An upper top expander for ring shaping and a ring shaping method

Abstract

The present application relates to the technical field of bulging machine, and more particularly to an upper top bulging machine for ring shaping and a ring shaping method, which comprises a supporting table, a main oil cylinder mounted on the supporting table, a conical head connected to a main piston rod of the main oil cylinder, an outer side of the conical head being sleeved with a bulging assembly, a supporting frame mounted on the main oil cylinder, the main piston rod of the main oil cylinder being arranged through the supporting frame, the bulging assembly being adjustably connected to the supporting frame, a reset oil cylinder mounted on a side of the supporting frame, a reset piston rod of the reset oil cylinder being connected to the bulging assembly, a mold mounted on a top surface of the supporting frame and having a ring-shaped cross section, the mold being sleeved with the bulging assembly, and the mold comprising a plurality of unit molds, the unit molds being movable in a radial direction, and a ring being sleeved with the mold. The present application solves the technical problem of difficult ring bulging process in the prior art, improves the matching degree of the bulging machine to ring pieces of various sizes, and improves the shaping efficiency of the ring pieces.

Description

Technical Field

[0001] This invention relates to the field of bulging machine technology, and in particular to an upper-mounted bulging machine and a method for forming rings. Background Technology

[0002] As a key component in aerospace equipment, the dimensional accuracy and stability of ring components are not only directly related to the high efficiency, high reliability and long service life of aerospace equipment, but also a technical challenge that needs to be overcome in the field of ring component hot processing manufacturing.

[0003] The following problems exist with large ring components in current aviation equipment:

[0004] (1) There are many types of ring parts for aviation equipment, with complex cross-sections and increasingly larger sizes. Due to limitations such as the taper of the cone rod and the thickness of the ferrule, the shape and size range of ring parts that can be processed by each set of molds in the forming machine is limited. At the same time, if different molds are made for different models of large-sized ring parts in small batches, the cost is high and the practicality is poor.

[0005] (2) At present, the main materials used for aerospace rings are titanium alloys and magnesium alloys, but their forging temperature range is narrow. In the bulging process, the metal rings need to be bulged in multiple passes to achieve a complete circle. The bulging time is long and the temperature drop is difficult to control. Summary of the Invention

[0006] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention provides a top-mounted bulging machine and a ring forming method for ring forming, solving the technical problem of low adaptability of ring forming processes in the prior art, improving the matching degree of the bulging machine to rings of various sizes, and improving the forming efficiency of rings.

[0007] This invention provides an upward-mounted bulging machine for ring forming, comprising:

[0008] Support platform;

[0009] The main cylinder is installed on the support platform. The main piston rod of the main cylinder is connected to a conical head. An expansion assembly is sleeved on the outside of the conical head.

[0010] The support frame is installed on the main hydraulic cylinder, the main piston rod of the main hydraulic cylinder passes through the support frame, and the position of the expansion assembly is adjustablely connected to the support frame;

[0011] The reset cylinder is installed on the side of the support frame. The reset piston rod of the reset cylinder is connected to the expansion assembly. The main piston rod of the main cylinder extends upward to drive the conical head to move upward, thereby driving the expansion assembly to move horizontally away from the conical head. At the same time, the reset piston rod of the reset cylinder assists in pulling the expansion assembly.

[0012] A mold with an annular cross-section is installed on the top surface of the support frame. The mold is fitted onto the forming assembly. The mold includes several sets of unit molds. The unit molds are movable in the radial direction. The ring is fitted onto the mold. The forming assembly moves away from the conical head, thereby driving the unit molds to move in the radial direction away from the conical head to shape the ring.

[0013] A further improvement of the top-mounted bulging machine for ring forming of the present invention is that it further includes a rotary motor mounted on the top of the support frame, the rotary motor having a rotating shaft extending in the radial direction of the mold, and the ring being placed on the top of the rotating shaft;

[0014] The rotary motor drives the rotating shaft to rotate, thereby causing the ring to rotate.

[0015] A further improvement of the present invention, an top-mounted bulging machine for ring forming, is that the support frame includes an upper plate assembly, a middle plate assembly, and a lower plate assembly;

[0016] The lower plate assembly is installed on the main hydraulic cylinder;

[0017] The middle plate assembly is mounted on the top surface of the lower plate assembly, and the reset cylinder is located on the side of the middle plate assembly;

[0018] The upper plate assembly is mounted on the top surface of the middle plate assembly, and the mold is mounted on the top of the upper plate assembly.

[0019] A further improvement of the top-mounted bulging machine for ring forming of the present invention is that a plurality of guide rail support assemblies are provided on the top of the upper plate assembly, and guide rails are provided on the top of the plurality of guide rail support assemblies, and the rotating shaft is disposed on the guide rails.

[0020] A further improvement of the top-mounted bulging machine for ring forming of the present invention is that a side mold is provided on the side of the unit mold away from the conical head, and the ring is sleeved on the side mold.

[0021] A further improvement of the top-mounted bulging machine for ring forming of the present invention is that the bulging assembly includes several sets of shaping claws, and the shaping claws have a first step formed at the position corresponding to the reset piston rod, the first step being connected to the reset piston rod.

[0022] A further improvement of the present invention, an top-mounted bulging machine for ring forming, is that it further includes a temperature control system for detecting the temperature of the ring and the temperature of the mold.

[0023] A further improvement of the present invention, an top-mounted bulging machine for ring forming, is that it further includes a controller, which is driven and connected to the main oil cylinder and the reset oil cylinder, and is controlled and connected to the temperature control system.

[0024] A further improvement of the present invention, an top-mounted bulging machine for ring forming, is that it further includes a displacement gauge disposed on the support frame, the displacement gauge being used to detect the stroke of the main piston rod of the main oil cylinder.

[0025] A ring forming method, performed using an upper-mounted bulging machine for ring forming as described above, includes the following steps:

[0026] S1, the ring, which is within the preset forging temperature range, is fitted onto the mold and placed on top of the rotating shaft;

[0027] S2, the main piston rod of the main cylinder extends upward to drive the conical head to move upward, thereby driving the expansion assembly to move away from the conical head. At the same time, the reset piston rod of the reset cylinder assists in pulling the expansion assembly to move, thereby driving the unit mold to move in the radial direction away from the conical head, so as to perform an expansion operation on the ring and adjust the ring to rotate at a set angle.

[0028] S3, execute S2 multiple times until the ring is shaped.

[0029] This invention discloses a top-mounted bulging machine for ring forming, in which the mold comprises several sets of unit molds. By synchronously moving these unit molds radially, the bulging size of the mold changes, thereby increasing the size of the rings the mold can accommodate. A rotary motor and a rotary shaft facilitate the rotation of the rings, ensuring uniform force distribution and improving the quality of the formed rings. A temperature control system detects temperature changes during forming, preventing excessively high or low temperatures that could affect the forming quality. A controller allows for timely monitoring of the rings' status, identifying performance issues and equipment load limits during forming, preventing over-bulging and equipment damage that could compromise quality. A displacement gauge precisely monitors the stroke of the main hydraulic cylinder, facilitating control of the ring bulging rate.

[0030] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in this 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 some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of an top-mounted bulging machine for ring forming provided by the present invention.

[0033] Figure 2 This is a cross-sectional schematic diagram of the mold and bulging assembly in an top-mounted bulging machine for ring forming provided by the present invention.

[0034] Figure label:

[0035] 1. Support platform; 2. Main piston rod; 21. Cylinder body; 22. Cylinder edge; 3. Conical head; 4. Bulging assembly; 5. Mold; 6. Side mold; 7. Rotary motor; 8. Guide rail support assembly; 9. Lower plate assembly; 91. Lower plate base; 92. Lower plate column; 93. Lower plate top seat; 10. Middle plate assembly; 11. Upper plate assembly; 12. Reset cylinder; 13. Hydraulic motor; 14. Temperature control system; 15. Displacement gauge; 16. Controller; 17. Vision sensor. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention. The following embodiments are used to illustrate this invention but should not be used to limit the scope of this invention.

[0037] The following is combined Figure 1 and Figure 2 The present invention describes an upper-mounted bulging machine for ring forming, comprising:

[0038] Support platform 1;

[0039] The main cylinder is installed on the support platform 1. The main piston rod 2 of the main cylinder is connected to a conical head 3. An expansion component 4 is sleeved on the outside of the conical head 3.

[0040] The support frame is installed on the main oil cylinder, the main piston rod 2 of the main oil cylinder passes through the support frame, and the expansion assembly 4 is connected to the support frame in an adjustable position;

[0041] The reset cylinder 12 is installed on the side of the support frame. The reset piston rod of the reset cylinder 12 is connected to the expansion assembly 4. The main piston rod 2 of the main cylinder extends upward to drive the conical head 3 to move upward, thereby driving the expansion assembly 4 to move horizontally away from the conical head 3. At the same time, the reset piston rod of the reset cylinder 12 assists in pulling the expansion assembly 4 to improve the movement stability of the expansion assembly.

[0042] A mold 5 with an annular cross-section is installed on the top surface of the support frame. The mold 5 is fitted onto the bulging component 4. The mold 5 includes several unit molds. The unit molds can move in the radial direction. The ring is fitted onto the mold 5. The bulging component 4 moves away from the conical head 3, thereby driving the unit molds to move in the radial direction away from the conical head 3 to shape the ring.

[0043] In a preferred embodiment of the top-mounted bulging machine for ring forming of the present invention, the support frame includes an upper plate assembly 11, a middle plate assembly 10, and a lower plate assembly 9; the lower plate assembly 9 is mounted on the main hydraulic cylinder; the middle plate assembly 10 is mounted on the top surface of the lower plate assembly 9, and the reset hydraulic cylinder 12 is disposed on the side of the middle plate assembly 10; the upper plate assembly 11 is mounted on the top surface of the middle plate assembly 10, and the mold 5 is mounted on the top of the upper plate assembly 11.

[0044] Better, such as Figure 1 As shown, the main cylinder includes a cylinder body 21 fixed to the support platform, and a cylinder edge 22 formed on the top of the cylinder body 21. The lower plate assembly 9 includes a lower plate base 91 fixed to the cylinder edge 22, a lower plate column 92 fixed to the lower plate base 91, and a lower plate top seat 93 fixed to the lower plate column 92. The conical head 3 passes through the lower plate top seat 93. The middle plate assembly 10 is fixed to the top surface of the lower plate top seat. The lower plate column 92 passes through and connects the middle plate assembly 10 and the upper plate assembly 11.

[0045] Specifically, it also includes a displacement ruler 15 disposed on the support frame. The displacement ruler 15 is used to detect the stroke of the main piston rod 2 of the main oil cylinder. By detecting the stroke of the main piston rod 2 through the displacement ruler 15, it is convenient to detect the radial travel distance of the mold 5, thereby obtaining the size of the ring expansion.

[0046] Preferably, the displacement gauge 15 is disposed on the side of the lower plate base 91 and the displacement measuring head of the displacement gauge passes through the gap between the lower plate columns 92 to correspond to the main piston rod 2.

[0047] Furthermore, it also includes a rotary motor 7 mounted on the top of the support frame, the rotary motor 7 having a rotating shaft extending radially along the mold 5, and the ring being placed on top of the rotating shaft; the rotary motor 7 drives the rotating shaft to rotate, thereby driving the ring to rotate.

[0048] Specifically, the top of the upper plate assembly 11 is provided with a plurality of guide rail support assemblies 8, the top of the plurality of guide rail support assemblies 8 is provided with guide rails, and the rotation shaft is disposed on the guide rails.

[0049] Specifically, a hydraulic motor 13 is also provided on the side of the support frame. The hydraulic motor 13 and the rotary motor 7 are connected by a belt pulley transmission assembly. The hydraulic motor 13 provides power, thereby driving the rotary motor 7 to rotate, which in turn drives the rotating shaft to rotate.

[0050] Preferably, there are 3 sets of rotary motors 7, which are evenly arranged at 120° intervals. After the conical head 3 of the top-mounted bulging machine drives the bulging component 4 and the mold 5 to perform one bulging operation, the hydraulic motor 13 drives the rotary motor 7 to rotate through the belt pulley transmission component, thereby driving the rotating shaft to rotate, which in turn drives the ring to rotate 120°, thus facilitating the conical head 3 of the top-mounted bulging machine to drive the bulging component 4 and the mold 5 to perform the next bulging operation.

[0051] Specifically, a side mold 6 is provided on the side of the unit mold away from the conical head 3, and the ring is sleeved on the side mold 6. The mold 5 includes 12 unit molds, each of which is equipped with multi-level segmented composite layers in the radial direction. The multi-level segmented composite layers are fixed with connecting pieces, so that the expansion force during the expansion process is stably transmitted to the side mold 6. The side mold 6 can be replaced according to the inner diameter and shape of the ring.

[0052] Preferably, the side mold 6 is not only easy to replace to accommodate rings of different sizes, but also enhances the stability and controllability of the bulging process. The multi-level segmented composite layer structure of the unit mold ensures that the bulging force is evenly distributed, avoiding damage to the mold 5 or deformation of the ring due to stress concentration. This not only improves the service life of the bulging machine, but also guarantees the accuracy and quality of the shaped ring.

[0053] Furthermore, the bulging component 4 includes several sets of shaping claws, the number of shaping claws matching the number of unit modules. The shaping claws have a first step corresponding to the position of the reset piston rod. The first step is connected to the reset piston rod. The shaping claws can move stably by being pulled by the reset piston rod.

[0054] Furthermore, it also includes a temperature control system 14. The temperature control system 14 includes a main control circuit, a ring temperature sensor, a mold temperature sensor, a full-stage temperature status observer, and a human-machine interface component. The user sets the temperature parameters during ring bulging through the human-machine interface component. After the main control circuit acquires the temperature parameters, it collects relevant temperatures through the mold temperature sensor and the ring temperature sensor. The controller calculates the temperature control quantity based on the set temperature parameters during ring bulging and the relevant temperatures collected by the mold temperature sensor and the ring temperature sensor. The controller sends a control signal to the main control circuit based on the temperature control quantity, and the main control circuit adjusts the bulging temperature parameters.

[0055] Preferably, the full-stage temperature status observer monitors the temperature changes of the mold 5 and the ring in real time during the bulging process, ensuring that the temperature is always kept within the preset process range. This not only improves the stability of the bulging process, but also effectively prevents the quality of the ring from deteriorating due to temperature fluctuations.

[0056] Furthermore, it also includes a controller 16, which is connected to the main cylinder and the reset cylinder 12, and is connected to the temperature control system 14.

[0057] Preferably, the controller 16 includes a springback compensation system, a deformation strain rate control system, a ring section stress control system, and a defect monitoring system.

[0058] Preferably, the springback compensation system includes six non-contact extensometers that can acquire images during the ring bulging process and compensate for the elastic strain of the ring based on the acquired images. After three bulging processes, the diameter and roundness tolerances of the ring meet the standard requirements. This springback compensation system effectively solves the problem of increased diameter and roundness errors caused by elastic strain during the ring bulging process.

[0059] Preferably, the cone angle of the cone head 3 is Conical angle Let the acute angle between a line and its projection onto the plane be the velocity of the conical head as determined by the displacement scale. Thus, the movement speed of the mold can be obtained. , Then the deformation rate of the ring is .

[0060] Specifically, the average elastic strain of the ring is calculated. Based on Cartesian coordinates and the Poisson effect, the elastic strain of the ring in three directions during the bulging process is calculated. , , Elastic strain compensation Poisson's ratio , , , , ;

[0061] After each bulging operation, a springback compensation system is used to preload and compensate for the elastic strain of the ring after unloading. ,in, This represents the elastic strain compensation amount under the current process (current bulging process). The magnitude of elastic strain for the next process (the next bulging process), This refers to the elastic strain that should be generated in the next process (the next bulging process);

[0062] The radial expansion displacement of the ring component is calculated based on the elastic strain of the next step, and the cone head displacement is calculated based on the radial expansion displacement. In other words, the elastic compensation system can calculate the displacement that the main cylinder and the cone head should produce in the next step.

[0063] Preferably, in a three-dimensional Cartesian coordinate system, the stress state of the ring in the three principal directions is calculated based on the elastic constitutive relation and elastic strain. , , ;

[0064]

[0065] in, Let be the elastic modulus of the ring material. As the ring diameter increases during the bulging process, the stress in the ring section increases, leading to an increase in the principal stresses at each point on the ring in the three directions. When the magnitudes of the principal stresses in the three directions satisfy the Mise yield criterion, the material enters the plastic yield state. ;

[0066] The yield stress state of the ring material;

[0067] At this point, the yield stress state can be taken as the plastic stress state:

[0068]

[0069] The stress state of the critical section is monitored using a ring section stress control system. The calculated plastic stress state is then substituted into the ring section stress control system to calculate the stress gradient of the ring section. And monitor it. This indicates that there is no dangerous section in the current bulging operation, and also shows that the parameters of the top-mounted bulging machine are reasonable at this time.

[0070] Preferably, the plastic strain rates in three directions are calculated according to the Levy-Mise plastic flow increment theory:

[0071]

[0072]

[0073]

[0074] The plastic strain rate of the ring was calculated based on the plastic strain rates in three directions. , and the plastic strain rate of the ring. The strain rate is then monitored using a deformation strain rate control system. When the strain rate is between its maximum and minimum values... This indicates that the parameters of the top-mounted bulging machine are reasonable at this time;

[0075] The defect monitoring system is used to monitor the surface defects and diameter of the ring. If the surface defects, diameter and roundness of the ring meet the standards, the next step of the bulging operation is carried out. When the monitoring data of the ring strain rate and cross-sectional stress gradient reach the set limit, the bulging operation is terminated.

[0076] Preferably, the strain rate of the ring during the bulging operation is predicted by the deformation strain rate control system. If the material deformation load at the current strain rate exceeds the maximum load value of the top-mounted bulging machine, the system can issue an early warning and terminate the bulging process, thereby effectively protecting the top-mounted bulging machine.

[0077] Preferably, the stress value of the ring section is monitored in real time by the ring section stress control system. Once the stress value reaches 0.8 times the tensile strength of the ring material, the controller 16 will immediately terminate the current bulging process to prevent the ring section from thinning, thereby avoiding the increase of stress gradient and the expansion of stress concentration area.

[0078] Preferably, the defect monitoring system consists of six vision sensors 17 evenly distributed around the circumference of the ring component. These sensors monitor the surface defects and diameter of the ring component during each bulging operation and upload the data to the controller 16. The controller then calculates the roundness of the ring component under transient conditions, identifies the location of defects, determines the quality level of the defects, and generates a process report.

[0079] A ring forming method, performed using an upper-mounted bulging machine for ring forming as described above, includes the following steps:

[0080] S1, the ring piece within the preset forging temperature range is fitted onto the mold 5 and placed on top of the rotating shaft;

[0081] S2, the main piston rod 2 of the main cylinder extends upward to drive the conical head 3 to move upward, thereby driving the expansion assembly 4 to move away from the conical head 3. At the same time, the reset piston rod of the reset cylinder 12 assists in pulling the expansion assembly 4 to move, thereby driving the unit mold to move in the radial direction away from the conical head 3, so as to perform an expansion operation on the ring and adjust the rotation set angle of the ring.

[0082] S3, execute S2 multiple times until the ring is shaped.

[0083] Specifically, the ring is preheated in a heat treatment furnace, and then placed on an expansion machine when the ring temperature is within the preset forging temperature range.

[0084] Preferably, after performing one bulging operation on the ring, the elastic strain of the ring is compensated by a springback compensation system, the load is controlled by a deformation strain rate control system, the cross-sectional stress value of the ring is monitored by a ring cross-section stress control system, and the surface defects and diameter of the ring are monitored by a defect monitoring system to ensure that the top-mounted bulging machine performs a stable bulging operation on the ring to complete the shaping of the ring.

[0085] The present invention discloses a top-mounted bulging machine for ring forming, wherein the mold 5 comprises several sets of unit molds. By synchronously moving multiple sets of unit molds radially, the bulging size of the mold 5 can be changed, thereby increasing the size of the ring that the mold 5 can accommodate. A rotary motor 7 and a rotary shaft facilitate the rotation of the ring, ensuring uniform force distribution and improving the quality of the formed ring. A temperature control system 14 monitors the temperature changes of the ring during forming, preventing excessively high or low temperatures that could affect the forming quality. A controller 16 allows for timely monitoring of the ring's status, enabling timely detection of its performance and the equipment's load limits during forming, preventing over-bulging and equipment damage that could affect the ring's quality. A displacement gauge 15 allows for precise monitoring of the main hydraulic cylinder's stroke, facilitating control of the ring's bulging rate.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A top-mounted bulging machine for forming ring parts, characterized in that, include: Support platform; The main cylinder is installed on the support platform. The main piston rod of the main cylinder is connected to a conical head. An expansion assembly is sleeved on the outside of the conical head. The support frame is installed on the main hydraulic cylinder, the main piston rod of the main hydraulic cylinder passes through the support frame, and the position of the expansion assembly is adjustablely connected to the support frame; The reset cylinder is installed on the side of the support frame. The reset piston rod of the reset cylinder is connected to the expansion assembly. The main piston rod of the main cylinder extends upward to drive the conical head to move upward, thereby driving the expansion assembly to move horizontally away from the conical head. At the same time, the reset piston rod of the reset cylinder assists in pulling the expansion assembly. A mold with an annular cross-section is installed on the top surface of the support frame. The mold is fitted onto the bulging assembly. The mold includes several sets of unit molds. The unit molds are movable in the radial direction. The ring is fitted onto the mold. The bulging assembly moves away from the conical head, thereby driving the unit molds to move in the radial direction away from the conical head to shape the ring. A temperature control system is used to detect the temperature of the ring and the temperature of the mold; The controller is connected to the main cylinder and the reset cylinder, and is also connected to the temperature control system. The controller includes a springback compensation system, a deformation strain rate control system, a ring section stress control system, and a defect monitoring system. The controller calculates the average elastic strain of the ring. Based on Cartesian coordinates and the Poisson effect, the elastic strain of the ring in three directions during the bulging process is calculated. , , Elastic strain compensation Poisson's ratio , , , , ; After each bulging operation of the ring is completed, a springback compensation system is used to preload and compensate for the elastic strain of the ring after unloading. ,in, This represents the elastic strain compensation amount during the current bulging process. For the elastic strain in the next bulging process, This refers to the elastic strain that should be generated during the next bulging process; The radial expansion displacement of the ring is calculated based on the elastic strain of the next step, and the displacement of the conical head is calculated based on the radial expansion displacement. Thus, the elastic compensation system can calculate the displacement that the main cylinder and the conical head should produce in the next step. The stress state of the ring in three directions is calculated based on elastic constitutive relations and elastic strain. , , ; in, Let be the elastic modulus of the ring material. As the ring diameter increases during the bulging process, the stress in the ring section increases, leading to an increase in the principal stresses at each point on the ring in the three directions. When the principal stresses in the three directions satisfy the Mise yield criterion, the ring material enters the plastic yield state. ,in, The yield stress state of the ring material; The controller can treat the stress state of the ring as a plastic stress state: The ring section stress control system monitors the stress state of the critical section, substitutes the calculated plastic stress state into the ring section stress control system, and calculates the stress gradient of the ring section. And monitor it, when This indicates that no dangerous section appeared in the ring during the current bulging operation; The plastic strain rates in three directions were calculated based on the Levy-Mise incremental plastic flow theory: The plastic strain rate of the ring was calculated based on the plastic strain rates in three directions. , And the plastic strain rate of the ring. The values ​​are then input into the deformation strain rate control system for monitoring. When the plastic strain rate is between its maximum and minimum values... This indicates that no dangerous section appeared in the ring during the current bulging operation; The surface defects and diameter of the ring are monitored using a defect monitoring system. If the surface defects, diameter, and roundness of the ring meet the standards, the bulging operation is carried out in the next process. The bulging operation is terminated when the monitoring data of the plastic strain rate of the ring and / or the monitoring data of the cross-sectional stress gradient reach the standard.

2. The top-mounted bulging machine for ring forming according to claim 1, characterized in that, It also includes a rotary motor mounted on top of the support frame, the rotary motor having a rotating shaft extending radially along the mold, and the ring being placed on top of the rotating shaft; The rotary motor drives the rotating shaft to rotate, thereby causing the ring to rotate.

3. The top-mounted bulging machine for ring forming according to claim 2, characterized in that, The support frame includes an upper plate assembly, a middle plate assembly, and a lower plate assembly; The lower plate assembly is installed on the main hydraulic cylinder; The middle plate assembly is mounted on the top surface of the lower plate assembly, and the reset cylinder is located on the side of the middle plate assembly; The upper plate assembly is mounted on the top surface of the middle plate assembly, and the mold is mounted on the top of the upper plate assembly.

4. A top-mounted bulging machine for ring forming according to claim 3, characterized in that, The top of the upper plate assembly is provided with several guide rail support assemblies, and the top of the several guide rail support assemblies is provided with guide rails, and the rotation shaft is disposed on the guide rails.

5. A top-mounted bulging machine for ring forming according to claim 1, characterized in that, The unit mold has a side mold on its side away from the conical head, and the ring is fitted onto the side mold.

6. A top-mounted bulging machine for ring forming according to claim 1, characterized in that, The bulging assembly includes several sets of shaping claws, and the shaping claws have a first step formed at the position of the reset piston rod, the first step being connected to the reset piston rod.

7. A top-mounted bulging machine for ring forming according to claim 1, characterized in that, It also includes a displacement gauge disposed on the support frame, the displacement gauge being used to detect the stroke of the main piston rod of the main hydraulic cylinder.

8. A method for shaping a ring component, characterized in that, The ring forming method is performed using an top-mounted bulging machine for ring forming as described in any one of claims 1 to 7, comprising the following steps: S1, the ring, which is within the preset forging temperature range, is fitted onto the mold and placed on top of the rotating shaft; S2, the main piston rod of the main cylinder extends upward to drive the conical head to move upward, thereby driving the expansion assembly to move away from the conical head. At the same time, the reset piston rod of the reset cylinder assists in pulling the expansion assembly to move, thereby driving the unit mold to move in the radial direction away from the conical head, so as to perform an expansion operation on the ring and adjust the ring to rotate at a set angle. S3, execute S2 multiple times until the ring is shaped.

Images