Forming die forging forming method for large GH4169 alloy thick-wall disc ring forged piece
Through the method of forming and decomposing the final forming punch three times in a row, the tonnage and processing allowance of large GH4169 alloy thick-walled disc ring forging equipment is solved, and efficient use of small equipment and reduced production costs are achieved.
Patent Information
- Application Number
- CN202311828260.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-28
- Publication Date
- 2025-07-01
AI Technical Summary
The prior art is difficult to effectively reduce the equipment tonnage and processing allowance for the formation of large GH4169 alloy thick-walled disc ring forgings, resulting in higher production costs.
The three-sequent tire mold forming method is adopted, and two-sequent tire mold preformation are first prepared. By decomposing the final forming punch, small equipment can do big work, and the forging method is used to reduce the processing allowance of forging parts.
It effectively reduces the equipment tonnage demand, realizes the efficient use of small equipment, reduces the processing allowance and production costs of forgings, and makes the shape of forgings closer to the shape of parts.
Smart Images
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Abstract
Description
Technical Field
[0001] The present invention relates to a die forging forming method of disk-ring forgings, and particularly to a die forging forming method of large-sized GH4169 alloy thick-walled disk-ring forgings. Background Art
[0002] The GH4169 alloy is a nickel-based superalloy strengthened by precipitation of body-centered tetragonal γ / / and face-centered cubic γ / phases. It has good comprehensive properties in the temperature range of -253°C to 700°C, has the highest yield strength among wrought superalloys below 650°C, and has excellent creep, fatigue and long-term tissue stability. It also has good machining, welding and long-term tissue stability, and can be used for manufacturing various complex-shaped parts. Due to its excellent high-temperature performance and special physical properties, it is widely used in the manufacture of key parts in the aerospace field, especially in the engine field. With the continuous expansion of the engine field, the consumption is increasing day by day. At present, it has become the most successful and widely used alloy in the field of superalloys.
[0003] At present, the disk-ring forgings of GH4169 alloy are usually formed by die forging. Die forging is mainly used for forming small-sized disk-ring forgings of GH4169 alloy. For large-sized GH4169 alloy thick-walled disk-ring forgings with thick walls, heavy weights and large projection areas, due to the large deformation force required for forging and the deep die cavity depth, the required equipment tonnage for forging is large and the machining allowance of the forgings is large, resulting in a significant increase in the production cost of the forgings. Summary of the Invention
[0004] The technical problem to be solved by the present invention is to provide a die forging forming method of large-sized GH4169 alloy thick-walled disk-ring forgings, which can effectively reduce the equipment tonnage required for forming large-sized GH4169 alloy thick-walled disk-ring forgings, reduce the dependence on equipment tonnage, realize small equipment for large jobs, and can reduce the machining allowance of the forgings and save the production cost of the forgings.
[0005] To solve the above technical problems, the technical solutions adopted by the present invention include the following steps:
[0006] Preparation of thick-walled rectangular ring blanks: Take GH4169 alloy bars of a certain specification, and obtain thick-walled rectangular ring blanks after upsetting, punching and pre-rolling processes;
[0007] Preparation of "V" - shaped blank: After heating and heat - insulating the thick - walled rectangular ring blank, the "V" - shaped blank is prepared by the process of die - forging forming. First step: Centrally place the thick - walled rectangular ring blank in the lower die, centrally place the primary pre - forming punch on the thick - walled rectangular ring blank, and place the primary pre - forming height - limiting spacer on the upper end face of the lower die. Second step: Control the press to lower the primary pre - forming punch until the upper end face of the primary pre - forming punch is flush with the upper end face of the primary pre - forming height - limiting spacer, then stop lowering the press. Third step: Remove the primary pre - forming punch, centrally place the secondary pre - forming punch on the ring blank, and replace the primary pre - forming height - limiting spacer with the secondary pre - forming height - limiting spacer. Fourth step: Control the press to lower the secondary pre - forming punch until the upper end face of the secondary pre - forming punch is flush with the upper end face of the secondary pre - forming height - limiting spacer, then stop lowering the press to obtain the "V" - shaped blank.
[0008] Preparation of "W" - shaped blank: After heating and heat - insulating the "V" - shaped blank, the "W" - shaped blank is prepared by the process of die - forging forming. First step: Centrally place the "V" - shaped blank in the lower die, centrally place the tertiary pre - forming punch on the "V" - shaped blank, and place the tertiary pre - forming height - limiting spacer on the upper end face of the lower die. Second step: Control the press to lower the tertiary pre - forming punch until the upper end face of the tertiary pre - forming punch is flush with the upper end face of the tertiary pre - forming height - limiting spacer, then stop lowering the press to obtain the "W" - shaped blank.
[0009] Forging forming: After heating and heat - insulating the "W" - shaped blank, the forging is formed by the process of die - forging forming. First step: Centrally place the "W" - shaped blank in the lower die, centrally place both the tertiary pre - forming punch and the forming punch on the "W" - shaped blank, and place the tertiary pre - forming height - limiting spacer on the upper end face of the lower die. Second step: Control the press to lower the forming punch until the forming punch is flush with the upper end faces of the tertiary pre - forming punch and the tertiary pre - forming height - limiting spacer, then stop lowering the press to obtain a large - sized GH4169 alloy thick - walled disk - ring forging.
[0010] Particularly, for the die - forging forming method of the large - sized GH4169 alloy thick - walled disk - ring forging of the present invention, three consecutive die - forging formations are adopted. First, two die - forging pre - formations are carried out to prepare the "V" - shaped blank and the "W" - shaped blank, and then the die - forging forming is carried out by using a split - type final forming punch to obtain the large - sized GH4169 alloy thick - walled disk - ring forging.
[0011] Particularly, for the die - forging forming method of the large - sized GH4169 alloy thick - walled disk - ring forging of the present invention, the split - type final forming punch is decomposed into a tertiary pre - forming punch and a forming punch.
[0012] Particularly, for the large - sized GH4169 alloy thick - walled disk - ring forging of the present invention, the maximum outer diameter reaches more than 1.3 meters, and the weight of a single forging reaches more than 1800 kg.
[0013] Compared with the prior art, the beneficial effects of the present invention are as follows:
[0014] The method for die forging forming of large-sized GH4169 alloy thick-walled disk ring forgings according to the present invention adopts continuous three-time die forging forming. First, two die forging pre-formings are carried out to prepare a "V"-shaped blank and a "W"-shaped blank. By decomposing the final forming punch, the problem of insufficient equipment tonnage caused by directly using an integral forming punch for die forging forming is avoided, realizing small equipment for large work; by adopting the continuous combined forging die forging forming method, the outer contour of the large-sized GH4169 alloy thick-walled disk ring forgings finally obtained is closer to the part shape than the forgings obtained by directly using an integral forming punch for die forging forming, which can reduce the machining allowance of the forgings and save the production cost of the forgings. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] The present invention will be further described in detail below with reference to the drawings and specific embodiments.
[0016] Figure 1 It is a schematic diagram of the preparation process of the "V"-shaped blank according to the present invention.
[0017] Figure 2 It is a schematic diagram of the preparation process of the "W"-shaped blank according to the present invention.
[0018] Figure 3 It is a schematic diagram of the final forming of the large-sized GH4169 alloy thick-walled disk ring forgings according to the present invention. SPECIFIC EMBODIMENTS
[0019] To implement the method for die forging forming of the large-sized GH4169 alloy thick-walled disk ring forgings according to the present invention, equipment such as a forging heating furnace, a press, a manipulator, and a ring rolling mill needs to be provided. The specific implementation manners of this method include the following steps:
[0020] (1) Preparation of thick-walled rectangular ring blank: Take a GH4169 alloy bar of a certain specification, and after upsetting, punching, and pre-rolling processes, a thick-walled rectangular ring blank 10 is obtained;
[0021] (2) Preparation of "V"-shaped blank: After heating and insulating the thick-walled rectangular ring blank 10, a die forging forming process is adopted to prepare the "V"-shaped blank. The die used in the process of preparing the "V"-shaped blank includes a lower die 11, a first pre-forming punch 12, a first pre-forming height-limiting spacer 13, a second pre-forming punch 14, and a second pre-forming height-limiting spacer 15. The specific steps of preparing the "V"-shaped blank are as Figure 1Shown as follows: First step, center the thick-walled rectangular ring blank 10 in the lower die 11, center the primary preforming punch 12 on the thick-walled rectangular ring blank 10, and place the primary preforming height-limiting spacer 13 on the upper end face of the lower die 11; Second step, control the press to lower the primary preforming punch 12 until the upper end face of the primary preforming punch 12 is flush with the upper end face of the primary preforming height-limiting spacer 13, then stop lowering the press; Third step, remove the primary preforming punch 12, center the secondary preforming punch 14 on the ring blank, and replace the primary preforming height-limiting spacer 13 with the secondary preforming height-limiting spacer 15; Fourth step, control the press to lower the secondary preforming punch 14 until the upper end face of the secondary preforming punch 14 is flush with the upper end face of the secondary preforming height-limiting spacer 15, then stop lowering the press to obtain the "V"-shaped blank 20.
[0022] (3) Preparation of the "W"-shaped blank: Heat and keep the "V"-shaped blank 20 warm, and then use the open-die forging process to prepare the "W"-shaped blank. The open die used in the process of preparing the "W"-shaped blank includes the lower die 11, the tertiary preforming punch 21, and the tertiary preforming height-limiting spacer 22. The specific steps for preparing the "W"-shaped blank are as Figure 2 shown as follows: First step, center the "V"-shaped blank 20 in the lower die 11, center the tertiary preforming punch 21 on the "V"-shaped blank 20, and place the tertiary preforming height-limiting spacer 22 on the upper end face of the lower die 11; Second step, control the press to lower the tertiary preforming punch 21 until the upper end face of the tertiary preforming punch 21 is flush with the upper end face of the tertiary preforming height-limiting spacer 22, then stop lowering the press to obtain the "W"-shaped blank 30.
[0023] (4) Forging forming: Heat and keep the "W"-shaped blank 30 warm, and then use the open-die forging process to form the forging. The open die used in the process of forging forming includes the lower die 11, the tertiary preforming punch 21, the forming punch 31, and the tertiary preforming height-limiting spacer 22. The specific steps for forging forming are as Figure 3 shown as follows: First step, center the "W"-shaped blank 30 in the lower die 11, center both the tertiary preforming punch 21 and the forming punch 31 on the "W"-shaped blank 30, and place the tertiary preforming height-limiting spacer 22 on the upper end face of the lower die 11; Second step, control the press to lower the forming punch 31 until the forming punch 31 is flush with the upper end faces of the tertiary preforming punch 21 and the tertiary preforming height-limiting spacer 22, then stop lowering the press to obtain the large-sized GH4169 alloy thick-walled disk ring forging.
[0024] The die forging forming method of the large-sized GH4169 alloy thick-wall disk ring forging described in the present invention adopts continuous three-time die forging. First, two die pre-formings are carried out to prepare a "V"-shaped blank and a "W"-shaped blank. By decomposing the final forming punch, the problem of insufficient equipment tonnage caused by directly using an integral forming punch for die forging is avoided, realizing the use of small equipment for large-scale work. By adopting the continuous combined forging die forging forming method, the outer contour of the large-sized GH4169 alloy thick-wall disk ring forging finally obtained is closer to the part shape than the forging obtained by directly using an integral forming punch for die forging, which can reduce the machining allowance of the forging and save the production cost of the forging.
[0025] The decomposition of the final forming punch for die forming of the large-sized GH4169 alloy thick-wall disk ring forging described in the present invention refers to dividing the forming punch into three pre-forming punches 21 and a forming punch 31 as shown in Figure 3 . By decomposing the forming punch into two parts and keeping the three pre-forming punches 21 not stressed, the final forming of the forging can be achieved only by pressing down the forming punch 31 with a press.
[0026] The maximum outer diameter of the large-sized GH4169 alloy thick-wall disk ring forging described in the present invention is more than 1.3 meters, and the weight of a single forging is more than 1800 kg.
Claims
1. A die forging forming method for a large-sized GH4169 alloy thick-walled disk ring forging, characterized in that, It includes the following steps: Preparation of thick-walled rectangular ring blank: Take GH4169 alloy bars of a certain specification, and after upsetting, punching, and pre-rolling processes, obtain a thick-walled rectangular ring blank; Preparation of "V"-shaped blank: After heating and insulating the thick-walled rectangular ring blank, use the die forging process to prepare the "V"-shaped blank. First step, place the thick-walled rectangular ring blank in the lower die in the center, place the first pre-forming punch in the center on the thick-walled rectangular ring blank, and place the first pre-forming height-limiting spacer on the upper end face of the lower die; Second step, control the press to lower the first pre-forming punch until the upper end face of the first pre-forming punch is flush with the upper end face of the first pre-forming height-limiting spacer, and stop lowering the press; Third step, take out the first pre-forming punch, place the second pre-forming punch in the center on the ring blank, and replace the first pre-forming height-limiting spacer with the second pre-forming height-limiting spacer; Fourth step, control the press to lower the second pre-forming punch until the upper end face of the second pre-forming punch is flush with the upper end face of the second pre-forming height-limiting spacer, and stop lowering the press to obtain the "V"-shaped blank; Preparation of "W"-shaped blank: After heating and insulating the "V"-shaped blank, use the die forging process to prepare the "W"-shaped blank. First step, place the "V"-shaped blank in the lower die in the center, place the third pre-forming punch in the center on the "V"-shaped blank, and place the third pre-forming height-limiting spacer on the upper end face of the lower die; Second step, control the press to lower the third pre-forming punch until the upper end face of the third pre-forming punch is flush with the upper end face of the third pre-forming height-limiting spacer, and stop lowering the press to obtain the "W"-shaped blank. Forging forming: After heating and insulating the "W"-shaped blank, use the die forging process to form the forging. First step, place the "W"-shaped blank in the lower die in the center, place both the third pre-forming punch and the forming punch in the center on the "W"-shaped blank, and place the third pre-forming height-limiting spacer on the upper end face of the lower die; Second step, control the press to lower the forming punch until the forming punch is flush with the upper end faces of the third pre-forming punch and the third pre-forming height-limiting spacer, and stop lowering the press to obtain a large-sized GH4169 alloy thick-walled disk ring forging.
2. The die forging forming method of the large-sized GH4169 alloy thick-walled disk ring forging according to claim 1, characterized in that, Adopt continuous three-time die forging. First, perform two-time die pre-forming to prepare the "V"-shaped blank and the "W"-shaped blank, and then use the split-type final forming punch for die forging to obtain a large-sized GH4169 alloy thick-walled disk ring forging.
3. The die forging forming method of the large-sized GH4169 alloy thick-walled disk ring forging according to claim 1, characterized in that, The split-type final forming punch is decomposed into a third pre-forming punch and a forming punch.
4. The die forging forming method of the large-sized GH4169 alloy thick-walled disk ring forging according to claim 1, characterized in that The maximum outer diameter of the large-sized GH4169 alloy thick-walled disk ring forging reaches more than 1.3 meters, and the weight of a single forging reaches more than 1800 kg.