Flange forming forging process and equipment thereof
By integrating the flange forming process into one machine and using two sets of molds to achieve continuous flange forming, the problems of complex equipment and low production efficiency in the existing technology are solved, resulting in cost reduction and quality improvement.
Patent Information
- Application Number
- CN202511140830.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-15
- Publication Date
- 2025-11-28
AI Technical Summary
The existing flange forming and forging process has complex equipment and mold structures, resulting in high production costs, high equipment procurement and maintenance expenses, and low production efficiency and unstable product quality due to the transfer of billets between multiple processes.
The three processes of upsetting, extrusion and punching are integrated into one machine, using two sets of molds. The forming mold and the punching mold are driven by a hydraulic press to achieve continuous forming of flanges.
Significantly reduce production costs, improve production efficiency and product quality stability, reduce equipment footprint, enhance equipment parameter collaborative control capabilities, and reduce labor costs.
Smart Images
Figure CN121017431A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of forging technology, and particularly relates to a flange forming forging process and equipment. Background Technology
[0002] As a crucial connecting component in key parts of automotive transmission and braking systems, flanges directly affect the operational safety and reliability of vehicles due to their structural strength, dimensional accuracy, and surface quality. Because flanges must withstand significant torque, impact forces, and vibration loads during vehicle operation, extremely high requirements are placed on their forging process. Optimized distribution of metal flow lines must be achieved through a reasonable plastic deformation process to ensure the product's mechanical properties.
[0003] In existing technologies, the forming and forging of automotive flanges generally adopts a multi-stage, step-by-step processing mode. The most representative process route includes three core processes: upsetting, punching, and extrusion, each relying on independent molds and equipment. Specifically, the upsetting process is usually equipped with a dedicated upsetting mold and is completed using a screw press or a hot forging press. The upsetting mold consists of an upper mold and a lower mold. The lower mold has a cavity that matches the initial shape of the billet. The upper mold is driven downward by the equipment to apply axial pressure to the bar billet heated to the forging temperature, thereby reducing the billet height and increasing the cross-sectional area, thus obtaining a billet volume distribution that meets the requirements of subsequent processes.
[0004] After the upsetting is completed, the blank is transferred to the punching equipment by manual or mechanical conveying device using a special punching die. The punching die includes a punch and a die. The die has a through hole in the center that corresponds to the pre-forming size of the flange inner hole. The punch moves downward under the drive of the press, passing through the central area of the blank to achieve the preliminary forming of the flange inner hole, while removing the excess material core in the center.
[0005] After punching, the blank is transferred again to the extrusion process through an extrusion die, which typically uses a hydraulic press as the power source. The upper and lower dies of the extrusion die are respectively equipped with forming surfaces that match the final inner hole size and outer contour of the flange. Through the closing motion of the die, the inner hole of the blank is radially extruded to improve the dimensional accuracy and surface finish of the inner hole, while simultaneously correcting the outer diameter of the flange to meet the design requirements.
[0006] However, the aforementioned existing technical solutions have significant drawbacks. First, the equipment and mold structures are complex; three independent molds require separate design, manufacturing, and maintenance, necessitating high precision machining, which significantly increases production costs. Furthermore, assembly errors from different molds can easily accumulate, affecting product dimensional consistency. Second, three dedicated machines are required for the three processes, resulting in high equipment procurement costs and requiring substantial production space, increasing the complexity of the workshop layout. Third, the transfer of billets between processes requires additional conveyor systems or manual operation, extending the production cycle and reducing efficiency. Additionally, the billets are prone to deterioration in plasticity due to temperature drops during transfer, affecting subsequent molding quality. Finally, the coordinated operation of multiple machines requires more operators for monitoring and adjustment, leading to high labor costs. Furthermore, the coordination and control between equipment is challenging, and parameter mismatches can cause fluctuations in product qualification rates. Summary of the Invention
[0007] The purpose of this invention is to provide a flange forming and forging process and equipment, integrating three processes into one machine. Only two sets of molds are required, eliminating the procurement cost of a third machine in traditional processes, and also reducing the design, manufacturing, and maintenance costs of a single mold. The reduced number of machines lowers the workshop floor space, indirectly saving on site rental and management costs.
[0008] To achieve the above objectives, the technical solution of the present invention is as follows: a flange forming and forging process and equipment, including a hydraulic press, a frame, and a forming die and a punching die mounted on the frame. The forming die is used for upsetting and extruding holes in the parts, and the punching die is used for punching holes in the extruded parts.
[0009] The forming mold includes a main cylinder, a central cylinder, a forming slider, an extrusion punch, an upper forming mold assembly, and a lower forming mold assembly. The main cylinder is mounted on a frame, and the forming slider is slidably connected to the frame. The piston rod of the main cylinder drives the forming slider and the central cylinder to move. The forming slider has a vertical first working hole. The piston rod of the central cylinder is connected to the extrusion punch, and the piston rod of the central cylinder and the extrusion punch can move vertically within the first working hole. The upper forming mold assembly includes an upper forming template and an upper forming die. The lower forming mold assembly includes a lower forming template, a forming die, and a lower forming die assembly. A lower forming die; an upper forming die mounted on a forming slider; a lower forming die mounted on a frame; a lower forming die and a lower forming die mounted on the lower forming die; the lower forming die located inside the lower forming die; the lower forming die is used to form the circumferential direction of the flange; the lower forming die is used to form the lower side of the flange; both the upper forming die and the upper forming die are provided with a second working hole for the extrusion punch to pass through; the piston rod of the central cylinder drives the extrusion punch to move vertically to extrude holes in the upsetting part;
[0010] The punching die includes a punching cylinder, a punching slide, an upper punching die assembly, and a lower punching die assembly. The punching die is located on one side of the forming die, and the punching cylinder is mounted on the frame. The punching slide is connected to the piston rod of the punching cylinder. The upper punching die assembly includes a punching punch and an upper punching template. The upper punching template is mounted on the punching slide, and the punching punch is mounted on the upper punching template. The lower punching die assembly includes a lower punching template, a punching die, and a lower punch. The lower punching template is mounted on the frame, and the punching die and lower punch are mounted on the lower punching template. The lower punch is located inside the punching die. The punching die is used to position the flange circumferentially, and the lower punch is used to position the lower side of the flange. The lower punch has a punching hole directly opposite the punching punch, and the punching punch can move within the punching hole.
[0011] The hydraulic press is used to drive the main cylinder, the center cylinder, and the punching cylinder.
[0012] Furthermore, the bottom of the frame is also provided with an ejection mechanism, which includes an ejection cylinder and an ejection rod. The ejection cylinder is installed at the bottom of the frame, and the frame and the lower forming mold are provided with sliding holes. The ejection rod is vertically slidably connected in the sliding holes. The lower forming mold is provided with an ejection hole, and the ejection rod can move vertically in the ejection hole.
[0013] Furthermore, the ejector hole is a stepped hole with a larger upper portion and a smaller lower portion, and the smaller portion of the stepped hole matches the size of the sliding hole; the upper end of the ejector rod is provided with a limiting head, which is slidably connected in the larger portion of the stepped hole, and the limiting head can be completely retracted into the larger portion of the stepped hole and its upper end face is flush with the top of the punching die.
[0014] Furthermore, a pull rod is vertically slidably connected inside the upper punching template, and a material plate is fixed to the lower side of the pull rod. An elastic element is connected between the material plate and the upper punching template. The material plate is provided with a through hole for the punching punch to pass through.
[0015] Furthermore, a guide rod is connected to the punching slide block, a fixing block is provided on the cylinder body of the punching cylinder, a guide hole is provided on the fixing block, and the guide rod is slidably connected in the guide hole.
[0016] A flange forming and forging process, utilizing the aforementioned flange forming and forging equipment, includes the following steps:
[0017] Material preparation: Place the heated raw material into the lower forming mold and the lower forming mold;
[0018] Upsetting: In the initial state, the bottom of the extrusion punch is flush with the bottom of the upper forming die. The hydraulic press drives the piston rod of the main cylinder to move, which in turn drives the forming slide and the central cylinder to move. The downward movement of the forming slide causes the upper forming die assembly to move downward, resulting in the upper forming die pressing downward. The piston rod of the central cylinder drives the extrusion punch to move downward synchronously. The upper forming die, the forming cavity die, and the lower forming die work together to achieve upsetting.
[0019] Extrusion: The hydraulic press drives the piston rod of the central cylinder to move, and the piston rod of the central cylinder drives the extrusion punch to move downward a certain distance to achieve extrusion.
[0020] Punching: The hydraulic press drives the piston rods of the main cylinder and the center cylinder to return to their original positions, transferring the punched flange blank to the punching die assembly; the hydraulic press drives the piston rod of the punching cylinder to move downwards, and the piston rod of the punching cylinder drives the punching punch downwards through the punching slide, and the punching punch punches the flange blank in the punching die assembly; after punching is completed, the hydraulic press drives the punching cylinder to return to its original position and removes the punched flange.
[0021] The beneficial effects of this technical solution are as follows:
[0022] 1. Significantly reduce production costs and equipment investment. This solution integrates three processes into one machine, requiring only two sets of molds. This eliminates the purchase cost of a third machine in traditional processes, while also reducing the design, manufacturing, and maintenance costs of one set of molds. The reduction in the number of machines reduces the workshop floor space by more than 30%, indirectly saving on site rental and management costs. Furthermore, the reduced number of molds minimizes production interruptions caused by mold wear and replacement.
[0023] 2. Significantly improves production efficiency and product quality stability. No blank transfer is required between processes, avoiding the waiting time and temperature loss issues inherent in traditional processes, thus shortening the production cycle of a single product by 20%-30%. Continuous forming of the blank within the same equipment ensures more stable temperature and maintains optimal material plasticity, reducing forming defects caused by temperature fluctuations. Simultaneously, the parameters of the two sets of molds can be precisely and collaboratively controlled within the same equipment, avoiding dimensional errors caused by mismatched parameters across multiple machines, improving product dimensional consistency by over 15%.
[0024] 3. By integrating three processes into a single machine, the production flow changes from multiple machines operating in series to a single machine operating continuously, reducing the number of process connections and lowering the complexity of production management. The number of operators can be reduced from the traditional 3-4 people to 1-2 people, significantly reducing labor costs. Centralized maintenance of equipment and molds reduces the workload of scattered maintenance across multiple machines, improves equipment uptime, and provides more efficient and stable technical support for large-scale production. Attached Figure Description
[0025] Figure 1This is a schematic diagram of the structure of a flange forming and forging equipment according to the present invention;
[0026] Figure 2 for Figure 1 A cross-sectional view of the forming mold;
[0027] Figure 3 for Figure 1 A cross-sectional view of a punching die with a continuous skin.
[0028] Figure 4 This is a flange forming diagram. Detailed Implementation
[0029] The following detailed description illustrates the specific implementation method:
[0030] The reference numerals in the accompanying drawings of the instruction manual include: hydraulic press 1, main cylinder 2, center cylinder 3, forming slider 4, extrusion punch 5, concave-convex structure 6, upper forming template 7, upper forming pad 8, upper forming die 9, upper fixing ring 10, lower forming template 11, lower forming pad 12, forming die 13, lower forming die 14, ejector cylinder 15, ejector rod 16, limit head 17, punching cylinder 18, punching slider 19, punching punch 20, upper punching template 21, lower punching template 22, punching die 23, lower punching die 24, lower fixing ring 25, protrusion 26, pull rod 27, material plate 28, elastic element 29, guide rod 30, fixing block 31.
[0031] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0032] Example 1
[0033] As attached Figure 1-4 As shown: A flange forming and forging equipment includes a hydraulic press 1, a frame, and a forming die and a punching die mounted on the frame. The forming die is used for upsetting and extruding the parts, and the punching die is used for punching the extruded parts.
[0034] The forming mold includes a main cylinder 2, a central cylinder 3, a forming slider 4, an extrusion punch 5, an upper forming mold assembly, and a lower forming mold assembly. The main cylinder 2 is mounted on the frame, and the forming slider 4 is slidably connected to the frame. The piston rod of the main cylinder 2 drives the forming slider 4 and the central cylinder 3 to move. Specifically, the piston rod of the main cylinder 2 is fixed to the cylinder body of the central cylinder 3, and the forming slider 4 is fixed to the cylinder body of the central cylinder 3. The forming slider 4 and the cylinder body of the central cylinder 3 are fitted with a concave-convex structure 6. The forming slider 4 has a vertical first working hole; the piston rod of the central cylinder 3 is connected to the extrusion punch 5, and the piston rod of the central cylinder 3 and the extrusion punch 5 can move vertically within the first working hole.
[0035] The upper forming die assembly includes an upper forming template 7, an upper forming pad 8, and an upper forming die 9; the upper forming template 7 is mounted on the forming slider 4. The upper forming pad 8 and the upper forming template 7 are connected by bolts. The lower side of the upper forming pad 8 is provided with a first groove, and the upper side of the upper forming die 9 mates with the first groove. The lower outer periphery of the upper forming die 9 is provided with an annular groove, and an upper fixing ring 10 is fitted inside the annular groove. The upper fixing ring 10 is connected to the upper forming pad 8 by bolts. The upper forming template 7, the upper forming pad 8, and the upper forming die 9 are all provided with a second working hole for the extrusion punch 5 to pass through; the piston rod of the central cylinder 3 drives the extrusion punch 5 to move vertically to extrude holes in the upsetting part.
[0036] The forming lower die assembly includes a forming lower template 11, a forming lower backing plate 12, a forming cavity 13, and a forming lower die 14. The forming lower template 11 is mounted on a working backing plate on the machine frame. The upper side of the forming lower template 11 has a second groove that mates with the bottom of the forming lower backing plate 12, and the upper side of the forming lower backing plate 12 has a third groove that mates with the bottom of the forming cavity 13. The forming lower template 11 and the forming lower backing plate 12 are connected by bolts, and the forming lower backing plate 12 and the forming cavity 13 are also connected by bolts. The forming lower die 14 is located inside the forming cavity 13, and the two are fitted together through a stepped hole and a stepped structure. The forming cavity 13 is used to form the circumferential direction of the flange, and the forming lower die 14 is used to form the lower side of the flange.
[0037] The bottom of the frame is also equipped with an ejection mechanism, which includes an ejection cylinder 15 and an ejection rod 16. The ejection cylinder 15 is installed at the bottom of the frame. The frame, the lower forming template 11, and the lower forming pad 12 are all provided with sliding holes. The ejection rod 16 is vertically slidably connected in the sliding holes. The lower forming die 14 is provided with an ejection hole, and the ejection rod 16 can move vertically in the ejection hole. The ejection hole is a stepped hole with a larger upper part and a smaller lower part. The smaller hole of the stepped hole matches the size of the sliding hole. The upper end of the ejection rod 16 is provided with a limiting head 17. The limiting head 17 is slidably connected in the larger hole of the stepped hole. The limiting head 17 can be completely retracted into the larger hole of the stepped hole, and its upper end face is flush with the top of the punching die 24.
[0038] The punching die includes a punching cylinder 18, a punching slide 19, an upper punching die assembly, and a lower punching die assembly. The punching die is located on one side of the forming die, and the punching cylinder 18 is mounted on the frame. The punching slide 19 is connected to the piston rod of the punching cylinder 18. The upper punching die assembly includes a punching punch 20 and a punching upper template 21. The punching upper template 21 is mounted on the punching slide 19, and the punching punch 20 is mounted on the punching upper template 21. The punching die assembly includes a punching lower template 22, a punching die 23, and a punching lower die 24. The punching lower template 22 is mounted on the frame, and the punching die 23 and the punching lower die 24 are mounted on the punching lower template 22. The punching lower die 24 is located inside the punching die 23. Specifically, the punching die 23 has an annular groove that matches the punching lower die 24, and the punching lower die 24 is located inside the annular groove. The outer periphery of the punching die 23 has a connecting ring groove. A lower fixing ring 25 is fixed to the punching lower template 22 by bolts. The lower fixing ring 25 has an internal annular groove that matches the outer side of the punching die 23, and the upper side of the lower fixing ring 25 has a protrusion 26 that matches the connecting ring groove. The protrusion 26 is engaged in the connecting ring groove. The punching die 23 is used to position the flange circumferentially, and the punching die 24 is used to position the lower side of the flange. The punching die 24 is provided with a punching hole that is directly opposite the punching punch 20, and the punching punch 20 can move in the punching hole.
[0039] A tie rod 27 is vertically slidably connected inside the upper punching die 21. A material plate 28 is fixed to the lower side of the tie rod 27. An elastic element 29, specifically a spring, connects the material plate 28 to the upper punching die 21. The material plate 28 has a through hole for the punching punch 20 to pass through.
[0040] A guide rod 30 is connected to the punching slider 19, and a fixing block 31 is provided on the cylinder body of the punching cylinder 18. The fixing block 31 is provided with a guide hole, and the guide rod 30 is slidably connected in the guide hole.
[0041] Hydraulic press 1 is used to drive main cylinder 2, center cylinder 3, punching cylinder 18 and ejector cylinder 15.
[0042] Example 2
[0043] like Figure 4 As shown, a flange forming and forging process is performed using the flange forming and forging equipment of Embodiment 1, including the following steps:
[0044] Material feeding: Place the heated raw material into the lower forming mold 14 and the forming cavity 13.
[0045] Upsetting: In the initial state, the bottom of the extrusion punch 5 is flush with the bottom of the upper forming die 9. The hydraulic press 1 drives the piston rod of the main cylinder 2 to move, which in turn drives the forming slider 4 and the central cylinder 3 to move. The downward movement of the forming slider 4 causes the upper forming die assembly to move downward, thus pressing the upper forming die 9 downward. The piston rod of the central cylinder 3 drives the extrusion punch 5 to move downward synchronously. The upper forming die 9, the forming die 13, and the lower forming die 14 work together to achieve upsetting. After upsetting, the forming slider 4 returns slightly a distance.
[0046] Extrusion: The hydraulic press 1 drives the piston rod of the central cylinder 3 to move, and the piston rod of the central cylinder 3 drives the extrusion punch 5 to move downward a certain distance to achieve extrusion.
[0047] Punching: The hydraulic press 1 drives the piston rods of the main cylinder 2 and the center cylinder 3 to return to their original positions, transferring the punched flange blank to the punching lower die assembly. Specifically, the hydraulic press 1 activates the ejector cylinder 15, which drives the ejector rod 16 to move upward, thereby ejecting the flange blank upward. The hydraulic press 1 drives the piston rod of the punching cylinder 18 to move downward. The piston rod of the punching cylinder 18 drives the punching punch 20 downward through the punching slide 19. During this process, the material plate 28 will contact the surface of the flange blank. The punching slide 19 continues to move downward, the pull rod 27 will retract into the punching upper die plate 21, the elastic element 29 will be compressed, and the punching punch 20 punches the flange blank in the punching lower die assembly. After punching is completed, the hydraulic press 1 drives the punching cylinder 18 to return to its original position. The punching cylinder 18 drives the punching punch 20 to move upward through the punching slider 19. The pull rod 27 gradually emerges from the punching upper template 21, and the elastic element 29 gradually recovers. When the elastic element 29 is fully reset, it will drive the material plate 28 to move upward, and finally the punched flange is taken out.
[0048] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 process, method, article, or apparatus.
[0049] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.
Claims
1. A flange forming and forging equipment, characterized in that: It includes a hydraulic press, a frame, and a forming die and a punching die mounted on the frame. The forming die is used for upsetting and extruding parts, and the punching die is used for punching the extruded parts. The forming mold includes a main cylinder, a central cylinder, a forming slider, an extrusion punch, an upper forming mold assembly, and a lower forming mold assembly. The main cylinder is mounted on a frame, and the forming slider is slidably connected to the frame. The piston rod of the main cylinder drives the forming slider and the central cylinder to move. The forming slider has a vertical first working hole. The piston rod of the central cylinder is connected to the extrusion punch, and the piston rod of the central cylinder and the extrusion punch can move vertically within the first working hole. The upper forming mold assembly includes an upper forming template and an upper forming die. The lower forming mold assembly includes a lower forming template, a forming die, and a lower forming die assembly. A lower forming die; an upper forming die mounted on a forming slider; a lower forming die mounted on a frame; a lower forming die and a lower forming die mounted on the lower forming die; the lower forming die located inside the lower forming die; the lower forming die is used to form the circumferential direction of the flange; the lower forming die is used to form the lower side of the flange; both the upper forming die and the upper forming die are provided with a second working hole for the extrusion punch to pass through; the piston rod of the central cylinder drives the extrusion punch to move vertically to extrude holes in the upsetting part; The punching die includes a punching cylinder, a punching slide, an upper punching die assembly, and a lower punching die assembly. The punching die is located on one side of the forming die, and the punching cylinder is mounted on the frame. The punching slide is connected to the piston rod of the punching cylinder. The upper punching die assembly includes a punching punch and an upper punching template. The upper punching template is mounted on the punching slide, and the punching punch is mounted on the upper punching template. The lower punching die assembly includes a lower punching template, a punching die, and a lower punch. The lower punching template is mounted on the frame, and the punching die and lower punch are mounted on the lower punching template. The lower punch is located inside the punching die. The punching die is used to position the flange circumferentially, and the lower punch is used to position the lower side of the flange. The lower punch has a punching hole directly opposite the punching punch, and the punching punch can move within the punching hole. The hydraulic press is used to drive the main cylinder, the center cylinder, and the punching cylinder.
2. The flange forming and forging equipment according to claim 1, characterized in that: The bottom of the frame is also provided with an ejection mechanism, which includes an ejection cylinder and an ejection rod. The ejection cylinder is installed at the bottom of the frame. The frame and the lower forming mold are provided with sliding holes. The ejection rod is vertically slidably connected in the sliding holes. The lower forming mold is provided with an ejection hole, and the ejection rod can move vertically in the ejection hole.
3. The flange forming and forging equipment according to claim 2, characterized in that: The ejector hole is a stepped hole with a larger upper part and a smaller lower part. The smaller part of the stepped hole matches the size of the sliding hole. The upper end of the ejector rod is provided with a limiting head. The limiting head is slidably connected in the larger part of the stepped hole. The limiting head can be completely retracted into the larger part of the stepped hole and its upper end face is flush with the top of the punching die.
4. The flange forming and forging equipment according to claim 1, characterized in that: A pull rod is vertically slidably connected inside the upper punching template. A material plate is fixed to the lower side of the pull rod. An elastic element connects the material plate to the upper punching template. The material plate is provided with a through hole for the punching punch to pass through.
5. The flange forming and forging equipment according to claim 4, characterized in that: A guide rod is connected to the punching slide block, and a fixing block is provided on the cylinder body of the punching cylinder. The fixing block is provided with a guide hole, and the guide rod is slidably connected in the guide hole.
6. A flange forming and forging process, comprising forming using the flange forming and forging equipment as described in claim 1, characterized in that: Includes the following steps: Material preparation: Place the heated raw material into the lower forming mold and the lower forming mold; Upsetting: In the initial state, the bottom of the extrusion punch is flush with the bottom of the upper forming die. The hydraulic press drives the piston rod of the main cylinder to move, which in turn drives the forming slide and the central cylinder to move. The downward movement of the forming slide causes the upper forming die assembly to move downward, resulting in the upper forming die pressing downward. The piston rod of the central cylinder drives the extrusion punch to move downward synchronously. The upper forming die, the forming cavity die, and the lower forming die work together to achieve upsetting. Extrusion: The hydraulic press drives the piston rod of the central cylinder to move, and the piston rod of the central cylinder drives the extrusion punch to move downward a certain distance to achieve extrusion. Punching: The hydraulic press drives the piston rods of the main cylinder and the center cylinder to return to their original positions, transferring the punched flange blank to the punching die assembly; the hydraulic press drives the piston rod of the punching cylinder to move downwards, and the piston rod of the punching cylinder drives the punching punch downwards through the punching slide, and the punching punch punches the flange blank in the punching die assembly; after punching is completed, the hydraulic press drives the punching cylinder to return to its original position and removes the punched flange.