Ultra-large honeycomb sandwich cylinder section forming tool

Abstract

The utility model discloses an ultra-large honeycomb sandwich cylinder section forming tool which comprises a die bracket and a forming male die, the forming male die is of a hollow cylinder structure, and reinforcing ribs are arranged on the inner wall of the forming male die; a central component force connecting rod is further arranged in the forming male die, hollow end covers are arranged at the two ends of the forming male die, the middles of the hollow end covers are fixed to the central component force connecting rod, and outer rings are fixed to the forming male die; and one end of the central component force connecting rod is connected with the rotating motor, and the other end of the central component force connecting rod is clamped on the driven wheel group. The forming male die is arranged to be of a hollow cylinder structure, the overall weight of the die is greatly reduced, and the reinforcing ribs are arranged on the inner wall of the forming male die to increase the strength of the forming male die; the center component force connecting rod is arranged in the forming male die, the gravity of the forming male die is shared to the center component force connecting rod through the hollowed-out end face, the weight of the die is reduced, and meanwhile the rigidity of the die does not deform.

Description

Technical Field

[0001] The utility model relates to the technical field of composite material forming molds, and particularly relates to a forming tooling for an extra-large honeycomb sandwich cylinder section. Background Art

[0002] The extra-large honeycomb sandwich cylinder section is a composite material part used for the main structure of an aircraft, such as an aircraft fuselage, a rocket cylinder, a missile shell, etc. The existing cylinder structure generally adopts a split forming method, that is, two semi-cylindrical bodies are formed first, and then the cylinder is assembled and connected. The honeycomb structure is generally only locally strengthened, so that the overall strength of the cylinder is much weaker than that of the integral forming.

[0003] On the contrary, the cylinder section structure mold is also designed with a split structure. The mold with a split structure has low overall strength, and there are many connecting devices and strengthening structures inside, so the overall weight is very heavy, which also makes the mold cost and manufacturing cost relatively high. Content of the Utility Model

[0004] In order to solve the above problems, the utility model provides a forming tooling for an extra-large honeycomb sandwich cylinder section, which can integrally form the cylinder section, improve the strength of the cylinder section, and reduce its own weight and cost.

[0005] Therefore, the technical solution of the utility model is: a forming tooling for an extra-large honeycomb sandwich cylinder section, including a mold bracket and a forming male mold. The forming male mold is of a hollow cylindrical structure, and reinforcing ribs are arranged on the inner wall; a central force dividing connecting rod is further arranged inside the forming male mold. Hollow end covers are arranged at both ends of the forming male mold. The middle of the hollow end cover is fixed on the central force dividing connecting rod, and the outer ring is fixed on the forming male mold; both ends of the central force dividing connecting rod are mounted on the mold bracket, one end is connected to a rotating motor, and the other end is stuck on a driven wheel set.

[0006] On the basis of the above solution and as the preferred solution of the above solution: a convex platform is arranged on the side surface of the forming male mold. The convex platform is fixed on the forming male mold through bolts, and a sealing ring is arranged between the two.

[0007] On the basis of the above solution and as the preferred solution of the above solution: a jackscrew platform is arranged inside the forming male mold, and the jackscrew platform is opposite to the position of the convex platform. [[ID=********]]

[0008] On the basis of the above solution and as the preferred solution of the above solution: the axial spacing of the reinforcing ribs on the inner wall of the forming male mold is 300 - 500 mm, the circumferential spacing of the reinforcing ribs is 200 - 400 mm, and the height is 200 - 300 mm.

[0009] On the basis of the above solution and as the preferred solution of the above solution: the central force dividing connecting rod is hollow inside, and the wall thickness is 15 - 30 mm.

[0010] On the basis of the above solution and as an optimized solution of the above solution: the forming male mold is made of steel structure, and its wall thickness is 10-15 mm.

[0011] On the basis of the above solution and as an optimized solution of the above solution: a honeycomb baffle is provided at each end of the outer circumference of the forming male mold.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. The forming male mold is set as a hollow cylinder structure, which greatly reduces the overall weight of the mold, and reinforcing ribs are arranged on the inner wall of the forming male mold to increase the strength of the forming male mold.

[0014] 2. A central force dividing link is arranged inside the forming male mold, and the self-gravity of the forming male mold is distributed to the central force dividing link through the hollow end face, reducing the weight of the mold while keeping the stiffness of the mold unchanged and not deformed.

[0015] 3. A detachable boss is arranged in the middle of the forming male mold for reserving a position for installing a general cover assembly. A sealing ring is arranged between the boss and the forming male mold to ensure airtightness. A jackscrew platform is designed inside the forming male mold, which can jack up the boss inside. After being jacked up, it is ensured that the boss will not interfere with demolding. Description of the Drawings

[0016] Figure 1 、 Figure 2 is a structural schematic diagram of the present utility model;

[0017] Figure 3 is a structural schematic diagram of the forming male mold of the present utility model;

[0018] Figure 4 is an internal structural schematic diagram of the forming male mold of the present utility model.

[0019] The marks in the figure are: mold bracket 1, chassis 11, support frame 12, forming male mold 2, driven wheel set 3, rotating motor 4, reinforcing rib 5, central force dividing link 6, hollow end cover 7, honeycomb baffle 8, boss 9. Detailed Embodiments

[0020] In the description of the present utility model, it should be noted that for orientation terms, such as the terms "center", "lateral (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the indicated orientation and positional relationship are based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and should not be construed as limiting the specific protection scope of the present utility model.

[0021] In addition, such terms as "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of technical features. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meanings of "several" and "a number of" are two or more, unless otherwise specifically defined.

[0022] Referring to the drawings. The ultra-large honeycomb sandwich cylinder section forming tooling described in this embodiment includes a die bracket 1 and a forming male die 2. The die bracket 1 includes a bottom frame 11 and support frames 12 on both sides. The bottom frame 11 is a hollow steel frame structure. A driven wheel set 3 for support is provided at the top of the support frame 12, and a rotating motor 4 is installed on one of the support frames.

[0023] The material of the forming male die 2 is steel, including but not limited to Q235, 45# steel, etc. The forming male die 2 is a hollow cylinder structure, and the wall thickness of the forming male die is 12 mm. Reinforcing ribs 5 are provided on the inner wall of the forming male die 2. The axial spacing of the reinforcing ribs 5 is 300 - 500 mm, preferably 400 mm. The circumferential spacing of the reinforcing ribs 5 is 200 - 400 mm, preferably 320 mm, and the height is 200 - 300 mm, preferably 260 mm. The reinforcing ribs 5 are welded to the inner wall of the forming male die 2. The reinforcing ribs 5 are designed for a certain weight reduction and strength improvement, and the weight can be reduced through a hollow structure on the reinforcing ribs 5.

[0024] The self-weight of the forming male die 2 is about 19T. Under the same strength condition, the self-weight of the split combined die is about 25 - 30T, and the weight is reduced by about 24 - 36% compared with the split combined die.

[0025] Inside the forming male mold 2, there is also a central force dividing connecting rod 6. The central force dividing connecting rod 6 is hollow inside, with a wall thickness of 15 - 30 mm, preferably 20 mm, and an external dimension of 4m * 8m * 5m. At both ends of the forming male mold 2, there are hollow end covers 7. The middle of the hollow end covers 7 is fixed on the central force dividing connecting rod 6, and the outer ring is fixed on the forming male mold 2. The hollow end covers 7 distribute the self - weight of the forming male mold 2 to the central force dividing connecting rod 6, and the central force dividing connecting rod 6 must ensure its own stiffness to prevent deformation. Both ends of the central force dividing connecting rod 6 are placed on the support frames 12 of the mold bracket 1 and are respectively stuck on the driven wheel sets 3. One end is connected to a rotating motor 4, and the rotating motor 4 can drive the central force dividing connecting rod 6 to drive the forming male mold 2 to rotate, facilitating the laying of composite materials.

[0026] At both ends of the outer circumference of the forming male mold 2, there is a ring of honeycomb edge guards 8 for honeycomb anti - side pressure and reserved assembly gaps. On the side of the forming male mold 2, there is a boss 9 for reserving a position for installing a general access cover assembly. There is an airtightness requirement between the boss 9 and the forming male mold 2. The boss 9 is fixed on the forming male mold 2 by bolts, and a sealing ring is arranged between the boss 9 and the forming male mold 2 to ensure airtightness. A jackscrew platform is designed inside the forming male mold to jack up the boss inside. After jacking up, it is ensured that the boss will not interfere with demolding.

[0027] During use, the forming male mold 2 is placed on the mold bracket 1, and both ends are respectively stuck on the driven wheel sets 3. One end is connected to a rotating motor 4. The bottom of the mold bracket 1 is a hollow steel frame, and the bottom of the steel frame is a horizontal base, and the horizontal base is fixed on the ground.

[0028] During laying, the access cover assembly is connected to the forming male mold by bolts and undergoes an airtightness test. It can be used only after passing the test. During demolding, the access cover assembly is lifted by jackscrews to ensure smooth demolding.

[0029] The above - mentioned is only the preferred embodiment of the present invention. The protection scope of the present invention is not limited to the above - mentioned embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A forming tool for a super-large honeycomb sandwich cylinder section, comprising a die bracket and a forming male die, characterized in that: The forming male mold is a hollow cylindrical structure with reinforcing ribs provided on the inner wall; a central force dividing connecting rod is further provided inside the forming male mold, and hollow end caps are provided at both ends of the forming male mold. The middle of the hollow end caps is fixed on the central force dividing connecting rod, and the outer ring is fixed on the forming male mold; both ends of the central force dividing connecting rod are mounted on the mold bracket, one end is connected to the rotating motor, and the other end is stuck on the driven wheel set.

2. The super-large honeycomb sandwich cylinder section forming tooling according to claim 1, characterized in that: A boss is provided on the side of the forming male mold. The boss is fixed on the forming male mold by bolts, and a sealing ring is provided between the two.

3. The super-large honeycomb sandwich cylinder section forming tooling according to claim 2, characterized in that: A jackscrew platform is provided inside the forming male mold, and the jackscrew platform is opposite to the position of the boss.

4. The super-large honeycomb sandwich cylinder section forming tooling according to claim 1, characterized in that: The axial pitch of the reinforcing ribs on the inner wall of the forming male mold is 300 - 500 mm, the circumferential pitch of the reinforcing ribs is 200 - 400 mm, and the height is 200 - 300 mm.

5. The forming tooling for a super-large honeycomb sandwich cylinder section according to claim 1, wherein: The inside of the central force dividing connecting rod is hollow, and the wall thickness is 15 - 30 mm.

6. The super-large honeycomb sandwich cylinder section forming tooling according to claim 1, characterized in that: The forming male mold is made of steel structure, and its wall thickness is 10 - 15 mm.

7. The super-large honeycomb sandwich cylinder section forming tooling according to claim 1, wherein: A honeycomb edge guard is provided at each end of the outer circumference of the forming male mold.

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