CN112264561B - Method and device for coordinated control of axial roller and radial main roller of ring rolling mill - Google Patents
Method and device for coordinated control of axial roller and radial main roller of ring rolling mill Download PDFInfo
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- CN112264561B CN112264561B CN202011472353.3A CN202011472353A CN112264561B CN 112264561 B CN112264561 B CN 112264561B CN 202011472353 A CN202011472353 A CN 202011472353A CN 112264561 B CN112264561 B CN 112264561B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H1/00—Making articles shaped as bodies of revolution
- B21H1/06—Making articles shaped as bodies of revolution rings of restricted axial length
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/46—Roll speed or drive motor control
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Abstract
The invention provides a method and a device for coordinately controlling the speed of an axial roller and a radial main roller of a ring rolling mill, belonging to the field of metal rolling, and the invention provides the method and the device for coordinately controlling the speed of the axial roller and the radial main roller of the ring rolling mill, comprising the following steps: the method comprises the steps of obtaining shape information of a main roller and a conical roller, and obtaining relative position information between a workpiece and a moving surface of the conical roller in real time; and matching the rotating speeds of the main rolling roller and the conical roller so that the linear speed of the contact between the main rolling roller and the workpiece is the same as the linear speed of the contact between the conical roller and the workpiece. In the radial and axial rolling process of the large annular forging, an axial roller and radial main roller speed coordination control method is adopted to control the synchronous motion of the two axial upper and lower rollers and coordinate with the radial main roller speed, so that the radial and axial rolling of the large annular forging is fast and stable in operation, the required microstructure performance and macroscopic size requirements are met, and the quality of the annular forging is improved.
Description
Technical Field
The invention belongs to the field of metal rolling, and particularly relates to a method and a device for coordinately controlling the speed of an axial roller and a radial main roller of a ring rolling mill.
Background
In the rolling process of the existing aerospace large-scale annular forging, the smooth operation of the rolling process and the comprehensive performance of the annular forging are directly determined by the coordination control of the radial main roller and the axial roller. The axial rollers are generally divided into an upper axial roller and a lower axial roller, and the upper axial roller and the lower axial roller are synchronous. In the existing equipment, the problem of inconsistent speed of two axial rollers and a radial main roller often occurs, and the rolling efficiency of a machined part and the final quality of an annular forge piece are influenced.
Disclosure of Invention
The invention provides a method and a device for coordinately controlling the speed of an axial roller and a radial main roller of a ring rolling mill, which aim to solve the problems that the speed of the two axial rollers and the speed of the radial main roller are often inconsistent, and the rolling efficiency of a machined part and the final quality of a ring forging are influenced in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a coordinated control method for the speed of an axial roller and a radial main roller of a ring rolling mill is used for a control system of the ring rolling mill and comprises the following steps:
the method comprises the steps of obtaining shape information of a main roller and a conical roller, and obtaining relative position information between a workpiece and a moving surface of the conical roller in real time;
and matching the rotating speeds of the main rolling roller and the conical roller so that the linear speed of the contact between the main rolling roller and the workpiece is the same as the linear speed of the contact between the conical roller and the workpiece.
The acquired shape information of the main roller at least comprises the diameter of the main roller;
the acquired shape information of the conical roller at least comprises the maximum outer diameter of the conical roller, the distance between the maximum outer diameter of the conical roller and the tip end of the conical roller and the maximum diameter of the conical roller.
The relative position information is specifically the distance between the distance measuring device and the outer diameter of the workpiece, and the distance between the distance measuring device and the outer diameter of the workpiece is used for determining the maximum linear speed of the outer diameter of the workpiece driven by the conical roller to rotate.
When the rotating speeds of the main roller and the conical roller are matched, the rotating speed n of the conical roller matched with the main roller3=
；
Wherein n is3Is the rotating speed of the conical roller, n1 is the rotating speed of the main roller, D1 is the diameter of the main roller, D5 is the maximum diameter of the conical roller, M is the distance between the maximum outer diameter of the conical roller and the tip end thereof, F is the distance between the distance measuring device and the maximum outer diameter of the conical roller, and H is the distance between the distance measuring device and the outer diameter of the workpiece.
The conical rolls comprise an upper axial rolling conical roll and a lower axial rolling conical roll, and a control system of the ring rolling mill is used for matching the linear speed of the contact between the upper axial rolling conical roll and the workpiece with the linear speed of the contact between the main roll and the workpiece;
and the control system of the ring rolling mill is used for matching the linear speed of the contact between the axial rolling lower conical roller and the workpiece with the linear speed of the contact between the main roller and the workpiece.
Further comprising:
the control system of the ring rolling mill is used for matching the pressure of the axial rolling upper conical roller and the pressure of the axial rolling lower conical roller with the pressure of the workpiece, so that the pressure of the axial rolling upper conical roller and the pressure of the workpiece are the same as the pressure of the axial rolling lower conical roller and the pressure of the workpiece.
The power source of the main roller is a first servo motor, the power source of the conical roller is a second servo motor, and the control system of the ring rolling mill matches the rotating speeds of the main roller and the conical roller by controlling the first servo motor and the second servo motor.
A coordinated control device for the speed of an axial roller and a radial main roller of a ring rolling mill comprises:
a processing unit;
the signal transceiving module is used for transceiving the information of the processing unit;
the processing unit is used for realizing the speed coordination control method of the axial roller and the radial main roller of the ring rolling mill.
The method has the advantages that the speed coordination control method of the axial roller and the radial main roller is adopted in the radial and axial rolling process of the large annular forging, the rotating speed of the main roller and the rotating speed of the conical roller are coordinated and controlled, the large annular forging can run quickly and stably in the radial and axial rolling process, the required microstructure performance and macro size requirements can be met, and the quality of the annular forging can be improved.
Drawings
FIG. 1 is a schematic view of the overall structure of a radial-axial ring rolling mill to which the coordinated control method of the axial roll and the radial main roll speed of the ring rolling mill of the present invention is applied;
FIG. 2 is a block diagram of the structure of the coordinated control method for the axial roll and the radial main roll of the ring rolling mill.
FIG. 3 is a diagram of various technical parameter identifiers used for calculation in the coordinated control method for the speeds of the axial roller and the radial main roller of the ring rolling mill.
The reference mark is 1, axially rolling a lower conical roller; 2. axially rolling the holding roller; 3. axially rolling an upper conical roller; 4. radially rolling a holding roller; 5. an axial rolling driving oil cylinder; 6. a core roll; 7. the axial rolling device is provided with a balance oil cylinder; 8. the upper conical roller drives a speed reducer; 9. axially rolling the movable frame; 10. a distance measuring device; 11. the axial rolling moving frame drives the oil cylinder; 12. axially rolling the movable rack guide rail; 13. the lower conical roller drives a speed reducer; 14. and (5) main rolling.
Detailed Description
It should be noted that, as shown in fig. 1, the radial-axial ring rolling mill applied in the method for detecting the diameter of the ring rolling mill in real time in the rolling process of the present invention includes: the rolling device comprises an axial rolling lower conical roller 1, an axial rolling holding roller 2, an axial rolling upper conical roller 3, a radial rolling holding roller 4, an axial rolling driving oil cylinder 5, a core roller 6, an axial rolling device balance oil cylinder 7, an upper conical roller driving speed reducer 8, an axial rolling moving rack 9, a distance measuring device 10, an axial rolling moving rack driving oil cylinder 11, an axial rolling moving rack guide rail 12, a lower conical roller driving speed reducer 13 and a main roller 14. During the rolling process of large workpieces, the workpieces are fed by the core roller 6 and approach the main roller 14, and the axial rolling upper conical roller 3 is fed, the sizes of the workpieces are gradually increased, the axial rolling movable rack 9 is gradually retreated according to the trend of the larger workpieces under the control of a program, and during the continuous increasing process of the workpieces, a displacement sensor and a distance measuring device 10 which are arranged in an axial rolling movable rack driving oil cylinder 11 on the axial rolling movable rack 9 can detect the increase of the diameters of the workpieces, and the positions of the workpieces on the axial rolling upper conical roller 3 and/or the axial rolling lower conical roller 1 can be detected. The data measured by the displacement sensor and the distance measuring device 10 are transmitted to the control system of the ring rolling mill, and the control system of the ring rolling mill controls the axial rolling moving rack 9 to continuously retreat along with the rolling of the workpiece.
FIG. 3 is a diagram of technical parameter identifiers for calculation in the coordinated control method of the axial roller and the radial main roller of the ring rolling mill of the present invention, wherein the alphabetical meaning of each technical parameter is as follows:
d1-diameter of main roll;
d2-core roll diameter;
d3-diameter of the conical roller at the position of the outer diameter of the workpiece;
d4-work piece outer diameter;
d5-cone maximum diameter;
a-the axial spacing between the main roll and the core roll;
b-the minimum starting position of the conical roller rolling;
c is the distance between the position of the conical roller and the minimum initial position of the conical roller;
e-the length of a rolling bus of the conical roller;
f-the maximum outer diameter distance between the distance measuring device and the conical roller;
k-workpiece wall thickness;
the distance between the maximum outer diameter of the M-cone roller and the tip end of the M-cone roller;
h-distance measuring device and the distance of the outer diameter of the workpiece;
p-the outer diameter of the workpiece is positioned at a certain fixed point of the conical roller;
and when the outer diameter of the O-shaped workpiece is at a certain fixed point P of the conical roller, the distance from the point P to the left end of the generatrix of the conical roller.
The calculation formulas involved in fig. 3 are respectively:
1. workpiece wall thickness K = a- (D1)/2- (D2)/2.
2. Outer diameter D of work piece4=B+C+F-H。
3. Rotating speed n of conical roller matched with main roller3=
(ii) a Where n 1-the main roll speed,
n3-the rotational speed of the conical rolls.
4. When the wall thickness neutral surface of the workpiece is positioned at the midpoint of the generatrix of the conical roller, the distance between the position of the conical roller and the minimum initial position of the conical roller in rolling
C’=D4-B+
C’-C=
When C '-C is greater than 0, the wall thickness neutral surface of the workpiece is positioned on the right of the midpoint of the generatrix of the conical roller, and the conical roller is retreated to the corresponding point of C'. When C '-C is less than 0, the neutral surface of the wall thickness of the workpiece is positioned at the left of the midpoint of the generatrix of the conical roller, the conical roller is not moved, and C = C' is waited.
5. When the outer diameter of the workpiece is at a certain fixed point P of the conical roller, the distance between the position of the conical roller and the minimum initial position of the conical roller for rolling
C’= D4-B-(E-O)
C’-C=（H-F）-（E-O）
When C '-C >0, the outer diameter of the workpiece is positioned at the right side of the point P, and the conical roller is retreated to the corresponding point C'. When C '-C <0, the workpiece outer diameter is left of point P, the conical roller is stationary, and C = C' is waited.
The coordinated control scheme of the axial roller and the radial main roller of the ring rolling machine provided by the embodiment of the invention is described in detail by several specific embodiments.
Example 1
Referring to fig. 1 and fig. 2, the method for coordinately controlling the speeds of the axial roll and the radial main roll of the ring rolling mill of the present invention is applied to a control system of the ring rolling mill, and includes:
the method comprises the steps of obtaining shape information of a main roller 14 and a conical roller, and obtaining relative position information between a workpiece and a moving surface of the conical roller in real time;
the rotational speeds of the main roll 14 and the conical roll are matched so that the linear speed of the contact between the main roll 14 and the workpiece is the same as the linear speed of the contact between the conical roll and the workpiece.
In the above embodiment, as shown in fig. 1, the ring rolling mill of the present embodiment is a radial-axial ring rolling mill, which includes a radial rolling section and an axial rolling section.
In one example, the acquired shape information of the main roll 14 includes at least a diameter of the main roll 14. The acquired shape information of the conical roller at least comprises the distance between the maximum outer diameter of the conical roller and the tip end of the conical roller and the maximum diameter of the conical roller. The relative position information is specifically the distance between the distance measuring device 10 and the outer diameter of the workpiece, and the distance between the distance measuring device 10 and the outer diameter of the workpiece is used for determining the maximum linear speed of the outer diameter of the workpiece driven by the conical roller to rotate. As shown in fig. 3, the acquired shape information of the main roll 14 and the conical rolls includes a diameter D1 of the main roll 14, a maximum diameter D5 of the conical rolls, and a maximum outer diameter of the conical rolls and a tip distance M thereof. Because the end part of the conical roller is conical, when the workpiece is contacted with different positions of the conical roller, the conical roller drives the workpiece to rotate at different speeds. For example, when the workpiece is in contact with the tip of the conical roller at the same rotation speed, the rotation speed of the workpiece is small; when the machined part contacts with the rear end of the conical roller, the rotating speed of the machined part is high. Therefore, the relative position information between the workpiece and the moving surface of the conical roller needs to be acquired in real time to know the mutual transmission speed ratio between the conical roller and the workpiece.
In one example, when the rotation speeds of the main roll 14 and the conical roll are matched, the rotation speed n of the conical roll matched with the main roll 143=
Wherein n is3Is the speed of the conical roller, n1 is the speed of the main roller 14, D1 is the diameter of the main roller 14, D5 is the maximum diameter of the conical roller, M is the distance between the maximum outer diameter of the conical roller and the tip end thereof, F is the distance between the distance measuring device 10 and the maximum outer diameter of the conical roller, and H is the distance between the distance measuring device 10 and the outer diameter of the workpiece. As shown in fig. 3, the formula n is adopted3=
The rotational speed of the conical rolls and the main roll 14 can be calculated to match the linear speed of the contact between the main roll 14 and the workpiece to the linear speed of the contact between the conical rolls and the workpiece. Wherein, as shown in fig. 1, the conical rolls may include an axially rolled lower conical roll 1 and/or an axially rolled upper conical roll 3. The above rotational speed n3=
For calculating the matched rotating speed needed by the single axial rolling lower conical roller 1 or the axial rolling upper conical roller 3.
Therefore, in the embodiment, the rotating speeds of the main roller and the conical roller are coordinately controlled, so that the radial and axial rolling of the large annular forging is rapidly and stably operated, the required microstructure performance and macroscopic size requirements are met, and the quality of the annular forging is improved.
Example 2
Further, referring to fig. 1 and fig. 2, in another embodiment of the method for coordinately controlling speeds of an axial rolling roll and a radial main rolling roll of a ring rolling mill according to the present invention, the relative position information is specifically a distance between a distance measuring device 10 and an outer diameter of a workpiece, the conical rolls include an axial upper rolling conical roll 3 and an axial lower rolling conical roll 1, and a control system of the ring rolling mill is configured to match a linear speed of a contact between the axial upper rolling conical roll 3 and the workpiece to be the same as a linear speed of a contact between the main rolling roll 14 and the workpiece;
the control system of the ring rolling mill is used for matching the linear speed of the contact between the axial rolling lower conical roller 1 and the workpiece to be the same as the linear speed of the contact between the main roller 14 and the workpiece.
In the above embodiment, in the existing equipment, the problem that the speeds of the axial rolling lower conical roller 1 and the axial rolling upper conical roller 3 are not coordinated with the radial main roller 14 often occurs, so that only one of the axial rolling lower conical roller 1 and the axial rolling upper conical roller 3 is always in operation, and therefore, the rotational speeds of the axial rolling lower conical roller 1 and the axial rolling upper conical roller 3 are forcibly and respectively controlled, so that the linear speeds between the axial rolling lower conical roller 1 and the axial rolling upper conical roller 3 and the workpiece are the same as the linear speeds between the main roller 14 and the workpiece, and the acting forces of the axial rolling lower conical roller 1 and the axial rolling upper conical roller 3 can act on the workpiece when the workpiece is machined by the adjusting method, so that the quality of the product is improved, and particularly, the quality of the special-shaped workpiece is better improved when the special-shaped workpiece is machined.
Example 3
Further, referring to fig. 1 and fig. 2, another embodiment of the method for coordinately controlling the speeds of the axial roll and the radial main roll of the ring rolling mill according to the present invention further includes: the control system of the ring rolling mill is used for matching the pressure of the axial rolling upper conical roller 3, the axial rolling lower conical roller 1 and the pressure of the workpiece, so that the pressure of the axial rolling upper conical roller 3 and the pressure of the workpiece are the same as the pressure of the axial rolling lower conical roller 1 and the pressure of the workpiece.
In the above embodiment, the problem of inconsistent pressures of the upper axial rolling conical roll 3 and the lower axial rolling conical roll 1 often occurs in the prior art, and the upper and lower pressures of the upper axial rolling conical roll 3 and the lower axial rolling conical roll 1 on the workpiece may deviate, which finally results in a certain difference between the workpiece and the expected product. Therefore, when the machined part is machined, the pressure of the axial rolling upper conical roller 3 and the pressure of the axial rolling lower conical roller 1 on the machined part are forced to be the same, and the rolling efficiency of the machined part and the final quality of the annular forged piece can be effectively guaranteed.
Example 4
Further, referring to fig. 1 and fig. 2, in another embodiment of the method for coordinately controlling speeds of an axial roll and a radial main roll of a ring rolling mill according to the present invention, a power source of the main roll 14 is a first servo motor, a power source of the conical roll is a second servo motor, and a control system of the ring rolling mill matches the rotation speeds of the main roll 14 and the conical roll by controlling the first servo motor and the second servo motor.
In the above embodiment, the main roller 14 and the conical roller are individually controlled by the first servo motor and the second servo motor, and the rotating speeds of the main roller 14 and the conical roller are matched.
Example 5
Further, in another embodiment of the present invention, the apparatus for coordinately controlling the speeds of the axial roller and the radial main roller of the ring rolling mill comprises: a processing unit; the signal transceiving module is used for transceiving the information of the processing unit; the processing unit is used for realizing the speed coordination control method for the axial roller and the radial main roller of the ring rolling mill in any one of embodiments 1-4.
In the above embodiment, the signal transceiver module is configured to receive data measured by the distance measuring device 10 and the displacement sensor and send the data to the processing unit, and the processing unit is configured to execute the method for detecting the diameter of the ring rolling mill in real time in any one of embodiments 1 to 4.
For example, when the signal transceiving module is implemented in the form of a chip, the signal transceiving module is a communication interface for the chip to receive signals or transmit signals from other chips or devices.
The processing unit may be a processor or controller, for example, a central processing unit, a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array, a PLC or other programmable logic device, transistor logic, hardware components, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. A processor may also be a combination of computing functions, e.g., a combination of one or more microprocessors, a digital signal processor and a microprocessor, or the like.
While the invention has been described in connection with various embodiments, other variations to the disclosed embodiments can be understood and effected by those skilled in the art in practicing the claimed invention, from a review of the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other elements or steps, and the word "a" or "an" does not exclude a plurality. A single processor or other unit may fulfill the functions of several items recited in the claims. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
While the invention has been described in conjunction with specific features and embodiments thereof, it will be evident that various modifications and combinations can be made thereto without departing from the spirit and scope of the invention. Accordingly, the specification and figures are merely exemplary of the invention as defined in the appended claims and are intended to cover any and all modifications, variations, combinations, or equivalents within the scope of the invention. It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (5)
1. A method for coordinately controlling the speed of an axial roller and a radial main roller of a ring rolling mill is used for a control system of the ring rolling mill, and is characterized by comprising the following steps:
the method comprises the steps of obtaining shape information of a main roller and a conical roller, and obtaining relative position information between a workpiece and a moving surface of the conical roller in real time; the acquired shape information of the main roller at least comprises the diameter of the main roller; the acquired shape information of the conical roller at least comprises the maximum outer diameter of the conical roller, the distance between the maximum outer diameter of the conical roller and the tip end of the conical roller and the maximum diameter of the conical roller; the relative position information is specifically the distance between a distance measuring device and the outer diameter of the workpiece, and the distance between the distance measuring device and the outer diameter of the workpiece is used for determining the maximum linear speed of the outer diameter of the workpiece driven by the conical roller to rotate;
matching the rotating speeds of the main rolling roller and the conical roller so that the linear speed of the contact between the main rolling roller and the workpiece is the same as the linear speed of the contact between the conical roller and the workpiece; when the rotating speeds of the main roller and the conical roller are matched, the rotating speed of the conical roller matched with the main roller
Wherein n is3Is the rotating speed of the conical roller, n1 is the rotating speed of the main roller, D1 is the diameter of the main roller, D5 is the maximum diameter of the conical roller, M is the distance between the maximum outer diameter of the conical roller and the tip end thereof, F is the distance between the distance measuring device and the maximum outer diameter of the conical roller, and H is the distance between the distance measuring device and the outer diameter of the workpiece.
2. The method for coordinately controlling the speeds of an axial rolling roller and a radial main rolling roller of a ring rolling mill as claimed in claim 1, wherein said conical rollers comprise an axial rolling upper conical roller and an axial rolling lower conical roller, and a control system of said ring rolling mill is used for matching that the linear speed of the contact between said axial rolling upper conical roller and said workpiece is the same as the linear speed of the contact between said main rolling roller and said workpiece;
and the control system of the ring rolling mill is used for matching the linear speed of the contact between the axial rolling lower conical roller and the workpiece with the linear speed of the contact between the main roller and the workpiece.
3. The method for coordinately controlling the speeds of an axial roller and a radial main roller of a ring rolling mill as claimed in claim 2, further comprising:
the control system of the ring rolling mill is used for matching the pressure of the axial rolling upper conical roller and the pressure of the axial rolling lower conical roller with the pressure of the workpiece, so that the pressure of the axial rolling upper conical roller and the pressure of the workpiece are the same as the pressure of the axial rolling lower conical roller and the pressure of the workpiece.
4. The method as claimed in claim 1, wherein the power source of the main roll is a first servo motor, the power source of the conical roll is a second servo motor, and the control system of the ring rolling mill matches the rotation speeds of the main roll and the conical roll by controlling the first servo motor and the second servo motor.
5. A coordinated control device for the speed of an axial roller and a radial main roller of a ring rolling mill is characterized by comprising:
a processing unit;
the signal transceiving module is used for transceiving the information of the processing unit;
the processing unit is used for realizing the method for coordinately controlling the speed of the axial roller and the radial main roller of the ring rolling mill according to any one of claims 1 to 4.
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| CN114558964A (en) * | 2022-02-21 | 2022-05-31 | 中国重型机械研究院股份公司 | System and method for controlling axial conical roller position of radial-axial ring rolling mill |
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| JPS6310034A (en) * | 1986-07-01 | 1988-01-16 | Kobe Steel Ltd | Operating method for axial roller in ring rolling built-in with integrated temperature measurement |
| CN100404161C (en) * | 2006-09-01 | 2008-07-23 | 武汉理工大学 | Method for determining rotating speed of main shaft expanded by cold rolling |
| CN100546759C (en) * | 2006-12-06 | 2009-10-07 | 贵州安大航空锻造有限责任公司 | Rolling forming method of large and medium solid disc-shaped forge piece |
| CN101972778B (en) * | 2010-09-09 | 2012-09-26 | 西北工业大学 | Method for determining stable formation domain for radial-axial ring rolling |
| JP6650110B2 (en) * | 2015-03-31 | 2020-02-19 | 日立金属株式会社 | Ring rolling mill and method for producing rolled material |
| CN111036808B (en) * | 2019-12-31 | 2021-06-15 | 王飞 | Processing method of Ti1023 alloy special-shaped ring piece |
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