of the main shaft;

[0078] The telescopic member is connected to the main shaft via a sliding member; the telescopic member and the sliding member are movably connected;

[0079] A limited position matching mechanism is arranged between adjacent core mold halves. A pressure detection device is arranged in the limited position matching structure;

[0080] When the telescopic part is contracted, the connecting part between the telescopic part and the guide groove moves from the first groove to the second groove; the length of the first groove is twice the length of the second groove; the first groove extends on the core mold flap along the generatrix of the fiber winding shell barrel section as a reference; the core mold flap is divided into n equal parts according to the bottom circle of the fiber winding shell barrel section, and is divided into 18 flaps in total. At this time, there are 36 telescopic parts in total, and 2 are set for each core mold flap, distributed at the head and end of the core mold flap.

[0081] Example 4

[0082] This embodiment provides a split-type core mold tooling for a fiber-wound shell barrel section, and the split-type core mold tooling for a fiber-wound shell barrel section includes:

[0083] Spindle, telescopic parts and core mold flaps;

[0084] The core mold piece is connected to the telescopic member through a guide groove arranged on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 145°;

[0085] The core mold flap is connected to the main shaft through a telescopic member;

[0086] The telescopic members are provided with three in number along the axial direction of the main shaft;

[0087] The telescopic member is connected to the main shaft via a sliding member; the telescopic member and the sliding member are movably connected;

[0088] A limited position matching mechanism is arranged between adjacent core mold halves; a pressure detection device is arranged in the limited position matching structure;

[0089] A guide and positioning structure is arranged between the sliding member and the main shaft;

[0090] When the telescopic member is retracted, the connecting member between the telescopic member and the guide groove moves from the first groove to the second groove. The length of the first groove is greater than the length of the second groove. The first groove extends on the core mold flap along the generatrix of the fiber winding shell barrel section as a reference. The core mold flap is divided into n equal parts according to the bottom circle of the fiber winding shell barrel section, and is divided into 30 flaps in total. At this time, there are 90 telescopic members in total, and 3 are set in each core mold flap, distributed at the head end, middle and end of the core mold flap.

[0091] The tooling obtained by the above embodiment is used to carry out winding and molding of the cylindrical fiber body, as follows: the telescopic parts of the cylindrical split-flap core mold tooling used for fiber winding are controlled to extend so that the core mold flaps fit together, and then the fiber is wound and molded. After the molding is completed, the telescopic parts are controlled to contract so that the core mold flaps are separated from the molded fiber profile.

[0092] In summary, the split-flap core mold tooling for the fiber winding shell barrel section provided by the present invention can, through the cooperation of the guide groove, the core mold flaps and the telescopic parts, realize turning of the core mold flaps when the telescopic parts are contracted after the fiber winding molding is completed, thereby separating the fiber molding body and realizing rapid demoulding. When used again, the telescopic parts are extended to form the corresponding tooling, which significantly improves the efficiency of the fiber winding molding and is beneficial to the production of the fiber winding molding body.

[0093] The preferred embodiments of the present invention are described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the technical concept of the present invention, a variety of simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0095] In addition, various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A split-flap core mold tooling for a fiber-wound shell barrel section, characterized in that: The split-flap core mold tooling for the fiber-wound shell barrel section comprises: Spindle, telescopic parts and core mold flaps; The core mold half is connected to the telescopic member via a guide groove arranged on the inner surface of the core mold half; the guide groove includes a first groove and a second groove connected, and the angle α between the first groove and the second groove is 90°≤α<180°; The core mold flap is connected to the main shaft through a telescopic member; At least two telescopic members are provided along the axial direction of the main shaft; The telescopic member is connected to the main shaft via a sliding member.

2. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: The telescopic member and the sliding member are movably connected.

3. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: A guiding and positioning structure is arranged between the sliding member and the main shaft.

4. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: A limited position matching mechanism is arranged between adjacent core mold halves.

5. The split-flap core mold tooling for the fiber-wound shell barrel section according to claim 4 is characterized in that: A pressure detection device is arranged in the limit matching structure.

6. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: The connecting piece between the telescopic piece and the guide groove moves from the first groove to the second groove when the telescopic piece contracts.

7. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: The length of the first groove is greater than the length of the second groove.

8. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1 is characterized in that: The first groove extends on the core mold half along a generatrix of the fiber-wound shell barrel section as a reference.

9. The split-flap core mold tooling for the fiber-winding shell barrel section according to claim 1, characterized in that: The core mold halves are divided into n equal parts according to the bottom circle of the fiber-wound shell barrel section, where n≥3.

10. The split-flap core mold tooling for the fiber winding shell fiber winding shell barrel section according to claim 1 is characterized in that: The telescopic member includes an electric telescopic member and / or a hydraulic telescopic member.

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