Manufacturing method and mold of butt joint truss

Abstract

The invention provides a manufacturing method of a butt joint girder and a mold, and relates to the field of mold forming. The manufacturing method of the butt joint girder comprises the steps that a first material block is provided; paving the first material block on a first paving area and / or a second paving area of a blank paving mold; the first paving area and the second paving area are both L-shaped paving areas, and the L-shaped paving areas are areas formed between the upper surface of a mold base of the blank paving mold and the side face of a baffle located on the mold base. The baffle plate is formed by splicing a plurality of baffle blocks; n layers of second material blocks are laid on the first laying area and / or the second laying area where the first material blocks are laid according to different preset laying layer angles in sequence, and a target blank piece is obtained; n is an integer greater than or equal to 1; and curing treatment is conducted on the target blank piece, and a butt joint girder finished product piece is obtained. According to the scheme, rapid forming of the butt joist is achieved, the manufacturing efficiency is improved, and the production cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of mold forming, and in particular to a manufacturing method and a mold for a butt-jointed beam. Background Art

[0002] In the aerospace field, docking girders are mainly used for connecting rocket fairings with other structures. In the manufacturing process, existing docking girders are usually manufactured using a mold with an L-shaped lamination cavity with a mold specification of 8000mm×2500mm×575mm and a weight of 8.5 tons. However, this mold has the following disadvantages during use: the mold occupies a large area, which is not convenient for mold storage; the mold is large and heavy and is very inconvenient to transport; when the product is laid, the middle part of the mold is far away from the edge of the mold, and the operator needs to lie on the mold to operate, which is not convenient for the operator to operate and the work efficiency is very low; when the product is solidified, it occupies a large space in the autoclave, and the heating and cooling rates are low, the energy consumption is high, and the overall utilization rate of the mold is low, and the mold cost is high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a method and a mold for manufacturing a butt-jointed beam, thereby solving the problems of high manufacturing cost and low manufacturing efficiency in the existing butt-jointed beam production process.

[0004] In order to solve the above technical problems, the technical solution of the present invention is as follows:

[0005] An embodiment of the present invention provides a method for manufacturing a butt-jointed truss, comprising:

[0006] Providing a first material block;

[0007] Laying the first material block on the first paving area and / or the second paving area of ​​the blank paving mold; the first paving area and the second paving area are both L-shaped paving areas, and the L-shaped paving area is the area formed between the upper surface of the mold base of the blank paving mold and the side of the baffle located on the mold base; the baffle is formed by splicing a plurality of block blocks;

[0008] On the first paving area and / or the second paving area where the first material block is paved, N layers of the second material block are paved in sequence according to different preset paving angles to obtain a target blank; N is an integer greater than or equal to 1;

[0009] The target roughcast part is solidified to obtain a butt-jointed girder finished part.

[0010] Optionally, after paving the first material block on the first paving area and / or the second paving area of ​​the blank paving mold, the method further includes:

[0011] After laying a non-porous isolation film and a breathable felt on the first laying area and / or the second laying area where the first material block is laid, vacuum sealing and compaction are performed.

[0012] Optionally, vacuum sealing and compaction is performed, including:

[0013] At the corner position of the L-shaped paving area, the non-porous isolation membrane, the breathable felt and the first material block are vacuum-sealed and compacted according to the compaction margin.

[0014] Optionally, on the first paving area and / or the second paving area where the first material block is paved, N layers of the second material block are paved in sequence according to different preset ply angles to obtain a target blank, including:

[0015] In the rounded triangle area at the corner position of the first paving area and / or the second paving area where the first material block is paved, unidirectional carbon fiber prepreg is used for twisting and filling;

[0016] On the first paving area and / or the second paving area filled with twisted yarns, N layers of second material blocks are paved in sequence according to different preset ply angles to obtain a target blank.

[0017] Optionally, laying N layers of the second material block at different preset laying angles in sequence to obtain a target blank, including:

[0018] The second material block of the i+1th layer and the second material block of the i+3th layer are laid at a first preset angle, and during laying, the second material block of the current layer is connected with the second material block by a butt joint;

[0019] The second material block of the i+2th layer and the second material block of the i+4th layer are laid at a second preset angle;

[0020] During paving, the second material blocks of the current layer are connected with the second material blocks by docking until the second material blocks of the N-1th layer and the second material blocks of the Nth layer are all paved to obtain the target blank, wherein the second preset angle is different from the first preset angle, and i is a positive integer between 1 and N.

[0021] Optionally, after paving the second material block of the i-th layer, the method further includes:

[0022] The intermediate blank obtained after paving the i-th layer of the second material block is subjected to vacuuming and compacting at least once, and the vacuuming and compacting time is greater than or equal to a preset time length.

[0023] Optionally, during the paving process from the first layer to the Nth layer, the paving wrinkle position of the first material block or the second material block is cut and opened, and the cutting opening positions of the material blocks of two adjacent layers are overlapped, and the overlap amount at the cutting opening ranges from 15 mm to 20 mm.

[0024] An embodiment of the present invention further provides a manufacturing mold for a butt-jointed beam, comprising:

[0025] Mould base;

[0026] A baffle formed on the mold base, wherein the baffle is formed by splicing a plurality of baffles to form a plate;

[0027] A first paving area is formed between the first side surface of the baffle and the upper surface of the mold base; a second paving area is formed between the second side surface of the baffle and the upper surface of the mold base; the first paving area and the second paving area are both L-shaped paving areas;

[0028] Wherein, the target blank is obtained by paving the first material block in the first paving area and / or the second paving area of ​​the blank paving mold, and paving N layers of the second material block in sequence according to different preset laying angles on the first paving area and / or the second paving area where the first material block is laid; N is an integer greater than or equal to 1; and the target blank is cured to obtain a butt-jointed truss finished part.

[0029] Optionally, the shape of the baffle matches the shape of the butt-jointed girder finished part.

[0030] The above solution of the present invention includes at least the following beneficial effects:

[0031] The manufacturing method of the butt joint beam of the present invention comprises the following steps: providing a first material block; laying the first material block on the first laying area and / or the second laying area of ​​the blank laying mold; the first laying area and the second laying area are both L-shaped laying areas, and the L-shaped laying area is the area formed between the upper surface of the mold base of the blank laying mold and the side of the baffle located on the mold base; the baffle is formed by splicing a plurality of baffles; laying N layers of the second material block in the first laying area and / or the second laying area where the first material block is laid in sequence according to different preset laying angles to obtain a target blank; N is an integer greater than or equal to 1; curing the target blank to obtain a butt joint beam finished product. . Rapid prototyping of the butt joint beam is achieved, and at the same time, the mold width is small, which is convenient for convenient operation during product laying, the small footprint is convenient for mold storage, and the space occupied by the autoclave is small, and the heating and cooling rates are fast, thereby improving the manufacturing efficiency and reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is a flow chart of a method for manufacturing a butt-jointed beam of the present invention;

[0033] Figure 2It is a structural schematic diagram of a blank paving mold in the method for manufacturing a butt-jointed truss of the present invention;

[0034] Figure 3 yes Figure 2 A magnified view at point A;

[0035] Figure 4 It is a structural schematic diagram of a stopper in the method for manufacturing a butt-jointed girders of the present invention;

[0036] Figure 5 It is a structural schematic diagram of a finished butt-jointed girder in the manufacturing method of the butt-jointed girder of the present invention;

[0037] Figure 6 It is a partial enlarged view of a finished product of a butt-jointed girders in the manufacturing method of the butt-jointed girders of the present invention;

[0038] Among them, 1. mold base; 11. first paving area; 12. forklift hole; 13. transport wheel; 2. baffle; 21. block; 3. lifting fixing ring; 4. rounded triangle area. DETAILED DESCRIPTION

[0039] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present invention and to enable the scope of the present invention to be fully communicated to those skilled in the art.

[0040] like Figures 1 to 6 As shown, an embodiment of the present invention provides a method for manufacturing a butt-jointed truss, comprising:

[0041] Step 111, providing a first material block;

[0042] Step 112, laying the first material block on the first laying area and / or the second laying area of ​​the blank laying mold; the first laying area and the second laying area are both L-shaped laying areas, and the L-shaped laying area is the area formed between the upper surface of the mold base 1 of the blank laying mold and the side of the baffle 2 located on the mold base 1; the baffle 2 is formed by splicing a plurality of stop blocks 21;

[0043] Step 113, laying N layers of second material blocks in sequence according to different preset laying angles on the first laying area and / or the second laying area where the first material blocks are laid, to obtain a target blank; N is an integer greater than or equal to 1.

[0044] Step 114, curing the target roughcast part to obtain a butt-jointed truss finished part

[0045] In this embodiment, the blank paving mold comprises: a mold base 1, a first paving line is arranged on the end surface of the mold base 1; a baffle 2 formed by a plurality of stoppers 21 spliced ​​and arranged on the end surface of the mold base 1 in sequence, a second paving line is arranged on one side of each stopper 2, and the area enclosed by the first paving line and the second paving line is the first paving area or the second paving area, and the shape is L-shaped; during the production process, the planes of the docking beam products of the blank paving mold are opposite, and the mirror images are arranged on both sides of the baffle 2; the size of the blank paving mold is 60mm long×350mm wide×1000mm high, and the mold weighs 1 ton;

[0046] The manufacturing method of the butt-jointed beam of the present invention solves the problems of high manufacturing cost and low manufacturing efficiency in the existing butt-jointed beam production process by simultaneously performing the laying molding process in multiple laying areas on the blank laying mold. The butt-jointed beam is rapidly molded, and the mold width is small, which is convenient for convenient operation during product laying, and the small footprint is convenient for mold storage, and the space occupied by the autoclave is small, and the heating and cooling rates are fast, thereby improving the manufacturing efficiency and reducing the production cost.

[0047] In an optional embodiment of the present invention, after paving the first material block on the first paving area and / or the second paving area of ​​the blank paving mold, the method further includes:

[0048] After laying a non-porous isolation film and a breathable felt on the first laying area and / or the second laying area where the first material block is laid, vacuum sealing and compaction are performed.

[0049] Carry out vacuum sealing and compaction, including:

[0050] At the corner position of the L-shaped paving area, the non-porous isolation membrane, the breathable felt and the first material block are vacuum-sealed and compacted according to the compaction margin.

[0051] In this embodiment, taking the target blank part requiring paving of 20 layers of blocks as an example, the first block is used to pave the first layer, and the second to nineteenth layers are used to pave the second blocks; when paving each layer of blocks, when the current layer uses multiple blocks, the blocks of the current layer are overlapped or butted when paving;

[0052] In a preferred embodiment, the first layer and the twentieth layer are overlapped and laid, and the second to nineteenth layers are butt-laid; when the material blocks are overlapped, the overlap amount is less than 10 mm; when the material blocks are butt-laid, the staggered distance between the butt openings of the upper and lower layers is greater than 25 mm.

[0053] In this embodiment, the first material block and the second material block are both FP300 / IS1801 prepreg, i.e., composite materials;

[0054] When paving, firstly compare the first material block with the paving lines of the first paving area and / or the second paving area, and then pave the paving area on the mold base 1. When paving to the angle between the mold base 1 and the baffle 2, turn the first material block to the vertical surface, and pave the paving area on the baffle 2;

[0055] Taking the paving of the first paving area as an example, firstly, the first material block is compared with the edge line of the first paving area, i.e., the paving line, and then the paving area on the mold base 1 is paved first. When paving reaches the angle between the mold base 1 and the baffle 2, the first material block is turned over to the vertical surface, and the paving area on the baffle 2 is paved based on the paving line of the paving area on the baffle 2.

[0056] During the paving process, multiple first material blocks can be used for paving in an overlapping manner, preferably 3 first material blocks; at the same time, during the paving process, when it is impossible to pave the entire sheet or wrinkles appear in the paving process, an appropriate opening along 45° can be made at the position, and the opening position can be overlapped naturally with an overlap amount of 15-20mm. At the same time, it is necessary to compact and fit the mold to avoid bridging of the prepreg; after the first layer of prepreg is paved, non-porous isolation film and breathable felt are laid in sequence, and the sealing strips and vacuum bag film are used to cover them, and then the vacuum bags are sealed and compacted; when laying auxiliary materials, pay attention to avoid overhead, reserve compaction margin at the corners, and the vacuum compaction time should be no less than 15 minutes.

[0057] In an optional embodiment of the present invention, N layers of second material blocks are laid in sequence according to different preset laying angles on the first laying area and / or the second laying area where the first material blocks are laid to obtain a target blank, including:

[0058] In the rounded triangle area at the corner position of the first paving area and / or the second paving area where the first material block is paved, unidirectional carbon fiber prepreg is used for twisting and filling;

[0059] On the first paving area and / or the second paving area filled with twisted yarns, N layers of second material blocks are paved in sequence according to different preset ply angles to obtain a target blank.

[0060] In this embodiment, the rounded triangle area is as follows Figure 6 As shown in the reference numeral 4, it is located at the connection between the upper surface of the mold base 1 and the baffle 2; in this embodiment, N is 19 layers; before paving, the rounded triangle area 4 can be first filled with twisted wire using a 300mm long and 6mm wide UD700 / IS1801 unidirectional carbon fiber prepreg unidirectional tape, and the filling width is 24mm. After the 9th layer is paved, the rounded triangle area 4 is supplemented with unidirectional tape again, and the filling width is 18mm. The total width of the unidirectional tape used to fill the rounded corners is 42mm. During the filling process, the corners of each layer of prepreg need to be compacted to avoid bridging.

[0061] In an optional embodiment of the present invention, N layers of second material blocks are laid in sequence according to different preset laying angles to obtain a target blank, including:

[0062] The second material block of the i+1th layer and the second material block of the i+3th layer are laid at a first preset angle, and during laying, the second material block of the current layer is connected with the second material block by a butt joint;

[0063] The second material blocks of the i+2th layer and the second material blocks of the i+4th layer are laid at a second preset angle. During laying, the second material blocks of the current layer are connected to the second material blocks by means of a large connection, until the second material blocks of the N-1th layer and the second material blocks of the Nth layer are laid to obtain a target blank. The second preset angle is different from the first preset angle, and i is a positive integer between 1 and N.

[0064] In this embodiment, when performing multi-layer paving processing, the paving angles of the upper and lower layers of material blocks are staggered in sequence. Preferably, the first preset paving angle is 45 degrees, and the second paving angle is 0 degrees. The staggered paving design can improve the strength of the molded product after paving.

[0065] In the following, it is taken as an example that the target blank needs to lay 20 layers of blocks, and the specific laying angle of each layer of prepreg is shown in the laying sequence table of Table 1;

[0066] Table 1, Laying order table

[0067]

[0068]

[0069] In this embodiment, when performing multi-layer paving, vacuum compaction is performed after every 8-10 layers and the last layer. Each compaction time is not less than 15 minutes. After the compaction is completed, the paving status is checked, and the surface is required to be flat, wrinkle-free, and without fiber bridging. The wrinkled area can be ironed flat before continuing with paving.

[0070] In an optional embodiment of the present invention, after paving the i-th layer of second material blocks, the method further comprises:

[0071] The intermediate blank obtained after paving the i-th layer of the second material block is subjected to vacuuming and compacting at least once, and the vacuuming and compacting time is greater than or equal to a preset time length.

[0072] In an optional embodiment of the present invention, during the paving process of the first layer to the Nth layer, the paving wrinkle position of the first material block or the second material block is cut and opened, and the cutting opening positions of the material blocks of two adjacent layers are overlapped, and the overlap amount at the cutting openings is in the range of 15 mm to 20 mm.

[0073] In an optional embodiment of the present invention, when the target blank is solidified to obtain a butt-jointed girder finished product, the target blank needs to be de-edged first, specifically, based on the paving lines of the first paving area and / or the second paving area, the target blank is cut until it is flush with the paving lines, and then the cut blank is solidified to obtain a butt-jointed girder finished product.

[0074] like Figures 2 to 6 As shown, an embodiment of the present invention further provides a manufacturing mold for a butt-jointed truss, comprising:

[0075] Mould base 1;

[0076] A baffle formed on the mold base 1, wherein the baffle is formed by splicing a plurality of baffles 2 to form a plate;

[0077] A first paving area 11 is formed between the first side surface of the baffle and the upper surface of the mold base 1; a second paving area 12 is formed between the second side surface of the baffle and the upper surface of the mold base 1; the first paving area and the second paving area are both L-shaped paving areas;

[0078] Wherein, the target blank is obtained by paving the first material block in the first paving area and / or the second paving area of ​​the blank paving mold, and paving N layers of the second material block in sequence according to different preset laying angles on the first paving area and / or the second paving area where the first material block is laid; N is an integer greater than or equal to 1; and the target blank is cured to obtain a butt-jointed truss finished part.

[0079] In an optional embodiment of the present invention, the shape of the baffle matches the shape of the butt-jointed beam finished part.

[0080] In this embodiment, the mold base 1 of the manufacturing mold of the docking girders is welded, with dimensions of 60mm long × 350mm wide × 1000mm high, and a mold weight of 1 ton; the overall utilization rate is high and the mold cost is low; the mold occupies a relatively small area for easy mold storage; the mold is designed with forklift holes 12 and transport wheels 13 for easy mold transportation; the mold width is small, and the operation is convenient when the product is laid, and there is no need for the operator to lie on the mold to operate, and the work efficiency is relatively high; when the product is cured, it occupies a small space in the autoclave, and the heating and cooling rates are fast, and the energy consumption is low; the manufacturing mold of the docking girders described in the present invention solves the problems of high manufacturing cost, inconvenient mold operation and low manufacturing efficiency in the existing docking girders production process through the design of multiple laying cavities and a mold base 1; it realizes rapid prototyping of the docking girders, and at the same time, the mold width is small, which is convenient for convenient operation when the product is laid, and the small footprint is convenient for mold storage, and the small space occupied by the autoclave, the heating and cooling rates are fast, thereby improving the manufacturing efficiency and reducing the production cost.

[0081] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A method for manufacturing a butt-jointed beam, characterized in that: include: Providing a first material block; Laying the first material block on the first paving area and / or the second paving area of ​​the blank paving mold; The first paving area and the second paving area are both L-shaped paving areas, and the L-shaped paving area is the area formed between the upper surface of the mold base (1) of the blank paving mold and the side surface of the baffle (2) located on the mold base (1); the baffle (2) is formed by splicing a plurality of baffle blocks (21); On the first paving area and / or the second paving area where the first material block is paved, N layers of the second material block are paved in sequence according to different preset paving angles to obtain a target blank; N is an integer greater than or equal to 1; The target roughcast part is solidified to obtain a butt-jointed girder finished part.

2. The method for manufacturing a butt-jointed beam according to claim 1, characterized in that: After the first material block is laid on the first laying area and / or the second laying area of ​​the blank laying mold, the method further includes: After laying a non-porous isolation film and a breathable felt on the first laying area and / or the second laying area where the first material block is laid, vacuum sealing and compaction are performed.

3. The method for manufacturing a butt-jointed beam according to claim 2, characterized in that: Carry out vacuum sealing and compaction, including: At the corner position of the L-shaped paving area, the non-porous isolation membrane, the breathable felt and the first material block are vacuum-sealed and compacted according to the compaction margin.

4. The method for manufacturing a butt-jointed beam according to claim 1 or 2, characterized in that: On the first paving area and / or the second paving area where the first material block is paved, N layers of the second material block are paved in sequence according to different preset ply angles to obtain a target blank, including: In the rounded triangle area at the corner position of the first paving area and / or the second paving area where the first material block is paved, unidirectional carbon fiber prepreg is used for twisting and filling; On the first paving area and / or the second paving area filled with twisted yarns, N layers of second material blocks are paved in sequence according to different preset ply angles to obtain a target blank.

5. The method for manufacturing a butt-jointed beam according to claim 1 or 4, characterized in that: According to different preset laying angles, N layers of the second material block are laid in sequence to obtain the target blank, including: The second material block of the i+1th layer and the second material block of the i+3th layer are laid at a first preset angle, and during laying, the second material block of the current layer is connected with the second material block by a butt joint; The second material block of the i+2th layer and the second material block of the i+4th layer are laid at a second preset angle; During paving, the second material blocks of the current layer are connected with the second material blocks by docking until the second material blocks of the N-1th layer and the second material blocks of the Nth layer are all paved to obtain the target blank, wherein the second preset angle is different from the first preset angle, and i is a positive integer between 1 and N.

6. The method for manufacturing a butt-jointed beam according to claim 5, characterized in that: After laying the second material block of the i-th layer, the method further includes: The intermediate blank obtained after paving the i-th layer of the second material block is subjected to vacuuming and compacting at least once, and the vacuuming and compacting time is greater than or equal to a preset time length.

7. The method for manufacturing a butt-jointed beam according to claim 5, characterized in that: During the paving process from the first layer to the Nth layer, the paving wrinkle position of the first material block or the second material block is cut and opened, and the cutting opening positions of the material blocks of two adjacent layers are overlapped, and the overlap amount at the cutting opening ranges from 15 mm to 20 mm.

8. A manufacturing mold for a butt-jointed beam, characterized in that: include: Mold base (1); A baffle formed on the mold base (1), wherein the baffle is formed by splicing a plurality of baffles (2) to form a plate; A first paving area (11) is formed between the first side surface of the baffle and the upper surface of the mold base (1); a second paving area is formed between the second side surface of the baffle and the upper surface of the mold base (1); the first paving area and the second paving area are both L-shaped paving areas; Wherein, the target blank is obtained by paving the first material block in the first paving area and / or the second paving area of ​​the blank paving mold, and paving N layers of the second material block in sequence according to different preset laying angles on the first paving area and / or the second paving area where the first material block is laid; N is an integer greater than or equal to 1; and the target blank is cured to obtain a butt-jointed truss finished part.

9. The manufacturing mold for the butt-jointed beam according to claim 8, characterized in that: The shape of the baffle plate matches the shape of the butt-jointed beam finished product.

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