CN114626152A - System for realizing design of tilting process of constant-flow tapping of pig casting machine - Google Patents
System for realizing design of tilting process of constant-flow tapping of pig casting machine Download PDFInfo
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- 238000005266 casting Methods 0.000 title claims abstract description 51
- 238000010079 rubber tapping Methods 0.000 title claims abstract description 27
- 238000013461 design Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 33
- 230000008569 process Effects 0.000 title description 9
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 184
- 229910052742 iron Inorganic materials 0.000 claims abstract description 89
- 238000013506 data mapping Methods 0.000 claims abstract description 28
- 238000004364 calculation method Methods 0.000 claims abstract description 18
- 239000007788 liquid Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 4
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- 238000003860 storage Methods 0.000 description 6
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- 238000004519 manufacturing process Methods 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
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Abstract
A system for achieving a design of a tipping history for a constant flow tapping of an iron casting machine, comprising: the system comprises a gridding division unit, a current moment data mapping set establishing unit, a next moment rollover angle calculating unit and a rollover angle calculating unit; the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model; a current time data mapping set establishing unit for establishing a current time t, a tipping angle theta and molten iron mass M according to the established grid modeltThe data mapping set of (2); the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf; a turning angle calculation unit according to the pig machineRollover time and rollover angle, calculating rollover angular velocity. The invention realizes the constant flow tapping of the pig casting machine and solves the problem that the flow of the poured molten iron is unstable in the pig casting machine.
Description
Technical Field
The invention relates to the field of cast iron, in particular to a system for realizing the design of a tipping process of constant-flow tapping of an iron casting machine.
Background
A pig-casting machine is a device for casting pig iron blocks. The iron liquid is injected into the running casting molds one by one at one end, and is cooled in the running process of the casting molds, and when the iron liquid reaches the tail part of the iron casting machine and moves reversely, the solidified iron blocks automatically fall off from the casting molds.
The good running stability of the iron casting machine, which is an important equipment for blast furnace iron casting, is directly related to the continuity of iron casting production and the improvement of iron casting efficiency
The purpose of the pig casting machine is to cast molten iron smelted by an iron-making blast furnace into a shaped iron block. The production process requires that the flow of poured molten iron is kept constant as much as possible in the casting process, and aims to ensure that the size of iron blocks cast by each iron casting die is uniform, so that the iron blocks can be conveniently used in the next procedure. However, the conventional pig casting machine has a problem that the flow rate of poured molten iron is unstable.
Disclosure of Invention
In view of the above, the present invention has been developed to provide a system for achieving a tipping history design for a constant flow tapping of an iron casting machine that overcomes, or at least partially solves, the above-mentioned problems.
In order to solve the technical problem, the embodiment of the application discloses the following technical scheme:
a system for implementing a design of a tilting history for a constant flow tapping of an iron casting machine, comprising:
the system comprises a gridding division unit, a current time data mapping set establishing unit, a next time rollover angle calculating unit and a rollover angle calculating unit; wherein:
the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model;
a current time data mapping set establishing unit for establishing a current time t, a tipping angle theta and molten iron mass M according to the established grid modeltThe data mapping set of (2);
the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf;
and the tilting angle calculating unit is used for calculating the tilting angular speed according to the tilting time and the tilting angle of the pig casting machine.
Further, the specific method for the gridding partition unit work is as follows: the inner cavity of the molten iron tank body is a revolving body, the revolving surface is a polygon, the side wall is defined as one side, the revolving surface is changed into a quadrangle, the quadrangle mesh is divided by adopting a mapping method for the revolving surface, then the pentahedron mesh and the hexahedron mesh are generated by rotating a certain angle according to the quadrangle mesh, the generated body mesh is circumferentially arrayed along the central axis by 360 degrees, an integral three-dimensional mesh model of the inner cavity is generated, the origin of a mesh model coordinate system is moved to a taphole, and the volume and the mass center of each unit are calculated according to the mesh model.
Further, the method for establishing the data mapping set of the tip-over angle θ and the molten iron mass M by the current time data mapping set establishing unit is as follows: according to the t moment, when the tilting angle of the pig casting machine is theta, the molten iron content M at the t moment is calculated, wherein the method for calculating the molten iron content M at the t moment comprises the following steps: obtaining the coordinates (x) of the molten iron taphole0，y0) At time t, for each grid cell, the centroid coordinate (x ', y') thereof is calculated from the current tip-over angle θ, and the centroid ordinate y 'is determined from the centroid coordinate (x', y ') of each cell'<If yes, judging that the grid unit is positioned below the liquid level, increasing the mass M of the molten iron so that M is M + MiWherein M isiRepresenting the molten iron quality of the ith grid unit; otherwise, the next grid unit is judged until all grid units are judged to be finished.
Further, the formula for calculating the centroid coordinate at time t is:
wherein, (x ', y') is a centroid horizontal and vertical coordinate at the time t, theta is the current tipping angle, and (x, y) is a centroid horizontal and vertical coordinate at the initial time.
Further, at the current time t, the mass M of the molten irontThe calculation method comprises the following steps:
Mt＝minimum(mini,M)
wherein mini is the initial molten iron mass and returns to the current tilting angle thetaAnd mass M of molten iront。
Further, the concrete method for the next moment rollover angle calculation unit to work is as follows: when the molten iron content of the iron casting machine is Mt at the time t and t + dt is known, the molten iron content Mt + dt of the iron casting machine is Mt-mf dt at the time t + dt, and the tilting angle theta t + dt at the time t + dt of the molten iron mass calculation is calculated by adopting a linear interpolation mode according to the data set obtained in the S200.
Further, the working method of the flip angle calculation unit comprises the following steps:
wt＝(θt+dt-θt)/dt，
wherein, wtFor tilting angular velocity, thetat+dtTip-over angle at time t + dt, θtDt is the rollover angle at time t, and dt is the time difference between time t + dt and time t.
The technical scheme provided by the embodiment of the invention has the beneficial effects that at least:
the invention discloses a system for realizing the design of a tipping process of constant-flow tapping of an iron casting machine, which comprises: the system comprises a gridding division unit, a current time data mapping set establishing unit, a next time rollover angle calculating unit and a rollover angle calculating unit; wherein: the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model; a current time data mapping set establishing unit for establishing a current time t, a tipping angle theta and molten iron mass M according to the established grid modeltThe data mapping set of (2); the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf; and the tilting angle calculating unit is used for calculating the tilting angular speed according to the tilting time and the tilting angle of the pig casting machine. The invention realizes the constant flow tapping of the pig casting machine and solves the problem that the flow of the poured molten iron is unstable in the pig casting machine.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
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 principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a block diagram of a system for implementing a design of a tilting history for constant flux tapping of an iron casting machine in accordance with example 1 of the present invention;
fig. 2 is a schematic diagram of dividing a gridding partition unit according to embodiment 1 of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
To address the problems of the prior art, embodiments of the present invention provide a system for implementing a tip over schedule design for constant flow tapping of an iron casting machine.
Example 1
The embodiment discloses a system for realizing a tilting process design of a constant-flow tapping of an iron casting machine, which comprises the following components in part by weight as shown in figure 1: the system comprises a gridding division unit, a current moment data mapping set establishing unit, a next moment rollover angle calculating unit and a rollover angle calculating unit; wherein:
the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model;
a current time data mapping set establishing unit for establishing a current time t, a tipping angle theta and molten iron mass M according to the established grid modeltThe data mapping set of (2);
the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf;
and the tilting angle calculating unit is used for calculating the tilting angular speed according to the tilting time and the tilting angle of the pig casting machine.
In this embodiment, as shown in fig. 2, a specific method for operating the gridding partition unit is as follows: the method for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing the grid model comprises the following steps: the inner cavity of the molten iron tank body is a revolving body, the revolving surface is a polygon, the side wall is defined as one side, the revolving surface is changed into a quadrangle, the quadrangle mesh is divided by adopting a mapping method for the revolving surface, then the pentahedron mesh and the hexahedron mesh are generated by rotating a certain angle according to the quadrangle mesh, the generated body mesh is circumferentially arrayed along the central axis by 360 degrees, an integral three-dimensional mesh model of the inner cavity is generated, the origin of a mesh model coordinate system is moved to a taphole, and the volume and the mass center of each unit are calculated according to the mesh model.
In this embodiment, the method for establishing the data mapping set of the tip-over angle θ and the molten iron mass M by the current time data mapping set establishing unit includes: according to the t moment, when the tilting angle of the pig casting machine is theta, the molten iron content M at the t moment is calculated, wherein the method for calculating the molten iron content M at the t moment comprises the following steps: obtaining the coordinates (x) of the molten iron taphole0，y0) At time t, for each grid cell, the centroid coordinate (x ', y') thereof is calculated from the current tip-over angle θ, and the centroid ordinate y 'is determined from the centroid coordinate (x', y ') of each cell'<If yes, judging that the grid unit is positioned below the liquid level, increasing the mass M of the molten iron so that M is M + MiWherein M isiRepresenting the molten iron quality of the ith grid unit; otherwise, judging the next grid unit until all grid units are judged completely.
In this embodiment, the formula for calculating the centroid coordinates at time t is:
wherein, (x ', y') is a centroid horizontal and vertical coordinate at the time t, theta is the current tipping angle, and (x, y) is a centroid horizontal and vertical coordinate at the initial time.
In this embodiment, at the current time t, the mass M of molten irontThe calculation method comprises the following steps:
Mt＝minimum(mini,M)
wherein, (x ', y') is a centroid horizontal and vertical coordinate at the time t, theta is the current tipping angle, and (x, y) is a centroid horizontal and vertical coordinate at the initial time.
In this embodiment, the specific method for the next rollover angle calculation unit to work is as follows: if the molten iron content of the pig casting machine is Mt at the time t and t + dt is known, the molten iron content Mt + dt of the pig casting machine is Mt-mf point dt at the time t + dt, and the rollover angle theta t + dt at the time t + dt of the molten iron mass calculation is calculated by adopting a linear interpolation mode according to the data set obtained in the step S200.
In this embodiment, the working method of the flip angle calculation unit is as follows:
wt＝(θt+dt-θt)/dt，
wherein wtFor tilting angular velocity, thetat+dtTip angle at time t + dt, θtDt is the rollover angle at time t, and dt is the time difference between time t + dt and time t.
The system for realizing the design of the tilting process of the constant-flow tapping of the pig machine disclosed by the embodiment comprises the following components: the system comprises a gridding division unit, a current moment data mapping set establishing unit, a next moment rollover angle calculating unit and a rollover angle calculating unit; wherein: the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model; a current time data mapping set establishing unit for establishing a current time t, a tipping angle theta and molten iron mass M according to the established grid modeltThe data mapping set of (2); the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf; and the tilting angle calculating unit is used for calculating the tilting angular speed according to the tilting time and the tilting angle of the pig casting machine. The invention realizes the constant flow tapping of the pig casting machine and solves the problem that the pig casting machine still has the problem of pouring molten ironThe flow rate is unstable.
It should be understood that the specific order or hierarchy of steps in the processes disclosed is an example of exemplary approaches. Based upon design preferences, it is understood that the specific order or hierarchy of steps in the processes may be rearranged without departing from the scope of the present disclosure. The accompanying method claims present elements of the various steps in a sample order, and are not intended to be limited to the specific order or hierarchy presented.
In the foregoing detailed description, various features are grouped together in a single embodiment for the purpose of streamlining the disclosure. This method of disclosure is not to be interpreted as reflecting an intention that the claimed embodiments of the subject matter require more features than are expressly recited in each claim. Rather, as the following claims reflect, invention lies in less than all features of a single disclosed embodiment. Thus, the following claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the invention.
Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both. To clearly illustrate this interchangeability of hardware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system. 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 disclosure.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. The ASIC may reside in a user terminal. Of course, the processor and the storage medium may reside as discrete components in a user terminal.
For a software implementation, the techniques described herein may be implemented with modules (e.g., procedures, functions, and so on) that perform the functions described herein. The software codes may be stored in memory units and executed by processors. The memory unit may be implemented within the processor or external to the processor, in which case it can be communicatively coupled to the processor via various means as is known in the art.
What has been described above includes examples of one or more embodiments. It is, of course, not possible to describe every conceivable combination of components or methodologies for purposes of describing the aforementioned embodiments, but one of ordinary skill in the art may recognize that many further combinations and permutations of various embodiments are possible. Accordingly, the embodiments described herein are intended to embrace all such alterations, modifications and variations that fall within the scope of the appended claims. Furthermore, to the extent that the term "includes" is used in either the detailed description or the claims, such term is intended to be inclusive in a manner similar to the term "comprising" as "comprising" is interpreted when employed as a transitional word in a claim. Furthermore, any use of the term "or" in the specification of the claims is intended to mean a "non-exclusive or".
Claims (7)
1. A system for implementing a design of a tilting history for a constant flow tapping of an iron casting machine, comprising:
the system comprises a gridding division unit, a current moment data mapping set establishing unit, a next moment rollover angle calculating unit and a rollover angle calculating unit; wherein:
the gridding division unit is used for gridding and dividing the revolution surface of the inner cavity of the molten iron tank body and establishing a grid model;
a data mapping set establishing unit at the current time establishes the current time t, the tipping angle theta and the molten iron mass M according to the established grid modeltThe data mapping set of (2);
the next moment rollover angle calculation unit establishes the data set obtained by the unit according to the current moment data mapping set and calculates the current moment molten iron mass MtCalculating the tipping angle of the next moment according to the tipping angle theta and the tapping flow mf;
and the tilting angle calculating unit is used for calculating the tilting angular speed according to the tilting time and the tilting angle of the pig casting machine.
2. The system for designing a tilting history for achieving constant flow tapping of an iron casting machine as claimed in claim 1, wherein the specific method of operation of the gridding partition unit is as follows: the inner cavity of the molten iron tank body is a revolving body, the revolving surface is a polygon, the side wall is defined as one side, the revolving surface is changed into a quadrangle, the quadrangle mesh is divided by adopting a mapping method for the revolving surface, then the pentahedron mesh and the hexahedron mesh are generated by rotating a certain angle according to the quadrangle mesh, the generated body mesh is circumferentially arrayed along the central axis by 360 degrees, an integral three-dimensional mesh model of the inner cavity is generated, the origin of a mesh model coordinate system is moved to a taphole, and the volume and the mass center of each unit are calculated according to the mesh model.
3. The system for designing a tilting history of a constant flow tapping of an iron casting machine according to claim 1, wherein the data map set creating unit at the current time creates the data map set of the tilting angle θ and the mass M of molten iron by: according to the t moment, when the tilting angle of the pig casting machine is theta, the molten iron content M at the t moment is calculated, wherein the method for calculating the molten iron content M at the t moment comprises the following steps: obtaining the coordinates (x) of the molten iron taphole0，y0) At time t, for each grid cell, its centroid coordinate (x ', y') is calculated from the current tip-over angle θ, on a per-cell basisCoordinates (x ', y ') of the centroid of each cell, and the centroid ordinate y '<If yes, judging that the grid unit is positioned below the liquid level, increasing the mass M of the molten iron so that M is M + MiWherein M isiRepresenting the molten iron quality of the ith grid unit; otherwise, judging the next grid unit until all grid units are judged completely.
4. A system for implementing a design of the tilting history of a constant flow tapping of an iron casting machine as claimed in claim 3, wherein the formula for calculating the coordinates of the center of mass at time t is:
wherein, (x ', y') is a centroid horizontal and vertical coordinate at the time t, theta is the current tipping angle, and (x, y) is a centroid horizontal and vertical coordinate at the initial time.
5. System for realising the design of the tilting history of a constant-flow tapping of an iron casting machine according to claim 3, characterised in that the mass M of molten iron at the current time ttThe calculation method comprises the following steps:
Mt＝minimum(mini,M)
wherein mini is the initial molten iron mass, and the current tilting angle theta and the molten iron mass M are returnedt。
6. A system for implementing a design of the tilting history of a constant flow tapping of an iron casting machine as claimed in claim 1, wherein the tilting angle calculation unit at the next moment is operated by the specific method of: when the molten iron content of the iron casting machine is Mt at the time t and t + dt is known, the molten iron content Mt + dt of the iron casting machine is Mt-mf dt at the time t + dt, and the tilting angle theta t + dt at the time t + dt of the molten iron mass calculation is calculated by adopting a linear interpolation mode according to the data set obtained in the S200.
7. The system for designing a tilting history for achieving a constant flow capacity tapping of an iron casting machine as set forth in claim 6, wherein the tilting angle calculating unit operates by:
wt＝(θt+dt-θt)/dt，
wherein, wtFor tilting angular velocity, thetat+dtTip-over angle at time t + dt, θtDt is the rollover angle at time t, and dt is the time difference between time t + dt and time t.
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| JPH04116111A (en) * | 1990-09-04 | 1992-04-16 | Nippon Steel Corp | Method for controlling tilting speed in automatic tilting of tilting spout |
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| JPH04116111A (en) * | 1990-09-04 | 1992-04-16 | Nippon Steel Corp | Method for controlling tilting speed in automatic tilting of tilting spout |
| JPH08302406A (en) * | 1995-05-08 | 1996-11-19 | Nippon Steel Corp | Method and device for judging timing of completion of iron tapping from tap hole of blast furnace |
| CN110616289A (en) * | 2018-06-20 | 2019-12-27 | 宝山钢铁股份有限公司 | Tapping flow control method and system for full-automatic tapping of converter |
| CN112176136A (en) * | 2020-09-24 | 2021-01-05 | 中南大学 | Method and system for modeling movement locus of furnace charge on U-shaped chute of blast furnace |
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