A die locking device for reverse extrusion swaging and method of use

Abstract

The application discloses a die locking device for counter extrusion die forging and a use method, and belongs to the technical field of die locking devices. The die locking device comprises an extrusion backing plate, a plurality of guide columns are arranged at the upper end of the extrusion backing plate at intervals, a first U-shaped key mounting hole is arranged on the guide column, a first U-shaped key is arranged in the first U-shaped key mounting hole, one end of the first U-shaped key is provided with a push-pull cylinder, and the other end of the first U-shaped key is provided with a dismounting cylinder. A supporting seat is arranged at the upper end of the extrusion backing plate, the supporting seat is sleeved on the guide column, and the two ends of the first U-shaped key pass through the supporting seat. A lifting cylinder is further arranged on the extrusion backing plate, and the output end of the lifting cylinder is connected with the supporting seat. The locking effect is good, the die can be effectively prevented from moving, force can be dispersed and transmitted to the backing plate, and the uniform stress is ensured.

Description

Technical Field

[0001] This invention belongs to the technical field of mold locking devices, specifically relating to a mold locking device and its usage method for reverse extrusion forging. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] In the die forging reverse extrusion process, the strong reverse flow of metal generated during billet extrusion will create a huge force, which can easily cause displacement of the extrusion die. The stability and fixation of the die directly determines the extrusion effect, thus placing core requirements on the locking performance of the die clamping device. Currently, although there are locking devices suitable for the forging field, the dedicated models for the reverse extrusion process have certain performance problems and are difficult to match the process requirements: First, the core locking capacity is seriously insufficient. The structural design of the existing devices cannot adapt to the instantaneous impact force generated by the metal flow during the reverse extrusion process, and cannot provide a continuous and sufficient clamping force. The mold displacement phenomenon occurs frequently, which directly leads to a decrease in the forming accuracy of the billet, an increase in the scrap rate, and even interruption of the forming operation. Second, the force transmission and distribution mechanism is unreasonable. Due to the design defects of the locking structure, the load borne by the mold is difficult to be evenly distributed to the extrusion pad through the device. The problem of local stress concentration is prominent, which not only accelerates the wear of the mold edge and shortens its service life, but also causes additional stress damage to the equipment, significantly increasing the frequency and cost of equipment maintenance. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a die locking device and method for reverse extrusion forging, which has a good locking effect and can effectively prevent die movement; it can also distribute the force to the pad plate to ensure uniform force distribution.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A die locking device for reverse extrusion forging includes an extrusion pad, a plurality of guide posts spaced apart on the upper end of the extrusion pad, a first U-shaped key mounting hole provided on the guide post, a first U-shaped key provided in the first U-shaped key mounting hole, a push-pull cylinder provided at one end of the first U-shaped key, and a retraction cylinder provided at the other end of the first U-shaped key; a support seat provided on the upper end of the extrusion pad, the support seat being sleeved on the guide posts, and both ends of the first U-shaped key passing through the support seat; a lifting cylinder is also provided on the extrusion pad, and the output end of the lifting cylinder is connected to the support seat.

[0006] As a further technical solution, the support base is provided with a plurality of first mounting holes at intervals, and mounting plates are provided at both ends of the first mounting holes, and second mounting holes are provided on the mounting plates.

[0007] As a further technical solution, the first mounting hole is a circular hole, and the guide post passes through the first mounting hole on the mounting base; the second mounting hole is an oblong hole, and the two ends of the first U-shaped key pass through the second mounting hole of the support base.

[0008] As a further technical solution, one end of the first U-shaped key is connected to the unloading cylinder, and the other end of the first U-shaped key is connected to the push-pull cylinder, so that the first U-shaped key can be moved by the unloading cylinder and the push-pull cylinder.

[0009] As a further technical solution, protective covers are provided at both ends of the support base, the protective covers are connected to the support base, and a retraction cylinder and a push-pull cylinder are provided inside the protective cover, with the output ends of the retraction cylinder and the push-pull cylinder extending out of the protective cover.

[0010] As a further technical solution, a cylindrical pin is provided on the side of the support base, and several cylindrical pins are provided at intervals, and the cylindrical pins are detachably connected to the support base.

[0011] As a further technical solution, several lifting cylinders are arranged at intervals, the lower part of the lifting cylinder is connected to the support base, and the lifting cylinder drives the support base to move.

[0012] As a further technical solution, a displacement sensor is installed at the corner of the support base. The displacement sensor is electrically connected to the controller. The controller is also electrically connected to the lifting cylinder, the unloading cylinder, the push-pull cylinder, and the hydraulic station power source. The hydraulic station power source is connected to the lifting cylinder, the unloading cylinder, and the push-pull cylinder.

[0013] As a further technical solution, a support sleeve is provided on the upper part of the support base, and a plurality of second U-shaped key mounting holes are provided at intervals on the side of the support sleeve, and a second U-shaped key is provided in the second U-shaped key mounting hole; an extrusion mold is provided on the upper part of the support sleeve.

[0014] A method of using a die locking device for reverse extrusion forging includes the following steps: The extrusion die is installed on the upper part of the support sleeve, and is connected and fixed to the die through the second U-shaped key and cylindrical pin on the side of the support sleeve, so as to achieve the initial connection between the die and the locking device. The controller activates the push-pull cylinder, which pushes the first U-shaped key to move along the first U-shaped key mounting hole of the guide post, so that both ends of the first U-shaped key pass through the second mounting hole of the support seat, forming a tight positional constraint with the guide post and the support seat, thus completing the mechanical locking of the mold by the locking device; the displacement sensors at the four corners monitor the position status of the support sleeve and the mold to ensure that the mold does not deviate and that the first U-shaped key is properly engaged with each component; The controller commands the lifting cylinder to move, which drives the support sleeve and the fixed mold to move up and down synchronously. The displacement sensor provides real-time feedback of position information to ensure horizontal synchronization during the lifting process. During the extrusion of the blank by the punch, the reverse flow force generated by the blank is transmitted to the support sleeve and support base through the extrusion mold, the second U-shaped key and the cylindrical pin in sequence, and then transmitted to the guide column through the first U-shaped key, and finally distributed to the extrusion pad to achieve uniform load bearing. After the punch rises and completes the extrusion, the controller synchronously starts the unloading cylinder and the push-pull cylinder. The unloading cylinder and the push-pull cylinder work together to pull the first U-shaped key out of the mating hole between the guide post and the support seat, thus releasing the position constraint.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: This invention, through the cooperation of the guide post, the first U-shaped key, and the support base, can form constraints at multiple positions. Combined with the drive locking of the push-pull cylinder, it can provide a stable clamping force, resisting mold displacement during extrusion and reducing the risk of blank forming failure. Simultaneously, the first U-shaped key mates with the first U-shaped key mounting hole on the guide post, and the first and second mounting holes on the support base, ensuring a stable and secure connection. The second U-shaped key and cylindrical pin on the support sleeve provide initial fixation between the mold and the support sleeve, further guaranteeing the locking effect. This prevents loosening after prolonged exposure to alternating loads, effectively preventing mold displacement and ensuring forming accuracy. In this invention, during the extrusion of the blank by the punch, the reverse flow force generated by the blank is sequentially transmitted through the extrusion die, the second U-shaped key, and the cylindrical pin to the support sleeve and support base, then transmitted to the guide post via the first U-shaped key, and finally distributed to the extrusion pad, achieving uniform load bearing. The concentrated load generated by the back extrusion is gradually dispersed through the synergistic action of multiple components, effectively avoiding the problem of localized stress concentration in the die and device. Through the large-area connection between the guide post and the extrusion pad, the final load is uniformly transferred to the pad, extending the service life of the die and support sleeve, and reducing damage to the pad and surrounding equipment. Attached Figure Description

[0016] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0017] Figure 1 This is a schematic diagram of the structure of the die locking device for reverse extrusion forging according to the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the die locking device for reverse extrusion forging according to the present invention. Figure 2 ; Figure 3This is a schematic diagram of the structure of the die locking device for reverse extrusion forging according to the present invention. Figure 3 ; In the diagram: 1. Extrusion pad; 2. Lifting cylinder; 3. Guide column; 4. First U-shaped key; 5. Protective cover; 6. Cylindrical pin; 7. Support base; 8. Unloading cylinder; 9. Push-pull cylinder; 10. Support sleeve; 11. Second U-shaped key; 12. Extrusion die; 13. Mounting plate; 14. First mounting hole; 15. Second mounting hole; 16. First U-shaped key mounting hole; 17. Second U-shaped key mounting hole. Detailed Implementation

[0018] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0019] Currently, although there are locking devices suitable for the forging field, the dedicated models for the reverse extrusion process have certain performance problems and are difficult to match the process requirements: First, the core locking capacity is seriously insufficient. The structural design of the existing devices cannot adapt to the instantaneous impact force generated by the metal flow during the reverse extrusion process, and cannot provide a continuous and sufficient clamping force. The mold displacement phenomenon occurs frequently, which directly leads to a decrease in the forming accuracy of the billet, an increase in the scrap rate, and even interruption of the forming operation. Second, the force transmission and distribution mechanism is unreasonable. Due to the design defects of the locking structure, the load borne by the mold is difficult to be evenly distributed to the extrusion pad through the device. The problem of local stress concentration is prominent, which not only accelerates the wear of the mold edge and shortens its service life, but also causes additional stress damage to the equipment, significantly increasing the frequency and cost of equipment maintenance.

[0020] Example 1: The present invention will now be described in detail with reference to the accompanying drawings. This embodiment discloses a die locking device for reverse extrusion forging, such as... Figure 1 As shown, the device includes a pressing pad, with several guide posts 3 spaced apart at the upper end of the pressing pad. The guide posts 3 are provided with first U-shaped key mounting holes 16, and first U-shaped keys 4 are provided in the first U-shaped key mounting holes 16. A push-pull cylinder 9 is provided at one end of the first U-shaped key 4, and a retraction cylinder 8 is provided at the other end of the first U-shaped key 4. A support seat 7 is provided at the upper end of the pressing pad 1, and the support seat 7 is sleeved on the guide posts 3. Both ends of the first U-shaped keys 4 pass through the support seat 7. A lifting cylinder 2 is also provided on the pressing pad 1, and the output end of the lifting cylinder 2 is connected to the support seat 7.

[0021] Specifically, the guide post 3, the first U-shaped key 4, and the support base 7 work together to form constraints at multiple positions. Combined with the drive locking of the push-pull cylinder 9, this provides a stable clamping force, resisting mold displacement during extrusion and reducing the risk of blank forming failure. Simultaneously, the first U-shaped key 4 engages with the first U-shaped key mounting hole 16 on the guide post 3, and the first mounting hole 14 and second mounting hole 15 on the support base 7, ensuring a stable and secure connection. The second U-shaped key 11 and cylindrical pin 6 on the support sleeve 10 provide initial fixation between the mold and the support sleeve 10, further guaranteeing the locking effect. This prevents loosening after prolonged exposure to alternating loads, effectively preventing mold displacement and ensuring forming accuracy.

[0022] During the extrusion of the blank by the punch, the reverse flow force generated by the blank is transmitted sequentially through the extrusion die 12, the second U-shaped key 11, and the cylindrical pin 6 to the support sleeve 10 and the support base 7, and then through the first U-shaped key 4 to the guide post 3, and finally distributed to the extrusion pad 1, achieving uniform load bearing. The concentrated load generated by the back extrusion is gradually dispersed through the synergistic action of multiple components, effectively avoiding the problem of localized stress concentration in the die and device. Through the large-area connection between the guide post 3 and the extrusion pad 1, the final load is evenly transferred to the pad, extending the service life of the die and the support sleeve 10, and reducing damage to the pad and surrounding equipment.

[0023] The support base 7 has several first mounting holes 14 spaced apart. Mounting plates 13 are provided at both ends of the first mounting holes 14, and second mounting holes 15 are provided on the mounting plates 13. The first mounting holes 14 are circular, and the guide post 3 passes through the first mounting holes 14 on the support base. The second mounting holes 15 are oblong, and both ends of the first U-shaped key 4 pass through the second mounting holes 15 on the support base 7. One end of the first U-shaped key 4 is connected to the unloading cylinder 8, and the other end is connected to the push-pull cylinder 9. The unloading cylinder 8 and the push-pull cylinder 9 drive the first U-shaped key 4 to move.

[0024] Specifically, the first mounting hole 14 adopts a circular hole design. During assembly, the guide post 3 passes through the circular first mounting hole 14 on the support base 7 from top to bottom, so that the guide post 3 and the support base 7 form a relatively sliding fit relationship. The second mounting hole 15 adopts an oblong hole design. The two ends of the first U-shaped key pass through the oblong second mounting holes 15 on the mounting plates 13 on both sides of the support base 7, and one end of the first U-shaped key is fixed to the output end of the unloading cylinder 8 through a connector, and the other end is connected to the output end of the push-pull cylinder 9.

[0025] When the position of the first U-shaped key needs to be adjusted, the controller instructs the hydraulic station power source to drive the unloading cylinder 8 and the push-pull cylinder 9 to work together. The two apply pushing and pulling forces from both ends respectively, causing the first U-shaped key to move smoothly along the extension direction of the elongated second mounting hole 15, so as to achieve contact or separation with the guide post 3.

[0026] Protective covers 5 are provided at both ends of the support base 7. The protective covers 5 are connected to the support base 7. The unloading cylinder 8 and the push-pull cylinder 9 are provided inside the protective cover 5. The output ends of the unloading cylinder 8 and the push-pull cylinder 9 extend out of the protective cover 5.

[0027] Specifically, at both ends of the support base 7, the protective cover 5 is fixedly connected to the end face of the support base 7 by bolts. The protective cover 5 adopts a closed shell structure, with reserved installation space inside to accommodate the unloading cylinder 8 and the push-pull cylinder 9. During assembly, the unloading cylinder 8 and the push-pull cylinder 9 are horizontally fixed inside the protective cover 5. The protective cover 5 has through holes at the corresponding output ends. After the output ends of the unloading cylinder 8 and the push-pull cylinder 9 pass through the through holes, they are connected to the first U-shaped key on the support base 7. During the operation of the device, the protective cover 5 can prevent metal debris, coolant, and other impurities generated by the reverse extrusion operation from entering the cylinder body, avoiding piston jamming or component corrosion, and ensuring the stable operation of the unloading cylinder 8 and the push-pull cylinder 9.

[0028] Cylindrical pins 6 are provided on the side of the support base 7, and several cylindrical pins 6 are spaced apart. The cylindrical pins 6 are detachably connected to the support base 7. Several lifting cylinders 2 are spaced apart. The lower part of the lifting cylinder 2 is connected to the support base 7, and the lifting cylinder 2 drives the support base 7 to move.

[0029] Specifically, the installation position of the cylindrical pin 6 is adjusted according to the size of the extrusion die 12 so that the end of the cylindrical pin 6 can fit tightly against the outer wall of the support sleeve 10.

[0030] Meanwhile, several lifting cylinders 2 are arranged circumferentially at intervals at the bottom of the support base 7. The lower cylinder body of the lifting cylinder 2 is fixed to the bottom structure of the support base 7 through a flange, and the output end of the lifting cylinder 2 is connected to the extrusion pad 1 below. When it is necessary to adjust the height of the support base 7, the controller controls the hydraulic station to supply oil to the lifting cylinder 2. The output end of the lifting cylinder 2 extends and retracts, driving the support base 7 and the upper support sleeve 10 and mold to rise and fall synchronously, adapting to different extrusion process requirements.

[0031] A displacement sensor is installed at the corner of the support base 7. The displacement sensor is electrically connected to the controller. The controller is also electrically connected to the lifting cylinder 2, the unloading cylinder 8, the push-pull cylinder 9, and the hydraulic station power source. The hydraulic station power source is connected to the lifting cylinder 2, the unloading cylinder 8, and the push-pull cylinder 9.

[0032] Specifically, the displacement sensor is electrically connected to the controller via wires, enabling it to collect real-time data on the position and lifting speed of the support base 7 and transmit the signals to the controller. Simultaneously, the controller is also connected via wires to the control valves of the lifting cylinder 2, the unloading cylinder 8, and the push-pull cylinder 9, as well as the hydraulic power source. The hydraulic power source is connected to the inlet and outlet ports of each cylinder via hydraulic pipelines. When the displacement sensor detects tilting of the support base 7 during lifting, the controller immediately adjusts the oil supply from the hydraulic station to the lifting cylinders 2 at different positions to correct the horizontal state of the support base 7 and ensure the accuracy of equipment operation.

[0033] A support sleeve 10 is provided on the upper part of the support base 7. Several second U-shaped key mounting holes 17 are provided at intervals on the side of the support sleeve 10. A second U-shaped key 11 is provided in the second U-shaped key mounting holes 17. An extrusion mold 12 is provided on the upper part of the support sleeve 10.

[0034] Specifically, the side of the support sleeve 10 is machined with several second U-shaped key mounting holes at intervals along the circumferential direction. Each mounting hole is embedded with a second U-shaped key 11. One end of the second U-shaped key 11 extends into the support sleeve 10, and the other end protrudes from the outer wall of the sleeve.

[0035] When assembling the extrusion die 12, the die is placed into the internal cavity of the support sleeve 10 from top to bottom. The die is rotated so that the groove on the side wall of the die aligns with the second U-shaped key 11 on the side of the support sleeve 10. The second U-shaped key 11 engages with the groove of the die, achieving quick positioning and fixation of the die and the support sleeve 10. The locking device is connected to the die through the second U-shaped key 11 and the cylindrical pin 6 to prevent the die from moving.

[0036] Example 2: A method of using a die locking device for reverse extrusion forging includes the following steps: The extrusion die 12 is installed on the upper part of the support sleeve 10, and is connected and fixed to the die through the second U-shaped key 11 and cylindrical pin 6 on the side of the support sleeve 10, so as to achieve the initial connection between the die and the locking device. The controller activates the push-pull cylinder 9, which pushes the first U-shaped key 4 to move along the first U-shaped key mounting hole of the guide post 3, so that both ends of the first U-shaped key pass through the second mounting hole 15 of the support base 7, forming a tight positional constraint with the guide post 3 and the support base 7, thus completing the mechanical locking of the mold by the locking device; the displacement sensors at the four corners monitor the position status of the support sleeve 10 and the mold to ensure that the mold does not deviate and that the first U-shaped key is properly engaged with each component; The controller commands the lifting cylinder 2 to move, which drives the support sleeve 10 and the fixed mold to move up and down synchronously. The displacement sensor provides real-time feedback of position information to ensure horizontal synchronization during the lifting process. During the extrusion of the blank by the punch, the reverse flow force generated by the blank is transmitted sequentially through the extrusion mold 12, the second U-shaped key 11 and the cylindrical pin 6 to the support sleeve 10 and the support base 7, and then transmitted to the guide column 3 through the first U-shaped key, and finally distributed to the extrusion pad 1 to achieve uniform load bearing. After the punch rises and completes the extrusion, the unloading cylinder 8 and the push-pull cylinder 9 are activated synchronously by the controller. The unloading cylinder 8 and the push-pull cylinder 9 work together to pull the first U-shaped key out of the mating hole between the guide post 3 and the support seat 7, thus releasing the position constraint.

[0037] Specifically, the lifting cylinder 2 is activated to raise the extrusion die 12. After the tooling is placed at the bottom of the die, the lifting cylinder 2 is then controlled to lower the die to the designated position. After the tooling is placed or the die is transferred, the unloading cylinder 8 and the push-pull cylinder 9 are reset, causing the first U-shaped key to return to its initial mating position. The lifting cylinder 2 then causes the support sleeve 10 to fall back to its initial low position. The power source of the hydraulic station is then turned off, completing one work cycle.

[0038] Specifically, before use, check whether the fixed connection between the extrusion pad 1 and the guide post 3 is reliable. The support sleeve 10 is sleeved on the guide post 3 through the support base 7, and the support base 7 is securely connected to the output end of the lifting cylinder 2. Ensure that the first U-shaped key is in the position where the first U-shaped key mounting hole of the guide post 3 and the second mounting hole 15 of the support base 7 are aligned. The unloading cylinder 8 and the push-pull cylinder 9 are in the initial retracted state, and the protective cover 5 is installed in place and covers the cylinder body components. Start the hydraulic station power source, connect the displacement sensor, lifting cylinder 2, unloading cylinder 8 and push-pull cylinder 9 through the controller, and test that the response of each component is normal to ensure that the support sleeve 10 is in the initial low position.

[0039] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A die locking device for reverse extrusion forging, characterized in that, The device includes a compression pad, with a plurality of guide posts spaced apart on its upper end. Each guide post has a first U-shaped key mounting hole, and a first U-shaped key is installed within each hole. One end of the first U-shaped key is fitted with a push-pull cylinder, and the other end with a retraction cylinder. A support base is provided at the upper end of the compression pad, and this support base is sleeved on the guide posts. Both ends of the first U-shaped key pass through the support base. A lifting cylinder is also provided on the compression pad, with its output end connected to the support base. The guide post, the first U-shaped key, and the support base cooperate to form constraints at multiple positions, which, together with the drive and locking of the push-pull cylinder, provide a stable clamping force. Instructions for use include the following steps: The extrusion die is installed on the upper part of the support sleeve, and is connected and fixed to the die by the second U-shaped key and cylindrical pin on the side of the support sleeve, thus realizing the initial connection between the die and the locking device. The controller starts the push-pull cylinder, which pushes the first U-shaped key to move along the first U-shaped key mounting hole of the guide post, so that the two ends of the first U-shaped key pass through the second mounting hole of the support seat, forming a tight position constraint with the guide post and the support seat, thus completing the mechanical locking of the mold by the locking device. The displacement sensors at the four corners monitor the position status of the support sleeve and the mold to ensure that the mold is not offset and that the first U-shaped key is properly engaged with each component. The controller commands the lifting cylinder to move, which drives the support sleeve and the fixed mold to move up and down synchronously. The displacement sensor provides real-time feedback of position information to ensure horizontal synchronization during the lifting process. During the extrusion of the blank by the punch, the reverse flow force generated by the blank is transmitted to the support sleeve and support base through the extrusion die, the second U-shaped key and the cylindrical pin in sequence, and then transmitted to the guide column through the first U-shaped key, and finally distributed to the extrusion pad to achieve uniform load bearing. After the punch rises and completes the extrusion, the controller synchronously starts the unloading cylinder and the push-pull cylinder. The unloading cylinder and the push-pull cylinder work together to pull the first U-shaped key out of the mating hole between the guide post and the support seat, thus releasing the position constraint.

2. The die locking device for reverse extrusion forging as described in claim 1, characterized in that, The support base is provided with a plurality of first mounting holes at intervals, and mounting plates are provided at both ends of the first mounting holes, and second mounting holes are provided on the mounting plates.

3. A die locking device for reverse extrusion forging as described in claim 2, characterized in that, The first mounting hole is a circular hole, and the guide post passes through the first mounting hole on the mounting base; the second mounting hole is an oblong hole, and the two ends of the first U-shaped key pass through the second mounting hole of the support base.

4. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, One end of the first U-shaped key is connected to the unloading cylinder, and the other end of the first U-shaped key is connected to the push-pull cylinder. The unloading cylinder and the push-pull cylinder drive the first U-shaped key to move.

5. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, The support base is provided with protective covers at both ends, the protective covers are connected to the support base, and the protective covers are provided with a retraction cylinder and a push-pull cylinder inside the protective covers, the output ends of the retraction cylinder and the push-pull cylinder extend out of the protective covers.

6. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, The support base is provided with cylindrical pins on its side, and several cylindrical pins are spaced apart. The cylindrical pins are detachably connected to the support base.

7. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, Several lifting cylinders are spaced apart. The lower part of each lifting cylinder is connected to a support base, and the lifting cylinder drives the support base to move.

8. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, Displacement sensors are installed at the corners of the support base. The displacement sensors are electrically connected to the controller. The controller is also electrically connected to the lifting cylinder, unloading cylinder, push-pull cylinder, and hydraulic power source. The hydraulic power source is connected to the lifting cylinder, unloading cylinder, and push-pull cylinder.

9. A die locking device for reverse extrusion forging as described in claim 1, characterized in that, The upper part of the support base is provided with a support sleeve, and the side of the support sleeve is provided with a plurality of second U-shaped key mounting holes at intervals, and a second U-shaped key is provided in the second U-shaped key mounting holes; the upper part of the support sleeve is provided with an extrusion mold.

Images