CN110586661A - Gapless rolling control method - Google Patents
Gapless rolling control method Download PDFInfo
- Publication number
- CN110586661A CN110586661A CN201910735283.7A CN201910735283A CN110586661A CN 110586661 A CN110586661 A CN 110586661A CN 201910735283 A CN201910735283 A CN 201910735283A CN 110586661 A CN110586661 A CN 110586661A
- Authority
- CN
- China
- Prior art keywords
- roughing mill
- rolling
- billet
- speed
- current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Metal Rolling (AREA)
Abstract
The embodiment of the invention provides a gapless rolling control method, which comprises the following steps: arranging a hot metal detector in front of an inlet of a first roughing mill of a roughing mill group; monitoring the tail position of the current steel billet in the first rough rolling mill by the hot metal detector; monitoring, by the hot metal detector, whether a head of a next billet is located between the hot metal detector and the first roughing mill; when the head of the next steel billet is positioned between the hot metal detector and the first roughing mill and the tail of the current steel billet is positioned in front of the center of the first roughing mill, reducing the rolling speed v of the first roughing mill0The tail part of the current steel billet and the head part of the next steel billet can be meshed in a head-to-tail mode in the first rough mill of the rough mill set, and the distance between the second rough mill and the first rough mill can be increased between the current rolled steel billet and the next steel billet, so that smooth hot rolling operation is guaranteed, and the time yield of a wire rolling mill can be improved.
Description
Technical Field
The invention relates to rolling of steel bar and wire sectional materials, in particular to a gapless rolling control method.
Background
In the process of rolling steel, the rolling speed is usually controlled by the automatic tapping speed of the heating furnace, namely the steel is automatically fed into a roughing mill for roughing after tapping of the heating furnace, and the speed between each step is not manually controlled. However, since the friction coefficient is not uniform due to the difference in the step pitch between the billets in the heating furnace per shift, the non-rotation of the individual ground rolls in front of the roughing mill and the non-uniform slip of the wear height, and the speed of the billet coming out of the heating furnace into the roughing mill is affected, the automatic tapping of the heating furnace is generally changed to the manual tapping mode.
In the process of implementing the invention, the applicant finds that at least the following problems exist in the prior art:
in the manual steel tapping mode, sometimes, because an operator has inaccurate judgment on the distance between two steel billets entering a roughing mill set, when the distance between the next steel billet and the previous steel billet is too close, the two steel billets have rear-end collision accidents. At this time, if found timely, the crushing treatment can be carried out by using a No. 1 flying shear after the roughing mill group. If the situation that the two steel billets which are subjected to rear-end collision cannot be distinguished by an automatic program for controlling the No. 1 flying shears is not timely found, the No. 1 flying shears positioned behind the roughing mill set cannot perform normal head cutting and breaking treatment, so that the steel billets stay at the inlet of the intermediate mill set, billet stacking accidents occur, and normal production is influenced.
Disclosure of Invention
The embodiment of the invention provides a gapless rolling control method, which comprises the steps of monitoring the tail position of the current steel billet and the head position of the next steel billet in a first rough rolling mill by a hot metal detector, and judging whether the head of the steel billet bitten in the first rough rolling mill is positioned in the hot metal detector and the first rough rolling mill or not when the head of the next steel billet is positioned in the hot metal detectorReducing the rolling speed v of the first roughing mill between mills0The tail part of the current steel billet and the head part of the next steel billet can be simultaneously connected and bitten into the first roughing mill, and the distance is increased between the second roughing mill of the roughing mill group and the first roughing mill, so that the head part of the next steel billet cannot collide with the tail part of the current steel billet, and the smooth hot rolling operation is ensured.
To achieve the above object, an embodiment of the present invention provides a gapless rolling control method, including:
arranging a hot metal detector in front of an inlet of a first roughing mill of a roughing mill group;
providing a tail falling edge signal and a PLC program tail tracking algorithm through the hot metal detector, and monitoring the tail position of the current steel billet in the first rough rolling mill;
monitoring, by the hot metal detector, whether a head of a next billet is located between the hot metal detector and the first roughing mill;
reducing the rolling speed v of the first roughing mill when the head of the next billet is positioned between the hot metal detector and the first roughing mill0The tail part of the current billet and the head part of the next billet are meshed in a head-to-tail connection mode in a first roughing mill of a roughing mill group, the distance between the current rolled billet and the next billet in a second roughing mill and the first roughing mill can be increased, and the current rolling interval delta t of the second roughing mill is not smaller than the minimum set rolling interval t0。
Preferably, when the head of the next billet is located between the hot metal detector and the first roughing mill, the rolling speed v of the first roughing mill is adjusted0The method comprises the following steps:
setting a constant first acceleration by a proportional-integral-derivative controller PID, setting a rolling speed v of the first roughing mill0Adjusted to a first speed v1Said first speed v1Less than said rolling speed v0；
Maintaining said first speed v1And (4) running at a constant speed.
Preferably, while maintaining the first speed v1When the uniform velocity operation, still include:
raising said first speed v when the head of said next billet has not yet engaged the second roughing mill1Rolling speed v to the first roughing mill0。
Preferably, said first speed v is raised1Rolling speed v to the first roughing mill0The method comprises the following steps:
setting a constant second acceleration by a proportional-integral-derivative controller PID1Is raised to the rolling speed v of the first roughing mill0。
Preferably, the method further comprises the following steps: when the current rolling interval delta t is smaller than the set minimum rolling interval t of the second roughing mill0Then the second acceleration is increased.
Preferably, the hot metal detector is provided before the entrance of the first roughing mill of the roughing train and comprises:
the ratio of the distance from the hot metal detector to the inlet of the first roughing mill to the length of the steel billet is not less than 0.9 and less than 1.
Preferably, monitoring the position of the tail of the current steel billet located in the first roughing mill by the hot metal detector comprises:
and comparing the falling edge signal of the tail position of the current steel billet with the tail position obtained by calculating according to the actual rolling speed of the first roughing mill, the forward slip factor and the backward slip factor, and dynamically tracking the tail position of the current steel billet in real time by a Programmable Logic Controller (PLC) after the hot metal detector detects the tail of the current steel billet.
Preferably, the method further comprises the following steps:
recording a first time t for the head of the current steel billet to bite into the second roughing mill1；
Recording a second time t for the head of the next billet to bite into the second roughing mill2；
Passing through the first time t1And said second time t1And calculating the difference to obtain the current rolling interval delta t.
The technical scheme has the following beneficial effects: a hot metal detector is arranged behind the heating furnace and in front of the first roughing mill of the roughing mill group, namely the hot metal detector is arranged in front of an inlet of the first roughing mill of the roughing mill group, and the position of the steel billet coming out of the heating furnace can be detected. Specifically, the tail position of the current steel billet in the first roughing mill is monitored through the hot metal detector and a PLC (programmable logic controller) program tail tracking algorithm, when the hot metal detector detects the tail position of the steel billet, a signal is sent to the PLC, and the PLC automatically calculates the tail position change of the current steel billet and tracks the tail position of the current steel billet according to the actual rolling speed of the first roughing mill and the rolling elongation of a steel billet material. And monitoring the head position of the next billet by the hot metal detector, namely detecting whether the head of the next billet is positioned between the hot metal detector and the first roughing mill, and certainly not biting into the second roughing mill. When the head of the next billet is located between the hot metal detector and the first roughing mill (at this time, the PLC may generate a head rising edge signal of the next billet), and the first roughing mill contains steel, specifically, when the tail of the current billet is located before the center of the first roughing mill, that is, between the hot metal detector and the center of the first roughing mill, the PLC may generate a first roughing mill deceleration signal (that is, the rolling speed v of the first roughing mill is reduced)0) At this time, the first roughing mill starts to reduce the speed according to a certain slope, and then the next billet and the current billet are in a head-to-tail connection state in the first roughing mill (namely, the distance between the head of the next billet and the tail of the current billet is 0), so that the head-to-tail connection and biting of the tail of the current billet and the head of the next billet in the first roughing mill of the roughing mill group are realized, the distance between the second roughing mill and the first roughing mill can be drawn between the currently rolled billet and the next billet, and the current rolling interval delta t of the second roughing mill is ensured to be not less than the minimum set rolling interval t0. Minimum rolling interval t0For ensuring whenThe rolling interval between the previous billet and the next billet in the second rough rolling mill is controllable, so the minimum rolling interval time of the second rough rolling mill can be set artificially. After the distance between the tail of the current steel billet and the head of the next steel billet is pulled between the second roughing mill of the roughing mill group and the first roughing mill, the head of the next steel billet cannot collide with the tail of the current steel billet, so that the smooth hot rolling operation is ensured. Compared with a manual steel tapping mode, the steel billet automatic tapping device has the advantages that rear-end collision and billet stacking accidents are avoided, the safety production index is improved, the rolling interval is reduced by reasonably controlling the current rolling interval delta t, the production capacity is increased, the productivity is improved, and the yield is increased, namely the benefit is improved. The mental stress of workers is avoided, and the labor intensity of the workers is reduced.
Drawings
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 described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a gapless rolling control method according to an embodiment of the present invention;
FIG. 2 is a layout diagram of a gapless rolling line according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to FIGS. 1-2, in accordance with an embodiment of the present invention, a gapless rolling control method is provided for use in bar and wire section plant heatThe invention relates to a rolling production line, which comprises a heating furnace, a rough rolling unit, a middle rolling unit, a finishing rolling unit and the like, wherein the gapless rolling control method specifically comprises the following steps: a hot metal detector is arranged behind the heating furnace and in front of the first roughing mill of the roughing mill group, namely the hot metal detector is arranged in front of an inlet of the first roughing mill of the roughing mill group, and the position of the steel billet coming out of the heating furnace can be detected. Specifically, after the tail position of the current steel billet in the first roughing mill is monitored through the hot metal detector and a PLC (programmable logic controller) program tail tracking algorithm, a tail position signal of the current steel billet is sent to a PLC, and the PLC automatically calculates the tail position change of the current steel billet and tracks the tail position of the current steel billet according to the actual rolling speed of the first roughing mill and the rolling elongation of a steel billet material. The PLC program tail tracking algorithm is a control idea, and the distance tracking between the tail of the current steel billet and the center of the first roughing mill is realized through the PLC program. And monitoring the head position of the next billet by the hot metal detector, namely detecting whether the head of the next billet is positioned between the hot metal detector and the first roughing mill, and certainly not biting into the second roughing mill. When the head of the next billet is located between the hot metal detector and the first roughing mill (at this time, the PLC may generate a head rising edge signal of the next billet), and the first roughing mill contains steel, specifically, when the tail of the current billet is located before the center of the first roughing mill, that is, between the hot metal detector and the center of the first roughing mill, the PLC may generate a first roughing mill deceleration signal, at this time, the first roughing mill starts to decelerate at a certain slope, and then the next billet and the current billet are in a head-to-tail connection state in the first roughing mill (that is, the distance between the head of the next billet and the tail of the current billet is 0), that is, gapless rolling is realized, and at this time, the rolling speed v of the first roughing mill is reduced0So that the tail part of the current steel billet and the head part of the next steel billet are engaged in a head-to-tail connection mode in a first rough rolling mill of the rough rolling mill group, and the current rolled steel billet and the next steel billet are engaged in a second rough rolling mill and the first rough rolling millThe distance between the machines can be opened, and the current rolling interval delta t of the second rough rolling mill is not less than the minimum set rolling interval t0. Minimum rolling interval t0The method is used for ensuring that the rolling interval between the current billet and the next billet entering the second rough rolling mill is controllable, so that the minimum rolling interval time of the second rough rolling mill can be set artificially. After the distance between the tail of the current steel billet and the head of the next steel billet is pulled between the second roughing mill of the roughing mill group and the first roughing mill, the head of the next steel billet cannot collide with the tail of the current steel billet, so that the smooth hot rolling operation is ensured. Compared with a manual steel tapping mode, the steel billet automatic tapping device has the advantages that rear-end collision and billet stacking accidents are avoided, the safety production index is improved, the rolling interval is reduced by reasonably controlling the current rolling interval delta t, the production capacity is increased, the productivity is improved, and the yield is increased, namely the benefit is improved. The mental stress of workers is avoided, and the labor intensity of the workers is reduced.
The index statistics table for producing deformed steel bar with 18mm diameter by one bar (first bar production line) shown in table 1 is used for counting indexes before and after the gapless rolling control method is adopted for 9 production lines of a bar and wire section bar extraction plant.
TABLE 1 one-rod 18-snail index statistical table
In the statistical data of each index in table 1, the non-interval rolling control method of the present invention is not adopted for month 1 to 9, and the non-interval rolling control method of the present invention is adopted for month 10, so that it can be seen that the indexes such as yield and the like are obviously improved.
By the method, the distance between the tail of the current steel billet and the head of the next steel billet is controlled when the finishing mill group rolls, the situation that the loop roller is not completely sleeved in the process of sleeving the current steel billet by the loop between frames of the finishing mill and the tail of the current steel billet is mounted at the head of the next steel billet is avoided, and steel stacking and steel flying accidents are avoided.
Preferably, as shown in fig. 1, in the gapless rolling control method of the present invention, when the head of the next billet is located between the hot metal detector and the first roughing mill and the tail of the current billet is located before the center of the first roughing mill, the rolling speed v of the first roughing mill is adjusted0The method specifically comprises the following steps: a constant first acceleration, i.e. the rolling speed v of the first roughing train, is set by a proportional-integral-derivative controller PID0And (3) decelerating in a stable slope mode according to the set first acceleration and a set time period (according to specific conditions, the time range is 0.02-0.1S). The PID controller can calculate the first acceleration by utilizing proportion, integral and differential according to the error of the hot metal detector and a PLC program tail tracking algorithm, thereby smoothly finishing the speed reduction. The constant acceleration is adopted, so that the adjustment is convenient, the first roughing mill is protected, and meanwhile, the rolling quality of the current steel billet can be ensured. The rolling speed v of the first roughing mill after speed reduction0At a first speed v1The first speed v can be known1Less than said rolling speed v0Then the rolling speed of the first roughing mill for rolling the next billet is reduced and the first speed v is maintained1And running at a constant speed for a period of time. The rolling time of the next billet in the first roughing mill is extended, i.e. the time for the next billet to be tapped from the first roughing mill is delayed, so that the head of the next billet is kept a safe distance from the tail of the current billet between the first roughing mill and the second roughing mill, thereby avoiding rear-end collisions.
Preferably, as shown in FIG. 1, the rolling speed v of the first roughing mill is adjusted0At the first speed v1After a period of constant speed operation (i.e. low speed operation) (specifically, 6 to 8 seconds), the current billet leaves the first roughing mill, and the next billet is not yet engaged into the second roughing mill. Then after said current billet bites into the second roughing mill, raising said first speed v1Rolling speed v to the first roughing mill0Also, the first roughing mill is returned to normal rolling speed, avoiding the next oneAnd under the condition that the steel billet and the current steel billet collide with each other, the next steel billet is ensured to be normally rolled, so that the rolling efficiency is improved.
Preferably, as shown in fig. 1, the first speed v is raised1Rolling speed v to the first roughing mill0The method comprises the following steps: setting a constant second acceleration, i.e. setting said first speed v, by means of a proportional-integral-derivative controller PID1And accelerating to a normal rolling speed in a stable slope mode according to the set second acceleration and time (according to specific conditions, the time range is 0.02-0.1S), and adopting the constant acceleration to facilitate adjustment, protect the first roughing mill and ensure the rolling quality of the next billet. The PID controller can calculate a second acceleration by utilizing proportion, integral and differential according to the error of the hot metal detector and a PLC program tail tracking algorithm, so that the acceleration is smoothly finished. Finally, the first speed v is adjusted1Is raised to the rolling speed v of the first roughing mill0Meanwhile, the next steel billet is ensured to be normally rolled, so that the rolling efficiency is improved. After the first roughing mill is subjected to speed adjustment in three stages of speed reduction, low-speed operation and speed increase, the head of the next billet and the tail of the current billet are separated by a certain distance between the first roughing mill and the second roughing mill.
Preferably, as shown in fig. 1, the gapless rolling control method of the present invention further comprises: when the current rolling interval delta t is smaller than the minimum rolling interval t0The time interval between two steel-containing signals passing through the second roughing mill and the minimum rolling interval t0And comparing, and increasing the second acceleration to finely adjust the rising speed ratio of the first roughing mill.
Understandably, if the current rolling interval Δ t of the second roughing mill during which the current billet and the next billet bite into the second roughing mill is relatively small, i.e., the time interval of the second roughing mill during which the next billet and the current billet bite into the second roughing mill is long, the first speed v of the first roughing mill can be rapidly increased1Rolling speed v to the first roughing mill0To thereby liftThe rolling efficiency of the first roughing mill is improved, the speed-up speed of the functions of the head, the top and the tail of the two billets of the next first roughing mill is influenced after the speed-up ratio is adjusted (in an ideal limit state, the distance between the head of the next billet and the tail of the previous billet is 0), and therefore the billets can be rapidly provided for the second roughing mill, and the integral rolling speed and efficiency are provided.
That is, the gapless rolling control method can minimize the maximum head-to-head and tail rolling distance of the two billets at the inlet of the first roughing mill of the roughing mill group; meanwhile, the rolling speed of the first roughing mill is reduced through reasonable speed reduction time to pull the rolling distance between the tail of the current steel billet and the next steel billet, so that the current steel billet and the next steel billet are kept at a reasonable distance in the second roughing mill, and the rear-end collision phenomenon is avoided. After the tail of the current steel billet is separated from the first roughing mill, the first roughing mill recovers the rolling speed, and the 1# flying shear is prevented from being adopted for breaking treatment after the steel billet collides with the tail, so that the accident that the 1# flying shear cannot normally cut the head or the steel billet collides with a loop roller can be avoided.
As shown in tables 2 and 3, statistics of various indexes before and after the gapless rolling control method of the present invention was used in a bar and wire section mill were recorded.
TABLE 2 gapless Rolling control method without the use of the present invention
TABLE 3 data after applying the gapless rolling control method of the present invention
It can be seen that in the process of rolling one bar, the rolling interval of the gapless rolling control method is obviously reduced, namely the actual rolling interval time is reduced to the maximum extent, the minimum rolling interval control is realized, and compared with the conditions that the rhythm of each steel bar in a manual tapping mode is inconsistent and the rolling rhythm is fast and slow, the rolling interval control method provided by the invention has the advantages that the rhythm is relatively stable, uniform and fast, the time utilization rate is high, the machine-hour yield of each shift is high, and the hourly yield of a production line is improved.
Preferably, the gapless rolling control method of the present invention, wherein the hot metal detector is provided before an entrance of a first roughing mill of the roughing mill train, comprises: the ratio of the distance from the hot metal detector to the inlet of the first roughing mill to the length of the steel billet is not less than 0.9 and less than 1, and the hot metal detector is used for effectively detecting a tail signal of the steel billet. Understandably, the bar and wire section mill will be equipped with a heating furnace for heating and rolling billets, wherein the heated and rolled billet has a specification of 165x165x10000mm, wherein the billet has a length of 10m, so that a hot metal detector (HMD0) can be arranged 9.5 meters before the entrance of the first roughing mill, and the ratio of the distance between the hot metal detector and the entrance of the first roughing mill to the length of the billet is 0.95 as can be found by calculation if 9.5m/10m is 0.95. When the ratio of the distance from the hot metal detector to the inlet of the first roughing mill to the length of the billet is 0.95, the head and the tail of the next billet can be detected to be generated shortly after the next billet comes out of the heating furnace, so that the fault-tolerant probability of the head of the next billet being detected mistakenly or missed is improved.
Preferably, the gapless rolling control method of the present invention, monitoring the tail position of the current billet in the first roughing mill by the hot metal detector, includes: and comparing the falling edge signal of the tail position of the current steel billet with the tail position obtained by calculating according to the actual rolling speed of the first roughing mill, the forward slip factor and the backward slip factor so that the tail position of the current steel billet can be dynamically and accurately monitored by a PLC (programmable logic controller) program tail tracking algorithm after the hot metal detector detects the tail of the current steel billet.
Preferably, the gapless rolling control method of the present invention further includes: recording a first time t for the head of the current steel billet to bite into the second roughing mill1(ii) a Recording a second time t for the head of the next billet to bite into the second roughing mill2(ii) a Passing through the first time t1And said second time t1The difference value of (A) is calculated to obtain the current rolling interval delta t, that isThe time interval of two adjacent steel-containing signals of the second roughing mill is used, and the time interval of the two adjacent steel-containing signals is used for improving reference for whether to adjust the rolling speed of the first roughing mill, so that the normal rolling speed is realized when the first roughing mill rolls a subsequent billet while the distance between the tail of the current billet and the head of the next billet is ensured, and the generation efficiency is improved.
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.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. To those skilled in the art; various modifications to these embodiments will be readily apparent, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure 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.
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".
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. A gapless rolling control method, comprising:
arranging a hot metal detector in front of an inlet of a first roughing mill of a roughing mill group;
monitoring the tail position of the current steel billet in the first rough rolling mill by the hot metal detector;
monitoring, by the hot metal detector, whether a head of a next billet is located between the hot metal detector and the first roughing mill;
when the head of the next steel billet is positioned between the hot metal detector and the first roughing mill, reducing the rolling speed v of the first roughing mill0The tail part of the current billet and the head part of the next billet are meshed in a head-to-tail mode in a first roughing mill of the roughing mill group, the distance between the second roughing mill and the first roughing mill can be increased between the current rolled billet and the next billet, and the current rolling interval delta t of the second roughing mill is not smaller than the maximum valueSmall set rolling interval t0。
2. The gapless rolling control method according to claim 1, wherein a rolling speed v of the first roughing mill is adjusted when the head of the next slab is located between the hot metal detector and the first roughing mill0The method comprises the following steps:
setting a constant first acceleration by a proportional-integral-derivative controller PID, setting a rolling speed v of the first roughing mill0Adjusted to a first speed v1Said first speed v1Less than said rolling speed v0；
Maintaining said first speed v1And (4) running at a constant speed.
3. The gapless rolling control method according to claim 2, wherein the first speed v is maintained1When the uniform velocity operation, still include:
raising the first speed v when the head of the next billet has left the first roughing mill but has not yet engaged the second roughing mill1Rolling speed v to the first roughing mill0。
4. The gapless rolling control method according to claim 3, wherein the first speed v is raised1Rolling speed v to the first roughing mill0The method comprises the following steps:
setting a constant second acceleration by a proportional-integral-derivative controller PID1Is raised to the rolling speed v of the first roughing mill0。
5. The gapless rolling control method according to claim 4, further comprising:
when the current rolling interval delta t is smaller than the set minimum rolling interval t of the second roughing mill0Then the second acceleration is increased.
6. The gapless rolling control method according to claim 1, wherein the step of locating the hot metal detector 9.5m before the entrance of the first roughing mill of the roughing mill train comprises:
the ratio of the distance from the hot metal detector to the inlet of the first roughing mill to the length of the steel billet is not less than 0.9 and less than 1.
7. The gapless rolling control method of claim 1, wherein monitoring a position of an end of a current billet located within the first roughing mill by the hot metal detector comprises:
and comparing the falling edge signal of the tail position of the current steel billet with the tail position obtained by calculating according to the actual rolling speed of the first roughing mill, the forward slip factor and the backward slip factor, and dynamically tracking the tail position of the current steel billet in real time by a Programmable Logic Controller (PLC) after the hot metal detector detects the tail of the current steel billet.
8. The gapless rolling control method according to claim 1, further comprising:
recording a first time t for the head of the current steel billet to bite into the second roughing mill1；
Recording a second time t for the head of the next billet to bite into the second roughing mill2；
Passing through the first time t1And said second time t1And calculating the difference to obtain the current rolling interval delta t.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735283.7A CN110586661B (en) | 2019-08-09 | 2019-08-09 | Gapless rolling control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910735283.7A CN110586661B (en) | 2019-08-09 | 2019-08-09 | Gapless rolling control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110586661A true CN110586661A (en) | 2019-12-20 |
| CN110586661B CN110586661B (en) | 2020-12-18 |
Family
ID=68853813
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910735283.7A Active CN110586661B (en) | 2019-08-09 | 2019-08-09 | Gapless rolling control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110586661B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774421A (en) * | 2020-06-22 | 2020-10-16 | 江苏永钢集团有限公司 | Rod and wire rod rough rolling head rear-end collision feeding control method |
| CN112058915A (en) * | 2020-09-25 | 2020-12-11 | 张家港宏昌钢板有限公司 | Method for controlling production rhythm of rolling mill |
| CN112453066A (en) * | 2020-10-27 | 2021-03-09 | 中天钢铁集团有限公司 | Control method for stably controlling steel passing interval of high-speed wire steel rolling |
| CN113649412A (en) * | 2021-07-19 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Hot rolling wire binding control method and device |
| CN113751508A (en) * | 2021-08-06 | 2021-12-07 | 阳春新钢铁有限责任公司 | Ultra-long collision avoidance control method for double-high-line-row three-roller table |
| CN113996654A (en) * | 2020-07-28 | 2022-02-01 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN114293196A (en) * | 2021-12-31 | 2022-04-08 | 吉林龙翔新型材料有限公司 | Control method and system for semi-continuous production of push-pull type acid pickling tank |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001321815A (en) * | 2000-05-10 | 2001-11-20 | Nippon Steel Corp | Method for controlling conveying speed of succeeding rough bar |
| CN1654137A (en) * | 2004-02-12 | 2005-08-17 | 鞍钢集团新钢铁有限责任公司 | Method of parallel rolling by two roughing mills in the rough roll zone on hot rolling production line |
| CN101701287A (en) * | 2009-10-28 | 2010-05-05 | 南京钢铁股份有限公司 | Method for controlling automatic equidistant steel tapping of heating furnace |
| CN101722194A (en) * | 2009-11-05 | 2010-06-09 | 南京钢铁股份有限公司 | Gapless rolling process for single-strand steckel mill |
| CN103372572A (en) * | 2012-04-28 | 2013-10-30 | 宝山钢铁股份有限公司 | Control method for improving rolling pace of roughing mill |
| CN105710135A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Free rolling control method for two rough rolling mills |
| CN105834224A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision |
| CN106424159A (en) * | 2016-11-18 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method for improving rough rolling rhythm of strip steel |
-
2019
- 2019-08-09 CN CN201910735283.7A patent/CN110586661B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001321815A (en) * | 2000-05-10 | 2001-11-20 | Nippon Steel Corp | Method for controlling conveying speed of succeeding rough bar |
| CN1654137A (en) * | 2004-02-12 | 2005-08-17 | 鞍钢集团新钢铁有限责任公司 | Method of parallel rolling by two roughing mills in the rough roll zone on hot rolling production line |
| CN101701287A (en) * | 2009-10-28 | 2010-05-05 | 南京钢铁股份有限公司 | Method for controlling automatic equidistant steel tapping of heating furnace |
| CN101722194A (en) * | 2009-11-05 | 2010-06-09 | 南京钢铁股份有限公司 | Gapless rolling process for single-strand steckel mill |
| CN103372572A (en) * | 2012-04-28 | 2013-10-30 | 宝山钢铁股份有限公司 | Control method for improving rolling pace of roughing mill |
| CN105710135A (en) * | 2014-12-01 | 2016-06-29 | 鞍钢股份有限公司 | Free rolling control method for two rough rolling mills |
| CN105834224A (en) * | 2015-01-12 | 2016-08-10 | 宝山钢铁股份有限公司 | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision |
| CN106424159A (en) * | 2016-11-18 | 2017-02-22 | 首钢京唐钢铁联合有限责任公司 | Method for improving rough rolling rhythm of strip steel |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111774421A (en) * | 2020-06-22 | 2020-10-16 | 江苏永钢集团有限公司 | Rod and wire rod rough rolling head rear-end collision feeding control method |
| CN113996654A (en) * | 2020-07-28 | 2022-02-01 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN113996654B (en) * | 2020-07-28 | 2024-03-08 | 宝山钢铁股份有限公司 | Operation control method of roughing mill |
| CN112058915A (en) * | 2020-09-25 | 2020-12-11 | 张家港宏昌钢板有限公司 | Method for controlling production rhythm of rolling mill |
| CN112453066A (en) * | 2020-10-27 | 2021-03-09 | 中天钢铁集团有限公司 | Control method for stably controlling steel passing interval of high-speed wire steel rolling |
| CN112453066B (en) * | 2020-10-27 | 2022-07-29 | 中天钢铁集团有限公司 | Control method for stably controlling steel passing interval of high-speed wire steel rolling |
| CN113649412A (en) * | 2021-07-19 | 2021-11-16 | 首钢京唐钢铁联合有限责任公司 | Hot rolling wire binding control method and device |
| CN113751508A (en) * | 2021-08-06 | 2021-12-07 | 阳春新钢铁有限责任公司 | Ultra-long collision avoidance control method for double-high-line-row three-roller table |
| CN113751508B (en) * | 2021-08-06 | 2023-05-26 | 阳春新钢铁有限责任公司 | Double-high-line three-roller-way overlength collision avoidance control method |
| CN114293196A (en) * | 2021-12-31 | 2022-04-08 | 吉林龙翔新型材料有限公司 | Control method and system for semi-continuous production of push-pull type acid pickling tank |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110586661B (en) | 2020-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110586661B (en) | Gapless rolling control method | |
| CN104550237B (en) | For producing the continuous casting-Direct Rolling device and method of Bar Wire Product and section bar | |
| US5307864A (en) | Method and system for continuously producing flat steel product by the continuous casting method | |
| CN110280602A (en) | Intelligent steel rolling rolling assessment system and processing method extremely | |
| CN103878178B (en) | CSP produces the method for ultrathin hot rolled coiled sheet | |
| CN109590336B (en) | Control system and method for steel billet spacing | |
| CN109590335B (en) | Control system and method for preventing steel billet from heading and tailing | |
| CN105834224A (en) | Method for preventing cool roller bed of hot rolling layer from steel rear-end collision | |
| CN110052495A (en) | A kind of long material endless rolling production line of short route and its milling method | |
| US10384248B2 (en) | Aluminum hot strip rolling train and method for hot rolling an aluminum hot strip | |
| CN110280598B (en) | Intelligent steel rolling intelligent loop pulling control method | |
| CN108655185B (en) | Method for preventing steel jamming of single-stand rolling mill | |
| CN105080967A (en) | Secondary rolling method of broken belt roll of single-rack reversible cold rolling mill | |
| CN112692058A (en) | Rolling process for controlling thickness stability of non-oriented silicon steel | |
| CN113070339A (en) | High-speed wire production system and method with reducing and sizing unit | |
| US4430874A (en) | Vertical coiler furnace and method of rolling | |
| CN213162449U (en) | Large and medium-sized bar production system | |
| CN109590337B (en) | Control system and method for preventing steel scrap | |
| CN112453066B (en) | Control method for stably controlling steel passing interval of high-speed wire steel rolling | |
| CN214767785U (en) | High-speed wire rod production system who is furnished with reducing sizing mill group | |
| JP2013163189A (en) | Control device of hot rolling line | |
| CN111346924B (en) | Anti-pressing steel control method and device and strip steel finish rolling equipment | |
| CN103042041A (en) | Controlling method for reducing hot rolled strip steel drifting | |
| CN114515762B (en) | Method for controlling tail size of high-speed wire rod round steel | |
| CN204338571U (en) | For the production of the continuous casting-Direct Rolling device of Bar Wire Product and section bar |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220817 Address after: 545002, 117 North Bird Road, the Guangxi Zhuang Autonomous Region, Liuzhou Patentee after: Liuzhou Iron&Steel Co.,Ltd. Patentee after: GUANGXI LIUZHOU IRON AND STEEL GROUP Co.,Ltd. Address before: 545002, 117 North Bird Road, the Guangxi Zhuang Autonomous Region, Liuzhou Patentee before: Liuzhou Iron&Steel Co.,Ltd. |