Manufacturing process of duplex stainless steel valve cover

Abstract

The present disclosure relates to the technical field of valve cover manufacturing, and particularly relates to a duplex stainless steel valve cover manufacturing process. The technical scheme comprises the following: the duplex stainless steel valve cover manufacturing process is based on an auxiliary forging device, the auxiliary forging device comprises a clamp assembly, the clamp assembly comprises a clamp main arm and a clamp head installed at the end of the clamp main arm for clamping a blank; a universal rotation mechanism is comprised, the universal rotation mechanism is used for providing universal rotation of the clamp assembly; a mold transfer mechanism is comprised, the mold transfer mechanism is fixedly connected with a mold and drives the mold to rotate above the blank; a linkage mechanism is comprised, the linkage mechanism combines the rotating action of the clamp assembly with the rotating action of the mold transfer mechanism. The present disclosure can clamp the blank through the clamp assembly, support the clamp assembly through the universal rotation mechanism, make it clamp and transfer the blank in a more labor-saving lever mode, and the universal rotation mechanism and the clamp assembly rotate universally, thereby ensuring flexibility of transfer.

Description

Technical Field

[0001] This disclosure relates to the field of valve cover manufacturing technology, and in particular to the manufacturing process of duplex stainless steel valve covers. Background Technology

[0002] When manufacturing valve covers using duplex stainless steel, forging and punching are required. During forging, a worker uses tongs to hold the workpiece blank on a platform under forging equipment such as an air hammer. After being forged into an upsetting shape, a die is placed in the center of one side of the workpiece using tongs. The forging equipment presses the die into the workpiece to form a punch. Then, the worker uses tongs to flip the workpiece over and uses the die to punch away the connecting skin on the other side of the workpiece, thus completing the punching process.

[0003] In the aforementioned manufacturing process for duplex stainless steel valve covers, the transfer and flipping of the workpiece blanks require workers to use tongs, which is not only laborious but also prone to causing accidents due to exhaustion and the hot blank slipping from their hands. Therefore, this disclosure proposes a safer and more labor-saving manufacturing process for duplex stainless steel valve covers. Summary of the Invention

[0004] The purpose of this disclosure is to address the problems existing in the background art by proposing a manufacturing process for duplex stainless steel valve covers.

[0005] The technical solution disclosed herein is a manufacturing process for duplex stainless steel valve covers. This manufacturing process is based on an auxiliary forging device, which includes a clamp assembly comprising a clamp main arm and a clamp head mounted at the end of the clamp main arm for clamping the blank; it also includes a universal rotation mechanism for providing universal rotation of the clamp assembly; a mold transfer mechanism fixedly connected to the mold and driving the mold to rotate above the blank; and a linkage mechanism that combines the rotational action of the clamp assembly with the rotational action of the mold transfer mechanism, enabling the mold transfer mechanism to automatically drive the mold to rotate and move.

[0006] Optional steps include the following:

[0007] S1. Using an auxiliary forging device, the heated cylindrical billet is placed on the hammer forging worktable for upsetting.

[0008] S2. Using an auxiliary forging device, place a mold at the center of the upper end of the upsetting billet to pre-form the center hole;

[0009] S3. Use an auxiliary forging device to flip the billet and remove the outer skin;

[0010] S4. The die is forged on a forging machine using a special die.

[0011] Optionally, the universal rotating mechanism includes a universal bushing, a universal shaft that rotates universally with the universal bushing, and a cylinder fixedly connected to the top of the universal shaft. The universal bushing is fixedly connected to the rotating shaft and rotatably connected to the first fixed seat through the rotating shaft. The bottom end of the first fixed seat is fixedly connected to the upper surface of the hammer forging worktable.

[0012] Optionally, the main arm of the clamp is rotatably connected to the shaft cylinder, and a clamp head mounting box is fixedly connected to one end of the main arm of the clamp. A pair of clamp heads are provided and are slidably connected to the clamp head mounting box. A connecting plate extending into the interior of the clamp head mounting box is fixedly connected to one end of each clamp head. A guide light rod is fixedly connected between the inner walls of the two ends of the clamp head mounting box. The guide light rod passes through the connecting plate and is fitted with a first spring at both ends of the guide light rod for pushing the two clamp heads closer to each other.

[0013] Optionally, the clamp assembly further includes a pair of connecting rods located inside the clamp main arm and a handle box fixedly connected to the other end of the clamp main arm. One end of the connecting rod extends into the clamp head mounting box and is fixedly connected to the corresponding connecting plate. The other end of the connecting rod extends into the handle box and is fixedly connected to a spring plate. A second spring is provided at both ends of the handle box. The second spring is used to push the spring plate. A ring is movably sleeved on the outside of both ends of the handle box. The two rings are fixedly connected to the connecting rods at the corresponding positions through a connecting short shaft. The cylindrical wall of the handle box is provided with a guide groove for the connecting short shaft to move.

[0014] Optionally, the mold transfer mechanism includes a connecting bar that is rotatably connected to the hammer forging worktable via a rotating column. A chuck mounting plate is vertically and elastically connected to the upper surface of one end of the connecting bar via a guide shaft and a return spring. A pair of chucks for clamping the mold are locked and fixed at one end of the chuck mounting plate.

[0015] Optionally, the bottom end of the guide shaft is fixedly connected to the upper surface of the connecting strip, the top end of the guide shaft movably passes through the chuck mounting plate, and the reset spring is movably sleeved with the guide shaft to push the chuck mounting plate upward to reset.

[0016] Optionally, one end of the chuck mounting plate is fixedly connected to a fixing screw, which movably passes through one end of the two chucks, and the fixing screw is helically connected to a nut for pushing and locking the chucks.

[0017] Optionally, the linkage mechanism includes a second fixed seat fixed to the upper surface of the hammer forging workbench, a first bevel gear rotatably connected to the top of the second fixed seat, a keyway plate fixedly connected to the end of the first bevel gear facing the clamp assembly, and a key block that can be vertically inserted into the keyway plate fixedly connected to the outer wall of the handle box.

[0018] Optionally, the linkage mechanism includes a gear shaft rotatably connected to the forging worktable. A second bevel gear meshing with a first bevel gear is fixedly connected to the top of the gear shaft. A first transmission wheel is fixedly connected to the bottom of the gear shaft. A gear set is rotatably connected inside one end of the forging worktable. The gear set includes a second transmission wheel and a driving wheel coaxially fixedly connected. The second transmission wheel is connected to the first transmission wheel via a transmission belt. A driven wheel is fixedly connected to the bottom of the rotating column, and the driven wheel meshes with the driving wheel.

[0019] Compared with the prior art, this disclosure has the following beneficial technical effects:

[0020] This application uses a clamping assembly to hold the billet, and a universal rotating mechanism to support the clamping assembly, enabling it to clamp and transfer the billet in a more effortless lever mode. Furthermore, the universal rotating mechanism and the clamping assembly can rotate in all directions to ensure the flexibility of the transfer.

[0021] Furthermore, the mold can be clamped by the mold transfer mechanism and can be rotated horizontally above the blank for punching the blank;

[0022] Furthermore, the rotation of the clamping assembly can be combined with the rotation of the mold transfer mechanism through a linkage mechanism, so that when the blank is vertically flipped 180° by the clamping assembly, the mold transfer mechanism can automatically rotate the mold horizontally by 90° to above the blank. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the auxiliary forging device in the manufacturing process of duplex stainless steel valve covers.

[0024] Figure 2 for Figure 1 Schematic diagram of the omnidirectional rotating mechanism;

[0025] Figure 3 for Figure 1 A schematic diagram of the middle clamp assembly;

[0026] Figure 4 for Figure 3 Cross-sectional view of the middle clamp assembly;

[0027] Figure 5 for Figure 1 Schematic diagram of the mold transfer mechanism;

[0028] Figure 6 for Figure 1 A schematic diagram of the linkage mechanism.

[0029] Attached reference numerals: 1. Forging worktable;

[0030] 2. Raw material;

[0031] 3. First fixed seat;

[0032] 4. Universal rotating mechanism; 41. Rotating shaft; 42. Universal sleeve; 43. Universal joint; 44. Shaft sleeve;

[0033] 5. Clamp assembly; 51. Clamp main arm; 52. Clamp head mounting box; 521. Guide rod; 522. First spring; 53. Clamp head; 531. Connecting plate; 54. Handle box; 541. Guide groove; 55. Connecting rod; 551. Connecting short shaft; 56. Spring plate; 57. Second spring; 58. Ring;

[0034] 6. Molds;

[0035] 7. Mold transfer mechanism; 71. Connecting bar; 72. Guide shaft; 73. Return spring; 74. Chuck mounting plate; 75. Chuck; 76. Fixing screw; 77. Nut; 78. Rotating column;

[0036] 8. Linkage mechanism; 81. Second fixed seat; 82. First bevel gear; 821. Keyway plate; 83. Key block; 84. Gear shaft; 841. Second bevel gear; 842. First transmission wheel; 85. Transmission belt; 86. Second transmission wheel; 87. Driving wheel; 88. Driven wheel. Detailed Implementation

[0037] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this disclosure.

[0038] In the description of this disclosure, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this disclosure, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this disclosure based on the specific circumstances.

[0040] Example 1

[0041] like Figure 1-6 As shown, the manufacturing process for duplex stainless steel valve covers proposed in this disclosure is based on an auxiliary forging device, which consists of the following structure:

[0042] It includes a universal rotating mechanism 4, which provides universal rotation of the clamp assembly 5; the universal rotating mechanism 4 includes a universal bushing 42, a universal shaft 43 that rotates universally with the universal bushing 42, and a shaft sleeve 44 that is fixedly connected to the top of the universal shaft 43. The universal bushing 42 is fixedly connected to a pair of rotating shafts 41 and is rotatably connected to the top of the first fixed seat 3 through the two rotating shafts 41. The bottom end of the first fixed seat 3 is fixedly connected to the upper surface of the hammer forging worktable 1 by bolts.

[0043] The system includes a clamp assembly 5, which comprises a clamp main arm 51 rotatably connected to a shaft cylinder 44. A clamp head mounting box 52 is fixedly connected to one end of the clamp main arm 51. A pair of clamp heads 53 are slidably connected to the clamp head mounting box 52, and a connecting plate 531 extending into the interior of the clamp head mounting box 52 is fixedly connected to one end of each clamp head 53. Four guide rods 521 are fixedly connected between the inner walls of both ends of the clamp head mounting box 52, and the four guide rods 521 movably pass through the four corners of the connecting plate 531. A first spring 522 is movably sleeved at both ends of each guide rod 521. One end of the first spring 522 is fixedly connected to the inner wall of the clamp head mounting box 52, and the other end is fixedly connected to the adjacent connecting plate 531. The elastic thrust of the first spring 522 causes the two clamp heads 53 to move closer together to clamp the blank 2.

[0044] The clamp assembly 5 also includes a pair of connecting rods 55 located within the clamp main arm 51 and a handle box 54 fixedly connected to the other end of the clamp main arm 51. Each connecting rod 55 has a horizontal axis and a pair of vertical axes, and the two connecting rods 55 are arranged in a U-shape and an inverted U-shape, one above the other. One vertical axis end of the connecting rod 55 extends into the clamp head mounting box 52 and is fixedly connected to the corresponding connecting plate 531. The other vertical axis end of the connecting rod 55 extends into the handle box 54 and is fixedly connected to a spring plate 56. A second spring 57 is provided at both ends inside the handle box 54. One end of the second spring 57 is fixedly connected to the inner wall of the handle box 54, and the other end of the second spring 57 is fixedly connected to the adjacent spring plate 56. The elastic thrust of the second spring 57 brings the two spring plates 56 closer together, that is, the connecting rods 55 and the connecting plate 531 bring the two clamp heads 53 closer together, increasing the clamping force on the blank 2. Both ends of the handle box 54 are movably fitted with a ring 58. The two rings 58 are fixedly connected to the connecting rods 55 at the corresponding positions via a connecting short shaft 551. The cylindrical wall of the handle box 54 is provided with a guide groove 541 for the connecting short shaft 551 to move.

[0045] The system includes a mold transfer mechanism 7, which comprises a connecting bar 71 rotatably connected to the forging worktable 1 via a rotating column 78. Multiple guide shafts 72 are fixedly connected to the upper surface of one end of the connecting bar 71, and a chuck mounting plate 74 is movably sleeved on the guide shafts 72. A return spring 73 is movably sleeved below the chuck mounting plate 74 on the guide shafts 72, and the return spring 73 pushes the chuck mounting plate 74 upwards to return it to its original position using elastic force. A fixing screw 76 is fixedly connected to one end of the chuck mounting plate 74, and the fixing screw 76 movably passes through one end of two chucks 75. The fixing screw 76 is screwed with nuts 77 for pushing and locking the chucks 75, thus clamping the mold 6 between the two chucks 75.

[0046] The system includes a linkage mechanism 8, which combines the rotation of the clamp assembly 5 with the rotation of the mold transfer mechanism 7, causing the mold transfer mechanism 7 to automatically drive the mold 6 to rotate and move. The linkage mechanism 8 includes a second fixed base 81 fixed to the upper surface of the hammer forging worktable 1. A first bevel gear 82 is rotatably connected to the top of the second fixed base 81. A keyway plate 821 is fixedly connected to the end of the first bevel gear 82 facing the clamp assembly 5. The keyway plate 821 has a rectangular through slot. A key block 83, which can vertically engage with the rectangular through slot, is fixedly connected to the outer wall of the handle box 54. The engagement between the key block 83 and the keyway plate 821 not only enables the linkage mechanism 8 to function but also positions the clamp assembly 5, allowing it to accurately clamp the blank 2 to the center position on the upper surface of the hammer forging worktable 1. The linkage mechanism 8 also includes a gear shaft 84 rotatably connected to one end of the hammer forging worktable 1. A second bevel gear 841, meshing with the first bevel gear 82, is fixedly connected to the top of the gear shaft 84, and a first transmission wheel 842 is fixedly connected to the bottom end of the gear shaft 84. The other end of the hammer forging workbench 1 is internally connected to a gear set, which includes a second transmission wheel 86 and a driving wheel 87 coaxially fixed. The second transmission wheel 86 is connected to the first transmission wheel 842 via a transmission belt 85. The bottom end of the rotating column 78 is fixedly connected to a driven wheel 88, which meshes with the driving wheel 87. The transmission ratio between the driven wheel 88 and the driving wheel 87 is 2:1, so as to ensure that when the clamp assembly 5 drives the billet 2 to rotate vertically by 180°, the mold transfer mechanism 7 drives the mold 6 to rotate horizontally by 90°.

[0047] The working principle of this embodiment is as follows: the clamping assembly 5 can clamp the blank 2, and the universal rotating mechanism 4 can support the clamping assembly 5, so that it can clamp and transfer the blank 2 in a more effortless lever mode. Furthermore, the universal rotating mechanism 4 and the clamping assembly 5 can rotate in all directions to ensure the flexibility of the transfer.

[0048] The mold 6 can be clamped by the mold transfer mechanism 7 and can be rotated horizontally above the blank 2 for punching the blank 2.

[0049] The rotation of the clamp assembly 5 can be combined with the rotation of the mold transfer mechanism 7 through the linkage mechanism 8, so that when the blank 2 is rotated vertically by the clamp assembly 5 and flipped over by 180°, the mold transfer mechanism 7 can automatically rotate the mold 6 horizontally by 90° to above the blank 2.

[0050] Example 2

[0051] like Figure 1-6 As shown, the manufacturing process for the duplex stainless steel valve cover proposed in this disclosure, based on the auxiliary forging apparatus of Embodiment 1, mainly includes the following steps:

[0052] S1. Using the clamp assembly 5, the heated cylindrical billet 2 is placed on the forging workbench 1 for upsetting. Specifically: the worker holds the handle box 54 and rotates the clamp main arm 51 omnidirectionally around the universal rotating mechanism 4 to the billet 2 to be clamped. The two rings 58 are pushed horizontally to separate them. The two rings 58, through the connecting short shaft 551, connecting rod 55, and connecting plate 531, drive the two clamp heads 53 to separate to a diameter larger than that of the billet 2. Then, the rings 58 are released, and under the elastic thrust of the second spring 57 and the first spring 522, the two clamp heads 53 are brought closer together to clamp the billet 2. Then, the worker holds the handle box 54 again and rotates the universal rotating mechanism 4 to the billet 2. The rotating mechanism 4 drives the clamp main arm 51 to rotate in all directions to transfer the billet 2 to the position above the hammer forging worktable 1. Then, the position of the universal adjustment handle box 54 is adjusted so that the key block 83 is vertically inserted into the rectangular through slot of the keyway plate 821 from below. Then, the handle box 54 is lifted upward with the rotating shaft 41 as the center, so that the billet 2 held by the other end clamp head 53 can be placed at the center of the upper surface of the hammer forging worktable 1, that is, at the position below the forging equipment. Then, the forging equipment works to forge the cylindrical billet 2 into a flat round upsetting billet.

[0053] S2. Using the mold transfer mechanism 7, place the mold 6 at the center of the upper end of the upsetting blank 2 to pre-form the center hole. Specifically, after step S1, hold the handle box 54 and rotate the entire clamp assembly 5 180° with the central axis of the clamp main arm 51 as the rotation center (during rotation, the clamp assembly 5 can be separated from the blank 2 first, or it can remain in place; if it remains in place, it will cause the blank 2 to rotate 180°). When the clamp assembly 5 rotates, it will drive the first bevel gear 82 to rotate synchronously through the engagement between the key block 83 and the keyway disk 821. The first bevel gear 82 drives the gear shaft 84 and the first transmission wheel 842 at its bottom to rotate synchronously through the meshing connection between the first bevel gear 82 and the second bevel gear 841. The first transmission wheel 842 drives the second transmission wheel 86 and the driving wheel 87 to rotate synchronously through the transmission belt 85. The driving wheel 87 drives the driven wheel 88 to rotate at a reduced speed (only rotates 90°), thereby driving the entire mold transfer mechanism 7 to rotate 90°, so that the mold 6 is rotated above the blank 2. The forging head of the forging equipment presses the die 6 downward into the billet 2 to form a central punch. Then, the forging head rises to reset, and the reset spring 73 pushes the chuck mounting plate 74 upward through elastic thrust, thus moving the chuck 75 and the die 6 held by the chuck 75 upward, causing the die 6 to disengage from the punch in the billet 2. Subsequently, following the above operation, the clamp assembly 5 is released from the billet 2, and the clamp assembly 5 is rotated 180° to reset. The die 6 is then removed from the billet 2 by the die transfer mechanism 7, which rotates 90°.

[0054] S3. The billet 2 is flipped using the linkage mechanism 8, and the mold 6 is placed again using the mold transfer mechanism 7 to punch off the connecting skin at the other end of the billet 2. Specifically, as described in the above steps, the billet 2 is clamped again by the clamp assembly 5, and the key block 83 and the keyway plate 821 are also kept in the engaged state. According to the above operation, the billet 2 is rotated 180° and flipped over by the clamp assembly 5 (the hole punched in S2 faces downwards, and the connecting skin at the hole end faces upwards). At this time, the mold 6 is moved above the billet 2 again by the mold transfer mechanism 7 as described in S2. The forging head of the forging equipment descends, allowing the mold 6 to break through the connecting skin at the punching point of the billet 2, thus completing all punching operations.

[0055] S4. The die is forged on a forging machine using a special die. This part can be done using the traditional operation mode, and will not be described in detail here.

[0056] The above specific embodiments are merely several optional embodiments of this disclosure. Based on the technical solutions of this disclosure and the relevant teachings of the above embodiments, those skilled in the art can make various alternative improvements and combinations to the above specific embodiments.

Claims

1. A manufacturing process for duplex stainless steel valve covers, characterized in that, Includes the following steps: S1. Using an auxiliary forging device, the heated cylindrical billet (2) is placed on the hammer forging worktable (1) for upsetting. S2. Using an auxiliary forging device, place a mold (6) at the center of the upper end of the upsetting billet (2) to pre-form the center hole; S3. Use an auxiliary forging device to flip the billet (2) and remove the skin; S4. The die is used to forge the shape on a forging machine. The auxiliary forging device includes a clamp assembly (5), which includes a clamp main arm (51) and a clamp head (53) installed at the end of the clamp main arm (51) for clamping the billet (2); it also includes: Universal rotation mechanism (4), said universal rotation mechanism (4) is used to provide universal rotation of clamp assembly (5); The mold transfer mechanism (7) is fixedly connected to the mold (6) and drives the mold (6) to rotate above the blank (2); Linkage mechanism (8) combines the rotation of clamp assembly (5) with the rotation of mold transfer mechanism (7), so that mold transfer mechanism (7) automatically drives mold (6) to rotate and move. The universal rotating mechanism (4) includes a universal bushing (42), a universal shaft (43) that rotates universally with the universal bushing (42), and a cylinder (44) that is fixedly connected to the top of the universal shaft (43). The main arm (51) of the clamp is rotatably connected to the shaft (44). One end of the main arm (51) of the clamp is fixedly connected to the clamp head mounting box (52). There is a pair of clamp heads (53) and both are slidably connected to the clamp head mounting box (52). One end of the clamp head (53) is fixedly connected to a connecting plate (531) extending into the inside of the clamp head mounting box (52). The clamp assembly (5) also includes a pair of connecting rods (55) located in the clamp main arm (51) and a handle box (54) fixedly connected to the other end of the clamp main arm (51). One end of the connecting rod (55) extends into the clamp head mounting box (52) and is fixedly connected to the corresponding connecting plate (531). The other end of the connecting rod (55) extends into the handle box (54) and is fixedly connected to a spring plate (56). A second spring (57) is provided at both ends of the handle box (54). The second spring (57) is used to push the spring plate (56). A ring (58) is movably sleeved on both ends of the handle box (54). The two rings (58) are fixedly connected to the corresponding connecting rods (55) through a connecting short shaft (551). The cylindrical wall of the handle box (54) is provided with a guide groove (541) for the connecting short shaft (551) to move. The mold transfer mechanism (7) includes a connecting bar (71) that is rotatably connected to the hammer forging worktable (1) via a rotating column (78). One end of the upper surface of the connecting bar (71) is vertically elastically connected to a chuck mounting plate (74) via a guide shaft (72) and a return spring (73). One end of the chuck mounting plate (74) is locked with a pair of chucks (75) for clamping the mold (6). The linkage mechanism (8) includes a second fixed seat (81) fixed to the upper surface of the hammer forging workbench (1), a first bevel gear (82) is rotatably connected to the top of the second fixed seat (81), a keyway disk (821) is fixedly connected to one end of the first bevel gear (82) facing the clamp assembly (5), and a key block (83) that can be vertically inserted into the keyway disk (821) is fixedly connected to the outer wall of the handle box (54). The linkage mechanism (8) includes a gear shaft (84) rotatably connected to the hammer forging worktable (1). The top end of the gear shaft (84) is fixedly connected to a second bevel gear (841) that meshes with the first bevel gear (82). The bottom end of the gear shaft (84) is fixedly connected to a first transmission wheel (842). A gear set is rotatably connected inside one end of the hammer forging worktable (1). The gear set includes a second transmission wheel (86) and a driving wheel (87) that are coaxially fixedly connected. The second transmission wheel (86) is connected to the first transmission wheel (842) via a transmission belt (85). The bottom end of the rotating column (78) is fixedly connected to a driven wheel (88), and the driven wheel (88) meshes with the driving wheel (87).

2. The manufacturing process for the duplex stainless steel valve cover according to claim 1, characterized in that, The universal bushing (42) is fixedly connected to the rotating shaft (41) and rotatably connected to the first fixed seat (3) through the rotating shaft (41). The bottom end of the first fixed seat (3) is fixedly connected to the upper surface of the hammer forging workbench (1).

3. The manufacturing process for the duplex stainless steel valve cover according to claim 2, characterized in that, A guide rod (521) is fixedly connected between the inner walls of the two ends of the clamp head mounting box (52). The guide rod (521) is movably connected to the connecting plate (531), and both ends of the guide rod (521) are fitted with a first spring (522) for pushing the two clamp heads (53) closer to each other.

4. The manufacturing process for the duplex stainless steel valve cover according to claim 3, characterized in that, The bottom end of the guide shaft (72) is fixedly connected to the upper surface of the connecting strip (71), and the top end of the guide shaft (72) movably passes through the chuck mounting plate (74). The reset spring (73) is movably sleeved with the guide shaft (72) to push the chuck mounting plate (74) upward to reset.

5. The manufacturing process for the duplex stainless steel valve cover according to claim 4, characterized in that, One end of the chuck mounting plate (74) is fixedly connected to a fixing screw (76), which is movably connected to one end of the two chucks (75), and the fixing screw (76) is screwed to a nut (77) for pushing and locking the chucks (75).

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