Open hollow composite part demolding tool and method of use thereof

Abstract

The application discloses an open hollow composite part demolding tool and a use method thereof. The open hollow composite part is formed on a combined die body to form a combined body to be demolded. The combined die body is installed on a bag making platform. The inner surface of the open hollow composite part has an inner recess and / or an inner convex component. The tool comprises: a turnover hoisting frame for hoisting the combined body to a set demolding station, the turnover hoisting frame being connected with the bag making platform; a plurality of fixed clamping plates for limiting the relative position between the combined body and the turnover hoisting frame; and a demolding support for supporting the combined body in the demolding station and separating the combined die body from the open hollow composite part according to a set demolding sequence. The tool has a simple structure and is convenient to operate. The demolding efficiency of the open hollow composite part with the inner recess and / or the inner convex component can be greatly improved, and the damage to the appearance of the finished product caused by the demolding operation can be reduced.

Description

Technical Field

[0001] This invention belongs to the field of demolding tooling technology, specifically relating to a demolding tooling for open hollow composite parts and its usage method. Background Technology

[0002] Composite materials, with their advantages of lightweight, high modulus, high strength, designability, high temperature resistance, excellent thermal stability, fatigue resistance, corrosion resistance, and good processability, are ideally suited for aerospace vehicle structures with extreme requirements for load-bearing capacity and lightweight design. The high strength, high modulus, high temperature resistance, and lightweight properties of composite materials have long been utilized in the aerospace field. With the continuous development of composite material technology, its application level and scope in the aerospace field have been continuously improving and expanding. Currently, it basically covers all structures in aircraft, missiles, rockets, satellites, and spacecraft systems, including load-bearing structures, secondary structures, heat-resistant (heat-proof) structures, and other functional structures. Simultaneously, with the continuous development of aerospace technology and the deepening of its exploration areas, the demand for advanced composite materials is also increasing.

[0003] Hollow composite materials with concave or convex internal components are a common type of structure in aerospace vehicles. Demolding of hollow composite materials with concave or convex internal components after molding has always been a challenge in the industry, especially for larger parts. Demolding is difficult and requires specialized tooling. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a demolding fixture for open hollow composite parts and its usage method. The fixture has a simple structure, is easy to operate, and can significantly improve the demolding efficiency of open hollow composite parts with concave and / or convex components, while reducing damage to the appearance of the finished product during demolding.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, a demolding fixture is provided for an open hollow composite material, wherein the open hollow composite material is formed on a combined mold body to form an assembly to be demolded, the combined mold body is mounted on a bag-making platform, and the inner surface of the open hollow composite material has concave and / or convex components. The fixture includes: a flipping lifting frame for hoisting the assembly to a set demolding position, the flipping lifting frame being connected to the bag-making platform; a plurality of fixing plates for defining the relative position between the assembly and the flipping lifting frame; and a demolding bracket for supporting the assembly at the demolding position, the demolding bracket also being used to separate the combined mold body from the open hollow composite material according to a set demolding sequence.

[0006] Furthermore, the fixing plate includes: a plurality of fixing ends connected to the flipping hoisting frame; and a supporting end that matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material.

[0007] Furthermore, the tilting and hoisting frame is equipped with several universal lifting rings.

[0008] Furthermore, the tilting and hoisting frame is a cuboid structure assembled from several columns and beams.

[0009] Furthermore, the demolding bracket is provided with: a plurality of support units for supporting the assembly; a limiting unit for limiting the assembly mold; and a demolding unit for removing the first mold body from the open hollow composite material; wherein the inner surface of the open hollow composite material corresponding to the profile of the first mold body has no concave or convex components.

[0010] Further, each of the support units includes: a support plate that matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material; a plate slot for mounting the support plate; a guide rod connected at one end to the plate slot; a guide sleeve connected at one end to the demolding bracket; the other end of the guide rod being slidably connected to the other end of the guide sleeve; and a drive mechanism connected to the plate slot for driving the support plate closer to or away from the open hollow composite material, the drive mechanism being mounted on the demolding bracket.

[0011] Furthermore, the limiting unit includes a limiting fixing frame, one side of which is connected to the demolding bracket, and the other side is connected to the second mold body in the combined mold body; wherein, the inner surface of the open hollow composite material corresponding to the profile of the second mold body is provided with concave and / or convex components.

[0012] Furthermore, the demolding unit includes: a lead screw, one end of which is connected to the first mold body via a connecting seat; and a lead screw nut that is drivenly connected to the lead screw, the lead screw nut being mounted on the demolding bracket via a lead screw support.

[0013] Secondly, a method for using a demolding fixture for open-face hollow composite parts is provided. The fixture is the demolding fixture for open-face hollow composite parts described in the first aspect. The method includes: installing a flip-lifting frame on a bag-making platform and using a fixing plate to define the relative position between the assembly and the flip-lifting frame; lifting the assembly to a set demolding position using the flip-lifting frame and placing it on the demolding bracket; then removing the flip-lifting frame and the bag-making platform; and separating the assembly from the open-face hollow composite parts on the demolding bracket according to a set demolding sequence.

[0014] Further, separating the combined mold body from the open hollow composite material part according to the set demolding sequence includes: adjusting the support unit to support the combined body; connecting the limiting unit to limit the second mold body in the combined mold body; connecting the demolding unit to the first mold body in the combined mold body, and pulling the first mold body out of the open hollow composite material part through the demolding unit; adjusting the support unit to separate the support unit from the combined body, and then separating the open hollow composite material part from the second mold body, thereby completing the demolding of the open hollow composite material part; wherein, the inner surface of the open hollow composite material part corresponding to the profile of the first mold body has no concave or convex members; the inner surface of the open hollow composite material part corresponding to the profile of the second mold body is provided with concave and / or convex members.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: The present invention provides a flipping lifting frame for hoisting the assembly to a set demolding position; a fixing plate for limiting the relative position between the assembly and the flipping lifting frame; and a demolding bracket for supporting the assembly at the demolding position, which is also used to separate the assembly from the open hollow composite material part according to a set demolding sequence. The overall tooling structure is simple and easy to operate, and it can significantly improve the demolding efficiency of open hollow composite material parts with concave and / or convex components, while reducing the damage to the appearance of the finished product during demolding. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the flipping and lifting frame in a demolding fixture for open hollow composite parts provided in an embodiment of the present invention; wherein, (a) is the state after the flipping and lifting frame is connected to the fixed plate and the bag making platform; (b) is the state when the combined mold, the open hollow composite part and the bag making platform are lifted by the flipping and lifting frame; Figure 2 This is a schematic diagram of how the flip-lifting frame lifts the combined mold, the open hollow composite material part, and the bag making platform to the demolding station and places them on the demolding bracket in an embodiment of the present invention; Figure 3 yes Figure 2 A schematic diagram showing the state after the flip-over lifting frame and bag-making platform have been removed; Figure 4 This is a schematic diagram showing the connection status of the support unit, limiting unit, and demolding unit on the demolding bracket with the combined mold body. Figure 5 This is a schematic diagram showing the state in which the demolding unit extracts the first mold body from the open hollow composite material part; Figure 6 This is a schematic diagram of the open hollow composite material part after it has been separated from the second mold body; In the diagram: 1. Combined mold body; 2. Bag making platform; 3. Tilting and lifting frame; 4. Fixed plate; 5. Universal lifting ring; 6. Demolding bracket; 7. Limiting and fixing frame; 8. Support plate; 9. Plate slot; 10. Turbine screw jack; 11. Guide rod; 12. Guide sleeve; 13. Connecting seat; 14. Screw; 15. Screw support; 16. Screw nut. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and should not be used to limit the scope of protection of the present invention.

[0018] Example 1: like Figures 1-6 As shown, a demolding fixture for an open-faced hollow composite material is provided. The open-faced hollow composite material is formed on a combined mold body 1 to form a composite body to be demolded. The combined mold body 1 is mounted on a bag-making platform 2. The inner surface of the open-faced hollow composite material has concave and / or convex components. The fixture includes: The flipping lifting frame 3 is used to lift the assembly to the set demolding station. The flipping lifting frame 3 is connected to the bag making platform 2. Several fixing plates 4 are used to define the relative position between the assembly and the flipping hoisting frame 3; The demolding bracket 6 is used to support the assembly at the demolding station. The demolding bracket 6 is also used to separate the combined mold body 1 from the open hollow composite material part according to the set demolding sequence.

[0019] The fixed plate 4 includes: several fixed ends connected to the flipping and lifting frame 3; and a support end that matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material.

[0020] Several universal lifting rings 5 ​​are provided on the tilting and hoisting frame 3.

[0021] The tilting and hoisting frame 3 is a cuboid structure assembled from several columns and beams.

[0022] The demolding bracket 6 is provided with: several support units for supporting the assembly; a limiting unit for limiting the assembly mold 1; and a demolding unit for removing the first mold body in the assembly mold 1 from the open hollow composite material; wherein the inner surface of the open hollow composite material corresponding to the profile of the first mold body has no concave or convex components.

[0023] Each support unit includes: a support plate 8 that matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material; a plate slot 9 for mounting the support plate 8; a guide rod 11 connected at one end to the plate slot 9; a guide sleeve 12 connected at one end to the demolding bracket 6; the other end of the guide rod 11 slidably connected to the other end of the guide sleeve 12; and a drive mechanism connected to the plate slot 9 for driving the support plate 8 closer to or away from the open hollow composite material, the drive mechanism being mounted on the demolding bracket 6. In this invention, the drive mechanism is a screw jack 10.

[0024] The limiting unit includes a limiting fixing frame 7, one side of which is connected to the demolding bracket 6, and the other side is connected to the second mold body in the combined mold body 1; wherein, the inner surface of the open hollow composite material corresponding to the profile of the second mold body is provided with concave and / or convex components.

[0025] The demolding unit includes: a lead screw 14 and a lead screw nut 16 that is connected to the lead screw 14 in a transmission manner; one end of the lead screw 14 is connected to the first mold body through a connecting seat 13; the lead screw nut 16 is mounted on the demolding bracket 6 through a lead screw support 15.

[0026] like Figure 1 As shown, after the open hollow composite material part is cured and formed, the vertically placed mold and the part are flipped to a horizontal state by a flipping lifting device composed of a combined mold body 1, a bag making platform 2, a flipping and lifting frame 3, a fixing plate 4, and a universal lifting ring 5.

[0027] like Figure 2 As shown, the horizontal mold and parts are hoisted onto the support plate 8 of the tooling, and each support plate is adjusted to a suitable height so that its surface completely fits the support parts and bears the force evenly.

[0028] like Figure 3 As shown, remove the fixing pins and screws between the combined mold 1 and the bag-making platform 2; remove the fixing screws between the two plates below the fixing plate 4 and the tilting and lifting frame 3. Remove the bag-making platform 2, the tilting and lifting frame 3, the fixing plate 4, and the universal lifting ring 5.

[0029] like Figure 4As shown, one side of the limiting and fixing bracket 7 is fixedly connected to the demolding bracket 6 by screws, and the other side is connected to the lower half of the combined mold body 1 (second mold body); the lead screw support 15 is installed at the end of the demolding bracket 6 by screws, and the lead screw 14 and the lead screw nut 16 are screwed together by trapezoidal threads. Then, the lead screw nut 16 is inserted into the limiting slot of the lead screw support 15 and can rotate freely in the slot. When the lead screw nut 16 rotates, the lead screw 14 moves axially through thread engagement. The front end of the lead screw 14 is connected to the connecting seat 13 by a fork-ear hinge through a pin. At the same time, the connecting seat 13 is fixedly connected to the upper part of the combined mold body 1 (first mold body) by screws.

[0030] like Figure 5 As shown, rotating the screw nut 16 causes the screw 14 to move axially. The movement of the screw 14 simultaneously drives the front connecting seat 13 to move, thereby moving the upper part of the combined mold body 1. During the movement of the upper part of the combined mold body 1, the lower part of the combined mold body 1 and the part are constrained and fixed by the demolding bracket 6, the limiting and fixing bracket 7, the support plate 8, etc., so that the upper part and the lower part of the combined mold body 1 are separated and released from the inner cavity of the open hollow composite material part. After being released from the combined mold body 1, the large end of the upper part of the combined mold body 1 is directly installed with a universal lifting ring, and the small end of the upper part of the combined mold body 1 is lifted and removed after installing the mold body lifting plate (not shown in the figure).

[0031] like Figure 6 As shown, after the upper half of the combined mold body 1 is demolded, a large cavity space is formed inside the part. The large end of the lower half of the combined mold body 1 is connected and locked with the limiting and fixing frame of the tooling. At this time, by rotating the handwheel of the worm gear screw jack 10, it drives the clamping plate groove 9, the supporting clamping plate 8 and the part to lower the height, thereby completely separating the protruding and recessed areas of the open hollow composite part with concave and convex components from the lower half of the combined mold body 1. Then, the part is axially moved out of the gap between the lower half of the combined mold body 1 and the supporting clamping plate 8 to remove it from the frame, and finally the open hollow composite part with concave and convex components is obtained.

[0032] In this invention, the first mold body is characterized by having no concave or convex components on the inner surface of the open hollow composite material corresponding to its profile. The second mold body is characterized by having concave and / or convex components on the inner surface of the open hollow composite material corresponding to its profile. For ease of description, the combined mold body 1 in this invention consists of two parts: a first mold body (the upper half of the combined mold body 1) and a second mold body (the lower half of the combined mold body 1). In practical applications, both the first and second mold bodies can be assembled from multiple sub-mold bodies according to the structural characteristics of the open hollow composite material.

[0033] The demolding fixture for open hollow composite parts in this invention meets the demolding requirements of open hollow composite parts with concave and convex internal components. The limiting and fixing frame, support plate, lead screw, etc. of the fixture are all connected to the demolding bracket with screws and can be disassembled and assembled as needed.

[0034] The upper part of the combined mold body 1 is pulled out mechanically by the engagement of the lead screw 14 and the lead screw nut 16 with the trapezoidal thread. The demolding speed is uniform and controllable, and the demolding force is balanced and reliable. After the upper part of the combined mold body 1 is demolded, the handwheel of the worm gear screw jack can be turned to easily separate the lower part of the combined mold body 1 from the raised and recessed areas of the part.

[0035] This invention can adapt to the demolding of open hollow composite parts with concave and convex components of different sizes within a certain range by replacing support plates of different sizes and shapes. The tooling is easy to assemble and disassemble, and the operation is simple and convenient. It requires low operator skill and greatly reduces the labor intensity of operators.

[0036] This invention utilizes simple machined parts and standard components, resulting in a simple and compact overall structure that is easy to install and maintain, has low manufacturing costs, and is reliable in operation. It is widely used in the demolding process after molding open hollow composite parts.

[0037] Example 2: Based on the demolding fixture for open hollow composite parts described in Embodiment 1, this embodiment provides a method for using the demolding fixture for open hollow composite parts, including: The flipping and lifting frame 3 is installed on the bag making platform 2, and the relative position between the assembly and the flipping and lifting frame 3 is defined by the fixing plate 4; The assembly is lifted to the designated demolding station by flipping the lifting frame 3 and placed on the demolding bracket 6. Then, the flipping lifting frame 3 and the bag making platform 2 are removed. On the demolding bracket 6, the combined mold body 1 is separated from the open hollow composite material part according to the set demolding sequence, including: Adjust the support units to support the assembly; Connect the limiting unit to limit the second module in the combined module 1; The demolding unit is connected to the first mold body in the combined mold body 1, and the first mold body is extracted from the open hollow composite material through the demolding unit; Adjust the support unit to separate the support unit from the assembly, and then separate the open hollow composite material from the second mold body to complete the demolding of the open hollow composite material. Among them, the inner surface of the open hollow composite material corresponding to the surface of the first mold body has no concave or convex components; The inner surface of the open hollow composite material part corresponding to the surface of the second mold body is provided with concave and / or convex components.

[0038] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A demolding fixture for open hollow composite parts, characterized in that, The open hollow composite material is formed on the combined mold body (1) to form a composite body to be demolded. The combined mold body (1) is installed on the bag making platform (2). The inner surface of the open hollow composite material has concave and / or convex components. The tooling includes: A flip-up lifting frame (3) is used to lift the assembly to a set demolding station, and the flip-up lifting frame (3) is connected to the bag making platform (2); Several fixing plates (4) are used to define the relative position between the assembly and the flipping hoisting frame (3); The demolding bracket (6) is used to support the assembly at the demolding station. The demolding bracket (6) is also used to separate the combined mold body (1) from the open hollow composite material part according to the set demolding sequence. The demolding bracket (6) is provided with: Several support units for supporting the assembly; A limiting unit for limiting the position of the combined module (1); A demolding unit for removing the first mold body in the combined mold body (1) from the open hollow composite material; wherein the inner surface of the open hollow composite material corresponding to the profile of the first mold body has no concave or convex components. Each of the support units includes: A support plate (8) that matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material. A slot (9) for mounting the support plate (8); A guide rod (11) with one end connected to the card slot (9); A guide sleeve (12) is connected at one end to the demolding bracket (6); The other end of the guide rod (11) is slidably connected to the other end of the guide sleeve (12); A drive mechanism connected to the card slot (9) for driving the support card (8) to move closer to or away from the open hollow composite material, the drive mechanism being mounted on the demolding bracket (6); The limiting unit includes a limiting fixing frame (7), one side of which is connected to the demolding bracket (6), and the other side is connected to the second mold body in the combined mold body (1); wherein, the inner surface of the open hollow composite material corresponding to the profile of the second mold body is provided with concave and / or convex components.

2. The demolding fixture for open hollow composite parts according to claim 1, characterized in that, The fixing plate (4) includes: Several fixed ends connected to the tilting and hoisting frame (3); The support end matches the outer surface contour of the open hollow composite material and abuts against the outer surface of the open hollow composite material.

3. The demolding fixture for open hollow composite parts according to claim 1, characterized in that, The flipping hoisting frame (3) is equipped with several universal lifting rings (5).

4. The demolding fixture for open hollow composite parts according to claim 1, characterized in that, The flipping hoisting frame (3) is a cuboid structure spliced ​​together from several columns and beams.

5. The demolding fixture for open hollow composite parts according to claim 1, characterized in that, The demolding unit includes: A lead screw (14), one end of which is connected to the first mold body via a connecting seat (13); A screw nut (16) is connected to the screw (14) for transmission, and the screw nut (16) is mounted on the demolding bracket (6) through a screw support (15).

6. A method for using a demolding fixture for open hollow composite parts, characterized in that, The tooling is the demolding tooling for open hollow composite parts as described in any one of claims 1 to 5, and the method includes: The flip-lifting frame (3) is installed on the bag-making platform (2), and the relative position between the assembly and the flip-lifting frame (3) is defined by the fixing plate (4); The assembly is lifted to the set demolding station by flipping the lifting frame (3) and placed on the demolding bracket (6). Then, the flipping lifting frame (3) and the bag making platform (2) are removed. On the demolding bracket (6), the combined mold body (1) and the open hollow composite material are separated according to the set demolding sequence.

7. The method of using the demolding fixture for open hollow composite parts according to claim 6, characterized in that, Separate the combined mold body (1) from the open hollow composite material part according to the set demolding sequence, including: Adjust the support unit to support the assembly; Connect the limiting unit to limit the second module in the combined module (1); The demolding unit is connected to the first mold body in the combined mold body (1), and the first mold body is extracted from the open hollow composite material through the demolding unit; Adjust the support unit to separate the support unit from the assembly, and then separate the open hollow composite material from the second mold body to complete the demolding of the open hollow composite material. Among them, the inner surface of the open hollow composite material corresponding to the shape surface of the first mold body has no concave or convex components; The inner surface of the open hollow composite material corresponding to the surface of the second mold body is provided with concave and / or convex components.

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