An aircraft nose skin forming die and a forming method thereof

Abstract

An aircraft nose fuselage skin forming die and a forming method thereof belong to the field of aircraft skin forming. The aircraft nose fuselage skin forming die comprises a bottom plate, two side plates, a rotating device, a top plate and a limiting device. The upper ends of the bottom plate are symmetrically fixedly connected with the two side plates, and the upper ends of the side plates are fixedly connected with the top plate. The rotating device is fixedly connected with the upper end of the bottom plate. The limiting device is movably connected with the rotating device. The aircraft nose fuselage skin forming die can not only turn over the rotating die, move the corresponding dies on different sides of the rotating die to the working position, make one rotating die manufacture multiple different state skins, save the floor area, and make two skins be processed and formed at one time through the up-down reciprocating movement of the hydraulic cylinder, thereby improving the working efficiency.

Description

Technical Field

[0001] This invention relates to a molding die for aircraft front fuselage skin and its molding method, belonging to the field of aircraft skin molding. Background Technology

[0002] Currently used aircraft skin forming equipment typically uses molds that are fixed in a certain position during operation. The skin is moved downwards by the equipment on both sides that fix the skin, so that it comes into contact with the mold. This type of equipment is inefficient. Moreover, the manufacturing process of aircraft fuselage skin requires the use of multiple molds to ensure that the skin meets the requirements of the fuselage. However, when there are many different types of molds, they will occupy a large area. Therefore, it is necessary to improve the equipment. Summary of the Invention

[0003] The purpose of this invention is to solve the aforementioned problems in the background art by providing an aircraft forward fuselage skin molding die and its molding method.

[0004] The present invention achieves the above objectives by adopting the following technical solution:

[0005] A molding die for forming the front fuselage skin of an aircraft includes a base plate, two side plates, a rotating device, a top plate, and a limiting device; the upper end of the base plate is symmetrically and fixedly connected to two side plates, and the upper end of the side plates is fixedly connected to the top plate; the rotating device is fixedly connected to the upper end of the base plate; and the limiting device is movably connected to the rotating device.

[0006] A molding method for an aircraft forward fuselage skin molding die, the molding method comprising the following steps:

[0007] Step 1: Start the motor. The motor drives the rotating mold to rotate, and rotate the corresponding raised arc surface on the rotating mold to the upper and lower ends.

[0008] Step 2: Rotate the mold to drive the movable template to rotate together via the connecting block;

[0009] Step 3: Place the skin into the gap between the lower end of the slide plate and the rectangular hole, and start the hydraulic cylinder to drive the slide plate and rotate the mold to move downwards;

[0010] Step 4: While the skateboard is moving downwards, place another sheet of material into the gap between the top of the skateboard and the rectangular hole. After the hydraulic cylinder drives the rotating mold to the bottom, start the hydraulic cylinder in the opposite direction.

[0011] Compared with the prior art, the beneficial effects of the present invention are: the present invention can not only flip the rotating mold, so that the molds corresponding to different sides of the rotating mold can be moved to the working position, so that one rotating mold can manufacture skins in a variety of different states, thereby saving floor space, but also the hydraulic cylinder can process two skins into shape by moving up and down once, thereby improving work efficiency. Attached Figure Description

[0012] Figure 1 This is a front view of an aircraft forward fuselage skin forming mold according to the present invention;

[0013] Figure 2 This is a side view of an aircraft forward fuselage skin forming mold according to the present invention;

[0014] Figure 3 This is a front view of the side panel of an aircraft forward fuselage skin forming mold according to the present invention;

[0015] Figure 4 This is a side view of a side plate of an aircraft forward fuselage skin molding mold according to the present invention;

[0016] Figure 5 This is a schematic diagram showing the position of the slide rail in an aircraft forward fuselage skin forming mold according to the present invention;

[0017] Figure 6 This is a schematic diagram of the slide plate structure of an aircraft front fuselage skin forming mold according to the present invention;

[0018] Figure 7 This is a schematic diagram showing the position of the connecting rod in a mold for forming the front fuselage skin of an aircraft according to the present invention;

[0019] Figure 8 This is a front view of a rotating device for forming a mold for the front fuselage skin of an aircraft according to the present invention;

[0020] Figure 9 This is a side view of a rotating device for forming a mold for the front fuselage skin of an aircraft according to the present invention;

[0021] Figure 10 This is a front view of a limiting device for an aircraft forward fuselage skin forming mold according to the present invention;

[0022] Figure 11 This is a side view of a limiting device for an aircraft front fuselage skin forming mold according to the present invention. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the invention, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0024] Specific implementation method one: as follows Figure 1-11 As shown, this embodiment describes a molding die for forming the front fuselage skin of an aircraft, including a base plate 1, two side plates 2, a rotating device 3, a top plate 4, and a limiting device 5; the upper end of the base plate 1 is symmetrically and fixedly connected to two side plates 2, and the upper end of the side plates 2 is fixedly connected to the top plate 4; the rotating device 3 is fixedly connected to the upper end of the base plate 1; the limiting device 5 is movably connected to the rotating device 3.

[0025] A rectangular hole 22 is provided in the middle of the side plate 2. A slide rail 29 is provided on the inner wall of the rectangular hole 22. A rectangular slide plate 21 is provided inside the rectangular hole 22. A slider that slides in cooperation with the slide rail 29 is fixedly connected to the side of the slide plate 21, so that the slide plate 21 can slide up and down in the rectangular hole 22.

[0026] The rotating device 3 includes a hydraulic cylinder 31, a connecting shaft 32, a connecting block 33, a slide rod I 34, a spring I 35, a movable template 37, a motor 38, a rotating mold 39, and a connecting rod 310. Two hydraulic cylinders 31 are symmetrically fixedly connected to the upper end of the base plate 1. Two vertical plates 11 are also symmetrically fixedly connected to the upper end of the base plate 1. Vertical grooves 12 are provided on the vertical plates 11. One end of the connecting shaft 32 is connected to the side of the movable end of the hydraulic cylinder 31 via a bearing, and the other end of the connecting shaft 32 passes through the vertical groove 12 and is fixedly connected to the connecting block 33. Two connecting blocks 33 are fixedly connected. On both sides of the rotating mold 39, each of the connecting blocks 33 has four sliding grooves 36 evenly distributed. Each sliding groove 36 has a sliding rod I 34 that slides with it. One end of the sliding rod I 34 is fixedly connected to the inner wall of the corresponding sliding groove 36 with a spring I 35. The other end of the sliding rod I 34 is fixedly connected to a movable template 37. The motor 38 is fixedly connected to the side of the movable end of one of the hydraulic cylinders 31, and the output shaft of the motor 38 passes through the movable end of the hydraulic cylinder 31 and is fixedly connected to the connecting shaft 32. The side of the movable end of the hydraulic cylinder 31 is also fixedly connected to a connecting rod 310, and the other end of the connecting rod 310 is fixedly connected to the slide plate 22.

[0027] The rotating mold 39 is a quadrangular prism, and the four sides of the rotating mold 39 are provided with outwardly protruding arc surfaces.

[0028] The curvature of any two adjacent side protrusions of the rotating mold 39 is the same. The curvature of two opposite side protrusions of the rotating mold 39 can be the same or different. When the curvatures of opposite side protrusions are the same, a single up-and-down movement of the hydraulic cylinder 31 can produce two identical skins; conversely, two different skins can be produced.

[0029] The movable template 37 is arc-shaped, and the arc of the movable template 37 is the same as that of the convex arc surface on the side of the corresponding rotating mold 39.

[0030] The spring I35 is always in a compressed state.

[0031] The limiting device 5 includes multiple limiting rods 51, T-shaped sliders 52, connecting plates 53, and connecting rods 54; the lower end of the top plate 4 is provided with a T-shaped groove 41, the T-shaped sliders 52 slide in cooperation with the T-shaped grooves 41, the T-shaped sliders 52 are fixedly connected to the upper end of the connecting plate 53, the lower end of the connecting plate 53 is connected to the connecting rod 54 by a hinge, the lower end of the connecting rod 54 is connected to the upper part of the movable end of the hydraulic cylinder 31 by a hinge, and multiple limiting rods 51 are also fixedly connected to the side of the connecting plate 53, the limiting rods 51 are located above the rotating mold 39.

[0032] The upper and lower surfaces of the slide plate 21 are provided with holes 27, and vertical rods 24 are provided in the holes 27 for sliding cooperation. A spring II 28 is fixedly connected between the holes 27 and the vertical rods 24. A roller 23 is connected to the end of the vertical rods 24 away from the slide plate 21. The top and bottom of the outer side of the slide plate 21 are connected to a rotating block 25 by a spring hinge, and the other end of the rotating block 25 is fixedly connected to a ramp 26.

[0033] A molding method for an aircraft forward fuselage skin molding die, the molding method comprising the following steps:

[0034] Step 1: Start motor 38. Motor 38 drives rotating mold 39 to rotate, and rotate the corresponding raised arc surface on the rotating mold 39 to the upper and lower ends.

[0035] Step 2: Rotate the mold 39 to drive the movable template 37 to rotate together via the connecting block 33;

[0036] Step 3: Place the skin into the gap between the lower end of the slide plate 21 and the rectangular hole 22, and start the hydraulic cylinder 31 to drive the slide plate 21 and the rotating mold 39 to move downwards;

[0037] Step 4: While the slide plate 21 moves downward, place another sheet of skin into the gap between the upper end of the slide plate 21 and the rectangular hole 22. After the hydraulic cylinder 31 drives the rotating mold 39 to move to the bottom, start the hydraulic cylinder 31 in the opposite direction.

[0038] The working principle of this invention is as follows: When using this device, the rotating mold 39 is moved to its highest position by the hydraulic cylinder 31, and then the motor 38 is started. The motor 38 drives the connecting block 33 to rotate through the connecting shaft 32, thereby driving the rotating mold 39 to rotate, and rotating the side of the corresponding convex arc surface on the rotating mold 39 to the desired position. Figure 2 The upper and lower ends of the state shown;

[0039] As the connecting block 33 rotates, the connecting block 33 drives the vertical rod 34 to rotate together through the hole 36. The vertical rod 34 drives the movable template 37 to rotate together with the rotating mold 39, which in turn drives the movable template 37 corresponding to the raised arc surface on the side of the rotating mold 39 to rotate together.

[0040] When the gap between the lower end of the slide plate 21 and the rectangular hole 22 is at its maximum, the skin is placed in the gap between the lower end of the slide plate 21 and the rectangular hole 22. Then, the hydraulic cylinder 31 is activated to drive the slide plate 21 downward through the connecting rod 310. At the same time, the hydraulic cylinder 31 drives the rotating mold 39 downward through the connecting shaft 32. During the downward movement of the slide plate 21, the roller 23 contacts the skin first. As the slide plate 21 continues to move downward, the vertical rod 24 compresses the spring II 28. When the skin is not placed correctly, one side of the skin will protrude from the outer end of the side plate 2. As the slide plate 21 continues to move downward, the inclined plate 26 will contact the skin protruding from the outer end of the side plate 2. After the slide plate 21 moves downward, the inclined plate 26... The inner inclined surface pushes the skin inward to fine-tune and correct its position, avoiding material waste due to operational errors. When the rotating block 25 moves with the slide plate 21 and contacts the outer wall of the side plate 2, the rotating mold 39 moves to the lowest point. At the same time, the rotating mold 39 drives the lower end face of the skin to press against the upper end face of the movable template 37, and fixes the shape of the skin by the pressure between the rotating mold 39 and the movable template 37, thus forming it. During the retraction of the hydraulic cylinder 31, the movable end of the hydraulic cylinder 31 also drives the connecting rod 54 to move. The connecting rod 54 drives the connecting plate 53 to move in the direction of the rotating mold 39, thereby driving the limit rod 51 to move above the rotating mold 39.

[0041] As the slide plate 21 moves downwards, another sheet is placed into the gap between the upper end of the slide plate 21 and the rectangular hole 22, with the middle position of the sheet positioned above the limit rod 51. This reduces the risk of the upper sheet moving with the rotating mold 39, causing continuous position changes and affecting subsequent processing. Then, the hydraulic cylinder 31 is activated in reverse, and the sheet above the rotating mold 39 is formed according to the above operation. When the hydraulic cylinder 31 is extended, the connecting rod 54 moves, causing the connecting plate 53 to move away from the rotating mold 39. The width of the rectangular hole 22 remains the same to prevent the sheet from being moved when the limit rod 51 moves. Figure 1In the indicated state, the device moves left and right, thereby causing the limiting rod 51 to disengage from the top of the rotating mold 39, thus avoiding affecting the skin forming. At the same time, after the rotating mold 39 moves to the top, the limiting rod 51 can prevent the rotating mold 39 from being affected by the rotation when the motor 38 drives it to rotate. Meanwhile, as the rotating mold 39 moves upward, the gap between the lower end of the slide plate 21 and the bottom wall of the rectangular hole 22 continuously increases, allowing the operator to remove the skin formed below the rotating mold 39. When the rotating mold 39 moves downward, the skin formed above the rotating mold 39 can be removed. By moving up and down once, two skins can be formed, thus speeding up the work.

Claims

1. A molding die for forming the forward fuselage skin of an aircraft, characterized in that: It includes a base plate (1), two side plates (2), a rotating device (3), a top plate (4), and a limiting device (5); the upper end of the base plate (1) is symmetrically and fixedly connected to two side plates (2), and the upper end of the side plates (2) is fixedly connected to the top plate (4); the rotating device (3) is fixedly connected to the upper end of the base plate (1); the limiting device (5) is movably connected to the rotating device (3); The side plate (2) has a rectangular hole (22) in the middle. The inner wall of the rectangular hole (22) has a slide rail (29), and the inside of the rectangular hole (22) has a rectangular slide plate (21). The side of the slide plate (21) is fixedly connected to a slider that slides with the slide rail (29) so that the slide plate (21) can slide up and down in the rectangular hole (22). The rotating device (3) includes a hydraulic cylinder (31), a connecting shaft (32), a connecting block (33), a slide rod I (34), a spring I (35), a movable template (37), a motor (38), a rotating mold (39), and a connecting rod (310); there are two hydraulic cylinders (31), which are symmetrically fixedly connected to the upper end of the base plate (1). The upper end of the base plate (1) is also symmetrically fixedly connected to two vertical plates (11). The vertical plates (11) are provided with vertical grooves (12). One end of the connecting shaft (32) is connected to the side of the movable end of the hydraulic cylinder (31) through a bearing. The other end of the connecting shaft (32) passes through the vertical groove (12) and is fixedly connected to the connecting block (33); there are two connecting blocks (33), which are symmetrically fixedly connected to the upper end of the base plate (1). The connecting block (33) is fixedly connected to both sides of the rotating mold (39); each connecting block (33) has four slide grooves (36) evenly distributed on it, and each slide groove (36) is provided with a slide rod I (34) that slides with it. One end of the slide rod I (34) is fixedly connected to the inner wall of the corresponding slide groove (36) with a spring I (35), and the other end of the slide rod I (34) is fixedly connected to a movable template (37); the motor (38) is fixedly connected to the side of the movable end of one of the hydraulic cylinders (31), and the output shaft of the motor (38) passes through the movable end of the hydraulic cylinder (31) and is fixedly connected to the connecting shaft (32); the side of the movable end of the hydraulic cylinder (31) is also fixedly connected to a connecting rod (310), and the other end of the connecting rod (310) is fixedly connected to the slide plate (21); The limiting device (5) includes multiple limiting rods (51), a T-shaped slider (52), a connecting plate (53), and a connecting rod (54); the lower end of the top plate (4) is provided with a T-shaped groove (41), the T-shaped slider (52) slides in cooperation with the T-shaped groove (41), the T-shaped slider (52) is fixedly connected to the upper end of the connecting plate (53), the lower end of the connecting plate (53) is connected to the connecting rod (54) by a hinge, the lower end of the connecting rod (54) is connected to the upper end of the movable end of the hydraulic cylinder (31) by a hinge, and multiple limiting rods (51) are also fixedly connected to the side of the connecting plate (53), the limiting rods (51) are located above the rotating mold (39); The upper and lower surfaces of the slide plate (21) are provided with holes (27), and vertical rods (24) that slide with the holes (27) are provided in the holes (27). A spring II (28) is fixedly connected between the holes (27) and the vertical rods (24). A roller (23) is connected to the end of the vertical rods (24) away from the slide plate (21). The top and bottom surfaces of the outer side of the slide plate (21) are connected to a rotating block (25) by a spring hinge. The other end of the rotating block (25) is fixedly connected to a ramp (26).

2. The aircraft forward fuselage skin forming mold according to claim 1, characterized in that: The rotating mold (39) is a quadrangular prism, and the four sides of the rotating mold (39) are provided with outwardly protruding arc surfaces.

3. The aircraft forward fuselage skin forming mold according to claim 2, characterized in that: The curvature of any two adjacent side protrusions of the rotating mold (39) is the same.

4. The aircraft forward fuselage skin forming mold according to claim 3, characterized in that: The movable template (37) is set to be arc-shaped, and the arc of the movable template (37) is the same as that of the convex arc surface on the side of the corresponding rotating mold (39).

5. The aircraft forward fuselage skin forming mold according to claim 4, characterized in that: The spring I (35) is always in a compressed state.

6. The forming method of the aircraft forward fuselage skin forming mold according to claim 5, characterized in that: The molding method includes the following steps: Step 1: Start the motor (38). The motor (38) drives the rotating mold (39) to rotate, and rotate the corresponding raised arc surface on the rotating mold (39) to the upper and lower ends. Step 2: Rotate the mold (39) to drive the movable template (37) to rotate together via the connecting block (33); Step 3: Place the skin into the gap between the lower end of the slide plate (21) and the rectangular hole (22), and start the hydraulic cylinder (31) to drive the slide plate (21) and the rotating mold (39) to move downward; Step 4: While the slide plate (21) moves downward, place another sheet of skin into the gap between the upper end of the slide plate (21) and the rectangular hole (22). After the hydraulic cylinder (31) drives the rotating mold (39) to move to the bottom, start the hydraulic cylinder (31) in the opposite direction.

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