Large-size thin-wall curved surface skin heat treatment deformation control device

Abstract

The invention discloses a heat treatment deformation control device for a large-size thin-wall curved surface skin. The heat treatment deformation control device comprises a concave tool supporting plate, a convex tool supporting plate, a drawer type first slide way, a drawer type second slide way, a universal supporting frame, a quick insertion type limiting plate, a quick insertion type skin clamping fixture and a fine adjustment screw rod. The fixture can position the thin-wall curved surface skin, control the clamping pressure of the fixture and control deformation of a skin part in heat treatment so as to meet the requirements of a production process. The method can be widely applied to heat treatment procedures such as solid solution and aging at the temperature of 600 DEG C or below. In the heat treatment process of the skin, the clamp can achieve the shaping and shaping effects, the manual beating shaping link in the original technology is omitted, the equipment replaces manual work to conduct skin shape correction, it is guaranteed that the skin surface appearance is attractive, the production cost is reduced, the production efficiency is improved, and the forming quality consistency is good.

Description

Technical Field

[0001] The present invention relates to the technical field of heat treatment deformation control, and in particular to a heat treatment deformation control device for a large-size thin-walled curved surface skin. Background Art

[0002] As a key component of the aircraft body structure, the skin is one of the core parts. The heat treatment of the skin is one of the most important links in the skin production process. The film degree of the skin (also known as the fit or fit quality) directly affects the appearance quality and safety of the product. Aluminum alloy thin-walled skin is very easy to deform during the heat treatment process, and its main characteristics are the curling or bending of the corners, which will affect the subsequent process. At present, the industry mostly uses the manual hammering method, that is, the installation riveting process is completed in two steps: (1) After the skin heat treatment is cooled to room temperature, the worker uses a hammer to hammer the curled part of the skin to ensure that it is fit during installation. (2) The skin and rivets are positioned and riveted. This shaping method has poor appearance and the entire process is manual hammering, which will be affected by various human factors, such as the worker's technical operation level, proficiency, fatigue level, etc., which directly affect the performance and quality consistency of the product quality. For the shaping of large quantities of skin, this method is inefficient and has poor quality stability. Summary of the Invention

[0003] According to the production characteristics of skin products, a thin-walled curved surface heat treatment deformation control device is designed to fix the skin during the heat treatment process and control local deformation to improve product quality and production efficiency and reduce production costs. It will have broad application prospects in related industries.

[0004] In order to solve the deformation problems such as corner warping or bending during the existing skin heat treatment process, the present invention provides a large-scale thin-walled curved surface skin heat treatment deformation control device.

[0005] According to one aspect of the present application, a large-size thin-walled curved surface skin heat treatment deformation control device is provided, including a concave tooling support plate 1, a drawer-type first slide 2, a drawer-type second slide 3, a convex tooling support plate 4, a universal support frame 5, a quick-insert skin clamping fixture 6, a quick-insert limit plate 7, and a fine-tuning screw 8.

[0006] The concave tooling support plate 1 and the convex tooling support plate 4 are integrally cast and then split into sections. The drawer-type first slide 2 is fixed to the bottom 1 of the concave tooling support plate. The drawer-type first slide 2 is in contact and sliding connection with the drawer-type second slide 3. The drawer-type second slide 3 is fixed to the bottom 4 of the convex tooling support plate. The concave tooling support plate 1 and the convex tooling support plate 4 can be opened and closed through the two slides.

[0007] A plurality of universal support frames 5 are installed above the tooling support plate 1, including a universal joint fork 501, a T-shaft 502, a telescopic rod sleeve 504, a telescopic rod 505, and a hand-tightened screw nut 503;

[0008] The universal support frame 5 is placed on the upper surface of the concave tooling support plate 1 and the convex tooling support plate 4;

[0009] The universal joint fork 501 includes a universal joint fork 5011 and a universal joint fork 5012;

[0010] The T-axis 502 includes a T-axis 5021 and a T-axis 5022;

[0011] The hand screw nut 503 includes a hand screw nut 5031 and a hand screw nut 5032;

[0012] The universal joint fork 5011 of the universal support frame 5 is connected to the support plate, the T-shaft 5021 is inserted into the slot of the universal joint fork 5011, and is fixed on both sides by hand-tightening the screw nuts 5031;

[0013] The telescopic rod sleeve 504 is mounted on the top of the T-axis 5021, and the telescopic rod 505 is placed inside the telescopic rod sleeve 504. The telescopic rod 505 and the telescopic rod sleeve 504 can be adjusted to achieve linear motion.

[0014] The T-shaft 5022 is placed at the top of the telescopic rod 505, the T-shaft 5022 is inserted into the slot of the universal joint fork 5012, and is fixed on both sides by hand screw nuts 5032. The hand screw nuts 5031 and the hand screw nuts 5032 are at a 90° angle to form a universal support frame 5 structure.

[0015] The quick-insert skin clamping fixture 6 is mounted on the upper end of the universal support frame 5. Multiple sets of universal support frames 5 are installed at the edge of the tooling support plate. The skin 9 is clamped and secured using multiple sets of quick-insert skin clamping fixtures 6. The shape and size of the quick-insert skin clamping fixture and the quick-insert stop plate match the shape of the skin. The skin is placed flatly on the surface of the stop plate.

[0016] The quick-insert limit plate 7 is installed on the top of the universal support frame 5 at the center position;

[0017] The surface of the quick-insertion limiting plate 7 is fitted with the skin 9;

[0018] The concave tooling support plate 1 and the convex tooling support plate 4 have the same thickness, and their bottom surfaces remain horizontal during movement to ensure the balance of the equipment.

[0019] The number of universal support frames 5 on the concave tooling support plate 1 and the convex tooling support plate 4 can be increased or decreased according to the shape and size of the skin 9. The spacing between the universal support frames 5 is controlled in the range of 100-1500mm to meet the support requirements for thin-walled curved skins of aircraft of multiple sizes and control deformation during heat treatment.

[0020] The T-shaft 502 and the universal joint fork 501 are fixed by hand-tightening screw nuts 503 to prevent unnecessary displacement during operation, and to adjust the angle and distance between the quick-insert skin clamping fixture 6 and the tooling support plate.

[0021] The skin 9 is fixed and clamped by the quick-insert skin clamping fixture 6 and the quick-insert limiting plate 7, so that the shaping process and the heat treatment process for controlling deformation are combined.

[0022] The quick-insert skin clamping fixture 6 applies downward pressure to the skin 9 by adjusting the fine-tuning screw 8 through a digital torque meter.

[0023] The quick-insert skin clamping fixture uses a fine-tuning screw to fasten the skin. The other end of the fine-tuning screw is provided with a circular anti-slip piece to ensure accurate and high-quality processing of the skin. The rear end of the inner part of the skin clamp clamping block is provided with anti-slip grooves.

[0024] Use a torque meter to apply torque to the fine-tuning screw to monitor and analyze the torque readings, monitor the pressure head data, and make adjustments based on the process quality book to ensure that the pressure of the clamping mechanism on the skin meets the production process requirements.

[0025] The quick-insertion limiting plate 7 is a replaceable structure to completely fit with aircraft curved skins of different sizes and shapes. The curvature range of the quick-insertion limiting plate 7 is 180-45° and the radius is 50-1000 mm.

[0026] The entire equipment is placed in a heat treatment furnace for heat treatment. This equipment is suitable for various heat treatment processes such as solution treatment and aging treatment.

[0027] According to another aspect of the present application, a method for heat treating thin-walled curved surface skin using the above-mentioned large-scale thin-walled curved surface skin heat treatment deformation control device is provided, comprising the following implementation steps:

[0028] Step 1: Separate the concave tooling support plate 1 and the convex tooling support plate 4 through a slide, and select a quick-insert limit plate 7 with the same curvature as the surface to be processed;

[0029] Step 2: Place the skin 9 on the quick-insert limit plate 7 until it fits perfectly, adjust the height and angle of the universal support frame 5, and combine the concave tooling support plate 1 and the convex tooling support plate 4 so that the edges and corners of the skin 9 are placed in the skin clamping fixture 6;

[0030] Step 3: Use the digital torque meter to adjust the fine-tuning screw 8 so that it generates a downward force of 1 to 500N on the skin 9.

[0031] Step 4: Place the entire device in a heat treatment furnace and keep it warm at a temperature below 600°C for 15 to 180 minutes. After the insulation is completed, place the entire device in water at 25 to 100°C for rapid cooling.

[0032] Step 5: After cooling, natural aging or artificial aging is carried out according to the requirements of the skin. The natural aging time is 1-15 days, the artificial aging temperature is 80-220℃, and the insulation time is 1-50h.

[0033] Alternatively, the heat is maintained at a temperature below 600°C for 15 to 180 minutes. After the heat is maintained, the entire piece is placed in water at 25 to 100°C for rapid cooling. After cooling, natural aging or artificial aging is performed according to the requirements of the skin. Natural aging takes 1 to 15 days, while artificial aging is performed at a temperature of 80 to 220°C and a holding time of 1 to 50 hours.

[0034] The beneficial effects of the present invention are:

[0035] (1) The device used in the present invention has strong applicability and is suitable for fixing various types of thin-walled curved aluminum alloy skins of different lengths and widths and complex shapes during heat treatment.

[0036] (2) Easy to operate. The operator can adjust the height of the corresponding support positioning system and the pressure of the positioning fixture according to the shape of the skin. The skin can be fixed by setting the parameters corresponding to the skin. The skin can be corrected and shaped at one time to ensure the appearance of the skin and good surface quality consistency.

[0037] (3) The deformation control method used in the present invention reduces the time workers spend on repeatedly trimming the skin shape, shortening the product delivery cycle.

[0038] (4) The device of the present invention has a simple structure and can be applied to a variety of structural skin parts. The method is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the three-dimensional structure of the device without clamping the skin;

[0040] Figure 2 This is a schematic diagram of the three-dimensional structure of the device holding the skin;

[0041] Figure 3 It is a schematic diagram of the enlarged structure of the universal support frame of the present invention;

[0042] Figure 4 This is a schematic front view of the device of the present invention without clamping the skin;

[0043] Figure 5 It is a schematic side view of the device of the present invention without clamping the skin;

[0044] Among them, 1 is a concave tooling support plate, 2 is a drawer-type first slide, 3 is a drawer-type second slide, 4 is a convex tooling support plate, 5 is a universal support frame, 6 is a quick-insert skin clamping fixture, 7 is a quick-insert limit plate, 8 is a fine-tuning screw, 9 is a skin, and in the figure: 501 is a universal joint fork (5011, 5012), 502 is a T-shaft (5021, 5022), 503 is a hand-tightening screw nut (5031, 5032), 504 is a telescopic rod sleeve, and 505 is a telescopic rod. DETAILED DESCRIPTION

[0045] The following is a combination of the embodiments of the present invention Figure 1 , a clear and complete description of the technical solutions in the embodiments of the present invention is given. Obviously, the embodiments described are only a 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 those skilled in the art without creative work (such as using the device to shape and correct aluminum alloy sheets, and using the device to shape and correct other types of curved surface skins) are within the scope of protection of the present invention. In order to make the technical means, innovative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained in conjunction with specific embodiments below.

[0046] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0047] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0048] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when in use, or are the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0049] The present invention provides a technical solution: a large-scale thin-walled curved surface skin heat treatment deformation control device, see Figures 1 to 5, including a concave tooling support plate 1, a drawer-type first slide 2, a drawer-type second slide 3, a convex tooling support plate 4, a universal support frame 5, a quick-insert skin clamping fixture 6, a quick-insert limit plate 7, and a fine-tuning screw 8.

[0050] Among them, the concave tooling support plate 1 and the convex tooling support plate 4 are integrally cast and then split into pieces. The drawer-type first slide 2 is fixed to the bottom 1 of the concave tooling support plate. The drawer-type first slide 2 is in contact and sliding connection with the drawer-type second slide 3. The drawer-type second slide 3 is fixed to the bottom 4 of the convex tooling support plate. The concave tooling support plate 1 and the convex tooling support plate 4 can be opened and closed through two slides.

[0051] In this embodiment, a universal support frame 5 is provided on the upper surface of the concave tooling support plate 1 and the convex tooling support plate 4. The universal joint fork 5011 of the universal joint support frame 5 is connected to the support plate. The T-shaft 5021 is inserted into the slot hole of the universal joint fork 5011 and fixed on both sides by hand-tightening screws and nuts 5031.

[0052] The telescopic rod sleeve 504 is installed on the top of the T-axis 5021, and the telescopic rod 505 is placed inside the telescopic rod sleeve 504. The telescopic rod 505 and the telescopic rod sleeve 504 can be adjusted to achieve linear motion.

[0053] The T-shaft 5022 is placed at the top of the telescopic rod 505, the T-shaft 5022 is inserted into the slot of the universal joint fork 5012, and is fixed on both sides by hand screw nuts 5032. The hand screw nuts 5031 and the hand screw nuts 5032 are at a 90° angle to form a universal support frame 5 structure.

[0054] The quick-insertion limiting plate 7 is installed at the top of the central universal support frame 5. The surface of the quick-insertion limiting plate 7 is fitted with the skin 9.

[0055] Multiple sets of universal support frames 5 are mounted on the edges of the tooling support plate. Quick-insert skin clamping fixtures 6 are mounted on these universal support frames 5. These quick-insert skin clamping fixtures 6 are used to clamp and secure the skin 9. The quick-insert skin clamping fixtures 6 and quick-insert stoppers 7 secure and secure the skin 9, allowing the shaping process to be combined with the deformation control heat treatment process.

[0056] The T-shaft 502 and the universal joint fork 501 are fixed together by hand-tightened screws and nuts 503 to prevent unnecessary displacement during operation and to adjust the angle and distance between the quick-insert skin clamping fixture 6 and the tooling support plate. The quick-insert skin clamping fixture 6 uses a digital torque meter to adjust the downward pressure exerted by the fine-tuning screw 8 on the skin 9.

[0057] The concave and convex tooling support plates 1 and 4 have the same thickness, maintaining a horizontal bottom surface during movement to ensure the balance of the equipment. The number of universal support brackets 5 on the concave and convex tooling support plates 1 and 4 can be increased or decreased based on the shape and size of the skin 9. The spacing between the universal support brackets 5 is controlled within a range of 500mm to provide sufficient support for the aircraft's curved skin and control heat treatment deformation. The quick-insert stop plate 7 is a replaceable structure that fully conforms to aircraft curved skins of different sizes and shapes. The quick-insert stop plate 7 has an arc of 165° and a radius of 300mm.

[0058] Specific steps:

[0059] Step 1: Separate the concave tooling support plate 1 and the convex tooling support plate 4 through a slide, and select a quick-insert limit plate 7 with the same curvature as the curved surface to be heat-treated;

[0060] Step 2: Place the aluminum alloy skin 9 with a length of 1500mm, a width of 1000mm, and a thickness of 1.5mm on the quick-insert limit plate 7 to fit it completely. Adjust the height and angle of the universal support frame 5. After combining the concave tooling support plate 1 and the convex tooling support plate 4, place the edges and corners of the skin 9 in the skin clamping fixture 6.

[0061] Step 3: Use the digital torque meter to adjust the fine-tuning screw 8 so that it generates a downward force of 1-500N on the skin 9.

[0062] Step 4: Place the entire device in a heat treatment furnace and keep it at 450°C for 20 minutes. After the insulation is completed, put the entire device into 30°C water for rapid cooling.

[0063] Step 5: After cooling, natural aging or artificial aging is carried out according to the requirements of the skin. The natural aging is 2 days, the artificial aging temperature is 100℃, and the holding time is 5 hours.

[0064] The above content shows the basic principles, main features and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, but can be implemented in other specific forms without violating its spirit or basic characteristics. Therefore, from any perspective, the embodiments should be regarded as exemplary and non-restrictive. The scope of protection of the present invention is defined by the appended claims rather than the above description, and its purpose is to incorporate into the present invention all changes that fall within the meaning and scope of the equivalent elements of the claims. Any figure mark in the claims should not be interpreted as a limitation on the claims involved.

Claims

1. A large-scale thin-walled curved surface skin heat treatment deformation control device, characterized in that: It comprises a concave tooling support plate (1), a drawer-type first slideway (2), a drawer-type second slideway (3), a convex tooling support plate (4), a universal support frame (5), a quick-insert skin clamping fixture (6), a quick-insert limit plate (7), and a fine-tuning screw (8).

2. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1 is characterized in that: The concave tooling support plate (1) and the convex tooling support plate (4) are integrally cast and then segmented; a drawer-type first slideway (2) is fixed to the bottom (1) of the concave tooling support plate; the drawer-type first slideway (2) is in contact and sliding connection with a drawer-type second slideway (3); the drawer-type second slideway (3) is fixed to the bottom (4) of the convex tooling support plate; and the concave tooling support plate (1) and the convex tooling support plate (4) can be opened and closed by means of the two slideways.

3. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1 is characterized in that: A plurality of universal support frames (5) are installed above the tooling support plate (1), comprising a universal joint fork (501), a T-shaft (502), a telescopic rod sleeve (504), a telescopic rod (505), and a hand-tightened screw nut (503); The universal support frame (5) is placed on the upper surface of the concave tooling support plate (1) and the convex tooling support plate (4); The universal joint fork (501) includes a universal joint fork (5011) and a universal joint fork (5012); The T-shaped shaft (502) includes a T-shaped shaft (5021) and a T-shaped shaft (5022); The hand screw nut (503) comprises a hand screw nut (5031) and a hand screw nut (5032); The universal joint fork (5011) of the universal support frame (5) is connected to the support plate, the T-shaped shaft (5021) is inserted into the slot hole of the universal joint fork (5011), and is fixed on both sides by hand-tightening screw nuts (5031); The telescopic rod sleeve (504) is installed on the top of the T-axis (5021), and the telescopic rod (505) is placed inside the telescopic rod sleeve (504). The telescopic rod (505) and the telescopic rod sleeve (504) can realize telescopic adjustment to achieve linear motion; The T-shaped shaft (5022) is placed on the top of the telescopic rod (505), inserted into the slot of the universal joint fork (5012), and fixed on both sides by hand screw nuts (5032), and the hand screw nuts (5031) and the hand screw nuts (5032) are at a 90° angle to form a universal support frame (5) structure.

4. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1 is characterized in that: The quick-insert skin clamping fixture (6) is installed on the upper end of the universal support frame (5), and multiple sets of universal support frames (5) are installed at the edge of the tooling support plate. The multiple sets of quick-insert skin clamping fixtures (6) are used to clamp and fix the skin (9).

5. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1 is characterized in that: The quick-insertion limiting plate (7) is installed on the top of the universal support frame (5) at the center position; The surface of the quick-insertion limiting plate (7) is fitted with the skin (9); The concave tooling support plate (1) and the convex tooling support plate (4) have the same thickness, and their bottom surfaces remain horizontal during movement, thereby ensuring the balance of the equipment.

6. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 3 is characterized in that: The number of universal support frames (5) on the concave tooling support plate (1) and the convex tooling support plate (4) can be increased or decreased according to the shape and size of the skin (9), and the spacing of the universal support frames (5) is controlled within the range of 100-1500mm, so as to meet the requirements of supporting thin-walled curved skins of aircraft of multiple sizes and controlling deformation during heat treatment.

7. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 3 is characterized in that: The T-shaft (502) and the universal joint fork (501) are fixed by hand-tightening screw nuts (503) to prevent unnecessary displacement during operation, and to achieve adjustment of the angle and distance between the quick-insert skin clamping fixture (6) and the tooling support plate.

8. The large-scale thin-walled curved surface heat treatment deformation control device according to claim 1 is characterized in that: The skin (9) is fixed and clamped by a quick-insert skin clamping fixture (6) and a quick-insert limiting plate (7), thereby realizing the combined execution of the shaping process and the heat treatment process for controlling deformation.

9. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1, characterized in that: The quick-insert skin clamping fixture (6) applies downward pressure to the skin (9) by adjusting the fine-tuning screw (8) via a digital torque meter.

10. The large-scale thin-walled curved surface skin heat treatment deformation control device according to claim 1, characterized in that: The quick-insertion limiting plate (7) is a replaceable structure to completely fit with aircraft curved skins of different sizes and shapes. The curvature range of the quick-insertion limiting plate (7) is 180-45°, and the radius is 50-1000 mm.

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