A prediction method, system, storage medium and electronic device for a three-roll groove rolling process
By employing a method of geometric model spatial overlap calculation and width expansion compensation correction, the problems of insufficient calculation accuracy and time consumption in the three-roll rolling process were solved, and efficient and accurate prediction of rolling process parameters for multi-hole profiles and billet shapes was achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CISDI ENGINEERING CO LTD
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-14
AI Technical Summary
In the three-roll rolling process, existing technologies and traditional methods are not accurate enough and time-consuming, and cannot quickly adapt to the needs of different pass shapes and complex billet shapes. In particular, it is difficult to calculate arc triangle, circle and more complex tangential pass shapes.
The method employs spatial overlap calculation of geometric models and width compensation correction. By constructing the contour curve model of the inlet billet and the rolling pass, and combining it with piecewise functions, the rolling parameters are efficiently calculated analytically, supporting various pass topologies and billet shapes.
It improves the accuracy and efficiency of rolling process parameter prediction, can quickly simulate multi-pass rolling processes, output key process parameters, and support the process design of products with different specifications.
Smart Images
Figure CN122389239A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of metal plastic processing technology, and relates to a prediction method, system, storage medium and electronic equipment for three-roll mill rolling processes. Background Technology
[0002] In the field of metallurgical technology, especially in bar and wire rod rolling production, increasingly fierce market competition has placed higher demands on product dimensional accuracy, surface quality, and development cycles. Three-roll rolling technology, due to its ability to achieve uniform metal deformation, smaller rolling width expansion, and flexible online roll gap adjustment, is increasingly widely used in modern production lines. However, the rapid online changeover of product specifications poses a significant challenge to the accurate and efficient calculation of three-roll pass rolling process parameters.
[0003] Currently, traditional methods in this field mainly rely on empirical formulas or complex finite element simulations. Empirical formulas are usually based on numerous simplifying assumptions, resulting in insufficient computational accuracy and difficulty in predicting combinations of different roll pass shapes and complex billet shapes. While finite element simulations offer higher accuracy, the modeling and calculation processes are exceptionally time-consuming, failing to meet the needs of rapid iteration and optimization of multi-pass procedures during the process design phase. Existing technologies include some calculation methods for specific roll pass shapes, such as a method for calculating the cross-sectional area of three-roll roll bar stock, but these are mainly limited to flat triangular roll pass shapes and cannot meet the calculation requirements of arc triangular roll pass shapes, circular roll pass shapes, and even more complex tangential roll pass shapes commonly used in modern production lines. Therefore, there is an urgent need for a three-roll roll pass prediction method that can balance high accuracy and high efficiency while possessing broad adaptability. Summary of the Invention
[0004] In view of this, the object of the present invention is to provide a prediction method, system, storage medium and electronic device for three-roll pass rolling processes.
[0005] To achieve the above objectives, the present invention provides the following technical solution: A prediction method for three-roll pass rolling processes includes the following steps: Obtain the cross-sectional profile data of the inlet billet and the cross-sectional profile data of the rolling pass for the current pass; Based on the cross-sectional profile data of the inlet billet, a first profile curve model is constructed; Based on the cross-sectional profile data of the rolling pass, a second profile curve model is constructed; The first profile curve model and the second profile curve model are spatially overlapped in the rolling coordinate system, and the profile line segment closest to the rolling center line is extracted to generate the initial rolling exit profile curve model. The width expansion is calculated based on the reduction of the current pass, and the initial rolling exit profile curve model is expanded and corrected outward based on the width expansion to obtain the target rolling exit profile curve model for that pass. The target rolling exit profile curve model is used as the inlet billet cross-sectional profile data for the next pass. The above steps are executed iteratively until the calculation of all preset passes is completed. Based on the target rolling exit profile curve model of the final and intermediate passes, the corresponding rolling process parameters are calculated and output.
[0006] Furthermore, both the first profile curve model and the second profile curve model are constructed using the rolling center line as the origin and through piecewise functions, which include equations for straight line segments and equations for circular arc segments.
[0007] Furthermore, the step of performing spatial overlap calculations between the first profile curve model and the second profile curve model in the rolling coordinate system specifically includes: The first contour curve model and the second contour curve model are superimposed in a polar coordinate system or a Cartesian coordinate system; For each angular direction, compare the radial length values of the first contour curve model and the second contour curve model; The smaller value among the radial length values is selected as the rolled radial length in that angular direction; Connect the points corresponding to the radial length after rolling in all angular directions in sequence to form the initial rolling exit profile curve model.
[0008] Furthermore, the step of calculating the width extension based on the reduction amount of the current pass includes: Based on the initial contour area and overlapping area Calculate the reduction amount Q The amount of pressure mentioned Q The calculation formula is: ; Based on the aforementioned reduction amount The overlap coefficient is calculated using a preset linear or nonlinear function. a ; Calculate the width area The wide area The calculation formula is: ; According to the aforementioned wide area Based on the current pass's roll gap geometry, the required increase in displacement in the roll gap direction is calculated, which is used as the width expansion. .
[0009] Furthermore, the geometric topology of the rolling pass corresponding to the cross-sectional profile data includes flat triangular pass, arc triangular pass, circular pass, and tangential pass.
[0010] Furthermore, the billet shape corresponding to the inlet billet cross-sectional profile data is a cross-sectional shape with 120° rotational symmetry, and can coincide with itself after rotating 120° around the rolling centerline.
[0011] A prediction system for three-roll pass rolling process is provided to implement the prediction method. The system includes a data interface module, a geometric modeling module, a rolling simulation module, a width correction module, a process calculation module, and an output display module. The data interface module is used to obtain the initial parameters of the rolled piece and the initial parameters of the roll pass. The geometric modeling module is connected to the data interface module and is used to construct the first contour curve model of the inlet billet and the second contour curve model of the rolling pass according to the initial parameters of the rolled piece and the initial parameters of the roll pass, respectively. The rolling simulation module is connected to the geometric modeling module and is used to perform the spatial overlap calculation between the first profile curve model and the second profile curve model to generate the initial rolling exit profile curve model. The width expansion correction module is connected to the rolling simulation module and is used to calculate the width expansion based on the pass reduction and to perform width expansion compensation correction on the initial rolling exit profile curve model to obtain the target rolling exit profile curve model. The process calculation module is connected to the width correction module and is used to analytically calculate process parameters including elongation coefficient, contact area and rolling torque based on the corrected target rolling exit profile curve model. The output display module is connected to the process calculation module and is used to display the target rolling exit profile curve model and the process parameters in a graphical manner, or to output a data file containing the target rolling exit profile curve model and the process parameters.
[0012] Furthermore, the initial parameters of the rolled piece obtained by the data interface module include the inlet diameter, inlet speed, inlet temperature and steel type, and the initial parameters of the pass include the pass radius, expansion angle, inscribed circle diameter, roll diameter, rolling pass number and pass shape identifier.
[0013] A computer-readable storage medium having a computer program stored thereon, the computer program being executed by a processor of the prediction method described herein.
[0014] An electronic device, comprising: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the prediction method according to any one of claims 1 to 6.
[0015] The beneficial effects of this invention are as follows: (1) The present invention combines geometric model spatial overlap calculation with width compensation correction, which is closer to the physical essence of metal rolling in theory. It simulates the compression deformation of the billet by the roll and reasonably considers the lateral flow of the metal, thereby significantly improving the prediction accuracy of rolling process parameters and post-rolling profile shape.
[0016] (2) This method has strong adaptability. Its contour curve model can support various hole topologies such as flat triangular hole type, arc triangular hole type, circular hole type and tangent hole type, and can handle symmetrical blank shapes such as round and hexagonal. It overcomes the problem that the existing technology is limited to a single hole type and can flexibly meet the process design requirements of different specifications of products.
[0017] (3) Compared with the time-consuming finite element simulation, the present invention adopts an analytical calculation method based on geometric model, which eliminates the complex physical field iterative solution process and realizes rapid simulation and iterative optimization of multi-pass rolling process, which greatly improves the efficiency of process design.
[0018] (4) The output information of this method is comprehensive. It can not only predict the profile of the billet after each rolling pass, but also automatically analyze and calculate a series of key rolling process parameters, including elongation coefficient, contact area, rolling torque, motor power, etc., providing complete data support for formulating reasonable rolling procedures and verifying equipment capabilities.
[0019] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description
[0020] To make the objectives, technical solutions, and advantages of the present invention clearer, the preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, wherein: Figure 1 This is a flowchart of the three-roll pass rolling process prediction method in an embodiment of the present invention; Figure 2 This is a schematic diagram showing the evolution of the cross-sectional profile of the three-roll pass rolling mill in Example 1; Figure 3This is a schematic diagram showing the evolution of the cross-sectional profile of the three-roll pass rolling mill in Example 2; Figure 4 This is a schematic diagram showing the evolution of the cross-sectional profile of the three-roll pass rolling mill in Example 3; Figure 5 This is a schematic diagram showing the evolution of the cross-sectional profile of the three-roll pass rolling mill in Example 4; Figure 6 This is a schematic diagram showing the evolution of the profile of the three-roll pass rolling cross section in Example 5. Detailed Implementation
[0021] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0022] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the invention. To better illustrate the embodiments of the invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0023] In the accompanying drawings of the embodiments of the present invention, the same or similar reference numerals correspond to the same or similar components. In the description of the present invention, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting the present invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0024] Figure 1 A flowchart illustrating the overall process flow of a prediction method for a three-roll pass rolling process according to an embodiment of the present invention is shown. Figure 1As shown, the method begins in S101, acquiring the inlet billet cross-sectional profile data and rolling pass cross-sectional profile data for the current pass. Next, in S102, a first profile curve model is constructed based on the inlet billet data. In S103, a second profile curve model is constructed based on the rolling pass data. Subsequently, in S104, the first and second profile curve models are spatially overlapped in the rolling coordinate system, and the profile segment closest to the rolling centerline is extracted to generate an initial rolling exit profile curve model. Then, in S105, the corresponding width expansion is calculated based on the reduction amount of the current pass, and the initial model is expanded outwards based on this width expansion to obtain the final target rolling exit profile curve model for that pass. In S106, a judgment is made: if all preset passes have been calculated, proceed to S108; otherwise, proceed to S107, using the target model obtained in this pass as the inlet billet cross-sectional profile data for the next pass, and return to S101 to begin the iterative calculation for the next pass. Finally, in S108, based on the target rolling exit profile curve model for all passes, the corresponding rolling process parameters are calculated and output. Furthermore, the various profile models and process parameters generated during the process can be displayed graphically or saved as data files in S109. The following detailed descriptions of the above process and its key technical solutions are provided through several specific embodiments.
[0025] Example 1: Single-pass rolling of round billets in a flat triangular die Figure 2 This diagram illustrates the evolution of the cross-sectional profile of a round billet from the inlet to the outlet during rolling in a flat triangular die.
[0026] A specific implementation process is as follows: Taking a three-roll sizing mill unit in a steel plant as an example, for the diameter D A 50 mm round billet is rolled in a single pass. Specific input parameters are: billet material is 45# steel, inlet temperature is 950℃, inlet velocity is 1.5 m / s, and inlet diameter is... D 0 = 50mm. The hole shape adopts a flat triangular shape, and its hole radius is... R =0mm, expansion angle θ =0°, diameter of the inscribed circle of the hole D =40mm, roll diameter Dr =380mm, rolling passes n =1.
[0027] S1, Construct the first profile curve model of the inlet billet. Using the rolling centerline as the origin, represent the circular billet profile using polar coordinates as follows: ρ ( =25mm, where ∈[0,2 π ).
[0028] S2, Construct the second contour curve model of the rolling pass. The flat triangular pass is composed of three identical straight line segments. Construct a straight line segment 20mm from the origin and at a 30° angle to the Y-axis. The other two segments are obtained by rotating this straight line segment around the origin by 120° and 240° respectively.
[0029] S3, perform spatial overlap calculation to generate the initial contour. Superimpose the two contour models in polar coordinates. For each angular direction... Calculate the radial length of the billet respectively. ( =25mm and the radial length of the hole ( The smaller of the two values is taken as the rolled radial length in that direction. ( Connecting all directions. ( The points corresponding to these points form the initial rolling exit profile curve model.
[0030] S4, perform width calculation and correction. Calculate the area of the initial circular blank S1 = π 25²≈1962.5mm². Calculate the overlapping area. =1656.9mm². Calculate the reduction. Based on this reduction amount, the overlap coefficient is calculated using a preset function. a =95.1%. Next, calculate the expansion area. = ≈85.4mm². Based on the geometric characteristics of the roll gap in the current pass, the displacement required to distribute the excess area in the roll gap direction, i.e., the width expansion, is calculated. =1.5mm. Finally, the initial profile obtained in S3 is uniformly extended outward in the angle region corresponding to the roll gap. The final target rolling exit profile curve model is obtained, such as... Figure 2 As shown.
[0031] S5, This embodiment is a single pass, without iteration.
[0032] S6 calculates and outputs process parameters. Based on the final target profile, calculates the elongation factor. =1.13, contact arc length L =30.8mm, contact area A =3208.5mm². The rolling torque can then be calculated. M =1.58 Motor power P =136.7kW.
[0033] Example 2: Multi-pass continuous rolling of complex cross-section billets in an arc-triangular die Figure 3 This diagram illustrates the evolution of the profile when the target exit profile obtained in Example 1 is used as the entry point for this pass and a second pass is rolled in an arc-triangular die.
[0034] A specific implementation process is as follows: In this embodiment, the target exit profile (with an area S1 of approximately 1741.8 mm²) calculated in Example 1 is used as the inlet blank for this pass (i.e., the second pass). An arc-triangular die is used, with the following specific parameters: die radius... R =35mm, expansion angle θ =73°, diameter of the inscribed circle of the hole D =44mm, roll diameter Dr =380mm, rolling passes n =2.
[0035] S1, Construct the inlet profile curve model. With the rolling centerline as the origin, construct the profile curve model of the outlet billet cross section of Example 1 as the first profile curve model for this pass.
[0036] S2, Construct the profile curve model of the die. The arc-triangular die is composed of three identical arc segments. Construct an arc with a radius of 35mm and an expansion angle (central angle) of 73°. The three identical arc segments are distributed around the rolling center line at 120° intervals, forming an inscribed circle with a diameter of 44mm.
[0037] S3, Perform spatial overlap calculation to generate the initial profile. Superimpose the two profiles in Cartesian coordinates, calculate the geometric overlap, and extract the profile segment closest to the centerline to obtain the initial rolling exit profile.
[0038] S4, perform width calculation and correction. Calculate the initial outline area S1 = 1741.8 mm². Calculate the overlap area. =1479.5mm². Calculate the reduction. Q =15.1%. The overlap factor is calculated based on the reduction amount. a =95.4%. Calculate the expansion area. = ≈71.3mm². The width expansion was calculated based on the roll gap geometry. =1.1mm. Expand the initial profile outwards in the corresponding angle region of the roll gap. The final target rolling exit profile curve model for this pass is obtained, as follows: Figure 3 As shown.
[0039] S5, Iteration. This embodiment is the second iteration of Embodiment 1. The target model obtained in this iteration can be used as data for subsequent iterations.
[0040] S6, calculate and output process parameters. The elongation coefficient is calculated based on the target profile. λ =1.12, contact arc length L =27.6mm, contact area A =1714.0mm², rolling torque M =0.76 Motor power P =71.3kW.
[0041] Example 3: Multi-pass continuous rolling of complex cross-section billets in a circular die Figure 4 A schematic diagram showing the profile evolution of the target exit profile obtained in Example 1 during rolling in a circular die is presented.
[0042] A specific implementation process is as follows: In this embodiment, the target outlet profile (area S1 = 1741.8 mm²) obtained in Example 1 is also used as the inlet blank. A circular hole shape is adopted, with the following specific parameters: hole radius... R =22mm, expansion angle θ =120°, diameter of the inscribed circle of the hole D =46mm, roll diameter Dr =380mm, rolling passes n =2.
[0043] S1, Construct the inlet contour curve model. Same as S1 in Example 2.
[0044] S2, Construct the profile curve model of the die. The circular die is composed of three identical arc segments. Construct an arc with a radius of 22mm and an expansion angle of 120°. The three identical arc segments are distributed around the rolling center line at 120° intervals, forming an inscribed circle with a diameter of 46mm.
[0045] S3, perform spatial overlap calculation to generate the initial profile. Superimpose the two model profiles in the Cartesian coordinate system, and obtain the initial rolling exit profile through geometric calculation.
[0046] S4, perform width calculation and correction. Calculate the initial outline area S1 = 1741.8 mm². Calculate the overlap area. =1520.1mm². Calculate the reduction. Q =12.7%. The overlap factor is calculated based on the reduction amount. a =97.9%. Calculate the expansion area. = ≈97.8mm². The calculated width expansion is... =1.8mm. Extend the initial profile outwards in the roll gap area. The target exit profile is obtained, such as... Figure 4 As shown.
[0047] S5, Iteration. This embodiment serves as another optional pass following Embodiment 1.
[0048] S6, calculate and output process parameters. The elongation coefficient is calculated based on the target profile. λ =1.08, contact arc length L =24.6mm, contact area A =1092.2mm², rolling torque M =0.43 Motor power P =39.8kW.
[0049] Example 4: Single-pass rolling of hexagonal billets in a flat triangular die Figure 5 A schematic diagram showing the outline of a hexagonal billet after rolling in a flat triangular die is displayed.
[0050] A specific implementation process is as follows: With side length a A hexagonal billet with a diameter of 28mm is rolled in a single pass. Billet parameters: material is 45# steel, inlet temperature is 950℃, inlet speed is 1.5m / s. Pass parameters: flat triangular pass radius. R =0mm, expansion angle θ =0°, diameter of the inscribed circle of the hole D =40mm, roll diameter Dr =380mm, rolling passes n =1.
[0051] S1. Construct the inlet profile curve model. Using the rolling centerline as the origin, construct the profile curve model of a regular hexagonal billet, which has 120° rotational symmetry.
[0052] S2, construct the hole profile curve model. Same as S2 in Example 1, construct the flat triangular hole model.
[0053] S3, perform spatial overlap calculation to generate the initial profile. Superimpose the hexagonal billet model and the flat triangular hole model in the Cartesian coordinate system, and calculate the geometric overlap to obtain the initial exit profile.
[0054] S4, perform width calculation and correction. Calculate the initial hexagonal blank area S1 = 2036.9 mm². Calculate the overlap area. =1648.7mm². Calculate the reduction. Q=19.1%. The overlap factor is calculated based on the reduction amount. a =93.1%. Calculation breadth = ≈122.2mm². The calculated width expansion is... =2.28mm. Extend the initial profile outwards in the roll gap area. The target exit profile is obtained, such as... Figure 5 As shown.
[0055] S5, This embodiment is a single pass, without iteration.
[0056] S6, calculate and output process parameters. The elongation coefficient is calculated based on the target profile. λ =1.15, contact arc length L =26.8mm, contact area A =3066.5mm², rolling torque M =1.32 Motor power P =123.4kW.
[0057] Example 5: Single-pass rolling of round billets in a tangential die Figure 6 A schematic diagram showing the outline of a round billet after rolling in a tangential die is displayed.
[0058] A specific implementation process is as follows: For diameter D A circular billet with a diameter of 50 mm is rolled in a single pass. The billet parameters are the same as in Example 1. A tangential pass is used, with the following specific parameters: pass radius... R =25mm, expansion angle θ =20°, diameter of the inscribed circle of the hole D =42mm, roll diameter Dr =380mm, rolling passes n =1.
[0059] S1, construct the entrance contour curve model. Same as S1 in Example 1, construct the circular billet model.
[0060] S2, Construct the second contour curve model of the tangent die. The tangent die is composed of three identical straight line segments and circular arc segments. The specific construction method is as follows: Using the rolling center line as the origin, construct a circular arc segment with a radius of 25mm, starting at a specific position (e.g., at an angle of 30° to the Y-axis), with a corresponding expansion angle (central angle) of 10° (i.e.,...). θ / 2). Draw a tangent to the arc from the end point of the arc segment and extend the straight line segment. Rotate this combined contour line of "arc segment + straight line segment" around the origin by 120° and 240° respectively to obtain a complete closed tangent hole contour.
[0061] S3, Perform spatial overlap calculation to generate the initial profile. Superimpose the circular billet model and the tangent hole model in the Cartesian coordinate system, and calculate the geometric overlap to obtain the initial exit profile.
[0062] S4. Perform width calculation and correction. Calculate the initial circular billet area S1 = 1962.5 mm². Calculate the overlap area S_overlap = 1651.7 mm². Calculate the reduction Q = 15.8%. Calculate the overlap coefficient based on the reduction. a =95.0%. Calculate the expansion area. = ≈86.9mm². The calculated width expansion is... =2.3mm. Extend the initial profile outwards in the roll gap area. The target exit profile is obtained, such as... Figure 6 As shown.
[0063] S5, This embodiment is a single pass, without iteration.
[0064] S6, calculate and output process parameters. The elongation coefficient is calculated based on the target profile. λ =1.13, contact arc length L =26.2mm, contact area A =3301.2mm², rolling torque M =1.39 Motor power P =128.9kW.
[0065] Example 6: System Example A prediction system for implementing the above method includes a data interface module, a geometric modeling module, a rolling simulation module, a width correction module, a process calculation module, and an output display module connected in sequence.
[0066] The data interface module is used to obtain the initial parameters of the rolled piece (such as inlet diameter, speed, temperature, and steel grade) and the initial parameters of the roll pass (such as roll radius, expansion angle, inscribed circle diameter, roll diameter, pass number, and shape identifier) as described in the above embodiments.
[0067] Based on these parameters, the geometric modeling module constructs contour curve models of various inlet billets and rolling pass types as described in Examples 1 to 5.
[0068] The rolling simulation module executes the spatial overlap calculation algorithm as described in S3 of Example 1 and S3 of Examples 2 to 5 to generate the initial rolling exit profile.
[0069] The width correction module executes the width calculation and correction logic as described in S4 of each embodiment to obtain the target exit profile.
[0070] Based on the final profile, the process calculation module calculates and outputs a series of process parameters, such as elongation coefficient, reduction amount, contact arc length, contact area, rolling torque, and motor power, as described in S6 of each embodiment.
[0071] The output display module is used to display, in a graphical manner, such as Figures 2 to 6 The diagram shows the contour evolution and outputs a list of process parameters or a data file.
[0072] This invention, through the aforementioned specific embodiments, elaborates in detail on a method, system, and application for predicting three-roll pass rolling processes based on geometric overlap and width compensation. These embodiments cover different billets such as round and hexagonal, as well as combinations of various pass types including flat triangle, arc triangle, round, and tangent, and provide specific calculation parameters and procedures. They fully support the technical solutions claimed in the claims, demonstrating the wide applicability, high precision, and high efficiency of this invention.
[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.
Claims
1. A prediction method for three-roll pass rolling processes, characterized in that: Includes the following steps: Obtain the cross-sectional profile data of the inlet billet and the cross-sectional profile data of the rolling pass for the current pass; Based on the cross-sectional profile data of the inlet billet, a first profile curve model is constructed; Based on the cross-sectional profile data of the rolling pass, a second profile curve model is constructed; The first profile curve model and the second profile curve model are spatially overlapped in the rolling coordinate system, and the profile line segment closest to the rolling center line is extracted to generate the initial rolling exit profile curve model. The width expansion is calculated based on the reduction of the current pass, and the initial rolling exit profile curve model is expanded and corrected outward based on the width expansion to obtain the target rolling exit profile curve model for that pass. The target rolling exit profile curve model is used as the inlet billet cross-sectional profile data for the next pass. The above steps are executed iteratively until the calculation of all preset passes is completed. Based on the target rolling exit profile curve model of the final and intermediate passes, the corresponding rolling process parameters are calculated and output.
2. The prediction method for three-roll pass rolling process according to claim 1, characterized in that: Both the first profile curve model and the second profile curve model are constructed using the rolling center line as the origin and piecewise functions, which include equations for straight line segments and equations for circular arc segments.
3. The prediction method for three-roll pass rolling process according to claim 1, characterized in that: The step of performing spatial overlap calculations between the first profile curve model and the second profile curve model in the rolling coordinate system specifically includes: The first contour curve model and the second contour curve model are superimposed in a polar coordinate system or a Cartesian coordinate system; For each angular direction, compare the radial length values of the first contour curve model and the second contour curve model; The smaller value among the radial length values is selected as the rolled radial length in that angular direction; Connect the points corresponding to the radial length after rolling in all angular directions in sequence to form the initial rolling exit profile curve model.
4. The prediction method for three-roll pass rolling process according to claim 1, characterized in that: The step of calculating the width expansion based on the current pass reduction includes: Based on the initial contour area and overlapping area Calculate the reduction amount Q The amount of pressure mentioned Q The calculation formula is: ; Based on the aforementioned reduction amount The overlap coefficient is calculated using a preset linear or nonlinear function. a ; Calculate the width area The wide area The calculation formula is: ; According to the aforementioned wide area Based on the current pass's roll gap geometry, the required increase in displacement in the roll gap direction is calculated, which is used as the width expansion. .
5. The prediction method for three-roll pass rolling process according to claim 1 or 2, characterized in that: The cross-sectional profile data of the rolling pass corresponds to the geometric topology of the pass, including flat triangular pass, arc triangular pass, circular pass, and tangential pass.
6. The prediction method for three-roll pass rolling process according to claim 1 or 2, characterized in that: The billet shape corresponding to the inlet billet cross-sectional profile data is a cross-sectional shape with 120° rotational symmetry, and can coincide with itself after rotating 120° around the rolling centerline.
7. A prediction system for three-roll pass rolling processes, characterized in that: The system for implementing the prediction method according to any one of claims 1 to 6 includes a data interface module, a geometric modeling module, a rolling simulation module, a width correction module, a process calculation module, and an output display module; The data interface module is used to obtain the initial parameters of the rolled piece and the initial parameters of the roll pass. The geometric modeling module is connected to the data interface module and is used to construct the first contour curve model of the inlet billet and the second contour curve model of the rolling pass according to the initial parameters of the rolled piece and the initial parameters of the roll pass, respectively. The rolling simulation module is connected to the geometric modeling module and is used to perform the spatial overlap calculation between the first profile curve model and the second profile curve model to generate the initial rolling exit profile curve model. The width expansion correction module is connected to the rolling simulation module and is used to calculate the width expansion based on the pass reduction and to perform width expansion compensation correction on the initial rolling exit profile curve model to obtain the target rolling exit profile curve model. The process calculation module is connected to the width correction module and is used to analytically calculate process parameters including elongation coefficient, contact area and rolling torque based on the corrected target rolling exit profile curve model. The output display module is connected to the process calculation module and is used to display the target rolling exit profile curve model and the process parameters in a graphical manner, or to output a data file containing the target rolling exit profile curve model and the process parameters.
8. The prediction system for three-roll pass rolling process according to claim 7, characterized in that: The initial parameters of the rolled piece obtained by the data interface module include the inlet diameter, inlet speed, inlet temperature and steel type. The initial parameters of the pass include the pass radius, expansion angle, inscribed circle diameter, roll diameter, rolling pass number and pass shape identifier.
9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the prediction method according to any one of claims 1 to 6.
10. An electronic device, characterized in that: include: One or more processors; Storage device for storing one or more programs; When the one or more programs are executed by the one or more processors, the one or more processors implement the prediction method according to any one of claims 1 to 6.