A method, system and device for rolling a profiled ring based on the uniformity of the strain field

Abstract

The application provides a special-shaped ring piece rolling method, system and equipment based on strain field uniformity evaluation, and applies to the ring piece rolling process technical field. The method comprises the following steps: a plurality of numerical values of a plurality of key influencing factors involved in the rolling forming process of a ring blank are combined to obtain a plurality of groups of rolling data, and then a plurality of first special-shaped ring pieces are obtained by respectively simulating the rolling forming process and determining the strain field of each special-shaped ring piece; the contribution rate of each key influencing factor to the strain distribution influence of the special-shaped ring piece is calculated according to the strain distribution uniformity of the plurality of strain fields; then the key influencing factors are sorted according to the importance, and the current key influencing factor is traversed in the order from large to small; the optimal numerical value is determined from the plurality of numerical values corresponding to the current key influencing factor according to the plurality of strain distribution uniformities corresponding to the current key influencing factor, and is used as a group of optimal rolling data to simulate the rolling forming process, so that a special-shaped ring piece with better forming quality is obtained.

Description

Technical Field

[0001] This application relates to the field of ring rolling technology, and in particular to a method, system and equipment for rolling irregularly shaped rings based on strain field uniformity evaluation. Background Technology

[0002] With the booming development of emerging industries such as aerospace, new energy, and high-end equipment manufacturing, the requirements for the service performance, reliability, and lightweighting of key components are becoming increasingly stringent. Among them, irregularly shaped ring components are important parts of engine casings, which withstand high temperatures and loads, operate in extremely harsh environments, and have exceptionally stringent performance requirements. Axial rolling of ring components is an advanced continuous local plastic deformation technology that can achieve integral forming of ring components, retain continuous metal flow lines, improve mechanical properties, and has high material utilization and requires less equipment tonnage. Compared with traditional die forging, it is more suitable for manufacturing ring components with complex cross-sections.

[0003] Traditional methods for rolling irregularly shaped rings often focus on the filling or strain characteristics of the ring under single factors such as ring blank design and rolling process, which ultimately fails to produce irregularly shaped rings with good forming quality. Summary of the Invention

[0004] This application provides a method, system, and equipment for rolling irregularly shaped rings based on strain field uniformity evaluation. By combining multi-key influencing factor combination simulation with quantitative evaluation of contribution rate based on strain field, it overcomes the limitation of traditional single-factor analysis that cannot take into account the coupling effect of parameters. In addition, by sorting the key influencing factors according to their importance and traversing to determine the optimal values, a set of optimal rolling data is constructed, ensuring the targeted control of the radial and axial rolling of the rings. This significantly improves the uniformity of strain distribution in irregularly shaped rings, allowing plastic deformation to effectively penetrate to the core. It fundamentally solves the quality bottleneck of large cross-sectional strain gradient and uneven microstructure, achieving global optimization of forming quality and ultimately obtaining irregularly shaped rings with better forming quality.

[0005] This application provides a method for rolling irregularly shaped rings based on strain field uniformity evaluation, including: Multiple key influencing factors involved in the rolling forming process of the ring billet are obtained; and multiple values ​​corresponding to each of the multiple key influencing factors are combined to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; The rolling process of the ring billet is simulated using the multiple sets of rolling data to obtain the first irregular ring corresponding to each set of rolling data, and the strain field of the first irregular ring is determined; based on the uniformity of strain distribution of the multiple strain fields, the contribution rate of the multiple key influencing factors to the strain distribution of the irregular ring is calculated. Based on multiple contribution rates, the multiple key influencing factors are ranked by importance; and the current key influencing factors are traversed in descending order of importance. Based on the uniformity of multiple strain distributions corresponding to the current key influencing factors, the optimal value is determined from the multiple values ​​corresponding to the current key influencing factors. The optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data; and the rolling forming process of the ring billet is simulated using the optimal rolling data to obtain the second irregular ring.

[0006] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. The step of calculating the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring based on the strain distribution uniformity of each of the multiple strain fields includes: obtaining the first mean value corresponding to the strain distribution uniformity of each of the multiple strain fields; for each key influencing factor, obtaining the second mean value corresponding to the strain distribution uniformity of each of the multiple strain distributions corresponding to different values ​​under the key influencing factor; obtaining the squared differences between the multiple second mean values ​​and the first mean value; obtaining the sum of squared deviations corresponding to the key influencing factor based on the first sum of the multiple squared deviations and the number of experiments for each value under the key influencing factor; and determining the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring based on the sum of squared deviations corresponding to each of the multiple key influencing factors.

[0007] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. The step of determining the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring based on the sum of squared deviations corresponding to each of the multiple key influencing factors includes: obtaining a second sum value corresponding to the sum of squared deviations corresponding to each of the multiple key influencing factors; and for each key influencing factor, using the ratio of the sum of squared deviations corresponding to the key influencing factor to the second sum value as the contribution rate of the key influencing factor to the strain distribution of the irregularly shaped ring.

[0008] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. When the current key influencing factor is one of four key influencing factors: ring billet thickness, mandrel feed speed, drive roll speed, and contact friction between the mandrel and the ring billet, the step of determining the optimal value from multiple values ​​corresponding to the current key influencing factor based on multiple strain distribution uniformity levels includes: obtaining the third-degree mean values ​​corresponding to multiple strain distribution uniformity levels for different values ​​under the current key influencing factor, and determining the minimum value among the multiple third-degree mean values; determining the value corresponding to the minimum value from the multiple values ​​corresponding to the current key influencing factor, and using it as the optimal value corresponding to the current key influencing factor.

[0009] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. When the current key influencing factor is the ring billet heating temperature, the step of determining the optimal value from multiple values ​​corresponding to the current key influencing factor based on the uniformity of strain distribution corresponding to the current key influencing factor includes: setting a temperature constraint range, wherein the temperature constraint range is based on the criterion of suppressing Widmanstätten structure and avoiding surface over-oxidation behavior during the rolling process of the ring billet, and the upper limit of the temperature constraint range is lower than the β phase transformation point of the ring billet material; obtaining the fourth-degree mean value corresponding to multiple strain distribution uniformities at different values ​​within the temperature constraint range; and selecting the value with the smallest fourth-degree mean value that satisfies the Widmanstätten structure suppression requirement from the values ​​covered by the temperature constraint range as the optimal value corresponding to the ring billet heating temperature.

[0010] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. The method involves simulating the rolling process of the ring billet using multiple sets of rolling data to obtain a first irregularly shaped ring corresponding to each set of rolling data. The method includes: using the multiple sets of rolling data as a basis, rolling the ring billet into a ring with a rectangular cross-section using a rectangular pre-rolling die; using irregularly shaped rolls to perform preliminary adjustments on the ring and rolling it into a third irregularly shaped billet, wherein the contour similarity between the third irregularly shaped billet and the first irregularly shaped ring corresponding to the rolling data is greater than a preset similarity threshold; using irregularly shaped die rolls to perform secondary adjustments on the third irregularly shaped billet and rolling it into the first irregularly shaped ring corresponding to the rolling data.

[0011] According to an embodiment of this application, a method for rolling irregularly shaped rings based on strain field uniformity evaluation is provided. The first irregularly shaped ring or the second irregularly shaped ring is a C-shaped cross-section irregularly shaped ring. The upper and lower parts of the C-shaped cross-section irregularly shaped ring are symmetrical along the center line. The upper or lower part includes a first diameter region, a second diameter region, and a transition region connecting the first diameter region and the second diameter region. The transition region has a conical inclined surface.

[0012] This application also provides a rolling system for irregularly shaped rings based on strain field uniformity evaluation, including: The data acquisition module is used to acquire multiple key influencing factors involved in the rolling and forming process of the ring billet; The data processing module is used to combine the multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; The rolling simulation module is used to simulate the rolling forming process of the ring billet using the multiple sets of rolling data, obtain the first irregular ring corresponding to each of the multiple sets of rolling data, and determine the strain field of the first irregular ring. The data processing module is further configured to: calculate the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring component based on the uniformity of strain distribution in each of the multiple strain fields; rank the multiple key influencing factors according to their importance based on their contribution rates; traverse the current key influencing factors in descending order of importance; determine the optimal value from the multiple values ​​corresponding to the current key influencing factors based on the uniformity of strain distribution in each of the current key influencing factors; and use the optimal values ​​corresponding to each of the multiple key influencing factors as a set of optimal rolling data. The rolling simulation module is also used to simulate the rolling forming process of the ring billet using the optimal rolling data to obtain the second irregular ring.

[0013] This application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the irregular ring rolling method based on strain field uniformity evaluation as described above.

[0014] This application also provides a non-transitory computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the irregular ring rolling method based on strain field uniformity evaluation as described above.

[0015] This application also provides a computer program product, including a computer program that, when executed by a processor, implements the irregular ring rolling method based on strain field uniformity evaluation as described above.

[0016] The method, system, and equipment for rolling irregularly shaped rings based on strain field uniformity evaluation provided in this application embodiment acquire multiple key influencing factors involved in the rolling process of the ring billet; combine multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; simulate the rolling process of the ring billet using the multiple sets of rolling data to obtain the first irregularly shaped ring corresponding to each set of rolling data, and determine the strain field of the first irregularly shaped ring; based on the uniformity of strain distribution of each of the multiple strain fields... The process involves calculating the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring; ranking the multiple key influencing factors according to their contribution rates; iterating through the current key influencing factors in descending order of importance; determining the optimal value from the multiple values ​​corresponding to the current key influencing factors based on the uniformity of the strain distribution corresponding to the current key influencing factors; using the optimal values ​​corresponding to each of the multiple key influencing factors as a set of optimal rolling data; and simulating the rolling process of the ring billet using the optimal rolling data to obtain the second irregularly shaped ring. This method combines simulation of multiple key influencing factors with quantitative evaluation of contribution rates based on strain fields, overcoming the limitations of traditional single-factor analysis in taking into account the coupling effects of parameters. Furthermore, by sorting the key influencing factors according to their importance and traversing to determine the optimal values, a set of optimal rolling data is constructed, ensuring the targeted control of radial and axial rolling of the ring, significantly improving the uniformity of strain distribution in irregularly shaped rings, and enabling plastic deformation to effectively penetrate to the core. This fundamentally solves the quality bottlenecks of large cross-sectional strain gradient and uneven microstructure, achieving global optimization of forming quality, and ultimately obtaining irregularly shaped rings with better forming quality. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in this application 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 application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the target irregular ring provided in the embodiments of this application; Figure 2 This is a schematic diagram of the roll cross-section provided in an embodiment of this application; Figure 3 This is a schematic diagram of the strain distribution of an equal-thickness ring billet as its diameter increases during the rolling process, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the strain distribution of a non-uniform thickness ring blank a during the rolling process as the diameter increases, provided in an embodiment of this application. Figure 5 This is a schematic diagram of the strain distribution of the non-uniform thickness ring blank b as its diameter increases during the rolling process, provided in an embodiment of this application. Figure 6 This is a schematic flowchart of the irregular ring rolling method based on strain field uniformity evaluation provided in the embodiments of this application; Figure 7 This is a schematic diagram of the dimensional parameters of the non-uniform thickness ring blank under four different volume distribution levels provided in the embodiments of this application; Figure 8 This is a schematic diagram of the core roller feed speed provided in an embodiment of this application; Figure 9 This is a schematic diagram showing the second degree mean values ​​of the five key influencing factors provided in the embodiments of this application; Figure 10 This is a schematic diagram illustrating the contribution rate of each of the five key influencing factors provided in the embodiments of this application to the strain distribution of the irregularly shaped ring. Figure 11 This is a schematic diagram illustrating the uniformity of strain distribution among the various irregularly shaped ring components provided in the embodiments of this application; Figure 12 This is a schematic diagram of the physical structure of the second irregularly shaped ring provided in the embodiments of this application. Figure 13 This is a schematic diagram of the test results of the second irregularly shaped ring provided in the embodiments of this application; Figure 14 This is a schematic diagram of the irregular ring rolling system based on strain field uniformity evaluation provided in the embodiments of this application; Figure 15 This is a schematic diagram of the structure of the electronic device provided in the embodiments of this application. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0020] To better understand the embodiments of this application, the application scenarios of the embodiments of this application will first be described: The method for rolling irregularly shaped rings based on strain field uniformity evaluation provided in this application can be applied not only to aerospace, new energy, and high-end equipment manufacturing, but also to core load-bearing components such as bogie bearing rings and large-size connecting rings for high-speed trains and metro trains, deep-sea engineering equipment such as high-pressure resistant irregularly shaped flanges and sealing rings required for deep-sea drilling platforms and underwater robots, heavy industrial equipment such as irregularly shaped rings for slewing bearings of large excavators and tunnel boring machines, and key components of nuclear power such as support rings for pumps, valves, and reactor pressure vessels in nuclear power plants. It aims to obtain irregularly shaped rings with better forming quality, breaking through the limitations of traditional experience-based parameter adjustment and ensuring a high degree of consistency between the geometric accuracy and service performance of key components under complex working conditions.

[0021] Secondly, the target irregularly shaped ring (i.e., the first irregularly shaped ring or the second irregularly shaped ring mentioned below) to be rolled in the embodiments of this application will be described in detail: For example, Figure 1 This is a schematic diagram of the structure of the target irregular ring provided in the embodiments of this application. For example... Figure 1 As shown, the target irregular ring is a C-shaped cross-section irregular ring, and the upper and lower parts of the C-shaped cross-section irregular ring are symmetrical along the center line.

[0022] The upper or lower part may include a first diameter region (i.e., region a, which is a large diameter region), a second diameter region (i.e., region c, which is a small diameter region), and a transition region (i.e., region b) connecting the first diameter region and the second diameter region, the transition region having a conical slope form.

[0023] Optionally, the maximum diameter of the C-section irregular ring is 1500 mm.

[0024] Optionally, the material of the C-shaped cross-section irregular ring is TC4 alloy.

[0025] Optionally, the wall thickness of region c > the wall thickness of region a > the wall thickness of region b.

[0026] The radial rolling process of the aforementioned irregularly shaped ring (i.e., the rolling forming process of the ring blank) is an advanced precision forming process that utilizes the rotation of the drive roll and the radial feeding of the mandrel to cause the ring blank to undergo continuous rotation, resulting in wall thickness reduction, diameter expansion, and filling of complex cavities. The entire process, through precise control of metal flow, directly transforms a simple blank (i.e., the ring blank) into a ring with a complex cross-sectional shape, offering significant advantages such as high material utilization, dense internal structure, excellent mechanical properties, and near-net-shape forming. Initially, the drive roll rotates at a certain speed, driving the ring blank to rotate through friction, while the mandrel feeds linearly towards the centerline of the drive roll at a specific speed. As the mandrel continues to press in, the ring blank is forcibly bitten into the irregularly shaped closed cavity formed by the drive roll and the mandrel. Under the combined action of rotation and feeding, the ring blank wall thickness undergoes severe radial compression when passing through the micro-deformation zone. According to the law of constant volume, the compressed metal produces multi-directional flow: on the one hand, it flows tangentially, causing the diameter of the ring to expand significantly; on the other hand, due to the rigid constraint of the irregular hole sidewall, the metal is forced to flow along the axial direction and the cross-sectional profile to fill the complex cross-section with deep grooves.

[0027] Understandably, to investigate the influence of ring billets on the uniformity of deformation (i.e., the uniformity of strain distribution) during the rolling of C-section irregular rings, firstly, based on billet design principles, the outer diameter that ensures complete filling of the cross-section is determined. Secondly, three ring billets with equal outer diameter and volume but different shapes are selected. For example, Figure 2 This is a schematic diagram of the roll cross-section provided in an embodiment of this application. Figure 2 As can be seen, the three types of ring blanks include the simplest type with equal thickness, and two types with unequal thickness. Type a has only one raised area in the middle, with the greatest thickness, and thus has two areas of unequal thickness. Type b has three raised areas, similar to the C-shaped cross-section of the target irregular ring, with the raised areas on the upper and lower ends having the same thickness; therefore, this type of ring blank also has three areas of unequal thickness.

[0028] Optionally, in the finite element model construction of the radial rolling process of the target irregular ring, a thermo-mechanical coupling model was established based on the Deform-3D finite element platform and the rigid-visco-plastic finite element theory. Since ring rolling is a large plastic deformation process, the elastic deformation of the workpiece (i.e., the target irregular ring) is much smaller than its plastic deformation. The die stiffness of this workpiece is much greater than the stiffness of the ring blank at high temperatures. Therefore, to ensure computational accuracy and solution efficiency, it is assumed that the drive roller, core roller, and guide roller are considered rigid bodies, and the elastic deformation of these rigid bodies is ignored. The ring blank is defined as a deformable body capable of continuous flow. For mesh generation, the ring rolling process typically uses hexahedral elements, which can generate high-quality structured meshes. This regular topology better adapts to the geometric characteristics of rotating parts. More importantly, hexahedral elements have strong anti-distortion capabilities, effectively maintaining the element geometry during severe plastic deformation in radial rolling, avoiding computational non-convergence caused by excessive mesh distortion. Furthermore, this type of cell achieves a more uniform error distribution, ensuring the stability of the iterative solution process and enabling the simulation results to converge stably to the exact solution.

[0029] It should be noted that the selection of the material model needs to be determined based on the service conditions. In this embodiment, TC4 titanium alloy is selected as the research object. As a typical α+β two-phase titanium alloy, TC4 titanium alloy maintains high strength and creep resistance in a medium-temperature environment of 300℃~500℃ due to its excellent specific strength, good hot working performance, and excellent thermal stability. In this embodiment, the TC4 titanium alloy material model is directly used from the Design Environment for Forming (DEFORM) 3D material library. This TC4 titanium alloy material model not only includes thermophysical parameters such as Young's modulus, thermal conductivity, specific heat capacity, and coefficient of thermal expansion that change with temperature, but also has true stress-strain data describing the high-temperature deformation behavior of the material, which can effectively reflect the dynamic response characteristics of the material under complex thermo-mechanical coupling fields.

[0030] In the simulation of the ring blank rolling process described below, the diameters of the upper and lower ends of the drive roll and the diameter of the middle boss are 904 mm and 999.2 mm, respectively, with an overall height of 335.2 mm; the diameters of the upper and lower ends of the mandrel and the diameter of the middle boss are 450 mm and 378.2 mm, respectively, with an overall height of 332.2 mm. The ambient temperature is set to 20℃, the initial heating temperature of the ring blank is set to 940℃, the preheating temperature of the die is set to 300℃, and the heat transfer coefficient is configured as 5 N·s⁻¹·mm⁻¹·℃⁻¹, the thermal radiation coefficient as 0.7 N·s⁻¹·mm⁻¹·℃⁻¹, and the thermal convection coefficient as 0.02 N·s⁻¹·mm⁻¹·℃⁻¹. The numerical model of the target irregular ring part uses 400 hexahedral discrete elements, and the friction factor between the drive roll and the ring blank is set to 0.5, and the friction factor between the mandrel and the ring blank is set to 0.3. The motion control parameters define the drive roller speed as 1.5 rad / s; the core roller feed speed is divided into two stages. In this embodiment, the initial forming rolling stage is set before the diameter of the ring reaches 1200 mm, with a feed speed of 2 mm / s, while the feed speed in the subsequent shaping stage is 0.5 mm / s. Finally, the simulation termination criterion is that the maximum diameter of the ring reaches 1500 mm.

[0031] It should be noted that during the radial rolling process of the target irregular-shaped ring, the material flows circumferentially to fill the cross-sectional groove, causing the ring to deform with reduced wall thickness and increased diameter in various axial parts. The filling of the C-shaped irregular-shaped ring studied in this application is related to the area distribution of each axial segment of the intermediate ring blank after forming, affecting the axial material flow and the cross-sectional filling effect. During the radial rolling process of the C-shaped irregular-shaped ring, due to the active feeding of the mandrel, it first contacts the inner surface of the ring blank; the contact position is the starting point of plastic strain. Subsequently, under the combined action of the drive roll, mandrel, and tapered roll, the ring blank undergoes both radial wall thickness reduction and circumferential diameter expansion. Plastic strain is first generated in the contact area between the mandrel and the ring blank. As the mandrel continues to feed, the strain diffuses and accumulates along the contact area. Ring blanks with different initial geometric characteristics will exhibit different non-uniform deformation evolution patterns.

[0032] For example, combined Figure 2 , Figure 3 This is a schematic diagram of the strain distribution of an equal-thickness ring billet as its diameter increases during the rolling process, provided in an embodiment of this application. Figure 4 This is a schematic diagram of the strain distribution of a non-uniform thickness ring blank a during the rolling process as the diameter increases, provided in an embodiment of this application. Figure 5 This is a schematic diagram of the strain distribution of the non-uniform thickness ring blank b as its diameter increases during the rolling process, as provided in the embodiments of this application.

[0033] from Figure 3As can be seen, in the initial contact stage, as the diameter D increases from 702 mm to 802 mm, the mandrel first contacts the upper and lower regions of the inner surface of the ring blank. At this time, strain is generated in a localized area of ​​the inner diameter, such as... Figure 3 D is the green area shown in Figure 802. This is the direct action area where the mandrel presses into the ring blank during the feeding process. As the ring blank continues to rotate, this direct action area expands circumferentially, and the strain also diffuses circumferentially. Since the center of the ring blank has not yet made contact, no strain is generated at this time. On the other hand, the outer diameter of the ring blank is affected by the feeding action of the mandrel, and the point contact with the drive roller extends to surface contact, which also generates local strain. In the diameter expansion deformation stage, that is, the diameter D increases from 802 mm to 1200 mm, the mandrel continues to feed, the wall thickness of the ring blank continues to decrease, and the diameter continues to increase. As the diameter continues to grow, all inner diameter areas are in direct contact with the mandrel, and the outer diameter area is in contact with the drive roller, and the strain in each area continues to accumulate and increase. Due to the geometric symmetry of the uniform thickness ring blank, the strain distribution remains symmetrical overall, and the strain growth trend of the inner diameter and the outer diameter is consistent. In the later shaping stage, that is, the diameter D increases from 1200 mm to 1500 mm, at this time the cross-section is completely filled, which is the pure diameter growth stage. Within the overall ring, strain accumulation was most significant at the upper and lower end faces of the inner and outer diameters, but lowest in the middle of the ring. This is because the end face regions are directly constrained by the upper and lower tapered rollers, resulting in greater freedom of deformation in both the axial and radial directions. Conversely, the deformation in the middle region is less constrained by the tapered rollers due to its greater distance from them. Notably, in the transition zone b between regions a and c, the initial thickness of the uniform-thickness ring blank is larger, leading to a more pronounced strain distribution in this zone. This is the fundamental reason for the intense uneven deformation of the ring.

[0034] from Figure 4 It can be seen that in the initial contact stage when the diameter D increases from 702mm to 802mm, the strain state exhibited by the non-uniform thickness ring blank a is consistent with that of the uniform thickness ring blank. However, in the diameter expansion deformation stage when the diameter D increases from 802mm to 1200mm, the central region of the non-uniform thickness ring blank a contacts the core roller earlier. Therefore, the strain generation in the central region of the non-uniform thickness ring blank a occurs earlier than that in the central region of the uniform thickness ring blank. When the same diameter is reached, the overall strain in the central region of the inner diameter is higher. Since the thickness of the upper and lower ends of the non-uniform thickness ring blank a is less than that of the upper and lower ends of the uniform thickness ring blank under the same volume conditions, the strain on the upper and lower end faces of the non-uniform thickness ring blank a is less than that on the upper and lower end faces of the uniform thickness ring blank. In the later stabilization stage when the diameter D increases from 1200mm to 1500mm, the deformation also tends to stabilize. The overall strain distribution on the upper and lower end faces is constrained by the upper and lower tapered rollers and is consistent with that of the uniform thickness ring blank.

[0035] from Figure 5As can be seen, in the initial contact stage when the diameter D increases from 702mm to 802mm, the mandrel begins to contact the upper and lower ends of the inner surface of the ring. At this time, strain only occurs on the upper and lower end faces of the non-uniform thickness ring blank b. Because the thickness distribution of the uniform thickness ring blank and the non-uniform thickness ring blank a is smaller in this area, the non-uniform thickness ring blank b accumulates more strain in region a. When the diameter reaches 802mm, the middle of the inner diameter begins to contact the mandrel and generate strain. At this time, the outer diameter is affected by the feeding action of the mandrel, and the contact area between the middle of the ring blank and the drive roller changes from point to surface, while local strain is also generated. In the diameter expansion deformation stage when the diameter D increases from 802mm to 1200mm, as the mandrel continues to feed, the middle of the inner diameter and the upper and lower end faces all contact the mandrel and generate strain. In the later shaping stage when the diameter D increases from 1200mm to 1500mm, the diameter of the ring blank approaches the target value, and the deformation also tends to stabilize. It is worth noting that, compared with the uniform thickness ring blank and the non-uniform thickness ring blank a, since the thickness of regions a and c is larger, the thickness of the transition region b is smaller according to the principle of equal volume. The accumulated uneven deformation in this region is relatively less, which leads to a better uniformity of strain distribution in the overall ring.

[0036] comprehensive Figures 2-5 As shown, with the increase of the ring diameter, the strain distribution of the three types of ring blanks is affected by the contact constraints of the core roller, drive roller, and upper and lower tapered rollers, and the strain continues to accumulate at different times. The geometry of the middle ring blank is one of the key factors affecting the uniformity of strain distribution. Reasonably designing the thickness of each region of the non-uniform thickness ring blank is beneficial to improving the degree of uneven deformation of the overall ring.

[0037] It should be noted that the execution entity involved in the embodiments of this application can be a non-circular ring rolling system based on strain field uniformity evaluation, or it can be an electronic device. Optionally, the electronic device may include: a computer / laptop, a mobile terminal, a server, a cloud processor, or an integrated circuit module with data processing capabilities such as a programmable logic controller (PLC).

[0038] The following uses electronic devices as an example to illustrate in detail the rolling method for irregularly shaped rings based on strain field uniformity evaluation provided in the embodiments of this application: Figure 6 This is a schematic flowchart of the irregular ring rolling method based on strain field uniformity evaluation provided in the embodiments of this application. Figure 6 As shown, the method includes the following steps 601-605.

[0039] Step 601: Obtain multiple key influencing factors involved in the rolling forming process of the ring billet; and combine the multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors.

[0040] Among them, the ring blank refers to the blank used to roll complex irregular cross-section ring parts such as C-shaped cross-section. The geometric characteristics of the ring blank directly determine the rheological behavior of the metal in the subsequent rolling forming process.

[0041] Key influencing factors refer to a series of process parameters that can significantly alter the strain field distribution, affect material flow rate, and determine the final microstructure quality during the rolling process. Optionally, multiple key influencing factors may include at least the ring billet thickness, ring billet heating temperature, mandrel feed speed, drive roll speed, and contact friction between the mandrel and the ring billet.

[0042] Among them, the ring billet thickness involves the volume distribution of different regions of the non-uniform thickness ring billet and is the core geometric parameter for adjusting the local deformation; the ring billet heating temperature can determine the rheological stress and softening mechanism of the material and is constrained by the microstructure evolution of the material; the core roll feed speed is used to control the reduction and deformation per turn during the rolling process; the drive roll speed can affect the rotational inertia and deformation frequency of the ring billet; contact friction can determine the distribution of interfacial shear force and affect the width of the ring end face and the metal flow state.

[0043] It should be noted that each key influencing factor corresponds to multiple levels, and each level corresponds to a numerical value.

[0044] For example, in step 601, the electronic device first obtains several key influencing factors involved in the rolling process of the ring billet based on the actual working conditions. These key influencing factors are the ring billet thickness, ring billet heating temperature, mandrel feed speed, drive roll speed, and contact friction. Each key influencing factor corresponds to four levels, that is, four values, as shown in Table 1. Table 1: Based on Table 1, the electronic equipment can be tested using an orthogonal experimental method. The four values ​​corresponding to the five key influencing factors mentioned above are combined horizontally to obtain 16 sets of rolling data, as shown in Table 2. Table 2: As can be seen from Table 2, a set of rolling data can include a value corresponding to each of the five key influencing factors: ring billet thickness, ring billet heating temperature, mandrel feed speed, drive roll speed, and contact friction.

[0045] It should be noted that the orthogonal experimental method described above is suitable for experiments with numerous key influencing factors and long cycles. It can determine the influence patterns of each key influencing factor on the experimental indicators and select a level combination to determine the optimal combination of key influencing factors. The characteristic of this orthogonal experimental method is that it uses a representative subset of experiments to replace a large-scale comprehensive experiment. By analyzing the data from the selected representative experiments, the overall situation of the comprehensive experiment can be understood. Based on this, step 601 above, through the orthogonal experimental method, greatly reduces the number of experiments while ensuring sample representativeness, laying a data foundation for subsequent quantitative analysis of the impact of process factors on molding quality.

[0046] Optionally, before the electronic device acquires the multiple key influencing factors involved in the rolling process of the ring billet, the method may further include: the electronic device selecting a metal round bar (also known as a bar stock) whose material and technical requirements meet preset requirements as the original billet, the chemical composition and initial microstructure of which are the performance basis of the final product (i.e., the first shaped ring or the second shaped ring); the electronic device heating the original billet to the material forging temperature range to obtain a hot bar stock, which can improve the metal plasticity, reduce the deformation resistance, and make the material more prone to plastic flow. Cracking provides suitable thermoplastic conditions for the upsetting process; the electronic device upsets the hot bar stock by axial compression and radial upsetting to obtain the upset billet. This breaks up the coarse dendrites in the casting structure, forges the internal porosity and voids, and increases the cross-sectional area to provide the required billet size for subsequent punching; the electronic device then punches the upset billet, specifically by punching a through hole in the center of the upset billet with a punch, so that the upset billet becomes a hollow ring-shaped billet, establishing the necessary hollow geometric conditions for the ring rolling process.

[0047] It should be noted that the process of obtaining the ring blank described above can also be simulated.

[0048] Step 602: Simulate the rolling process of the ring billet using multiple sets of rolling data to obtain the first irregular ring corresponding to each set of rolling data, and determine the strain field of the first irregular ring.

[0049] Among them, the strain field refers to the spatial distribution of the equivalent strain and strain components generated at various points inside the ring billet during the rolling deformation process, and is used to quantitatively describe the deformation uniformity.

[0050] Step 603: Based on the uniformity of strain distribution in each of the multiple strain fields, calculate the contribution rate of each of the key influencing factors to the strain distribution of the irregular ring.

[0051] The uniformity of strain distribution, also known as strain distribution / strain variance, is a physical quantity used to characterize the differences in plastic deformation of various particles within the cross-section of an irregularly shaped ring.

[0052] The contribution rate refers to the proportion of the change of a specific key influencing factor on the fluctuation of the uniformity of strain distribution of irregular ring parts under the coupling effect of multiple process parameters, that is, the importance of the influence on the strain distribution of irregular ring parts.

[0053] For example, referring to Table 2 above, in steps 602-603, the electronic device uses the aforementioned 16 sets of rolling data to simulate the rolling forming process of the ring billet, obtaining the first irregular ring pieces corresponding to each of the 16 sets of rolling data, i.e., 16 first irregular ring pieces. Then, the strain field of each of these 16 first irregular ring pieces is obtained. For each strain field, multiple strain values ​​corresponding to the strain field can be determined, and the standard deviation of these multiple strain values ​​is used as the uniformity of strain distribution corresponding to the strain field. Based on this, the electronic device can finally determine 16 uniformities of strain distribution, as shown in Table 3: Table 3: Since the strain fields corresponding to different rolling data are different, it can be seen from Table 3 that the uniformity of strain distribution also varies for different rolling data. Next, the electronic device calculates the uniformity of all strain distributions to obtain the contribution rate of each of the five key influencing factors—ring billet thickness, ring billet heating temperature, mandrel feed speed, drive roll speed, and contact friction—to the strain distribution of the irregularly shaped ring.

[0054] The entire process described above, through quantitative analysis of the uniformity of strain distribution extracted from simulation, realizes the scientific transformation of process fluctuations into influencing weights, providing a quantitative decision-making basis for accurately identifying core optimization factors.

[0055] Understandably, the uniformity of strain distribution directly determines the uniformity of the microstructure and mechanical properties of the ring component. Excessive uniformity of strain distribution leads to a significant temperature rise and the risk of overheating, while insufficient uniformity makes it difficult to induce new recrystallization nucleation, inhibiting dynamic recrystallization and resulting in a mixed-grain structure where large grains surround small grains on the overall irregularly shaped ring component. Therefore, reducing the equivalent strain fluctuation range is crucial for improving the uniformity of strain distribution.

[0056] Optionally, the electronic device uses the first formula and the second formula to determine the uniformity of the strain distribution of the first irregular ring.

[0057] The first formula is: ; The second formula is: ; Represents the strain of any mesh element; This indicates the number of mesh elements in the finite element method. This represents the average strain value of all mesh elements.

[0058] It should be noted that the uniformity of strain distribution The smaller the value, the closer the strain value of all grid elements is to the average value, meaning that the strain is more uniformly distributed in space.

[0059] Following the law of equal volume, the dimensional parameters of a non-uniform thickness ring blank at four different volume distribution levels are quantitatively obtained by changing La and Lc, such as... Figure 7 As shown. Where La corresponds to Figure 1 Regions a and Lc correspond to Figure 1 Region c in the text.

[0060] In the radial rolling process of the target irregularly shaped ring, the mandrel performs a radial linear feed motion. Based on actual working conditions, the mandrel rapidly engages and initially shapes the ring in the early stage of deformation, using a relatively high speed to quickly reduce the wall thickness, reserving energy for subsequent deformation, while simultaneously improving efficiency and reducing surface temperature drop. In the later stage of deformation, to avoid elliptical or fishtail defects in the ring caused by excessively high feed speed and to prevent a sharp increase in rolling force, it is necessary to reduce the mandrel feed speed. Based on this, the following is given... Figure 8 The feed speeds of the core rollers are shown at four different levels when the outer diameter of the ring reaches 1200mm. That is, the feed speed is changed during the initial forming rolling stage before the diameter reaches 1200mm, and the feed speed is uniformly 0.5mm / s in the subsequent shaping stage.

[0061] The following simulations of the rolling process of the ring billet using multiple sets of rolling data are presented below, detailing the first irregularly shaped ring parts corresponding to each set of rolling data: In some embodiments, the electronic device simulates the rolling process of the ring billet using multiple sets of rolling data to obtain the first irregular ring piece corresponding to each set of rolling data. This may include: the electronic device using multiple sets of rolling data as a basis and employing a rectangular pre-rolling die to roll the ring billet into a ring with a rectangular cross-section; the electronic device using irregularly shaped rolls to perform preliminary adjustments on the ring and roll the ring into a third irregular billet, wherein the contour similarity between the third irregular billet and the first irregular ring piece corresponding to the rolling data is greater than a preset similarity threshold; and the electronic device using irregularly shaped rolls to perform secondary adjustments on the third irregular billet and roll the third irregular billet into the first irregular ring piece corresponding to the rolling data.

[0062] Alternatively, the rectangular pre-rolling die may include a flat roll or a simple die type, etc.

[0063] In the embodiments of this application, the following operations are performed for each set of rolling data: The electronic device first heats the rectangular pre-rolling die before use based on the rolling data. This allows the ring billet to become plastic, compensates for work hardening, and ensures that the temperature is within the optimal process window when the material enters a more complex irregular deformation stage, preventing excessive deformation resistance or die damage due to excessively low temperature. The electronic device then uses the rectangular pre-rolling die to roll the ring billet into a ring with a rectangular cross-section. Through cumulative plastic deformation, the grains are further refined, initial processing defects are eliminated, and the uniformity of the material structure is improved.

[0064] Next, the electronic device heats the customized irregular roll and returns the ring to the hot forging temperature to adapt to the subsequent deformation of complex irregular ring parts, avoiding incomplete filling of the cross section and rolling cracks. The electronic device then uses the irregular roll to make preliminary adjustments to the ring and rolls the ring into a third irregular blank that is close to the finished product outline, so as to complete the preliminary forming from regular shape to complex irregular shape and improve the uneven deformation of the subsequent final rolling.

[0065] Subsequently, the electronic device heats the irregularly shaped roll to eliminate pre-rolling work hardening, providing precise and uniform thermoplastic conditions for final rolling and ensuring high-precision forming. The electronic device then uses the same irregularly shaped roll to perform a second adjustment on the third irregularly shaped billet, which is also the final precision rolling pass. This third irregularly shaped billet is rolled into the first irregularly shaped ring corresponding to the rolling data. This is the stage with the highest forming accuracy requirements, where the metal undergoes complex localized plastic flow, ultimately achieving the precise cross-sectional shape required by the design drawings. It should be noted that this final step effectively corrects previous deviations, significantly reducing the cumulative dimensional errors of previous processes such as upsetting, punching, and pre-rolling. Furthermore, it further refines the grains, improves microstructure uniformity, and enhances the overall mechanical properties of the ring.

[0066] The above process is the specific manufacturing process path of the first irregular ring part. Through the step-by-step process path of rectangular pre-rolling, irregular graded forming, and hot internal pressure expansion, the precise control of complex cross-section from large deformation coordination to precision shaping is realized, effectively eliminating the cumulative dimensional error between processes, and ensuring the uniformity of the structure and dimensional accuracy of the final formed part while refining the grains.

[0067] The following section elaborates on the calculation of the contribution rate of several key influencing factors to the strain distribution of irregularly shaped ring components based on the uniformity of strain distribution in multiple strain fields: In some embodiments, the electronic device calculates the contribution rate of multiple key influencing factors to the strain distribution of the irregularly shaped ring based on the uniformity of strain distribution in each of the multiple strain fields. This may include: the electronic device acquiring a first mean value corresponding to the uniformity of strain distribution in each of the multiple strain fields; for each key influencing factor, the electronic device acquiring a second mean value corresponding to the uniformity of strain distribution in each of the multiple strain fields for different values ​​under the key influencing factor; acquiring the squared differences between the multiple second mean values ​​and the first mean value; obtaining the sum of squared deviations corresponding to the key influencing factor based on the first sum of the multiple squared differences and the number of experiments for each value under the key influencing factor; and determining the contribution rate of each key influencing factor to the strain distribution of the irregularly shaped ring based on the sum of squared deviations corresponding to each of the multiple key influencing factors.

[0068] The second degree mean is a result of an analysis of variance.

[0069] For example, referring to Table 3, the electronic device first obtains the first degree mean value corresponding to the uniformity of strain distribution of each of the above 16 first irregular ring parts. The calculation formula of the first degree mean value is: K=(1.740+1.400+1.490+1.430+1.830+2.080+0.740+0.784+1.390+0.750+1.360+0.753+0.673+0.664+0.926+1.183) / 16=1.1996, where K represents the first degree mean value.

[0070] Regarding the key influencing factor of the ring billet thickness, the electronic device acquires the first sub-level mean K1 corresponding to the four strain distribution uniformity levels corresponding to the value 66. The calculation formula for the first sub-level mean K1 is: K1 = (1.740 + 1.400 + 1.490 + 1.430) / 4 = 1.515. Similarly, the electronic device acquires the second sub-level mean K2 = 1.3585 corresponding to the four strain distribution uniformity levels corresponding to the value 70, the third sub-level mean K3 = 1.0633 corresponding to the four strain distribution uniformity levels corresponding to the value 74, and the fourth sub-level mean K4 = 0.8615 corresponding to the four strain distribution uniformity levels corresponding to the value 78. Among them, the second level mean corresponding to the ring billet thickness includes 1.515, 1.3585, 1.0633, and 0.8615. As can be seen from Table 3, the number of experiments for each value is 4. At this time, the electronic device calculates the sum of squared deviations corresponding to the ring billet thickness. , where the sum of squared deviations The calculation formula is: = ; Referring to the aforementioned calculation process for the ring billet thickness, and considering the key influencing factor of the ring billet heating temperature, the electronic device obtained the second-degree mean values ​​corresponding to the ring billet heating temperature, which included 1.408, 1.2235, 1.129, and 1.0375. The sum of squared deviations corresponding to these ring billet heating temperatures... ; Regarding the key influencing factor of the core roll feed speed, the electronic device obtained the second-order mean values ​​corresponding to the core roll feed speed, which included 1.5908, 1.2273, 1.0820, and 0.8983. The sum of squared deviations corresponding to this core roll feed speed... ; Regarding the key influencing factor of drive roller speed, the electronic device obtained the second-order mean values ​​corresponding to the drive roller speed, including 0.9743, 1.0543, 1.3133, and 1.4565, and the sum of squared deviations corresponding to the drive roller speed. ; Regarding contact friction, a key influencing factor, the electronic device obtained the second-degree mean values ​​corresponding to contact friction of 1.0500, 1.1783, 1.2490, and 1.3210, and the sum of squared deviations corresponding to this contact friction. It should be noted that the mean of the second degree for each of the five key influencing factors mentioned above is as follows: Figure 9 As shown.

[0071] Finally, the electronic device is determined based on the sum of squared deviations corresponding to each of these five key influencing factors, i.e. , , , and The contribution rate of each of the five key influencing factors to the strain distribution of the irregular ring component was determined, and the specific process is as follows: In some embodiments, the electronic device determines the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring component based on the sum of squares of deviations corresponding to each of the multiple key influencing factors. This may include: the electronic device acquiring a second sum value corresponding to the sum of squares of deviations corresponding to each of the multiple key influencing factors; and for each key influencing factor, the electronic device using the ratio of the sum of squares of deviations corresponding to the key influencing factor to the second sum value as the contribution rate of the key influencing factor to the strain distribution of the irregular ring component.

[0072] In this embodiment of the application, the electronic device obtains the second sum value corresponding to the sum of squared deviations of the above five key influencing factors. The second sum The calculation formula is: + + + + =2.452; The electronic device will / =42.01% is taken as the contribution rate of the ring blank thickness to the strain distribution of the irregular ring; / =12.28% is taken as the contribution rate of the ring blank heating temperature to the strain distribution of the irregular ring; / =42.15% is taken as the contribution rate of the core roller feed speed to the strain distribution of the irregular ring; / =24.60% is taken as the contribution rate of the driving roller speed to the strain distribution of the irregular ring; / =6.53% is considered as the contribution rate of contact friction to the strain distribution of the irregularly shaped ring. It should be noted that the contribution rates of the above five key influencing factors to the strain distribution of the irregularly shaped ring are as follows: Figure 10 As shown.

[0073] Understandably, from Figure 9 It can be seen that the uniformity of strain distribution decreases with increasing ring billet thickness, ring billet heating temperature, and core roll feed speed, and increases with increasing drive roll speed and contact friction. Figure 9 and Figure 10 As can be seen, the influence trends and contribution rates of different process parameters on the uniformity of strain distribution during ring billet rolling differ significantly, as detailed below: The effect of billet thickness on the strain distribution of irregularly shaped rings: As the billet thickness increases from 66 mm to 78 mm, the uniformity of strain distribution decreases from 1.515 to 0.8615. It should be noted that because the thickness in the middle of the billet is greater, the thickness of the upper and lower end faces La is smaller. During rolling, less material is subjected to forced rolling deformation due to the contact constraint of the upper and lower tapered rolls, reducing strain concentration caused by excessive deformation in local areas of the upper and lower end faces. At the same time, more initial material volume is distributed in the middle region of the billet, promoting further plastic deformation in this region and reducing the deformation difference between region a and region c of the ring. Therefore, increasing the billet thickness is beneficial to reducing the degree of uneven deformation of the overall irregularly shaped ring.

[0074] The effect of billet heating temperature on the strain distribution of irregularly shaped rings: As the billet heating temperature increases from 900℃ to 960℃, the uniformity of strain distribution decreases from 1.408 to 1.0375. It should be noted that this is because the initial temperature increases, significantly reducing the material's yield strength and flow stress. Under the same rolling force or feed per revolution, the metal is more prone to plastic flow, and deformation energy is transferred more deeply to the core of the irregularly shaped ring. The equivalent strain difference from the surface to the core decreases, and the distribution tends to be more uniform. When the billet heating temperature increases from 900℃ to 960℃, the thermal activation effect of the metal is significantly enhanced, and the atomic migration ability is improved, leading to a significant decrease in the yield strength and flow stress of the irregularly shaped ring. The depth and efficiency of deformation energy transfer are significantly improved, allowing the core material to participate more fully in plastic flow. The strain caused by contact friction and concentrated deformation on the surface is also transferred to the core, making the overall strain more uniform.

[0075] The effect of mandrel feed speed on the strain distribution of irregularly shaped rings: When the mandrel feed speed increased from 0.5 mm / s to 2 mm / s in the initial forming stage, the uniformity of strain distribution decreased from 1.5908 to 0.8983. It should be noted that this is because, with a fixed drive roll speed, increasing the mandrel feed speed increases the feed per revolution. The larger single deformation allows plastic deformation to penetrate deeper into the ring blank surface, extending from the surface to the core. During multi-turn rolling, the core material also undergoes effective cumulative deformation, thereby reducing the strain difference between the surface and core materials. Furthermore, increasing the mandrel feed speed shortens the local contact time between the mandrel and specific areas of the ring blank, reducing strain concentration caused by contact friction and localized temperature rise, thus contributing to a more uniform deformation field.

[0076] The effect of drive roll speed on the strain distribution of irregularly shaped rings: When the drive roll speed increases from 1.5 rad / s to 3 rad / s, the uniformity of strain distribution increases from 0.9743 to 1.4565. It should be noted that this is because the increase in drive roll speed represents an increase in the ring's rotational linear velocity, leading to a decrease in the feed per revolution and a shallower degree of deformation per rolling pass. More deformation energy is consumed in the surface material directly in contact with the die, increasing the difficulty of deformation penetrating to the center of the ring. The effective transfer of deformation energy to the core is reduced, resulting in insufficient deformation of the core material. However, the excessive strain concentration in the surface material increases the strain gradient of the ring cross-section, thereby exacerbating the degree of uneven deformation.

[0077] The effect of contact friction on the strain distribution of irregularly shaped rings: When the contact friction increases from 0.3 to 0.6, the uniformity of strain distribution increases from 1.0500 to 1.3210. It should be noted that this is because when the contact friction is low, deformation energy can be transferred relatively smoothly through the inner wall of the ring to the core of the ring blank; while when the contact friction is high, most of the energy is consumed in overcoming surface friction and generating shear, making it difficult for the radial pressing force of the mandrel per revolution to effectively penetrate to the core of the ring blank. Therefore, increasing contact friction hinders the radial flow of material, causing deformation to concentrate more on the surface. As the number of rolling revolutions increases, the surface metal undergoes repeated shearing, and strain continues to accumulate on the surface; while the core metal, due to the ineffective penetration of the feed per revolution, experiences a very small strain increment, exacerbating the non-uniformity of deformation.

[0078] Step 603: Rank the multiple key influencing factors according to their contribution rates; and iterate through the current key influencing factors in descending order of importance. Based on the uniformity of the multiple strain distributions corresponding to the current key influencing factors, determine the optimal value from the multiple values ​​corresponding to the current key influencing factors.

[0079] For example, in step 603, the electronic device can first rank the five key influencing factors according to their contribution rates, specifically: ring billet thickness ≈ core roller feed speed > drive roller speed > ring billet heating temperature > contact friction. Then, the electronic device traverses the current key influencing factors in descending order of importance, calculates the uniformity of strain distribution corresponding to different values ​​of the current key influencing factor, and determines the optimal value corresponding to the current key influencing factor from the multiple values ​​corresponding to the current key influencing factor. Based on this, the electronic device can finally determine the optimal values ​​corresponding to each of the five key influencing factors. The entire process, through the strategy of "contribution rate ranking + step-by-step traversal optimization," achieves orderly decoupling of the complex multivariable system, ensuring that while prioritizing the optimization of core process parameters, secondary factors are also considered, thereby accurately locking in the globally optimal process combination that makes the strain distribution of the irregular ring part most uniform.

[0080] It should be noted that the above ranking is determined by the mechanisms of action of each key influencing factor and the range of the selected factors. Among them, the key influencing factor, as the geometric constraint condition in the ring rolling process, directly limits the radial and axial flow paths of the material, and is a direct condition determining the material flow uniformity and the contact time between the rolls and dies. The core roll feed speed affects stress transfer efficiency by controlling the total ring rolling process time, and dominates the penetration depth of the plastic deformation zone, becoming a core parameter affecting strain uniformity. The influence of the drive roll speed runs through the entire rolling process. Specifically, by determining the rolling linear speed and the strain rate in the deformation zone, it not only controls the thermo-mechanical coupling effect within the rolling cycle, but also affects the residence time of the material in the deformation zone, thereby indirectly changing the strain distribution state, and also has a high contribution rate. Regarding the ring billet heating temperature, since a suitable hot working temperature range below the phase transformation point can be selected (to set the temperature constraint range), the material plasticity is at a relatively high level, so the contribution rate of the ring billet heating temperature is not significant. Since contact friction only acts on the local contact interface of the inner wall of the ring blank, the contact range is small, and the surface of the ring blank is oxidized under hot conditions, the influence of contact friction is less than that of other key influencing factors.

[0081] In some embodiments, when the current key influencing factor is one of the four key influencing factors—ring blank thickness, mandrel feed speed, drive roll speed, and contact friction between the mandrel and the ring blank—the electronic device determines the optimal value from multiple values ​​corresponding to the current key influencing factor based on multiple strain distribution uniformity levels. This can include: the electronic device acquiring the third-degree mean values ​​corresponding to multiple strain distribution uniformity levels for different values ​​under the current key influencing factor, and determining the minimum value among multiple third-degree mean values; the electronic device then determines the value corresponding to the minimum value from the multiple values ​​corresponding to the current key influencing factor, and uses this value as the optimal value corresponding to the current key influencing factor.

[0082] For example, when the current key influencing factor is the ring blank thickness, the average values ​​of the third degree of strain distribution uniformity corresponding to the four values ​​of the ring blank thickness (66mm, 70mm, 74mm, and 78mm) are 1.515, 1.3585, 1.0633, and 0.8615, respectively. Then, the electronic device takes the value of 78mm, which corresponds to 0.8615, as the optimal value for the ring blank thickness. With the core roller feed speed being the key influencing factor, the average values ​​of the third degree of strain distribution uniformity corresponding to the four core roller feed speed values ​​of 1mm / s, 1.5mm / s, 2mm / s, and 2.5mm / s are 1.5908, 1.2273, 1.0820, and 0.8983, respectively. Then, the electronic device takes the value of 2.5mm / s corresponding to 0.8983 as the optimal value for the core roller feed speed. With the current key influencing factor being the drive roller speed, the average values ​​of the third degree of strain distribution uniformity corresponding to the four values ​​of 1.5 rad / s, 2 rad / s, 2.5 rad / s, and 3 rad / s for the drive roller speed are 0.9743, 1.0543, 1.3133, and 1.4565, respectively. Then, the electronic device takes the value of 1.5 rad / s corresponding to 0.9743 as the optimal value for the drive roller speed. Given that the key influencing factor is contact friction, the four values ​​corresponding to this contact friction (0.3, 0.4, 0.5, and 0.6) have the following average values ​​for the third degree of strain distribution uniformity: 1.0500, 1.1783, 1.2490, and 1.3210, respectively. The electronic device then selects the value 0.3, corresponding to 1.0500, as the optimal value for this contact friction.

[0083] In some embodiments, when the current key influencing factor is the ring billet heating temperature, the electronic device determines the optimal value from multiple values ​​corresponding to the current key influencing factor based on the uniformity of multiple strain distributions corresponding to the current key influencing factor. This can include: the electronic device setting a temperature constraint range, the temperature constraint range being based on the criteria of suppressing Widmanstätten structure and avoiding surface over-oxidation behavior during the rolling process of the ring billet, and the upper limit of the temperature constraint range being lower than the β phase transformation point of the ring billet material; the electronic device acquiring the fourth degree mean value corresponding to multiple strain distribution uniformities at different values ​​within the temperature constraint range; and the electronic device selecting the value with the smallest fourth degree mean value that meets the Widmanstätten structure suppression requirement from the values ​​covered by the temperature constraint range as the optimal value corresponding to the ring billet heating temperature.

[0084] For example, when the key influencing factor is the ring billet heating temperature, a higher heating temperature is not necessarily better. Assuming the β-phase transformation point of the ring billet material is 980℃, Criterion 1 (Suppressing Widmanstätten Structure): The rolling temperature must be below the phase transformation point, with a certain safety margin (e.g., 20℃) to prevent localized overheating due to uneven induction heating. Therefore, the upper limit is set at 960℃. Criterion 2 (Avoiding Over-Oxidation): Above 950℃, the oxide scale formation rate increases exponentially. Considering all factors, the electronic device sets a temperature constraint range [900℃, 940℃], treating 960℃ as a risk zone for focused monitoring or elimination. At this point, the three ring billet heating temperatures of 900℃, 920℃, and 940℃ satisfy this temperature constraint range, and the average values ​​of the fourth degree of uniformity of the four strain distributions corresponding to each are 1.408, 1.2235, and 1.129, respectively. Then, the electronic device takes the value 940℃ corresponding to 1.129 as the optimal value for the ring billet heating temperature.

[0085] Step 604: Take the optimal values ​​corresponding to each of the multiple key influencing factors as a set of optimal rolling data; and use the optimal rolling data to simulate the rolling forming process of the ring billet to obtain the second irregular ring part.

[0086] For example, in step 604, the electronic device can use the optimal value of 78mm corresponding to the ring billet thickness, the optimal value of 940℃ corresponding to the ring billet heating temperature, the optimal value of 2.5mm / s corresponding to the core roll feed speed, the optimal value of 1.5rad / s corresponding to the drive roll speed, and the optimal value of 0.3 corresponding to the contact friction as a set of optimal rolling data. Then, the electronic device uses the optimal rolling data to simulate the rolling forming process of the ring billet to obtain the second irregular ring. It should be noted that the simulation process of the second irregular ring is similar to the simulation process of each of the first irregular rings described above, and will not be described in detail here.

[0087] Based on this, the electronic device can determine the uniformity of strain distribution in the second irregularly shaped ring. For example, Figure 11 This is a schematic diagram illustrating the uniformity of strain distribution among the various irregularly shaped ring components provided in the embodiments of this application. From Figure 11 It can be seen that the uniformity of strain distribution in each of the 16 first irregularly shaped rings and the uniformity of strain distribution in the aforementioned second irregularly shaped ring (i.e., Figure 11 In the preferred strain distribution shown, the uniformity of the strain distribution of the second irregular ring is less than that of each of the 16 first irregular rings. Furthermore, a comparison of the strain field contour maps of serial numbers 6 and 16 clearly shows the difference in strain distribution, further confirming that the second irregular ring has better strain distribution uniformity.

[0088] For example, Figure 12This is a schematic diagram of the physical structure of the second irregularly shaped ring provided in an embodiment of this application. Figure 12 Based on the second irregularly shaped ring shown, samples were cut from the second irregularly shaped ring, and room temperature tensile properties such as radial and axial elongation, reduction of area, tensile strength, and yield strength were tested. The results are as follows. Figure 13 As shown. From Figure 13 As can be seen from the data, the tensile strength of the second irregular ring is around 950 MPa, exceeding the standard requirement of 900 MPa; while the yield strength is 875 MPa to 915 MPa, the elongation is 15% to 17%, and the reduction of area is 44% to 45%, all of which are higher than the minimum acceptance standard shown by the red dotted line.

[0089] Optionally, the electronic device simulates the rolling process of the ring billet using optimal rolling data to obtain a second irregularly shaped ring, including: simulating the rolling process of the ring billet using optimal rolling data to obtain a fourth irregularly shaped ring; heating the fourth irregularly shaped billet to a suitable temperature for thermal expansion (such as a preset temperature) to ensure plastic flow capacity and temperature uniformity, avoiding uneven expansion deformation; then using a rolling die to increase the diameter and decrease the wall thickness of the fourth irregularly shaped billet during the deformation process, obtaining the second irregularly shaped ring. The entire process completes the final finishing of the contour, outer diameter, and wall thickness, eliminating rolling deviations, improving surface finish and dimensional accuracy, and achieving the final forming of the finished product, i.e., obtaining the aforementioned second irregularly shaped ring.

[0090] In the embodiments of this application, the technical solutions described in steps 601-604 above combine multi-key influencing factor combination simulation with quantitative evaluation of contribution rate based on strain field, overcoming the limitation of traditional single-factor analysis that cannot take into account the influence of parameter coupling. In addition, by sorting the key influencing factors according to their importance and traversing to determine the optimal values, a set of optimal rolling data is constructed, ensuring the targeted control of the radial and axial rolling of the ring, significantly improving the uniformity of strain distribution of the irregular ring, and enabling plastic deformation to effectively penetrate to the core, fundamentally solving the quality bottleneck of large cross-sectional strain gradient and uneven microstructure, achieving global optimization of forming quality, and finally obtaining irregular rings with better forming quality.

[0091] Furthermore, based on the Deform-3D finite element platform, the above technical solution investigated the non-uniform deformation law of the target irregular ring part made of TC4 titanium alloy and the influence trend of multiple key influencing factors. An orthogonal experimental method was designed to conduct a significance analysis of different key influencing factors, obtaining optimal process and ring blank parameters to obtain a second irregular ring part with better forming quality. The main conclusions are as follows: (1) The influence of the initial ring blank geometry on the uniformity of strain distribution was revealed. The results show that by improving the thickness distribution of each region of the non-uniform thickness ring blank, the uniformity of strain distribution can be significantly improved. When the thickness of the middle part of the ring blank increases from 66 mm to 78 mm, the uniformity of strain distribution is significantly improved. The value decreased from 1.515 to 0.8615, a reduction of 43.1%, indicating that increasing the volume in the middle of the ring blank and reducing the volume at the top and bottom ends can effectively improve the uniformity of the strain distribution of the entire ring.

[0092] (2) The influence weights and mechanisms of rolling process parameters on the uniformity of strain distribution were clarified. Contribution rate analysis based on orthogonal experiments showed that the order of influence of each key influencing factor on the uniformity of strain distribution was: ring billet thickness ≈ mandrel feed speed > drive roll speed > ring billet heating temperature > contact friction. Specifically, when the mandrel feed speed increased from 0.5 mm / s to 2 mm / s, the uniformity of strain distribution... The value decreased from 1.5908 to 0.8983, a drop of 43.6%, indicating that appropriately increasing the core roller feed speed can enhance deformation penetration, reduce the strain gradient between the surface and the core, and promote uniform strain distribution.

[0093] (3) A better combination of parameters (i.e., optimal rolling data) was proposed to improve the rolling uniformity of C-section irregular rings. Through comprehensive simulation and experimental verification, the optimal combination within the selected parameter range was found to be: the optimal value for ring billet thickness (78 mm), the optimal value for ring billet heating temperature (940℃), the optimal value for core roll feed speed (2.5 mm / s), the optimal value for drive roll speed (1.5 rad / s), and the optimal value for contact friction (0.3). The uniformity of strain distribution corresponding to this optimal rolling data was... The strain distribution uniformity of each of the 16 first irregular ring parts is less than that of the individual ring parts, which improves the overall strain distribution uniformity of the ring parts and provides a theoretical basis and process guidance for the precision rolling of titanium alloy irregular ring parts.

[0094] The following describes the irregular ring rolling system based on strain field uniformity evaluation provided in the embodiments of this application. The irregular ring rolling system based on strain field uniformity evaluation described below can be referred to in correspondence with the irregular ring rolling method based on strain field uniformity evaluation described above.

[0095] Figure 14 This is a schematic diagram of the irregular ring rolling system based on strain field uniformity evaluation provided in an embodiment of this application. Figure 14 As shown, the system includes: a data acquisition module 1401, a data processing module 1402, and a rolling simulation module 1403.

[0096] The data acquisition module 1401 is used to acquire multiple key influencing factors involved in the rolling and forming process of the ring billet; The data processing module 1402 is used to combine the multiple values ​​corresponding to the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors. The rolling simulation module 1403 is used to simulate the rolling forming process of the ring billet using the multiple sets of rolling data, obtain the first irregular ring corresponding to each of the multiple sets of rolling data, and determine the strain field of the first irregular ring. The data processing module 1402 is also used to calculate the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring based on the uniformity of strain distribution of each of the multiple strain fields; to sort the multiple key influencing factors by importance based on the multiple contribution rates; to traverse the current key influencing factors in descending order of importance; to determine the optimal value from the multiple values ​​corresponding to the current key influencing factor based on the uniformity of strain distribution of the current key influencing factor; and to take the optimal values ​​corresponding to each of the multiple key influencing factors as a set of optimal rolling data. The rolling simulation module 1403 is also used to simulate the rolling forming process of the ring billet using the optimal rolling data to obtain the second irregular ring.

[0097] Optionally, the data processing module 1402 is specifically used to obtain the first degree mean corresponding to the uniformity of strain distribution of each of the multiple strain fields; for each key influencing factor, to obtain the second degree mean corresponding to the uniformity of strain distribution of each of the multiple strain distributions corresponding to different values ​​under the key influencing factor; to obtain the squared differences between the multiple second degree mean and the first degree mean; to obtain the sum of squared deviations corresponding to the key influencing factor based on the first sum of the multiple squared differences and the number of experiments for each value under the key influencing factor; and to determine the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring based on the sum of squared deviations corresponding to each of the multiple key influencing factors.

[0098] Optionally, the data processing module 1402 is specifically used to obtain the second sum value corresponding to the sum of squares of deviations of each of the multiple key influencing factors; for each key influencing factor, the ratio of the sum of squares of deviations of the key influencing factor to the second sum value is used as the contribution rate of the key influencing factor to the strain distribution of the irregular ring.

[0099] Optionally, if the current key influencing factor is one of the four key influencing factors: ring blank thickness, core roller feed speed, drive roller speed, and contact friction between the core roller and the ring blank, the data processing module 1402 is specifically used to obtain the third-degree mean value corresponding to the multiple strain distribution uniformity levels under different values ​​of the current key influencing factor, and determine the minimum value among the multiple third-degree mean values; from the multiple values ​​corresponding to the current key influencing factor, determine the value corresponding to the minimum value, and use it as the optimal value corresponding to the current key influencing factor.

[0100] Optionally, when the current key influencing factor is the heating temperature of the ring billet, the data processing module 1402 is specifically used to set a temperature constraint range. The temperature constraint range is based on the criteria of suppressing Widmanstätten structure and avoiding surface over-oxidation behavior during the rolling process of the ring billet, and the upper limit of the temperature constraint range is lower than the β phase transformation point of the ring billet material. The module obtains the fourth degree mean value corresponding to the uniformity of multiple strain distributions at different values ​​of the ring billet heating temperature within the temperature constraint range. From the values ​​covered by the temperature constraint range, the value with the smallest fourth degree mean value that meets the Widmanstätten structure suppression requirement is selected as the optimal value corresponding to the ring billet heating temperature.

[0101] Optionally, the rolling simulation module 1403 is specifically used to, based on the multiple sets of rolling data, use a rectangular pre-rolling die to roll the ring billet into a ring with a rectangular cross-section; use a shaped roll to perform preliminary adjustment on the ring and roll the ring into a third shaped billet, wherein the contour similarity between the third shaped billet and the first shaped ring corresponding to the rolling data is greater than a preset similarity threshold; and use a shaped die roll to perform secondary adjustment on the third shaped billet and roll the third shaped billet into the first shaped ring corresponding to the rolling data.

[0102] Optionally, the first irregular ring or the second irregular ring is a C-shaped cross-section irregular ring. The upper and lower parts of the C-shaped cross-section irregular ring are symmetrical along the center line. The upper or lower part includes a first diameter area, a second diameter area, and a transition area connecting the first diameter area and the second diameter area. The transition area has a tapered slope.

[0103] Figure 15 This is a schematic diagram of the structure of the electronic device provided in an embodiment of this application. For example... Figure 15As shown, the electronic device may include: a processor 1510, a communication interface 1520, a memory 1530, and a communication bus 1540, wherein the processor 1510, the communication interface 1520, and the memory 1530 communicate with each other through the communication bus 1540. The processor 1510 can call logic instructions in the memory 1530 to execute a method for rolling irregularly shaped rings based on strain field uniformity evaluation. The method includes: acquiring multiple key influencing factors involved in the rolling process of the ring billet; combining multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; simulating the rolling process of the ring billet using the multiple sets of rolling data to obtain a first irregularly shaped ring corresponding to each of the multiple sets of rolling data, and determining the strain field of the first irregularly shaped ring; and based on the multiple strain fields... The contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring is calculated based on the uniformity of their respective strain distributions. The multiple key influencing factors are then ranked by importance based on their contribution rates. The current key influencing factors are then iterated in descending order of importance, and the optimal value is determined from the multiple values ​​corresponding to each key influencing factor based on the uniformity of their strain distributions. The optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data. The rolling process of the ring billet is simulated using the optimal rolling data to obtain the second irregular ring.

[0104] Furthermore, the logical instructions in the aforementioned memory 1530 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0105] On the other hand, this application also provides a computer program product, which includes a computer program that can be stored on a non-transitory computer-readable storage medium. When the computer program is executed by a processor, the computer can execute the rolling method for irregularly shaped rings based on strain field uniformity evaluation provided by the above methods. This method includes: acquiring multiple key influencing factors involved in the rolling process of the ring billet; combining multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; and simulating the rolling process of the ring billet using the multiple sets of rolling data to obtain the values ​​of each set of rolling data. The first irregularly shaped ring is determined, and its strain field is identified. Based on the uniformity of strain distribution in each strain field, the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring is calculated. The multiple key influencing factors are ranked by importance based on their contribution rates. The current key influencing factors are traversed in descending order of importance, and the optimal value is determined from the multiple values ​​corresponding to the current key influencing factors based on the uniformity of strain distribution. The optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data. The rolling process of the ring blank is simulated using the optimal rolling data to obtain the second irregularly shaped ring.

[0106] In another aspect, embodiments of this application also provide a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, this computer program implements the above-described method for rolling irregularly shaped rings based on strain field uniformity evaluation. This method includes: acquiring multiple key influencing factors involved in the rolling process of the ring billet; combining multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; simulating the rolling process of the ring billet using the multiple sets of rolling data to obtain a first irregularly shaped ring corresponding to each of the multiple sets of rolling data, and determining the... The strain field of the first irregularly shaped ring is described; based on the uniformity of strain distribution in each strain field, the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring is calculated; based on the multiple contribution rates, the multiple key influencing factors are ranked by importance; and the current key influencing factors are traversed in descending order of importance. Based on the uniformity of strain distribution corresponding to the current key influencing factor, the optimal value is determined from the multiple values ​​corresponding to the current key influencing factor; the optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data; and the rolling forming process of the ring billet is simulated using the optimal rolling data to obtain the second irregularly shaped ring.

[0107] The system embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0108] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0109] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application 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. Such 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 this application.

Claims

1. A method for rolling irregularly shaped rings based on strain field uniformity evaluation, characterized in that, include: To identify several key influencing factors involved in the rolling and forming process of ring billets; The multiple values ​​corresponding to each of the multiple key influencing factors are combined to obtain multiple sets of rolling data, and each set of rolling data includes one value corresponding to each of the multiple key influencing factors. The rolling process of the ring billet is simulated using the multiple sets of rolling data to obtain the first irregular ring corresponding to each set of rolling data, and the strain field of the first irregular ring is determined. Based on the uniformity of strain distribution in each of the multiple strain fields, the contribution rate of each of the key influencing factors to the strain distribution of the irregular ring is calculated. The importance of the key influencing factors is ranked according to their contribution rates. The current key influencing factors are traversed in descending order of importance. Based on the uniformity of the strain distribution corresponding to the current key influencing factors, the optimal value is determined from the multiple values ​​corresponding to the current key influencing factors. The optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data. The rolling process of the ring blank was simulated using the optimal rolling data to obtain the second irregular ring.

2. The rolling method for irregularly shaped rings based on strain field uniformity evaluation according to claim 1, characterized in that, The calculation of the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregularly shaped ring component based on the uniformity of strain distribution in each of the multiple strain fields includes: Obtain the first mean value corresponding to the uniformity of strain distribution of each of the multiple strain fields; For each key influencing factor, the second degree mean corresponding to the uniformity of multiple strain distributions under different values ​​of the key influencing factor is obtained; the squared differences between the multiple second degree mean and the first degree mean are obtained; based on the first sum of the multiple squared differences and the number of experiments for each value under the key influencing factor, the sum of squared deviations corresponding to the key influencing factor is obtained. Based on the sum of squared deviations of each of the multiple key influencing factors, the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring is determined.

3. The rolling method for irregularly shaped rings based on strain field uniformity evaluation according to claim 2, characterized in that, The step of determining the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring component based on the sum of squared deviations corresponding to each of the multiple key influencing factors includes: Obtain the second sum value corresponding to the sum of squared deviations of each of the multiple key influencing factors; For each of the key influencing factors, the ratio of the sum of squared deviations corresponding to the key influencing factors to the second sum value is taken as the contribution rate of the key influencing factors to the strain distribution of the irregular ring.

4. The method for rolling irregularly shaped rings based on strain field uniformity evaluation according to any one of claims 1-3, characterized in that, When the current key influencing factor is one of the four key influencing factors: ring blank thickness, mandrel feed speed, drive roll speed, and contact friction between the mandrel and the ring blank, the step of determining the optimal value from multiple values ​​corresponding to the current key influencing factor based on the uniformity of multiple strain distributions corresponding to the current key influencing factor includes: Obtain the third-degree mean value corresponding to the uniformity of multiple strain distributions under different values ​​of the current key influencing factors, and determine the minimum value among the multiple third-degree mean values; From the multiple values ​​corresponding to the current key influencing factors, determine the value corresponding to the minimum value, and use it as the optimal value corresponding to the current key influencing factor.

5. The method for rolling irregularly shaped rings based on strain field uniformity evaluation according to any one of claims 1-3, characterized in that, When the current key influencing factor is the ring billet heating temperature, the step of determining the optimal value from multiple values ​​corresponding to the current key influencing factor based on the uniformity of strain distribution corresponding to the current key influencing factor includes: A temperature constraint range is set, which is based on the criteria of suppressing Widmanstätten structure and avoiding surface over-oxidation behavior during the rolling process of the ring billet, and the upper limit of the temperature constraint range is lower than the β phase transformation point of the ring billet material. Within the temperature constraint range, the fourth degree mean value corresponding to the uniformity of multiple strain distributions at different values ​​of the ring billet heating temperature is obtained; From the values ​​covered by the temperature constraint range, the value with the smallest mean of the fourth degree and which meets the Widmanstätten structure inhibition requirement is selected as the optimal value corresponding to the ring billet heating temperature.

6. The method for rolling irregularly shaped rings based on strain field uniformity evaluation according to any one of claims 1-3, characterized in that, The process of simulating the rolling forming process of the ring billet using the multiple sets of rolling data to obtain the first irregular ring corresponding to each set of rolling data includes: Based on the aforementioned multiple sets of rolling data, a rectangular pre-rolling die is used to roll the ring billet into a ring with a rectangular cross-section. Using irregularly shaped rolls, the circular ring is initially adjusted and rolled into a third irregularly shaped blank. The contour similarity between the third irregularly shaped blank and the first irregularly shaped ring corresponding to the rolling data is greater than a preset similarity threshold. The third irregular blank is adjusted a second time using irregularly shaped rolls, and the third irregular blank is rolled into the first irregular ring corresponding to the rolling data.

7. The method for rolling irregularly shaped rings based on strain field uniformity evaluation according to any one of claims 1-3, characterized in that, The first irregular ring or the second irregular ring is a C-shaped cross-section irregular ring. The upper and lower parts of the C-shaped cross-section irregular ring are symmetrical along the center line. The upper or lower part includes a first diameter area, a second diameter area, and a transition area connecting the first diameter area and the second diameter area. The transition area has a tapered inclined surface.

8. A rolling system for irregularly shaped rings based on strain field uniformity evaluation, characterized in that, include: The data acquisition module is used to acquire multiple key influencing factors involved in the rolling and forming process of the ring billet; The data processing module is used to combine the multiple values ​​corresponding to each of the multiple key influencing factors to obtain multiple sets of rolling data, each set of rolling data including one value corresponding to each of the multiple key influencing factors; The rolling simulation module is used to simulate the rolling forming process of the ring billet using the multiple sets of rolling data, obtain the first irregular ring corresponding to each of the multiple sets of rolling data, and determine the strain field of the first irregular ring. The data processing module is also used to calculate the contribution rate of each of the multiple key influencing factors to the strain distribution of the irregular ring component based on the uniformity of strain distribution of each of the multiple strain fields; and to rank the multiple key influencing factors by importance based on the multiple contribution rates. The current key influencing factors are traversed in descending order of importance. Based on the uniformity of strain distribution corresponding to the current key influencing factors, the optimal value is determined from the multiple values ​​corresponding to the current key influencing factors. The optimal values ​​corresponding to each of the multiple key influencing factors are used as a set of optimal rolling data. The rolling simulation module is also used to simulate the rolling forming process of the ring billet using the optimal rolling data to obtain the second irregular ring.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the irregular ring rolling method based on strain field uniformity evaluation as described in any one of claims 1-7.

10. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the rolling method for irregularly shaped rings based on strain field uniformity evaluation as described in any one of claims 1-7.

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