Device and method for rolling hard-to-deform high-temperature alloy high-pressure compressor casing forged piece
By employing a busbar closed-ring rolling forging process and a constant-force output upper pressure roller design, the problems of poor billet stability and coarse grains in forgings of high-pressure compressor casings made from difficult-to-deform high-temperature alloys have been solved, achieving efficient and low-cost forging manufacturing and improving material utilization and process stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-01-28
- Publication Date
- 2026-04-03
AI Technical Summary
In traditional rolling methods, the billet forgings of high-pressure compressor casings made of difficult-to-deform high-temperature alloys have poor stability, coarse grains, high cost, and local filling defects. Existing technologies cannot meet their manufacturing requirements.
The process employs a busbar closed-ring rolling forging process, using upper pressure rollers and lower support rollers with constant force output. Combined with the design of drive rollers and core rollers, a simply supported beam state is formed through connecting rod hinges, achieving stable rolling of the ring billet and controlling the forging temperature and deformation amount to refine the grains.
It improves the quality and stability of forgings, reduces production costs, reduces coarse grain defects, improves material utilization and process stability, and simplifies the process flow.
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Figure CN121776381A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of special-shaped forging technology, specifically relating to a rolling device and method for forging high-pressure compressor casings made of difficult-to-deform high-temperature alloys. Background Technology
[0002] High-pressure compressor casings are critical components of equipment such as aero engines. They are often multi-step, large-diameter structures with complex internal and external surfaces and significant dimensional differences between the two ends of the forging. In traditional rolling processes, rolling mills typically employ an upward-pull mandrel design. This design, when producing heavy casing forgings, requires the large end of the forging to face upwards to ensure smooth insertion of the mandrel die into the billet's inner hole. However, rolling with the large end of the billet facing upwards is detrimental to stable rolling of the billet and also affects the uniformity of stress on the mandrel, easily leading to rolling failure.
[0003] Difficult-to-deform superalloys, such as nickel-based superalloys, possess advantages such as good thermal stability, high-temperature strength and hardness, corrosion resistance, and wear resistance, making them ideal materials for manufacturing high-pressure compressor casings. However, these materials have a narrow forging temperature range and strict process requirements for the number of forging passes. Too many forging passes can lead to uncontrollable grain size, resulting in a decrease in the performance of the forging. The current process for manufacturing casing ring forgings typically involves blanking, upsetting, punching, reaming with a frame, skewing, die-casting, pre-rolling, and rolling. This process has several drawbacks: firstly, it requires the use of a die, which is a curved structure made of high-temperature die material, resulting in high production costs and long cycles; secondly, the entire manufacturing process requires four forging passes, which can easily lead to coarse grains; and thirdly, it does not belong to the closed-loop forging process, where the contact between the roller generatrix and the forging gradually increases during forging, making it prone to localized filling defects. Furthermore, spinning technology cannot meet the manufacturing requirements of difficult-to-deform high-temperature alloy casings. Spinning technology completes the machining of the entire curved surface through point contact, and its process cycle cannot adapt to the narrow forgeable temperature range required by difficult-to-deform high-temperature alloys. Therefore, it is urgent to develop a new rolling device and method to solve the above-mentioned technical problems. Summary of the Invention
[0004] To address the aforementioned problems, the present invention aims to provide a rolling apparatus and method for forging high-pressure compressor casings from difficult-to-deform high-temperature alloys, thereby solving the problems of poor billet stability, coarse grains, high cost, and localized filling defects in traditional rolling methods.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] This invention provides a rolling apparatus for forging high-pressure compressor casings made of difficult-to-deform high-temperature alloys, comprising a base, a workpiece clamping and driving mechanism, a mandrel, a drive roller, and a connecting rod. The workpiece clamping and driving mechanism includes multiple columns arranged circumferentially on the base, each column being capable of radial movement. Each column has an upper pressure roller and a lower support roller along its height direction on its sidewall. Both the upper pressure roller and the lower support roller have degrees of freedom for lifting, lowering, and rotating around their own axes. The lower support roller is used to support the ring blank, and the upper pressure roller is used to output constant pressure above the ring blank. The mandrel and drive roller are rotatably mounted on the base and clamp the inner and outer sides of the ring blank, respectively. The tops of the mandrel and drive roller are hinged by a connecting rod. The drive roller drives the ring blank to rotate, while the mandrel rotates passively. The ring blank is forged and rolled to obtain a forging. The rotation generatrices of the mandrel and drive roller are matched from top to bottom with the generatrices of the ring blank and the forging, respectively.
[0007] The base is provided with a driving structure, which is used to drive the column to move radially along the ring blank.
[0008] The axial direction of the upper pressure roller and the lower support roller is consistent with the radial direction of the ring blank, and the cantilever length of the two rollers can cover the ring blank and the forging.
[0009] The number of columns is three, and each column is equipped with a hydraulic servo system, which can independently drive the upper pressure roller and the lower support roller to move up and down.
[0010] The upper pressure roller is equipped with a constant force mechanism capable of outputting constant pressure.
[0011] The forging is a thin-walled annular flared shape with upper and lower flanges at both ends, and an irregular stop structure in the middle of the inner wall. The irregular stop structure includes a raised rounded corner and a concave rounded corner of the middle stop.
[0012] The forging is made of a nickel-based high-temperature alloy.
[0013] Another aspect of the present invention provides a method for rolling a difficult-to-deform high-temperature alloy high-pressure compressor casing forging using the apparatus described above, comprising the following steps:
[0014] Step S1: Select metal rod-shaped raw materials for cutting, and then perform upsetting treatment on the billet to make the length and thickness of the billet meet the process requirements;
[0015] Step S2: Punch holes in the upset billet to open up the center of the billet;
[0016] Step S3: Expand the hole in the punched billet using a frame, adjust the hole diameter to the preset size, and obtain a ring billet with a rectangular cross section;
[0017] Step S4: Use a lifting device to insert the ring blank between the core roller and the drive roller;
[0018] Step S5: Control the column to move a distance from a position far from the ring blank to the center of the ring blank, so that the three lower support rollers support the ring blank, and then install the connecting rod on top of the core roller and the drive roller;
[0019] Step S6: Control the upper pressure roller to move downwards. After the upper pressure roller contacts the upper side of the ring blank, it continuously outputs the constant process pressure downwards.
[0020] Step S7: Start the drive roller to drive the ring billet to rotate and begin forging and rolling;
[0021] Step S8: Control the lower idler roller to descend servo-driven, and the upper pressure roller to continuously output constant process force and follow up, rolling the ring billet into a forging;
[0022] Step S9: Stop driving the drive rollers and end the forging and rolling process; at this time, the upper pressure roller is in contact with the upper side of the upper flange of the forging, and the lower support roller is in contact with the lower side of the lower flange of the forging.
[0023] Step S10: Disassemble the connecting rod and drive roller, and unload the forging using a crane.
[0024] In steps S1-S3, the temperature of the billet needs to be controlled at 1060-1100℃ and the deformation amount needs to be above 30% to facilitate crystal refinement and break up the coarse dendrites of the ingot.
[0025] In step S7, the shear stress friction coefficient between the drive roller and the core roller is controlled to be between 0.5 and 0.7;
[0026] In step S8, a forging temperature range of 1030℃ to 1060℃ is used to prevent grain growth, while continuous deformation improves grain morphology and refines grains; the axial feed rate of the lower idler roller servo descent is increased from 5mm / s to 7mm / s, and the ring rolling forging deformation of the ring billet into the forging is 27.3-39.7%.
[0027] The present invention has the following beneficial effects and advantages:
[0028] 1. Improved forging quality: This invention employs a closed-ring forging process with continuous constant pressure from the upper pressure roller, resulting in better fillet coverage of the forging and effectively solving the problem of localized filling defects. Simultaneously, by controlling the forging temperature and deformation, low-temperature forging is achieved, refining the grain size, preventing coarse grains, and improving the mechanical properties of the forging.
[0029] 2. Reduced production costs: This invention eliminates the need for a mandrel, saving on mandrel manufacturing costs and time. The mandrel does not require radial feed servo motion, simplifying the equipment structure and reducing equipment costs. Furthermore, this invention simplifies the traditional four-pass firing process to a single pass, shortening the process cycle and reducing energy consumption and material waste.
[0030] 3. Improved process stability: Process components can counteract the radial force during ring rolling, changing the support state of the mandrel and drive roll from a cantilever state to a simply supported beam state, thus enhancing equipment stability. The billet rolling method is more rational, improving billet rolling stability and reducing the rolling failure rate.
[0031] 4. Improved material utilization: The present invention adopts near-net-shape forming technology, which makes the forgings fit the final part surface better, reduces the subsequent machining allowance, improves material utilization, and shortens the processing cycle.
[0032] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures particularly pointed out in the written description and the accompanying drawings.
[0033] The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description
[0034] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:
[0035] Figure 1 This is an isometric view of the starting rolling process of a rolling device for forging a difficult-to-deform high-temperature alloy high-pressure compressor casing according to the present invention.
[0036] Figure 2 This is a cross-sectional view of the starting rolling process of a rolling device for forging a difficult-to-deform high-temperature alloy high-pressure compressor casing according to the present invention.
[0037] Figure 3 This is an isometric view of the finished rolling process of a rolling device for forging a difficult-to-deform high-temperature alloy high-pressure compressor casing according to the present invention.
[0038] Figure 4 This is a cross-sectional view of the finished rolling process of a rolling device for forging a difficult-to-deform high-temperature alloy high-pressure compressor casing according to the present invention.
[0039] Figure 5 for Figure 4 A magnified view of a portion of point A in the middle.
[0040] In the figure: 1. Ring blank; 2. Base; 3. Column; 4. Upper pressure roller; 5. Lower support roller; 6. Core roller; 7. Drive roller; 8. Forging; 801. Upper flange; 802. Middle stop protruding fillet; 803. Middle stop concave fillet; 804. Lower flange; 9. Connecting rod. Detailed Implementation
[0041] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.
[0042] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.
[0043] See Figures 1 to 5 As shown, an embodiment of the present invention provides a rolling device for forging high-pressure compressor casings of difficult-to-deform high-temperature alloys, including a base 2, a workpiece clamping drive mechanism, a core roller 6, a drive roller 7, and a connecting rod 9. The workpiece clamping drive mechanism includes multiple columns 3 arranged circumferentially on the base 2, and each column 3 is capable of radial movement. Each column 3 has an upper pressure roller 4 and a lower support roller 5 arranged along its height direction on its side wall. Both the upper pressure roller 4 and the lower support roller 5 have the freedom to lift, move, and rotate around their own axes. The lower support roller 5 is used to support the ring blank 1, and the upper pressure roller 4 is used to output constant pressure above the ring blank 1. The core roller 6 and the drive roller 7 are rotatably mounted on the base 2 and clamp the inner and outer sides of the ring blank 1, respectively. The tops of the core roller 6 and the drive roller 7 are hinged through the connecting rod 9. The drive roller 7 is used to drive the ring blank 1 to rotate, and the core roller 6 rotates passively. The ring blank 1 is forged and rolled to obtain a forging 8. The rotation generatrices of the core roller 6 and the drive roller 7 are matched from top to bottom with the generatrices of the ring blank 1 and the forging 8, respectively. The connecting rod 9 can counteract the radial force during the ring rolling process of the forging, so that the support state of the core roll 6 and the drive roll 7 changes from the cantilever state to the simply supported beam state.
[0044] Furthermore, the base 2 is equipped with a drive structure for driving the column 3 to move linearly along the radial direction of the ring blank 1. Specifically, the linear drive is preferably a servo hydraulic cylinder; the rotary drive is preferably a servo hydraulic motor; and the rotary pair is preferably a sliding bearing.
[0045] Furthermore, the axial direction of the upper pressure roller 4 and the lower support roller 5 is consistent with the radial direction of the ring blank 1, and the cantilever length of the two can cover the ring blank 1 and the forging 8.
[0046] See Figure 1 As shown in the embodiment of the present invention, there are three columns 3. Each column 3 is equipped with a hydraulic servo system, which can independently drive the upper pressure roller 4 and the lower support roller 5 to move up and down. The upper pressure roller 4 is equipped with a constant force servo hydraulic actuator capable of outputting constant pressure. Specifically, the constant force servo hydraulic actuator is preferably a hydraulic cylinder.
[0047] See Figure 5 As shown in the embodiment of the present invention, the forging 8 is a thin-walled annular flared shape with an upper flange 801 and a lower flange 804 at both ends, and an irregular stop structure is provided in the middle of the inner wall. The irregular stop structure includes a raised fillet 802 and a recessed fillet 803 of the middle stop, which are provided at the top and bottom. The forging 8 is made of a nickel-based high-temperature alloy, preferably GH4065A, which has the characteristics of good thermal stability, high-temperature strength and hardness, corrosion resistance, and wear resistance. It is a typical difficult-to-machine material and is often used to manufacture key engine components such as turbine disks.
[0048] See Figure 2 , Figure 4 As shown in the embodiment of the invention, the contour shapes of the mandrel 6 and the drive roller 7 are the core design for achieving closed-loop rolling. Both contour shapes perfectly match the generatrices of the ring billet 1 and the forging 8. Specifically, the rotation generatrices of the mandrel 6 correspond one-to-one with the inner wall contour of the ring billet 1 and the final inner wall contour of the forging 8 from top to bottom; the rotation generatrices of the drive roller 7 correspond one-to-one with the outer wall contour of the ring billet 1 and the final outer wall contour of the forging 8 from top to bottom. This design ensures that the roller surface remains in contact with the contact surfaces of the ring billet 1 and the forging 8 during rolling, forming a closed rolling space and avoiding localized filling defects.
[0049] Forging 8 is a thin-walled annular flared structure, comprising an upper flange 801, a central stop protruding fillet 802, a central stop concave fillet 803, and a lower flange 804. The contours of the mandrel 6 and drive roller 7 correspond to these structures, with matching stepped, rounded transition surfaces precisely matching the central stop protruding fillet 802 and central stop concave fillet 803 of the forging. During rolling, the contours of the mandrel 6 and drive roller 7 guide the ring blank 1 to gradually deform, completely filling each cavity of the forging. Combined with the constant pressure applied by the pressure roller 4, this ultimately ensures the full fillet coverage and overall surface accuracy of forging 8.
[0050] An embodiment of the present invention provides a rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings, the working principle of which can be divided into three stages:
[0051] I. Clamping and Positioning Stage:
[0052] The base 2 drives the three columns 3 to move radially towards the ring blank 1, causing the lower support roller 5 to lift the ring blank 1 and complete the initial positioning. A connecting rod 9 is installed on the upper end of the core roller 6 and the drive roller 7, forming a hinge pair. This operation can counteract the radial force of the ring rolling mill, changing the cantilever support state of the core roller 6 and the drive roller 7 to a simply supported beam state, thus improving the operational stability of the equipment.
[0053] II. Constant Force Rolling Stage:
[0054] The hydraulic servo system inside column 3 drives the upper pressure roller 4 downwards, and after contacting the ring billet 1, it outputs stable pressure through a constant force mechanism. The drive roller 7 provides the rolling power, driving the ring billet 1 to rotate. The core roller 6, upper pressure roller 4, and lower support roller 5 rotate with the ring billet 1, and the three of them are in contact with the generatrix of the rotating drive roller 7, forming a closed ring rolling. During this process, the lower support roller descends servo-driven with an axial feed of 5-7 mm / s, and the upper pressure roller 4 maintains a constant force and moves accordingly. The ring billet 1 undergoes a deformation of 27.3-39.7% at a low temperature of 1030-1060℃, and is gradually rolled into a thin-walled annular trumpet-shaped forging.
[0055] III. Unloading Stage:
[0056] After rolling is completed, the drive roller 7 stops operating, and the upper pressure roller 4 remains in contact with the upper flange of the forging, while the lower support roller 5 remains in contact with the lower flange of the forging to ensure the stability of the forging profile. Then, the connecting rod 9 and the drive roller 7 are disassembled, and the forging is unloaded by a crane.
[0057] This invention provides a rolling apparatus for forging difficult-to-deform high-temperature alloy high-pressure compressor casings. It employs a closed-ring forging process with a continuous, constant pressure output from the upper pressure roller, which improves the fillet coverage of the forging and effectively solves the problem of localized filling defects. Simultaneously, by controlling the forging temperature and deformation, low-temperature forging is achieved, refining the grain size, avoiding coarse grains, and improving the mechanical properties of the forging. This invention utilizes near-net-shape forming technology, resulting in forgings that better conform to the final part profile, reducing subsequent machining allowances, improving material utilization, and shortening the processing cycle.
[0058] See Figures 1 to 5 As shown, another embodiment of the present invention provides a method for rolling a difficult-to-deform high-temperature alloy high-pressure compressor casing forging using the device described above, comprising the following steps:
[0059] Step S1: Select metal rod-shaped raw materials for cutting, and then perform upsetting treatment on the billet to make the length and thickness of the billet meet the process requirements;
[0060] Step S2: Punch holes in the upset billet to open up the center of the billet;
[0061] Step S3: Expand the hole in the punched billet using a frame, adjust the hole diameter to the preset size, and the billet volume is reasonably distributed to obtain a ring billet 1 with a rectangular cross section;
[0062] Step S4: Use a lifting device to insert the ring blank 1 between the core roller 6 and the drive roller 7;
[0063] Step S5: Control column 3 to move a distance from a position far away from the ring blank 1 towards the center of the ring blank 1, so that the three lower support rollers 5 support the ring blank 1. Then, connect rod 9 is installed on the top of core roller 6 and drive roller 7. Connecting rod 9 can counteract the radial force during the ring rolling process of the forging, so that the support state of core roller 6 and drive roller 7 changes from cantilever state to simply supported beam state, which enhances the stability of the equipment.
[0064] Step S6: Control the upper pressure roller 4 to move downward. When the upper pressure roller 4 contacts the upper side of the ring blank 1, it continuously outputs the constant process pressure downward.
[0065] Step S7: Start the drive roller 7 to drive the ring billet 1 to rotate and begin forging and rolling; control the shear stress friction coefficient between the drive roller 7 and the core roller 6 to be between 0.5 and 0.7;
[0066] Step S8: Control the lower support roller 5 to descend servo-driven, and the upper pressure roller 4 to continuously output constant process pressure and follow up, rolling the ring billet 1 into a forging 8;
[0067] Step S9: Stop driving the drive roller 7 and end the forging and rolling process; at this time, the upper pressure roller 4 is in contact with the upper side of the upper flange 801 of the forging 8, and the lower support roller 5 is in contact with the lower flange 804 of the forging 8.
[0068] Step S10: Disassemble the connecting rod 9 and drive roller 7, and unload the forging 8 using a crane.
[0069] In steps S1-S3, the temperature of the billet needs to be controlled at 1060-1100℃ and the deformation amount needs to be above 30% to facilitate crystal refinement and break up the coarse dendrites of the ingot.
[0070] In step S8, a forging temperature range of 1030℃ to 1060℃ is used to prevent grain growth, while continuous deformation improves grain morphology and refines grains; the axial feed of the lower support roller 5 servo descending is increased from 5mm / s to 7mm / s, and the ring rolling forging deformation of the ring billet 1 into the forging 8 is 27.3-39.7%.
[0071] Testing revealed that the forgings prepared using the method described in this embodiment have fine and uniform grains, good filling of the raised and concave fillets at the intermediate stop, no local filling defects, and significantly improved material utilization compared to traditional processes, thus shortening the process cycle.
[0072] This invention employs a busbar closed-ring rolling forging process, simplifying the traditional multi-pass manufacturing process to a single pass. This effectively solves problems such as poor billet stability, coarse grains, high cost, and localized filling defects inherent in traditional rolling methods. By precisely controlling temperature and deformation, this method refines the forging grains, improves the fillet coverage of the forgings, increases material utilization, and shortens the processing cycle. It is suitable for rolling high-pressure compressor casing forgings made from difficult-to-deform materials such as nickel-based high-temperature alloys.
[0073] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.
Claims
1. A rolling apparatus for forging high-pressure compressor casings made of difficult-to-deform high-temperature alloys, characterized in that, The system includes a base (2), a workpiece clamping drive mechanism, a core roller (6), a drive roller (7), and a connecting rod (9). The workpiece clamping drive mechanism includes multiple columns (3) arranged circumferentially on the base (2), and each column (3) can move radially. Each column (3) has an upper pressure roller (4) and a lower support roller (5) arranged along its height on its side wall. Both the upper pressure roller (4) and the lower support roller (5) have the freedom to lift and rotate around their own axis. The lower support roller (5) is used to support the ring blank (1), and the upper pressure roller (4) is used to support the ring blank (1). A constant pressure is output above the ring blank (1); the core roller (6) and the drive roller (7) are rotatably mounted on the base (2) and clamped on the inner and outer sides of the ring blank (1) respectively. The tops of the core roller (6) and the drive roller (7) are hinged by the connecting rod (9). The drive roller (7) is used to drive the ring blank (1) to rotate, and the core roller (6) rotates passively; the ring blank (1) is forged and rolled to obtain the forging (8); the rotation generatrices of the core roller (6) and the drive roller (7) are matched with the generatrices of the ring blank (1) and the forging (8) respectively from top to bottom.
2. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The base (2) is provided with a driving structure, which is used to drive the column (3) to move radially along the ring blank (1).
3. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The axial direction of the upper pressure roller (4) and the lower support roller (5) is consistent with the radial direction of the ring blank (1), and the cantilever length of the two can cover the ring blank (1) and the forging (8).
4. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The number of columns (3) is three. Each column (3) is equipped with a hydraulic servo system. The hydraulic servo system can independently drive the upper pressure roller (4) and the lower support roller (5) to move up and down.
5. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The upper pressure roller (4) is equipped with a constant force mechanism that can output constant pressure.
6. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The forging (8) is a thin-walled annular flared shape with an upper flange (801) and a lower flange (804) at both ends, and has an irregular stop structure in the middle of the inner wall. The irregular stop structure includes a middle stop protruding rounded corner (802) and a middle stop concave rounded corner (803) provided at the top and bottom.
7. The rolling apparatus for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 1, characterized in that, The forging (8) is made of a nickel-based high-temperature alloy.
8. A method for rolling a difficult-to-deform high-temperature alloy high-pressure compressor casing forging using the device described in any one of claims 1-7, characterized in that, Includes the following steps: Step S1: Select a metal rod-shaped billet for cutting, and then perform upsetting treatment on the billet to make the length and thickness of the billet meet the process requirements; Step S2: Punch holes in the upset billet to open up the center of the billet; Step S3: Expand the hole in the punched billet using a frame, adjust the hole diameter to the preset size, and obtain a ring billet with a rectangular cross section (1). Step S4: Use a lifting device to insert the ring blank (1) between the core roller (6) and the drive roller (7); Step S5: Control column (3) to move a distance from a position far away from ring blank (1) to the center of ring blank (1) so that the three lower rollers (5) support the ring blank (1), and then install connecting rod (9) on top of core roller (6) and drive roller (7). Step S6: Control the upper pressure roller (4) to move downward. When the upper pressure roller (4) contacts the upper side of the ring blank (1), it continues to output the constant process pressure downward. Step S7: Start the drive roller (7) to drive the ring billet (1) to rotate and begin forging and rolling; Step S8: Control the lower roller (5) to descend servo, and the upper pressure roller (4) continuously outputs constant process pressure and moves accordingly to roll the ring billet (1) into a forging (8). Step S9: Stop driving the drive roller (7) and end the forging and rolling process; at this time, the upper pressure roller (4) contacts the upper side of the upper flange (801) of the forging (8), and the lower support roller (5) contacts the lower side of the lower flange (804) of the forging (8); Step S10: Disassemble the connecting rod (9) and drive roller (7), and unload the forging (8) using a crane.
9. The rolling method for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 8, characterized in that, In steps S1-S3, the temperature of the billet needs to be controlled at 1060-1100℃ and the deformation amount needs to be above 30% to facilitate crystal refinement and break up the coarse dendrites of the ingot.
10. The rolling method for forging and rolling difficult-to-deform high-temperature alloy high-pressure compressor casings according to claim 8, characterized in that, In step S7, the shear stress friction coefficient between the drive roller (7) and the core roller (6) is controlled to be between 0.5 and 0.7; In step S8, a forging temperature range of 1030℃ to 1060℃ is used to prevent grain growth, while continuous deformation is used to improve grain morphology and refine grains; the axial feed of the lower support roller (5) is increased from 5mm / s to 7mm / s, and the ring rolling forging deformation of the ring billet (1) into the forging (8) is 27.3-39.7%.