Forming and cementing clamp and forming method for basin-shaped plate core metal cementing workpiece

Abstract

The invention discloses a forming and cementing clamp and a forming method for a basin-shaped plate core metal cementing workpiece, a forming surface of a metal bottom plate in the clamp is an aircraft aerodynamic configuration surface of the basin-shaped plate core metal cementing workpiece, and the basin-shaped plate core metal cementing workpiece is fixedly placed on the metal bottom plate; a workpiece circumferential inclined table surface is formed in a cementing transition area of the bottom end surface of the basin-shaped inner skin and the metal outer skin; the inclined table top on the periphery of a clamp of the composite structure pressing ring is placed on the basin-shaped inner skin, and shape-preserving pressure transmission is carried out on the basin-shaped plate core metal glue joint part in the curing process. A plurality of thickness control blocks are fixedly arranged on the metal bottom plate at intervals; the thickness control blocks support the composite structure pressing ring from the circumference, and gaps between the thickness control blocks arranged at intervals are used for enabling overflowing glue in the basin-shaped plate core metal glue joint part to flow out in the curing process. The lateral compaction problem of the basin-shaped structure metal honeycomb core glue joint workpiece is solved, the manufacturing precision of a workpiece connecting area is improved, and the rejection rate of the workpiece and the follow-up assembly difficulty are reduced.

Description

Technical Field

[0001] This invention patent relates to the field of metal honeycomb core part bonding molding manufacturing technology in composite material molding technology, and particularly to a molding bonding fixture and molding method for a basin-shaped core metal bonding part. Background Technology

[0002] Aerospace metal honeycomb structures (such as aluminum honeycomb cores + aluminum alloy panels) are widely used in the aerospace field for their ultra-high specific strength, excellent impact resistance, and superior damping characteristics, particularly on internal and external flaps and vertical tails. Their core technology is adhesive bonding, which uses adhesives to achieve co-curing and connection between the panels and the honeycomb core. This avoids the weight increase and stress concentration problems associated with traditional mechanical connections, significantly improving the structure's lightweight level and fatigue life.

[0003] The manufacturing of aerospace metal honeycomb structures faces severe challenges. On the one hand, the bonding and matching of the honeycomb core and thin-walled panels is difficult, and the adhesive layer is hard to control. On the other hand, in traditional bonding processes, the flow of adhesive during curing is affected by the size of the honeycomb core and the temperature field distribution, and adhesive enrichment or depletion are prone to occur in the edge areas, resulting in thickness deviations. Due to the large fluctuations in the thickness of the connection area during manufacturing, assembly gaps are introduced, which increases the subsequent assembly cycle and the weight of the aircraft, becoming a bottleneck restricting the manufacturing of high-performance aerospace equipment. Summary of the Invention

[0004] The purpose of this invention is to provide a molding and bonding fixture and molding method for a basin-shaped metal core bonding component, in order to solve the problem that in the existing basin-shaped metal honeycomb bonding process, the thickness of the adhesive layer in the core bonding area is difficult to control and fluctuates greatly, which affects the subsequent assembly of the aircraft. Specifically, it increases the subsequent assembly cycle and the weight of the aircraft, becoming a bottleneck restricting the manufacturing of high-performance aerospace equipment.

[0005] The technical solution of the present invention is as follows: In the first aspect, the present invention provides a molding and bonding fixture for a basin-shaped core metal adhesive bonding component, the molding and bonding fixture comprising: a metal base plate 1, a pressure ring positioning pin 5, a part positioning pin 6, a thickness control block 7, and a thickness control block positioning pin 8. Wherein, the forming surface of the metal base plate 1 is the aerodynamic shape surface of the basin-shaped core metal adhesive component of the aircraft. The metal base plate 1 is used to fix and place the basin-shaped core metal adhesive component including the metal outer skin 10, the honeycomb core 13, and the basin-shaped inner skin 14. The bottom end face of the basin-shaped inner skin 14 and the bonding transition area between the metal outer skin 10 form a perimeter inclined platform surface of the component. The inner ring of the composite structure pressure ring has a clamping perimeter inclined platform, which is placed on the basin-shaped inner skin 14, so that the clamping perimeter inclined platform of the inner ring of the composite structure pressure ring and the component perimeter inclined platform of the outer ring of the basin-shaped inner skin 14 form an inclined surface fit, which is used to perform shape-preserving pressure transfer on the basin-shaped core metal adhesive component during the curing process. On the metal base plate 1, around the perimeter of the basin-shaped core metal adhesive component, multiple thickness control blocks 7 are fixedly arranged at predetermined intervals at the edges of the component. The thickness control blocks 7 are used to support the perimeter composite structure pressure ring and make it fit the surface of the basin-shaped core metal adhesive component. The gaps between the spaced thickness control blocks 7 are used to allow the overflow of adhesive inside the basin-shaped core metal adhesive component during the curing process.

[0006] Optionally, in the molding and bonding fixture for the basin-shaped core metal adhesive component as described above, the composite structure pressure ring includes: a metal pressure ring 2 and a rubber pressure pad 4. The inner ring of the annular metal pressure ring 2 has a clamping perimeter inclined platform surface, which matches the profile of the component perimeter inclined platform surface in the bonding transition area of ​​the basin-shaped inner skin 14. The annular rubber pressure pad 4 is vulcanized and fixed to the clamping perimeter inclined platform surface and perimeter platform area of ​​the metal pressure ring 2 to form a composite structure pressure ring.

[0007] Optionally, in the molding and bonding fixture for the basin-shaped core metal adhesive component as described above, The theoretical distance t1 between the metal pressure ring 2 and the basin-shaped inner skin 14 in the composite structure pressure ring is t1, which is the thickness of the rubber pressure transmission pad 4 under pressure. It is used to compensate for the gap between the metal pressure ring 2 and the basin-shaped inner skin 14 through the rubber pressure transmission pad 4 during the curing process and to uniformly transmit pressure. The metal pressure ring 2 and the rubber pressure pad 4 are pre-formed into an integrated structure through a vulcanization process, ensuring that the rubber pressure pad 4 and the planar area, R area and inclined area of ​​the metal pressure ring 2 are completely adhered. The rubber pressure pad in the annular allowance area with a preset width inward from the edge of the metal pressure ring 2 is cut and removed to ensure that the annular allowance area of ​​the metal pressure ring 2 is in direct hard contact with the thickness control block 7 during the curing process.

[0008] Optionally, in the molding and bonding fixture for the basin-shaped core metal adhesive component as described above, The function of the rubber pressure pad 4 is to compensate for the gap between the metal pressure ring 2 and the basin-shaped inner skin 14 during the curing process, and the thickness t of the rubber pressure pad 4 decreases with the increase of pressure P; the initial thickness of the rubber pressure pad 4 in the molding adhesive jig, that is, the thickness in the unpressurized state, is H, and the thickness of the rubber pressure pad 4 in the pressurized state is calculated as follows: Calculate the compression of rubber pressure pad 4, based on the following relationship between compression (&) and pressure (P): &=kH(1-eαp) Where & is the compression amount of the rubber pressure pad 4, H is the thickness of the rubber pressure pad 4 in the unpressurized state, P is the pressure inside the autoclave, k is the material compression coefficient, and α is the pressure response coefficient. The thickness of the rubber pressure pad 4 under pressure in the autoclave is then t1 = H - &.

[0009] Optionally, in the molding and bonding fixture for the basin-shaped core metal adhesive component as described above, Each thickness control block 7 has a width not exceeding 15mm and a length not exceeding 50mm. Both ends of the thickness control block 7 are provided with Φ5mm pin holes for fixing and installing it on the metal base plate 1 by pins. The theoretical thickness t of each thickness control block 7 k Calculated as follows: t k =t P +t1-0.1mm; Among them, t k To control the theoretical thickness of block 7, t p This represents the theoretical thickness of the metal-bonded component along the core of the basin-shaped plate.

[0010] Optionally, the molding and bonding fixture for the basin-shaped core metal adhesive component as described above further includes: a pressure equalizing plate 3; The pressure equalizing plate 3 is placed on the basin-shaped protrusion area of ​​the basin-shaped inner skin 14 to uniformly transfer pressure to the basin-shaped protrusion area of ​​the basin-shaped inner skin 14 during the curing process.

[0011] The pressure equalizing plate 3 is made of aluminum plate with a thickness of 0.5mm to 1.5mm, which is easy to conform to shape. There is a gap of 0.5mm to 1mm between the pressure equalizing plate 3 and the inner ring area of ​​the composite structure pressure ring.

[0012] Optionally, in the molding and bonding fixture for the basin-shaped core metal adhesive component as described above, The composite structure pressure ring is connected to the metal base plate 1 by multiple positioning pins; The metal base plate 1 has multiple Φ10mm blind holes. The composite structure pressure ring is connected to the Φ10mm blind holes on the metal base plate 1 by two Φ8mm positioning pins, which are used for lateral sliding and alignment of the composite structure pressure ring during the compression process. Multiple Φ5mm blind holes for pins are opened around the perimeter of the metal base plate 1, extending 5mm inward, for mounting the thickness control block 7.

[0013] Optionally, the molding and bonding fixture for the basin-shaped core metal bonding component as described above further includes: a thickness adjustment piece 9; The thickness adjustment piece 9 is positioned between the thickness control block 7 and the metal base plate 1. It compensates for the actual thickness of the thickness control block 7, using the difference between the actual thickness and the theoretical thickness of the thickness control block 7. For example, the thickness of the thickness adjustment piece is 0.05 mm.

[0014] In a second aspect, the present invention also provides a method for forming a basin-shaped core metal bonded component, wherein the forming method is performed using a forming and bonding fixture for basin-shaped core metal bonded components as described in any of the preceding claims, comprising: Step 1: Place 0-2 thickness control adjustment pieces 9 as needed at the position of the thickness control block 7 on the metal base plate 1 according to the surface inspection data of the metal base plate 1, and then fix the thickness control block 9. Adjust the thickness to the sum of the theoretical thickness of the basin-shaped core metal adhesive component and the thickness of the rubber pressure transmission pad 4 under pressure, and reduce it by 0.1mm. Step 2: Make a calibration membrane to check whether the thickness control block 7 or the thickness adjustment piece 9 of the thickness control block 7 meets the preset design thickness requirements. Step 3: First, remove the excess material from the molding adhesive jig. Then, lay a layer of non-porous release film on the upper surface of the metal base plate 1. The release film extends to cover the outer edge of the thickness control block 7. Step 4: Place the outer skin 10 on the metal base plate 1, and lay the adhesive film on the outer skin 10. The adhesive film covers an area 0-3mm beyond the circumference of the outer skin 10. Cold-press to compact and remove air bubbles from the adhesive film. Step 5: Place pads 12 around the outer skin 10 in sequence, lay adhesive film on the surface of pads 12 and cold-press to remove air bubbles, lay reinforcing plate 11, lay adhesive film on the surface of reinforcing plate 11 and cold-press to remove air bubbles. Step 6: Place the honeycomb core 13 filled with foam adhesive, lay the adhesive film on the inner surface of the basin-shaped inner skin 14, and use a scraper to press the adhesive film firmly to remove air bubbles. Place the adhesive film side of the basin-shaped inner skin 14 on the upper surface of the honeycomb core 13, and use part positioning pins 6 to fix and connect the basin-shaped inner skin 14, pad 12, reinforcing plate 11 and outer skin 10. Step 7: Lay a non-porous isolation film on the upper surface of the basin-shaped inner skin 14, then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block 7, and use the pressure ring positioning pin 5 to position and connect the composite structure pressure ring and the metal base plate 1. Step 8: Place auxiliary materials, make bags and seal them, and cure them in an autoclave.

[0015] Optionally, in the molding method of the basin-shaped core metal adhesive component as described above, step 2 includes: Step 2.1: First, remove the excess material from the molding and bonding fixture. Then, lay a non-porous release film on the surface of the molding and bonding fixture. The release film extends to cover the outer edge of the thickness control block 7. Step 2.2: Place the outer skin 10 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the outer skin 10, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the outer skin 10, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.3: Place the pad 12 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the pad 12, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the pad 12, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.4: Place the reinforcing plate 11 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the reinforcing plate 11, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the reinforcing plate 11, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.5: Finally, place the honeycomb core 13 and place a non-porous isolation membrane on the honeycomb core 13, extending the isolation membrane to the outer edge of the thickness control block 7; Step 2.6: Lay a non-porous isolation film on the inner surface of the inner skin 14, extending the isolation film to the outer edge of the thickness control block 7, and then lay an adhesive film, which is 0-3mm larger than the periphery of the inner skin 14. Place the inner skin on the upper surface of the honeycomb core 13 and fix the outer skin 10, pad 12, reinforcing plate 11 and inner skin 14 by the part positioning pin 6. Step 2.7: Lay a non-porous isolation film on the upper surface of the inner skin 14, then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block 7, and use the pressure ring positioning pin 5 to position and connect the composite structure pressure ring and the metal base plate 1. Step 2.8 involves placing auxiliary materials, bagging and sealing, and autoclaving. Step 2.9: Remove the bag and take out the adhesive film that wraps the inner skin 14, honeycomb core 13, reinforcing plate 11, pad 12 and outer skin 10. Measure the thickness of the adhesive layer at the same position, add it to the thickness of the metal part, and compare it with the theoretical thickness of the component. Based on the comparison results, adjust the thickness of the peripheral thickness control block 7 with the thickness control adjustment piece 9.

[0016] The beneficial effects of this invention are as follows: This invention provides a molding and bonding fixture and molding method for a basin-shaped core metal adhesive component. In the molding fixture, the molding surface of the metal base plate 1 is the aerodynamic shape surface of the basin-shaped core metal adhesive component. The metal base plate 1 is used to fix and place the basin-shaped core metal adhesive component, which includes a metal outer skin 10, a honeycomb core 13, and a basin-shaped inner skin 14. The bonding transition area between the bottom end face of the basin-shaped inner skin 14 and the metal outer skin 10 forms a periphery inclined platform. The inner ring of the composite structure pressure ring has a periphery inclined platform of the fixture, which is placed on the basin-shaped inner skin 14, so that... The inclined surface of the clamping ring of the composite structure pressure ring and the inclined surface of the outer ring of the basin-shaped inner skin 14 form an inclined surface to fit together, which is used to maintain the shape and transfer pressure of the basin-shaped core metal adhesive component during the curing process. Multiple thickness control blocks 7 are fixedly arranged at preset distances from the edge of the component along the perimeter of the basin-shaped core metal adhesive component on the metal base plate 1. The thickness control blocks 7 are used to support the composite structure pressure ring from the perimeter, making it fit against the surface of the basin-shaped core metal adhesive component. The gaps between the spaced thickness control blocks 7 are used to allow excess adhesive to flow out from inside the basin-shaped core metal adhesive component during the curing process. The technical solution provided by this invention solves the problem of lateral compaction of the basin-shaped structure metal honeycomb core adhesive component, improves the manufacturing accuracy of the component connection area, reduces the scrap rate of the component and the difficulty of subsequent assembly, and has the following beneficial effects: First, by using the metal pressure ring and the rubber pressure pad simultaneously, the problem of interference in the hard-hard mating area such as the R area is eliminated, and the problems of lateral bridging or incomplete compaction in the R area and honeycomb are avoided, thus reducing the scrap rate of the parts. Second, the contact area between the edge of the pressure ring and the thickness control block adopts a hard-hard fit, which helps to accurately control the thickness of the part connection area. The contact area with the part adopts a soft-hard fit of the rubber pressure plate, which facilitates the uniform transmission of curing pressure and improves the quality of the part. Third, the thickness control block and thickness adjustment plate are used together, and the pin positioning can effectively adjust the gap between the pressure ring and the tooling metal base plate, eliminating thickness fluctuations caused by changes in the thickness of the metal skin, and can control the thickness tolerance of the parts within ±0.1mm. Attached Figure Description

[0017] The accompanying drawings are provided to further understand the technical solutions of the present invention and constitute a part of the specification. They are used together with the embodiments of this application to explain the technical solutions of the present invention and do not constitute a limitation on the technical solutions of the present invention.

[0018] Figure 1 A cross-sectional view of a molding and bonding fixture for a basin-shaped core metal adhesive component provided by the present invention; Figure 2 for Figure 1 A top view of the molding adhesive clamp provided in the illustrated embodiment; Figure 3 for Figure 1 The schematic diagram of the pressure ring in the molding adhesive bonding fixture provided in the embodiment shown is as follows. Figure 4 for Figure 1 A schematic diagram of the cooperation between the control block and the adjusting plate in the molding adhesive bonding fixture provided in the embodiment shown; Figure 5 for Figure 1 A schematic diagram of the adhesive component assembly in the molding adhesive bonding fixture provided in the illustrated embodiment.

[0019] Explanation of reference numerals in the attached figures: 1—Metal base plate, 2—Metal pressure ring, 3—Equalizing pressure plate, 4—Rubber pressure pad, 5—Pressure ring positioning pin, 6—Part positioning pin, 7—Thickness control block, 8—Thickness control block positioning pin, 9—Thickness adjustment piece, 10—Outer skin, 11—Reinforcing plate, 12—Pad plate, 13—Honeycomb core, 14—Basin-shaped inner skin. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

[0021] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of the present invention.

[0022] like Figure 1 and Figure 2 As shown, this embodiment of the invention provides a molding and bonding fixture for a basin-shaped core metal adhesive component, used to manufacture the basin-shaped core metal adhesive component, which includes: an outer skin 10, a reinforcing plate 11, a pad 12, a honeycomb core 13, and a basin-shaped inner skin 14. Figure 1 and Figure 2 As shown, the molding and bonding fixture provided by the present invention includes: an outer skin 10, a honeycomb core 13, and a basin-shaped inner skin 14; the molding and bonding fixture includes: a metal base plate 1, a composite structure pressure ring, a thickness control block 7, and a thickness control block positioning pin 8.

[0023] In this embodiment of the invention, the metal base plate 1 is made of aluminum alloy. The forming surface of the metal base plate 1 is the aerodynamic shape surface of the basin-shaped core metal adhesive component. The metal base plate 1 is used to fix and place the basin-shaped core metal adhesive component, which includes a metal outer skin 10, a honeycomb core 13, and a basin-shaped inner skin 14. The bottom end face of the basin-shaped inner skin 14 and the bonding transition area between the inner skin 14 and the outer skin 10 form a perimeter inclined platform surface of the component.

[0024] In this embodiment of the invention, the inner ring of the composite structure pressure ring has a clamping perimeter inclined platform, which is placed on the basin-shaped inner skin 14, so that the clamping perimeter inclined platform of the inner ring of the composite structure pressure ring and the component perimeter inclined platform of the outer ring of the basin-shaped inner skin 14 form an inclined surface fit, which is used to perform shape-preserving pressure transfer on the basin-shaped core metal adhesive component during the curing process.

[0025] In this embodiment of the invention, a plurality of thickness control blocks 7 are fixedly arranged on the metal base plate 1 along the periphery of the basin-shaped core metal adhesive component, with the thickness control blocks 7 spaced at a predetermined distance from the edge of the component; the thickness control blocks 7 are used to support the periphery of the composite structure pressure ring, so that it fits the surface of the basin-shaped core metal adhesive component, and the gaps between the spaced thickness control blocks 7 are used for the overflow of adhesive inside the basin-shaped core metal adhesive component during the curing process.

[0026] In one embodiment of the present invention, the composite pressure ring includes: a metal pressure ring 2 and a rubber pressure pad 4.

[0027] In this implementation, the inner ring of the annular metal pressure ring 2 forms a clamping perimeter inclined platform, which matches the profile of the component perimeter inclined platform in the bonding transition area of ​​the basin-shaped inner skin 14. The annular rubber pressure pad 4 is vulcanized and fixed to the clamping perimeter inclined platform and perimeter platform area of ​​the metal pressure ring 2 to form a composite structure pressure ring.

[0028] In specific implementation, after the composite structure pressure ring is placed in place, the pressure equalizing plate 3 is placed on the basin-shaped protrusion area of ​​the basin-shaped inner skin 14 to uniformly transfer pressure to the basin-shaped protrusion area of ​​the basin-shaped inner skin 14 during the curing process. In addition, multiple thickness control blocks 7 are fixedly arranged at preset distances from the edge of the part; for example, the thickness control blocks 7 are placed in an area more than 10mm away from the edge of the part, and each thickness control block is arranged at a distance of 50mm. The thickness control blocks 7 are used to support the composite structure pressure ring from the periphery, so that it fits the surface of the basin-shaped core metal adhesive part, and the gaps between the spaced thickness control blocks 7 are used for the overflow of adhesive inside the basin-shaped core metal adhesive part during the curing process.

[0029] In one embodiment of the present invention, the composite pressure ring is made of a pressure plate 2 and a rubber pressure pad 4. The theoretical distance t1 between the metal pressure ring 2 and the basin-shaped inner skin 14 is the thickness of the rubber pressure pad 4 under pressure. The rubber pressure pad 4 is used to compensate for the gap between the metal pressure ring 2 and the basin-shaped inner skin 14 during the curing process and to uniformly transmit pressure.

[0030] In this implementation, the metal pressure ring 2 and the rubber pressure pad 4 are pre-formed into an integrated structure through a vulcanization process, ensuring that the planar area, R-area, and inclined area of ​​the rubber pressure pad 4 are completely adhered to the metal pressure ring 2. Furthermore, the rubber pressure pad within a pre-defined annular allowance area extending inward from the edge of the metal pressure ring 2 is cut and removed. This ensures that during the curing process, the annular allowance area of ​​the metal pressure ring 2 makes direct hard contact with the thickness control block 7. For example, removing the rubber pressure pad creates a 20mm wide annular allowance area at the edge of the metal pressure ring 2.

[0031] In one implementation of this invention, the rubber pressure pad 4 serves to compensate for the gap between the metal pressure ring 2 and the basin-shaped inner skin 14 during the curing process, and the thickness t of the rubber pressure pad 4 decreases as the pressure P increases; the initial thickness of the rubber pressure pad 4 in the molding adhesive jig, i.e., the thickness in the unpressurized state, is H, and the thickness of the rubber pressure pad 4 in the pressurized state is calculated as follows: Calculate the compression of rubber pressure pad 4, based on the following relationship between compression (&) and pressure (P): &=kH(1-e αp ); Where & is the compression amount of the rubber pressure pad 4, H is the thickness of the rubber pressure pad 4 in the unpressurized state, P is the pressure inside the autoclave, k is the material compression coefficient, and α is the pressure response coefficient. The thickness of the rubber pressure pad 4 under pressure in the autoclave is then t1 = H - &.

[0032] In one implementation of this invention, the width of each thickness control block 7 does not exceed 15mm, and the length does not exceed 50mm. Both ends of each thickness control block 7 have Φ5mm pin holes for fixing it to the metal base plate 1 using pins. The theoretical thickness t of each thickness control block 7 is... k Calculated as follows: t k =t P +t1-0.1mm; Among them, t k To control the theoretical thickness of block 7, t p This represents the theoretical thickness of the metal-bonded component along the core of the basin-shaped plate.

[0033] In one embodiment of the present invention, the molding adhesive bonding fixture further includes a pressure equalizing plate 3. In this embodiment, the pressure equalizing plate 3 is made of aluminum plate with a thickness of 0.5mm to 1.5mm, which is easy to conform to the shape, and there is a gap of 0.5mm to 1mm between the pressure equalizing plate 3 and the inner ring area of ​​the composite structure pressure ring.

[0034] In one embodiment of the present invention, the composite structure pressure ring is connected to the metal base plate 1 through multiple pressure ring positioning pins 5; The metal base plate 1 has multiple Φ10mm blind holes. The composite structure pressure ring is connected to the Φ10mm blind holes on the metal base plate 1 by two Φ8mm positioning pins, which are used for lateral sliding and alignment of the composite structure pressure ring during the compression process. Multiple Φ5mm blind holes for pins are made around the perimeter of the metal base plate 1, extending 5mm inward, to accommodate the installation of the thickness control block 7.

[0035] In one implementation of this invention, the thickness adjustment piece 9 is disposed between the thickness control block 7 and the metal base plate 1. The thickness adjustment piece 9 compensates for the actual thickness of the thickness control block 7. When using compensation, the difference between the actual thickness and the theoretical thickness of the thickness control block 7 is superimposed. The thickness of the thickness adjustment piece is, for example, 0.05 mm.

[0036] Based on the molding and bonding fixture for the basin-shaped core metal adhesive component provided in the above embodiments of the present invention, the present invention also provides a method for molding the basin-shaped core metal adhesive component using the molding and bonding fixture for the basin-shaped core metal adhesive component, comprising the following steps: Step 1: Place 0-2 thickness control adjustment pieces 9 as needed at the position of the thickness control block 7 on the metal base plate 1 according to the surface inspection data of the metal base plate 1, and then fix the thickness control block 9. Adjust the thickness to the sum of the theoretical thickness of the basin-shaped core metal adhesive component and the thickness of the rubber pressure transmission pad 4 under pressure, and reduce it by 0.1mm. Step 2: Make a calibration membrane and check whether the thickness control block 7 or the thickness adjustment piece 9 of the thickness control block 7 meets the preset thickness requirements. Step 3: First, remove the excess material from the molding adhesive jig. Then, lay a layer of non-porous release film on the upper surface of the metal base plate 1. The release film extends to cover the outer edge of the thickness control block 7. Step 4: Place the outer skin 10 on the metal base plate 1, and lay the adhesive film on the outer skin 10. The adhesive film covers an area 0-3mm beyond the circumference of the outer skin 10. Cold-press to compact and remove air bubbles from the adhesive film. Step 5: Place pads 12 around the outer skin 10 in sequence, lay adhesive film on the surface of pads 12 and cold-press to remove air bubbles, lay reinforcing plate 11, lay adhesive film on the surface of reinforcing plate 11 and cold-press to remove air bubbles. Step 6: Place the honeycomb core 13 filled with foam adhesive, lay the adhesive film on the inner surface of the basin-shaped inner skin 14, and use a scraper to press the adhesive film firmly to remove air bubbles. Place the adhesive film side of the basin-shaped inner skin 14 on the upper surface of the honeycomb core 13, and use part positioning pins 6 to fix and connect the basin-shaped inner skin 14, reinforcing plate 11, pad 12, and outer skin 10. Step 7: Lay a non-porous isolation film on the upper surface of the basin-shaped inner skin 14, then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block 7, and use the pressure ring positioning pin 5 to position and connect the composite structure pressure ring and the metal base plate 1. Step 8: Place auxiliary materials, make bags and seal them, and cure them in an autoclave.

[0037] In one implementation of this invention, step 2 of the above-mentioned method for fabricating the verification membrane is as follows: Step 2.1: First, remove the excess material from the molding and bonding fixture. Then, lay a non-porous release film on the surface of the molding and bonding fixture. The release film extends to cover the outer edge of the thickness control block 7. Step 2.2: Place the outer skin 10 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the outer skin 10, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the outer skin 10, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.3: Place the pad 12 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the pad 12, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the pad 12, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.4: Place the reinforcing plate 11 according to the edge line of the part and the position of the positioning hole on the metal base plate 1 of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the reinforcing plate 11, extend the release film to the outer edge of the thickness control block 7, then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the reinforcing plate 11, and then place another layer of non-porous release film on the surface of the adhesive film, extending to the outer edge of the thickness control block 7; Step 2.5: Finally, place the honeycomb core 13 and place a non-porous isolation membrane on the honeycomb core 13, extending the isolation membrane to the outer edge of the thickness control block 7; Step 2.6: Lay a non-porous isolation film on the inner surface of the inner skin 14, extending the isolation film to the outer edge of the thickness control block 7, and then lay an adhesive film, which is 0-3mm larger than the periphery of the inner skin 14. Place the inner skin on the upper surface of the honeycomb core 13 and fix the outer skin 10, pad 12, reinforcing plate 11 and inner skin 14 by the part positioning pin 6. Step 2.7: Lay a non-porous isolation film on the upper surface of the inner skin 14, then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block 7, and use the pressure ring positioning pin 5 to position and connect the composite structure pressure ring and the metal base plate 1. Step 2.8 involves placing auxiliary materials, bagging and sealing, and autoclaving. Step 2.9: Remove the bag and take out the adhesive film that wraps the inner skin 14, honeycomb core 13, reinforcing plate 11, pad 12 and outer skin 10. Measure the thickness of the adhesive layer at the same position, add it to the thickness of the metal part, and compare it with the theoretical thickness of the component. Based on the comparison results, adjust the thickness of the peripheral thickness control block 7 with the thickness control adjustment piece 9.

Claims

1. A molding and bonding fixture for a basin-shaped core metal bonding component, characterized in that, The basin-shaped core metal adhesive component includes: outer skin (10), honeycomb core (13), and basin-shaped inner skin (14); the molding adhesive fixture includes: metal base plate (1), composite structure pressure ring, thickness control block (7), and thickness control block positioning pin (8). The metal base plate (1) is formed on the aerodynamic surface of the basin-shaped core metal adhesive component. The metal base plate (1) is used to fix and place the basin-shaped core metal adhesive component, which includes the metal outer skin (10), honeycomb core (13), and basin-shaped inner skin (14). The bottom end face of the basin-shaped inner skin (14) and the bonding transition area of ​​the metal outer skin (10) form a perimeter inclined platform of the component. The inner ring of the composite structure pressure ring has a clamping perimeter inclined platform. The clamping perimeter inclined platform is placed on the basin-shaped inner skin (14), so that the clamping perimeter inclined platform of the inner ring of the composite structure pressure ring and the component perimeter inclined platform of the outer ring of the basin-shaped inner skin (14) form an inclined surface fit, which is used to perform shape-preserving pressure transmission on the basin-shaped core metal adhesive component during the curing process. On the metal base plate (1), around the perimeter of the basin-shaped core metal adhesive component, multiple thickness control blocks (7) are fixedly arranged at intervals of a preset distance from the edge of the component. The thickness control blocks (7) are used to support the perimeter composite structure pressure ring so that it fits the surface of the basin-shaped core metal adhesive component. The gaps between the spaced thickness control blocks (7) are used to allow the overflow of adhesive inside the basin-shaped core metal adhesive component during the curing process.

2. The molding and bonding fixture for the basin-shaped core metal adhesive bonding component according to claim 1, characterized in that, The composite structure pressure ring includes: a metal pressure ring (2) and a rubber pressure transmission pad (4). The inner ring of the annular metal pressure ring (2) has a clamping perimeter inclined platform, which matches the profile of the component perimeter inclined platform in the bonding transition area of ​​the basin-shaped inner skin (14). The annular rubber pressure pad (4) is vulcanized and fixed to the clamping perimeter inclined platform and perimeter platform area of ​​the metal pressure ring (2) to form a composite structure pressure ring.

3. The molding and bonding fixture for the basin-shaped core metal adhesive bonding component according to claim 2, characterized in that, The theoretical distance t1 between the metal pressure ring (2) and the basin-shaped inner skin (14) in the composite structure pressure ring is the thickness of the rubber pressure transmission pad (4) under pressure. It is used to compensate for the gap between the metal pressure ring (2) and the basin-shaped inner skin (14) through the rubber pressure transmission pad (4) during the curing process and to uniformly transmit pressure. The metal pressure ring (2) and the rubber pressure pad (4) are pre-formed into an integrated structure through a vulcanization process to ensure that the planar area, R area and inclined area of ​​the rubber pressure pad (4) and the metal pressure ring (2) are completely adhered. The rubber pressure pad in the annular allowance area with a preset width inward from the edge of the metal pressure ring (2) is cut off to ensure that the annular allowance area of ​​the metal pressure ring (2) is in direct hard contact with the thickness control block (7) during the curing process.

4. The molding and bonding fixture for the basin-shaped core metal adhesive bonding component according to claim 3, characterized in that, The function of the rubber pressure pad (4) is to compensate for the gap between the metal pressure ring (2) and the basin-shaped inner skin (14) during the curing process, and the thickness t of the rubber pressure pad (4) decreases with the increase of pressure P; the initial thickness of the rubber pressure pad (4) in the molding adhesive jig, that is, the thickness in the unpressurized state, is H, and the thickness of the rubber pressure pad (4) in the pressurized state is calculated as follows: Calculate the compression of the rubber pressure pad (4), based on the following relationship between the compression (&) and the pressure (P): &=kH(1-eαp) Where & is the compression amount of the rubber pressure pad (4), H is the thickness of the rubber pressure pad (4) in the unpressurized state, P is the pressure in the autoclave, k is the material compression coefficient, and α is the pressure response coefficient. The thickness of the rubber pressure pad (4) under pressure in the autoclave is t1=H-&.

5. The molding and bonding fixture for the basin-shaped core metal adhesive bonding component according to claim 4, characterized in that, Each thickness control block (7) has a width not exceeding 15mm and a length not exceeding 50mm. Both ends of the thickness control block (7) are provided with Φ5mm pin holes for fixing to the metal base plate (1) by pins. The theoretical thickness t of each thickness control block (7) k Calculated as follows: t k =t P +t1-0.1mm; Among them, t k To control the theoretical thickness of the block (7), t p This represents the theoretical thickness of the metal-bonded component along the core of the basin-shaped plate.

6. The molding and bonding fixture for the basin-shaped core metal adhesive bonding component according to claim 4, characterized in that, Also includes: Uniform pressure plate (3); The pressure equalizing plate (3) is placed on the basin-shaped protrusion area of ​​the basin-shaped inner skin (14) to uniformly transmit pressure on the surface of the basin-shaped protrusion area of ​​the basin-shaped inner skin (14) during the curing process.

7. The molding and bonding fixture for the metal adhesive-bonded part with a basin-shaped core according to any one of claims 1 to 5, characterized in that, The composite structure pressure ring is connected to the metal base plate (1) through multiple pressure ring positioning pins (5); The metal base plate (1) has multiple Φ10mm blind holes. The composite structure pressure ring is connected to the Φ10mm blind holes on the metal base plate (1) by two Φ8mm positioning pins, which are used for lateral sliding and alignment of the composite structure pressure ring during the compression process. The metal base plate (1) has multiple Φ5mm blind pin holes 5mm inward from the periphery for mounting the thickness control block (7).

8. The molding and bonding fixture for the metal adhesive-bonded part with a basin-shaped core according to any one of claims 1 to 5, characterized in that, Also includes: Thickness adjustment piece (9); The thickness adjustment piece (9) is set between the thickness control block (7) and the metal base plate (1). The thickness adjustment piece (9) compensates for the actual thickness of the thickness control block (7). When using the compensation, the difference between the actual thickness and the theoretical thickness of the thickness control block (7) is superimposed.

9. A method for forming a basin-shaped core metal adhesive-bonded component, characterized in that, The molding method is performed using a molding and bonding fixture for a basin-shaped core metal bonded component as described in any one of claims 1 to 8, comprising: Step 1: Place 0-2 thickness control adjustment pieces (9) as needed at the position of the thickness control block (7) on the metal base plate (1) according to the surface detection data of the metal base plate (1), and then fix the thickness control block 9. Adjust the thickness to the sum of the theoretical thickness of the basin-shaped core metal adhesive component and the thickness of the rubber pressure pad (4) under pressure, and reduce it by 0.1mm. Step 2: Make a calibration membrane to check whether the thickness control block (7) or the thickness adjustment piece (9) of the thickness control block (7) meets the preset design thickness requirements; Step 3: First, remove the excess material from the molding adhesive jig. Then, lay a non-porous release film on the upper surface of the metal base plate (1). The release film extends to cover the outer edge of the thickness control block (7). Step 4: Place the outer skin (10) on the metal base plate (1) and lay the adhesive film on the outer skin (10). The adhesive film covers an area 0-3mm beyond the circumference of the outer skin (10). Cold-press to compact and remove air bubbles from the adhesive film. Step 5: Place pads (12) around the outer skin (10) in sequence, lay a film on the surface of the pads (12) and press it with cold to remove air bubbles, lay a reinforcing plate (11), lay a film on the surface of the reinforcing plate (11) and press it with cold to remove air bubbles. Step 6: Place the honeycomb core (13) filled with foam adhesive, lay the adhesive film on the inner surface of the basin-shaped inner skin (14), and use a scraper to press the adhesive film firmly to remove air bubbles. Place the adhesive film surface of the basin-shaped inner skin (14) on the upper surface of the honeycomb core (13), and use part positioning pins (6) to fix and connect the basin-shaped inner skin (14), pad (12), reinforcing plate (11) and outer skin (10). Step 7: Lay a non-porous isolation film on the upper surface of the basin-shaped inner skin (14), then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block (7), and use the pressure ring positioning pin (5) to position and connect the composite structure pressure ring and the metal base plate (1). Step 8: Place auxiliary materials, make bags and seal them, and cure them in an autoclave.

10. The molding method for the basin-shaped core metal adhesive component according to claim 9, characterized in that, Step 2 includes: Step 2.1: First remove the excess material on the molding and bonding fixture, and lay a non-porous release film on the surface of the molding and bonding fixture. The release film extends to cover the outer edge of the thickness control block (7). Step 2.2: Place the outer skin (10) according to the edge line of the part and the position of the positioning hole on the metal base plate (1) of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous isolation film on the surface of the outer skin (10), extend the isolation film to the outer edge of the thickness control block (7), then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the outer skin (10), and then place a layer of non-porous isolation film on the surface of the adhesive film extending to the outer edge of the thickness control block (7); Step 2.3: Place the pad (12) according to the edge line of the part and the position of the positioning hole on the metal base plate (1) of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the pad (12), extend the release film to the outer edge of the thickness control block (7), then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the pad (12), and then place a layer of non-porous release film on the surface of the adhesive film to the outer edge of the thickness control block (7); Step 2.4: Place the reinforcing plate (11) according to the edge line of the part and the position of the positioning hole on the metal base plate (1) of the molding adhesive jig, fix the position with pressure-sensitive adhesive tape, lay a non-porous release film on the surface of the reinforcing plate (11), extend the release film to the outer edge of the thickness control block (7), then place the adhesive film, the adhesive film is 0-3mm larger than the periphery of the reinforcing plate (11), and then place a layer of non-porous release film on the surface of the adhesive film to the outer edge of the thickness control block (7); Step 2.5, finally place the honeycomb core (13) and place a non-porous isolation membrane on the honeycomb core (13), the isolation membrane extending to the outer edge of the thickness control block (7); Step 2.6: Lay a non-porous isolation film on the inner surface of the inner skin (14), extending the isolation film to the outer edge of the thickness control block (7), and then lay an adhesive film, which is 0-3 mm larger than the periphery of the inner skin (14). Place the inner skin on the upper surface of the honeycomb core (13) and fix the outer skin (10), pad (12), reinforcing plate (11) and inner skin (14) by the part positioning pin (6). Step 2.7: Lay a non-porous isolation film on the upper surface of the inner skin (14), then place the composite structure pressure ring, check the contact surface between the composite structure pressure ring and the thickness control block (7), and use the pressure ring positioning pin (5) to position and connect the composite structure pressure ring and the metal base plate (1). Step 2.8 involves placing auxiliary materials, bagging and sealing, and autoclaving. Step 2.9: Remove the bag and take out the adhesive film that wraps the inner skin (14), honeycomb core (13), reinforcing plate (11), pad (12), and outer skin (10). Measure the thickness of the adhesive layer at the same location and add it to the thickness of the metal part. Compare it with the theoretical thickness of the component. Based on the comparison results, adjust the thickness of the peripheral thickness control block (7) using the thickness control adjustment piece (9).

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