Forging die for hubbed flange forge piece

Abstract

The invention discloses a forging die for hubbed flange forgings, and relates to the technical field of forging. Comprising a bottom plate and an extension plate, the extension plate is connected to the outside of the bottom plate, a motor box is mounted at the top of the extension plate, and a motor is arranged in the motor box; the connecting rod is installed at the top of the bottom plate, a top plate is installed at the top of the connecting rod, and a forging device is installed outside the top plate; the transfer mechanism is installed outside the motor box, the transfer mechanism comprises a clamping assembly, and the motor is used for controlling the clamping assembly to rotate so as to control the blanks in the clamping assembly to conduct feeding and discharging work; the backup plate is mounted at the top of the bottom plate, and a limiting mechanism is arranged outside the backup plate; and the first lifting rod is connected with the output end of the motor, a first connecting piece is installed at the top of the first lifting rod, and the purpose of improving the use efficiency of equipment is achieved through the forging die for the hubbed flange forgings.

Description

Technical Field

[0001] The present invention relates to the technical field of forging, and specifically to a forging die for a necked flange forging. Background Art

[0002] A necked flange is a common type of flange, also known as a winged flange or a long-neck flange. It is characterized by having a section of neck added to the periphery of the flange plate. After the metal blank is preheated in a furnace, the metal blank is placed into the lower die by means of a clamping device, and then the upper die moves downward under the control of a controller to impact on the metal blank. The metal blank deforms under the stamping of the upper die, and the number of stamping times of the upper die is between two and dozens of times. During each stamping process, the flange forging will undergo a certain amount of plastic deformation and stretching.

[0003] In the invention patent with the publication number of CN117000937A, a forging die for a necked flange forging is disclosed. By pressing the blank tightly in the cavity through a forging head, the situation of the blank jumping out of the die during the forging process can be avoided, thereby improving the stability of the blank during the forging process and enhancing the quality of the formed necked flange forging. However, when loading and unloading the high-temperature blank, workers need to hold tools to transfer the blank, the transfer work is difficult, and the placement position is difficult to calibrate. Summary of the Invention

[0004] To overcome the problem that when loading and unloading the high-temperature blank, workers need to hold tools to transfer the blank, the transfer work is difficult, and the placement position is difficult to calibrate, the present invention provides a forging die for a necked flange forging, including a bottom plate; An extension plate, the extension plate is connected to the outside of the bottom plate, a motor box is installed on the top of the extension plate, and a motor is arranged inside the motor box; A connecting rod, the connecting rod is installed on the top of the bottom plate, a top plate is installed on the top of the connecting rod, and a forging device is installed on the outside of the top plate; A transfer mechanism, the transfer mechanism is installed on the outside of the motor box, the transfer mechanism includes a clamping assembly, and the motor is used to control the rotation of the clamping assembly, thereby controlling the loading and unloading work of the blank inside the clamping assembly; A backing plate, the backing plate is installed on the top of the bottom plate, and a limiting mechanism is arranged on the outside of the backing plate.

[0005] Preferably, the transfer mechanism includes: A first lifting rod, the first lifting rod is connected to the output end of the motor, and a first connecting piece is installed on the top of the first lifting rod; A first push rod, the first push rod is installed on the outside of the first connecting piece; The first vertical plate, the first vertical plate is installed outside the first push rod, the first adjusting rod is installed outside the first vertical plate, and the first vertical plate is connected to the clamping assembly; The second vertical plate, the second vertical plate is installed outside the first adjusting rod.

[0006] Preferably, the clamping assembly includes: The second push rod, the second push rod is installed outside the first vertical plate, and the second push rod penetrates through the inside of the second vertical plate; The first fixing frame, the first fixing frame is installed outside the second push rod, and a first slider is slidably connected inside the first fixing frame.

[0007] Preferably, the clamping assembly further includes: The arc plate, the arc plate is installed outside the first slider, a clamping frame is installed outside the arc plate, the clamping frame is U-shaped, there are a plurality of clamping frames, and they are evenly arranged; The friction rod, the friction rod is installed inside the clamping frame, and the outer surface of the friction rod is rough.

[0008] Preferably, the clamping assembly further includes: The third push rod, the third push rod is installed inside the first fixing frame, a second connecting piece is sleeved outside the third push rod, and the third push rod is connected to the first slider; The telescopic rod, the telescopic rod is connected to the second connecting piece, and the telescopic rod is connected to the first slider.

[0009] Preferably, the limiting mechanism includes: The second fixing frame, the second fixing frame is installed outside the back plate, there are two second fixing frames, and they are symmetrically arranged; The second slider, the second slider is slidably connected inside the second fixing frame, and a clamping component is connected to the outside of the second slider; The fixing groove, the fixing groove is opened inside the bottom plate.

[0010] Preferably, the limiting mechanism further includes: The annular groove, the annular groove is opened at the bottom of the bottom plate; The second lifting rod, the second lifting rod is installed inside the annular groove, and an electric heating coil is installed at the bottom of the second lifting rod.

[0011] Preferably, the clamping component includes: The cross bar, the cross bar is installed outside the second slider, and a fourth push rod is installed at the bottom of the cross bar; The chassis, the chassis is installed at the bottom of the fourth push rod, a circular groove is opened in the middle of the chassis, and a channel is opened inside the chassis.

[0012] Preferably, the clamping component further includes: A lifting ring, which is slidably connected inside the chassis, and a connecting rod is installed at the bottom of the lifting ring; A lifting plate member, which is connected to the connecting rod, is installed inside the fixing groove, and a through groove is formed inside the lifting ring; A spring, which is installed inside the lifting ring, and a stop rod is installed at the top of the spring, and the stop rod is slidably connected inside the lifting ring.

[0013] The present invention provides a forging die for a necked flange forging. It has the following beneficial effects: For this forging die for a necked flange forging, by setting a transfer mechanism, the clamping component and the blank are controlled in terms of direction and height. When loading and unloading the high-temperature blank, it is necessary for workers to hold tools to transfer the blank, which is difficult for the transfer work and the placement position is difficult to calibrate. Therefore, a transfer mechanism is set to clamp and transport the blank. Driven by the rotating mechanism and the motor, the blank is controlled to complete the loading and unloading work, avoiding manual transportation of high-temperature blanks and at the same time avoiding the situation of inaccurate loading position caused by manual feeding.

[0014] For this forging die for a necked flange forging, by setting a transfer mechanism and a clamping component, the blank is clamped and transferred. By setting two upper and lower first fixing frames and two upper and lower arc plates in the clamping component, the blank at different heights is clamped and transferred, avoiding the situation of blank deflection caused by too high or too low clamping position.

[0015] For this forging die for a necked flange forging, by setting a limiting mechanism and a clamping component, the fixing groove is heated, and at the same time, the lower die is limited and protected. The electric heating coil is in the annular groove and contacts the fixing groove, and the heat is transferred to the fixing groove through the electric heating coil, thereby slowing down the cooling of the blank in the fixing groove. During the forging process, the stop rod is around the lower die and the blank, blocking the blank from deviating from the fixed position in the horizontal direction. In the vertical direction, since a spring is provided at the bottom of the stop rod, the stop rod can enter the lifting ring along with the spring, so it will not affect the movement of the forging head and the upper die, avoiding the situation that the blank deviates from the limitation of the lower die due to too low contact position between the blank and the lower die during multiple forging processes.

[0016] For this forging die for a necked flange forging, by setting a transfer mechanism and a limiting mechanism, the blank is clamped, transferred, limited and insulated. By using the transfer mechanism, it is convenient to clamp and transport high-temperature blanks at different heights to complete the loading and unloading work. By setting a limiting mechanism, the clamping component is used to limit the position of the lower die and the blank. Description of the Drawings

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the bottom structure of the present invention; Figure 3 is a schematic diagram of the transfer mechanism structure of the present invention; Figure 4 is a schematic diagram of the clamping assembly structure of the present invention; Figure 5 of the present invention Figure 4 is a schematic diagram of the structure at position A; Figure 6 of the present invention Figure 4 is a schematic diagram of the structure at position B; Figure 7 is a schematic diagram of the limiting mechanism structure of the present invention; Figure 8 is a schematic diagram of the bottom structure of the limiting mechanism of the present invention; Figure 9 is a schematic diagram of the clamping position component structure of the present invention; Figure 10 is a sectional view of the clamping position component of the present invention.

[0018] In the figure: 1, bottom plate; 2, connecting rod; 3, top plate; 4, extension plate; 5, motor box; 6, transfer mechanism; 601, first lifting rod; 602, first connecting piece; 603, first push rod; 604, first vertical plate; 605, first adjusting rod; 606, second vertical plate; 607, clamping assembly; 6071, second push rod; 6072, first fixing frame; 6073, first slider; 6074, arc plate; 6075, clamping position frame; 6076, friction rod; 6077, third push rod; 6078, second connecting piece; 6079, telescopic rod; 7, back plate; 8, limiting mechanism; 801, second fixing frame; 802, second slider; 8, 03 clamping position component; 8031, cross bar; 8032, fourth push rod; 8033, chassis; 8034, through groove; 8035, lifting ring; 8036, connecting rod; 8037, lifting plate member; 8038, spring; 8039, blocking rod; 804, fixing groove; 805, annular groove; 806, second lifting rod; 807, electric heating coil; 9, forging device. Detailed implementation manners

[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the present invention to the disclosed form. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles of the present invention and its practical applications, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments with various modifications suitable for specific purposes.

[0020] As Figures 1-10 shown, the present invention provides a technical solution: including a bottom plate 1; An extension plate 4, the extension plate 4 is connected to the outside of the bottom plate 1, and a motor box 5 is installed on the top of the extension plate 4, and a motor is arranged inside the motor box 5; A connecting rod 2, the connecting rod 2 is installed on the top of the bottom plate 1, a top plate 3 is installed on the top of the connecting rod 2, and a forging device 9 is installed on the outside of the top plate 3; A transfer mechanism 6, the transfer mechanism 6 is installed on the outside of the motor box 5, the transfer mechanism 6 includes a clamping assembly 607, and the motor is used to control the rotation of the clamping assembly 607, so as to control the blank in the clamping assembly 607 to perform loading and unloading operations; A backing plate 7, the backing plate 7 is installed on the top of the bottom plate 1, and a limiting mechanism 8 is arranged on the outside of the backing plate 7.

[0021] Before using the equipment, start the motor in the motor box 5, the motor controls the transfer mechanism 6 to rotate away from the equipment, the transfer mechanism 6 is on the workbench for placing the heated blank, adjust the transfer mechanism 6, and the transfer mechanism 6 clamps and fixes the blank. Then adjust the motor and the transfer mechanism 6 to gradually move the blank into the lower die in the limiting mechanism 8 to complete the feeding work of the blank. Then adjust the limiting mechanism 8 to control the height of the blank, start the forging device 9, and the forging device 9 drives the forging head and the upper die to move to forge the blank. After the forging work is completed, adjust the limiting mechanism 8 and the transfer mechanism 6 to perform the blanking and transfer work on the forged blank.

[0022] The transfer mechanism 6 includes: A first lifting rod 601, the first lifting rod 601 is connected to the output end of the motor, a first connecting member 602 is installed on the top of the first lifting rod 601, and the first connecting member 602 is set as a welded part of a circular plate and a fixed rod; A first push rod 603, the first push rod 603 is installed on the outside of the first connecting member 602; A first vertical plate 604, the first vertical plate 604 is installed on the outside of the first push rod 603, a first adjusting rod 605 is installed on the outside of the first vertical plate 604, and the first vertical plate 604 is connected to the clamping assembly 607; The second vertical plate 606 is installed outside the first adjusting rod 605.

[0023] According to the height and position of the billet on the workbench after heating, adjust the stroke of the first lifting rod 601 and the first push rod 603, and then adjust the clamping assembly 607 to clamp and transport the billet.

[0024] With the start of the motor, the motor drives the first lifting rod 601, the first connecting piece 602, the first push rod 603, the first vertical plate 604, the first adjusting rod 605, the second vertical plate 606 and the clamping assembly 607 to rotate, thereby driving the billet in the clamping assembly 607 to rotate. Then turn on the first push rod 603, and the first push rod 603 drives the clamping assembly 607 to move, and the clamping assembly 607 and the billet gradually move directly above the lower die. Adjust the limiting mechanism 8, the lower die gradually contacts the billet, and adjust the clamping assembly 607 to release the billet.

[0025] After forging, repeat the above actions to make the clamping assembly 607 directly above the processed billet, adjust the limiting mechanism 8 and the clamping assembly 607 to complete the demoulding work of the billet, and then adjust the first push rod 603 to the initial state, and drive the clamping assembly 607 and the billet to rotate by the motor to complete the blanking work of the billet.

[0026] By setting the rotating mechanism, the direction and height of the clamping assembly 607 and the billet are controlled. The temperature of the billet after heating is too high. By setting the clamping assembly 607 to clamp the billet, under the drive of the rotating mechanism and the motor, the billet is controlled to complete the loading and unloading work, avoiding manual transportation of high-temperature billets and avoiding inaccurate loading positions caused by manual feeding.

[0027] The clamping assembly 607 includes: The second push rod 6071 is installed outside the first vertical plate 604, and the second push rod 6071 penetrates through the inside of the second vertical plate 606; The first fixing frame 6072 is installed outside the second push rod 6071. A first slider 6073 is slidably connected inside the first fixing frame 6072. Both the second push rod 6071 and the first fixing frame 6072 are provided with four. The two upper first fixing frames 6072 are in a group, and the two lower first fixing frames 6072 are in another group. Each first fixing frame 6072 is provided with two sliders; The arc-shaped plate 6074 is installed outside the first slider 6073. A clamping frame 6075 is installed outside the arc-shaped plate 6074. The clamping frame 6075 is set in a U shape. There are multiple clamping frames 6075 and they are evenly arranged; The friction rod 6076 is installed inside the clamping frame 6075, and the outer surface of the friction rod 6076 is rough. The third push rod 6077 is installed inside the first fixed frame 6072. A second connecting piece 6078 is sleeved outside the third push rod 6077. The second connecting piece 6078 is set as a welded part of two outer rings and a vertical rod. The third push rod 6077 is connected to the first slider 6073. Two third push rods 6077 are arranged in each first fixed frame 6072, and each third push rod 6077 controls the positions of the upper and lower first sliders 6073 in a group of first fixed frames 6072. The telescopic rod 6079 is connected to the second connecting piece 6078 and is also connected to the first slider 6073.

[0028] Before clamping the blank, according to the height of the blank, two upper second push rods 6071 or two lower second push rods 6071 are opened. The two second push rods 6071 drive the two first fixed frames 6072 to move away from the second vertical plate 606. Then, the two third push rods 6077 in the two first fixed frames 6072 are opened. The third push rods 6077 drive the two first sliders 6073, the two second connecting pieces 6078, and the two first sliders 6073 connected by the two second connecting pieces 6078 to move, thereby driving the four arc-shaped plates 6074 to move towards the middle. The friction rods 6076 outside the four arc-shaped plates 6074 gradually come into contact with the outer surface of the blank until the blank is clamped and fixed.

[0029] When it is necessary to release the blank, the two third push rods 6077 are adjusted to the initial state, and the first friction rod 6076 gradually moves away from the blank, thereby releasing the blank.

[0030] By setting the transfer mechanism 6 and the clamping assembly 607, the blank is clamped and transferred. Two sets of upper and lower first fixed frames 6072 and two sets of upper and lower arc-shaped plates 6074 are arranged in the clamping assembly 607 to clamp and transfer blanks of different heights, avoiding the situation where the blank deflects due to too high or too low clamping position.

[0031] The limiting mechanism 8 includes: The second fixed frame 801 is installed outside the backing plate 7. There are two second fixed frames 801, and they are symmetrically arranged. The second slider 802 is internally provided with a power system. The second slider 802 is slidably connected inside the second fixed frame 801, and a clamping component 803 is connected to the outside of the second slider 802. The fixed slot 804 is opened inside the bottom plate 1. The annular groove 805 is opened at the bottom of the bottom plate 1; The second lifting rod 806 is installed inside the annular groove 805, and an electric heating coil 807 is installed at the bottom of the second lifting rod 806.

[0032] Before using the equipment, the second lifting rod 806 is in the initial state. At this time, the electric heating coil 807 is inside the annular groove 805, transferring heat to the fixing groove 804, playing a role in slowing down the cooling of the blank. Adjust the positioning component 803, place the lower die in the positioning component 803. As the clamping component 607 releases the blank into the lower die, adjust the positioning component 803 to protect the circumference of the lower die.

[0033] Subsequently, by adjusting the power system in the second slider 802, adjust the height of the second slider 802 inside the second fixed frame 801, and then adjust the height of the positioning component 803 to make the lower die in the fixing groove 804.

[0034] The positioning component 803 includes: The cross bar 8031 is installed outside the second slider 802, and a fourth push rod 8032 is installed at the bottom of the cross bar 8031; The chassis 8033 is installed at the bottom of the fourth push rod 8032. A circular groove is opened in the middle of the chassis 8033. A suction strip is arranged inside the circular groove, and a channel is opened inside the chassis 8033; The lifting ring 8035 is slidably connected inside the channel. A connecting rod 8036 is installed at the bottom of the lifting ring 8035; The lifting plate member 8037 is connected to the connecting rod 8036. The lifting plate member 8037 is installed inside the fixing groove 804. A through groove 8034 is opened inside the lifting ring 8035. The lifting plate member 8037 is set as a connecting member of the flat plate and the push rod; The spring 8038 is installed inside the lifting ring 8035. A stop rod 8039 is installed at the top of the spring 8038. The stop rod 8039 is slidably connected inside the lifting ring 8035.

[0035] Before using the equipment, the lifting plate member 8037 is in the open state. At this time, the lifting ring 8035 is in the chassis 8033. Manually place the lower die on the chassis 8033. The lower die is in the middle of the lifting ring 8035. Manually press the lower die to make the lower die suck and fix with the suction strip in the circular groove, thereby fixing the position of the lower die.

[0036] During the forging process, the shift lever 8039 is located around the lower die and the blank, blocking the blank from deviating from the fixed position in the horizontal direction. In the vertical direction, due to the spring 8038 provided at the bottom of the shift lever 8039, the shift lever 8039 can follow the spring 8038 into the lifting ring 8035, so it will not affect the movement of the forging head and the upper die.

[0037] After the forging work is completed, by adjusting the power system in the second slider 802, the second slider 802 drives the clamping component 803 to move upward, the lifting ring 8035 is separated from the chassis 8033, and the blank is controlled by the clamping component 607 to be separated from the lower die, while the lower die remains fixedly engaged with the suction bar.

[0038] Working principle: Before using the equipment, turn on the motor in the motor box 5. The motor controls the transfer mechanism 6 to rotate in a direction away from the equipment. The transfer mechanism 6 is placed on the workbench for placing the heated blank. Adjust the transfer mechanism 6, and the transfer mechanism 6 clamps and fixes the blank. The second lifting rod 806 is in the initial state. At this time, the electric heating coil 807 is in the annular groove 805, transferring heat to the fixed groove 804. The lifting plate member 8037 is in the open state. At this time, the lifting ring 8035 is in the chassis 8033. Manually place the lower die on the chassis 8033. The lower die is in the middle of the lifting ring 8035. Manually press the lower die to make the lower die fixedly engaged with the suction bar in the circular groove, thereby fixing the position of the lower die.

[0039] According to the height and position of the heated blank on the workbench, adjust the stroke of the first lifting rod 601 and the first push rod 603, and then adjust the clamping component 607 to perform the clamping and transportation work on the blank.

[0040] Before clamping the blank, according to the height of the blank, turn on the two second push rods 6071 above or the two second push rods 6071 below. The two second push rods 6071 drive the two first fixed frames 6072 to move in a direction away from the second vertical plate 606. Turn on the two third push rods 6077 in the two first fixed frames 6072. The third push rods 6077 drive the two first sliders 6073, the two second connecting members 6078, and the two first sliders 6073 connected by the two second connecting members 6078 to move, thereby driving the four arc-shaped plates 6074 to move towards the middle. The friction rods 6076 outside the four arc-shaped plates 6074 gradually come into contact with the outer surface of the blank until the blank is clamped and fixed.

[0041] As the motor starts, it drives the first lifting rod 601, first connecting member 602, first push rod 603, first vertical plate 604, first adjustment rod 605, second vertical plate 606, and clamping assembly 607 to rotate, thereby driving the blank in clamping assembly 607 to rotate. The first push rod 603 is then activated, driving the clamping assembly 607 to move, gradually positioning the clamping assembly 607 and the blank directly above the lower die. The limiter mechanism 8 is adjusted, gradually bringing the lower die into contact with the blank. The clamping assembly 607 is then adjusted, and the two third push rods 6077 are adjusted to their initial positions. The first friction rod 6076 gradually moves away from the blank, releasing the blank.

[0042] The locking assembly 803 is adjusted to place the lower die within it. As the clamping assembly 607 releases the blank into the lower die, the locking assembly 803 is adjusted to protect the lower die around its perimeter. The power system in the second slide 802 is then adjusted to adjust its height within the second fixing frame 801, thereby adjusting the height of the locking assembly 803 to position the lower die within the fixing slot 804.

[0043] The forge 9 is turned on, and the forging head and upper die are driven downward by the forging device 9 to forge the blank. During the forging process, the stopper 8039 is located around the lower die and the blank, horizontally preventing the blank from moving away from the fixed position. In the vertical direction, due to the spring 8038 provided at the bottom of the stopper 8039, the stopper 8039 can follow the spring 8038 into the lifting ring 8035, so as not to affect the movement of the forging head and upper die.

[0044] After forging is complete, the above steps are repeated until the clamping assembly 607 is positioned directly above the processed blank. By adjusting the power system in the second slide 802, the second slide 802 drives the positioning assembly 803 upward, separating the lifting ring 8035 from the base 8033. The clamping assembly 607 then controls the blank's release from the lower die, while the lower die remains secured to the suction bar. The first push rod 603 is then adjusted to its initial position, and the motor drives the clamping assembly 607 and the blank to rotate, completing the blank unloading process.

[0045] Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without making creative efforts should fall within the scope of protection of the present invention. Structures, devices, and operating methods not specifically described and explained in the present invention shall be implemented in accordance with conventional means in the field unless otherwise specified or limited.

Claims

1. A forging die for a necked flange forging, comprising a bottom plate (1), characterized in that: An extension plate (4), the extension plate (4) is connected to the outside of the bottom plate (1), a motor box (5) is installed on the top of the extension plate (4), and a motor is arranged inside the motor box (5); A connecting rod (2), the connecting rod (2) is installed on the top of the bottom plate (1), a top plate (3) is installed on the top of the connecting rod (2), and a forging device (9) is installed on the outside of the top plate (3); A transfer mechanism (6), the transfer mechanism (6) is installed on the outside of the motor box (5), the transfer mechanism (6) includes a clamping assembly (607), and the motor is used to control the rotation of the clamping assembly (607), so as to control the loading and unloading of the blank in the clamping assembly (607); A backing plate (7), the backing plate (7) is installed on the top of the bottom plate (1), and a limiting mechanism (8) is arranged on the outside of the backing plate (7).

2. The forging die for a necked flange forging according to claim 1, characterized in that: The transfer mechanism (6) includes: A first lifting rod (601), the first lifting rod (601) is connected to the output end of the motor, and a first connecting part (602) is installed on the top of the first lifting rod (601); A first push rod (603), the first push rod (603) is installed on the outside of the first connecting part (602); A first vertical plate (604), the first vertical plate (604) is installed on the outside of the first push rod (603), a first adjusting rod (605) is installed on the outside of the first vertical plate (604), and the first vertical plate (604) is connected to the clamping assembly (607); A second vertical plate (606), the second vertical plate (606) is installed on the outside of the first adjusting rod (605).

3. The forging die for a necked flange forging according to claim 2, characterized in that: The clamping assembly (607) includes: A second push rod (6071), the second push rod (6071) is installed on the outside of the first vertical plate (604), and the second push rod (6071) penetrates through the inside of the second vertical plate (606); A first fixing frame (6072), the first fixing frame (6072) is installed on the outside of the second push rod (6071), and a first slider (6073) is slidably connected inside the first fixing frame (6072).

4. The forging die for a necked flange forging according to claim 3, characterized in that: The clamping assembly (607) further includes: An arc plate (6074), the arc plate (6074) is installed on the outside of the first slider (6073), a clamping frame (6075) is installed on the outside of the arc plate (6074), the clamping frame (6075) is U-shaped, there are a plurality of clamping frames (6075), and they are evenly arranged; A friction rod (6076), the friction rod (6076) is installed inside the clamping frame (6075), and the outer surface of the friction rod (6076) is rough.

5. The forging die for a necked flange forging according to claim 4, characterized in that: The clamping assembly (607) further includes: A third push rod (6077), the third push rod (6077) is installed inside the first fixed frame (6072), a second connecting member (6078) is sleeved outside the third push rod (6077), and the third push rod (6077) is connected to the first slider (6073); A telescopic rod (6079), the telescopic rod (6079) is connected to the second connecting member (6078), and the telescopic rod (6079) is connected to the first slider (6073).

6. The forging die for a necked flange forging according to claim 1, wherein: The limiting mechanism (8) includes: A second fixed frame (801), the second fixed frame (801) is installed outside the backing plate (7), there are two second fixed frames (801), and they are symmetrically arranged; A second slider (802), the second slider (802) is slidably connected inside the second fixed frame (801), and a clamping position component (803) is connected to the outside of the second slider (802); A fixed groove (804), the fixed groove (804) is opened inside the bottom plate (1).

7. The forging die for a necked flange forging according to claim 6, wherein: The limiting mechanism (8) further includes: An annular groove (805), the annular groove (805) is opened at the bottom of the bottom plate (1); A second lifting rod (806), the second lifting rod (806) is installed inside the annular groove (805), and an electric heating coil (807) is installed at the bottom of the second lifting rod (806).

8. The forging die for a necked flange forging according to claim 6, wherein: The clamping position component (803) includes: A cross bar (8031), the cross bar (8031) is installed outside the second slider (802), and a fourth push rod (8032) is installed at the bottom of the cross bar (8031); A chassis (8033), the chassis (8033) is installed at the bottom of the fourth push rod (8032), a circular groove is opened in the middle of the chassis (8033), and a channel is opened inside the chassis (8033).

9. The forging die for a necked flange forging according to claim 8, wherein: The clamping position component (803) further includes: A lifting ring (8035), the lifting ring (8035) is slidably connected inside the chassis (8033), and a connecting rod (8036) is installed at the bottom of the lifting ring (8035); A lifting plate member (8037), the lifting plate member (8037) is connected to the connecting rod (8036), the lifting plate member (8037) is installed inside the fixed groove (804), and a through groove (8034) is opened inside the lifting ring (8035); A spring (8038), the spring (8038) is installed inside the lifting ring (8035), a stop rod (8039) is installed at the top of the spring (8038), and the stop rod (8039) is slidably connected inside the lifting ring (8035).

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