Vacuum isothermal forging and pressing device

By designing a quick-change mechanism and an auxiliary forging mechanism, the problems of low locking efficiency and forging displacement in vacuum isothermal forging are solved, achieving efficient clamping and precise positioning, and improving the accuracy of forgings and the versatility of the equipment.

CN121820516APending Publication Date: 2026-04-10HEFEI METALFORMING MACHINE TOOL
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-03
Publication Date
2026-04-10

AI Technical Summary

Technical Problem

In existing vacuum isothermal forging equipment, the method of locking and fixing with bolts and nuts is inefficient and labor-intensive. Furthermore, the forgings are prone to displacement due to impact during the forging process, which affects the accuracy and quality of the forgings.

Method used

The system employs a quick-change mechanism and an auxiliary forging mechanism. A threaded rod drives a cylindrical clamping device to hold the upper mold, wedge blocks provide reinforcement and fixation, and a reciprocating screw drives an arc-shaped block to clamp the forging, ensuring stable positioning.

Benefits of technology

It improves locking and disassembly efficiency, reduces the need for manual operation, ensures accurate positioning of forgings in the mold, improves the dimensional and shape accuracy of forgings, and reduces production costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The vacuum isothermal forging and pressing device comprises a device body, a supporting block is arranged in the device body, an air cylinder is slidably connected to the center of the interior of the supporting block, a quick replacement mechanism is arranged at the bottom end of the air cylinder, and an auxiliary forging and pressing mechanism is arranged on the bottom face of the inner wall of the device body. According to the quick replacement mechanism, a first cylinder can be driven to move through rotation of a threaded rod, then a first auxiliary plate is driven to slide in a sliding groove formed in a cross-shaped rotating block, and a second cylinder is clamped through a third auxiliary plate, so that an upper mold is fixed, quick disassembly is achieved, and the practicability is high. The auxiliary forging and pressing mechanism drives a first sliding block and a second sliding block to move oppositely through rotation of a reciprocating lead screw, then a first arc-shaped block and a second arc-shaped block clamp an object needing vacuum isothermal forging and pressing, the position of a forge piece in a die can be fixed through clamping, the forge piece is prevented from moving or rotating in the forging process, and the forging quality is improved. This contributes to ensuring that the forge piece can accurately fill the mold cavity.
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Description

Technical Field

[0001] This invention relates to the field of elevator circuit fault detection, specifically a vacuum isothermal forging device. Background Technology

[0002] Vacuum isothermal forging is mainly used in low-speed superplastic forming processes, which can significantly reduce surface defects such as oxidation and corrosion of materials and facilitate gas release. It is an important forming process for special alloys such as high-temperature alloys, titanium alloys, and aluminum-magnesium alloys, and is widely used in the defense industry and aerospace field. Currently, Japan's AIDA Engineering and Germany's Schuler Group are in a leading position in vacuum isothermal forging, but their high-performance products have been subject to export restrictions to my country. In recent years, my country's energy, military, and transportation industries have developed rapidly, especially with the rise of my country's large aircraft manufacturing industry, which has led to a rapid increase in demand for blades, casings, and load-bearing structural components. Therefore, the development of high-performance vacuum isothermal forging equipment is necessary and urgent. From the perspective of the domestic market, there are many forging machine tool enterprises in my country, and the competition is relatively fierce. Most enterprises mainly produce forging equipment for ordinary carbon steel, alloy steel, and stainless steel materials. Their overall processing capabilities for special alloy materials such as high-temperature alloys, titanium alloys, and aluminum-magnesium alloys are insufficient, their product technology content and added value are relatively low, and their process level is relatively backward. Forging and pressing machine tool enterprises such as Jinan No. 2 Machine Tool Plant and Hefei Forging & Pressing Intelligent Equipment Co., Ltd. dominate the industry, with some basic indicators reaching the international advanced level, but some key technical indicators need further breakthroughs. Anhui Province's forging and pressing machine tool industry started early and developed rapidly, and has formed a certain scale, occupying an important position in the equipment manufacturing industry. It is mainly concentrated in Hefei, Wuhu, Ma'anshan and other regions, and is dominated by private enterprises.

[0003] In recent years, the technological level of the forging and pressing machine tool industry in Anhui Province has been continuously improving, promoting intelligent and green development, and catching up with international advanced levels. As an industry leader, Hefei Forging & Pressing Intelligent Equipment Co., Ltd. has developed and manufactured a 100MN precision CNC isothermal forging hydraulic press to meet the needs of the national defense industry and the national large aircraft manufacturing. Many of the machine's technical parameters lead the domestic industry and have reached international advanced levels. The successful development of this product has changed the current backward isothermal forging equipment in my country, improved the warm forging pressing process, and provided advanced production and processing equipment for my country's forging process, which is of great significance to my country's forging industry.

[0004] Vacuum isothermal forging is a process where forgings are forged under vacuum conditions. Because the press and forging system are in a sealed vacuum environment, the connection between the die and the equipment cannot be manually operated, especially between the upper die holder and the pressure head. Bolting and nut work is difficult at height, and the limited operating space makes it challenging, resulting in low efficiency and a heavy workload for workers. In existing technologies, locking the die to the equipment often requires manual operation using bolts and nuts, which is inefficient and labor-intensive. Furthermore, during vacuum isothermal forging, the forged object is not clamped. During forging, the unclamped forging can shift due to the impact of the forging force, preventing it from being accurately placed in the die. This not only affects the shape and dimensional accuracy of the forging but also causes problems with the fit between the forging and the die, ultimately impacting the quality and performance of the forging.

[0005] Therefore, a vacuum isothermal forging device was proposed to solve the above problems. Summary of the Invention

[0006] In view of this, the technical problem to be solved by the present invention is to provide a vacuum isothermal forging device to solve the problems of the prior art which uses bolts and nuts for locking and fixing, which is inefficient and labor-intensive, and the problem that the unclamped forgings will be displaced due to the impact of the forging force during the forging process, resulting in the forgings not being able to be accurately placed in the correct position of the mold.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a vacuum isothermal forging device, comprising: a device body, a support block disposed inside the device body, a cylinder slidably connected at the center of the support block, a quick-change mechanism disposed at the bottom end of the cylinder, and an auxiliary forging mechanism disposed on the bottom surface of the inner wall of the device body.

[0008] As an improvement, the quick-change mechanism includes a cross-shaped rotating block, which is fixedly connected to the bottom surface of the cylinder, and each of the four ends of the cross-shaped rotating block is provided with a sliding groove. An auxiliary cylinder is fixedly connected to the center of the cross-shaped rotating block, and a threaded rod is internally threaded to the end of the auxiliary cylinder away from the cross-shaped rotating block.

[0009] As an improvement, a first cylinder is rotatably connected to the outer surface of the threaded rod, and the first cylinder can move together with the threaded rod. A second auxiliary plate is fixedly connected to the outer surface of the first cylinder. A connecting rod is rotatably connected to the side of the second auxiliary plate. The end of the connecting rod away from the second auxiliary plate is rotatably connected to the first auxiliary plate, and the first auxiliary plate is slidably connected inside the groove opened in the cross-shaped rotating block.

[0010] As an improvement, a third auxiliary plate is fixedly connected to the side of the first auxiliary plate away from the connecting rod. The side of the third auxiliary plate away from the first auxiliary plate is provided with several wedge-shaped blocks. The quick-change mechanism also includes a second cylinder, which encloses the third auxiliary plate. The inner wall of the second cylinder is provided with a threaded groove, and the bottom end of the second cylinder is fixedly connected to an upper mold.

[0011] As an improvement, the auxiliary forging mechanism includes a base, and the base is fixedly connected to the bottom surface of the inner wall of the device body. A first slider and a second slider are slidably connected to the inner wall of the base. A first arc-shaped block is rotatably connected to the opposite side of the first slider and the second slider. A second arc-shaped block is rotatably connected to the side of the first arc-shaped block away from the first slider.

[0012] As an improvement, an airbag is provided inside the second arc-shaped block, a flexible plate is fixedly connected inside the second arc-shaped block, a touch plate is fixedly connected to the bottom surface of the inner wall of the second arc-shaped block, and the touch plate is located on both sides of the flexible plate. An inflation device is fixedly connected to the bottom surface of the second arc-shaped block, and the inflation device is located inside the second arc-shaped block.

[0013] As an improvement, a reciprocating screw is rotatably connected to the side of the base, and the first slider and the second slider are threadedly connected to the outer surface of the reciprocating screw. The two ends of the reciprocating screw are provided with threads in opposite directions. An auxiliary block is fixedly connected to the end of the first slider away from the reciprocating screw, and a telescopic rod is provided inside the auxiliary block. A gear is rotatably connected to the end of the telescopic rod away from the auxiliary block.

[0014] As an improvement, a roller is fixedly connected to the end of the gear away from the auxiliary block, a rack is fixedly connected to the side of the base near the auxiliary block, and the rack meshes with the gear. A storage box is fixedly connected to the end of the base away from the first slider, and the storage box has a notch that is adapted to the size of the roller.

[0015] Compared with the prior art, the present invention provides a vacuum isothermal forging device, which has the following beneficial effects: 1. The rotation of the threaded rod can drive the first cylinder to move, which in turn drives the first auxiliary plate to slide in the groove opened by the cross-shaped rotating block. The second cylinder is clamped by the third auxiliary plate, thereby fixing the upper mold and achieving quick disassembly. Compared with the existing technology that uses bolts and nuts for locking, the quick clamping and disassembly design reduces the process of tightening and loosening bolts and nuts, thus saving time and improving work efficiency. Tightening bolts and nuts requires precise control of the tightening force to avoid problems caused by over-tightening or over-loosening. This design can achieve clamping with simple rotation, reducing the skill requirements of the operator.

[0016] 2. The wedge block is engaged with the threaded groove inside the second cylinder. When the second cylinder is expanded and clamped outward by the third auxiliary plate, the wedge block can be stuck inside the threaded groove, making it less likely to loosen or fall off due to external vibration or impact. This stability is crucial to ensuring the normal operation of the upper mold. By clamping the wedge block tightly in the threaded groove, the connection can be further strengthened, which is especially important for applications that bear large loads or stresses.

[0017] 3. The rotation of the reciprocating screw drives the first and second sliders to move towards each other, thereby clamping the object to be vacuum isothermal forged by the first and second arc blocks. Clamping can fix the position of the forging in the mold and prevent it from shifting or rotating during the forging process. This helps to ensure that the forging can accurately fill the mold cavity, thus obtaining a forging with the required shape and size. Moreover, by keeping the position of the forging stable by clamping, the forging error caused by the movement of the forging can be reduced. This helps to improve the dimensional and shape accuracy of the forging and meet more stringent manufacturing requirements. In addition, the first and second arc blocks can be adjusted according to the shape of the clamped object to adapt to objects of different shapes. This greatly improves the versatility and flexibility of the equipment and reduces production costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional side view of the overall structure of the present invention; Figure 2 This is a schematic diagram of the connection structure of the cross-shaped rotating blocks of the present invention; Figure 3 This is a schematic diagram of the internal structure of the second cylinder of the present invention; Figure 4 This is a schematic diagram of the internal structure of the first cylinder of the present invention; Figure 5 This is a schematic diagram of the auxiliary forging mechanism of the present invention; Figure 6 This is a schematic diagram of the reciprocating lead screw connection structure of the present invention; Figure 7 This is a schematic diagram of the auxiliary block connection structure of the present invention; Figure 8 This is a schematic diagram of the internal structure of the first arc-shaped block of the present invention.

[0019] In the picture: 1. Device body; 11. Support block; 12. Cylinder; 2. Quick-change mechanism; 21. Cross-shaped rotating block; 22. Auxiliary cylinder; 23. First auxiliary plate; 24. Connecting rod; 25. Second auxiliary plate; 26. First cylinder; 27. Threaded rod; 28. Wedge block; 29. ​​Second cylinder; 210. Third auxiliary plate; 211. Upper mold; 3. Auxiliary forging mechanism; 31. Base; 32. First slider; 33. First arc block; 34. Second arc block; 35. Airbag; 36. Soft plate; 37. Contact plate; 38. Inflation device; 39. Second slider; 310. Storage box; 311. Reciprocating screw; 312. Auxiliary block; 313. Gear; 314. Rack; 315. Roller. Detailed Implementation

[0020] 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.

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0022] Example Please refer to Figures 1 to 4 As shown: To address the problems mentioned in the technical solutions, this application provides a vacuum isothermal forging device, comprising: a device body 1, a support block 11 disposed inside the device body 1, a cylinder 12 slidably connected at the center of the support block 11, a quick-change mechanism 2 disposed at the bottom end of the cylinder 12, and an auxiliary forging mechanism 3 disposed on the bottom surface of the inner wall of the device body 1.

[0023] The quick-change mechanism 2 includes a cross-shaped rotating block 21, which is fixedly connected to the bottom surface of the cylinder 12. The four ends of the cross-shaped rotating block 21 are provided with sliding grooves. An auxiliary cylinder 22 is fixedly connected to the center of the cross-shaped rotating block 21. A threaded rod 27 is internally threaded at the end of the auxiliary cylinder 22 away from the cross-shaped rotating block 21.

[0024] The outer surface of the threaded rod 27 is rotatably connected to the first cylinder 26, and the first cylinder 26 can move together with the threaded rod 27. The outer surface of the first cylinder 26 is fixedly connected to the second auxiliary plate 25. The side of the second auxiliary plate 25 is rotatably connected to the connecting rod 24. The end of the connecting rod 24 away from the second auxiliary plate 25 is rotatably connected to the first auxiliary plate 23, and the first auxiliary plate 23 is slidably connected inside the groove opened in the cross-shaped rotating block 21.

[0025] A third auxiliary plate 210 is fixedly connected to the side of the first auxiliary plate 23 away from the connecting rod 24. Several wedge blocks 28 are provided on the side of the third auxiliary plate 210 away from the first auxiliary plate 23. The quick-change mechanism 2 also includes a second cylinder 29, which encloses the third auxiliary plate 210. The inner wall of the second cylinder 29 is provided with a threaded groove. An upper mold 211 is fixedly connected to the bottom end of the second cylinder 29.

[0026] Among them, the four ends of the cross-shaped rotating block 21 are provided with sliding grooves, and the inner wall of the second cylinder 29 is provided with threaded grooves, which are adapted to the wedge block 28 so that the wedge block 28 can be stuck inside the threaded groove.

[0027] Compared with the prior art, in this embodiment, the rotation of the threaded rod 27 can drive the first cylinder 26 to move, thereby causing the first auxiliary plate 23 to slide in the groove opened in the cross-shaped rotating block 21, and the second cylinder 29 is clamped by the third auxiliary plate 210, thereby fixing the upper mold 211 and achieving quick disassembly. Compared with the operation of locking and fixing with bolts and nuts in the prior art, the quick clamping and disassembly design reduces the process of tightening and loosening bolts and nuts, thereby saving time and improving work efficiency. Tightening bolts and nuts requires precise control of the tightening force to avoid problems caused by overtightening or loosening, while this design can achieve clamping with simple rotation, reducing the skill requirements of the operator.

[0028] A further embodiment: Please refer to Figures 5 to 8 As shown: The auxiliary forging mechanism 3 includes a base 31, which is fixedly connected to the bottom of the inner wall of the device body 1. The inner wall of the base 31 is slidably connected to a first slider 32 and a second slider 39. The opposite sides of the first slider 32 and the second slider 39 are rotatably connected to a first arc block 33. The side of the first arc block 33 away from the first slider 32 is rotatably connected to a second arc block 34.

[0029] An airbag 35 is provided inside the second arc-shaped block 34. A flexible plate 36 is fixedly connected inside the second arc-shaped block 34. A touch plate 37 is fixedly connected to the bottom surface of the inner wall of the second arc-shaped block 34, and the touch plate 37 is located on both sides of the flexible plate 36. An inflation device 38 is fixedly connected to the bottom surface of the second arc-shaped block 34, and the inflation device 38 is located inside the second arc-shaped block 34.

[0030] A reciprocating screw 311 is rotatably connected to the side of the base 31, and the first slider 32 and the second slider 39 are threadedly connected to the outer surface of the reciprocating screw 311. The two ends of the reciprocating screw 311 are provided with threads in opposite directions. An auxiliary block 312 is fixedly connected to the end of the first slider 32 away from the reciprocating screw 311, and a telescopic rod is provided inside the auxiliary block 312. A gear 313 is rotatably connected to the end of the telescopic rod away from the auxiliary block 312.

[0031] A roller 315 is fixedly connected to the end of the gear 313 away from the auxiliary block 312. A rack 314 is fixedly connected to the side of the base 31 near the auxiliary block 312, and the rack 314 meshes with the gear 313. A storage box 310 is fixedly connected to the end of the base 31 away from the first slider 32, and the storage box 310 has a notch that is adapted to the size of the roller 315.

[0032] Among them: the second arc-shaped block 34 is provided with a wave-shaped groove on the side away from the first arc-shaped block 33; the two ends of the reciprocating screw 311 are provided with threads in opposite directions; the auxiliary block 312 is provided with a telescopic rod inside; the storage box 310 has a notch and is adapted to the size of the roller 315; the soft plate 36 is made of elastic material; the touch plate 37 is electrically connected to the inflation device 38 and can control the air intake of the inflation device 38.

[0033] Compared with the prior art, in this embodiment, the rotation of the reciprocating screw 311 drives the first slider 32 and the second slider 39 to move towards each other, thereby causing the first arc-shaped block 33 and the second arc-shaped block 34 to clamp the object to be vacuum isothermal forged. Clamping can fix the position of the forging in the mold and prevent it from shifting or rotating during the forging process. This helps to ensure that the forging can accurately fill the mold cavity, thereby obtaining a forging with the required shape and size. Moreover, by keeping the position of the forging stable by clamping, the forging error caused by the movement of the forging can be reduced. This helps to improve the dimensional accuracy and shape accuracy of the forging and meet more stringent manufacturing requirements. In addition, the first arc-shaped block 33 and the second arc-shaped block 34 can be adjusted according to the shape of the clamped object to adapt to objects of different shapes. This greatly improves the versatility and flexibility of the equipment and reduces production costs.

[0034] The working principle of all the content in the above embodiments is as follows: The following is the working process of the quick change mechanism 2 for quickly changing the upper mold 211: When connecting the mold to the equipment, the threaded rod 27 is manually driven to rotate. Since the threaded rod 27 is threaded inside the auxiliary cylinder 22, when the threaded rod 27 rotates, it can drive the first cylinder 26 connected to it to move towards the cross-shaped rotating block 21, thereby driving the second auxiliary plate 25 to move towards the cross-shaped rotating block 21 as well, and driving the connecting rod 24 connected to it to rotate. The rotation of the connecting rod 24 drives the first auxiliary plate 23 connected to it to rotate, and causes the first auxiliary plate 23 to slide in the groove opened in the cross-shaped rotating block 21, and drives the third auxiliary plate 210 and the wedge block 28 to expand outward, thereby fixing the upper mold 211 and achieving quick disassembly. Compared with the operation of locking and fixing with bolts and nuts in the prior art, the quick clamping and disassembly design reduces the process of tightening and loosening bolts and nuts, thereby saving time and improving work efficiency. Tightening bolts and nuts requires precise control of the tightening force to avoid problems caused by over-tightening or over-loosening, while this design can achieve clamping with simple rotation, reducing the skill requirements of the operator. Since the inner wall of the second cylinder 29 has a threaded groove that is compatible with the wedge block 28, the wedge block 28 can be locked inside the threaded groove, making it less likely to loosen or fall off due to external vibration or impact. This stability is crucial for ensuring the normal operation of the upper mold 211. By clamping the wedge block 28 tightly in the threaded groove, the strength of the connection can be further enhanced, which is especially important for applications that bear large loads or stresses.

[0035] Please refer to the above work process. Figures 1 to 4 .

[0036] The following describes the working process of auxiliary forging mechanism 3 in maintaining vacuum isothermal forging of the object: In use, as described above, the upper mold 211 is connected to the equipment. The object to be forged is then placed on the bottom inner wall of the base 31. The reciprocating screw 311 is then driven to rotate. Since the two ends of the reciprocating screw 311 are provided with threads in opposite directions, the first slider 32 and the second slider 39 are driven to move in opposite directions. This drives the first arc block 33 and the second arc block 34 to clamp the object, which can fix the position of the forging in the mold and prevent it from shifting or rotating during the forging process. This helps to ensure that the forging can accurately fill the mold cavity, thereby obtaining a forging with the required shape and size. Moreover, by keeping the position of the forging stable through clamping, the forging error caused by the movement of the forging can be reduced. This helps to improve the dimensional accuracy and shape accuracy of the forging and meet more stringent manufacturing requirements. In addition, the first arc block 33 and the second arc block 34 can be adjusted according to the shape of the clamped object to adapt to objects of different shapes. This greatly improves the versatility and flexibility of the equipment and reduces production costs.

[0037] Because the second arc-shaped block 34 is made of a flexible and high-temperature resistant material, it will deform during clamping. The soft plate 36 is made of an elastic material, and the contact plate 37 is electrically connected to the inflation device 38, which can control the air intake of the inflation device 38. Thus, the clamping force can be precisely controlled by adjusting the inflation amount according to the shape, size and material of the object to be forged. This flexibility ensures that the clamping is both stable and does not cause unnecessary damage to the object. The clamping force of the inflatable clamp is evenly distributed, which helps to avoid local deformation or damage to the object to be forged during the clamping process. The uniform clamping force can also ensure that the object remains stable during the forging process and improve the processing accuracy. In addition, the auxiliary block 312 is equipped with a telescopic rod inside, and the storage box 310 has a notch that is adapted to the size of the roller 315. When the first slider 32 moves, the gear 313 will rotate, thereby driving the roller 315 to rotate, thereby cleaning the table surface of the base 31. The telescopic rod is provided so that the roller 315 is located inside the storage box 310, which will not affect the use of the equipment and keep the work surface clean.

[0038] Please refer to the above work process. Figures 5 to 8 .

[0039] 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.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A vacuum isothermal forging apparatus, comprising: The device body (1) has a support block (11) inside, and a cylinder (12) is slidably connected at the center of the support block (11). The device body (12) is characterized in that a quick replacement mechanism (2) is provided at the bottom end of the cylinder (12), and an auxiliary forging mechanism (3) is provided on the bottom surface of the inner wall of the device body (1).

2. The vacuum isothermal forging apparatus according to claim 1, characterized in that: The quick-change mechanism (2) includes a cross-shaped rotating block (21), which is fixedly connected to the bottom surface of the cylinder (12). The four ends of the cross-shaped rotating block (21) are provided with sliding grooves. An auxiliary cylinder (22) is fixedly connected to the center of the cross-shaped rotating block (21). A threaded rod (27) is internally threaded at the end of the auxiliary cylinder (22) away from the cross-shaped rotating block (21).

3. The vacuum isothermal forging apparatus according to claim 2, characterized in that: The outer surface of the threaded rod (27) is rotatably connected to a first cylinder (26), and the first cylinder (26) can move together with the threaded rod (27). The outer surface of the first cylinder (26) is fixedly connected to a second auxiliary plate (25), and the side of the second auxiliary plate (25) is rotatably connected to a connecting rod (24). The end of the connecting rod (24) away from the second auxiliary plate (25) is rotatably connected to a first auxiliary plate (23), and the first auxiliary plate (23) is slidably connected inside the groove opened in the cross-shaped rotating block (21).

4. The vacuum isothermal forging apparatus according to claim 3, characterized in that: The first auxiliary plate (23) is fixedly connected to the third auxiliary plate (210) on the side away from the connecting rod (24). The third auxiliary plate (210) is provided with a number of wedge blocks (28) on the side away from the first auxiliary plate (23). The quick replacement mechanism (2) also includes a second cylinder (29). The second cylinder (29) wraps the third auxiliary plate (210) inside, and the inner wall of the second cylinder (29) is provided with a threaded groove. The bottom end of the second cylinder (29) is fixedly connected to an upper mold (211).

5. The vacuum isothermal forging apparatus according to claim 1, characterized in that: The auxiliary forging mechanism (3) includes a base (31), and the base (31) is fixedly connected to the bottom surface of the inner wall of the device body (1). The inner wall of the base (31) is slidably connected to a first slider (32) and a second slider (39). The opposite sides of the first slider (32) and the second slider (39) are rotatably connected to a first arc block (33), and the side of the first arc block (33) away from the first slider (32) is rotatably connected to a second arc block (34).

6. The vacuum isothermal forging apparatus according to claim 5, characterized in that: An airbag (35) is provided inside the second arc-shaped block (34). A flexible plate (36) is fixedly connected inside the second arc-shaped block (34). A touch plate (37) is fixedly connected to the bottom surface of the inner wall of the second arc-shaped block (34), and the touch plate (37) is located on both sides of the flexible plate (36). An inflation device (38) is fixedly connected to the bottom surface of the second arc-shaped block (34), and the inflation device (38) is located inside the second arc-shaped block (34).

7. The vacuum isothermal forging apparatus according to claim 6, characterized in that: The base (31) is rotatably connected to a reciprocating screw (311) on its side, and the first slider (32) and the second slider (39) are threadedly connected to the outer surface of the reciprocating screw (311). The two ends of the reciprocating screw (311) are provided with threads in opposite directions. The end of the first slider (32) away from the reciprocating screw (311) is fixedly connected to an auxiliary block (312), and the auxiliary block (312) is provided with a telescopic rod inside, and the end of the telescopic rod away from the auxiliary block (312) is rotatably connected to a gear (313).

8. A vacuum isothermal forging apparatus according to claim 7, characterized in that: A roller (315) is fixedly connected to one end of the gear (313) away from the auxiliary block (312). A rack (314) is fixedly connected to one side of the base (31) near the auxiliary block (312), and the rack (314) meshes with the gear (313). A storage box (310) is fixedly connected to one end of the base (31) away from the first slider (32), and the storage box (310) has a notch that is adapted to the size of the roller (315).