CN112974544B - Dynamic adjusting device and method for torque of driven working roll of Y-shaped rolling mill - Google Patents
Dynamic adjusting device and method for torque of driven working roll of Y-shaped rolling mill Download PDFInfo
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- CN112974544B CN112974544B CN202110258144.7A CN202110258144A CN112974544B CN 112974544 B CN112974544 B CN 112974544B CN 202110258144 A CN202110258144 A CN 202110258144A CN 112974544 B CN112974544 B CN 112974544B
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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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
Abstract
The invention relates to a dynamic adjusting device and a dynamic adjusting method for the moment of a driven working roll of a Y-shaped rolling mill, wherein the device comprises a hydraulic adjusting and controlling component, an upper working roll, a supporting roll, an electromagnetic adjusting and controlling roll, an electromagnetic induction coil, an electric control system and an electromagnetic rod; the supporting rollers are symmetrically arranged on the left side and the right side of the top of the upper working roller; the electromagnetic control roller is arranged right below the upper working roller; the hydraulic regulating and controlling components are respectively and symmetrically arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll; the electric control system is connected with the hydraulic regulation and control assembly; the electromagnetic control roller is internally provided with a central through hole, the electromagnetic bars are uniformly arranged in the central through hole, and the electromagnetic induction coil is wound on the electromagnetic bars. The invention has a simpler mechanical structure, but can effectively solve the edge drop problem of the plate strip by combining the bulging of the electromagnetic regulation and control roller, and has high regulation and control efficiency and strong pertinence.
Description
Technical Field
The invention relates to the technical field of metallurgical rolling, in particular to a dynamic adjusting device and method for the torque of a driven working roll of a Y-shaped rolling mill.
Background
As main equipment for producing the plate and strip materials, the rolling mill can drive rolled pieces to deform through rollers rotating in opposite directions, and then the plate and strip materials are rolled and formed. In the process of contacting the roller and the rolled piece, as the limited roll gap of the screw-down device is always kept constant, the resistance force generated in the deformation process of the rolled piece acts on the two working rollers, and then the rolling force is generated. In general, the magnitude of the rolling force is often closely related to the material of the rolled material, the reduction ratio, and the like. In the rolling process, the roller can be regarded as a simple beam structure, and the roller tends to deflect under the action of the screw-down device and the rolling force. If other auxiliary force is not applied, the roll gap presents a convex shape with the middle thickness larger than the edge thickness, and the edge thinning phenomenon is seriously caused. To solve this problem, a series of edge drop control techniques such as UCM rolling mill, UCMW rolling mill, K-WRS roll, edge control roll (EDC roll), PC rolling mill, T-WRS & C rolling mill, etc. are successively formed. The UCM rolling mill can improve the deformation of a roll system through the roll shifting of the middle roll, reduce the harmful bending moment borne by the working roll and further improve the stress state of the edge of the strip steel. The edge control roll (EDC roll) is provided with annular grooves at two ends of the working roll, and the working roll moves along the axial direction to adapt to the plate strips with different widths. The PC rolling mill changes the shape of a roll gap by adjusting the intersection angle of an upper working roll, a lower working roll and a supporting roll system so as to control the transverse thickness distribution of a rolled piece. The T-WRS & C rolling mill controls the distance of the edge of the strip steel entering the tapered section of the roller through the transverse roll shifting and crossing of the conventional working rolls, thereby achieving the purpose of reducing the edge drop degree. The advent of these techniques has greatly improved the quality of the sheet and strip material.
However, the above-mentioned techniques have a series of problems during the operation of the rolls. The UCM rolling mill needs a six-roller rolling mill with higher construction and maintenance cost, and the implementation difficulty of reforming the four-roller rolling mill into the six-roller rolling mill is high. EDC rolls are difficult to process and maintain. The PC rolling mill and the T-WRS & C rolling mill have high construction and application cost and are generally used for new projects of plate and strip production lines.
In recent years, a Y-shaped rolling mill applying a novel electromagnetic regulation and control technology is proposed, and in the research on the technology, the fact that the rolling mode of large-reducing single-roller transmission can be favorably influenced by applying resistance moment to an upper working roller is found, and the improvement of the product quality of plate and strip rolling is facilitated. The purpose of applying the resisting moment is to better regulate and control the roller shape, and because the roller system of the large-reducing single-roller transmission rolling mill is arranged, the position for applying the resisting moment is selected at the roller end of the upper working roller, and the moment applied at the roller end is diffused towards the middle section of the roller along the axial direction, so that the edge drop problem can be effectively solved.
Disclosure of Invention
In view of the above problems, an object of the present invention is to provide a dynamic torque adjustment device for a driven work roll of a Y-type rolling mill, which achieves uniform torque distribution of a roll body of the roll by flexibly controlling a resisting torque applied to an end of the roll, thereby achieving the purpose of controlling edge drop of a plate strip and obtaining a larger single-pass internal rolling reduction under the same rolling force.
The technical scheme adopted by the invention is as follows:
the invention provides a dynamic adjusting device for the torque of a driven working roll of a Y-shaped rolling mill, which comprises a hydraulic adjusting and controlling component, an upper working roll, a supporting roll, an electromagnetic adjusting and controlling roll, an electromagnetic induction coil, an electric control system and an electromagnetic rod, wherein the hydraulic adjusting and controlling component is arranged on the upper working roll; the supporting rollers are symmetrically arranged on the left side and the right side of the top of the upper working roller; the electromagnetic control roller is arranged right below the upper working roller; the hydraulic regulating and controlling components are respectively and symmetrically arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll; the electric control system is connected with the hydraulic regulation and control assembly; the electromagnetic control roller is internally provided with a central through hole, the electromagnetic bars are uniformly arranged in the central through hole, and the electromagnetic induction coil is wound on the electromagnetic bars.
Furthermore, the hydraulic regulation and control assembly comprises a hydraulic cylinder, a proportional overflow valve, a power assisting device and a fixed baffle; the hydraulic cylinders are respectively and symmetrically arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll, and piston rods of the hydraulic cylinders are connected with the roll necks of the upper working roll through the power assisting devices; the proportional overflow valve is arranged on one side of the hydraulic cylinder body; the fixed baffle plates are respectively arranged at the outer end parts of the hydraulic cylinder bodies.
Further, roll neck protection sleeves are arranged on the outer sides of roll necks at the front end and the rear end of the upper working roll, and a piston rod of the hydraulic cylinder is connected with the roll neck protection sleeves through an arc-shaped roll neck clamp.
Furthermore, a heat insulation device is arranged between every two adjacent electromagnetic rods.
A dynamic adjusting method for the torque of a driven working roll of a Y-shaped rolling mill comprises the following steps:
step S1: starting a rolling mill, inputting alternating current Vi to the electromagnetic induction coil, continuously providing energy for a built-in thermal power hybrid driving source of the electromagnetic control roller, and starting to roll the plate strip;
step S2: during rolling, the device is always in a starting state, firstly, the plate shape condition of the plate strip is detected through a plate shape detector, and a detection signal is fed back to a plate shape control system through a communication system;
step S3: analyzing and processing a feedback signal output by a plate shape detector through a plate shape control system to obtain plate shape data Xi, matching with an electromagnetic regulation and control roller shape, calculating the magnitude Mi of required resisting moment and the magnitude Fi of required friction force through a resisting moment regulation controller, and dynamically outputting a control signal to a proportional overflow valve through an electric control system so as to dynamically regulate the output pressure Fj of a hydraulic cylinder;
step S4: the hydraulic cylinder outputs pressure Fj to act on the power assisting device, so that the power assisting device and the roll neck protective sleeve generate friction force, the aim of applying resistance moment to the upper working roll is fulfilled, the rolling effect of the plate and strip is enhanced, and larger single-pass internal reduction is obtained under the same rolling force;
step S5: in the process of gradually eliminating the edge drop problem, the feedback signal of the plate shape detector is updated in real time, so that the magnitude of the applied torque of the device is dynamically changed, and the aim of dynamically adjusting the edge drop problem is fulfilled;
step S6: in the rolling process, after the edge drop problem of the strip is eliminated, the strip shape detector continuously detects the strip shape, and the device keeps the output torque unchanged until the edge drop problem is detected by the strip shape signal.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention has simple structure and more convenient and fast torque application mode, can greatly convert the applied force into the torque to the roll neck of the roll, and has better effect of reducing the resistance torque to the edge of a rolled piece;
2. the power assisting device is not in direct contact with the roll neck of the upper working roll, and the roll neck protective sleeve is clamped, so that the phenomenon that the rolling effect is influenced by overlarge heat generated in the relative movement process of the power assisting device and the roll neck of the upper working roll is avoided, and unnecessary damage to the roll neck of the roll is also avoided;
3. the hydraulic adjusting components are arranged in a vertically symmetrical mode, so that when pressure is applied to a roller neck, the upper and the lower rollers can be prevented from being bent and the side drop of the heavy plate belt can be prevented;
4. compared with the conventional resisting moment control, the electric control system processes and outputs a control signal according to an input plate shape signal, and adjusts the proportional overflow valve which controls the pressure of the inlet and the outlet of the hydraulic cylinder according to the input plate shape signal, so that the output pressure can be regulated and controlled, the resisting moment of the roll neck of the roll can be formed, and the stable control of the resisting moment can be realized;
5. the application of the resisting moment is equivalent to the moment diffused along the middle section of the axial roller, the closer the diffusion distance is to the central position of the roller, the smaller the moment value is, and the penetration depth can be adjusted along with the increase of the edge resisting moment, so that the invention not only can achieve the application of the resisting moment, but also can control the contact depth position of the resisting moment, and more effectively solves the edge drop problem;
6. compared with other edge drop control methods, the method has the advantages of low construction and application cost and simplicity in implementation, and can effectively regulate the edge drop of the rolled piece by combining the novel electromagnetic regulation and control of the expansion of the roller.
Drawings
FIG. 1 is a schematic view of the overall structure of an embodiment of a dynamic adjusting device for the torque of a driven work roll of a Y-type rolling mill, which is provided by the invention;
FIG. 2 is a schematic isometric side view of the upper work roll of FIG. 1 coupled to a hydraulic adjustment assembly;
FIG. 3 is a schematic cross-sectional view of the electromagnetically controlled roll shown in FIG. 1;
fig. 4 is a technical schematic of the adjustment method of the present invention.
Wherein, the reference numbers: 1-a hydraulic regulation and control component; 2-upper working roll; 3, supporting rollers; 4-electromagnetic regulation and control of the roller; 5-an electromagnetic induction coil; 6-an electronic control system; 7-an electromagnetic bar; 8-a heat insulation device; 9-roll neck protection sleeve; 10-roll neck grippers; 11-a hydraulic cylinder; 12-proportional relief valve; 13-a booster device; 14-a fixed baffle; 41-central through hole.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
It should be noted that in the description of the present invention, the terms "upper", "lower", "top", "bottom", "one side", "the other side", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not mean that a device or an element must have a specific orientation, be configured in a specific orientation, and be operated.
Referring to fig. 1 to 3, a specific structure of an embodiment of a dynamic adjusting device for the torque of a driven work roll of a Y-type rolling mill is shown. The device comprises a hydraulic regulation and control component 1, an upper working roll 2, a supporting roll 3, an electromagnetic regulation and control roll 4, an electromagnetic induction coil 5, an electric control system 6, an electromagnetic rod 7, a heat insulation device 8, a roll neck protection sleeve 9 and an arc-shaped roll neck clamper 10; the supporting rolls 3 are symmetrically arranged on the left side and the right side of the top of the upper working roll 2, the electromagnetic regulation and control rolls 4 are arranged right below the upper working roll 2, and the upper working roll 2, the supporting rolls 3 and the electromagnetic regulation and control rolls 4 are in mutual parallel line contact; the hydraulic regulating and controlling assemblies 1 are provided with four groups, and are respectively arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll 2 in a pairwise symmetry manner; in the embodiment, roll neck protection sleeves 9 are arranged outside roll necks at the front end and the rear end of the upper working roll 2, and the roll neck protection sleeves 9 are hollow annular sleeves and are used for preventing the hydraulic regulation and control assembly 1 from being directly contacted with the roll necks; the electric control system 6 is connected with the hydraulic regulation and control assembly 1; the inside of electromagnetic control roll 4 is provided with central through-hole 41, electromagnetic rod 7 evenly arranges in central through-hole 41, the quantity of electromagnetic rod 7 can be adjusted according to actual conditions, in this embodiment, the quantity of electromagnetic rod 7 sets up to five, and adjacent two all be provided with heat-proof device 8 between the electromagnetic rod 7, electromagnetic rod 7 is the cylinder stick structure, and it has the circular slot to open on the barred body for the winding electromagnetic induction coil 5, electromagnetic induction coil 5 connects to outside variable frequency power supply, adopts alternating current power supply, and the power supply produces alternating magnetic field, realizes carrying out electromagnetic induction heating to electromagnetic rod 7, constantly provides the energy for the built-in heating power hybrid source of electromagnetic control roll 4.
The hydraulic regulation and control assembly 1 comprises a hydraulic cylinder 11, a proportional overflow valve 12, a power assisting device 13 and a fixed baffle 14; the hydraulic cylinders 11 are respectively and symmetrically arranged at the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll 2, the piston rods of the hydraulic cylinders 11 are connected with the power assisting device 13, the inner end of the power assisting device 13 is in contact connection with the roll neck protecting sleeve 9 at the outer side of the roll neck of the upper working roll 2 through the arc-shaped roll neck clamp 10, and the contact area and the friction coefficient are kept unchanged; the hydraulic cylinder 11 outputs variable pressure to act on the roll neck clamp 10, the power assisting device 13 is in contact with the roll neck protecting sleeve 9, and applies pressure pointing to the axis of the roll neck to the roll neck of the upper working roll 2, so that the roll neck of the upper working roll 2 generates friction force along the tangential direction, and further the upper working roll 2 generates resistance moment; the roll neck clamp 10 is not directly contacted with the roll neck of the roll, but is directly contacted with the roll neck protective sleeve 9, so that the phenomenon that the rolling effect is influenced by overlarge heat generated in the relative movement process of the roll neck clamp 10 and the roll neck of the roll is avoided, and meanwhile, the unnecessary damage to the roll neck of the roll is avoided; the hydraulic regulating and controlling components 1 are arranged in an up-and-down symmetrical mode, and can prevent the upper and the lower rollers from bending and increasing the edge drop of the plate belt when pressure is applied to the roller neck; the resistance moment is applied in an up-down symmetrical force clamping mode, the application of the resistance moment is equivalent to a moment diffused towards the inside of the roller along the axial direction, the closer the diffusion distance is to the central position of the roller, the smaller the moment value is, namely, the influence exerted on the edge of a rolled piece is mainly aimed at, but the penetration depth can be adjusted along with the increase of the end resistance moment; the proportional overflow valve 12 is arranged on one side of the cylinder body of the hydraulic cylinder 11 and is connected with the electric control system 6, and the oil flow value of the inlet and the outlet of the hydraulic cylinder 11 is adjusted by receiving signals output by the electric control system, so that the output pressure and the resistance torque formed on the roll neck of the roll can be regulated and controlled, the stable control of the resistance torque can be realized, and the regulation and control of the resistance torque can be finally realized; the fixed baffle plates 14 are respectively and fixedly connected with the outer end parts of the cylinder bodies of the hydraulic cylinders 11.
A dynamic adjusting method for the torque of a driven working roll of a Y-shaped rolling mill comprises the following steps:
in order to further illustrate the feasibility of the device, the structural size of the electromagnetic control roller 4 adopted in the embodiment is phi 270mm multiplied by 600 mm; the electromagnetic rods 7 are uniformly arranged at the center of the central through hole 41 of the electromagnetic control roller 4 at intervals; the diameter of the electromagnetic rod is 100mm, the length of the induction heating area is 25mm, and the length of the contact area is 50 mm; the electromagnetic control roller 4 and the electromagnetic rod 7 are made of 9Cr2Mo steel.
Step S1: starting the rolling mill, and connecting the electromagnetic induction coil 5 with an alternating current 60A to continuously provide energy for a built-in thermal power hybrid driving source of the electromagnetic control roller 4 to start rolling the strip;
step S2: during rolling, the device is always in a starting state, firstly, the plate shape condition of the plate strip is detected through a plate shape detector, and a detection signal is fed back to the electric control system 6 through a communication system;
step S3: the electric control system 6 analyzes and processes a feedback signal output by the plate shape detector to obtain plate belt data Xi, the plate belt data Xi is matched with the roller shape of the electromagnetic regulation and control roller 4, the magnitude of the required resisting moment is calculated to be 30N · M and the magnitude of the required friction force is calculated to be 50N through the resisting moment regulation controller, the control signal is dynamically output to the proportional overflow valve 12 through the electric control system 6, and the output pressure of the hydraulic cylinder 11 is dynamically regulated to be 500N, wherein the resisting moment M is F × L (F is the friction force, L is the force arm), F is Fj × F (Fj is the positive pressure, and F is the friction coefficient);
step S4: the hydraulic cylinder 11 outputs pressure 500N to act on the power assisting device 13, so that the power assisting device 13 and the roll neck protecting sleeve 9 generate friction force, the aim of applying resistance moment to the upper working roll 2 is fulfilled, the rolling effect of the plate and strip is enhanced, and larger single-pass internal reduction is obtained under the same rolling force;
step S5: in the process of gradually eliminating the edge drop problem, the signal fed back by the shape gauge is updated in real time, so that the magnitude of the applied torque of the device is dynamically changed, and the aim of dynamically adjusting the edge drop problem is fulfilled;
step S6: in the rolling process, after the edge drop problem of the strip is eliminated, the strip shape detector continuously detects the strip shape, and the device keeps the output torque unchanged until the edge drop problem is detected by the strip shape signal.
The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (3)
1. The utility model provides a driven work roll moment dynamic adjustment device of Y type rolling mill which characterized in that: the device comprises a hydraulic regulation and control assembly, an upper working roll, a supporting roll, an electromagnetic regulation and control roll, an electromagnetic induction coil, an electric control system and an electromagnetic rod; the supporting rollers are symmetrically arranged on the left side and the right side of the top of the upper working roller; the electromagnetic control roller is arranged right below the upper working roller; the hydraulic regulating and controlling components are respectively and symmetrically arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll; the electric control system is connected with the hydraulic regulation and control assembly; a central through hole is formed in the electromagnetic control roller, the electromagnetic bars are uniformly arranged in the central through hole, and the electromagnetic induction coil is wound on the electromagnetic bars;
the hydraulic regulation and control assembly comprises a hydraulic cylinder, a proportional overflow valve, a power assisting device and a fixed baffle; the hydraulic cylinders are respectively and symmetrically arranged on the upper side and the lower side of the roll necks at the front end and the rear end of the upper working roll, and piston rods of the hydraulic cylinders are connected with the roll necks of the upper working roll through the power assisting devices; the proportional overflow valve is arranged on one side of the hydraulic cylinder body; the fixed baffle plates are respectively arranged at the outer end parts of the hydraulic cylinder bodies;
and the outer sides of the roll necks at the front end and the rear end of the upper working roll are provided with roll neck protective sleeves, and a piston rod of the hydraulic cylinder is connected with the roll neck protective sleeves through an arc-shaped roll neck clamp holder.
2. The dynamic adjusting device for the torque of the driven working roll of the Y-shaped rolling mill as claimed in claim 1, characterized in that: and a heat insulation device is arranged between every two adjacent electromagnetic rods.
3. A method of adjusting the dynamic adjustment of the torque of the driven work rolls of a Y-roll mill as claimed in claim 1 or 2, characterized in that it comprises the following steps:
step S1: starting a rolling mill, inputting alternating current Vi to the electromagnetic induction coil, continuously providing energy for a built-in thermal power hybrid driving source of the electromagnetic control roller, and starting to roll the plate strip;
step S2: during rolling, the adjusting device is always in a starting state, firstly, the plate shape condition of the plate strip is detected through a plate shape detector, and a detection signal is fed back to a plate shape control system through a communication system;
step S3: analyzing and processing a feedback signal output by a plate shape detector through a plate shape control system to obtain plate shape data Xi, matching with an electromagnetic regulation and control roller shape, calculating the magnitude Mi of required resisting moment and the magnitude Fi of required friction force through a resisting moment regulation controller, and dynamically outputting a control signal to a proportional overflow valve through an electric control system so as to dynamically regulate the output pressure Fj of a hydraulic cylinder;
step S4: the hydraulic cylinder outputs pressure Fj to act on the power assisting device, so that the power assisting device and the roll neck protective sleeve generate friction force, the aim of applying resistance moment to the upper working roll is fulfilled, the rolling effect of the plate and strip is enhanced, and larger single-pass internal reduction is obtained under the same rolling force;
step S5: in the process of gradually eliminating the edge drop problem, the feedback signal of the plate shape detector is updated in real time, so that the magnitude of the applied torque of the power assisting device is dynamically changed, and the aim of dynamically adjusting the edge drop problem is fulfilled;
step S6: in the rolling process, after the edge drop problem of the strip is eliminated, the strip shape detector continuously detects the strip shape, and the power assisting device keeps the output torque unchanged until the edge drop problem is detected by the strip shape signal.
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| SE8300358D0 (en) * | 1982-04-30 | 1983-01-25 | Hoesch Werke Ag | DEVICE FOR FORMAL CONTROL OF ROLLS IN METAL ROLLS |
| DE102011018874B3 (en) * | 2011-04-28 | 2012-08-30 | Saueressig Gmbh + Co. Kg | Roller arrangement with a device for regulating the nip and method for controlling the nip in a roller assembly |
| CN102581031B (en) * | 2012-01-18 | 2015-01-07 | 燕山大学 | Inner-source driven comprehensive shape and thickness regulation mill |
| CN106391700B (en) * | 2016-08-31 | 2018-02-09 | 燕山大学 | A kind of lower drive-type Y types four-roller strip-mill strip |
| CN108372204B (en) * | 2018-03-01 | 2019-08-23 | 燕山大学 | A kind of flexible roll crown regulation roll of segmentation |
| CN110508627B (en) * | 2019-08-27 | 2020-07-03 | 燕山大学 | Comprehensive test platform and test method for regulating and controlling capability of electromagnetic regulating and controlling roller |
| CN112024612A (en) * | 2020-09-02 | 2020-12-04 | 中冶赛迪工程技术股份有限公司 | Aluminum strip casting and rolling hydraulic casting and rolling control equipment and method |
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