Forming die and manufacturing method for composite cylinder with integrally-formed flange

Abstract

The invention provides a composite barrel forming die with an integrally-formed flange and a manufacturing method, the forming die comprises a clamping block, an extension rod, a shaft, a check ring assembly, the flange, an electric heating sleeve, a surrounding strip, a flange pressing plate, a die core and a punching device; the check ring assembly is installed at the end of the mold core. The die core is sleeved with the flange, one end face of the flange is detachably connected with the check ring assembly, and the other end face of the flange abuts against the flanging root of the composite cylinder to be machined; the foxing strip and the flange pressing plate are arranged on a turned-over edge of a to-be-machined composite cylinder in a sleeving mode, and the electric heating sleeve is arranged on the foxing strip in a sleeving mode. The punching equipment is used for punching the flanging part of the to-be-machined composite barrel. The flange and the barrel can be integrally formed, the advantage of high tensile strength of fibers in a composite material is fully exerted, and the flange and the composite barrel are integrated, so that the flange and the composite barrel are high in connection strength and not prone to damage, and the flange and the composite barrel can be suitable for special working conditions needing high interface strength of the flange and the composite barrel.

Description

Technical Field

[0001] The invention relates to the field of moulds, and in particular to a composite barrel forming mould with an integrally formed flange. Background Art

[0002] Box (barrel) launch technology is a popular and advanced launch device design technology in the world today. The composite barrel is the main load-bearing part when the barreled missile is transported and lifted on land, rail, sea, and air, and ensures that the missile can be launched smoothly. Metal materials such as special steel and high-strength aluminum are still widely used in the manufacture of launch barrels. In the face of the development direction of lightweight weapon systems, carbon fiber composite materials among non-metallic materials have the potential to be used as launch barrel manufacturing materials and have begun to be used in large quantities.

[0003] At present, the connecting flanges of composite cylinders are mostly installed by assembly, that is, the composite cylinders are all cylindrical without flanges, and the flanges are connected to the composite cylinders by gluing or gluing + screwing. The connection strength mainly depends on the adhesive or screws. Long-term stress may cause fatigue risks and affect the interface strength. There are certain risks for certain special operating conditions. Summary of the invention

[0004] In view of the defects in the prior art, the object of the present invention is to provide a composite cylinder forming mold with an integrally formed flange and a manufacturing method.

[0005] According to the present invention, a composite cylinder forming mold with an integrally formed flange includes a clamping block, an extension rod, a shaft, a retaining ring assembly, a flange, an electric heating sleeve, a surrounding strip, a flange pressing plate, a mold core, and a punching device;

[0006] The clamping block is connected to one end of the shaft through the extension rod, and the other end of the shaft passes through the end of the mold core and is connected to the inner cavity of the mold core;

[0007] The retaining ring assembly is installed at the end of the mold core;

[0008] The flange is sleeved on the mold core, one end face of the flange is detachably connected to the retaining ring assembly, and the other end face of the flange abuts against the root of the flange of the composite cylinder to be processed;

[0009] The surrounding strip and the flange pressing plate are both mounted on the flange of the composite material cylinder to be processed, the other end face of the flange is also against one end face of the surrounding strip, and the other end face of the surrounding strip is against the flange pressing plate; the electric heating sleeve is mounted on the surrounding strip;

[0010] The punching device is used for punching holes in the flanged portion of the composite material cylinder to be processed.

[0011] Preferably, the retaining ring assembly comprises a retaining ring and a plurality of equal-height blocks;

[0012] An equal height block is arranged between one end of the flange and the retaining ring, and one end of the flange is connected to the retaining ring through screws.

[0013] Preferably, the main body of the mold core is a tubular structure, the wall thickness is not less than 15 mm, the mold core straightness is not less than 0.15 mm, the mold core end face verticality is not less than 0.1, and the mold surface roughness is not less than 1.6;

[0014] The end diameter of the mold core is larger or smaller than the main body diameter of the mold core;

[0015] The inner cavity of the mold core is provided with a supporting structure, and the outer surface is provided with a demoulding slope;

[0016] Preferably, the mold core is made of metal.

[0017] Preferably, the flange is a petal structure, consisting of at least two petals.

[0018] Preferably, the parallelism of the left and right end surfaces of the flange is not less than 0.1 mm, and the surface roughness is not less than 1.6.

[0019] Preferably, the retaining ring assembly is a split-petal structure, consisting of at least two petals.

[0020] Preferably, the flange is connected to the retaining ring assembly by screws.

[0021] Preferably, the flange is connected to the flange pressing plate by screws.

[0022] According to a method for manufacturing a composite cylinder with an integrally formed flange provided by the present invention, the composite cylinder forming mold with an integrally formed flange is used;

[0023] The following steps are also included:

[0024] Step 1: Winding the composite fiber on the mold core;

[0025] Step 2: Fold back the fiber at the end of the core and install the retaining ring assembly and flange;

[0026] Step 3: Flip the folded back composite fiber to the flange to reinforce the thickness of the composite fiber;

[0027] Step 4: Install the guard bar, flange pressure plate and heating sleeve, and pressurize and fix the flange.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] The present invention can realize the integral molding of the flange and the cylinder, giving full play to the advantage of high tensile strength of the fibers in the composite material, and because the flange and the composite cylinder are integrated, the connection strength between the two is high and not easy to be damaged, and can be applied to special working conditions requiring high interface strength between the flange and the composite cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0031] Figure 1 It is a structural schematic diagram of the present invention;

[0032] Figure 2 This is a structural schematic diagram of step 1 of the method for manufacturing a composite cylinder with an integrally formed flange in the present invention;

[0033] Figure 3 This is a structural schematic diagram of step 3 of the method for manufacturing a composite cylinder with an integrally formed flange in the present invention;

[0034] Figure 4 This is a structural schematic diagram of step 4 of the method for manufacturing a composite cylinder with an integrally formed flange in the present invention;

[0035] The figure shows:

[0036] DETAILED DESCRIPTION

[0037] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, for those of ordinary skill in the art, several changes and improvements can also be made without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0038] The present invention provides a composite cylinder forming mold with an integrally formed flange, comprising a clamping block 1, an extension rod 2, a shaft 3, a retaining ring assembly 4, a flange 5, an electric heating sleeve 6, a circumference bar 7, a flange pressing plate 8, a mold core 9 and a punching device; the clamping block 1 is connected to one end of the shaft 3 through the extension rod 2, specifically, the clamping block 1 is connected to one end of the extension rod 2 through a pin, and the other end of the extension rod 2 is connected to the shaft 3 through a flange structure and a fastener. The other end of the shaft 3 passes through the end of the mold core 9 and is connected to the inner cavity of the mold core 9, and the retaining ring assembly 4 is installed at the end of the mold core 9;

[0039] The flange 5 is sleeved on the mold core 9, one end face of the flange 5 is detachably connected to the retaining ring assembly 4, and the other end face of the flange 5 is against the root of the flange of the composite cylinder to be processed; the inner diameter of the circumference strip 7 and the flange pressing plate 8 is larger than the inner diameter of the mold core 9, and the circumference strip 7 and the flange pressing plate 8 are sleeved on the flange of the composite cylinder to be processed. The other end face of the flange 5 is also against one end face of the circumference strip 7, and the other end face of the circumference strip 7 is against the flange pressing plate 8; the electric heating sleeve 6 is sleeved on the circumference strip 7;

[0040] The electric heating sleeve 6 is sleeved on the surrounding strip 7; specifically, the flange 5 is connected to the retaining ring assembly 4 by screws. The flange 5 is connected to the flange pressing plate 8 by screws. The screws also penetrate the surrounding strip 7, so that the surrounding strip 7 is fixed between the flange 5 and the flange pressing plate 8.

[0041] The function of the surrounding strip 7 and the flange pressing plate 8 is to compact the flange of the composite material cylinder to be processed.

[0042] The punching device is used to punch holes in the flanged portion of the composite cylinder to be processed. The present invention can be understood as the integrally formed flange being the flange with the flanged portion as the flange plate, and the holes punched by the punching device being the bolt holes on the flange.

[0043] The retaining ring assembly 4 includes a retaining ring 41 and a plurality of equal-height blocks 42; an equal-height block 42 is provided between one end of the flange 5 and the retaining ring 41, and one end of the flange 5 is connected to the retaining ring 41 by screws. After assembly, the equal-height blocks are equal in height. In a preferred embodiment, the retaining ring assembly 4 is a petal structure, consisting of at least two petals. Specifically, the retaining ring 41 is a two-petal structure, including an upper petal and a lower petal, which can facilitate the retaining ring 41 to be mounted on the cylinder of the material to be processed by mutual embracing.

[0044] The main body of the mold core 9 is a tubular structure with a wall thickness of not less than 15 mm, a straightness of the mold core 9 of not less than 0.15 mm, a verticality of the end face of the mold core 9 of not less than 0.1, and a mold surface roughness of not less than 1.6;

[0045] The end face diameter of the mold core 9 is larger or smaller than the main body diameter of the mold core 9; the inner cavity of the mold core 9 is provided with a supporting structure, and the outer surface is provided with a demoulding slope; the whole is airtight.

[0046] The mold core 9 is made of metal, such as Q235.

[0047] The flange 5 is a split-petal structure, consisting of at least two petals. Preferably, the flange 5 is a two-petal structure, including an upper petal and a lower petal, which can facilitate the flange 5 to be mounted on the composite cylinder to be processed in a mutually embracing manner.

[0048] The parallelism of the left and right end surfaces of flange 5 shall not be less than 0.1 mm, and the surface roughness shall not be less than 1.6.

[0049] The present invention can realize the integrated molding of a fully composite cylinder with a flange through the combined assembly of the molding molds. The present invention adopts an assembly structure that is both independent and connected, which improves the assembly flexibility of the entire mold; and the mold core 9 and the flange 5 are both processed by a single part and assembled in a combined manner, which is portable and low in cost. In addition, the flange made by the present invention gives full play to the strength advantages of integrated molding and composite carbon fiber, so that the formed flange has a higher connection strength with the composite cylinder, is less prone to damage, and can be applied to a variety of working conditions.

[0050] The present invention also provides a method for manufacturing a composite cylinder with an integrally formed flange, using the composite cylinder forming mold with an integrally formed flange; and further comprising the following steps:

[0051] Step 1: Wind the composite fiber on the mold core 9 to a specified thickness as required. Preferably, the specified thickness is 5-10 mm. The requirement is: quasi-isotropic;

[0052] Step 2: Fold back the fibers within a certain range at the end of the mold core 9, and install the retaining ring assembly 4 and the flange 5, wherein the certain range is 100-500 mm;

[0053] Step 3: Flip the folded fiber to the flange and reinforce the fiber to the required thickness, which is 10-60 mm;

[0054] Step 4: Install the guard bar 7, flange pressure plate 8, and heating sleeve 6, and pressurize and fix the flange.

[0055] In the description of the present application, it should be understood that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0056] The above describes the specific embodiments of the present invention. It should be understood that the present invention is not limited to the above specific embodiments, and those skilled in the art can make various changes or modifications within the scope of the claims, which does not affect the essence of the present invention. In the absence of conflict, the embodiments of the present application and the features in the embodiments can be combined with each other arbitrarily.

Claims

1. A composite barrel forming mold with an integrally formed flange, characterized in that: It comprises a clamping block (1), an extension rod (2), a shaft (3), a retaining ring assembly (4), a flange (5), an electric heating sleeve (6), a surrounding strip (7), a flange pressing plate (8), a mold core (9) and a punching device; The clamping block (1) is connected to one end of the shaft (3) via the extension rod (2), and the other end of the shaft (3) passes through the end of the mold core (9) and is connected to the inner cavity of the mold core (9); The retaining ring assembly (4) is installed at the end of the mold core (9); The flange (5) is sleeved on the mold core (9), one end face of the flange (5) is detachably connected to the retaining ring assembly (4), and the other end face of the flange (5) abuts against the root of the flange of the composite material cylinder to be processed; The surrounding strip (7) and the flange pressing plate (8) are both mounted on the flange of the composite material cylinder to be processed, the other end face of the flange (5) is also against one end face of the surrounding strip (7), and the other end face of the surrounding strip (7) is against the flange pressing plate (8); the electric heating sleeve (6) is mounted on the surrounding strip (7); The punching device is used for punching holes in the flanged portion of the composite material cylinder to be processed.

2. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The retaining ring assembly (4) comprises a retaining ring (41) and a plurality of equal-height blocks (42); An equal height block (42) is provided between one end of the flange (5) and the retaining ring (41), and one end of the flange (5) is connected to the retaining ring (41) by means of screws.

3. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The main body of the mold core (9) is a tubular structure with a wall thickness of not less than 15 mm, a straightness of the mold core (9) of not less than 0.15 mm, a verticality of the end face of the mold core (9) of not less than 0.1, and a mold surface roughness of not less than 1.6; The end diameter of the mold core (9) is larger or smaller than the main body diameter of the mold core (9); The inner cavity of the mold core (9) is provided with a supporting structure, and the outer surface is provided with a demoulding slope.

4. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The mold core (9) is made of metal.

5. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The flange (5) is a petal structure, consisting of at least two petals.

6. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The parallelism of the left and right end surfaces of the flange (5) is not less than 0.1 mm, and the surface roughness is not less than 1.

6.

7. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The retaining ring assembly (4) is a petal structure, consisting of at least two petals.

8. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The flange (5) is connected to the retaining ring assembly (4) by means of screws.

9. The composite barrel forming mold with an integrally formed flange according to claim 1, characterized in that: The flange (5) is connected to the flange pressing plate (8) by means of screws.

10. A method for manufacturing a composite cylinder with an integrally formed flange, characterized in that: A composite cylinder forming mold with an integrally formed flange according to any one of claims 1 to 9; The following steps are also included: Step 1: Winding the composite fiber onto a mold core (9); Step 2: Fold back the fiber at the end of the mold core (9) and install the retaining ring assembly (4) and flange (5); Step 3: Fold the folded back composite fiber to the flange (5) to reinforce the thickness of the composite fiber; Step 4: Install the circumference strip (7), flange pressure plate (8) and heating sleeve (6), and pressurize and fix the flange.

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