Automatic vertical ring rolling mill with adjustable core roller

Abstract

The invention relates to the technical field of metal ring piece rolling equipment, in particular to an automatic vertical ring rolling mill with an adjustable core roller, which comprises a controller, a transmission shaft assembly and a core roller lifting mechanism, the transmission shaft assembly comprises a transmission shaft and a driving roller which are driven by a motor and is used for providing power for the driving roller and the core roller and rolling the ring rolling blank through rotation and extrusion of the driving roller and the core roller; a piston part of the lifting oil cylinder is provided with a pressure sensor, rolling force borne by the rolling ring blank is detected through the pressure sensor, and detected information is sent to the controller; and the controller is connected with a laser range finder for detecting the reduction amount of the wall thickness of the ring piece in each rotation and the real-time outer radius of the ring piece in real time, meanwhile, the controller adjusts the final execution feeding speed of the core roller according to the real-time rolling force borne by the ring piece and the set rolling force, and the rotation stability of the core roller is improved.

Description

Technical Field

[0001] This invention relates to the field of metal ring rolling equipment, specifically to a vertical ring rolling mill with an automated adjustable mandrel. Background Technology

[0002] A ring rolling mill is a specialized forging and pressing equipment used to manufacture seamless ring forgings. It employs a ring rolling process, which involves locally and continuously radially rolling a heated ring-shaped metal blank to reduce its wall thickness and increase its diameter, ultimately forming a precision ring part of the required size and shape. It is mainly used in aerospace, new energy wind power, and other fields. Vertical ring rolling mills generally use a drive roller that moves downward to squeeze the ring blank, and a mandrel roller to roll the ring. One end of the mandrel roller is suspended for easy loading. However, the mandrel roller is subjected to huge radial rolling forces and axial bending moments during the rolling process.

[0003] Chinese invention patent CN119609014A discloses an automated vertical ring rolling mill, which mainly solves the problem that the mandrel of the ring rolling mill is prone to bending and damage due to improper clamping and misalignment, thus affecting the product processing accuracy. However, the aforementioned automated vertical ring rolling mill often relies on manual operation or semi-automatic control in the stages of loading, alignment, dimensional measurement, process control, and unloading, resulting in low efficiency, poor consistency, and difficulty in achieving fully automated production. Summary of the Invention

[0004] The purpose of this invention is to provide an automated vertical ring rolling mill with an adjustable mandrel, which can prevent the mandrel from bending during the rolling process and improve the automation level and process control accuracy of the vertical ring rolling mill.

[0005] The technical solution of this invention is as follows: a vertical ring rolling mill with an automated adjustable mandrel, comprising a controller, a transmission shaft assembly, and a mandrel lifting mechanism. The mandrel lifting mechanism lifts the mandrel via a lifting cylinder, causing the mandrel and the drive roller to extrude the ring rolling blank. The transmission shaft assembly includes a transmission shaft driven by a motor, with a drive roller sleeved on the outside of the transmission shaft. The transmission shaft assembly provides power to the drive roller and the mandrel, and the ring rolling blank is rolled by the rotation and extrusion of the drive roller and the mandrel. A pressure sensor is installed on the piston of the lifting cylinder to detect the rolling force F on the ring rolling blank and send the detected signal to the controller. The controller is connected to a laser rangefinder that detects in real time the decrease in wall thickness ∆h per revolution of the ring and the real-time outer radius R of the ring.

[0006] The extension speed of the lifting cylinder and the speed of the motor are controlled by the controller, thereby determining the basic feed speed of the core roller and the speed of the drive roller. The relationship between the basic feed speed V of the core roller and the speed n of the drive roller is as follows: ;

[0007] Where, k: plasticity coefficient of the ring material; V: basic feed speed of the core roller, in mm / s; ∆h: reduction in wall thickness per revolution of the ring, in mm / revolution; n: rotational speed of the drive roller, in revolutions / s; R1: radius of the drive roller, in mm; R: real-time outer radius of the ring, in mm;

[0008] The extension speed of the lifting cylinder is controlled by the controller to determine the final feed speed of the mandrel lifting, and thus the rolling force required for the ring rolling blank is determined. The final feed speed V of the mandrel is... adj The rolling force F of the ring rolling blank is set. set The relationship between them is: ;

[0009] Where β is the pressure sensitivity coefficient, F act The current rolling force is obtained through a pressure sensor.

[0010] Furthermore, the vertical ring rolling mill also includes a base and a core roller adjustment mechanism. The base is provided with a core roller moving mechanism, which includes a lifting seat and a moving component. The lifting seat supports the core roller through a first bearing mounting bracket and a second bearing mounting bracket. The moving component is used to move the core roller out from one side of the lifting seat. The drive shaft assembly and the core roller lifting mechanism are provided above the core roller moving mechanism.

[0011] The core roller adjustment mechanism is mounted on the lifting seat. The core roller adjustment mechanism includes ribs on both sides of the lifting seat. Each rib is equipped with a push-pull cylinder. The operation of the two push-pull cylinders is controlled by a controller. The output ends of the two push-pull cylinders are respectively connected to the first bearing seat mounting frame and the second bearing seat mounting frame. The first bearing seat mounting frame and the second bearing seat mounting frame are respectively located at both ends of the core roller. The distance between the first bearing seat mounting frame and the second bearing seat mounting frame is adjusted by the two push-pull cylinders, thereby adjusting the effective support length of the core roller.

[0012] Preferably, the core roller moving mechanism includes a sliding bearing seat and a movable bearing seat, which are respectively connected to both ends of the core roller. The bottom of the sliding bearing seat is provided with a second bearing seat mounting bracket, and the bottom of the movable bearing seat is provided with a first bearing seat mounting bracket. Both the first and second bearing seat mounting brackets are mounted above the base via lifting seats. A moving component is provided on one side of the movable bearing seat. The moving component includes a moving cylinder and a bearing seat slide rail. The bearing seat slide rail is located on one side of the first bearing seat mounting bracket, and the upper surface of the bearing seat slide rail is flush with the upper surface of the first bearing seat mounting bracket. The moving cylinder is located on one side of the movable bearing seat and is mounted on the bearing seat slide rail. The moving cylinder is connected to a controller.

[0013] Furthermore, mounting bracket slide rails are provided on the inner walls of the opposite sides of the lifting seat, and each of the mounting bracket slide rails is slidably connected to the side walls of the first bearing seat mounting bracket and the second bearing seat mounting bracket.

[0014] Preferably, the drive shaft assembly further includes a main shaft fixing seat, which is mounted on the base via a support rod. The support rod supports the main shaft fixing seat directly above the core roller moving mechanism. A drive shaft is provided inside the main shaft fixing seat, with both ends of the drive shaft penetrating the side wall of the main shaft fixing seat and extending to the outside of the main shaft fixing seat. Both ends of the drive shaft are connected to the side wall of the main shaft fixing seat via self-aligning roller bearings. A motor is provided at one end of the drive shaft, and a drive roller is sleeved on the outside of the drive shaft. The drive roller is located inside the main shaft fixing seat, and its position corresponds to that of the core roller.

[0015] Preferably, the core roller lifting mechanism includes several main shafts, which are respectively located at the four corners of the lifting seat. The bottom end of each main shaft is located at the bottom of the lifting seat, and the top end of each main shaft passes through the lifting seat and the main shaft fixing seat and extends to the top of the main shaft fixing seat. That is, the main shafts and the main shaft fixing seat are slidably connected. The top ends of the main shafts are connected to a fixed frame. A lifting cylinder is provided in the middle of the fixed frame. The cylinder barrel of the lifting cylinder is connected to the fixed frame, and the piston part of the lifting cylinder is connected to the main shaft fixing seat.

[0016] Preferably, a measuring roller assembly is provided in the middle of the lifting seat. The measuring roller assembly includes a retractable measuring roller disposed in the middle of the lifting seat, and a displacement sensor is provided on the top of the measuring roller. The displacement sensor sends a signal to the controller.

[0017] Preferably, the first bearing housing mounting bracket, the second bearing housing mounting bracket, the lifting base, and the fixing bracket are all hollow structures.

[0018] The beneficial effects of this invention are as follows: By supporting both ends of the mandrel with sliding bearing seats and movable bearing seats, the problem of one end of the mandrel being suspended during the rolling operation is solved, thereby preventing the mandrel from bending or breaking during the rolling process. At the same time, by setting sliding bearing seats and movable bearing seats at both ends of the mandrel respectively, the forging blank is prevented from being thrown off the mandrel during the rolling operation. The distance between the movable bearing seat and the sliding bearing seat is adjusted by the push-pull hydraulic cylinder, thereby adjusting the effective support length of the mandrel to match the height of the forging blank, improving the stability and safety of the mandrel rotation, significantly reducing the bending stress of the mandrel, and increasing the service life of the mandrel. The controller judges the magnitude of the set rolling force and the actual rolling force, and adjusts the final feed speed of the mandrel according to the actual rolling force and the set rolling force, thereby protecting the vertical ring rolling mill, while ensuring stable deformation of the ring rolling blank, and improving the automation level and process control accuracy of the vertical ring rolling mill. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is the front view of the present invention; Figure 3 This is a cross-sectional view of the main view of the present invention; Figure 4 This is a schematic diagram of the core roller moving mechanism of the present invention; Figure 5 This is a schematic diagram of the core roller adjustment mechanism of the present invention. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] In the description of this invention, it should be noted that the terms "middle," "upper," "lower," "one side," "one end," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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. Therefore, they should not be construed as limitations on the invention. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0023] Currently, the mandrel of a vertical ring rolling mill is subjected to enormous radial rolling force and axial bending moment during the rolling process, which makes the mandrel prone to plastic bending deformation or even breakage, seriously affecting equipment life and production safety, and increasing maintenance costs. The equipment often relies on manual operation or semi-automatic control in stages such as loading, centering, dimensional measurement, process control, and unloading, resulting in low efficiency, poor consistency, and difficulty in achieving fully automated production. In view of this, the inventors of this application provide a vertical ring rolling mill with an automated adjustable mandrel, which can avoid bending of the mandrel during the rolling process and improve the automation level and process control accuracy of the vertical ring rolling mill.

[0024] like Figure 1-5 As shown, a vertical ring rolling mill with an automated adjustable mandrel includes a base 1, a mandrel moving mechanism 2, a transmission shaft assembly 3, a mandrel lifting mechanism 4, a mandrel adjusting mechanism 5, and a controller.

[0025] The core roller moving mechanism 2 is located above the base 1. The core roller moving mechanism 2 includes a lifting seat 27 and a moving assembly. The lifting seat 27 supports the core roller 21 via a first bearing mounting bracket 25 and a second bearing mounting bracket 26. The moving assembly is used to move the core roller 21 from one side of the lifting seat 27. The core roller moving mechanism 2 includes a sliding bearing seat 22 and a moving bearing seat 23. The sliding bearing seat 22 and the moving bearing seat 23 are respectively connected to both ends of the core roller 21. The bottom of the sliding bearing seat 22 is provided with a second bearing seat mounting bracket 26, and the bottom of the moving bearing seat 23... The unit is provided with a first bearing mounting bracket 25, and both the first bearing housing mounting bracket 25 and the second bearing housing mounting bracket 26 are mounted above the base 1 via a lifting seat 27; a moving component is provided on one side of the movable bearing housing 23, the moving component includes a moving cylinder 24 and a bearing housing slide rail 28, the bearing housing slide rail 28 is located on one side of the first bearing housing mounting bracket 25, and the upper surface of the bearing housing slide rail 28 is flush with the upper surface of the first bearing housing mounting bracket 25; the moving cylinder 24 is located on one side of the movable bearing housing 23, and the moving cylinder 24 is located on the bearing housing slide rail 28.

[0026] Based on the above embodiment, the movable bearing seat 23 is moved from the first bearing mounting bracket 25 to the bearing seat slide rail 28 by the movable cylinder 24. During this process, the mandrel 21 moves along with the movable bearing seat 23, causing the end of the mandrel 23 to move out of the interior of the sliding bearing seat 22. The movable cylinder 24 continues to drive the movable bearing seat 23 to move, so that the movable bearing seat 23 drives the mandrel 21 to completely move out of the first bearing seat mounting bracket 25, that is, the mandrel 21 is completely located on the bearing seat slide rail 28. At this time, the operator can place the forging blank on the mandrel 21 using a forklift. After the forging blank is placed on the mandrel 21, the movable bearing seat 23 is driven from the first bearing mounting bracket 25 to the bearing seat slide rail 28 by the movable cylinder 24. The bearing seat slide rail 28 moves to the first bearing mounting frame 25. During this process, the movable bearing seat 23 drives the core roller 21 to move and moves the end of the core roller 21 back into the sliding bearing seat 22. The sliding bearing seat 22 and the movable bearing seat 23 support both ends of the core roller 21, solving the problem of one end of the core roller 21 being suspended in the rolling operation and preventing the core roller 21 from bending or breaking during the rolling process. At the same time, since the sliding bearing seat 22 and the movable bearing seat 23 are respectively provided at both ends of the core roller 21, the forging blank is prevented from falling off the core roller 21 during the rolling operation, so that the vertical ring rolling mill can roll out rings with a higher diameter.

[0027] In this embodiment, the drive shaft assembly 3 is located above the core roller moving mechanism 2. The drive shaft assembly 3 includes a drive shaft 33 driven by a motor, and a drive roller 35 is sleeved on the outside of the drive shaft 33. The drive shaft assembly 3 provides power to the drive roller 35 and the core roller 21, and the ring rolling material is rolled by the rotation and extrusion of the drive roller 35 and the core roller 21. The drive shaft assembly 3 also includes a main shaft fixing seat 31, which is mounted on the base 1 by a support rod 32, and the support rod 32 supports the main shaft fixing seat 31. Supported directly above the core roller moving mechanism 2, the main shaft fixing seat 31 is equipped with a transmission shaft 33 inside. Both ends of the transmission shaft 33 pass through the side wall of the main shaft fixing seat 31 and extend to the outside of the main shaft fixing seat 31. Both ends of the transmission shaft 33 are connected to the side wall of the main shaft fixing seat 31 through self-aligning roller bearings 34. A motor is provided at one end of the transmission shaft 33, and an active roller 35 is sleeved on the outside of the transmission shaft 33. The active roller 35 is located inside the main shaft fixing seat 31, and the active roller 35 corresponds to the position of the core roller 21.

[0028] Based on the above embodiment, the transmission shaft 33 is driven to rotate by a motor, and the rotation of the transmission shaft 33 drives the active roller 35 to rotate simultaneously.

[0029] In this embodiment, as Figure 1-4As shown, the core roller lifting mechanism 4 is located above the core roller moving mechanism 2. The core roller lifting mechanism 4 lifts the core roller moving mechanism 2 through the lifting cylinder 43, so that the core roller 21 and the drive roller 35 squeeze the ring blank. The core roller lifting mechanism 4 includes several machine body main shafts 41, which are respectively located at the four corners of the lifting seat 27. The bottom end of each machine body main shaft 41 is located at the bottom of the lifting seat 27, and the top end of each machine body main shaft 41 passes through the lifting seat 27 and the main shaft fixing seat 31 and extends to the top of the main shaft fixing seat 31. That is, the several machine body main shafts 41 and the main shaft fixing seat 31 are slidably connected. The top ends of the several machine body main shafts 41 are connected to a fixed frame 42. The middle part of the fixed frame 42 is provided with a lifting cylinder 43. The cylinder barrel 43-1 of the lifting cylinder 43 is connected to the fixed frame 42, and the piston part 43-2 of the lifting cylinder 43 is connected to the main shaft fixing seat 31.

[0030] Based on the above embodiments, when the lifting cylinder 43 is extended, the piston part 43-2 of the lifting cylinder 43 abuts against the main shaft fixing seat 31. Since the main shaft fixing seat 31 is fixedly connected to the base through the support rod 32, under the reaction force of the piston part 43-2, the cylinder 43-1 of the lifting cylinder 43 drives the fixing frame 42 to move upward. While the fixing frame 42 moves upward, it drives the main shaft 41 of the machine body to move upward. The main shaft 41 of the machine body drives the lifting seat 27 at its bottom end to move upward. While the lifting seat 27 moves upward, it drives the first bearing seat mounting frame 25, the second bearing seat mounting frame 26, the movable bearing seat 23, the sliding bearing seat 22 and the core roller 21 on it to move upward until the core roller 21 and the active roller 35 jointly squeeze the forging blank sleeved on the core roller 21.

[0031] In this embodiment, as Figure 4 As shown, the core roller adjustment mechanism 5 includes ribs 51 disposed on both sides of the lifting seat 27. Each rib 51 is provided with a push-pull cylinder 52. The output ends of the two push-pull cylinders 52 are respectively connected to the first bearing seat mounting frame 25 and the second bearing seat mounting frame 26. The first bearing seat mounting frame 25 and the second bearing seat mounting frame 26 are respectively disposed at both ends of the core roller 21. The distance between the first bearing seat mounting frame 25 and the second bearing seat mounting frame 26 is adjusted by the two push-pull cylinders 52, thereby adjusting the effective support length of the core roller 21.

[0032] In addition, mounting bracket slide rails 53 are provided on the inner walls of the opposite sides of the lifting seat 27, and each mounting bracket slide rail 53 is slidably connected to the side wall of the first bearing seat mounting bracket 25 and the second bearing seat mounting bracket 26.

[0033] Based on the above embodiments, the distance between the movable bearing seat 23 and the sliding bearing seat 22 is adjusted by two push-pull cylinders 52, thereby adjusting the effective support length of the mandrel 21 to match the height of the forging blank. This improves the stability and safety of the mandrel rotation, significantly reduces the bending stress of the mandrel, and increases its service life. For example, when the height of the rolling ring is small, the two push-pull cylinders 52 push the first bearing seat mounting frame 25 and the second bearing seat mounting frame 26 closer together. Simultaneously, the first bearing seat mounting frame 25 and the second bearing seat mounting frame 26 move closer together, causing the movable bearing seat 23 and the sliding bearing seat 22 to move closer together, thus shortening the working length of the mandrel 21, i.e., reducing the effective support strength of the mandrel 21, to match the height of the forging blank. Figure 4 In this context, 'b' represents the height of the rolling ring, which improves the stability of the core roller 21's rotation. It should be noted that although the moving bearing seat 23 moves while driving the core roller 21, as the moving bearing seat 23 and the sliding bearing seat 22 approach each other, the end of the core roller 21 penetrates the sliding bearing seat 22 and extends to one side of the sliding bearing seat 22. In addition, when it is necessary to extend the effective support strength of the core roller 21, the first bearing seat mounting bracket 25 and the second bearing seat mounting bracket 26 are pulled away from each other by the two push-pull cylinders 52 respectively. As the first bearing seat mounting bracket 25 and the second bearing seat mounting bracket 26 move away from each other, the moving bearing seat 23 and the sliding bearing seat 22 move away from each other, which shortens the effective support length of the core roller 21. During this process, both ends of the core roller 21 are always located inside the sliding bearing seat 22 and the moving bearing seat 23.

[0034] In this embodiment, a pressure sensor is installed at the piston part 43-2 of the lifting cylinder 43. The pressure sensor detects the rolling force F on the ring blank and sends the detected information to the controller. The controller is connected to a laser rangefinder that detects the real-time decrease in wall thickness ∆h per revolution of the ring and the real-time outer radius R of the ring. The controller is used to control the operation of the moving cylinder 24, the lifting cylinder 43, the motor, and the push-pull cylinder 52. By controlling the extension speed of the lifting cylinder 43 and the rotation speed of the motor, the controller determines the basic feed speed of the core roller 21 and the rotation speed of the drive roller 35. The relationship between the basic feed speed V of the core roller 21 and the rotation speed n of the drive roller 35 is as follows: ;

[0035] Wherein, V: the basic feed speed of the core roller, in mm / s, which is the basic feed speed without considering the material properties and rolling force of the ring; k is the plasticity coefficient of the material; ∆h: the reduction in wall thickness of the ring per revolution, in mm / revolution; n: the rotational speed of the drive roller, in revolutions / s; R1: the radius of the drive roller, in mm; R: the real-time outer radius of the ring, in mm.

[0036] Specifically, the ring component is the ring rolling blank, and during the rolling process, the linear velocity of the drive roller is... The linear velocity of the drive roller is equal to the linear velocity of the outer edge of the ring: Where f is the rotational speed of the ring, in revolutions per second (rpm); thus, the rotational speed of the ring can be obtained. The time required for the ring to rotate one revolution Within this period T, the feed of the mandrel reduces the wall thickness of the ring by ∆h, and the basic feed speed V of the mandrel should satisfy... Where the period T is the time ∆t required for the ring to rotate one revolution; the relationship between the basic feed speed V of the core roller and the rotational speed n of the drive roller can be derived as follows: Therefore, it can be concluded that as the radius of the ring increases, the basic feed speed V of the core roller gradually decreases.

[0037] In this embodiment, the rolling force F on the ring blank and the reduction in wall thickness ∆h per revolution of the ring are detected in real time by a pressure sensor on the mandrel and a laser rangefinder. The extension speed of the lifting cylinder 43 is controlled by the controller to determine the final feed speed of the mandrel 21, and thus the rolling force required for the ring blank is determined. The final feed speed V of the mandrel 21 is then determined. adj The rolling force F of the ring rolling blank is set. set The relationship between them is: ;

[0038] Specifically, β is the pressure sensitivity coefficient of the rolling ring material, F act The current rolling force is obtained through a pressure sensor; the plasticity coefficient k and pressure sensitivity coefficient β of the rolling ring material are both material property data that can be obtained experimentally. The rolling force F exerted by the mandrel and drive roll on the rolling ring is determined by the yield strength of the rolling ring material. The rolling force on the rolling ring is determined by the contact area A between the rolling ring and the drive roll. The contact area between the grinding ring and the drive roller Where b is the ring height and w is the contact length, i.e., w is the arc length of the contact area between the rolling ring and the drive roller; contact length ,in Equivalent roll radius: The rolling force model of the rolling ring was derived. The yield strength of the ring rolling material With strain rate It increases with the increase of, that is , For reference strain rate Yield strength below, The yield strength of the material in its initial state. Let m be the strain rate of the material in its initial state, and m be the strain rate sensitivity index. , Both ε and m can be obtained experimentally; the relationship between strain rate ε and the basic feed speed V of the core roller is: Where h0 is the initial wall thickness of the ring rolling blank, the yield strength of the ring rolling material can be obtained. This leads to the dynamic equation relating the rolling force on the rolling ring to the basic feed speed V of the mandrel. ;make The power-law relationship between the rolling force F and the basic feed speed V for mandrel lifting was derived. The current rolling force F obtained through the pressure sensor act The relationship between the core roller's basic feed speed V and the core roller's basic feed speed V is as follows: When the rolling force is set to F set At that time, the final feed speed of the core roller is V. adj , and thus ,Right now ,according to It can be concluded that Regarding the formula After Taylor expansion, we get β is the pressure sensitivity coefficient. ,Will Substituting, we can obtain This formula represents the final feed speed V required for core roller lifting. adj The required rolling force F set The relationship between them.

[0039] The controller controls the operation of the motor and the lifting cylinder 43, and calculates the final feed speed V of the core roller 21. adj The lifting cylinder 43 is driven to operate based on the final feed speed of the core roller 21 and the pressure P of the lifting cylinder 43. In the actual working environment, the pressure sensor determines the rolling force F on the ring by detecting the pressure P of the lifting cylinder 43. The laser rangefinder is set outside the vertical ring rolling mill and measures the real-time outer radius R of the ring in real time. The amount of change in the real-time outer radius of the ring determines the reduction in wall thickness ∆h per revolution. act Below the set rolling force F set In this case, it indicates that the material's deformation resistance is relatively small, and the final feed speed of the mandrel 21 can be increased; under the current actual rolling force F act Higher than the set rolling force F set In such cases, it is necessary to reduce the final feed speed of the core roller 21 to protect the vertical ring rolling mill and ensure stable deformation of the ring rolling blank.

[0040] In this embodiment, a measuring roller assembly 6 is provided in the middle of the lifting seat 27. The measuring roller assembly 6 includes a retractable measuring roller 61 connected to the middle of the lifting seat 27. A displacement sensor is provided on the top of the measuring roller 61. The displacement sensor is connected to the controller. The diameter of the rolling ring is determined by adjusting the height of the measuring roller 61 extending out of the lifting seat 27. During the rolling operation of the ring rolling machine, when the diameter of the rolling ring reaches the height determined by the measuring roller 61, the displacement sensor detects the rolling ring and sends a signal to the controller. The controller then controls the motor to stop running.

[0041] In addition, the first bearing seat mounting bracket 25, the second bearing seat mounting bracket 26, the lifting seat 27 and the fixed frame 42 are all hollow structures, so that the lifting cylinder 43 can smoothly lift the core roller moving mechanism 2.

[0042] The working principle of this invention is as follows: Based on actual production requirements, the height of the measuring roller 61 extending from the lifting seat 27 is adjusted; the controller controls the moving cylinder 24 to shorten, causing the moving cylinder 24 to move the moving bearing seat 23 and the core roller 21 from the first bearing mounting frame 25 to the bearing seat slide rail 28, so that the end of the core roller 23 moves out of the sliding bearing seat 22; the controller continues to control the moving cylinder 24 to drive the moving bearing seat 23 to move, so that the moving bearing seat 23 drives the core roller 21 to be completely positioned on the bearing seat slide rail 28. At this time, the operator can place the forging blank on the core roller 21 using a forklift; after placing the forging blank on the core roller 21, the controller controls the moving cylinder 24 to extend, causing the moving cylinder to drive the moving bearing seat 23 and the core roller 21 to move from the bearing seat slide rail 28 to the first bearing mounting frame 25, and move the end of the core roller 21 back into the sliding bearing seat 22.

[0043] The controller controls the motor to drive the transmission shaft 33 to rotate, and the rotation of the transmission shaft 33 drives the active roller 35 to rotate. At the same time, the controller controls the extension of the lifting cylinder 43. The piston part 43-2 of the lifting cylinder 43 abuts against the main shaft fixed seat 31. Under the reaction force of the piston part 43-2, the cylinder 43-1 of the lifting cylinder 43 drives the fixed frame 42 to move upward, which in turn drives the main shaft 41 of the machine body to move upward. The main shaft 41 of the machine body drives the lifting seat 27 at its bottom end to move upward. As the lifting seat 27 moves upward, it drives the first bearing seat mounting frame 25, the second bearing seat mounting frame 26, the moving bearing seat 23, the sliding bearing seat 22 and the core roller 21 on it to move upward, until the core roller 21 and the active roller 35 jointly squeeze the forging blank sleeved on the core roller 21 to achieve the rolling of the forging blank.

[0044] When the required ring diameter is reached, the displacement sensor at the top of the measuring roller 61 detects the rolled ring and sends a signal to the controller. The controller then stops the motor, thereby stopping the rolling of the ring. Simultaneously, the controller controls the lifting cylinder 43 to shorten, causing the cylinder 43-1 of the lifting cylinder 43 and the fixed frame 42 to move downwards. The fixed frame 42 drives the main shaft 41 of the machine body and the lifting seat 27 to move downwards. The lifting seat 27 drives the first bearing seat mounting frame 25, the second bearing seat mounting frame 26, the movable bearing seat 23, the sliding bearing seat 22, and the core roller 21 to move downwards onto the base 1. At this time, the controller controls the movable cylinder 24 to shorten, completely moving the movable bearing seat 23 and the core roller 21 from the first bearing mounting frame 25 onto the bearing seat slide rail 28, so that the rolled ring can be removed from the core roller 21 after rolling.

[0045] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A vertical ring rolling mill with an automated adjustable mandrel, comprising a controller, a drive shaft assembly, and a mandrel lifting mechanism, wherein the mandrel lifting mechanism lifts the mandrel via a lifting cylinder, causing the mandrel and a drive roller to compress the ring rolling blank; the drive shaft assembly includes a drive shaft driven by a motor, and a drive roller is sleeved on the outside of the drive shaft; the drive shaft assembly provides power to the drive roller and the mandrel, and the ring rolling blank is rolled by the rotation and compression of the drive roller and the mandrel, characterized in that... A pressure sensor is installed on the piston of the lifting cylinder. The pressure sensor detects the rolling force F on the ring blank and sends the detected information to the controller. The controller is connected to a laser rangefinder that can detect the decrease in wall thickness ∆h per revolution of the ring and the real-time outer radius R of the ring. The extension speed of the lifting cylinder and the speed of the motor are controlled by the controller, thereby determining the basic feed speed of the core roller and the speed of the drive roller. The relationship between the basic feed speed V of the core roller and the speed n of the drive roller is as follows: ; Where, k: plasticity coefficient of the ring material; V: basic feed speed of the core roller, in mm / s; ∆h: reduction in wall thickness per revolution of the ring, in mm / revolution; n: rotational speed of the drive roller, in revolutions / s; R1: radius of the drive roller, in mm; R: real-time outer radius of the ring, in mm; The extension speed of the lifting cylinder is controlled by the controller to determine the final feed speed of the mandrel lifting, and thus the rolling force required for the ring rolling blank is determined. The final feed speed V of the mandrel is... adj The rolling force F of the ring rolling blank is set. set The relationship between them is: ; Where β is the pressure sensitivity coefficient, F act The current rolling force is obtained through a pressure sensor.

2. The vertical ring rolling mill with an automated adjustable core roller according to claim 1, characterized in that, The vertical ring rolling mill also includes a base and a core roller adjustment mechanism. The base is equipped with a core roller moving mechanism, which includes a lifting seat and a moving component. The lifting seat supports the core roller through a first bearing mounting bracket and a second bearing mounting bracket. The moving component is used to move the core roller out from one side of the lifting seat. The drive shaft assembly and the core roller lifting mechanism are arranged above the core roller moving mechanism. The core roller adjustment mechanism is mounted on the lifting seat. The core roller adjustment mechanism includes ribs on both sides of the lifting seat. Each rib is equipped with a push-pull cylinder. The operation of the two push-pull cylinders is controlled by a controller. The output ends of the two push-pull cylinders are respectively connected to the first bearing seat mounting frame and the second bearing seat mounting frame. The first bearing seat mounting frame and the second bearing seat mounting frame are respectively located at both ends of the core roller. The distance between the first bearing seat mounting frame and the second bearing seat mounting frame is adjusted by the two push-pull cylinders, thereby adjusting the effective support length of the core roller.

3. A vertical ring rolling mill with an automated adjustable core roller according to claim 2, characterized in that, The core roller moving mechanism includes a sliding bearing seat and a movable bearing seat, which are respectively connected to both ends of the core roller. A second bearing seat mounting bracket is provided at the bottom of the sliding bearing seat, and a first bearing seat mounting bracket is provided at the bottom of the movable bearing seat. Both the first and second bearing seat mounting brackets are mounted above the base via lifting seats. A moving component is provided on one side of the movable bearing seat. The moving component includes a moving cylinder and a bearing seat slide rail. The bearing seat slide rail is located on one side of the first bearing seat mounting bracket, and its upper surface is flush with the upper surface of the first bearing seat mounting bracket. The moving cylinder is located on one side of the movable bearing seat and is mounted on the bearing seat slide rail. The moving cylinder is connected to a controller.

4. A vertical ring rolling mill with an automated adjustable core roller according to claim 3, characterized in that, The inner walls on both opposite sides of the lifting seat are provided with mounting bracket slide rails, and each of the mounting bracket slide rails is slidably connected to the side walls of the first bearing seat mounting bracket and the second bearing seat mounting bracket.

5. A vertical ring rolling mill with an automated adjustable core roller according to claim 4, characterized in that, The drive shaft assembly also includes a main shaft mounting base, which is mounted on the base via a support rod. The support rod supports the main shaft mounting base directly above the core roller moving mechanism. A drive shaft is located inside the main shaft mounting base, with both ends of the drive shaft penetrating the side wall of the main shaft mounting base and extending to the outside of the main shaft mounting base. Both ends of the drive shaft are connected to the side wall of the main shaft mounting base via self-aligning roller bearings. A motor is installed at one end of the drive shaft, and a drive roller is sleeved on the outside of the drive shaft. The drive roller is located inside the main shaft mounting base, and its position corresponds to that of the core roller.

6. A vertical ring rolling mill with an automated adjustable core roller according to claim 5, characterized in that, The core roller lifting mechanism includes several main shafts, which are respectively located at the four corners of the lifting base. The bottom of each main shaft is located at the bottom of the lifting base, and the top of each main shaft passes through the lifting base and the main shaft fixing seat and extends to the top of the main shaft fixing seat. That is, the main shafts and the main shaft fixing seat are slidably connected. The tops of the main shafts are connected to a fixed frame. A lifting cylinder is provided in the middle of the fixed frame. The cylinder of the lifting cylinder is connected to the fixed frame, and the piston of the lifting cylinder is connected to the main shaft fixing seat.

7. A vertical ring rolling mill with an automated adjustable core roller according to claim 6, characterized in that, The lifting platform is provided with a measuring roller assembly in the middle. The measuring roller assembly includes a retractable measuring roller located in the middle of the lifting platform. A displacement sensor is provided on the top of the measuring roller, and the displacement sensor sends a signal to the controller.

8. A vertical ring rolling mill with an automated adjustable core roller according to claim 7, characterized in that, The first bearing housing mounting bracket, the second bearing housing mounting bracket, the lifting base, and the fixing bracket are all hollow structures.

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