Interlayer common-bottom roundness correction locking tool and pressing method

Abstract

The invention discloses an interlayer common-bottom roundness correction locking tool which comprises an upper disc assembly, a lower disc assembly and a limiting tool, the upper disc assembly and the lower disc assembly are mechanically connected through bolts, and the limiting tool is arranged on the upper disc assembly and used for adjusting the distance between the upper disc assembly and the lower disc assembly. The interlayer-bottom-sharing roundness correction locking tool is easy to operate, time-saving, labor-saving and high in practicability, in the pressing process of a product to be roundness corrected, it can be guaranteed that one circle of fork-shaped rings of an upper panel and a lower panel of the product is evenly stressed, the roundness of the outer circles of the upper panel and the lower panel is consistent, in the pressing process, redundant resin between the upper panel and the lower panel overflows along the side wall, and therefore the roundness of the product to be roundness corrected is guaranteed. And when the stress is uniform, the resin overflows uniformly, so that the gluing quality of an interlayer common-bottom product is improved.

Description

Technical Field

[0001] This invention relates to the field of adhesive manufacturing of sandwich structure products with a "metal-foam-metal" structure, and particularly to a sandwich common-bottom rounding locking tool and pressing method. Background Technology

[0002] Since the bottom section, upper panel, and lower panel of the launch vehicle's interlayer are all welded aluminum products, local deformation is likely to occur during the welding process.

[0003] The sandwich panel, composed of multiple welded metal panels, often has poor roundness. Therefore, a roundness-correcting fixture is needed to ensure the roundness of the finished product. Traditional panel roundness correction involves measuring the gap between the panel and the ring fixing fixture, then inserting a thin slab between the panel's outer circle and the ring fixing fixture based on the measurement. This method is time-consuming and labor-intensive, and cannot guarantee uniform glue distribution during pressing, easily causing bulging in the product. Therefore, there is an urgent need for a roundness-correcting locking fixture that can accurately correct the outer roundness of the upper and lower panels, ensuring consistent roundness; and that during pressing, the fork-shaped rings on both panels experience uniform force and glue overflow, thereby improving the bonding quality of the product. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a locking fixture with a common bottom layer, the specific technical solution of which is as follows:

[0005] A double-layered, common-bottom, rounding locking fixture, the fixture comprising: an upper disc assembly, a lower disc assembly, and a limiting fixture, wherein:

[0006] The upper disk assembly and the lower disk assembly are mechanically connected by bolts;

[0007] The limiting fixture is mounted on the upper disc assembly and is used to adjust the distance between the upper disc assembly and the lower disc assembly.

[0008] Furthermore, the upper disc assembly includes equally divided upper pressure plates. One end of the upper pressure plate is provided with a positioning pin, and the other end is provided with an oblong hole that matches the positioning pin. The positioning pin of the upper pressure plate is inserted into the oblong hole of another upper pressure plate to realize the mechanical connection between adjacent upper pressure plates.

[0009] The upper pressure plates are also connected in pairs by bolts;

[0010] The number of equally divided upper pressure plates is determined according to the diameter of the locking component to be calibrated;

[0011] The upper pressure plate is provided with bolt holes and is connected to the lower disc assembly by locking bolts;

[0012] The lower disc assembly includes equally divided lower pressure discs. One end of each lower pressure disc is provided with a positioning pin, and the other end is provided with an oblong hole that matches the positioning pin. The positioning pin of the lower pressure disc is inserted into the oblong hole of another lower pressure disc to realize the mechanical connection between adjacent lower pressure discs.

[0013] The lower pressure plate is provided with bolt holes and is connected to the upper disc assembly by locking bolts;

[0014] The number of equally divided upper pressure plates is consistent with the number of upper pressure plates;

[0015] The lower pressure plates are also connected in pairs by bolts.

[0016] Furthermore, in addition to the grooves provided on the upper pressure plate and the lower pressure plate, reinforcing ribs are also provided to ensure the strength of the rounding and locking fixture.

[0017] Furthermore, the limiting fixture includes a height equalization block and a pressure block; wherein:

[0018] The equalizing blocks are installed in the mounting holes of the upper pressure plate to control the distance between the upper and lower panels of the product to be rounded, thereby controlling the height of the upper pressure plate pressing down.

[0019] The pressure block presses onto the equal-height block and is fixed to the pressure plate by two bolts;

[0020] The pressure block is used to press down the equal-height block to ensure that the upper surface of the equal-height block is flush with the upper surface of the groove of the upper pressure plate;

[0021] The sides of the upper and lower pressure plates have oblong holes to facilitate the installation of positioning pins.

[0022] Furthermore, the flatness of the contact surface between the pressure plate of the upper and lower disc assemblies and the contact surface between the pressure plate and the disc to be calibrated is less than or equal to 0.15 mm, so as to ensure the fit between the upper and lower disc assemblies.

[0023] Furthermore, the distance between the center of the locking bolts of the upper and lower pressure plates and the root of the inner ring of the tooling is less than or equal to 45mm, to prevent the tooling opening from being locked during the pressing process.

[0024] Furthermore, the height of the leveling blocks is divided into 6 types, with dimensions of 25.2mm, 28mm, 30mm, 0.1mm, 0.5mm, and 1mm respectively. The leveling blocks can be replaced or combined according to the actual height requirements.

[0025] Furthermore, the upper and lower pressure plates are made of aluminum alloy 2A14 T6.

[0026] Furthermore, the aluminum alloy 2A14 T6 is anodized to improve the hardness of the aluminum alloy material and extend the service life of the upper and lower pressure plates.

[0027] The present invention also provides a pressing method using the aforementioned interlayer common-bottom rounding locking fixture, comprising the following steps:

[0028] S1. Connect two adjacent upper pressure plates with a positioning pin. Insert the positioning pin into the oblong hole for mechanical positioning.

[0029] S2. Bolts pass through the sides of two adjacent pressure plates, and circumferential bolts are installed to assemble the upper disc assembly.

[0030] S3. Connect and fix the components into the lower disc assembly using the same method as S1 and S2.

[0031] S4. Place the assembled upper and lower disc components onto the upper surface of the lower panel and the lower surface of the upper panel of the sandwich-type bottom product to be calibrated, respectively.

[0032] S5. During installation, align the four quadrants (I, II, III, IV) on the roundness locking fixture with the four quadrants of the product to be rounded and align the circumferential screws evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential screws evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential screws evenly.

[0033] S6. After the S5 rounded sandwich common bottom product is rounded, the formal pressing is carried out. Each upper panel assembly has a uniformly distributed pressing part, which is evenly distributed on the upper panel assembly. At the same time, the same height block of the same specification is selected for each pressing part, and the height block is placed in the groove of the pressing part.

[0034] S7. Install the pressure block above the equal height block. Each pressure block is fixed by two screws on the left and right sides. After tightening the screws, start pressing down on the equal height block.

[0035] S8. Let the product stand for 10 minutes and observe the amount of glue overflow after pressing. Gradually change the size of the equal-height block according to the amount of glue overflow to control the pressing height of the lower panel.

[0036] Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

[0037] The sandwich-type common-bottom rounding locking fixture provided by this invention is simple to operate, saves time and effort, and is highly practical. During the product pressing process, it can ensure that the fork-shaped rings of the upper and lower panels of the product to be rounded are subjected to uniform force. During the pressing process, excess resin between the upper and lower panels overflows along the side wall. When the force is uniform, the resin overflows uniformly, thereby improving the bonding quality of the sandwich-type common-bottom product. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a schematic diagram of the overall structure of the rounding and locking fixture provided by the present invention in an assembled state;

[0040] Figure 2 This is a partial installation diagram of the rounding and locking fixture provided by the present invention in an assembled state;

[0041] Figure 3 and Figure 4 This is a schematic diagram of the splicing edge of the upper and lower pressure plates of the rounding and locking fixture provided by the present invention;

[0042] Figure 5 and Figure 6 This is a schematic diagram of the rounding and locking pressing joint provided by the present invention.

[0043] Figure label:

[0044] 1. Upper disc assembly; 2. Lower disc assembly; 3. M16×80 bolt; 4. M16×80 bolt; 5. Locating pin; 6. Waist-shaped hole; 7. Pressure block; 8. M8×16 bolt; 9. Equal height block; 10. Limiting fixture; 11. Bolt hole; 12. Reinforcing rib.

[0045] Specific implementation methods

[0046] The invention will be further described below with reference to the accompanying drawings, taking a sandwich common-bottom round locking fixture with a diameter of 2250mm as an example.

[0047] like Figure 1 As shown, a double-layered, common-bottomed round locking fixture includes: an upper disc assembly 1, a lower disc assembly 2, and a limiting fixture 10, wherein:

[0048] The upper disk assembly 1 and the lower disk assembly 2 are mechanically connected by M16×80 bolts 3, such as Figure 2 As shown;

[0049] The limiting fixture 10 is mounted on the upper disc assembly 1 and is used to adjust the distance between the upper disc assembly 1 and the lower disc assembly 2.

[0050] The upper disc assembly 1 includes an equally divided upper pressure plate. One end of the upper pressure plate is provided with a positioning pin 5, and the other end is provided with an oblong hole 6 that matches the positioning pin 5. The positioning pin 5 of the upper pressure plate is inserted into the oblong hole 6 of another upper pressure plate to realize the mechanical connection between adjacent upper pressure plates.

[0051] The upper pressure plates are also connected in pairs by M16x80 bolts 4, such as Figure 2 As shown;

[0052] The upper pressure plate is provided with bolt holes and is connected to the lower disc assembly 2 by locking bolts, such as... Figure 2 As shown;

[0053] The lower disc assembly includes six equally divided lower pressure discs. Each lower pressure disc has a locating pin 5 at one end and a slotted hole 6 at the other end that matches the locating pin. The locating pin 5 of one lower pressure disc is inserted into the slotted hole 6 of another lower pressure disc to achieve a mechanical connection between adjacent lower pressure discs. Figure 3 , Figure 4 As shown;

[0054] The lower pressure plate is provided with 4 bolt holes 11, and is connected to the upper disc assembly 1 piece by locking bolts;

[0055] The lower pressure plates are also connected in pairs by bolts 4.

[0056] The upper and lower pressure plates are provided with grooves and reinforcing ribs 12 to ensure the strength of the rounding and locking fixture. Figure 1 As shown.

[0057] like Figure 5 , Figure 6 As shown, the limiting fixture 10 includes a height equalizer 9 and a pressure block 7, wherein: the height equalizer 9 is set in the assembly hole of the upper pressure plate to control the distance between the upper panel and the lower panel of the product to be rounded, thereby controlling the height of the upper pressure plate pressing down. The pressure block 7 presses onto the equal height block 9 and is fixed to the pressure plate by two M8×16 bolts 8; The pressure block 7 is used to press down the equalizing block 9 to ensure that the upper surface of the equalizing block 9 is flush with the upper surface of the groove of the upper pressure plate; The sides of the upper and lower pressure plates have oblong holes 6, which facilitates the installation of the positioning pins 5.

[0061] The flatness of the contact surface between the upper disc assembly 1 and the lower disc assembly 2, and the contact surface between the pressure plate and the disc to be calibrated, is equal to 0.15mm, so as to ensure the fit between the upper disc assembly 1 and the lower disc assembly 2.

[0062] The distance between the upper disc assembly 1 and the lower disc assembly 2 is 28mm, which ensures that the upper and lower panels of the product are fully pressed together.

[0063] The distance between the center of the locking bolts of the upper and lower pressure plates and the root of the inner ring of the tooling is 45mm, to prevent the tooling opening from being locked during the pressing process.

[0064] The contour blocks 9 come in six different heights and have dimensions of 25.2mm, 28mm, 30mm, 0.1mm, 0.5mm, and 1mm, totaling 984 blocks. The contour blocks can be replaced or combined according to the actual height requirements.

[0065] The upper and lower pressure plates are made of aluminum alloy 2A14 T6 and have undergone anodized surface treatment to improve the hardness of the aluminum alloy material and extend the service life of the upper and lower pressure plates.

[0066] A pressing method using the aforementioned interlayer common-bottom rounding locking fixture includes the following steps:

[0067] S1. Connect two adjacent upper pressure plates with positioning pins 5. Insert the positioning pins 5 into the oblong holes 6 for mechanical positioning.

[0068] S2 and M16×80 bolts 4 pass through the sides of two adjacent pressure plates, and circumferential bolts are installed to form the upper disc assembly 1;

[0069] S3. Connect and fix the lower disc assembly 2 using the same method as S1 and S2;

[0070] S4. Place the assembled upper disc assembly 1 and lower disc assembly 2 onto the upper surface of the lower panel and the lower surface of the upper panel of the sandwich-type bottom product to be calibrated, respectively.

[0071] S5. During installation, align the four quadrants (I, II, III, IV) on the roundness locking fixture with the four quadrants of the product to be rounded and align the circumferential bolts evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential bolts evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential bolts evenly.

[0072] S6. After the S5 rounded sandwich common bottom product is rounded, the formal pressing is carried out. Each upper panel component has a uniformly distributed pressing part, which is evenly distributed on the upper panel component. At the same time, the same height block 9 of the same specification is selected for each pressing part and the height block is placed in the groove of the pressing part.

[0073] S7. Install the pressure block 7 above the leveling block 9. Each pressure block 7 is fixed by two M8×16 screws 8 on the left and right sides. After tightening the screws, start pressing down on the leveling block 9.

[0074] S8. Let the product stand for 10 minutes and observe the amount of glue overflow after pressing. Gradually change the size of the equal-height block according to the amount of glue overflow to control the pressing height of the lower panel.

[0075] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any person skilled in the art can make possible variations and modifications to the technical solutions of the present invention using the disclosed methods and techniques without departing from the spirit and scope of the invention. Therefore, any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, are all within the protection scope of the present invention. Content not described in detail in this specification is common knowledge to those skilled in the art.

Claims

1. A locking fixture for a sandwich structure with a common bottom, characterized in that, The tooling includes: an upper disc assembly, a lower disc assembly, and a limiting tooling, wherein: The upper disk assembly and the lower disk assembly are mechanically connected by bolts; The limiting fixture is installed on the upper disc assembly and is used to adjust the distance between the upper disc assembly and the lower disc assembly.

2. The locking fixture for a sandwich structure with a common bottom as described in claim 1, characterized in that, The upper disc assembly includes equally divided upper pressure plates. One end of the upper pressure plate is provided with a positioning pin, and the other end is provided with an oblong hole that matches the positioning pin. The positioning pin of the upper pressure plate is inserted into the oblong hole of another upper pressure plate to realize the mechanical connection between adjacent upper pressure plates. The upper pressure plates are also connected in pairs by bolts; The number of equally divided upper pressure plates is determined according to the diameter of the locking component to be calibrated; The upper pressure plate is provided with bolt holes and is connected to the lower disc assembly by locking bolts; The lower disc assembly includes equally divided lower pressure discs. One end of each lower pressure disc is provided with a positioning pin, and the other end is provided with an oblong hole that matches the positioning pin. The positioning pin of the lower pressure disc is inserted into the oblong hole of another lower pressure disc to realize the mechanical connection between adjacent lower pressure discs. The lower pressure plate is provided with bolt holes and is connected to the upper disc assembly by locking bolts; The number of equally divided upper pressure plates is consistent with the number of upper pressure plates; The lower pressure plates are also connected in pairs by bolts.

3. The locking fixture for a sandwich structure with a common bottom as described in claim 2, characterized in that, The upper pressure plate and the lower pressure plate are provided with grooves and reinforcing ribs to ensure the strength of the rounding and locking fixture.

4. The locking fixture for a sandwich structure with a common bottom as described in claim 1, characterized in that, The limiting fixture includes a height-equalizing block and a pressure block; wherein: The equalizing blocks are installed in the mounting holes of the upper pressure plate to control the distance between the upper and lower panels of the product to be rounded, thereby controlling the height of the upper pressure plate pressing down. The pressure block presses onto the equal-height block and is fixed to the pressure plate by two bolts; The pressure block is used to press down the equal-height block to ensure that the upper surface of the equal-height block is flush with the upper surface of the groove of the upper pressure plate; The sides of the upper and lower pressure plates have oblong holes to facilitate the installation of positioning pins.

5. The interlayer common-bottom rounding locking fixture according to claim 1, characterized in that, The flatness of the contact surface between the pressure plate of the upper and lower disc assemblies and the contact surface between the pressure plate and the disc to be calibrated is less than or equal to 0.15 mm, so as to ensure the fit between the upper and lower disc assemblies.

6. The interlayer common-bottom rounding locking fixture according to claim 2, characterized in that, The distance between the center of the locking bolts of the upper and lower pressure plates and the root of the inner ring of the tooling is less than or equal to 45mm, so as to avoid locking the tooling opening during the pressing process.

7. The interlayer common-bottom rounding locking fixture according to claim 4, characterized in that, The height of the contour blocks is divided into 6 types, with dimensions of 25.2mm, 28mm, 30mm, 0.1mm, 0.5mm, and 1mm respectively. The contour blocks can be replaced or combined according to the actual height requirements.

8. The interlayer common-bottom rounding locking fixture according to claim 2, characterized in that... The upper and lower pressure plates are made of aluminum alloy 2A14 T6.

9. The interlayer common-bottom rounding locking fixture according to claim 8, characterized in that... The aluminum alloy 2A14 T6 has undergone anodizing to improve the hardness of the aluminum alloy material and extend the service life of the upper and lower pressure plates.

10. A pressing method using the aforementioned interlayer common-bottom rounding locking fixture, characterized in that, Includes the following steps: S1. Connect two adjacent upper pressure plates with a positioning pin. Insert the positioning pin into the oblong hole for mechanical positioning. S2. Bolts pass through the sides of two adjacent pressure plates, and circumferential bolts are installed to assemble the upper disc assembly. S3. Connect and fix the components into the lower disc assembly using the same method as S1 and S2. S4. Place the assembled upper and lower disc components onto the upper surface of the lower panel and the lower surface of the upper panel of the sandwich-type bottom product to be calibrated, respectively. S5. During installation, align the four quadrants (I, II, III, IV) on the roundness locking fixture with the four quadrants of the product to be rounded and align the circumferential screws evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential screws evenly, so that the roundness locking fixture clamps the inner outer circle of the upper panel and the lower panel of the product to be rounded and aligns the circumferential screws evenly. S6. After the S5 rounded sandwich common bottom product is rounded, the formal pressing is carried out. Each upper panel assembly has a uniformly distributed pressing part, which is evenly distributed on the upper panel assembly. At the same time, the same height block of the same specification is selected for each pressing part, and the height block is placed in the groove of the pressing part. S7. Install the pressure block above the equal height block. Each pressure block is fixed by two screws on the left and right sides. After tightening the screws, start pressing down on the equal height block. S8. Let the product stand for 10 minutes and observe the amount of glue overflow after pressing. Gradually change the size of the equal-height block according to the amount of glue overflow to control the pressing height of the lower panel.

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