Split core mold tooling for filament wound case barrel segments

Abstract

The application relates to a split core mold tool for a fiber winding shell cylinder segment, and relates to the technical field of composite material winding forming, which comprises a main shaft, a telescopic piece and a core mold segment. The core mold segment is connected with the telescopic piece through a guide groove arranged on the inner surface of the core mold segment. The guide groove comprises a first groove and a second groove, and the included angle alpha of the first groove and the second groove is 90 DEG <= alpha < 180 DEG. The core mold segment is connected with the main shaft through the telescopic piece. At least two telescopic pieces are arranged along the axial direction of the main shaft. The telescopic piece and the main shaft are connected through a sliding piece. The split core mold tool for the fiber winding shell cylinder segment can realize rapid demolding after the fiber winding forming is completed by the cooperation of the guide groove, the core mold segment and the telescopic piece, the telescopic piece is elongated when used again, corresponding tools are formed, the efficiency of the fiber winding forming is remarkably improved, and the production of the 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 petal-type core mold tooling for a fiber-wound shell barrel segment. Background Art

[0002] The fiber-wound casing of a solid rocket motor, especially a large-sized fiber-wound casing, requires a core mold as a supporting structure during the manufacturing and winding process to complete the fiber 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 holder, and the molding steps are as follows: S1, designing a core mold molding tooling, installing the charge holder at a specified position, and then filling the core mold tooling with water-soluble sand core filler, putting it into a furnace for drying, and finally disassembling the core mold tooling to achieve overall molding; S2, brushing adhesive on the surface of the core mold charge holder, forming a demoulding layer on the remaining core mold surface, and performing inner insulation layer overmolding, performing fiber winding according to a certain winding tension, performing inner insulation layer pre-vulcanization, and removing the fiber; S3, performing fiber winding on the surface of the inner insulation layer, and then curing the winding layer after reaching a specified thickness; S4, after the combustion chamber shell is cured, disassembling the winding mandrel, taking out the sand core mold and melting it, and completing the separation of the core mold and the inner insulation layer.

[0004] CN103883871A discloses a lightweight, high-temperature, high-pressure composite gas cylinder and its manufacturing method. The cylinder comprises two nozzles at each end and a central cylinder body. The cylinder body comprises, from the inside out, an ablation-resistant thin-walled metal liner, a ceramic tile insulation layer, a rubber insulation layer, and a wrapping layer made of a carbon fiber-reinforced resin-based composite material. The manufacturing method includes the following steps: 1) ellipsoidal molding; 2) sand core molding; 3) metal liner molding; 4) insulation layer molding; 5) wrapping layer molding; and 6) demolding and sand core dissolution.

[0005] However, when using a sand core mold for winding molding, the core mold can only be used once, and it takes a lot of time 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 petal-type core mold tooling for a fiber-wound 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-wound shell.

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

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

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

[0010] The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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 guide 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 configured between adjacent core mold halves.

[0018] As a preferred technical solution of the present invention, a pressure detection device is configured in the limiting cooperation structure.

[0019] As a preferred technical solution of the present invention, 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.

[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 based on the generatrix of the fiber-wound shell barrel section.

[0022] As a preferred technical solution of the present invention, the core mold flap is 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 existing technical solutions, the present invention has the following beneficial effects:

[0025] The split-type core mold tooling provided by the present invention has the advantages of easy assembly and reusability. This type of tooling can be 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 1. It is a schematic diagram of the expansion of a split-type core mold tooling for a filament-wound shell barrel section provided by an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the contraction of a split-type core mold tooling for a rated fiber-wound shell barrel section provided by 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 merely 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 solutions of the present invention, typical but non-limiting embodiments of the present invention are as follows:

[0031] This embodiment provides a split-type 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 facilitated to be removed from the molded body by the telescopic parts after shrinking the tooling. The tooling includes:

[0032] Main shaft 100, telescopic member 200 and core mold flap 300;

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

[0034] The core mold flap 300 is connected to the main shaft 100 via a 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 and then cured and molded. 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 adhesive 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 flaps 300 is reasonably designed based on actual requirements. In principle, the more the better. The more core mold flaps 300 there are, the more conducive it is to realize the configuration of fiber winding cylinders of different diameters through the number of core mold flaps 300, thereby broadening the scope of use of a single tool.

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

[0041] A guide and positioning structure is provided between the sliding member and the main shaft 100 .

[0042] In the present invention, the guide and 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 optionally guided by 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 configured between adjacent core mold halves 300.

[0045] Wherein, a pressure detection device is arranged in the limiting cooperation structure.

[0046] In the present invention, through the configuration of the limiting matching mechanism and the pressure detection equipment, the core mold flap 300 can be well matched, avoiding damage to the core mold flap 300 due to interference of the matching structure during excessive stretching during the stretching process.

[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 to be 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 segment 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 surfaces of the hollow cylindrical winding body are divided into equal parts based on the bottom circle of the cylinder, and the side surfaces are divided along the main line of the cylinder.

[0052] In the present invention, each of the n equally divided petals 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] Furthermore, in order to illustrate the efficient fiber forming effect that can be achieved by the split-type core mold tooling for fiber winding shell barrel segments provided by the present invention, the following actual examples are used for illustration, as follows:

[0055] Example 1

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

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

[0058] The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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] Two telescopic members are provided along 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 connecting part of the guide groove are contracted, 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, and the first groove extends on the core mold flap based on the busbar of the fiber-wound shell barrel section. The core mold flap is divided into n equal parts according to the bottom circle of the fiber-wound shell barrel section, and is divided into 18 flaps in total. At this time, there are a total of 36 telescopic parts, 2 of which are set for each core mold flap, 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 filament-wound shell barrel section, the split-type core mold tooling for a filament-wound shell barrel section comprising:

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

[0066] The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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 in three numbers 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 provided between the sliding member and the main shaft;

[0071] When the telescopic part and the connecting part of the guide groove are contracted, 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, and the first groove extends on the core mold flap along the busbar of the fiber-wound shell barrel section as a reference. The core mold flap is divided into n equal parts according to the bottom circle of the fiber-wound shell barrel section, and is divided into 20 flaps in total. At this time, there are a total of 60 telescopic parts, 3 of which are set in each core mold flap, 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 filament-wound shell barrel section, the split-type core mold tooling for a filament-wound shell barrel section comprising:

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

[0075] The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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] Two telescopic members are provided along 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 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-wound shell barrel section as a reference; the core mold flap is divided into n equal parts according to the bottom circle of the fiber-wound shell barrel section, and is divided into 18 flaps in total. At this time, there are a total of 36 telescopic parts, 2 of which 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 filament-wound shell barrel section, the split-type core mold tooling for a filament-wound shell barrel section comprising:

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

[0084] The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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 in three numbers 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 provided 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 busbar of the fiber-wound shell barrel section as a reference. The core mold flap is divided into n equal parts based on the bottom circle of the fiber-wound shell barrel section, for a total of 30 flaps. At this time, there are a total of 90 telescopic members, 3 of which are set in each core mold flap, distributed at the beginning, middle and end of the core mold flap.

[0091] The tooling obtained in the above embodiment is used to carry out winding and molding of cylindrical fiber bodies as follows: the telescopic parts of the cylindrical split-type core mold tooling used for fiber winding are controlled to stretch so that the core mold petals fit together, and then the fibers are wound and molded. After the molding is completed, the telescopic parts are controlled to contract so that the core mold petals 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, through the cooperation of the guide groove, the core mold flaps and the telescopic parts, can 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 demolding. 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, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection 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 appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0095] In addition, the 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-type core mold tooling for a fiber-wound shell barrel section, characterized in that: The split-type core mold tooling for the filament winding shell barrel section includes: Spindle, telescopic parts and core mold flaps; The core mold piece is connected to the telescopic member via a guide groove provided on the inner surface of the core mold piece; the guide groove includes a first groove and a second groove in communication, 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-type core mold tooling for the fiber-wound shell barrel section according to claim 1 is characterized in that: The telescopic member and the sliding member are movably connected.

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

4. The split-type core mold tooling for the fiber-wound 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-type 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 position-limiting cooperation mechanism.

6. The split-type core mold tooling for the fiber-wound 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-type core mold tooling for the fiber-wound 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-type core mold tooling for the fiber-wound shell barrel section according to claim 1 is characterized in that: The first groove extends on the core mold halves based on the generatrix of the fiber-wound shell barrel section.

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

10. The split-type core mold tooling for the fiber-wound 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.

Images