Creep age forming device and method for high-rib component difficult to deform

Abstract

The invention provides a creep age forming device and method for a high-rib component difficult to deform. The forming device comprises a supporting base, a mold plate and two supporting baffles. The die plate is fixed to the supporting base, and the working face of the die plate is provided with a die molded surface area matched with the target molded surface of the high-rib component difficult to deform. The length direction of the mold molded surface area corresponds to the skin thickness change direction of the difficult-to-deform high-rib component, and the working surface is the surface, away from the supporting seat, of the mold plate; the two supporting baffles are arranged on the working face, the bottoms of the supporting baffles are attached to the working face, and the supporting baffles are located on the outer sides of the two ends of the mold profile area in the length direction. The two supporting baffles and the corresponding ends on the mold surface area have proper distances, so that proper gaps are formed between the two ends of the blank and the two supporting baffles, interference between the blank and the supporting baffles during creep aging treatment is avoided, and therefore the blank can be bent to be attached to the mold surface area, and a prepared product component has the high percent of pass.

Description

Technical Field

[0001] The invention relates to the field of plastic forming processing of metal components, and in particular to a creep aging forming device and method for difficult-to-deform high-rib components. Background Art

[0002] Large thin-walled components are key load-bearing components for high-end equipment such as aerospace and defense weapons. Their precise forming is extremely important for component assembly and service performance. Creep aging forming technology is a technology that utilizes the creep, stress relaxation and aging strengthening characteristics of aluminum alloys to complete the shape forming of components and improve material properties in the same equipment. It is particularly suitable for high-quality forming of large thin-walled components.

[0003] At present, this process is mainly used for thin-walled plates or ribbed components with small or complex curvatures, and the overall stiffness is relatively uniform. The flat blank after thick plate machining can gradually fit the mold surface under the action of vacuum load, and then be heated and maintained for a period of time to form. However, with the increasing requirements for lightweight structures in aerospace, defense weapons and other fields, structural designs driven by service performance have led to increasingly complex thin-walled components. The skin thickness of some difficult-to-deform high-rib components, such as large thin-walled components, varies greatly, ranging from 3mm to 50mm. The conventional creep aging forming method has a low forming qualification rate for such components. Summary of the invention

[0004] The main purpose of the present invention is to provide a creep aging forming device and method for difficult-to-deform high-rib components, so as to solve the technical problem of low pass rate of conventional creep aging forming methods for thin-walled components with large skin thickness differences.

[0005] To achieve the above-mentioned purpose, the present invention provides a creep aging forming device for a difficult-to-deform high-rib component, comprising: Support seat.

[0006] The mold plate is fixed on the support seat, and the working surface of the mold plate has a mold surface area that matches the target surface of the difficult-to-deform high-rib component. The length direction of the mold surface area corresponds to the direction of change of the skin thickness of the difficult-to-deform high-rib component, and the working surface is the surface of the mold plate away from the support seat.

[0007] Two support baffles are arranged on the working surface, the bottoms of the two support baffles are in contact with the working surface, and are respectively located outside the two ends of the mold surface area along the length direction. The space surrounded by the two support baffles and the mold plate forms a mold forming space. And the distance between any of the support baffles and the corresponding end on the mold surface area is 3 to 25 mm.

[0008] According to an embodiment of the present application, the outer side surface of any of the support baffles has a plurality of staggered reinforcing ribs.

[0009] According to an embodiment of the present application, the creep aging forming device for difficult-to-deform high-rib component further includes a filling structure.

[0010] The filling structure is filled in the mesh formed by the staggered arrangement of the reinforcing ribs.

[0011] Alternatively, the filling structure is fixed to the outer side surface of the support baffle and closes the mesh formed by the staggered arrangement of the reinforcing ribs.

[0012] According to the implementation of the present application, the two support baffles are vertically arranged on the working surface, the working surface of the mold plate is provided with blind bolt holes, and the support baffles are fixed by bolts in cooperation with the blind bolt holes. The thickness of the mold plate after the blind bolt holes are provided is ≥8mm.

[0013] According to an embodiment of the present application, at least one of the two ends of the mold profile area on the working surface is provided with more than two rows of blind bolt holes, and the more than two rows of blind bolt holes are provided along the length direction of the mold profile area.

[0014] According to an embodiment of the present application, the support seat includes a transverse clamping plate and a longitudinal clamping plate, and the transverse clamping plate and the longitudinal clamping plate are buckled to form an arc-shaped seat structure that cooperates with the mold plate.

[0015] The creep aging forming device for difficult-to-deform high-rib components also includes a square frame arranged in the support seat, the square frame extends along the length direction and is close to the edge position of the mold surface area in the width direction.

[0016] According to an embodiment of the present application, the working surface of the mold plate has two fixing areas for fixing the vacuum bag film, and the two fixing areas are respectively located on the outer sides of the two supporting baffles.

[0017] The working surface has markings for positioning in the length direction and / or width direction at four corners in the mold profile area.

[0018] The present application also provides a creep aging forming method for a difficult-to-deform high-rib component, comprising the following steps: A blank corresponding to a difficult-to-deform high-rib component is placed on the mold forming space in the above-mentioned difficult-to-deform high-rib component creep aging forming device, wherein the direction in which the skin thickness of the blank changes is consistent with the length direction of the mold profile area, and the first distance between the thick end of the blank and the support baffle is greater than the second distance between the thin end of the blank and the support baffle.

[0019] The blank is covered with a vacuum bag film to seal the mold forming space, and vacuum is drawn to obtain a blank mold seal.

[0020] The blank mold seal is placed in an autoclave at elevated pressure and temperature for creep aging treatment to obtain a high-rib component that is difficult to deform.

[0021] According to an implementation of the present application, the first distance is 2 to 3 times the second distance.

[0022] According to an embodiment of the present application, the step of covering the blank with a vacuum bag film and sealing the mold forming space includes: Under the condition that the outer side surfaces of the two support baffles are flat surfaces, the blank is covered with a vacuum bag film and is attached to the surrounding surfaces of the mold forming space by high-temperature adhesive. In the longitudinal direction of the mold forming space, the vacuum bag film is fixed on the area on the working surface outside the support baffle.

[0023] In the above-mentioned creep aging forming device for difficult-to-deform high-rib components, a support baffle whose bottom is fitted with the working surface is provided. During the creep aging forming process, vacuuming can prevent the vacuum bag film from entering the blank and the mold surface area, and prevent the vacuum bag from being torn by the huge air pressure load, resulting in experimental failure; after the support baffle is designed, the vacuum bag is fitted to the outer surface of the support baffle. Under the action of the air pressure load, the plate gradually bends to fit the mold surface and reaches a relatively ideal vacuum degree, which is conducive to subsequent creep aging treatment. In addition, the two support baffles are at a suitable distance from the corresponding ends on the mold surface area, so that there is a suitable gap between the two ends of the blank and the two support baffles, avoiding the problem of interference with the support baffles caused by torsional deformation of the blank due to different stiffness in different areas. Therefore, the blank can be smoothly bent to fit the mold surface area, so that the prepared product components have a high pass rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a creep aging forming device for a difficult-to-deform high-rib component according to an embodiment of the present application; Figure 2 It is a cross-sectional structural schematic diagram of a creep aging forming device for a difficult-to-deform high-rib component in use according to an embodiment of the present application; Figure 3 yes Figure 2 A local enlarged schematic diagram of point A; Figure 4 yes Figure 2 A local enlarged schematic diagram of point B; Figure 5 It is a schematic cross-sectional structure diagram of a creep aging forming device for a difficult-to-deform high-rib component according to one embodiment of the present application.

[0026] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings.

[0027] 100, support seat; 200, mold plate; 300, support baffle; 400, blank; 110, square frame; 210, working surface; 220, mold surface area; 310. Reinforcement ribs; 320. Mesh. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications (such as up, down, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0031] Furthermore, the technical solutions between the various embodiments of the present invention may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in the field. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The reason why the qualified rate of components with large differences in skin thickness is low is mainly due to the large difference in stiffness of the blank structure, which makes it difficult for the flat blank to fit the mold surface under the action of air pressure loading, and the blank will deform and twist during the loading process, resulting in dimensional deviations of the components, resulting in low qualified rate and the need for large-area shape correction.

[0033] Based on this, an embodiment of the present invention provides a creep aging forming device for a difficult-to-deform high-rib component, see Figure 1~Figure 4 , comprising a support seat 100, a mold plate 200 and two support baffles 300. The mold plate 200 is fixed on the support seat 100, and the working surface 210 of the mold plate 200 has a mold profile area 220 that matches the target profile of the difficult-to-deform high-rib component. The length direction of the mold profile area 220 corresponds to the direction of change of the skin thickness of the difficult-to-deform high-rib component, and the working surface 210 is the surface of the mold plate 200 away from the support seat 100.

[0034] The support base 100 is a hollow metal frame structure or a solid metal body structure, which is not specifically limited. In some embodiments, the structure of the hollow metal frame structure includes one or more of a metal tube, a metal rod or a metal plate. One or more of the above structural members are fixedly connected (such as one or more of welding, clamping or threading) to form a metal frame structure.

[0035] In some specific embodiments, see Figure 5 The support seat 100 includes a transverse clamping plate and a longitudinal clamping plate, and the transverse clamping plate and the longitudinal clamping plate are buckled to form an arc-shaped seat structure that cooperates with the mold plate 200.

[0036] The frame structure is mainly formed by welding and snapping together a longitudinal card plate with holes and a transverse card plate structure. This type of support base 100 is more convenient to install, uses less material, and has better thermal stability.

[0037] The bottom surface of the mold plate 200 is fixed to the top surface of the support seat 100. Part of the top surface (i.e., the working surface 210) of the mold plate 200 is the mold profile area 220 of the difficult-to-deform high-rib component, that is, the area where the mold function is mainly exerted. Therefore, the mold profile area 220 matches the target profile of the difficult-to-deform high-rib component. Since most difficult-to-deform high-rib components are curved, the mold profile area 220 is also curved. Correspondingly, the top surface of the support seat 100 is an arc-shaped structure.

[0038] The length direction of the mold profile area 220 corresponds to the direction of change of the skin thickness of the difficult-to-deform high-rib component. The thick end and the thin end of the component to be subsequently formed are both located in the length direction of the mold profile.

[0039] For example, the working surface 210 of the mold plate 200 is roughly processed by rolling and bending a thick plate, and then welded to the support seat 100, and then the mold surface area 220 or the entire area of ​​the working surface 210 is finely processed.

[0040] The working surface 210 is larger than the mold profile area 220 , and includes an area connected to the support baffle 300 . In some embodiments, the work surface 210 also includes a fixing area located on the working surface 210 away from the support baffle 300 .

[0041] Two support baffles 300 are arranged on the working surface 210. The bottoms of the two support baffles 300 are in contact with the working surface 210 and are respectively located outside the two ends of the mold profile area 220 along the length direction. The space surrounded by the two support baffles 300 and the mold plate 200 forms a mold forming space. The distance between any of the support baffles 300 and the corresponding end on the mold profile area 220 is 3 to 25 mm.

[0042] The bottom of the support baffle 300 is in contact with the working surface 210, and there is no gap or cavity between the bottom of the support baffle 300 and the working surface 210. The two support baffles 300 are distributed along the length direction of the working surface 210, and are both located outside the two ends of the mold profile area 220, and are a certain distance away from the corresponding ends. That is, the distance between the two support baffles 300 along the length direction is greater than the length of the mold profile area 220. In the subsequent creep aging forming process, there is a suitable gap between the two ends of the blank 400 and the two support baffles 300. The space surrounded by the two support baffles 300 and the mold plate 200 forms a mold forming space. The bottom of the mold forming space is slightly larger than the mold profile area 220.

[0043] The blank 400 is a raw material plate for a high-rib component that is difficult to deform, so it is a variable-thickness high-rib wall plate. Due to its excessive rigidity, the blank 400 cannot be completely bent to fit the mold surface (especially the thick end of the blank 400) through vacuum loading in a sealed vacuum bag. If a traditional creep aging forming mold structure is used, a cavity will be formed between the side of the blank 400 and the mold, causing the vacuum film bag to be sucked into the cavity. If the vacuum bag ruptures under the continuous vacuuming action, the bent blank 400 will rebound instantly, which may injure the operator. If the vacuuming is stopped, the vacuum degree of the vacuum film bag will be insufficient, and the blank 400 will not fit the mold surface well.

[0044] Therefore, in order to solve the above problems, the present application innovatively proposes to use a support baffle 300 structure on both sides of the mold surface area 220, and then use a vacuum bag film to cover the blank 400 and stick it (such as by high-temperature adhesive) on the surrounding surface of the mold forming space. Since there is no gap or cavity between the bottom of the support baffle 300 and the working surface 210, during vacuum loading, the vacuum bag film is adsorbed on the outer surface of the support baffle 300 during the bending process of the blank 400, which can increase the vacuum pressure, so that it will not break, improve safety, and achieve a relatively ideal vacuum degree, which is conducive to subsequent creep aging treatment.

[0045] In some embodiments, the vacuum bag film is not adsorbed onto the support base 100 to prevent the vacuum bag film from being sucked into the holes on the support base 100 and causing problems similar to the vacuum film bag being sucked into the cavity.

[0046] Similarly, since the thickness of the skin in the high-rib blank 400 structure varies greatly, and the skin thickness is not evenly and symmetrically distributed, the skin thickness near one of the support baffles 300 is greater, while the skin thickness at the other end is smaller. Under the action of air pressure loading, the blank 400 at one end with a smaller thickness and weaker rigidity is easy to bend, while the other end with a larger thickness and stronger rigidity is difficult to bend, and the blank 400 presents an inclined bending state, such as Figure 1 As the air pressure load in the autoclave increases further, the inclined and bent blank 400 will interfere with the support baffle 300, and the blank 400 cannot be bent to fit the mold surface.

[0047] Therefore, when the blank 400 is placed on the mold, the gap between the two ends of the blank 400 and the support baffle 300 is very important. Generally speaking, the gap between the end of the blank 400 with a small thickness and weak rigidity and the support baffle 300 is small, while the gap between the end of the blank 400 with a large thickness and strong rigidity and the support baffle 300 is large. Through the reasonable distribution of the above gaps, the blank 400 can be bent and loaded to fit the mold under the air pressure load. Then the mold as a whole enters the autoclave, and the temperature and pressure are increased and maintained for a period of time, creep and stress relaxation occur, and the forming process is completed.

[0048] In the above-mentioned creep aging forming device for high-rib components that are difficult to deform, a support baffle 300 is provided, the bottom of which is in contact with the working surface 210. During the creep aging forming process, vacuuming can prevent the vacuum bag film from entering the blank 400 and the mold surface area 220, so that it can reach a relatively ideal vacuum degree, which is conducive to the subsequent creep aging treatment. In addition, the two support baffles 300 are at a suitable distance from the corresponding ends on the mold surface area 220, so that there is a suitable gap between the two ends of the blank 400 and the two support baffles 300, avoiding the blank 400 from interfering with the support baffles 300 during the creep aging treatment. Therefore, the blank 400 can be bent to fit the mold surface area 220, so that the prepared product components have a higher pass rate.

[0049] In some embodiments, see Figure 1~Figure 4 , the outer side surface of any of the support baffles 300 has a plurality of staggered reinforcement ribs 310. In this embodiment, since the vacuum load and the air pressure load in the autoclave can reach a maximum of 2MPa, a great pressure will be exerted on the support baffle 300 structure and the mold surface, so the support baffle 300 structure has a relatively large thickness, such as more than 30mm. Then the outer surface is processed into a grid reinforcement rib 310 structure, and the inner surface is a plane.

[0050] This design not only improves the strength of the support baffle 300, but also facilitates heat conduction. For example, when it is placed in an autoclave, the thickness of the support baffle 300 at the mesh 320 is relatively thin, which improves the efficiency of heat conduction.

[0051] In some embodiments, the creep aging forming device for a high-rib component with difficulty in deformation further comprises a filling structure. The filling structure is filled in the mesh 320 formed by the staggered arrangement of the reinforcing ribs 310 .

[0052] The outer side surface of the support baffle 300 has a grid structure. During the vacuuming process, the vacuum bag film may fall into the mesh holes 320 of the grid structure, thereby increasing the resistance of the vacuum bag film to move toward the mold forming space. This may cause the vacuum bag film to be difficult to move toward the mold forming space, such as sinking downward and sticking to the support baffle 300 or the blank 400.

[0053] Therefore, a filling structure is provided in this embodiment. The filling structure is filled in the mesh 320, and the mesh 320 is filled completely or only partially, such as the top is not filled to reduce its depth, or the edge of the mesh 320 is not filled. In this way, during the vacuuming process, the resistance of the vacuum bag film to move toward the mold forming space is reduced, which is conducive to the vacuum bag film moving toward the mold forming space, such as sinking downward and fitting on the support baffle 300 or the blank 400, thereby obtaining a higher vacuum degree and improving the qualified rate of the final product components.

[0054] Exemplarily, the material of the filling structure is silica gel.

[0055] In some embodiments, the filling structure is fixed to the outer side of the support baffle 300 and closes the mesh 320 formed by the staggered arrangement of the reinforcing ribs 310 .

[0056] Similarly, the filling structure is a plate, and the plate closes the mesh 320 formed by the staggered arrangement of the reinforcing ribs 310. During the vacuuming process, the resistance of the vacuum bag film to move toward the mold forming space is reduced, which is conducive to the vacuum bag film moving toward the mold forming space, such as sinking downward and fitting on the support baffle 300 or the blank 400, thereby obtaining a higher vacuum degree and improving the qualified rate of the final product components.

[0057] In some embodiments, see Figure 1~Figure 4 The two support baffles 300 are vertically arranged on the working surface 210. The working surface 210 of the mold plate 200 is provided with a blind bolt hole. The support baffles 300 are fixed by bolts in cooperation with the blind bolt holes. The thickness of the mold plate 200 after the blind bolt holes are provided is ≥8mm.

[0058] This design can ensure that the minimum thickness of the mold surface area 220 is still above 8-10 mm after the blind bolt hole is opened, ensuring that the mold surface area 220 does not leak under high temperature and high pressure.

[0059] Exemplarily, 20 to 25 bolt blind holes with a diameter of 10-12 mm are opened on the mold surface at the support baffle 300; the positions of the bolt blind holes are mainly designed according to the outer grid of the support baffle 300, and two bolt blind holes are staggered and designed at each outer grid of the support baffle 300 to increase the strength of the support baffle 300 under air pressure.

[0060] In some embodiments, see Figure 1~Figure 4 At least one of the two ends of the mold profile area 220 on the working surface 210 is provided with more than two rows of blind bolt holes. The more than two rows of blind bolt holes are arranged along the length direction of the mold profile area 220 .

[0061] Since large thin-walled components in the aerospace field are generally small-batch production of parts under specific circumstances, and large creep forming molds are expensive, in order to save mold costs, a mold surface area 220 suitable for two or more blanks 400 with different axial lengths is designed.

[0062] This requirement can be met by adjusting the support baffle 300 at either end, or by adjusting the support baffles 300 at both ends at the same time. Taking the adjustment of the support baffle 300 at one end as an example, a row of blind bolt holes for fixing the support baffle 300 is opened at one end of the mold surface area 220, and two rows of blind bolt holes for fixing the support baffle 300 are opened at the other end of the mold surface. When another axial length high-rib blank 400 needs to be formed, it is only necessary to remove the support baffle 300 and fix it to another row of blind bolt holes.

[0063] In some embodiments, see Figure 1~Figure 4 The creep aging forming device for the difficult-to-deform high-rib component also includes a square frame 110 arranged in the support seat 100, and the square frame 110 extends along the length direction and is close to the edge position of the mold surface area 220 in the width direction.

[0064] The creep aging forming device for difficult-to-deform high-rib components is suitable for preparing difficult-to-deform high-rib components with external ribs, and is also suitable for preparing difficult-to-deform high-rib components with internal ribs.

[0065] When preparing a high-rib component with external ribs that is difficult to deform, a variable-thickness high-rib flat blank 400 is initially placed on a mold, and the ribs at both ends of the blank 400 will contact the mold profile, and then gradually bend under the vacuum pressure load. At this time, the ribs at both ends that contact the mold profile are subjected to huge friction, and the mold profile here is the place where the force and deformation are the greatest. In order to increase the stability of the mold profile, two square frames 110, such as square tubes, are added to the bottom frame of the force-bearing area at both ends of the mold profile.

[0066] In some embodiments, see Figure 1~Figure 5 The mold plate 200 also includes two outer edges extending in the length direction. The two outer edges are located on both sides of the working surface 210 in the width direction, and can provide a bonding and fixing area for the vacuum bag film in the length direction.

[0067] In some embodiments, the working surface 210 of the mold plate 200 has two fixing areas for fixing the vacuum bag film, and the two fixing areas are respectively located outside the two supporting baffles 300. The working surface 210 has marks in the mold surface area 220 for positioning in the length direction and / or width direction.

[0068] The fixing area can increase the bonding area between the vacuum bag film and the working surface 210, so that bonding is more convenient and more secure. There are many forms of markings, such as a cross, a right angle, a scale line, etc. Setting the markings helps to more accurately adjust the distance between the two ends of the blank 400 and the support baffle 300.

[0069] The present application also provides a creep aging forming method for a difficult-to-deform high-rib component, comprising the following steps: S100: Place the blank 400 corresponding to the difficult-to-deform high-rib component on the mold forming space in the above-mentioned difficult-to-deform high-rib component creep aging forming device, wherein the direction of change of the skin thickness of the blank 400 is consistent with the length direction of the mold surface area 220, and the first distance between the thick end of the blank 400 and the support baffle 300 is greater than the second distance between the thin end of the blank 400 and the support baffle 300.

[0070] In this step, the creep aging forming device for the difficult-to-deform high-rib component is the creep aging forming device for the difficult-to-deform high-rib component in any of the above embodiments.

[0071] S200: Cover the blank 400 with a vacuum bag film, seal the mold forming space, and evacuate to obtain a blank 400 mold seal.

[0072] For the specific operation steps, please refer to the above content, and adopt different covering and sealing methods according to the different structures of the creep aging forming device for difficult-to-deform high-rib components.

[0073] S300: placing the blank 400 mold seal in an autoclave, increasing the pressure and temperature to perform creep aging treatment, and obtaining a high-rib component that is difficult to deform.

[0074] For example, the blank 400 mold seal enters the autoclave as a whole, and is heated and pressurized and maintained for a period of time, so that creep and stress relaxation occur, and the forming process is completed. Specifically, there is no requirement for creep aging treatment parameters, which can be set according to simulation experiment results.

[0075] In the above-mentioned creep aging forming method for difficult-to-deform high-rib components, since the above-mentioned creep aging forming device for difficult-to-deform high-rib components is adopted, it has similar technical effects and will not be described in detail.

[0076] In some embodiments, the first distance is 2 to 3 times the second distance. In this embodiment, through the reasonable distribution of the above gaps, the blank 400 can be bent and loaded to fit the mold under the air pressure load.

[0077] In some embodiments, the step of covering the blank 400 with a vacuum bag film to seal the mold forming space includes: Under the condition that the outer side surfaces of the two support baffles 300 are flat surfaces, the blank 400 is covered with a vacuum bag film and is attached to the surrounding surfaces of the mold forming space by high-temperature adhesive. In the longitudinal direction of the mold forming space, the vacuum bag film is fixed on the area on the working surface 210 located outside the support baffles 300.

[0078] In this embodiment, the resistance of the vacuum bag film to the mold forming space is reduced, which is conducive to the vacuum bag film moving into the mold forming space, such as sinking downward and fitting onto the support baffle 300 or the blank 400, thereby obtaining a higher vacuum degree and improving the qualified rate of the final product components.

[0079] The above technical solutions of the present invention are only preferred embodiments of the present invention, and the patent scope of the present invention is not limited thereto. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A creep aging forming device for difficult-to-deform high-rib components, characterized in that: include: Support seat; A mold plate is fixed on the support seat, and a working surface of the mold plate has a mold profile area that matches a target profile of a difficult-to-deform high-rib component; The length direction of the mold profile area corresponds to the direction of change of the skin thickness of the difficult-to-deform high-rib component, and the working surface is the surface of the mold plate away from the support seat; Two support baffles are arranged on the working surface, the bottoms of the two support baffles are in contact with the working surface, and are respectively located on the outer sides of the two ends of the mold surface area along the length direction; the space surrounded by the two support baffles and the mold plate forms a mold forming space; and the distance between any support baffle and the corresponding end on the mold surface area is 3~25 mm.

2. The creep aging forming device for difficult-to-deform high-rib components according to claim 1 is characterized in that: The outer side surface of any of the support baffles has a plurality of reinforcing ribs arranged in a staggered manner.

3. The creep aging forming device for difficult-to-deform high-rib component according to claim 2 is characterized in that: The creep aging forming device for difficult-to-deform high-rib component also includes a filling structure; The filling structure is filled in the mesh formed by the staggered arrangement of the reinforcing ribs; Alternatively, the filling structure is fixed to the outer side surface of the support baffle and closes the mesh formed by the staggered arrangement of the reinforcing ribs.

4. The creep aging forming device for difficult-to-deform high-rib component according to claim 1 is characterized in that: The two support baffles are both vertically arranged on the working surface, the working surface of the mold plate is provided with a bolt blind hole, and the support baffles are fixed by bolts in cooperation with the bolt blind holes; the thickness of the mold plate after the bolt blind holes are provided is ≥8mm.

5. The creep aging forming device for difficult-to-deform high-rib component according to claim 4 is characterized in that: At least one of the two ends of the mold profile area on the working surface is provided with more than two rows of bolt blind holes; the more than two rows of bolt blind holes are arranged along the length direction of the mold profile area.

6. The creep aging forming device for difficult-to-deform high-rib component according to claim 5 is characterized in that: The support seat comprises a transverse clamping plate and a longitudinal clamping plate, and the transverse clamping plate and the longitudinal clamping plate are buckled to form an arc-shaped seat structure that matches the mold plate; The creep aging forming device for difficult-to-deform high-rib components also includes a square frame arranged in the support seat, the square frame extends along the length direction and is close to the edge position of the mold surface area in the width direction.

7. The creep aging forming device for difficult-to-deform high-rib component according to claim 1 is characterized in that: The working surface of the mold plate has two fixing areas for fixing the vacuum bag film, and the two fixing areas are respectively located on the outer sides of the two supporting baffles; The working surface has markings for positioning in the length direction and / or width direction at four corners in the mold profile area.

8. A creep aging forming method for a difficult-to-deform high-rib component, characterized in that: The following steps are involved: Placing a blank corresponding to a difficult-to-deform high-rib component on a mold forming space in a creep aging forming device for difficult-to-deform high-rib components according to any one of claims 1 to 7, wherein a direction in which the skin thickness of the blank changes is consistent with a length direction of the mold profile area, and a first distance between a thick end of the blank and a support baffle is greater than a second distance between a thin end of the blank and the support baffle; Covering the blank with a vacuum bag film, sealing the mold forming space, and evacuating the blank to obtain a blank mold seal; The blank mold seal is placed in an autoclave at elevated pressure and temperature for creep aging treatment to obtain a high-rib component that is difficult to deform.

9. The creep aging forming method for difficult-to-deform high-rib component according to claim 8, characterized in that: The first distance is 2 to 3 times the second distance.

10. The creep aging forming method for difficult-to-deform high-rib component according to claim 8, characterized in that: The step of covering the blank with a vacuum bag film to seal the mold forming space comprises: Under the condition that the outer side surfaces of the two support baffles are flat surfaces, the blank is covered with a vacuum bag film and is adhered to the surrounding surfaces of the mold forming space by high-temperature glue; wherein, in the length direction of the mold forming space, the vacuum bag film is fixed on the area of ​​the working surface located outside the support baffles.

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