A tool for cold pressing of aluminum alloy ring-shaped forgings

Abstract

This utility model discloses a tooling for cold pressing aluminum alloy ring forgings. It is characterized by comprising an inner L-shaped tooling and an outer L-shaped tooling. The inner L-shaped tooling includes a mutually fixed annular pressure plate and an inner cylinder, with the cross-section of the inner L-shaped tooling being an inverted L-shape. The outer L-shaped tooling includes a mutually fixed annular pad and an outer cylinder, with the cross-section of the outer L-shaped tooling being an inward-facing L-shape. A gasket ring is placed on the annular pad, and the ring forging is placed on the gasket ring. The outer wall of the ring forging is tightly against the inner wall of the outer cylinder. The annular pressure plate is placed on the ring forging, and the inner cylinder extends into the ring forging, with its outer wall tightly against the inner wall of the ring forging. An annular gasket is placed on the outer cylinder. This invention features a self-designed double L-shaped tooling, placing the aluminum alloy forging ring within the double L-shaped tooling for overall cold compression. The compression amount is controlled by the height of the L-shaped tooling and the annular gasket.

Description

Technical Field

[0001] This utility model relates to the field of forging processing, and in particular to a tooling for cold pressing of aluminum alloy ring forgings. Background Technology

[0002] When strengthening aluminum alloy ring forgings for aerospace applications, cold compression treatment is often performed on the forgings. To ensure the effect of cold compression deformation, cold compression deformation strengthening should be carried out within two hours after the solution heat treatment is completed. The cold compression deformation rate is generally controlled at 2% to 4% of the height, and the difference in cold compression deformation rate of a single product is less than 1%.

[0003] When compression deformation is performed directly on a press in a free state or using simple tooling, problems such as uncontrollable deformation, uneven deformation, end face shrinkage, bulging in the middle, and warping in the height direction will occur. These problems directly affect product performance and subsequent processing and forming. Utility Model Content

[0004] To ensure controllable compression ratio and uniformity, this utility model provides a tooling for cold pressing aluminum alloy ring forgings. A double L-shaped tooling is designed to place the aluminum alloy forging ring inside the double L-shaped tooling for overall cold compression. The amount of compression is controlled by the height of the L-shaped tooling and the ring gasket.

[0005] This utility model is achieved through the following technical solution: A tooling for cold pressing aluminum alloy ring forgings is characterized by comprising an inner L-shaped tooling and an outer L-shaped tooling. The inner L-shaped tooling includes an annular pressure plate and an inner cylinder fixed to each other, and the cross-section of the inner L-shaped tooling is an inverted L-shape. The outer L-shaped tooling includes an annular pad and an outer cylinder fixed to each other, and the cross-section of the outer L-shaped tooling is an inward L-shape. A gasket is placed on the annular pad, and the ring forging is placed on the gasket. The outer wall of the ring forging is in close contact with the inner wall of the outer cylinder. The annular pressure plate is placed on the ring forging, and the inner cylinder extends into the ring forging. The outer wall of the inner cylinder is in close contact with the inner wall of the ring forging. An annular gasket is placed on the outer cylinder.

[0006] Further optimized, the outer diameter of the annular pressure plate is larger than the outer diameter of the annular forging, and the annular gasket is located below the annular pressure plate.

[0007] In a further optimized manner, the annular gasket has several layers, a limiting groove is formed at the bottom of the annular gasket, and a fixed limiting ring is formed at the top of the annular gasket. The height of the annular gasket can be adjusted by stacking the annular gaskets.

[0008] Further optimized, the upper end of the outer cylinder is fixed with a second limiting ring that matches the limiting groove.

[0009] Further optimized, the washer ring includes a plurality of coaxial washer rings, which are placed tightly against each other from the outside to the inside.

[0010] Further optimized, the height of the washer ring is greater than the distance between the washer and the pressure plate.

[0011] The beneficial effects of this utility model are: This tooling is easy and quick to assemble and disassemble, and the compression of the ring forging can be accurately controlled by the height of the annular shim.

[0012] In this new type of double L-shaped tooling, the inner and outer walls of the annular forging are closely attached, which limits the shrinkage of the two ends of the forging and the bulging in the middle during cold pressing, ensuring a high compression ratio. At the same time, it solves the problem that the inner and outer diameters do not meet the machining allowance requirements due to deformation.

[0013] This tooling can be used for cold pressing deformation of aluminum alloy ring forgings of different heights and wall thicknesses, and has a certain degree of versatility. Attached Figure Description

[0014] Figure 1 This is a cross-sectional three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a cross-sectional schematic diagram of the present invention.

[0016] In the figure: 1. Inner L-shaped tooling; 11. Inner cylinder; 12. Pressure plate; 2. Outer L-shaped tooling; 21. Outer cylinder; 211. Second limiting ring; 22. Pad plate; 3. Ring forging; 4. Ring gasket; 41. Limiting ring; 5. Washer ring. Detailed Implementation

[0017] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. In the description of this invention, it should be noted that the terms "left," "right," "front," "rear," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0018] like Figures 1-2 As shown, this utility model provides a tooling for cold pressing of aluminum alloy ring forgings, including an inner L-shaped tooling 1 and an outer L-shaped tooling 2, with the ring forging 3 placed between the two. The ring forging is cold-compressed and deformed by pressing the tooling with a hydraulic press to strengthen the forging.

[0019] The inner L-shaped fixture 1 includes an annular pressure plate 12 and an inner cylinder 11 fixed to each other, and the cross-section of the inner L-shaped fixture 1 is an inverted L-shape. The outer L-shaped fixture 2 includes an annular pad 22 and an outer cylinder 21 fixed to each other, and the cross-section of the outer L-shaped fixture 2 is an inward L-shape. A gasket 5 is placed on the annular pad 22, and an annular forging 3 is placed on the gasket 5. The outer wall of the annular forging is in close contact with the inner wall of the outer cylinder 21. The annular pressure plate 12 is placed on the annular forging 3, and the inner cylinder 11 extends into the annular forging. The outer wall of the inner cylinder 11 is in close contact with the inner wall of the annular forging. An annular gasket 4 is placed on the outer cylinder 21. The outer and inner cylinders are tightly attached to the inner and outer walls of the annular forging, which limits the shrinkage of the two ends of the forging and the bulging in the middle during cold pressing, ensuring a high compression ratio. At the same time, it solves the problem that the inner and outer diameters do not meet the machining allowance requirements due to deformation. By placing annular shims of different heights, the compression of the annular forging can be controlled more accurately, avoiding over-compression.

[0020] In a preferred embodiment, the outer diameter of the annular pressure plate 12 is larger than the outer diameter of the annular forging 3, and the annular gasket 4 is located below the annular pressure plate 12. When the hydraulic press presses down the pressure plate, the annular gasket supports and limits the pressure plate, indicating that it has been compressed to the required position, thus more accurately controlling the compression amount of the annular forging.

[0021] In a preferred embodiment, the annular gasket 4 has several layers. A limiting groove is formed at the bottom of the annular gasket 4, and a limiting ring 41 is fixed at the top. The height of the annular gasket 4 is adjusted by stacking the annular gaskets 4. In actual operation, different numbers of annular gaskets are placed to correspond to different compression heights depending on the compression amount. Preferably, the topmost annular gasket does not have a limiting ring at the top to protect the service life of the pressure plate.

[0022] In a preferred embodiment, the upper end of the outer cylinder 21 is fixed with a second limiting ring 41 that is adapted to the limiting groove to prevent displacement of the annular gasket.

[0023] In a preferred embodiment, the washer ring 5 comprises a plurality of coaxial washer rings 5, which are placed tightly against each other from the outside in. The number of washer rings is determined according to the thickness of the annular forging, and the total thickness of the washer rings is the same as the thickness of the forging. This allows the tooling to compress forgings of different thicknesses. The washer rings also support the annular forging, preventing the tooling from being unusable when the height of the annular forging is less than the height of the outer cylinder. Using washer rings to support the annular forging also allows the lower end of the inner cylinder to extend beyond the forging, preventing the bottom of the forging from shrinking inward during compression. In a preferred embodiment, the height of the gasket 5 is greater than the distance between the gasket and the pressure plate 12, so that the inner cylinder of the inner L-shaped tooling has a downward displacement margin. Example

[0024] The following steps are included when using this tooling. (1) Select the corresponding double L-shaped tooling according to the size of the aluminum alloy forging ring, and select the appropriate number of annular shims and washers according to the height and thickness of the aluminum alloy forging ring. (2) Place the washer ring on the pad of the outer L-shaped tooling and stack the annular washer on the outer cylinder of the L-shaped tooling; (3) After the solution-treated aluminum alloy forging ring comes out of the water, it is placed on the pad ring inside the outer L-shaped tooling. The inner L-shaped tooling is placed on the aluminum alloy forging ring, that is, the inner cylinder is inserted into the inside of the forging ring, the pressure plate is pressed on the upper end of the forging ring, and then it is transferred together with the outer L-shaped tooling to the worktable of the hydraulic press with a capacity of more than 10,000 tons. (4) The hydraulic press performs overall compression deformation; (5) After deformation is complete, remove the inner L-shaped tooling and the annular gasket; (6) After the aluminum alloy forging ring cools to room temperature, remove the aluminum alloy forging ring from the L-shaped tooling to complete the cold compression deformation.

[0025] All aspects not detailed in this utility model are well-known to those skilled in the art. Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and not to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A tooling for cold pressing of aluminum alloy annular forgings, characterized by: The fixture includes an inner L-shaped tooling and an outer L-shaped tooling. The inner L-shaped tooling includes an annular pressure plate and an inner cylinder that are fixed to each other. The cross-section of the inner L-shaped tooling is an inverted L-shape. The outer L-shaped tooling includes an annular pad and an outer cylinder that are fixed to each other. The cross-section of the outer L-shaped tooling is an inward L-shape. A gasket is placed on the annular pad. An annular forging is placed on the gasket. The outer wall of the annular forging is in close contact with the inner wall of the outer cylinder. The annular pressure plate is placed on the annular forging. The inner cylinder extends into the annular forging. The outer wall of the inner cylinder is in close contact with the inner wall of the annular forging. An annular gasket is placed on the outer cylinder.

2. The tooling for cold pressing of aluminum alloy annular forgings of claim 1, wherein: The outer diameter of the annular pressure plate is larger than the outer diameter of the annular forging, and the annular gasket is located below the annular pressure plate.

3. The tooling for cold pressing of aluminum alloy annular forgings of claim 2, wherein: The annular gasket has several layers. A limiting groove is opened at the bottom of the annular gasket, and a limiting ring is fixed at the top of the annular gasket. The height of the annular gasket can be adjusted by stacking the annular gaskets.

4. The tooling for cold pressing of aluminum alloy annular forgings of claim 3, wherein: The upper end of the outer cylinder is fixed with a second limiting ring that is adapted to the limiting groove.

5. The tooling for cold pressing of aluminum alloy annular forgings of claim 1, wherein: The washer ring includes several coaxial washer rings, which are placed tightly against each other from the outside to the inside.

6. The tooling for cold pressing of aluminum alloy annular forgings of claim 1, wherein: The height of the washer ring is greater than the distance between the washer and the pressure plate.

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