CN114633496B

CN114633496B - Demolding device and method for integral molding tool of composite material cylinder section structure

Info

Publication number: CN114633496B
Application number: CN202210300015.4A
Authority: CN
Inventors: 王燕; 程文礼; 蒋金隆; 邱启艳
Original assignee: AVIC Composite Corp Ltd
Current assignee: AVIC Composite Corp Ltd
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2023-11-21
Anticipated expiration: 2042-03-25
Also published as: CN114633496A

Abstract

The invention belongs to the aerospace manufacturing technology, and particularly relates to a demolding device and method for an integral molding tool for a composite material cylinder section structure. The hydraulic rod is connected to drive the split forming tool to shrink so as to realize the integral demoulding of the combined tool, the cost is high, the split forming tool is difficult to move, and the simple demoulding cannot be realized. The demoulding bracket is provided with a clamping ring at the bottom and positioning devices distributed circumferentially at the top; the demoulding pull rod is an integrated rotary rod and a connecting block in the middle, two threaded rods are respectively arranged on two sides of the connecting block, threads of the two threaded rods are opposite in rotation direction, the outer end parts of the threaded rods are respectively connected with an inner threaded sleeve in a threaded manner, the outer end parts of the inner threaded sleeves are connectors, and the arc-shaped structure is pulled to demould by rotating the rotary rod. The demolding pull rod is simple to operate and low in cost, and can be applied to demolding of barrel section structure combination tools with different sizes and shapes. The cylinder section structure combination tool and the part are fixed through the demolding bracket, so that the safety of demolding operation is ensured.

Description

Demolding device and method for integral molding tool of composite material cylinder section structure

Technical Field

The invention belongs to the aerospace manufacturing technology, and particularly relates to a demolding device and method for an integral molding tool for a composite material cylinder section structure.

Background

At present, the composite material fuselage wallboard is mostly assembled by a plurality of wallboards in a combined way, a large number of metal pieces, fasteners and tools are required to be consumed, the labor cost is reduced, the number of parts, fasteners and tools can be greatly reduced by the integral forming technology of the fuselage section, the assembly is simplified, and the composite material fuselage wallboard is an important measure for reducing the weight of a composite material structure and is an effective method for reducing the cost.

However, the integral molding also puts higher requirements on the design of the die, and the barrel section structure adopts male die molding, and the integral molding is a cone structure, but partial stringers have larger distortion and the middle part of the stringers is broken, so that the tool cannot be demolded from a big end to a small end, and the split tool design is adopted. Because the split tool is arranged on the inner side of the wallboard of the composite material barrel section structure, the split tool can only be separated from the inner side, thereby realizing demoulding. How to realize the quick and simple demoulding of the split combined tool is one of key technologies for realizing the integral forming of the fuselage barrel section structure.

Currently, there are few reports on the integral formation of composite fuselage panels. CN 204340231U provides a hydraulic demoulding device for a barrel section structure integral forming tool, which consists of a hydraulic rod and a central main shaft, and the hydraulic rod is connected to drive a split forming tool to shrink so as to realize integral demoulding of the combined tool. But the drawing of patterns direction of this hydraulic pressure demolding device only is limited to "cross" direction, needs combination frock and hydraulic means to carry out accurate location and realizes the drawing of patterns, and hydraulic means weight is big, and is with high costs, and difficult removal can't realize simple and easy drawing of patterns.

Disclosure of Invention

Aiming at the problems of complex operation and high cost of a hydraulic demoulding device, the invention provides a demoulding device and a demoulding method of an integral forming tool for a composite material barrel section structure, which lay a technical foundation for realizing low-cost large-size full composite material machine body barrel section manufacture.

The invention provides a demoulding device of an integral forming tool of a composite material cylinder section structure, which is of a split combined tool structure and comprises a plurality of arc structures extending along the axial direction, wherein the arc structures are combined to form an integral male mould, the demoulding device comprises a demoulding bracket and a demoulding pull rod,

the demolding bracket is provided with a clamping ring at the bottom and positioning devices distributed circumferentially at the top, the bottom of the integral molding tool is clamped on the clamping ring, and the top of the integral molding tool is fixed on the positioning devices circumferentially;

the demolding pull rod is provided with a rotary rod and a connecting block which are integrated in the middle, two sides of the connecting block are respectively provided with a threaded rod, the threads of the two threaded rods are opposite in rotation direction, the outer end parts of the threaded rods are respectively in threaded connection with an internal threaded sleeve, and the outer end parts of the internal threaded sleeves are connectors which are connected with templates at the opposite positions in the integral molding tool; and the arc-shaped structure is pulled to be demolded by rotating the rotating rod.

Advantageously, the barrel section structure is a barrel section part of a fuselage section.

Advantageously, the demoulding support is of a double-layer frame structure, and is provided with a base, a support frame with an intermediate layer fixed on the base and a support frame which penetrates through the intermediate layer and is arranged in a ring shape, wherein the top of the support frame is provided with a ring-shaped frame, and a plurality of positioning devices are arranged on the ring-shaped frame.

Advantageously, the annular frame is of polygonal configuration.

Advantageously, the positioning means comprise a positioning block fixed to the annular frame, at the end of which is a bolt.

Advantageously, the large diameter end face of the integral forming tool is provided with a positioning hole, and the positioning hole is connected with the positioning device.

Advantageously, a shaping plate is arranged on the inner side of the arc-shaped structure of the integral forming tool, a demoulding hole is formed in the shaping plate, and connectors at two ends of the demoulding pull rod are connected with the opposite shaping plate.

The invention also provides a demolding method of the integral molding tool for the composite material cylinder section structure, which utilizes the demolding device and comprises the following steps:

s1, clamping the bottom of an integral forming tool on a clamping ring of a demoulding bracket;

s2, connecting the top of the integral forming tool with a positioning device for one circle;

s3, connecting and fixing connectors on two sides of the demolding pull rod with a template at the inner relative position of the integral molding tool;

s4, the positioning device in the same direction as the demolding pull rod is detached and connected with the integral molding tool;

s5, rotating the rotating rod to drive the template to move inwards, so that the two opposite arc structures are separated;

s6, repeating the steps S3-S5 to separate the rest arc structures, and realizing demolding.

The beneficial effects are that: compared with a hydraulic demolding device, the demolding pull rod is simple to operate and low in cost, and can be applied to demolding of barrel section structure combination tools with different sizes and shapes. The cylinder section structure combination tool and the part are fixed through the demolding bracket, so that the safety of demolding operation is ensured.

The features, functions, and advantages that have been discussed can be achieved independently in various examples or may be combined in yet other examples. Further details of the examples can be seen with reference to the following description and drawings.

Drawings

The illustrative examples, as well as a preferred mode of use, further objectives, and descriptions thereof, will best be understood by reference to the following detailed description of an example of the invention when read in conjunction with the accompanying drawings, wherein:

FIG. 1 is a top view of an integral forming tool mounted on a stripper apparatus;

FIG. 2 is a front view of an integral forming tool mounted on a stripper unit;

FIG. 3 is a schematic connection diagram of a stripper rod inside a forming tool;

FIG. 4 is a schematic structural view of a stripper stand;

FIG. 5 is a schematic view of a positioning device;

fig. 6 is a schematic view of the construction of the ejector pin.

Detailed Description

The disclosed examples will be described more fully with reference to the accompanying drawings, in which some, but not all of the disclosed examples are shown. Indeed, many different examples may be described and should not be construed as limited to the examples set forth herein. Rather, these examples are described so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Referring now to the embodiment shown in the drawings, the integral forming tool 1 of the composite material barrel section structure shown in fig. 1 is mounted on a demoulding bracket 3, and at the outer side surface of the integral forming tool 1 is a barrel section part 2. The integral forming tool 1 is a split combined tool structure and comprises a plurality of arc structures extending along the axial direction, wherein the embodiment in the figure is 8 segmented arc structures, and the split combined tool structure is an integral annular structure. The segmented arcuate structure has a locating hole 17 in the large diameter end face and a plurality of arcuate templates 16 in the interior and stripper holes 18 in the templates 16.

The demolding device comprises a demolding bracket 3 and a demolding pull rod 4. The lower right of the demoulding bracket 3 at least comprises a base 7, a clamping ring 6, a supporting frame 10 and a positioning device 5. Wherein the positioning means 5 comprise a positioning block 8 and a bolt 9.

The demoulding pull rod 4 comprises a rotary rod 15 and a connecting block 14 which are integrated in the middle, threaded rods 13 are arranged on two sides of the connecting block 14, the outer end parts of the threaded rods 13 are in threaded connection with the internal thread sleeve 12, the thread directions of the two ends are opposite, and the outer end parts of the internal thread sleeve 12 are connectors. The connector 11 is connected and fixed with the template 16 of the combined tool 1 through bolts and nuts. The external threads of the threaded rods 13 on the two sides are opposite in direction, the threaded rods 13 are driven to rotate by manually rotating the rotating rods 15, so that the inner threaded sleeve 12 is pulled inwards to realize the shrinkage of the demolding pull rod 4 in length, and the integral molding tool 1 components in a pair of directions are separated.

The demolding method of the integral molding tool for the composite material barrel section structure of an embodiment comprises the following implementation processes:

(1) The integral forming tool 1 is integrally arranged in a clamping ring 6 at the upper part of a base 7 of the demoulding bracket 3;

(2) The integral forming tool 1 is fixed by utilizing a positioning device 5 at the top of a demoulding bracket 3 and a clamping ring 6 at the bottom, wherein a positioning block 8 in the positioning device 5 is connected and fixed with the large-diameter end face of the barrel section forming tool 1 at the end part through a bolt 9;

(3) The opposite shaping plate 16 is connected and fixed with the connector 11 of the demoulding pull rod 4 through bolts and nuts in the diameter direction;

(4) In the direction parallel to the demoulding pull rod 4 of the integral forming tool 1, disassembling the bolt and the nut of the large-diameter end part of the integral forming tool 1 and the positioning device 5;

(5) The rotary rod 15 is manually rotated to drive the threaded rods 13 on two sides to rotate, so that the demoulding pull rod 4 is contracted, and two opposite segmented arc structures connected with the demoulding pull rod 4 are separated;

(6) Repeating the steps (3) - (5) to separate the rest segmented arc structures, so as to realize the demolding of the barrel segment structure.

In some cases, components of the devices and/or systems may be configured to perform functions such that the components are actually configured and constructed (using hardware and/or software) to enable such performance. In other examples, components of the apparatus and/or system may be arranged to be suitable, capable, or adapted to perform functions, such as when operated in a particular manner. The method may include one or more operations, functions, or actions as illustrated by one or more of the blocks. While the blocks are illustrated sequentially, the blocks may also be performed in parallel and/or in a different order than described herein. Additionally, the various blocks may be combined into fewer blocks, divided into additional blocks, and/or removed based on a desired implementation.

The description of the different advantageous arrangements has been presented for purposes of illustration and description, but is not intended to be exhaustive or limited to the examples in the form disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art. Additionally, the different advantageous examples may describe different advantages compared to other advantageous examples. The example or examples selected are chosen and described in order to best explain the principles of the examples, the practical application, and to enable others of ordinary skill in the art to understand the disclosure for various examples with various modifications as are suited to the particular use contemplated.

Claims

1. The utility model provides a shedder of combined material section of thick bamboo structure integral molding frock, this integral molding frock (1) is components of a whole that can function independently combination formula frock structure, including a plurality of arc structures along axial extension, constitute whole positive mould after the arc structure combination, have locating hole (17) on the big footpath terminal surface of integral molding frock (1), have template (16) in a plurality of positions of the arc structure inboard of integral molding frock (1), have on template (16) and take off moulding hole (18), its characterized in that: the demoulding device comprises a demoulding bracket (3) and a demoulding pull rod (4),

the demolding support (3) is of a double-layer frame type structure and is provided with a base (7), a supporting frame of an intermediate layer and a supporting frame (10) which penetrates through the intermediate layer are fixed on the base (7), the top of the supporting frame (10) is provided with an annular frame, a plurality of positioning devices (5) are circumferentially arranged on the annular frame, a clamping ring (6) is arranged on the base (7), the positioning devices (5) comprise positioning blocks (8) fixed on the annular frame, bolts (9) are arranged at the end parts of the positioning blocks (8), the bottoms of the integral molding tools (1) are clamped on the clamping ring (6), and positioning holes (17) at the top are circumferentially fixed on the positioning blocks (8) of the positioning devices (5);

the demolding pull rod (4) is provided with a rotary rod (15) and a connecting block (14) which are integrated in the middle, two sides of the connecting block (14) are respectively provided with a threaded rod (13), the threads of the two threaded rods (13) are opposite in rotation direction, the outer end parts of the threaded rods (13) are respectively in threaded connection with an internal threaded sleeve (12), the outer end parts of the internal threaded sleeves (12) are connectors (11), and the connectors are connected with demolding holes (18) of a template (16) at the inner opposite positions of the integral molding tool (1); and the arc-shaped structure is pulled to be demolded by rotating the rotating rod (15).

2. The demolding device according to claim 1, characterized in that: the barrel section structure is a barrel section part (2) of the fuselage section.

3. The demolding device according to claim 1, characterized in that: the annular frame is of a polygonal structure.

4. A demolding method of an integral molding tool for a composite material cylinder section structure is characterized by comprising the following steps of: the method using the demolding device as claimed in any one of claims 1 to 3, comprising the steps of:

s1, clamping the bottom of an integral forming tool (1) on a clamping ring (6) of a demoulding bracket (3);

s2, connecting the top of the integral forming tool (1) with a positioning device (5) for one circle;

s3, connecting and fixing connectors (11) at two sides of the demolding pull rod (4) with a template (16) at the inner opposite position of the integral molding tool (1);

s4, disassembling the connection between the positioning device (5) and the integral forming tool (1) in the same direction as the demoulding pull rod (4);

s5, rotating the rotating rod (15) to drive the template (16) to move inwards, so that the two opposite arc structures are separated;