Hydraulic ejection device of intelligent pipe joint forging and pressing forming machine and ejection method of hydraulic ejection device

Abstract

The invention relates to the technical field of forging and pressing forming machine tools, in particular to a hydraulic ejection device of an intelligent pipe joint forging and pressing forming machine and an ejection method thereof.The hydraulic ejection device comprises a frame structure, an upper forging and pressing head and a lower forging and pressing head are arranged on the frame structure, and the lower forging and pressing head is formed by combining a third module and two fourth modules; the elastic supporting assembly is connected with the two fourth modules, and the elastic supporting assembly can enable the fourth modules and the third modules to be locked when the fourth modules and the third modules are attached or separated; the jacking piece penetrates through the third module and is arranged in a sliding mode, and a connecting shaft is installed on the jacking piece; and the driving assembly is in sliding sleeve fit with the connecting shaft, the driving assembly is matched with a staggered fit groove formed in the connecting shaft, and the driving assembly can trigger the elastic supporting assembly to act to enable the two fourth modules to move away from each other during action and then drive the jacking part to act, so that the forging and pressing quality is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of forging and pressing forming machine tools, and particularly to a hydraulic ejecting device and an ejecting method for an intelligent forging and pressing forming machine of pipe joints. Background Art

[0002] Metal pipe joints are key components of pipeline systems, used to connect different pipeline elements to ensure the continuity of the system. It prevents leakage of liquids or gases through seals to ensure tightness. Pipe joints can change the pipeline direction and adjust the pipe diameter to meet different flow or pressure requirements, thus playing an important role in industrial and civil pipeline systems.

[0003] In the production process of pipe joints, methods such as casting and forging can be used. The casting method requires melting the raw materials first, which requires a large amount of electric heating energy; while the forging method is relatively energy-saving, only requiring rolling the corresponding material plates into tubes and then cooperating with a forging press to eliminate the connecting gaps formed when the plates are bent into tubes.

[0004] Although heating is also required during the forging process, the heating degree is relatively low and the required electric heating energy is relatively small. However, after forging is completed, the formed pipe joints need to be removed from the forging press. In the prior art, although the mechanical grasping method can directly remove the pipe joints, after forging is completed, there is a large adhesion force between the pipe joints and the forging head, resulting in a large frictional force during separation. Only using mechanical grasping may cause deformation of the pipe joints, and in severe cases, the connection between the pipe joints and the forging head will crack due to the pulling force, affecting the processing quality. Summary of the Invention

[0005] The purpose of the present invention is to provide a hydraulic ejecting device and an ejecting method for an intelligent forging and pressing forming machine of pipe joints to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the present invention provides the following technical solutions: A hydraulic ejecting device for an intelligent forging and pressing forming machine of pipe joints, comprising: A frame structure, on which an upper forging head and a lower forging head are arranged, and the lower forging head is formed by combining a third module and two groups of fourth modules; An elastic support component, connecting the two groups of fourth modules, and the elastic support component can keep locked when the fourth module fits or separates from the third module; A jacking member, slidably arranged through the third module, and a connecting shaft is installed on the jacking member; A driving component, slidably sleeved with the connecting shaft, and the driving component cooperates with the misalignment groove arranged on the connecting shaft, and can first trigger the elastic support component to act to make the two groups of fourth modules move away from each other when operating, and then drive the jacking member to act.

[0007] As a further solution of the present invention: the upper forging head includes a first module and two groups of second modules, and the first module and the second modules are connected by a guiding structure, and the guiding structure can make the second modules move towards the first module when the second modules are attached to the fourth module.

[0008] As a further solution of the present invention: the guiding structure includes multiple groups of first inclined grooves symmetrically arranged on the first module and a connecting plate detachably connected to the second modules. One end of the connecting plate is provided with a key-shaped protrusion, and the key-shaped protrusion can slide in the first inclined grooves.

[0009] As a further solution of the present invention: the elastic support assembly includes a horizontal plate. One end of the horizontal plate is connected with an elastic structure, and the other end is connected with a contact wheel, and the contact wheel is in rolling fit with the driving assembly; Two groups of guiding grooves are symmetrically formed on the horizontal plate. A grooved wheel is installed on the connecting plate connecting the fourth module, and the grooved wheel can roll in the guiding grooves to drive the fourth module to move relative to the third module.

[0010] As a further solution of the present invention: the elastic structure includes a guiding shaft connected to the frame structure and a sliding connection part connected to the horizontal plate. The sliding connection part is slidably connected to the guiding shaft, and a cylindrical spring is also sleeved on the guiding shaft. One end of the cylindrical spring is connected to the end of the guiding shaft, and the other end is connected to the sliding connection part.

[0011] As a further solution of the present invention: the guiding grooves include second inclined grooves arranged on the horizontal plate, and straight grooves are arranged at both ends of the second inclined grooves; The length direction of the straight grooves is perpendicular to the movement direction of the fourth module.

[0012] As a further solution of the present invention: the misalignment groove includes a spiral groove arranged along the length direction of the connecting shaft and an arc groove arranged along the circumferential direction of the connecting shaft. When the driving assembly moves in the spiral groove, it can drive the connecting shaft to perform a lifting action. When the driving assembly moves in the arc groove, it can drive the connecting shaft to maintain a predetermined height.

[0013] As a further solution of the present invention: the driving assembly includes a driving motor fixedly installed on the frame structure. A rotating sleeve is connected to the output shaft of the driving motor. The rotating sleeve is slidably sleeved with the connecting shaft, and a convex shaft capable of sliding in the misalignment groove is arranged on the inner wall of the rotating sleeve; The driving assembly further includes a pushing member connected to the rotating sleeve, and the pushing member is in rolling fit with a contact wheel rotatably mounted on the horizontal plate.

[0014] An ejection method, applied to the hydraulic ejection device of the intelligent forging and forming machine for pipe joints, includes: During forging, the fourth module and the third module are in a fitting state, while the second module and the first module are in a separated state. At this time, the pipe fitting to be forged is placed on the third module and the fourth module. When the first module descends until the second module fits with the fourth module, the second module moves towards the first module to perform the forging action. After forging is completed, the first module and the second module move upward, and the second module moves away from the first module. Subsequently, the driving assembly acts and first drives the elastic support assembly to act, causing the fourth module to move away from the third module. Then, the driving assembly cooperates with the connecting shaft to make the jacking member move upward relative to the third module to jack up the forged pipe joint.

[0015] Compared with the prior art, the beneficial effects of the present invention are: By providing the separable first module, second module, third module, and fourth module, firstly, it can ensure full coverage of the pipe fitting before forging, ensuring the forging coverage in the initial stage; secondly, before demolding and ejection, the second module can be separated from the first module, and the fourth module can be separated from the third module. Thus, during the process of ejecting the pipe joint, it can avoid the phenomenon of deformation and cracking of the pipe joint during the ejection process due to excessive friction between the pipe joint and the first module, second module, third module, and fourth module, improving the forging quality. By providing the driving assembly, elastic support assembly, and misalignment grooves, when ejecting the pipe joint, the fourth module and the jacking member can act alternately in sequence. While avoiding damage to the pipe joint, it enables the components to act orderly, avoiding the decline of the forging process caused by disordered action sequence, and further improving the forging effect to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0017] Figure 2 It is a schematic structural diagram of another angle in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0018] Figure 3 It is a schematic structural diagram of the upper forging head in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0019] Figure 4It is an exploded view of the structure of the upper forging head in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0020] Figure 5 It is a schematic structural diagram of the lower forging head in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0021] Figure 6 It is a schematic structural diagram of the lower forging head from another angle in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0022] Figure 7 It is a schematic structural diagram of the third module, the lifting member and the driving assembly in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0023] Figure 8 It is Figure 7 an enlarged view of the structure at A in

[0024] Figure 9 It is a schematic partial structural diagram of the driving assembly in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0025] Figure 10 It is a schematic structural diagram of the elastic support assembly in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0026] Figure 11 It is an exploded view of the structure of the elastic support assembly in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0027] Figure 12 It is a schematic structural diagram of the horizontal plate in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0028] Figure 13 It is a schematic structural diagram of the upper forging head and the lower forging head in the pressed state in an embodiment of the hydraulic ejection device of the intelligent forging and forming machine for pipe joints.

[0029] In the figure: 1. Frame; 2. Hydraulic cylinder; 3. First module; 4. Second module; 5. Linking plate; 6. Key-shaped protrusion; 7. First inclined groove; 8. Bracket; 9. Driving motor; 10. Rotating sleeve; 1001. Convex shaft; 11. Connecting shaft; 1101. Spiral groove; 1102. Arc groove; 12. Thrust member; 13. Horizontal plate; 1301. Second inclined groove; 1302. Straight groove; 14. Contact wheel; 15. Sliding connection part; 16. Guide shaft; 17. Cylindrical spring; 18. Grooved pulley; 19. Connecting plate; 20. Lifting member; 2001. Arc surface; 21. Third module; 22. Fourth module. Detailed implementation manners

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0031] In addition, an element in the present invention is referred to as being "fixed to" or "disposed on" another element, which can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation manner.

[0032] Please refer to Figures 1 to 13 , in the embodiment of the present invention, a hydraulic ejecting device for an intelligent forging and forming machine of a pipe joint includes: a frame structure, an elastic support assembly, a jacking member 20 and a driving assembly.

[0033] The frame structure includes a frame 1 and a bracket 8. A hydraulic cylinder 2 is fixedly installed on the frame 1. The operating end of the hydraulic cylinder 2 is connected to an upper forging head. Further, the bracket 8 is also provided with a lower forging head. The lower forging head is formed by combining a third module 21 and two groups of fourth modules 22. Specifically, the upper forging head includes a first module 3 and two groups of second modules 4. The first module 3 and the second module 4 are connected by a guiding structure. The guiding structure can make the second module 4 move towards the first module 3 when the second module 4 is attached to the fourth module 22. The guiding structure includes a plurality of groups of first inclined grooves 7 symmetrically arranged on the first module 3 and a connecting plate 5 detachably connected to the second module 4. One end of the connecting plate 5 is provided with a key-shaped protrusion 6, and the key-shaped protrusion 6 can slide in the first inclined groove 7.

[0034] In the initial state, under the action of gravity, the key-shaped protrusion 6 is at the lower end of the first inclined groove 7 for the second module 4. At this time, the second module 4 and the first module 3 are in a misaligned state both longitudinally and laterally, so as to ensure that the two groups of second modules 4 are completely separated from the first module 3. This design makes the forging surface larger than the area in the state where the first module 3 and the second module 4 are attached, and can effectively cover the pipe fittings placed on the lower forging head, ensuring the forging coverage in the initial stage.

[0035] During the forging process, the hydraulic cylinder 2 drives the first module 3 and the second module 4 to move downward. At this time, the distance between the two second modules 4 is greater than the diameter of the pipe fitting to be forged, avoiding interference between the second module 4 and the pipe fitting. As the first module 3 and the second module 4 move downward, the pipe fitting is wrapped between the lower forging head and the first module 3 and the second module 4. When the second module 4 abuts against the lower forging head, its height remains constant, while the first module 3 continues to move downward. The cooperation between the key-shaped protrusion 6 and the first inclined groove 7 causes the second module 4 to move towards the first module 3 until they are completely fitted. This dynamic adjustment mechanism can achieve multi-stage forging of the pipe fitting, significantly improving the forging effect and forming quality.

[0036] Furthermore, after the forging is completed, the hydraulic cylinder 2 drives the first module 3 to move upward, while the second module 4 can maintain its original height due to gravity. Under the cooperation of the key-shaped protrusion 6 and the first inclined groove 7, the second module 4 moves away from the first module 3 and separates from the forged pipe joint. This separation method avoids excessive pulling of the pipe joint by the module, reducing the generation of surface scratches, cracks, and even deformation on the pipe joint, and significantly improving the quality of the forging process.

[0037] Please refer to Figures 10 to 12 , the elastic support assembly connects the two fourth modules 22. The elastic support assembly can keep the fourth module 22 locked when it fits or separates from the third module 21. It should be noted that the third module 21 and the fourth module 22 are connected by a sliding connection method. By controlling the action of the elastic support assembly, the two fourth modules 22 can move away from or close to each other relative to the third module 21. Among them, when the fourth module 22 fits with the third module 21, they form an arc forging surface. When the fourth module 22 separates from the third module 21, it can reduce the friction between the forged pipe joint and the lower forging head, making it more convenient to eject the pipe joint and avoiding deformation and cracking of the pipe joint during the ejection process.

[0038] The elastic support assembly includes a horizontal plate 13. One end of the horizontal plate 13 is connected with an elastic structure, and the other end is connected with a contact wheel 14. The contact wheel 14 is in rolling fit with the driving assembly. The elastic structure includes a guiding shaft 16 connected to the frame structure and a sliding connection part 15 connected to the horizontal plate 13. The sliding connection part 15 is slidably connected to the guiding shaft 16. A cylindrical spring 17 is also sleeved on the guiding shaft 16. One end of the cylindrical spring 17 is connected to the end of the guiding shaft 16, and the other end is connected to the sliding connection part 15; Two sets of guiding grooves are symmetrically formed on the horizontally arranged plate 13. A grooved pulley 18 is installed on the connecting plate 19 connecting the fourth module 22. The grooved pulley 18 can roll in the guiding grooves, driving the fourth module 22 to move relative to the third module 21. The guiding grooves include second inclined grooves 1301 provided on the horizontally arranged plate 13, and straight grooves 1302 are provided at both ends of the second inclined grooves 1301; The length direction of the straight groove 1302 is perpendicular to the movement direction of the fourth module 22.

[0039] In this embodiment, the grooved pulley 18 can roll in the second inclined grooves 1301 and the two sets of straight grooves 1302. When the grooved pulley 18 is in the upper straight groove 1302 (refer to Figure 12 ), the grooved pulley 18 separates the two sets of fourth modules 22 from the third module 21 through the connecting plate 19; and when the grooved pulley 18 is in the lower straight groove 1302, the grooved pulley 18 makes the two sets of fourth modules 22 fit against the third module 21 through the connecting plate 19. This design realizes the position switching of the fourth module 22, ensuring that a complete forging surface can be formed between the fourth module 22 and the third module 21 during the forging process, thereby improving the forging effect and the quality of the pipe joint.

[0040] After the forging is completed, the fourth module 22 is separated from the pipe joint by separating from the third module 21. This separation method avoids the phenomena such as deformation and cracking of the pipe joint during the ejection process due to the large frictional force between the pipe joint and the module, thereby significantly improving the surface quality and dimensional accuracy of the pipe joint.

[0041] In addition, the length direction of the straight groove 1302 is perpendicular to the movement direction of the fourth module 22. When the grooved pulley 18 is in the straight groove 1302, it can lock the position of the fourth module 22, which ensures that during the forging process, when the fourth module 22 fits against the third module 21, the extrusion of the pipe fitting to be forged will not cause the fourth module 22 to displace away from the third module 21, further improving the dimensional accuracy and quality of the pipe joint after forging.

[0042] By providing the separable first module 3, second module 4, third module 21, and fourth module 22, firstly, it can ensure full coverage of the pipe fitting before forging, ensuring the forging coverage in the initial stage; secondly, before demolding and ejection, the second module 4 can be separated from the first module 3, and the fourth module 22 can be separated from the third module 21, so that during the process of ejecting the pipe joint, the phenomena of deformation and cracking of the pipe joint during the ejection process due to excessive frictional force between the pipe joint and the first module 3, second module 4, third module 21, and fourth module 22 can be avoided, improving the forging quality.

[0043] Please refer to Figures 7 to 10, the lifting member 20 is slidably disposed through the third module 21. A connecting shaft 11 is installed on the lifting member 20. An arc surface 2001 is provided at the upper end of the lifting member 20, and the arc surface 2001 has the same circumferential radius as the inner cross-section of the third module 21; The driving assembly is slidably sleeved with the connecting shaft 11 and cooperates with a misalignment groove provided on the connecting shaft 11. When operating, it can first trigger the elastic support assembly to act so that the two fourth modules 22 move away from each other, and then drive the lifting member 20 to act; The misalignment groove includes a spiral groove 1101 provided along the length direction of the connecting shaft 11 and an arc groove 1102 provided along the circumferential direction of the connecting shaft 11. When the driving assembly moves in the spiral groove 1101, it can drive the connecting shaft 11 to perform a lifting action. When the driving assembly moves in the arc groove 1102, it can drive the connecting shaft 11 to maintain a predetermined height; The driving assembly includes a driving motor 9 fixedly installed on the frame structure. A rotating sleeve 10 is connected to the output shaft of the driving motor 9. The rotating sleeve 10 is slidably sleeved with the connecting shaft 11, and a convex shaft 1001 that can slide in the misalignment groove is provided on the inner wall of the rotating sleeve 10.

[0044] During use, by controlling the driving motor 9 to work, the connected rotating sleeve 10 rotates accordingly, driving the convex shaft 1001 to perform a circular motion. When the convex shaft 1001 moves in the spiral groove 1101, it can drive the lifting member 20 to move in the vertical direction; and when the convex shaft 1001 enters the arc groove 1102 to move, the height of the lifting member 20 remains constant. At this time, the arc surface 2001 and the inner side of the third module 21 are coplanar, forming a complete forging surface, thereby avoiding the appearance of protruding or concave parts on the surface of the pipe joint after forging, and significantly improving the forging quality.

[0045] Further, when the convex shaft 1001 rotates from the arc groove 1102 to the spiral groove 1101, the lifting member 20 can move in the vertical direction to lift the pipe joint completed forging on the third module 21. This design can facilitate manual or mechanical picking, improving production efficiency and safety.

[0046] Through the above settings, the movement accuracy of the lifting member 20 is significantly improved. The cooperation between the rotating sleeve 10 and the convex shaft 1001 ensures the stability of the equipment operation, reduces jitter and errors. At the same time, the coplanar design of the arc surface 2001 and the inner side of the third module 21 not only avoids the uneven phenomenon on the surface of the pipe joint, but also significantly improves the surface quality and dimensional accuracy of the pipe joint; in addition, the automatic lifting function facilitates manual or mechanical picking, reduces production costs, and improves the overall production efficiency.

[0047] The driving assembly further includes a pushing member 12 connected to the rotating sleeve 10, and the pushing member 12 is in rolling fit with a contact wheel 14 rotatably mounted on the horizontal plate 13.

[0048] When the convex shaft 1001 rotates into the arc-shaped groove 1102, the arc surface 2001 is coplanar with the inner side of the third module 21. As the convex shaft 1001 continues to rotate in the arc-shaped groove 1102, the pushing member 12 contacts the contact wheel 14, pushing the horizontal plate 13 towards the cylindrical spring 17, compressing the cylindrical spring 17. At the same time, under the action of force, the grooved wheel 18 switches from one straight groove 1302 to another straight groove 1302 through the second inclined groove 1301, so that the fourth module 22 fits with the third module 21 and maintains a locked state, ensuring the close cooperation between the two during the forging process and improving the forging quality.

[0049] After forging is completed, the driving motor 9 drives the rotating sleeve 10 to rotate in the reverse direction, and the pushing member 12 gradually separates from the contact wheel 14. The cylindrical spring 17 releases elastic potential energy, pushing the horizontal plate 13 to move in the reverse direction, making the fourth module 22 move away from the pipe joint, avoiding deformation or cracking of the pipe joint due to excessive friction during the separation process. At the same time, the convex shaft 1001 moves in the arc-shaped groove 1102, keeping the height of the lifting member 20 constant. After the pushing member 12 is completely separated from the contact wheel 14, as the rotating sleeve 10 continues to rotate, the convex shaft 1001 switches to the spiral groove 1101, and the lifting member 20 starts to move upward, smoothly lifting the forged pipe joint, realizing the automatic ejection of the pipe joint, facilitating manual or mechanical picking, and improving production efficiency and automation.

[0050] This design realizes high precision, high efficiency and high quality during the forging process by controlling the movement and switching of each component. During the forging process, the close cooperation of each component ensures the forming effect of the pipe joint; after forging is completed, the automatic ejection and separation mechanism effectively avoids damage to the pipe joint, and at the same time enables the components to act orderly, improving production efficiency, reducing labor costs, and ensuring the surface quality and dimensional accuracy of the product.

[0051] As an embodiment of the present invention, a method for ejecting is also proposed, which is applied to the hydraulic ejecting device of the intelligent forging and forming machine for pipe joints, and includes: During forging, the fourth module 22 and the third module 21 are in a fitting state, while the second module 4 and the first module 3 are in a separated state. At this time, the pipe fitting to be forged is placed on the third module 21 and the fourth module 22. When the first module 3 descends until the second module 4 fits with the fourth module 22, the second module 4 moves towards the first module 3 to perform the forging action; After the forging is completed, the first module 3 and the second module 4 move upward, and the second module 4 moves away from the first module 3. Subsequently, the driving assembly operates, first driving the elastic support assembly to operate, causing the fourth module 22 to move away from the third module 21. Then, the driving assembly cooperates with the connecting shaft 11 to make the jacking member 20 move upward relative to the third module 21, jacking up the forged pipe joint.

[0052] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0053] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative manner of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A hydraulic ejector device for an intelligent forging machine for a pipe joint, characterized in that: include: A frame structure, wherein an upper forging head and a lower forging head are arranged on the frame structure, and the lower forging head is formed by combining a third die set and two sets of fourth die sets; An elastic support component, connecting the two groups of the fourth modules, the elastic support component can keep the fourth module locked when being attached to or separated from the third module; A lifting member is slidably arranged through the third module, and a connecting shaft is installed on the lifting member; The driving component is slidably fitted with the connecting shaft, and the driving component cooperates with the interlocking groove arranged on the connecting shaft. When in action, it can first trigger the action of the elastic support component to make the two groups of the fourth modules move away from each other, and then drive the lifting member to act.

2. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 1 is characterized in that: The upper forging head includes a first die set and two groups of second die sets. The first die set is connected to the second die set via a guide structure. The guide structure can make the second die set move toward the first die set when the second die set is attached to the fourth die set.

3. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 2 is characterized in that: The guide structure includes a plurality of first inclined grooves symmetrically arranged on the first module and a connecting plate detachably connected to the second module, one end of the connecting plate is provided with a key-shaped protrusion, and the key-shaped protrusion can slide in the first inclined groove.

4. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 1 is characterized in that: The elastic support assembly comprises a transverse plate, one end of which is connected to an elastic structure, and the other end of which is connected to an abutment wheel, and the abutment wheel is rollingly adapted to the driving assembly; Two groups of guide grooves are symmetrically formed on the transverse plate, and a groove wheel is installed on the connecting plate connected to the fourth module. The groove wheel can roll in the guide groove to drive the fourth module to move relative to the third module.

5. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 4 is characterized in that: The elastic structure includes a guide shaft connected to the frame structure and a sliding connection part connected to the transverse plate. The sliding connection part is slidably connected to the guide shaft. A cylindrical spring is also sleeved on the guide shaft. One end of the cylindrical spring is connected to the end of the guide shaft, and the other end is connected to the sliding connection part.

6. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 4 is characterized in that: The guide groove comprises a second inclined groove arranged on the transverse plate, and both ends of the second inclined groove are provided with straight grooves; The length direction of the straight groove is perpendicular to the moving direction of the fourth module.

7. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 4 is characterized in that: The interlocking groove includes a spiral groove arranged along the length direction of the connecting shaft and an arc groove arranged along the circumferential direction of the connecting shaft. When the driving component moves in the spiral groove, it can drive the connecting shaft to perform a lifting action. When the driving component moves in the arc groove, it can drive the connecting shaft to maintain a predetermined height.

8. The hydraulic ejector device of the intelligent forging machine for pipe joints according to claim 4 is characterized in that: The driving assembly comprises a driving motor fixedly mounted on the frame structure, a rotating sleeve is connected to the output shaft of the driving motor, the rotating sleeve is slidably engaged with the connecting shaft, and a convex shaft capable of sliding in the staggered groove is arranged on the inner wall of the rotating sleeve; The driving assembly further comprises a pushing member connected to the rotating sleeve, and the pushing member is rollingly adapted to an abutment wheel rotatably mounted on the transverse plate.

9. An ejection method, applied to the hydraulic ejection device of the intelligent forging machine for pipe joints as claimed in any one of claims 1 to 8, characterized in that: include: During forging, the fourth die set is in a fitted state with the third die set, while the second die set is in a separated state with the first die set. At this time, the pipe to be forged is placed on the third die set and the fourth die set. When the first die set descends until the second die set is fitted with the fourth die set, the second die set moves toward the first die set to perform the forging action. After forging is completed, the first die set and the second die set move upward, and the second die set moves away from the first die set. Then the driving component moves and first drives the elastic support component to move, so that the fourth die set moves away from the third die set. Then the driving component cooperates with the connecting shaft to make the lifting part move upward relative to the third die set to lift the forged pipe joint.

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