CN118268386A - Rolling force determination method and device for dynamic rolling of rolled piece from thin to thick - Google Patents

Abstract

The invention discloses a method and a device for determining rolling force of rolling piece from thin to thick, which relate to the technical field of rolling, and the method for determining rolling force of rolling piece from thin to thick comprises the following steps: determining the inclination angle of a dynamic rolling deformation zone according to the half thickness of a rolled piece and the length of the dynamic rolling deformation zone; determining the outlet half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of a roller in the dynamic rolling process; determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece; and determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force. The method can accurately determine the rolling force in the dynamic rolling process of the rolled piece from thin to thick, and is beneficial to improving the yield of the rolled piece.

Description

Rolling force determination method and device for dynamic rolling of rolled piece from thin to thick

Technical Field

The invention relates to the technical field of rolling, in particular to a method and a device for determining rolling force of dynamic rolling of a rolled piece from thin to thick.

Background

The short-process endless continuous casting and rolling technology ESP (ENDLESS STRIP production) is another leap of steel production technology, and unlike the traditional hot continuous rolling technology, the ESP directly enters a roughing mill to be rolled into a medium plate through a liquid core under the condition that a casting blank is pressed into a thin strip steel through a liquid core, and the thin strip steel is rolled into a coil through a finishing mill after being heated in an induction way. The ESP technology integrates the preparation and forming processes of the product, the production line is arranged tightly, procedures such as ingot sawing, face milling, heating and the like are not needed, and the ESP technology has the advantages of short technological process, less equipment, small occupied area and low investment cost, is easy to realize the automation and scientific management of the production and processing process, and plays an important role in rolling production.

The ESP production line adopts a headless continuous casting and rolling process and a compact flow production, has excellent process cost advantages, the whole production line is connected by a steel belt, no threading and tail flicking are caused in the endless rolling process, the whole length temperature of the steel belt is uniform, the rolling process is stable, the thickness and the width of a steel coil can be ensured, the geometric loss and the process waste of a product produced by the ESP technology are less, the yield is high, the high-strength thin-specification hot rolled product can be stably and highly accurately produced in batches, and the production cost is 30 percent lower than that of the traditional tropical steel production process~50。

However, in the production process of an ESP production line, a dynamic rolling thickness control method from thin to thick is generally adopted to reduce the cutting of a dovetail of a product and improve the yield, but the thickness of the product needs to be precisely controlled, and the rolling force needs to be accurately controlled in the production process. Therefore, how to accurately determine the rolling force during the dynamic rolling process of the rolled piece from thin to thick so as to improve the yield of the rolled piece is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

The invention aims to provide a rolling force determining method and a rolling force determining device for dynamic rolling of a rolled piece from thin to thick, so that the rolling force is accurately determined in the dynamic rolling process of the rolled piece from thin to thick, and the rolling yield of the rolled piece is improved.

In order to achieve the above object, the present invention provides the following technical solutions:

A rolling force determination method for dynamic rolling of a rolled piece from thin to thick, comprising:

Determining the inclination angle of a dynamic rolling deformation zone according to the half thickness of a rolled piece and the length of the dynamic rolling deformation zone;

Determining the outlet half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of a roller in the dynamic rolling process;

Determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece;

And determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force.

In an alternative embodiment of the present application, further comprising:

And carrying out iterative optimization calculation on the first rolling force through convergence conditions between the roller radius and the rolling force, and determining a second rolling force in the dynamic rolling process of the rolled piece from thin to thick.

In an alternative embodiment of the present application, the determining the inclination angle of the dynamic rolling deformation zone according to the half thickness of the rolled piece and the length of the dynamic rolling deformation zone includes:

Determining the thickness of the thick region half of the rolled piece, the thickness of the thin region half of the rolled piece and the length of the dynamic rolling deformation region based on short-flow headless continuous casting and rolling process specification data;

And determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick zone half of the rolled piece, the thickness of the thin zone half of the rolled piece and the length of the dynamic rolling deformation zone.

In an alternative embodiment of the present application, the determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick half of the rolled piece, the thickness of the thin half of the rolled piece, and the length of the dynamic rolling deformation zone is achieved by the following formula:

；

Wherein, An inclination angle of the dynamic rolling deformation zone; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; l is the length of the dynamic rolling deformation zone.

In an alternative embodiment of the present application, the determining the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone during the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of the roller during the dynamic rolling process is implemented by the following formula:

；

；

Wherein, Representing a dynamic rolling time of the rolled piece; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; the upward moving speed of the roller is set; t represents any time in the dynamic rolling process; The thickness of the rolling piece is half of the thickness of the rolling piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process.

In an alternative embodiment of the present application, further comprising:

Determining deformation resistance of the rolled piece in an annealing state, rotating speed of a roller and half thickness of an inlet of the rolled piece in the dynamic rolling deformation area in a dynamic rolling process;

And determining the deformation resistance of the rolled piece according to the deformation resistance of the rolled piece in an annealing state, the rotating speed of the roller, the inlet half thickness and the outlet half thickness.

In an alternative embodiment of the application, the determination of the deformation resistance of the rolled stock according to the deformation resistance in the annealed state of the rolled stock, the roll speed, the inlet half-thickness and the outlet half-thickness is carried out by the following formula:

；

Wherein, Is the deformation resistance of the rolled piece; Resistance to deformation in the annealed condition of the product; The rotating speed of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r represents the flattening radius of the roller; 、、、、、、 Is a preset material coefficient related to deformation conditions.

In an alternative embodiment of the present application, the determining the first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relationship between the minimum value of the total power pan function and the rolling force includes:

the first rolling force is determined by the following formula:

；

Wherein, Is the first rolling force; Is the roll linear speed; Is the original radius of the roller; As a function of the total power spread; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; Is the moment arm coefficient.

In an optional embodiment of the present application, the iterative optimization calculation is performed on the first rolling force according to the convergence condition between the radius of the roll and the rolling force, and the determining the second rolling force in the dynamic rolling process from thin to back of the rolled piece includes:

The convergence condition includes:

；

Wherein, Roll radius for the nth iteration; roll radius for the n-1 th iteration;

the iterative optimization calculation is realized by the following formula:

Wherein, Is the original radius of the roller; is the first rolling force; is the elastic modulus of the roller; d is the half width of the roller; r is the flattening radius of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; And in the dynamic rolling process, the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone is half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone.

Compared with the prior art, the method for determining the rolling force of the dynamic rolling of the rolled piece from thin to thick can determine the minimum value of the total power universal function at any moment in the dynamic rolling process through the inclination angle of the dynamic rolling deformation area, the half thickness of the outlet and the deformation resistance of the rolled piece; and determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force. The method can accurately determine the rolling force in the dynamic rolling process of the rolled piece from thin to thick, and is beneficial to improving the yield of the rolled piece.

In a second aspect, the present invention also provides a rolling force determining apparatus for dynamic rolling of a rolled piece from thin to thick, comprising:

The first unit is used for determining the inclination angle of the dynamic rolling deformation zone according to the half thickness of the rolled piece and the length of the dynamic rolling deformation zone;

The second unit is used for determining the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of the roller in the dynamic rolling process;

The third unit is used for determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece;

And a fourth unit for determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force.

Compared with the prior art, the beneficial effects of the device provided by the invention are the same as those of the rolling force determining method for dynamic rolling of the rolled piece from thin to thick in the technical scheme, and the description is omitted here.

In a third aspect, the present invention also provides an electronic device, including:

A processor;

a memory for storing the processor-executable instructions;

The processor is used for executing the rolling force determining method of dynamic rolling of the rolled piece from thin to thick by running the instructions in the memory.

Compared with the prior art, the beneficial effects of the electronic equipment provided by the invention are the same as those of the rolling force determining method for dynamic rolling of the rolled piece from thin to thick in the technical scheme, and the description is omitted here.

In a fourth aspect, the present invention also provides a computer storage medium having instructions stored therein that, when executed, implement the rolling force determination method for thin-to-thick dynamic rolling of a rolled piece as described above.

Compared with the prior art, the beneficial effects of the computer storage medium provided by the invention are the same as those of the rolling force determining method for dynamic rolling of the rolled piece from thin to thick in the technical scheme, and the description is omitted here.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:

FIG. 1 is a flow chart of a method for determining rolling force for dynamic rolling of a rolled piece from thin to thick according to an embodiment of the present application;

FIG. 2 is a schematic view of dynamic rolling of a rolling stock from thin to thick according to an embodiment of the present application;

FIG. 3 is a schematic diagram of parameter distribution according to an embodiment of the present application;

FIG. 4 is a graph showing the variation of rolling force with time according to an embodiment of the present application;

FIG. 5 is a block diagram of a rolling force determining apparatus for dynamic rolling of a rolled piece from thin to thick according to an embodiment of the present application;

fig. 6 is a schematic structural diagram of an electronic device according to an embodiment of the present application.

Detailed Description

In order to clearly describe the technical solution of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. For example, the first threshold and the second threshold are merely for distinguishing between different thresholds, and are not limited in order. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

In the present invention, the words "exemplary" or "such as" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "for example" should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "exemplary" or "such as" is intended to present related concepts in a concrete fashion.

In the present invention, "at least one" means one or more, and "a plurality" means two or more. "and/or", describes an association relationship of an association object, and indicates that there may be three relationships, for example, a and/or B, and may indicate: a alone, a and B together, and B alone, wherein a, B may be singular or plural. The character "/" generally indicates that the context-dependent object is an "or" relationship. "at least one of" or the like means any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (one) of a, b or c may represent: a, b, c, a and b, a and c, b and c, or a, b and c, wherein a, b, c can be single or multiple.

First part, method embodiment

The embodiment of the application firstly provides a rolling force determining method for dynamic rolling of a rolled piece from thin to thick, referring to fig. 1, fig. 1 is a flow chart of the rolling force determining method for dynamic rolling of the rolled piece from thin to thick.

As shown in fig. 1, the rolling force determining method of the dynamic rolling of the rolled piece from thin to thick includes the following S101 to S104:

s101, determining the inclination angle of the dynamic rolling deformation zone according to the half thickness of the rolled piece and the length of the dynamic rolling deformation zone.

In an embodiment of the present application, the half thickness of the rolled piece includes: the thickness of the thick area of the rolled piece is half-thick, and the thickness of the thin area of the rolled piece is half-thick.

The half thickness of the rolled piece, the length of the dynamic rolling deformation zone and other rolled piece data can be determined by short-flow headless continuous casting and rolling pass technical specification data.

In order to facilitate an understanding of the thin-to-thick dynamic rolling process of a rolled stock provided by embodiments of the present application, the process and the rolled stock are described below in connection with FIG. 2.

Referring to fig. 2, fig. 2 is a schematic diagram of dynamic rolling of a rolled piece from thin to thick according to an embodiment of the present application.

As shown in fig. 2, fig. 2 includes a rolled piece, which includes: a thin region, a thin-to-thick dynamic process deformation region and a thick region;

The width of the rolled piece is 200mm, the thickness of the thick area of the rolled piece is 14mm, the length of the thick area is 50mm, the thickness of the thin area of the rolled piece is 8mm, the length of the thin area is 50mm, the length of the deformation area in the dynamic process from thin to thick is 200mm, and the thickness of the rolled piece is gradually increased along with the dynamic rolling.

Specifically, S101 includes: and determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick zone half of the rolled piece, the thickness of the thin zone half of the rolled piece and the length of the dynamic rolling deformation zone.

Specifically, the inclination angle of the dynamic rolling deformation region mentioned in S101 above may be determined by the following formula (1):

（1）；

Wherein, An inclination angle of the dynamic rolling deformation zone; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; l is the length of the dynamic rolling deformation zone.

S102, determining the outlet half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of a roller in the dynamic rolling process.

Specifically, the outlet half thickness of the dynamic rolling deformation zone outlet described in S102 above may be determined by the following formulas (2) and (3):

（2）；

（3）；

Wherein, Representing a dynamic rolling time of the rolled piece; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; the upward moving speed of the roller is set; t represents any time in the dynamic rolling process; The thickness of the rolling piece is half of the thickness of the rolling piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process.

S103, determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece.

In the embodiment of the present application, S103 includes the following S1 to S4:

s1, determining internal deformation power and friction power of the rolled piece according to deformation resistance of the rolled piece, inclination angle of the dynamic rolling deformation zone and the half thickness of the outlet;

S2, determining the distance of the outlet position of the dynamic rolling deformation zone from the continuous line of the roller and the distance of the inlet position of the dynamic rolling deformation zone from the continuous line of the roller;

S3, determining the shearing power of the rolled piece according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet, the distance of the outlet position of the dynamic rolling deformation zone from the continuous line of the roller and the distance of the inlet position of the dynamic rolling deformation zone from the continuous line of the roller;

And S4, determining the total power universal function minimum value at any moment in the dynamic rolling process according to the internal deformation power, friction power and shearing power of the rolled piece.

Specifically, the internal deformation power mentioned in S1 above can be determined by the following formula (4):

（4）；

Wherein, Power for the internal deformation; Is the deformation resistance of the rolled piece; The upward moving speed of the roller is set; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; The included angle between the connecting line of the contact point of the rolled piece and the inlet of the dynamic rolling deformation area and the center of the roller and the connecting line of the roller at any moment; the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone; the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone; Is the roll linear speed; Is a neutral angle.

The friction power may be determined by the following formula (5):

（5）；

Wherein, For said friction power; Is the deformation resistance of the rolled piece; d is the half width of the rolled piece; The upward moving speed of the roller is set; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; The included angle between the connecting line of the contact point of the rolled piece and the inlet of the dynamic rolling deformation area and the center of the roller and the connecting line of the roller at any moment; Is a neutral angle; Is the roll linear speed; the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone; the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone; Half thickness corresponding to the neutral angle; Is the roll linear speed; 。

further, the deformation resistance of the rolled piece in the above formulas (4) and (5) Can be determined by the following formula (6):

（6）；

Wherein, Is the deformation resistance of the rolled piece; Resistance to deformation in the annealed condition of the product; The rotating speed of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to that of the rolled piece at the inlet half of the inlet of the dynamic rolling deformation zone; r represents the flattening radius of the roller; 、、、、、、 Is a preset material coefficient related to deformation conditions.

Further, the distance of the outlet position of the dynamic rolling deformation zone from the roll connecting line and the distance of the inlet position of the dynamic rolling deformation zone from the roll connecting line mentioned in S2 above may be determined by the following formula (7) and formula (8), so as to facilitate the subsequent determination of the shearing power:

（7）；

（8）；

Wherein, A distance for deviating the outlet position of the dynamic rolling deformation zone from the continuous line of the roller; a distance for deviating the inlet position of the dynamic rolling deformation zone from the continuous line of the roller; An inclination angle of the dynamic rolling deformation zone; the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone; The thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone.

The distance of the outlet position of the dynamic rolling deformation zone from the roll connecting line is obtained by the formulas (7) and (8)And the distance of the inlet position of the dynamic rolling deformation zone from the continuous line of the rollerThen, the distance of the outlet position of the dynamic rolling deformation zone deviating from the continuous line of the roller can be obtainedAnd the distance of the inlet position of the dynamic rolling deformation zone from the continuous line of the rollerAnd (3) determining the shearing power of the rolled piece by combining the inclination angle of the dynamic rolling deformation zone and the half thickness of the outlet.

Specifically, the shear power of the rolled piece can be obtained by the following formula (9):

（9）；

Wherein, Shear power for the rolled piece; Is the deformation resistance of the rolled piece; Is the half width of the rolled piece; the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the outlet half of the rolled piece at the outlet of the dynamic rolling deformation zone; An inclination angle of the dynamic rolling deformation zone; Is the roll linear speed; Is a neutral angle; the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process is equal to the thickness of the inlet half of the rolled piece at the inlet of the dynamic rolling deformation zone; The upward moving speed of the roller is set; r is the flattening radius of the roller; A distance for deviating the outlet position of the dynamic rolling deformation zone from the continuous line of the roller; a distance for deviating the inlet position of the dynamic rolling deformation zone from the continuous line of the roller; Is the included angle between the connecting line of the contact point of the rolled piece and the inlet of the dynamic rolling deformation area and the center of the roller and the connecting line of the roller at any moment.

S104, determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force.

Specifically, the minimum value of the total power pan function can be represented by the following formula (10):

（10）；

Wherein, Is the total power functional; Is a neutral angle; shear power for the rolled piece; For said friction power; For said internal deformation power.

The step S104 includes: and determining the first rolling force according to the minimum value of the total power general function, the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process, the thickness of the inlet plate of the rolled piece at the dynamic rolling deformation zone in the dynamic rolling process and the inclination angle of the deformation zone.

Specifically, the first rolling force may be determined by the following formula (11):

（11）；

Wherein, Is the first rolling force; Is the roll linear speed; Is the original radius of the roller; As a function of the total power spread; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; Is the moment arm coefficient.

Moment arm coefficient in the above formula (11)Can be determined by the following equation (12):

（12）；

Wherein, Is the upward movement speed of the roller.

In another alternative embodiment of the present application, the first rolling force is also required to be optimally adjusted to eliminate the influence of the reaction force between the rolled piece and the roll on the rolling force itself, in consideration of the fact that the reaction force between the rolled piece and the roll causes slight deformation of the roll itself during dynamic rolling, which affects the rolling force during rolling.

Based on this, the rolling force determination method of the thin-to-thick dynamic rolling of the rolled piece further comprises:

S105, performing iterative optimization calculation on the first rolling force through convergence conditions between the roller radius and the rolling force, and determining a second rolling force in the dynamic rolling process of the rolled piece from thin to thick.

Specifically, the convergence condition includes:

；

Wherein, Roll radius for the nth iteration; roll radius for the n-1 th iteration;

The iterative optimization calculation may be implemented by the following equation (13):

（13）；

Wherein, Is the original radius of the roller; is the first rolling force; is the elastic modulus of the roller; d is the half width of the roller; r is the flattening radius of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; And in the dynamic rolling process, the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone is half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone.

Further, in order to facilitate understanding of the parameters in the method for determining the rolling force of the rolling stock from thin to thick in the above formulas (1) to (13), the parameters are described below with reference to fig. 3, and fig. 3 is a schematic diagram of parameter distribution provided in an embodiment of the present application.

As shown in fig. 3, fig. 3 shows a dynamic rolling process of a rolled piece from thin to thick, and fig. 3 includes:

Speed of upward movement of rolls ; Inclination angle of dynamic rolling deformation zone; Neutral angle; Any moment the contact point of the rolled piece and the inlet of the dynamic rolling deformation zone and the connecting line of the center of the roller and the connecting line of the roller form an included angle; Roll linear speed; Thin section half thickness of rolled piece; Inclination angle of dynamic rolling deformation zone; The half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; Half thickness corresponding to neutral angle; Distance between outlet position of dynamic rolling deformation zone and continuous line of roller; Distance between inlet position of dynamic rolling deformation zone and continuous line of roller。

Further, referring to fig. 4, fig. 4 is a graph showing a rolling force change with time according to an embodiment of the present application.

As shown in FIG. 4, the rolling force calculated by the method provided by the application is basically the same as the rolling force actually generated, which indicates that the calculation accuracy of the method is higher.

In summary, according to the method for determining the rolling force of the dynamic rolling of the rolled piece from thin to thick, provided by the application, the minimum value of the total power universal function at any moment in the dynamic rolling process can be determined through the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece; and determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force. The method can accurately determine the rolling force in the dynamic rolling process of the rolled piece from thin to thick, and is beneficial to improving the yield of the rolled piece. Meanwhile, the embodiment of the application combines the convergence condition between the radius of the roller and the rolling force to further iterate and optimize the first rolling force, thereby improving the accuracy in the process of calculating the rolling force.

Second part, device embodiment

Corresponding to the above method embodiment, the embodiment of the present application further provides a rolling force determining device for dynamic rolling of a rolled piece from thin to thick, please refer to fig. 5, and fig. 5 is a diagram illustrating the rolling force determining device for dynamic rolling of a rolled piece from thin to thick according to the embodiment of the present application.

As shown in fig. 5, the rolling force determining apparatus for dynamic rolling of a rolled piece from thin to thick includes:

A first unit 501 for determining an inclination angle of a dynamic rolling deformation zone according to a half thickness of a rolled piece and a length of the dynamic rolling deformation zone;

a second unit 502, configured to determine an outlet half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and an upward movement speed of a roller in the dynamic rolling process;

A third unit 503, configured to determine a minimum value of a total power universal function at any time in a dynamic rolling process according to an inclination angle of the dynamic rolling deformation region, the outlet half thickness and a deformation resistance of the rolled piece;

a fourth unit 504 is configured to determine a first rolling force during dynamic rolling of the rolled piece from thin to thick based on a relationship between the minimum value of the total power spread and the rolling force.

In an alternative embodiment of the present application, the apparatus further comprises:

And the fifth unit is used for carrying out iterative optimization calculation on the first rolling force through convergence conditions between the roller radius and the rolling force, and determining the second rolling force in the dynamic rolling process of the rolled piece from thin to thick.

In an alternative embodiment of the present application, the determining the inclination angle of the dynamic rolling deformation zone according to the half thickness of the rolled piece and the length of the dynamic rolling deformation zone includes:

Determining the thickness of the thick region half of the rolled piece, the thickness of the thin region half of the rolled piece and the length of the dynamic rolling deformation region based on short-flow headless continuous casting and rolling process specification data;

And determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick zone half of the rolled piece, the thickness of the thin zone half of the rolled piece and the length of the dynamic rolling deformation zone.

In an alternative embodiment of the present application, the determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick half of the rolled piece, the thickness of the thin half of the rolled piece, and the length of the dynamic rolling deformation zone is achieved by the following formula:

；

Wherein, An inclination angle of the dynamic rolling deformation zone; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; l is the length of the dynamic rolling deformation zone.

In an alternative embodiment of the present application, the determining the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone during the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of the roller during the dynamic rolling process is implemented by the following formula:

；

；

Wherein, Representing a dynamic rolling time of the rolled piece; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; the upward moving speed of the roller is set; t represents any time in the dynamic rolling process; The thickness of the rolling piece is half of the thickness of the rolling piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process.

In an alternative embodiment of the application, the device is further adapted to:

Determining deformation resistance of the rolled piece in an annealing state, rotating speed of a roller and half thickness of an inlet of the rolled piece in the dynamic rolling deformation area in a dynamic rolling process;

And determining the deformation resistance of the rolled piece according to the deformation resistance of the rolled piece in an annealing state, the rotating speed of the roller, the inlet half thickness and the outlet half thickness.

In an alternative embodiment of the application, the determination of the deformation resistance of the rolled stock according to the deformation resistance in the annealed state of the rolled stock, the roll speed, the inlet half-thickness and the outlet half-thickness is carried out by the following formula:

；

Wherein, Is the deformation resistance of the rolled piece; Resistance to deformation in the annealed condition of the product; The rotating speed of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r represents the flattening radius of the roller; 、、、、、、 Is a preset material coefficient related to deformation conditions.

In an alternative embodiment of the present application, the determining the first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relationship between the minimum value of the total power pan function and the rolling force includes:

the first rolling force is determined by the following formula:

；

Wherein, Is the first rolling force; Is the roll linear speed; Is the original radius of the roller; As a function of the total power spread; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; Is the moment arm coefficient.

In an optional embodiment of the present application, the iterative optimization calculation is performed on the first rolling force according to the convergence condition between the radius of the roll and the rolling force, and the determining the second rolling force in the dynamic rolling process from thin to back of the rolled piece includes:

The convergence condition includes:

；

Wherein, Roll radius for the nth iteration; roll radius for the n-1 th iteration;

the iterative optimization calculation is realized by the following formula:

Wherein, Is the original radius of the roller; is the first rolling force; is the elastic modulus of the roller; d is the half width of the roller; r is the flattening radius of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; And in the dynamic rolling process, the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone is half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone.

The rolling force determining device for dynamic rolling of the rolled piece from thin to thick provided by the embodiment of the application belongs to the same application conception as the rolling force determining method for dynamic rolling of the rolled piece from thin to thick provided by the embodiment of the application, and the method provided by any embodiment of the application can be executed, and the rolling force determining device has the corresponding functional modules and beneficial effects of executing the method. Technical details not described in detail in this embodiment may be referred to the specific processing content of the method provided in the foregoing embodiment of the present application, and will not be described herein.

Third part, electronic device embodiment

The embodiment of the application also provides an electronic device, as shown in fig. 6, and fig. 6 is a schematic structural diagram of the electronic device according to the embodiment of the application.

As shown in fig. 6, the electronic device includes:

A processor 210;

a memory 200 for storing instructions executable by the processor 210;

The processor 210 is configured to execute the rolling force determining method for dynamic rolling of a rolled piece from thin to thick as disclosed in any of the above embodiments by executing the instructions in the memory 200.

The processor 210, the memory 200, the communication interface 220, the input device 230, and the output device 240 are interconnected by a bus. Wherein:

a bus may comprise a path that communicates information between components of a computer system.

Processor 210 may be a general-purpose processor, such as a general-purpose Central Processing Unit (CPU), microprocessor, etc., or may be an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of programs in accordance with aspects of the present invention. But may also be a Digital Signal Processor (DSP), application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components.

Processor 210 may include a main processor, and may also include a baseband chip, modem, and the like.

The memory 200 stores programs for implementing the technical scheme of the present invention, and may also store an operating system and other key services. In particular, the program may include program code including computer-operating instructions. More specifically, memory 200 may include read-only memory (ROM), other types of static storage devices that may store static information and instructions, random access memory (random access memory, RAM), other types of dynamic storage devices that may store information and instructions, disk storage, flash, and the like.

Input device 230 may include means for receiving data and information entered by a user, such as a keyboard, mouse, camera, scanner, touch screen, etc.

Output device 240 may include means, such as a display screen, printer, speakers, etc., that allow information to be output to a user.

The communication interface 220 may include devices using any transceiver or the like for communicating with other devices or communication networks, such as ethernet, radio Access Network (RAN), wireless Local Area Network (WLAN), etc.

The processor 210 executes programs stored in the memory 200 and invokes other devices, which can be used to implement the steps of the rolling force determination method for thin-to-thick dynamic rolling of any rolled piece provided by the above-described embodiments of the present application.

Fourth part, computer program product and storage medium embodiments

In addition to the above-described methods and apparatus, embodiments of the present application may also be a computer program product comprising computer program instructions which, when executed by a processor, cause the processor to perform the steps in the rolling force determination method of thin-to-thick dynamic rolling of a rolled piece according to various embodiments of the present application described in the above-described first part of the specification.

The computer program product may write program code for performing operations of embodiments of the present application in any combination of one or more programming languages, including an object oriented programming language such as Java, C++ or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device, partly on a remote computing device, or entirely on the remote computing device or server.

Furthermore, an embodiment of the present application may also be a storage medium having stored thereon a computer program for executing the steps of the rolling force determination method for thin-to-thick dynamic rolling of a rolled piece according to various embodiments of the present application described in the above first section of the present specification by a processor.

For the foregoing method embodiments, for simplicity of explanation, the methodologies are shown as a series of acts, but one of ordinary skill in the art will appreciate that the present application is not limited by the order of acts, as some steps may, in accordance with the present application, occur in other orders or concurrently. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other. For the apparatus class embodiments, the description is relatively simple as it is substantially similar to the method embodiments, and reference is made to the description of the method embodiments for relevant points.

The steps in the method of each embodiment of the application can be sequentially adjusted, combined and deleted according to actual needs, and the technical features described in each embodiment can be replaced or combined.

In the embodiments of the present application, the modules and sub-modules in the terminal may be combined, divided, and pruned according to actual needs.

In the embodiments provided in the present application, it should be understood that the disclosed terminal, apparatus and method may be implemented in other manners. For example, the above-described terminal embodiments are merely illustrative, and for example, the division of modules or sub-modules is merely a logical function division, and there may be other manners of division in actual implementation, for example, multiple sub-modules or modules may be combined or integrated into another module, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules or sub-modules illustrated as separate components may or may not be physically separate, and components that are modules or sub-modules may or may not be physical modules or sub-modules, i.e., may be located in one place, or may be distributed over multiple network modules or sub-modules. Some or all of the modules or sub-modules may be selected according to actual needs to achieve the purpose of the embodiment.

In addition, each functional module or sub-module in the embodiments of the present application may be integrated in one processing module, or each module or sub-module may exist alone physically, or two or more modules or sub-modules may be integrated in one module. The integrated modules or sub-modules may be implemented in hardware or in software functional modules or sub-modules.

Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative elements and steps are described above generally in terms of functionality in order to clearly illustrate the interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software unit executed by a processor, or in a combination of the two. The software elements may be disposed in Random Access Memory (RAM), memory, read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A rolling force determination method for dynamic rolling of a rolled piece from thin to thick, comprising:

Determining the inclination angle of a dynamic rolling deformation zone according to the half thickness of a rolled piece and the length of the dynamic rolling deformation zone;

Determining the outlet half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of a roller in the dynamic rolling process;

Determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece;

And determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force.

2. The rolling force determination method for dynamic rolling of a rolled piece from thin to thick according to claim 1, further comprising:

And carrying out iterative optimization calculation on the first rolling force through convergence conditions between the roller radius and the rolling force, and determining a second rolling force in the dynamic rolling process of the rolled piece from thin to thick.

3. The method of determining rolling force for dynamic rolling of a rolled material from thin to thick according to claim 1, wherein the determining the inclination angle of the dynamic rolling deformation region based on the half thickness of the rolled material and the length of the dynamic rolling deformation region comprises:

Determining the thickness of the thick region half of the rolled piece, the thickness of the thin region half of the rolled piece and the length of the dynamic rolling deformation region based on short-flow headless continuous casting and rolling process specification data;

And determining the inclination angle of the dynamic rolling deformation zone according to the thickness of the thick zone half of the rolled piece, the thickness of the thin zone half of the rolled piece and the length of the dynamic rolling deformation zone.

4. A rolling force determination method for dynamic rolling of a rolled piece from thin to thick according to claim 3, wherein the determining of the inclination angle of the dynamic rolling deformation zone is achieved by the following formula according to the thickness of the thick zone half of the rolled piece, the thickness of the thin zone half of the rolled piece and the length of the dynamic rolling deformation zone:

；

Wherein, An inclination angle of the dynamic rolling deformation zone; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; l is the length of the dynamic rolling deformation zone.

5. The method for determining rolling force of rolling stock from thin to thick according to claim 1, wherein the step of determining the outlet half thickness of the rolling stock at the outlet of the dynamic rolling deformation zone during dynamic rolling is performed by the following formula according to the half thickness of the rolling stock and the upward moving speed of the rolls during dynamic rolling:

；

t；

Wherein, Representing a dynamic rolling time of the rolled piece; Half thickness of a thick area of the rolled piece; A thin section half thickness of the rolled piece; the upward moving speed of the roller is set; t represents any time in the dynamic rolling process; The thickness of the rolling piece is half of the thickness of the rolling piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process.

6. The rolling force determination method for dynamic rolling of a rolled piece from thin to thick according to claim 1, further comprising:

Determining deformation resistance of the rolled piece in an annealing state, rotating speed of a roller and half thickness of an inlet of the rolled piece in the dynamic rolling deformation area in a dynamic rolling process;

And determining the deformation resistance of the rolled piece according to the deformation resistance of the rolled piece in an annealing state, the rotating speed of the roller, the inlet half thickness and the outlet half thickness.

7. The method of determining rolling force for dynamically rolling a rolled material from thin to thick according to claim 6, wherein said determining the deformation resistance of said rolled material based on the deformation resistance in the annealed state of said rolled material, said roll rotation speed, said inlet half thickness and said outlet half thickness is accomplished by the following formula:

；

Wherein, Is the deformation resistance of the rolled piece; Resistance to deformation in the annealed condition of the product; The rotating speed of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r represents the flattening radius of the roller; 、、、、、、 Is a preset material coefficient related to deformation conditions.

8. The method of claim 1, wherein determining the first rolling force during the thin-to-thick dynamic rolling of the rolled piece based on the relationship between the minimum value of the total power pan function and the rolling force comprises:

the first rolling force is determined by the following formula:

；

Wherein, Is the first rolling force; Is the roll linear speed; Is the original radius of the roller; As a function of the total power spread; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; The half thickness of the rolled piece at the inlet of the dynamic rolling deformation zone in the dynamic rolling process; r is the flattening radius of the roller; An inclination angle of the dynamic rolling deformation zone; Is the moment arm coefficient.

9. The method for determining rolling force of rolling stock from thin to thick according to claim 2, wherein the iterative optimization calculation is performed on the first rolling force by means of convergence conditions between the radius of the roll and the rolling force, and the method for determining the second rolling force in the dynamic rolling process of the rolling stock from thin to back comprises:

The convergence condition includes:

；

Wherein, Roll radius for the nth iteration; roll radius for the n-1 th iteration;

the iterative optimization calculation is realized by the following formula:

；

Wherein, Is the original radius of the roller; is the first rolling force; is the elastic modulus of the roller; d is the half width of the roller; r is the flattening radius of the roller; The thickness of the rolled piece is half of the thickness of the outlet of the dynamic rolling deformation zone in the dynamic rolling process; And in the dynamic rolling process, the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone is half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone.

10. A rolling force determining apparatus for dynamic rolling of a rolled material from thin to thick, comprising:

The first unit is used for determining the inclination angle of the dynamic rolling deformation zone according to the half thickness of the rolled piece and the length of the dynamic rolling deformation zone;

The second unit is used for determining the half thickness of the rolled piece at the outlet of the dynamic rolling deformation zone in the dynamic rolling process according to the half thickness of the rolled piece and the upward moving speed of the roller in the dynamic rolling process;

The third unit is used for determining the minimum value of the total power universal function at any moment in the dynamic rolling process according to the inclination angle of the dynamic rolling deformation zone, the half thickness of the outlet and the deformation resistance of the rolled piece;

And a fourth unit for determining a first rolling force in the dynamic rolling process of the rolled piece from thin to thick based on the relation between the minimum value of the total power general function and the rolling force.