A valve body precision die forging forming device

Abstract

This utility model relates to the technical field of precision forging equipment for valve bodies, and discloses a precision forging device for valve bodies, including a support platform, a support mechanism fixed to the upper end of the support platform, a support plate fixed to the top of the support mechanism, an upper pressing mechanism disposed on the support plate, and a lower die disposed above the support platform. A support block is fixed to the upper end of the support platform, and the lower die is fixed to the upper end of the support block. A first groove for supporting the valve body blank is opened at the upper end of the lower die, and two stops are symmetrically fixed to the upper end of the lower die. A movable support assembly is provided at the upper end of the lower die, and the two sides of the movable support assembly are respectively fitted and limited by the two stops. A lateral drive mechanism is provided on one side of the support platform, and a support seat is provided on the other side. The lateral drive mechanism includes a guide fixing seat and a second hydraulic cylinder. This utility model has the advantages of accurate positioning, high forging quality, convenient operation, and high production efficiency.

Description

Technical Field

[0001] This utility model relates to the technical field of valve body precision die forging equipment, specifically a valve body precision die forging device. Background Technology

[0002] The valve body is the core pressure-bearing component of a fluid control valve, and its forming quality directly affects the valve's sealing performance and service life. Currently, valve body blanks are mostly formed using die forging, which involves extruding heated metal blanks through the cooperation of an upper and lower die.

[0003] However, existing valve body forging equipment has many shortcomings in practical applications. First, existing valve body forging equipment lacks a dedicated lateral positioning and driving mechanism, making the valve body blank prone to lateral displacement during forging, resulting in a large coaxiality deviation between the flange and the valve tube, directly affecting the subsequent machining accuracy. Second, for valve body blanks with mounting caps, existing equipment requires repeated adjustments to the blank position to align the flange through hole with the mold positioning post during forging, which is cumbersome, inefficient, and difficult to guarantee the accuracy of manual alignment. Third, existing equipment cannot provide effective internal wall support for the valve tube during forging, making the valve tube end prone to radial deformation or instability during forging, resulting in uneven wall thickness or even scrapping of the valve tube. In addition, when changing to different specifications of valve body blanks, the adjustment of the mold and positioning structure is complex and time-consuming, making it difficult to meet the rapid mold change requirements of multi-variety, small-batch production.

[0004] Therefore, how to design a valve body precision forging device that can achieve accurate positioning of valve body blanks, lateral stable support, quick alignment of mounting caps, and convenient mold changing has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a precision forging device for valve bodies, which has the advantages of accurate positioning, high forging quality, convenient operation, and high production efficiency, and solves the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A precision forging device for valve bodies includes a support platform, a support mechanism fixed to the upper end of the support platform, a support plate fixed to the top of the support mechanism, an upper pressing mechanism disposed on the support plate, and a lower die disposed above the support platform. A support block is fixed to the upper end of the support platform, and the lower die is fixed to the upper end of the support block. A first groove for supporting valve body blanks is opened at the upper end of the lower die, and two stops are symmetrically fixed to the upper end of the lower die. A movable support assembly is provided at the upper end of the lower die, and the two sides of the movable support assembly are respectively fitted and limited by the two stops. A lateral drive mechanism is provided on one side of the support platform, and a support seat is provided on the other side. The lateral drive mechanism includes a guide fixing seat and a second hydraulic cylinder. The guide fixing seat is fixed to the side wall of the support platform, and the second hydraulic cylinder is fixed to the guide fixing seat. A first through hole is opened through the guide fixing seat, and a sliding device is provided in the first through hole. The system includes a movable column with a movable cylinder fitted around its outer periphery near the valve body blank. The outer wall of the movable cylinder is used to fit and position itself against the inner wall of the valve tube. A second fixed block is fixed to the output shaft of the second hydraulic cylinder. A connecting block is fixed to the side wall of the second fixed block. The side wall of the connecting block is fixed to the outer wall of the movable cylinder to drive the movable cylinder and movable column to slide along the axial direction of the valve tube, so that the outer wall of the movable cylinder fits and positions itself against the inner wall of the valve tube. A limiting and positioning component is provided above the movable support assembly. The limiting and positioning component includes a mounting block and multiple limiting columns fixed to the upper end of the mounting block. The lower end of the mounting block fits against the upper end of the movable support assembly. A coaxial flange and mounting cover are provided on the upper end of the matching valve body blank. The flange and mounting cover have corresponding through holes, and the limiting columns slide through the corresponding through holes. An upper pressing mechanism is used to mold the mounting cover downwards.

[0007] Preferably, the support mechanism consists of four first support columns, which are respectively fixed to the four corner edges of the upper part of the support platform; the pressing mechanism includes a first hydraulic cylinder fixed to the upper part of the support plate, and a pressing block fixed to the lower end of the output shaft of the first hydraulic cylinder. The output shaft of the first hydraulic cylinder extends vertically downward through the support plate, and the pressing block is located directly above the mounting cover.

[0008] It is worth noting that the symmetrical arrangement of the four first support columns at the four corners of the bearing platform ensures the installation stability and force balance of the bearing plate and the first hydraulic cylinder on it. The first hydraulic cylinder drives the lower pressure block to move vertically downward, directly acting on the top of the mounting cover. The forging pressure is transmitted vertically along the axis of the mounting cover, avoiding the tilting or misalignment of the valve body blank caused by the eccentric load, and ensuring the coaxiality and tightness of the forging press between the mounting cover and the flange.

[0009] Preferably, the movable support component includes a first support block placed on the upper end of the lower mold and a movable plate fixed to the upper end of the first support block; both ends of the first support block are respectively attached to the ends of the two stops that are close to each other, and the lower end surface of the mounting block is attached to the upper end surface of the movable plate.

[0010] It is worth noting that the first support block and the movable plate constitute an independently replaceable support unit. The first support block is clamped and limited between the two stops along the axial direction of the first groove, which not only ensures that the support assembly will not move circumferentially during the die forging process, but also allows for quick die change by replacing the movable support assembly as a whole when using valve body blanks of different specifications. The movable plate, as the direct support surface of the limiting and positioning assembly, provides a stable horizontal positioning reference for the mounting block with its flat upper surface, ensuring that the limiting post always remains vertical, thereby ensuring the repeatability accuracy of the alignment between the flange and the mounting cover through hole.

[0011] Preferably, the guide fixing seat includes a first fixing block fixed to the side wall of the support platform, a side plate fixed to the side wall of the first fixing block, and a fixing plate fixed to the side wall of the side plate; a first through hole is formed on the first fixing block, and a second hydraulic cylinder is fixed to the fixing plate.

[0012] It is worth noting that the first fixed block, the side plate, and the fixed plate form a stepped fixed seat structure, which not only ensures the coaxiality between the second hydraulic cylinder and the first through hole, but also provides sufficient installation and maintenance space between the second hydraulic cylinder and the first fixed block through the spacing of the side plate. The first through hole is opened on the first fixed block and serves as a sliding guide hole for the movable column. Its sliding fit with the movable column ensures the straightness of the movable column's feed direction, ensuring that the movable cylinder can be accurately inserted into the inner wall of the valve tube to complete the positioning.

[0013] Preferably, the support is a third support block, which is fixed to the side wall of the bearing platform away from the guide fixing seat. The upper end of the third support block is provided with a second groove, and the lower outer peripheral wall of the movable column abuts against the bottom surface of the inner wall of the second groove.

[0014] It is worth noting that the third support block is located on the other side of the support platform and is arranged opposite to the lateral drive mechanism. The second groove provides auxiliary support for the free end of the movable column, effectively preventing the movable column from sagging and deforming under gravity due to excessive overhang. This ensures the coaxial fit accuracy between the movable cylinder and the valve pipe, while reducing the uneven wear between the movable column and the first through hole and extending the service life of the guide mating surface.

[0015] Preferably, the movable cylinder is fixedly sleeved at the end of the movable column, and the outer diameter of the movable cylinder is adapted to the inner diameter of the valve pipe.

[0016] It is worth noting that the movable cylinder, as a positioning component that directly contacts the inner wall of the valve tube, is installed at the end of the movable column in a detachable fixed sleeve manner. For valve body blanks of different specifications, only the movable cylinder with the corresponding outer diameter needs to be replaced to achieve universal compatibility, without the need to replace the entire movable column. The outer peripheral wall of the movable cylinder and the inner wall of the valve tube adopt a clearance fit, which not only ensures positioning accuracy, but also avoids the problem that the movable cylinder is difficult to pull out due to slight deformation of the valve tube after die forging.

[0017] Preferably, the outer peripheral wall of the movable column and the inner wall of the first through hole are in a clearance sliding fit.

[0018] It is worth noting that the sliding fit design facilitates the stable movement of the movable column.

[0019] Preferably, the valve body blank also includes a fixed pipe fixed to the upper end of the valve tube, and a flange fixed to the upper end of the fixed pipe; the flange has multiple second through holes, and the mounting cover has a third through hole corresponding to each of the second through holes; the lower end of the mounting cover is fixed to a limiting cylinder, and the outer peripheral wall of the limiting cylinder is fitted and positioned against the inner wall of the fixed pipe.

[0020] It is worth noting that the fixed pipe, as a transitional connector between the valve pipe and the flange, provides a precise positioning reference for the limiting cylinder on its inner wall; the mounting cover achieves rapid pre-positioning through the fit between the limiting cylinder and the inner wall of the fixed pipe, so that the second through hole on the flange and the third through hole on the mounting cover are basically aligned before the limiting post is inserted, which significantly shortens the operation time of the limiting post through the hole and improves the efficiency of die forging.

[0021] Preferably, the first groove is a semi-cylindrical groove, and the inner wall of the first groove is adapted to fit the lower outer peripheral wall of the valve tube; there are three limiting posts, and the three limiting posts are evenly distributed around the axis of the valve body blank in the circumferential direction.

[0022] It is worth noting that the semi-cylindrical groove structure increases the contact area with the lower outer peripheral wall of the valve tube, which can effectively bear and disperse the downward pressure from the upper pressing mechanism during the die forging process, preventing the valve tube from being crushed or deformed locally; the three limiting posts are evenly distributed around the axis of the valve body blank in the circumferential direction, so that the flange and the mounting cover are subjected to balanced forces in the circumferential direction, avoiding circumferential deflection caused by single or double positioning, and ensuring that the second and third through holes remain precisely aligned during the die forging process.

[0023] Preferably, the two stops are symmetrically arranged on both sides of the first groove, and the first support block is clamped between the two stops along the axial direction of the first groove.

[0024] It is worth noting that the two stops are symmetrically arranged on both sides of the first groove and form a clamping limit on the first support block along the axial direction of the first groove. This effectively constrains the circumferential and axial displacement of the movable support assembly under the impact of die forging, so that the movable plate is always stably kept in the correct position at the upper end of the lower die, providing a constant and reliable support reference for the limiting and positioning assembly.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, by setting a lateral drive mechanism, uses a second hydraulic cylinder to drive the movable cylinder to slide axially along the inner wall of the valve tube and accurately center it through a second fixed block and a connecting block. This achieves active radial support and positioning of the valve tube interior, solving the problem that the lack of valve tube inner wall support in existing equipment leads to easy radial deformation and uneven wall thickness at the valve tube end during die forging. This significantly improves the forming quality and finished product qualification rate of valve body die forging. 2. This utility model, by setting a limiting and positioning component consisting of an installation block and multiple limiting posts, combined with the detachable and replaceable design of the movable support component, achieves rapid and accurate alignment between the flange through hole and the mounting cover through hole, solving the problem of low efficiency caused by repeated adjustment of the billet position and manual alignment in existing equipment, and greatly improving the efficiency of die forging operations. 3. This utility model provides radial support for the valve tube during the forging process by using the fit and positioning of the movable cylinder with the inner wall of the valve tube and the support of the lower outer peripheral wall of the valve tube by the semi-cylindrical first groove. This effectively prevents radial deformation or instability of the valve tube end under forging pressure and improves the qualification rate of the forged product. 4. This utility model adopts a detachable and replaceable structure design for both the movable support component and the movable cylinder. For valve body blanks of different specifications, only the movable support component and the movable cylinder of the corresponding size need to be replaced to quickly complete the mold change. There is no need to make complex adjustments to the whole machine, which solves the problem of complicated and time-consuming mold change of existing equipment and meets the needs of rapid mold change for multi-variety small-batch production. Attached Figure Description

[0026] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the lower mold of this utility model; Figure 3 The diagram shown is a three-dimensional structural schematic of the movable support component of this utility model; Figure 4 The diagram shown is a three-dimensional structural schematic of the positioning and limiting component of this utility model. Figure 5 The diagram shown is a three-dimensional structural schematic of the lateral drive mechanism of this utility model. Figure 6 The diagram shown is a three-dimensional cross-sectional view of the present invention. Figure 7 The diagram shown is a three-dimensional disassembled structural diagram of the valve body blank and mounting cover of this utility model. Figure 8 The diagram shown is a three-dimensional structural schematic of the second fixing block of this utility model.

[0027] Reference numerals: 1. Support platform; 2. First support column; 3. Support plate; 4. First hydraulic cylinder; 5. Lower pressure block; 6. Support block; 7. Lower mold; 71. Stop block; 8. First groove; 9. Movable plate; 10. First support block; 11. Mounting block; 12. Limiting column; 13. First fixing block; 14. Side plate; 15. Fixing plate; 16. Second hydraulic cylinder; 17. First through hole; 18. Movable column; 19. Third support block; 20. Second groove; 21. Movable cylinder; 22. Valve pipe; 23. Fixing pipe; 24. Flange; 25. Second through hole; 26. Mounting cover; 27. Third through hole; 28. Limiting cylinder; 29. ​​Second fixing block; 30. Connecting block. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] To address the problems in existing technologies, such as the lack of support and easy deformation of the valve pipe inner wall during valve body forging, difficulties in aligning the mounting cover and flange, and complex and time-consuming mold changes, the following technical solution is proposed. Please refer to [link / reference]. Figures 1 to 8 .

[0030] A precision forging device for valve bodies includes a support platform 1, a support mechanism fixed to the upper end of the support platform 1, a support plate 3 fixed to the top of the support mechanism, an upper pressing mechanism disposed on the support plate 3, and a lower die 7 disposed above the support platform 1. A support block 6 is fixed to the upper end of the support platform 1, and the lower die 7 is fixed to the upper end of the support block 6. A first groove 8 for supporting the valve body blank is opened at the upper end of the lower die 7, and two stops 71 are symmetrically fixed to the upper end of the lower die 7. A movable support assembly is provided at the upper end of the lower die 7, and the two sides of the movable support assembly are respectively fitted and limited by the two stops 71. A lateral drive mechanism is provided on one side of the support platform 1, and a support seat is provided on the other side. The lateral drive mechanism includes a guide fixing seat and a second hydraulic cylinder 16. The guide fixing seat is fixed to the side wall of the support platform 1, and the second hydraulic cylinder 16 is fixed to the guide fixing seat. A first through hole 17 is opened through the guide fixing seat, and a movable column 18 is slidably disposed in the first through hole 17. A movable cylinder 21 is fitted around the outer periphery of one end of the valve body blank. The outer periphery of the movable cylinder 21 is used to fit and position itself against the inner wall of the valve tube 22. The output shaft of the second hydraulic cylinder 16 is fixedly connected to a second fixing block 29. A connecting block 30 is fixedly connected to the side wall of the second fixing block 29. The side wall of the connecting block 30 is fixedly connected to the outer periphery of the movable cylinder 21 to drive the movable cylinder 21 and the movable column 18 to slide along the axial direction of the valve tube 22, so that the outer periphery of the movable cylinder 21 fits and positions itself against the inner wall of the valve tube 22. A limiting positioning component is provided above the movable support assembly. The limiting positioning component includes a mounting block 11 and multiple limiting columns 12 fixed to the upper end of the mounting block 11. The lower end of the mounting block 11 fits against the upper end of the movable support assembly. The upper end of the adapted valve body blank is provided with a coaxial flange 24 and a mounting cover 26. The flange 24 and the mounting cover 26 have corresponding through holes. The limiting columns 12 slide through the through holes. The upper pressing mechanism is used to press the mounting cover 26 downward.

[0031] In this embodiment, specifically, the support mechanism consists of four first support columns 2, which are respectively fixed to the four corner edges of the upper end of the support platform 1; the pressing mechanism includes a first hydraulic cylinder 4 fixed to the upper end of the support plate 3, and a pressing block 5 fixed to the lower end of the output shaft of the first hydraulic cylinder 4. The output shaft of the first hydraulic cylinder 4 penetrates the support plate 3 vertically downwards, and the pressing block 5 is located directly above the mounting cover 26.

[0032] In this embodiment, specifically, the movable support component includes a first support block 10 placed on the upper end of the lower mold 7, and a movable plate 9 fixed to the upper end of the first support block 10; the two ends of the first support block 10 are respectively attached to the ends of the two stops 71 that are close to each other, and the lower end surface of the mounting block 11 is attached to the upper end surface of the movable plate 9.

[0033] In this embodiment, specifically, the guide fixing seat includes a first fixing block 13 fixed to the side wall of the bearing platform 1, a side plate 14 fixed to the side wall of the first fixing block 13, and a fixing plate 15 fixed to the side wall of the side plate 14; a first through hole 17 is opened on the first fixing block 13, and a second hydraulic cylinder 16 is fixed to the fixing plate 15.

[0034] In this embodiment, specifically, the support is a third support block 19, which is fixed to the side wall of the bearing platform 1 away from the guide fixing seat. The upper end of the third support block 19 is provided with a second groove 20, and the lower outer peripheral wall of the movable column 18 abuts against the bottom surface of the inner wall of the second groove 20.

[0035] In this embodiment, specifically, the movable cylinder 21 is fixedly sleeved on the end of the movable column 18, and the outer diameter of the movable cylinder 21 is adapted to the inner diameter of the valve pipe 22.

[0036] In this embodiment, specifically, the outer peripheral wall of the movable column 18 and the inner wall of the first through hole 17 are in a clearance sliding fit.

[0037] In this embodiment, specifically, the valve body blank also includes a fixed pipe 23 fixed to the upper end of the valve pipe 22, and a flange 24 fixed to the upper end of the fixed pipe 23; the flange 24 has a plurality of second through holes 25, and the mounting cover 26 has a third through hole 27 corresponding to the second through holes 25; the lower end of the mounting cover 26 is fixed to a limiting cylinder 28, and the outer peripheral wall of the limiting cylinder 28 is fitted and positioned against the inner wall of the fixed pipe 23.

[0038] In this embodiment, specifically, the first groove 8 is a semi-cylindrical groove, and the inner wall of the first groove 8 is adapted to fit and fit the lower outer peripheral wall of the valve tube 22; there are three limiting posts 12, and the three limiting posts 12 are evenly distributed around the axis of the valve body blank in the circumferential direction.

[0039] In this embodiment, specifically, two stop blocks 71 are symmetrically arranged on both sides of the first groove 8, and the first support block 10 is clamped between the two stop blocks 71 along the axial direction of the first groove 8.

[0040] Working principle: When in use, the operator first selects the appropriate movable support component and the movable cylinder 21 with the corresponding outer diameter according to the specifications of the valve body blank to be processed, places the movable support component on the upper end of the lower mold 7, so that the two ends of the first support block 10 are respectively attached to the two stops 71 that are close to each other, and completes the positioning of the movable support component in the axial direction of the first groove 8. Subsequently, the valve body blank pre-installed with the mounting cover 26 is manually placed on top of the movable support assembly. Specifically, the limiting cylinder 28 at the lower end of the mounting cover 26 is inserted into the inner wall of the fixed tube 23, so that the outer peripheral wall of the limiting cylinder 28 fits and is positioned against the inner wall of the fixed tube 23. At this time, the second through hole 25 on the flange 24 and the third through hole 27 on the mounting cover 26 are basically aligned. Then, holding the mounting block 11, the three limiting pins 12 are aligned with the second through hole 25 of the flange 24 and the third through hole 27 of the mounting cover 26 and inserted until the lower end face of the mounting block 11 fits against the upper end face of the movable plate 9, and the lower outer peripheral wall of the valve tube 22 falls into the first groove 8 and fits against its inner wall. After the valve body blank is placed, the lateral drive mechanism is activated. The second hydraulic cylinder 16 drives the movable cylinder 21, along with the movable column 18, to slide towards the side closer to the valve body blank along the guide direction of the first through hole 17 via the second fixed block 29 and the connecting block 30. The outer peripheral wall of the movable cylinder 21 gradually extends into the inner wall of the valve tube 22 until it precisely fits and is positioned against the inner wall of the valve tube 22. At this time, the movable cylinder 21 accurately stops at the center position of the valve tube 22, achieving radial support and centering of the valve tube. At the same time, the lower outer peripheral wall of the movable column 18 abuts against the bottom surface of the inner wall of the second groove 20 at the upper end of the third support block 19, providing auxiliary support for the movable column. Then the upper pressing mechanism is activated, and the first hydraulic cylinder 4 drives the lower pressing block 5 to move vertically downward, applying forging pressure to the upper end face of the mounting cover 26, pressing the mounting cover 26 and the flange 24 together under the guidance of the limiting post 12. During the forging process, the first groove 8 provides support for the lower outer peripheral wall of the valve tube 22, and the movable cylinder 21 provides radial support for the inner wall of the valve tube 22. The two work together to prevent the valve tube 22 from undergoing radial deformation under the forging pressure. After the die forging is completed, the first hydraulic cylinder 4 drives the lower pressure block 5 to rise and reset, and the second hydraulic cylinder 16 drives in the opposite direction. Through the second fixed block 29 and the connecting block 30, the movable cylinder 21 and the movable column 18 are smoothly pulled out from the inner wall of the valve tube 22 along the axis. The operator lifts the mounting block 11 upward to make the limiting column 12 exit from the second through hole 25 and the third through hole 27, and then the die-forged valve body blank can be taken out. When it is necessary to replace the valve body blank of different specifications, only the corresponding size of the movable support component and the corresponding outer diameter of the movable cylinder 21 need to be replaced, without the need for complex adjustments to the whole machine.

[0041] 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.

[0042] Although embodiments of the present 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 present invention.

Claims

1. A valve body precision forging forming device, comprising a support platform (1), a support mechanism fixed to the upper end of the support platform (1), a support plate (3) fixed to the top of the support mechanism, an upper pressing mechanism disposed on the support plate (3), and a lower die (7) disposed above the support platform (1), characterized in that: A support block (6) is fixedly connected to the upper end of the support platform (1), and the lower mold (7) is fixedly connected to the upper end of the support block (6); the upper end of the lower mold (7) is provided with a first groove (8) for supporting the valve body blank, and two stops (71) are symmetrically fixedly connected to the upper end of the lower mold (7); the upper end of the lower mold (7) is provided with a movable support component, and the two sides of the movable support component are respectively fitted and limited by the two stops (71); A lateral drive mechanism is provided on one side of the support platform (1), and a support seat is provided on the other side; the lateral drive mechanism includes a guide fixing seat and a second hydraulic cylinder (16), the guide fixing seat is fixedly connected to the side wall of the support platform (1), and the second hydraulic cylinder (16) is fixedly connected to the guide fixing seat; the guide fixing seat has a first through hole (17) through it, and a movable column (18) is slidably provided in the first through hole (17), and a movable cylinder (21) is sleeved on the outer periphery of the end of the movable column (18) near the valve body blank. The outer peripheral wall of the moving cylinder (21) is used to fit and position against the inner wall of the valve tube (22); the output shaft of the second hydraulic cylinder (16) is fixedly connected to the second fixing block (29), and the side wall of the second fixing block (29) is fixedly connected to the connecting block (30). The side wall of the connecting block (30) is fixedly connected to the outer peripheral wall of the moving cylinder (21) to drive the moving cylinder (21) and the moving column (18) to slide along the axial direction of the valve tube (22), so that the outer peripheral wall of the moving cylinder (21) fits and positions against the inner wall of the valve tube (22); A limiting and positioning component is provided above the movable support component. The limiting and positioning component includes a mounting block (11) and multiple limiting posts (12) fixed to the upper end of the mounting block (11). The lower end of the mounting block (11) is in contact with the upper end of the movable support component. The upper end of the matching valve body blank is provided with a coaxial flange (24) and a mounting cover (26). The flange (24) and the mounting cover (26) have corresponding through holes. The limiting posts (12) slide through the through holes. The upper pressing mechanism is used to press the mounting cover (26) downward.

2. The valve body precision die forging forming apparatus according to claim 1, wherein The support mechanism consists of four first support columns (2), which are fixed to the four corner edges of the upper end of the support platform (1). The pressing mechanism includes a first hydraulic cylinder (4) fixed to the upper end of the support plate (3) and a pressing block (5) fixed to the lower end of the output shaft of the first hydraulic cylinder (4). The output shaft of the first hydraulic cylinder (4) penetrates the support plate (3) vertically downwards, and the pressing block (5) is located directly above the mounting cover (26).

3. The valve body precision die forging forming apparatus according to claim 1, wherein The movable support assembly includes a first support block (10) placed on the upper end of the lower mold (7) and a movable plate (9) fixed to the upper end of the first support block (10); the two ends of the first support block (10) are respectively attached to the ends of the two stops (71) that are close to each other, and the lower end face of the mounting block (11) is attached to the upper end face of the movable plate (9).

4. The valve body precision die forging forming apparatus according to claim 1, wherein The guide fixing seat includes a first fixing block (13) fixed to the side wall of the bearing platform (1), a side plate (14) fixed to the side wall of the first fixing block (13), and a fixing plate (15) fixed to the side wall of the side plate (14); a first through hole (17) is opened on the first fixing block (13), and a second hydraulic cylinder (16) is fixed to the fixing plate (15).

5. The valve body precision forging device according to claim 1, characterized in that, The support is a third support block (19), which is fixed to the side wall of the bearing platform (1) away from the guide fixing seat. The upper end of the third support block (19) is provided with a second groove (20), and the lower outer peripheral wall of the movable column (18) abuts against the bottom surface of the inner wall of the second groove (20).

6. The valve body precision die forging forming apparatus according to claim 1, wherein The movable cylinder (21) is fixedly sleeved at the end of the movable column (18), and the outer diameter of the movable cylinder (21) is matched with the inner diameter of the valve pipe (22).

7. The valve body precision die forging forming apparatus according to claim 1, wherein The outer peripheral wall of the movable column (18) and the inner wall of the first through hole (17) are in a clearance sliding fit.

8. The valve body precision die forging forming apparatus according to claim 1, wherein The valve body blank also includes a fixed pipe (23) fixed to the upper end of the valve pipe (22), and a flange (24) fixed to the upper end of the fixed pipe (23); the flange (24) is provided with multiple second through holes (25), and the mounting cover (26) is provided with a third through hole (27) corresponding to the second through holes (25); the lower end of the mounting cover (26) is fixed with a limiting cylinder (28), and the outer peripheral wall of the limiting cylinder (28) is fitted and positioned against the inner wall of the fixed pipe (23).

9. The valve body precision die forming apparatus of claim 1, wherein The first groove (8) is a semi-cylindrical groove, and the inner wall of the first groove (8) is adapted to fit the lower outer peripheral wall of the valve tube (22); there are three limiting posts (12), and the three limiting posts (12) are evenly distributed around the axis of the valve body blank in the circumferential direction.

10. A valve body precision forging device according to claim 3, characterized in that, Two stops (71) are symmetrically arranged on both sides of the first groove (8), and the first support block (10) is clamped between the two stops (71) along the axial direction of the first groove (8).

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