CN113083899A - Novel bar multiple-length sectional control method - Google Patents
Novel bar multiple-length sectional control method Download PDFInfo
- Publication number
- CN113083899A CN113083899A CN202110256702.6A CN202110256702A CN113083899A CN 113083899 A CN113083899 A CN 113083899A CN 202110256702 A CN202110256702 A CN 202110256702A CN 113083899 A CN113083899 A CN 113083899A
- Authority
- CN
- China
- Prior art keywords
- length
- bar
- rolling mill
- shearing
- rod
- 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
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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
Abstract
The invention relates to a novel bar multiple length sectional control method, which comprises the steps of setting a first set multiple length, calculating the total length of a bar passing through a finish rolling area, calculating the number of cut bars and the length of the remaining cut bars under the condition of the first set multiple length, comparing the length of the remaining bars with the first set multiple length, and adjusting the first set multiple length to be a second set multiple length when the length of the remaining bars is smaller than the first set multiple length. And then, on the basis of the second set multiple length, the length of the residual rod material after shearing is estimated, the estimated length of the residual rod material is compared with the second set multiple length, and the actual multiple length during shearing is determined. The invention reduces the short length after shearing, effectively improves the yield of the bar, and reduces production accidents so as to improve the operating efficiency.
Description
Technical Field
The invention relates to the technical field of steel rolling control, in particular to a novel bar multiple length sectional control method.
Background
The double-length flying shear is a key device widely applied to a bar production line, a traditional double-length control method of a bar generally adopts the steps that after a rolled piece passes through a finished product rack, a pulse encoder is used for detecting the rotating speed of a motor of a finished product rolling mill and the roll diameter of a preset finished product rolling roll, the pulse equivalent of the motor encoder of the finished product rack is calculated according to the detection result, the pulse number required by the length of the set hot double-length of the rolled piece is converted to be used as a comparison value, then the pulse numbers of the length of the finished product rolled piece passing through the center line of a hot double-length cutting edge are accumulated and compared through a PLC high-speed counter module, and a shearing signal is sent immediately to control the flying shear action after the pulse number is equal to the comparison value. However, the hot metal detector before the finished product rolling mill exit speed and the multiple length shearing is adopted to shear according to the multiple length of the fixed length by calculating the length, and due to factors such as unstable length of the supplied continuous casting billet and the like, the short tail is often sheared by the last multiple length, namely only a few meters or more than ten meters, and a buffer section or a steel piling accident caused by remaining in the apron board often occurs; meanwhile, due to the fact that the roll diameter measurement has a wear defect, the influence of relative sliding of the same rolled piece on the same finished product rack and the influence of groove wear on the linear speed of a finished product and other factors cannot be well processed, so that the shearing control method has large errors, the phenomenon that the set length is inconsistent with the actual length of a cooling bed frequently occurs in the production process, the phenomenon that the length of the finished product of the cooling bed is short in time, even the length is not changed after the multiple length is corrected and the like also occurs, the yield of the product is seriously restricted, the production cost is increased, the workload of selecting the full-length materials and the short-length materials caused by the large multiple length errors is increased, and the heavy labor intensity is increased for operators.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a novel bar multiple length sectional control method, which reduces the short length after shearing, effectively improves the yield of bars, and reduces production accidents so as to improve the operating efficiency.
The technical purpose of the invention is realized by the following technical scheme:
a novel bar multiple length sectional control method comprises the steps of setting a first set multiple length, calculating the total length of a bar passing through a finish rolling area, calculating the number of cut bars and the length of the residual bar after cutting under the condition of the first set multiple length, comparing the length of the residual bar with the first set multiple length, and adjusting the first set multiple length when the length of the residual bar is smaller than the first set multiple length.
In one embodiment, the method of calculating the total length of the bar after it has passed through the finishing section is as follows:
the second rolling mill with the number of inversions in the finish rolling area is H1Rolling mill, the last rolling mill in the finish rolling area is H2Rolling mill, through H1Volume V of bar material of rolling millH1＝T1×V1×M1Wherein, T1Is the time for the entire bar to pass completely through the H1 rolling mill, V1Is H1Speed of the rolling mill, M1Is H1The pass area of the rolling mill is constant in the volume of the bar during finish rolling, so that the bar passes through H2Length after rolling, i.e. total length L ═ V after finish rolling of the barsH1/M2Wherein M is2Is H2Pass area of the mill. The method can simply and quickly calculate the total length of the bar after finish rolling, and calculate the shearing times and the length of the residual bar after shearing according to the total length of the bar and the first set multiple length.
In one embodiment, a first hot metal detector is arranged in front of the finishing area, a second hot metal detector is arranged behind the finishing area, and the second hot metal detector is positioned in front of the double-length flying shear when the bar is rolledWhen the tail end passes through the first hot metal detector, the bar is divided into the uncut length L before the multi-length flying shear1And length L of completed cut3The first set multiple length is L2Wherein the length L of the bar subjected to shearing3Is integral multiple of the first set multiple length, and passes through the total length L after the bar material is finish rolled and the first set multiple length L2Calculating the shearing times n and the length L of the residual bar4；
If the length L of the remaining rod is L4Is less than the first set multiple length L2Adjusting the first set multiple length to be a second set multiple length L'2＝L2+L4/n。
In one of the embodiments, a second set multiple length L 'is used'2The bar may remain after shearing, and the length L 'of the bar expected to remain after shearing needs to be calculated'4The calculation method is as follows:
firstly, calculating the sum S of the lengths of a penultimate section of bar material to be sheared, a last section of bar material and the bar material left after shearing, wherein the method comprises the following steps:
the time when the bar completely passes through the first hot metal detector is taken as t1The time when the first hot metal detector does not detect the bar and the second hot metal detector detects the bar is t2Then the length S of the remaining bar in the finish rolling area is calculated1＝V1×(t1-t2) In which V is1Is the speed of movement of the bar at the second hot metal detector, and is also H1The speed of the rolling mill and the distance length from the second hot metal detector to the cutting edge of the double-length flying shear are S3If S is equal to S1+L′2+S3；
The length L 'of the remaining rod is then predicted after shearing'4Is divided by a second set multiple length L'2Remainder of (1), comparison of L'4And adjusting the length of the multiple length when the penultimate section of bar and the last section of bar are cut respectively according to the length X of the buffer section between the multiple length flying shear and the cooling bed.
In one embodiment, when the sum of the length of the rest bar and the length of the last bar is expected to be greater than or equal to the set length of the cooling bed, the multi-length flying shear continues to shear the penultimate bar, because if the last bar is not sheared, the length of the last bar is similar to the set length of the cooling bed or the length of the last bar exceeds the set length of the cooling bed, a safety accident occurs when the bars are cooled;
when the sum of the lengths of the rest bars and the last bar is predicted to be greater than a second set multiple length L'2And when the length of the bar material is less than the length set by the cooling bed, the penultimate bar material and the last bar material are sheared according to the size relation between the length of the predicted remaining bar material and the length X of the buffer segment.
In one of the embodiments, the length L 'of the remaining rod is predicted'4When the length X of the buffer section is smaller than that of the multi-length flying shear, the shearing is stopped after the penultimate bar is sheared by the multi-length flying shear, namely the last bar is not sheared any more, the predicted rest bar is added to the last bar, and if the bar is sheared, the rest bar is retained in the buffer section;
when the length L 'of the remaining rod is predicted'4Less than a second set multiple length L'2And the length L 'of the remaining rod is predicted'4When the length of the second set multiple length is larger than the length X of the buffer segment, the second set multiple length is adjusted to be a third multiple length L ″, when the multiple length flying shear shears the penultimate rod and the last rod2＝L′2+L′4And/2, the last section of the bar is averagely divided into two parts which are respectively added to the penultimate section of the bar and the last section of the bar.
In one embodiment, H can be calculated by calculating the speed of the bar at the exit of each stand of the finishing section1The speed of the rolling mill, the speed V of the bar at the exit of each stand of the finishing section, N × D/i × R, where N is the speed of rotation of the corresponding stand, D is the working diameter of the rolls of the corresponding stand, i is the reduction ratio, R is an empirical value, which corrects the calculation errors due to the measurement errors of the diameter of the rolls and the non-uniformity of the density of the bar according to the actual conditions in the field, H1The rotating speed, the working diameter of the roller, the reduction ratio and the empirical value of the rolling millCalculate H1Speed V of rolling mill1。
In one embodiment, the magnitude of the empirical value R is related to the wear of the roll, and the greater the wear of the roll, the greater the empirical value R. After the roller is abraded, the speed of the bar passing through the rolling mill is increased, so that the size of the empirical value is in positive correlation with the abrasion degree of the roller, and the greater the abrasion degree of the roller is, the more the empirical value needs to be correspondingly increased, so that the calculated speed V is consistent with the actual speed V.
In conclusion, the invention has the following beneficial effects:
according to the invention, the length of the residual bar after shearing is calculated, the length of the residual bar is compared with the first set multiple length, when the length of the residual bar is smaller than the first set multiple length, the first set multiple length is adjusted to be the second set multiple length, and the bar is sheared by using the multiple length flying shear according to the second set multiple length, so that the short length after shearing is reduced, the yield of the bar is effectively improved, and production accidents are reduced, thereby improving the operation efficiency;
in addition, the multiple-length flying shears shear shears the bars according to the second set multiple length, and the bars may still remain after the bars are sheared, so that the length of the predicted remaining bars needs to be calculated, and the length of the second multiple length is adjusted again according to the predicted length of the remaining bars, thereby effectively avoiding the situation of short tail after the last section of bars is sheared, effectively reducing steel piling accidents in the buffer section and the apron board, and greatly improving the operating efficiency.
Drawings
FIG. 1 is a schematic illustration of bar shearing;
FIG. 2 is a schematic flow diagram of the present invention.
In the figure: 1-a first hot metal detector; 2-a second hot metal detector; 3-H1A rolling mill; 4-H2A rolling mill; 5-multiple length flying shear.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
It should be noted that all the directional terms such as "upper" and "lower" referred to herein are used with respect to the view of the drawings, and are only for convenience of description, and should not be construed as limiting the technical solution.
The existing multiple length shearing method is to shear the bar material according to the fixed length multiple length by calculating the length according to the outlet speed of a finished product rolling mill and a hot metal detector before the multiple length shearing, and is easily influenced in multiple aspects, for example, the roller of the rolling mill has abrasion defects and the length of an incoming material bar is unstable, the length of the residual bar material cannot be accurately predicted, and the situation of short tail often occurs when the last section of bar material is sheared, namely, the length of the residual bar material after shearing is too short, and is only a few meters or a dozen meters, so that the steel piling accident is easily caused in a buffer section or a skirting board. Therefore, the present invention provides a novel bar double length subsection control method, as shown in fig. 1 and fig. 2, a first set double length is set, the first set double length can be set according to production requirements, the total length of a bar passing through a finishing rolling area is calculated, then under the condition of the first set double length, the number of cut bars and the length of the remaining cut bars are calculated, the length of the remaining bars is compared with the first set double length, and when the length of the remaining bars is smaller than the first set double length, the first set double length is adjusted, and the specific control method is as follows:
firstly, calculating the total length of the bar after passing through a finish rolling area: the second rolling mill with the number of inversions in the finish rolling area is H1Rolling mill 3, the last rolling mill in the finish rolling area is H2Rolling mill 4, through H1Rod volume V of rolling mill 3H1＝T1×V1×M1Wherein, T1The whole bar completely passes through H1Time of rolling mill 3, V1Is H1Speed of rolling mill 3, M1Is H1The pass area of the rolling mill 3 is such that the rod passes through H since the volume of the rod is not changed during the finish rolling2The length after the rolling mill 4, i.e. the total length L of the bar after finish rolling, is equal to VH1/M2Wherein M is2Is H2Pass area of the mill. The method can simply and quickly calculate the total length of the bar after finish rolling, and the shears are calculated according to the total length of the bar and the first set multiple lengthThe number of cuts and the length of the remaining rod after cutting. In the rolling process, the rolling mill applies pressure to the bar to change the shape of the bar, so that the bar becomes longer, the length of the bar is changed when the bar enters a finish rolling area and leaves the finish rolling area, and the shearing of the bar is based on the length of the bar after finish rolling is completed, so that the total length of the bar after leaving the finish rolling area needs to be calculated firstly.
Wherein H is calculated by calculating the speed of the bar at the exit of each stand of the finishing section1The speed of the rolling mill, the speed V of the bar at the exit of each stand of the finishing section, N × D/i × R, where N is the speed of rotation of the corresponding stand, D is the working diameter of the rolls of the corresponding stand, i is the reduction ratio, R is an empirical value, which corrects the calculation errors due to the measurement errors of the diameter of the rolls and the non-uniformity of the density of the bar according to the actual conditions in the field, H1H can be calculated by the rotating speed, the working diameter of the roller, the reduction ratio and the empirical value of the rolling mill 31Speed V of rolling mill 31。
The magnitude of the empirical value R is related to the degree of wear of the roll, the greater the empirical value R. After the roller is abraded, the speed of the bar passing through the rolling mill is increased, so that the size of the empirical value is in positive correlation with the abrasion degree of the roller, the larger the abrasion degree of the roller is, the empirical value needs to be correspondingly increased, the calculated speed V is consistent with the actual speed V, and the error of subsequent calculation is reduced.
The method for calculating the empirical value is to measure the speed of the rolling mill for a plurality of times, compare the measured speed with a theoretical speed value without adding the empirical value R, and obtain the empirical value by combining the roll diameter measurement error and the uneven density of the bar material during each measurement. The empirical value can also be judged by a finished product diameter measuring instrument, when the diameter of the finished bar exceeds the set requirement of the process or becomes elliptical, the speed can be adjusted by adjusting the speed or contracting the roll gap, and the empirical value is compared with the theoretical speed value to obtain the data of the empirical value.
A first hot metal detector 1 is arranged in front of the finish rolling area, a second hot metal detector 2 is arranged behind the finish rolling area, the second hot metal detector 2 is positioned in front of a double-length flying shear 5,when the tail end of the bar passes through the first hot metal detector 1, the bar is divided into a length L which is not cut before the multi-length flying shear 51And length L of completed cut3The first set multiple length is L2Wherein the length L of the bar subjected to shearing3Is integral multiple of the first set multiple length, and passes through the total length L after the bar material is finish rolled and the first set multiple length L2Calculating the shearing times n and the length L of the residual bar4The number of the bars after complete shearing is equal to the shearing frequency plus one;
if the length L of the remaining rod is L4Is less than the first set multiple length L2Adjusting the first set multiple length to be a second set multiple length L'2＝L2+L4And/n, namely, equally dividing the whole bar into a plurality of sections with equal length.
Since there is still an error in the above calculation, when the double-length flying shear 5 is incorporated into the production practice, after the rod material is sheared according to the second set double-length, there is a possibility that a short tail will occur, and there is a remaining rod material, so it is necessary to calculate the length L 'of the remaining rod material predicted after shearing'4The calculation method is as follows:
firstly, calculating the sum S of the lengths of a penultimate section of bar material to be sheared, a last section of bar material and the bar material left after shearing, wherein the method comprises the following steps:
the time when the bar completely passes through the first hot metal detector 1 is taken as t1The time when the first hot metal detector 1 does not detect the rod and the second hot metal detector 2 detects the rod is t2Then the length S of the remaining bar in the finish rolling area is calculated1＝V1×(t1-t2) In which V is1Is the speed of movement of the bar at the second hot metal detector 2 and is also H1The speed of the rolling mill 3 and the distance length from the second hot metal detector 2 to the cutting edge of the double-length flying shear 5 are S3If S is equal to S1+L′2+S3(ii) a Wherein, V is the principle that the second flow and the passing time of any rolling mill are equal1×t1Is represented by H1The calculated length of bar passing through the first hot metal detector 1, representative of the speed of the rolling mill 3The total length of the bar that is finished rolling; v1×t2The length of the bar, which represents the length of the bar that has been sheared and is about to be sheared, from the point where the bar completely enters the finishing zone to the point where the bar completely leaves the finishing zone, is thus S1＝V1×(t1-t2) The length of the bar remaining in the finish rolling zone is indicated, a distance still exists between the second hot metal detector 2 and the double-length flying shears, and the bar equal to the distance is not sheared yet, so that the length of the bar remaining in the finish rolling zone plus the length of the bar between the second hot metal detector 2 and the double-length flying shears 5 can be sheared at least once, and for the convenience of processing the length of the remaining bar after shearing, the length of the penultimate bar, that is, the second set double-length is also calculated, so that the sum S of the lengths of the penultimate bar, the last bar and the remaining bar after shearing is equal to S1+L′2+S3；
The length L 'of the remaining rod is then predicted after shearing'4Is divided by a second set multiple length L'2Remainder of (1), comparison of L'4And adjusting the length of the multiple length when the penultimate section of bar and the last section of bar are cut respectively according to the length X of the buffer section between the multiple length flying shear and the cooling bed. Wherein, buffer segment length X all is less than first multiple length of setting for and second multiple length of setting for, because finished product rod after cutting completely need enter into the cold bed in, if buffer segment length X is greater than the multiple length of setting for, then finished product rod can directly drop and cause the accident that steel is detained in the buffer segment.
When the sum of the lengths of the remaining rods and the last rod is predicted to be greater than or equal to the cooling bed setting length, even though the length L 'of the remaining rods is predicted'4When the length of the rod material is less than the length X of the buffer section, the multi-length flying shear 5 continues to shear the penultimate rod material after shearing the penultimate rod material, because if the rod material is not sheared, the length of the last rod material is close to the length set by the cooling bed or the length of the last rod material exceeds the length set by the cooling bed, safety accidents occur when the rod material is cooled;
when the sum of the lengths of the rest bars and the last bar is predicted to be greater than a second set multiple length L'2And when the length of the bar material is less than the length set by the cooling bed, the penultimate bar material and the last bar material are sheared according to the size relation between the length of the predicted remaining bar material and the length X of the buffer segment.
When the length L 'of the remaining rod is predicted'4When the length X of the buffer section is smaller than that of the multi-length flying shear, the shearing is stopped after the penultimate bar is sheared by the multi-length flying shear, namely the last bar is not sheared any more, the predicted rest bar is added to the last bar, and if the bar is sheared, the rest bar is retained in the buffer section;
when the length L 'of the remaining rod is predicted'4Less than a second set multiple length L'2And the length L 'of the remaining rod is predicted'4When the length of the second set multiple length is larger than the length X of the buffer segment, the second set multiple length is adjusted to be a third multiple length L ″, when the multiple length flying shear shears the penultimate rod and the last rod2＝L′2+L′4And/2, the last section of the bar is averagely divided into two parts which are respectively added to the penultimate section of the bar and the last section of the bar.
The invention calculates the running speeds of the bars at the outlets of different frames according to the rolling program set by the steel rolling process through the mathematical analysis of multiple-length shearing; then calculating the rolling stock pass H1The rod volume of the rolling mill 3 is used to calculate the rod passing H2The length of the rolling mill 4, i.e. the length of the finished bar, is used as the data for providing reference for the setting of the shearing control according to the invention; finally, the length calculated according to the size of the finished bar is set, and the length of the last section of bar after being sheared is calculated according to the number of the shearing knives of the length of the multiple length set by the process so as to set whether to carry out shearing again. The invention converts the short tail condition into the length increase of the penultimate section bar and the last section bar, reduces the short length after shearing, effectively improves the yield of the bar, and reduces the production accidents, thereby improving the operation efficiency.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (10)
1. The novel bar double-length sectional control method is characterized by comprising the steps of setting a first set double-length, calculating the total length of a bar passing through a finish rolling area, calculating the number of the sheared bar and the length of the residual bar after shearing under the condition of the first set double-length, comparing the length of the residual bar with the first set double-length, and adjusting the first set double-length when the length of the residual bar is smaller than the first set double-length.
2. The novel method for controlling the multiple length of the bar material according to claim 1, wherein the method for calculating the total length of the bar material after passing through the finishing area comprises the following steps:
the second rolling mill with the number of inversions in the finish rolling area is H1A rolling mill (3) taking the last rolling mill in the finish rolling area as H2Rolling mill (4) through H1Volume V of bar material of rolling mill (3)H1＝T1×V1×M1Wherein, T1The whole bar completely passes through H1Time of rolling mill (3), V1Is H1Speed of rolling mill (3), M1Is H1The pass area of the rolling mill (3) is such that the rod passes through the H-pass because the volume of the rod is not changed during the finish rolling2The length after the rolling mill (4), i.e. the total length L of the bar after finish rolling is equal to VH1/M2Wherein M is2Is H2The pass area of the rolling mill (4).
3. The method of claim 2, wherein the total length L of the bar after finish rolling and the first set length L are passed through2Calculating the shearing times n and the length L of the residual bar4；
If the length L of the remaining rod is L4Is less than the first set multiple length L2Then adjust itThe first set multiple length is set as the second set multiple length L'2＝L2+L4/n。
4. The novel bar material multiple length segment control method according to claim 3, wherein a second set multiple length L 'is used'2The bar may remain after shearing, and the length L 'of the bar expected to remain after shearing needs to be calculated'4The calculation method is as follows:
firstly, calculating the sum S of the lengths of a penultimate section of bar material to be sheared, a last section of bar material and the bar material left after shearing, wherein the method comprises the following steps:
a first hot metal detector (1) is arranged in front of the finish rolling area, a second hot metal detector (2) is arranged behind the finish rolling area, the second hot metal detector (2) is positioned in front of the double-length flying shear, and the time when the bar completely passes through the first hot metal detector (1) is t1The time when the first hot metal detector (1) does not detect the bar and the second hot metal detector (2) detects the bar is t2Then the length S of the remaining bar in the finish rolling area is calculated1＝V1×(t1-t2) In which V is1Is the bar movement speed at the second hot metal detector (2) and is also H1The speed of the rolling mill (3) and the distance length from the second hot metal detector (2) to the cutting edge of the double-length flying shear (5) are S3If S is equal to S1+L′2+S3；
The length L 'of the remaining rod is then predicted after shearing'4Is divided by a second set multiple length L'2Remainder of (1), comparison of L'4And the length X of the buffer segment between the multi-length flying shear (5) and the cooling bed is respectively adjusted to the length of the multi-length when the penultimate section of the bar and the last section of the bar are sheared.
5. The novel method for controlling the multiple length of the rod material according to claim 4, wherein when the sum of the length of the rest of the rod material and the length of the last rod material is estimated to be greater than or equal to the length set by the cooling bed, the multi-length flying shear (5) continues to shear the penultimate rod material.
6. The novel bar material multiple-length subsection control method of claim 4, wherein when the sum of the length of the rest bar material and the length of the last bar material is predicted to be greater than the second set multiple-length L'2And when the length of the bar material is less than the length set by the cooling bed, the penultimate bar material and the last bar material are sheared according to the size relation between the length of the predicted remaining bar material and the length X of the buffer segment.
7. The method for controlling multiple-length section of bar material according to claim 6, wherein the length L 'of the remaining bar material is predicted'4When the length is less than the length X of the buffer segment, the multi-length flying shear (5) stops shearing after shearing the penultimate bar.
8. The method for controlling multiple-length section of bar material according to claim 7, wherein the length L 'of the remaining bar material is predicted'4Less than a second set multiple length L'2And the length L 'of the remaining rod is predicted'4When the length of the second set multiple length is larger than the length X of the buffer segment, the multiple length flying shear (5) cuts the penultimate section of bar and the last section of bar, and the second set multiple length is adjusted to be the third multiple length L ″2＝L′2+L′4And/2, the last section of the bar is averagely divided into two parts which are respectively added to the penultimate section of the bar and the last section of the bar.
9. A novel method for controlling the multiple length of rod according to any one of claims 1 to 8, characterized in that H is calculated by calculating the speed of the rod at the exit of each stand of the finishing section1The speed of the rolling mill, the speed V of the bar at the exit of each stand of the finishing section, N × D/i × R, where N is the speed of rotation of the corresponding stand, D is the working diameter of the rolls of the corresponding stand, i is the reduction ratio, R is an empirical value, which corrects the calculation errors due to the measurement errors of the diameter of the rolls and the non-uniformity of the density of the bar according to the actual conditions in the field, H1Rotation speed, roll working diameter and reduction ratio of rolling millCan calculate H by summing with empirical values1Speed V of rolling mill (3)1。
10. The novel bar material multiple length subsection control method according to claim 9, wherein the empirical value R is related to the wear degree of the roller, and the greater the wear degree of the roller, the greater the empirical value R.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110256702.6A CN113083899B (en) | 2021-03-09 | 2021-03-09 | Novel bar multiple-length sectional control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110256702.6A CN113083899B (en) | 2021-03-09 | 2021-03-09 | Novel bar multiple-length sectional control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113083899A true CN113083899A (en) | 2021-07-09 |
| CN113083899B CN113083899B (en) | 2022-03-08 |
Family
ID=76667816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110256702.6A Active CN113083899B (en) | 2021-03-09 | 2021-03-09 | Novel bar multiple-length sectional control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113083899B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426840A (en) * | 2021-07-16 | 2021-09-24 | 北京佰能盈天科技股份有限公司 | Negative tolerance rolling and short rule control method for bar production line |
| CN114273441A (en) * | 2021-12-02 | 2022-04-05 | 攀枝花钢城集团有限公司 | Steel conveying method and system |
| CN114769327A (en) * | 2022-05-19 | 2022-07-22 | 广西钢铁集团有限公司 | Multiple-length shearing control method for hot-rolled ribbed steel bars |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000107804A (en) * | 1998-10-02 | 2000-04-18 | Sumitomo Metal Ind Ltd | Method for deciding cutting length of bar steel and device therefor |
| CN102441569A (en) * | 2011-12-09 | 2012-05-09 | 中冶南方（武汉）自动化有限公司 | New method for controlling flying shears for bars and wires based on T400 |
| CN103331481A (en) * | 2013-06-14 | 2013-10-02 | 江苏永钢集团有限公司 | Method for controlling shearing length of multi-length flying shear |
| CN104148406A (en) * | 2014-08-15 | 2014-11-19 | 内蒙古包钢钢联股份有限公司 | Double-length flying shear optimal shearing method |
| CN105868871A (en) * | 2016-05-19 | 2016-08-17 | 莱芜钢铁集团电子有限公司 | Method for optimizing double-length shearing of small and medium sized section steel |
-
2021
- 2021-03-09 CN CN202110256702.6A patent/CN113083899B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000107804A (en) * | 1998-10-02 | 2000-04-18 | Sumitomo Metal Ind Ltd | Method for deciding cutting length of bar steel and device therefor |
| CN102441569A (en) * | 2011-12-09 | 2012-05-09 | 中冶南方（武汉）自动化有限公司 | New method for controlling flying shears for bars and wires based on T400 |
| CN103331481A (en) * | 2013-06-14 | 2013-10-02 | 江苏永钢集团有限公司 | Method for controlling shearing length of multi-length flying shear |
| CN104148406A (en) * | 2014-08-15 | 2014-11-19 | 内蒙古包钢钢联股份有限公司 | Double-length flying shear optimal shearing method |
| CN105868871A (en) * | 2016-05-19 | 2016-08-17 | 莱芜钢铁集团电子有限公司 | Method for optimizing double-length shearing of small and medium sized section steel |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113426840A (en) * | 2021-07-16 | 2021-09-24 | 北京佰能盈天科技股份有限公司 | Negative tolerance rolling and short rule control method for bar production line |
| CN114273441A (en) * | 2021-12-02 | 2022-04-05 | 攀枝花钢城集团有限公司 | Steel conveying method and system |
| CN114769327A (en) * | 2022-05-19 | 2022-07-22 | 广西钢铁集团有限公司 | Multiple-length shearing control method for hot-rolled ribbed steel bars |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113083899B (en) | 2022-03-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113083899B (en) | Novel bar multiple-length sectional control method | |
| CN113000600A (en) | Full-scale bar system and control method | |
| CN104307892B (en) | The method of band head correction in tandem rolling crossing process | |
| EP2580006B1 (en) | Method and device to control the section sizes of a rolled product | |
| JP5960848B2 (en) | Method for controlling a production plant of two continuous strands obtained from a single billet | |
| JP2005095975A (en) | Method and device for controlling thickness of rolled product | |
| US5791182A (en) | Method to control between rolling stands the drawing of the rolled stock and relative device | |
| CN215032432U (en) | Full multiple length system of rod | |
| US20150027186A1 (en) | Plant to control the section area of a rolled product and corresponding method | |
| CA1279712C (en) | Method of controlling product tension in a rolling mill | |
| EP0013539B1 (en) | Speed control method for a continuous casting installation | |
| CN217315139U (en) | Bar production line and high-precision product intelligent control system thereof | |
| CN107042240B (en) | A kind of high precision plate strip rolling process dynamic variable specification implementation method based on feature point tracking | |
| KR101674773B1 (en) | Method of strip metal out in finishing mill | |
| US6519990B1 (en) | Method and a device for controlling a rolling mill | |
| EP1097008B1 (en) | A method and a device for controlling tail dimensions in a rolling mill | |
| CN109425319B (en) | Method for detecting influence degree of pickling process on transverse section | |
| JP5637906B2 (en) | Thickness control method and thickness control device for cold rolling mill | |
| KR101442903B1 (en) | Method for dividing hot rolled strip and system thereof | |
| RU2762353C1 (en) | Method for continuous cold rolling with tension | |
| CN111360077B (en) | Control method for preventing strip steel from throwing into acid tank | |
| JP3080509B2 (en) | Roll gap correction control method in strip rolling mill | |
| EP1097009B1 (en) | A method and a device for controlling the dimensions of an elongated material rolled in a rolling mill | |
| JPH0344844B2 (en) | ||
| CN116324654A (en) | Abnormality detection device |
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 |