Metal forging processing technology
By optimizing the metal forging process, including steps such as heating, hammering, centering, punching, and drawing and rounding, the problems of large allowance and low utilization rate of heavy forgings have been solved, resulting in cost reduction and performance improvement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CHONGQING YANLIAN HEAVY MACHINERY EQUIP
- Filing Date
- 2022-08-31
- Publication Date
- 2026-07-21
AI Technical Summary
In traditional metal forging processes, heavy forgings have large raw material margins and low utilization rates, resulting in high production costs.
The process involves heating the metal billet to 850℃~900℃, then pressing and hammering it in the initial forging mold to form a connected first and second section. After demolding, the billet is centered and punched, and then elongated and rounded to the preset size in the forming device. The elongation and rounding process of the intermediate forging billet is strictly controlled, and the processing procedure and equipment structure are optimized.
This reduces the number of heating cycles for the initial forging blank, lowers production costs, and improves the utilization rate of the metal blank and the mechanical properties of the metal forging.
Smart Images
Figure CN117655256B_ABST
Abstract
Description
Technical Field
[0001] This disclosure relates to the field of workpiece processing technology, and in particular to a metal forging processing technology. Background Technology
[0002] Copper forgings are workpieces or blanks obtained by forging copper metal billets. Applying pressure to the copper billet causes plastic deformation, which alters its mechanical properties. Forgings can be classified into cold forging, warm forging, and hot forging based on the temperature at which the billet is processed. Hot forging is performed at a temperature higher than the recrystallization temperature of the metal billet. Traditional metal forging production lines typically involve different processes such as heating, billet preparation, forging, and trimming, all carried out in different workshops.
[0003] In related technologies, the machining allowance of forgings varies depending on parameters such as weight, shape complexity, heating conditions, and material properties. Generally, the greater the weight, the more complex the shape, the higher the heating temperature, and the more heating cycles, the larger the machining allowance. However, for heavy forgings, a larger machining allowance results in lower utilization of the metal billet and higher production costs. Therefore, finding a new process for machining heavy forgings is imperative. Summary of the Invention
[0004] This disclosure provides a metal forging processing technology to solve the technical problems of large raw material allowance and low utilization rate in traditional metal forging processing technology.
[0005] Therefore, this disclosure provides a metal forging processing technology, including:
[0006] Heat the metal billet to 850℃~900℃;
[0007] The heated metal billet is placed in a primary forging mold, and pressure and hammering are applied to obtain a primary forging billet with a first section and a second section connected together, wherein the radial dimension of the first section is larger than the radial dimension of the second section.
[0008] The initial forging blank is demolded, centered, and punched to obtain the intermediate forging blank with a first inner hole, which extends through the first and second sections.
[0009] The forging billet is stretched and rounded in a forming device to a preset size to obtain the target metal forging; wherein the operating temperature of the initial forging billet, the intermediate forging billet and the target metal forging are all greater than or equal to 620℃~680℃.
[0010] In one possible implementation, the forming device includes a rotating component and a hammering component arranged vertically. The rotating component includes a rotating rod and a positioning plate connected together. The hammering component is located above the rotating rod. The specific steps for elongating and rounding the intermediate forging billet include:
[0011] The first inner hole of the forging billet is fitted outside the rotating rod, and the first section of the forging billet away from the second section is abutted against the positioning plate.
[0012] The control rod rotates at a first rotation speed, while the hammer is driven to hammer the outer wall of the first section of the forging billet at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod.
[0013] The rotating rod is controlled to rotate at a second rotational speed and move axially at a first axial speed, while the hammering component is driven to hammer the outer wall of the second section at a second hammering speed, so that the second section is stretched evenly along the axial direction.
[0014] In one possible implementation, the rotating rod is arranged laterally, with its axis at a first height position and the hammering component at a second height position. The rotating rod is controlled to rotate at a second rotational speed and move axially at a first axial speed, while simultaneously driving the hammering component to hammer against the outer wall of the second section at a second hammering speed. The specific steps for uniformly elongating the second section axially include:
[0015] The control rod rotates at a speed of 10-15% of the ratio of the area covered by the hammer on the outer wall of the second section to the area covered by the previous section, and the ratio of the axial feeding length of the rotating rod in a single operation to the contact length of the hammer on the axial direction of the rotating rod is greater than or equal to 0.5-0.7. At the same time, the hammer is driven to move to the second height position at a second hammering speed to obtain a second section that is uniformly elongated along the axial direction.
[0016] In one possible implementation, the hammer has a third height position located close to the first height position, and the metal forging also has a third segment located on the side of the second segment away from the first segment. Following the step of uniformly elongating the second segment axially, the following is also included:
[0017] The control rod rotates at a speed of 10-15% of the ratio of the area covered by the hammer on the outer wall of the third section to the area covered by the previous section, and the ratio of the axial feeding length of the rotating rod in a single operation to the contact length of the hammer on the axial direction of the rotating rod is greater than or equal to 0.5-0.7. At the same time, the hammer is driven to move to the third height position at the third hammering speed to obtain the third section that is uniformly elongated along the axial direction.
[0018] In one possible implementation, the hammer has a fourth height position, located on the side of the second height position away from the third height position. The specific steps of controlling the rotating rod to rotate at a first rotational speed, while simultaneously driving the hammer to hammer the outer wall of the first section of the forging blank at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod, include:
[0019] The control rotating rod rotates at a speed of 10-15% of the ratio of the area covered by the hammer on the outer wall of the second section to the area covered by the previous section, while simultaneously driving the hammer to move to the fourth height position at the first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod.
[0020] In one possible implementation, the specific steps for demolding the initial forging blank include:
[0021] Multiple take-out dies are placed at intervals on the take-out bottom die. The multiple take-out dies are arranged around the thin end of the initial forging blank die. Then, the initial forging blank die is stamped onto the multiple take-out dies at a first stamping speed to remove the initial forging blank from the initial forging blank die.
[0022] In one possible implementation, the specific steps of centering and punching to obtain a forging blank with a first inner hole include:
[0023] The initial forging blank is clamped and the axis of the first section is aligned with the axis of the first punch. It is then punched onto the first punch at a second punching speed to form a first centering hole in the first section.
[0024] Clamp the initial forging blank and align the axis of the second section with the axis of the second punch, then press it onto the second punch at a third pressing speed to form a second centering hole in the second section;
[0025] Continue hammering the second punch and the first punch until the second punch and the first punch abut in the initial forging blank and form the first through hole in the intermediate forging blank;
[0026] Replace the third punch to enlarge the first through hole until a medium forging blank with a first inner hole is obtained.
[0027] In one possible implementation, the specific steps of applying pressure and hammering include:
[0028] The metal blank placed in the initial forging die is subjected to a first punch and hammering for a first duration until the metal blank fills the inner cavity of the initial forging die.
[0029] In one possible implementation, the temperature of the initial forging die is greater than or equal to 500°C to 600°C.
[0030] In one possible implementation, the specific steps of heating the metal billet to 850°C–900°C include: heating the metal billet at 850°C–900°C for 0.55–0.65 min / mm; and / or,
[0031] The specific steps for operating the primary forging billet, intermediate forging billet, and target metal forging at temperatures greater than or equal to 620℃~680℃ include: heating the cooled primary forging billet, intermediate forging billet, or target metal forging at 850℃~900℃ for 0.35~0.45min / mm duration.
[0032] According to the metal forging processing technology provided in this disclosure, it includes: heating a metal billet to 850℃~900℃; placing the heated metal billet in a primary forging mold, applying pressure and hammering it to obtain a primary forging billet with a first segment and a second segment connected together, wherein the radial dimension of the first segment is larger than the radial dimension of the second segment; demolding, centering, and punching the primary forging billet to obtain a secondary forging billet with a first inner hole, the first inner hole penetrating the first segment and the second segment; elongating and rounding the secondary forging billet in a forming device to a preset size to obtain the target metal forging; wherein the operating temperature of the primary forging billet, the secondary forging billet, and the target metal forging is greater than or equal to 620℃~680℃. This technical solution, by optimizing the metal forging processing technology, overcomes the production problems of large allowances and low billet utilization in heavy forgings. Specifically, the metal billet is first heated to 850℃~900℃ to change its internal density. Then, the metal billet is placed in the initial forging mold and hammered to change the reasonable distribution of the metal billet on its axial section, so that the approximate size of the obtained initial forging billet is close to the final forging size, thereby reducing the forming difficulty of the final forging. Next, the initial forging billet is demolded, centered, and punched. The operation is simple and efficient, effectively reducing the number of heating times of the initial forging billet and lowering the production cost. Finally, the elongation and rounding process of the intermediate forging billet is strictly controlled to obtain the target metal forging. Attached Figure Description
[0033] To more clearly illustrate the technical solutions in the embodiments of this disclosure or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, those skilled in the art can obtain other drawings based on these drawings without creative effort. In addition, in the drawings, the same parts use the same reference numerals, and the drawings are not drawn to scale.
[0034] Figure 1 A schematic flowchart illustrating the metal forging process provided in this embodiment of the disclosure;
[0035] Figure 2 A process flow diagram of the forging billet provided in the embodiments of this disclosure;
[0036] Figure 3 A process flow diagram for the second segment provided in this embodiment of the disclosure;
[0037] Figure 4A process flow diagram for another type of forging blank provided in this embodiment of the disclosure;
[0038] Figure 5 A process flow diagram for the first segment provided in this embodiment of the disclosure;
[0039] Figure 6 A process flow diagram of the initial forging billet provided in the embodiments of this disclosure;
[0040] Figure 7 A process flow diagram of the metal billet provided in the embodiments of this disclosure;
[0041] Figure 8 A process flow diagram of the metal forging provided in the embodiments of this disclosure. Detailed Implementation
[0042] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0043] See Figure 1 This disclosure provides a metal forging processing technology, including:
[0044] Step S1: Heat the metal billet to 850℃~900℃;
[0045] Step S2: Place the heated metal billet in the initial forging mold, apply pressure and hammer it to obtain an initial forging billet with a first segment and a second segment connected together, wherein the radial dimension of the first segment is greater than the radial dimension of the second segment.
[0046] Step S3: Demold, center, and punch the initial forging blank to obtain the intermediate forging blank with the first inner hole, which extends through the first section and the second section.
[0047] Step S4: The forging billet is stretched and rounded in the forming device to the preset size to obtain the target metal forging; wherein the operating temperature of the initial forging billet, the intermediate forging billet and the target metal forging are all greater than or equal to 620℃~680℃.
[0048] In this embodiment, the processing technology of metal forgings is optimized to overcome the production problems of large allowance and low billet utilization rate of heavy forgings.
[0049] Specifically, the metal billet is first heated to 850℃~900℃ to change its internal density. Then, the metal billet is placed in the initial forging mold and hammered to change the reasonable distribution of the metal billet on its axial section, so that the approximate size of the obtained initial forging billet is close to the final forging size, thereby reducing the forming difficulty of the final forging. Next, the initial forging billet is demolded, centered, and punched. The operation is simple and efficient, effectively reducing the number of heating times of the initial forging billet and lowering the production cost. Finally, the elongation and rounding process of the intermediate forging billet is strictly controlled to obtain the target metal forging.
[0050] In addition, after heat treatment, metal forgings can eliminate porosity and voids in the metal through forging, thereby improving the mechanical properties of the metal forgings.
[0051] See Figure 2 In one possible implementation, the forming device includes a rotating component and a hammering component arranged vertically. The rotating component includes a rotating rod and a positioning plate connected together. The hammering component is located above the rotating rod. The specific steps for elongating and rounding the forged billet include:
[0052] Step S41: Fit the first inner hole of the forging billet outside the rotating rod, and at the same time, abut the side of the first section of the forging billet away from the second section against the positioning plate.
[0053] Step S42: Control the rotating rod to rotate at a first rotation speed, and at the same time drive the hammer to hammer at a first hammering speed onto the outer wall of the first section of the forging billet, so that the inner diameter of the first section matches the outer diameter of the rotating rod.
[0054] Step S43: Control the rotating rod to rotate at the second rotation speed and make the rotating rod move axially at the first axial speed, while driving the hammer to hammer the outer wall of the second section at the second hammering speed, so that the second section is evenly stretched along the axial direction.
[0055] In this embodiment, in order to elongate and round the forged billet and process it into shape, not only is the specific structure of the forming device optimized, but the processing procedure of the forged billet is also optimized.
[0056] Specifically, the forming device is configured as a combination of at least a rotating component and a hammering component. The forging billet is rotated by the rotating component to deliver it to different positions in the circumferential direction below the hammering component; then, the hammering component hammers the outer wall of the forging billet located below it, thereby forging the forging billet.
[0057] During processing, the intermediate forging blank is first placed on the outside of the rotating rod, with its first end abutting against the positioning plate. This ensures that the outer circle of the positioning plate and its concentricity with the first inner hole of the intermediate forging blank are consistent, thereby improving the quality of the target metal forging. Then, the first section of the intermediate forging blank is processed to meet the requirements of the target metal forging. Finally, the second section of the intermediate forging blank is processed to meet the requirements of the target metal forging, thus obtaining the target metal forging. Further, during the processing of the first section of the intermediate forging blank, the rotating rod is controlled to rotate at a first rotational speed, while simultaneously driving the hammer to hammer against the outer wall of the first section at a first hammering speed. This reduces the inner hole of the first section, allowing it to abut against the outer wall of the rotating rod.
[0058] This embodiment involves segmented forging of the forged billet. When processing the first segment, no lengthening is required; therefore, only the rotation of the rotating rod needs to be controlled. However, when processing the second segment, lengthening is necessary. Therefore, while controlling the rotation of the rotating rod, its axial movement must also be controlled to achieve the axial lengthening of the second segment. Since the first segment has a thicker wall and the second segment has a thinner wall, the first hammering speed is set to be greater than the second hammering speed. This improves forging efficiency while reducing the damage and scrap rate of the second segment.
[0059] In one example, the first rotational speed is 7 r / min to 13 r / min, and the first striking speed is 35 to 45 times / min. The second rotational speed is 12 r / min to 18 r / min, and the second striking speed is 15 to 25 times / min. For example, but not limited to, the first rotational speed is 10 r / min, and the first striking speed is 40 times / min; the second rotational speed is 15 r / min, and the second striking speed is 20 times / min.
[0060] In one example, the rotating rod is arranged laterally and can rotate horizontally. The hammering element is arranged longitudinally and can reciprocate vertically. For example, but not limited to, the rotating element is a mandrel flange with a T-shaped structure, the rotating rod is a mandrel, and the positioning plate is a flange. The outer wall of the mandrel is inclined, and the mandrel gradually tapers away from the flange.
[0061] In one example, to improve the stability of the forging billet during the drawing and rounding process, the forming device is configured as a combination of at least a rotating component, a hammering component, and a V-shaped anvil. The hammering component is positioned above the rotating component, and the V-shaped anvil is spaced apart and positioned directly below the hammering component. The rotating component is laterally arranged between the hammering component and the V-shaped anvil. When the forging billet is fitted onto the rotating component, the bottom of the forging billet is engaged in the V-shaped structure of the V-shaped anvil, and the top of the forging billet is directly below the hammering component.
[0062] See Figure 3 In one possible implementation, the rotating rod is arranged laterally, with its axis at a first height position and the hammering component at a second height position. The rotating rod is controlled to rotate at a second rotational speed and move axially at a first axial speed, while simultaneously driving the hammering component to hammer against the outer wall of the second section at a second hammering speed. The specific steps for uniformly elongating the second section axially include:
[0063] Step S431: Control the rotating rod to rotate at a speed of 10-15% of the ratio of the last coverage area to the previous coverage area of the hammer on the outer wall of the second section, and make the ratio of the single axial feeding length of the rotating rod to the contact length of the hammer on the axial direction of the rotating rod greater than or equal to 0.5-0.7. At the same time, drive the hammer to move to the second height position at the second hammering speed to obtain the second section that is uniformly stretched along the axial direction.
[0064] In this embodiment, the processing of the second section of the forged billet is parameterized. Specifically, the rotation speed of the rotating rod must be strictly controlled to ensure uniform stress and consistent deformation across the tangential section of the second section, thereby achieving uniform longitudinal elongation of the second section. This results in consistent wall thickness and high stability after elongation. Simultaneously, the single axial feeding length of the rotating rod must also be strictly controlled to avoid folding due to insufficient single axial feeding length, leading to low production efficiency; and to avoid unevenness along the longitudinal direction of the second section due to excessive single axial feeding length.
[0065] See Figure 4 In one possible implementation, the hammer has a third height position located close to the first height position, and the metal forging also has a third segment located on the side of the second segment away from the first segment. Following the step of uniformly elongating the second segment axially, the following is also included:
[0066] Step S44: Control the rotating rod to rotate at a speed of 10-15% of the ratio of the last coverage area of the hammer on the outer wall of the third section to the previous coverage area, and make the ratio of the single axial feeding length of the rotating rod to the contact length of the hammer on the axial direction of the rotating rod greater than or equal to 0.5-0.7. At the same time, drive the hammer to move to the third height position at the third hammering speed to obtain the third section that is uniformly stretched along the axial direction.
[0067] In this embodiment, the target metal forging includes at least three forging sections with different wall thicknesses and two boss structures. The machining of the third section of the metal forging is parameterized.
[0068] In one example, the third striking speed is 3 r / min to 8 r / min. For example, but not limited to, the third striking speed is 5 r / min.
[0069] See Figure 5 In one possible implementation, the hammer has a fourth height position, located on the side of the second height position away from the third height position. The specific steps of controlling the rotating rod to rotate at a first rotational speed, while simultaneously driving the hammer to hammer the outer wall of the first section of the forging blank at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod, include:
[0070] Step S421: Control the rotating rod to rotate at a speed of 10-15% of the ratio of the last coverage area to the previous coverage area on the outer wall of the second section, and simultaneously drive the hammer to move to the fourth height position at the first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod.
[0071] In this embodiment, the processing of the first section of the forged billet is parameterized. Specifically, the rotation speed of the rotating rod needs to be strictly controlled to ensure that the tangential section of the first section is subjected to uniform force and consistent deformation, thereby achieving uniform rounding of the first section in the radial direction. This results in uniform wall thickness and high stability after the first section is rounded.
[0072] See Figure 6 In one possible implementation, the specific steps for demolding the initial forging blank include:
[0073] Step S31: Place multiple take-out molds at intervals on the take-out bottom mold. The multiple take-out molds are arranged around the thin end of the initial forging blank mold. Then, press the initial forging blank mold onto the multiple take-out molds at the first stamping speed to remove the initial forging blank from the initial forging blank mold.
[0074] In this embodiment, the demolding operation of the initial forging billet is configured. Specifically, multiple material-retrieving dies are configured to cooperate with the initial forging die for material-retrieving operations. For example, but not limited to, the material-retrieving die is a die pad.
[0075] In one example, the first stamping speed is 10 cm / s to 50 cm / s. For example, but not limited to, the first stamping speed is 10 cm / s.
[0076] See Figure 6 In one possible implementation, the specific steps of centering and punching to obtain a forging billet with a first inner hole include:
[0077] Step S32: Clamp the initial forging blank and align the axis of the first section with the axis of the first punch, and punch it onto the first punch at the second punching speed to form the first centering hole in the first section.
[0078] Step S33: Clamp the initial forging blank and align the axis of the second section with the axis of the second punch, and punch it onto the second punch at the third punching speed to form a second centering hole in the second section.
[0079] Step S34: Continue hammering the second punch and the first punch until the second punch and the first punch abut in the initial forging billet and form the first through hole in the intermediate forging billet;
[0080] Step S35: Replace the third punch to enlarge the first through hole until a forging blank with a first inner hole is obtained.
[0081] In this embodiment, the centering punching operation of the initial forging billet is configured. Specifically, double-sided centering punching is used, which can effectively prevent the inner hole from tilting and ensure the concentricity of the inner hole of the initial forging billet. At the same time, double-sided punching can also reduce punching time, reduce the number of punching passes, reduce energy consumption, improve production efficiency, ensure the appearance quality of the initial forging billet, and provide a good foundation for subsequent operations.
[0082] For example, but not limited to, the first and second punches are of the same type. The third punch comes in various sizes to facilitate coordinated operation and quickly enlarge the inner hole of the initial forging blank to the size of the first inner hole, thereby shortening the centering and enlarging time and improving production efficiency.
[0083] In one example, the second stamping speed is 5 m / s to 10 m / s, and the third stamping speed is 5 m / s to 10 m / s. For example, but not limited to, the second stamping speed is 7 m / s, and the third stamping speed is 7 m / s.
[0084] See Figure 7 In one possible implementation, the specific steps of applying pressure and hammering include:
[0085] Step S21: Apply a first punch and hammer for a first duration to the metal billet placed in the initial forging die until the metal billet fills the inner cavity of the initial forging die.
[0086] In this embodiment, the metal billet is processed to change the internal density and pore size of the metal in order to obtain a preliminary forging billet.
[0087] In one example, the first pressure is 4500 kPa to 8000 kPa, and the first duration is 1 min to 10 min. For example, but not limited to, the first pressure is 7700 Pa, and the first duration is 3 min.
[0088] In one possible implementation, the temperature of the initial forging die is greater than or equal to 500°C to 600°C.
[0089] In this embodiment, in order to reduce the heat loss of the metal billet during processing in the initial forging die, the initial forging die is configured as a high-temperature die.
[0090] See Figure 8 In one possible implementation, the specific steps of heating the metal billet to 850°C to 900°C include: heating the metal billet at 850°C to 900°C for 0.55 to 0.65 min / mm.
[0091] In this embodiment, the metal billet is heat-processed by holding it at a preset temperature for a certain period of time, thereby ensuring the uniformity of heating of the metal billet and improving the forging stability.
[0092] See Figure 8 In one possible implementation, the specific steps of operating the initial forging blank, intermediate forging blank, and target metal forging at temperatures greater than or equal to 620°C to 680°C include: heating the cooled initial forging blank, intermediate forging blank, or target metal forging at 850°C to 900°C for 0.35 to 0.45 min / mm duration.
[0093] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0094] The above description is merely a specific embodiment of this disclosure, enabling those skilled in the art to understand or implement it. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this disclosure. Therefore, this disclosure is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A metal forging processing technology, characterized in that, include: Heat the metal billet to 850℃~900℃; The heated metal billet is placed in a primary forging mold, and pressure and hammering are applied to obtain a primary forging billet with a first segment and a second segment connected together, wherein the radial dimension of the first segment is greater than the radial dimension of the second segment. The initial forging blank is demolded, centered, and punched to obtain an intermediate forging blank with a first inner hole, the first inner hole penetrating the first section and the second section; The intermediate forging billet is stretched and rounded in a forming device to a preset size to obtain the target metal forging; wherein the operating temperature of the initial forging billet, the intermediate forging billet and the target metal forging is greater than or equal to 620℃~680℃. The forming device includes a rotating component and a hammering component arranged vertically. The rotating component includes a rotating rod and a positioning plate. The hammering component is located above the rotating rod. The specific steps of elongating and rounding the forged billet include: The first inner hole of the forged billet is fitted over the rotating rod, and the first section of the forged billet away from the second section is abutted against the positioning plate. The rotating rod is controlled to rotate at a first rotational speed, while the hammering component is driven to hammer the outer wall of the first section of the forging blank at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod. The rotating rod is controlled to rotate at a second rotational speed and to move axially at a first axial speed, while the hammering component is driven to hammer the outer wall of the second section at a second hammering speed, so that the second section is evenly stretched along the axial direction. The rotating rod is arranged laterally, with its axis at a first height position. The hammering component has a second height position. The specific steps of controlling the rotating rod to rotate at a second rotational speed and moving it axially at a first axial speed, while simultaneously driving the hammering component to hammer the outer wall of the second section at a second hammering speed, so that the second section is uniformly elongated axially, include: The rotating rod is controlled to rotate at a speed of 10-15% of the ratio of the subsequent coverage area of the hammer on the outer wall of the second section to the previous coverage area, and the ratio of the axial feeding length of the rotating rod in a single operation to the contact length of the hammer in the axial direction of the rotating rod is greater than or equal to 0.5-0.
7. At the same time, the hammer is driven to move to the second height position at a second hammering speed to obtain a second section that is uniformly elongated along the axial direction.
2. The metal forging processing technology according to claim 1, characterized in that, The hammering component has a third height position, which is located close to the first height position. The metal forging also has a third segment, which is located on the side of the second segment away from the first segment. After the step of uniformly elongating the second segment axially, the following is also included: The rotating rod is controlled to rotate at a speed of 10-15% of the ratio of the area covered by the hammer on the outer wall of the third section to the area covered by the previous section, and the ratio of the axial feeding length of the rotating rod in a single operation to the contact length of the hammer on the rotating rod in the axial direction is greater than or equal to 0.5-0.
7. At the same time, the hammer is driven to move to the third height position at a third hammering speed to obtain a third section that is uniformly elongated along the axial direction.
3. The metal forging processing technology according to claim 1, characterized in that, The hammer has a fourth height position, which is located on the side of the second height position away from the third height position. The specific steps of controlling the rotating rod to rotate at a first rotational speed and simultaneously driving the hammer to hammer the outer wall of the first section of the forging billet at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod, include: The rotating rod is controlled to rotate at a speed of 10-15% of the ratio of the area covered by the hammer on the outer wall of the second section to the area covered by the previous section, while the hammer is driven to move to the fourth height position at a first hammering speed, so that the inner diameter of the first section matches the outer diameter of the rotating rod.
4. The metal forging processing technology according to claim 1, characterized in that, The specific steps for demolding the initial forging billet include: Multiple material-retrieving molds are placed at intervals on the material-retrieving bottom mold, and the multiple material-retrieving molds are arranged around the thin end of the initial forging blank mold. Then, the initial forging blank mold is stamped onto the multiple material-retrieving molds at a first stamping speed to remove the initial forging blank from the initial forging blank mold.
5. The metal forging processing technology according to claim 4, characterized in that, The specific steps for centering and punching to obtain the intermediate forging billet with the first inner hole include: The initial forging blank is clamped and the axis of the first section is aligned with the axis of the first punch. It is then punched onto the first punch at a second punching speed to form a first centering hole in the first section. The initial forging blank is clamped and the axis of the second section is aligned with the axis of the second punch. It is then stamped onto the second punch at a third stamping speed to form a second centering hole in the second section. Continue hammering the second punch and the first punch until the second punch and the first punch abut against each other in the initial forging blank and form a first through hole in the intermediate forging blank; Replace the third punch to enlarge the first through hole until a medium forging blank with a first inner hole is obtained.
6. The metal forging processing technology according to claim 1, characterized in that, The specific steps of pressurization and hammering include: A first punch and hammering time is applied to the metal billet placed in the initial forging die until the metal billet fills the inner cavity of the initial forging die.
7. The metal forging processing technology according to claim 6, characterized in that, The temperature of the initial forging die is greater than or equal to 500℃~600℃.
8. The metal forging processing technology according to claim 1, characterized in that, The specific steps for heating the metal billet to 850℃~900℃ include: heating the metal billet at 850℃~900℃ for 0.55~0.65 min / mm; and / or, The specific steps for operating the initial forging blank, the intermediate forging blank, and the target metal forging at a temperature greater than or equal to 620℃~680℃ include: heating the cooled initial forging blank, the intermediate forging blank, or the target metal forging at 850℃~900℃ for 0.35~0.45 min / mm.