CN113770179B - Tapping rhythm control method - Google Patents
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- CN113770179B CN113770179B CN202111105696.0A CN202111105696A CN113770179B CN 113770179 B CN113770179 B CN 113770179B CN 202111105696 A CN202111105696 A CN 202111105696A CN 113770179 B CN113770179 B CN 113770179B
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- 238000010079 rubber tapping Methods 0.000 title claims abstract description 46
- 230000033764 rhythmic process Effects 0.000 title claims abstract description 30
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000005520 cutting process Methods 0.000 claims abstract description 179
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 78
- 239000010959 steel Substances 0.000 claims abstract description 78
- 238000005096 rolling process Methods 0.000 claims abstract description 63
- 238000007689 inspection Methods 0.000 claims abstract description 18
- 230000001960 triggered effect Effects 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 238000010008 shearing Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000003203 everyday effect Effects 0.000 description 1
- 230000001953 sensory effect Effects 0.000 description 1
- 230000017260 vegetative to reproductive phase transition of meristem Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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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
- B21B37/005—Control of time interval or spacing between workpieces
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Abstract
The invention discloses a tapping rhythm control method, which comprises the steps that when the head of round steel reaches 1# hot inspection, a PLC calculates the head cutting condition of 1# flying shears according to the set head cutting length, and when the head cutting condition of 1# flying shears is met, a head cutting instruction is triggered, and the 1# flying shears performs head cutting action; when the head of the round steel reaches the 15# rolling mill, the side loop starts the loop; when the tail of the round steel breaks away from the No. 1 hot inspection, the PLC calculates the tail cutting condition of the No. 1 flying shears according to the set tail cutting length, and when the tail cutting condition of the No. 1 flying shears is met, a tail cutting instruction is triggered, and the No. 1 flying shears perform tail cutting action; when the tail part of the round steel is separated from the 12# rolling mill, the biting steel signal of the 12# rolling mill is changed into 0, the 0 signal is kept, the sleeve falling delay time is set, and after the sleeve falling delay time is reached, the PLC sends out a sleeve falling instruction, and the side loopers carry out sleeve falling. The invention has the characteristics of good tapping rhythm control stability, difficult steel piling and high working efficiency.
Description
Technical Field
The invention relates to a tapping method, in particular to a tapping rhythm control method.
Background
In the tapping process of the steel mill, round steel sequentially passes through a No. 5-15 rolling mill, as shown in FIG. 1. In the existing steel tapping control technology, a 1# flying shear and a 2# flying shear control the shearing mode of the flying shears by calculating the set length of a steel billet, and reset after the heat detection signal disappears for a set time. However, when the steel pace is smaller than the set time, the situation that the calculated length of the tail cutting of the previous steel billet does not reach the set tail cutting length, the head of the next steel billet reaches the 1# hot inspection position, so that shearing abnormality is caused, once the quality of the interior of the steel billet is poor, the phenomenon of flowering and head cutting occurs, round steel cannot normally enter the next rolling mill, and steel stacking accidents are caused; in addition, in the existing steel tapping control technology, the sleeve falling control is carried out in a sleeve falling mode when the steel biting signal of the sleeve falling control motor (12 # rolling mill) is 0, so that the steel biting signal of the sleeve falling control motor (12 # rolling mill) cannot be 1 before sleeve falling, otherwise, the phenomenon of sleeve falling does not occur, namely the steel bar cannot reach the rolling mill at the position before sleeve falling, thereby limiting the steel passing rhythm, prolonging the steel placing interval time and slowing the steel tapping speed
And tapping is with reference to the steel biting signal indicator lamp scintillation number of times of 5# rolling mill, namely the indicator lamp begins to flash when the steel biting signal of 5# rolling mill is 0, and 0.5 seconds flashes once to control tapping time rhythm between two adjacent steels, has certain error, and the steel passing rhythm is not well controlled, causes the tapping unstable, and is quick and slow, has slow and has influenced continuity and the output of production, and tapping rhythm is quick, can take place the steel stacking accident.
Therefore, the existing tapping control method has the problems of poor tapping rhythm control stability, easiness in steel piling and low working efficiency.
Disclosure of Invention
The invention aims to provide a tapping rhythm control method. The invention has the characteristics of good tapping rhythm control stability, difficult steel piling and high working efficiency.
The technical scheme of the invention is as follows: a tapping rhythm control method comprises the steps that round steel sequentially passes through a No. 5-15 rolling mill, when the head of the round steel reaches a No.1 hot inspection, a No.1 flying shear is in a head cutting state, a PLC calculates head cutting conditions of the No.1 flying shear according to set head cutting lengths, a head cutting instruction is triggered when the head cutting conditions of the No.1 flying shear are met, and the No.1 flying shear performs head cutting action;
When the head of the round steel reaches the 15# rolling mill, the side loop starts the loop;
When the tail of the round steel breaks away from the 1# hot inspection, the 1# hot inspection is in a tail cutting state, the PLC calculates the tail cutting condition of the 1# flying shears according to the set tail cutting length, and when the tail cutting condition of the 1# flying shears is met, a tail cutting instruction is triggered, and the 1# flying shears perform tail cutting action;
when the tail part of the round steel is separated from the 12# rolling mill, the biting steel signal of the 12# rolling mill is changed into 0, the 0 signal is kept, the sleeve falling delay time is set, and after the sleeve falling delay time is reached, the PLC sends out a sleeve falling instruction, and the side loopers carry out sleeve falling.
In the above method for controlling the tapping rhythm, the head cutting condition of the 1# flying shears is that the head cutting value of the 1# flying shears which are sequentially accumulated is equal to or more than the head cutting set value of the 1# flying shears.
In the foregoing method for controlling the tapping rhythm, the value of the head of the 1# flying shear is the linear speed x 1.02 x 0.01 of the previous rolling mill of the 1# flying shear, and the values are accumulated once every 10 milliseconds; the set value of the head cutting set of the No. 1 flying shears is the center distance from the outlet of the previous rolling mill to the No. 1 flying shears and the set head cutting length is the head cutting length compensation of the No. 1 flying shears.
In the above method for controlling the tapping rhythm, the tail cutting condition of the 1# flying shears is that the tail cutting value of the 1# flying shears which are sequentially accumulated is equal to or more than the tail cutting set value of the 1# flying shears.
In the foregoing method for controlling the tapping rhythm, the tail value of the 1# flying shear is the linear speed x 0.98 x 0.01 of the subsequent rolling mill of the 1# flying shear, and the tail value is accumulated once every 10 milliseconds; the tail cutting set value of the No. 1 flying shears is the distance from the No. 1 hot detection to the center of the No. 1 flying shears, namely the set tail cutting length and the tail cutting length compensation of the No. 1 flying shears.
In the foregoing method for controlling the tapping rhythm, when the head of the round steel reaches the 2# hot inspection, the 2# flying shears are in a head cutting state, the PLC calculates the head cutting condition of the 2# flying shears according to the set head cutting length, and when the head cutting condition of the 2# flying shears is satisfied, the head cutting command is triggered, and the 2# flying shears perform head cutting action.
In the tapping rhythm control method, the head cutting conditions of the No.2 flying shears are that the head cutting values of the No.2 flying shears which are sequentially accumulated are equal to or more than the head cutting set values of the No.2 flying shears; wherein, the value of the crop head of the No.2 flying shear is the linear speed of the former rolling mill of the No.2 flying shear multiplied by 1.02 multiplied by 0.01, and accumulated once every 10 milliseconds; the set value of the head cutting set value of the No.2 flying shears is the center distance between the outlet of the rolling mill of the previous frame of the No.2 flying shears and the set head cutting length-2 head cutting length compensation of the No.2 flying shears.
In the foregoing method for controlling the tapping rhythm, when the tail of the round steel breaks away from the 2# hot inspection, the 2# flying shears are in a tail cutting state, the PLC calculates the tail cutting condition of the 2# flying shears according to the set head cutting length, and when the tail cutting condition of the 2# flying shears is met, the tail cutting instruction is triggered, and the 2# flying shears perform tail cutting action.
In the method for controlling the tapping rhythm, the tail cutting condition of the No.2 flying shears is that the tail cutting value of the No.2 flying shears which are sequentially accumulated is more than or equal to the tail cutting set value of the No.2 flying shears; the tail cutting value of the No.2 flying shears is the linear speed multiplied by 0.98 multiplied by 0.01 of the next rolling mill of the No.2 flying shears, and the tail cutting value is accumulated once every 10 milliseconds; the tail cutting set value of the No.2 flying shears is the tail cutting length compensation of the No.2 flying shears, which is the distance from the No.2 hot detection to the center of the No.2 flying shears.
Compared with the prior art, the invention ensures the normal tail cutting through improving the shearing of the flying shears and the delay control mode of the falling sleeve of the side loop, namely, prolonging the state of the 1# thermal detection signal, and ensures the normal falling sleeve of the loop by delaying the 0 biting steel signal of the 2# rolling mill, thereby adjusting the whole tapping rhythm, leading the small-specification (the diameter is less than 20 mm) round steel variety to realize the non-interval production, and increasing the yield by about 20 tons for 24 hours; the large-specification round steel variety (with the diameter larger than 20 mm) realizes the intermittent point production at intervals of 1 second, the yield of 24 hours is increased by about 50 tons, and the effective production time can be saved by 20-30 minutes every day; the tapping rhythm is quickened, the head and the tail follow, the rhythm is compact, the efficiency is improved, and the average tapping interval time can be shortened by 2-3 seconds.
The method has the advantages of improving the productivity, increasing the benefit by 2000-3000 yuan per day, increasing the annual benefit by 60-90 ten thousand, reducing the rolling waste, greatly reducing the cost and increasing the benefit.
Therefore, the invention adjusts the tapping rhythm and has the characteristics of good tapping rhythm control stability, difficult steel piling and high working efficiency.
Drawings
Fig. 1 is a schematic view of the tapping flow of the present invention.
Detailed Description
The invention is further illustrated by the following examples, which are not intended to be limiting.
Examples:
As shown in fig. 1, the head of round steel with a length of about 12 meters sequentially passes through a rolling mill 5# to 15# and when the round steel enters the rolling mill, the biting steel signal on the rolling mill is 1, and when the round steel leaves the rolling mill, the biting steel signal of the rolling mill is 0 (the biting steel signal is obtained by detecting the current of the PLC through the rolling mill). When the head of the round steel reaches the 1# hot inspection, the 1# flying shears are in a head cutting state, the PLC calculates head cutting conditions of the 1# flying shears according to the set head cutting length, when the head cutting conditions of the 1# flying shears are met, the actual length of the round steel reaching the 1# flying shears is equal to the set length, a head cutting instruction of the 1# flying shears is triggered, the accumulated 1# flying shears data are cleared, and the 1# flying shears perform head cutting action.
The head cutting condition of the No. 1 flying shears is that the head cutting value of the No. 1 flying shears which are sequentially accumulated is more than or equal to the head cutting set value of the No. 1 flying shears; the head cutting value of the No. 1 flying shear is the linear speed of a rolling mill in front of the No. 1 flying shear multiplied by 1.02 multiplied by 0.01, accumulated once every 10 milliseconds, and 1.02 is the forward slip coefficient of the rolling mill; the head cutting set value of the No. 1 flying shear is the center distance between the outlet of the rolling mill of the previous frame of the No. 1 flying shear and the head cutting length of the set head cutting length-1 flying shear.
For example, if the previous rolling mill of the 1# flying shear is the 8# rolling mill, and the linear speed of the 8# rolling mill is 0.81m/s, the head cutting value of the 1# flying shear is 0.81×1.02×0.01= 0.00826; the distance from the outlet of the 8# rolling mill to the center of the 1# flying shears is 2.1, the set head cutting length is 0.83, the head cutting length compensation is 1.4, the head cutting set value of the 1# flying shears is 2.1+0.83-1.4=1.53, when (0.00826+0.00826+ … n) is more than or equal to 1.53, a head cutting instruction is triggered, the head cutting values of the 1# flying shears stop accumulating, and the accumulated values are reset and recalculated when the head of the next round steel reaches the 1# hot inspection.
When the head of the round steel reaches the 2# hot inspection, the 2# flying shears are in a head cutting state, the PLC calculates the head cutting condition of the 2# flying shears according to the set head cutting length, and when the head cutting condition of the 2# flying shears is met, the actual length of the round steel reaching the 2# flying shears is equal to the set length, and a head cutting instruction of the 2# flying shears is triggered until the 2# flying shears completes the head cutting action;
the head cutting condition of the No. 2 flying shears is that the head cutting value of the No. 2 flying shears which are sequentially accumulated is more than or equal to the head cutting set value of the No. 2 flying shears;
the value of the cutting head of the No. 2 flying shear is that of the linear speed of the former rolling mill of the No. 2 flying shear multiplied by 1.02 multiplied by 0.01, and the cutting head is accumulated once every 10 milliseconds; the set value of the head cutting of the No. 2 flying shear is the center distance between the outlet of the rolling mill of the previous frame of the No. 2 flying shear and the set head cutting length-2 head cutting length compensation of the No. 2 flying shear.
When the head of the round steel reaches a 15# rolling mill, the biting steel signal of the 15# rolling mill becomes 1, and the side loop starts the loop;
when the tail of the round steel breaks away from the 1# hot inspection, the 1# hot inspection is in a tail cutting state, the PLC calculates the tail cutting condition of the 1# flying shears according to the set head cutting length, and when the tail cutting condition of the 1# flying shears is met, a tail cutting instruction of the 1# flying shears is triggered, and the 1# flying shears performs tail cutting action;
The tail cutting condition of the No.1 flying shears is that the tail cutting value of the No.1 flying shears which are sequentially accumulated is more than or equal to the tail cutting set value of the No.1 flying shears; the tail cutting value of the No.1 flying shear is that the linear speed of a rolling mill at the later stage of the No.1 flying shear is multiplied by 0.98 multiplied by 0.01, and accumulated once every 10 milliseconds, and 0.98 is the backward slip coefficient of the rolling mill; the tail cutting set value of the No.1 flying shears is the tail cutting length compensation of the No.1 flying shears, which is the distance from the No.1 hot detection to the center of the No.1 flying shears to the set tail cutting length.
For example, if the subsequent frame of the 1# flying shear is a 9# rolling mill, and the linear speed of the 9# rolling mill is 1.12 m/s, the tail cutting value of the 1# flying shear is 1.12×0.98×0.01= 1.0976; the distance from the 1# hot detection to the center of the 1# flying shear is 2.1, the set tail cutting length is 0.15,1# flying shear tail cutting length compensation is 0.065, then the tail cutting set value of the 1# flying shear is 2.1-0.15-0.065=1.885, when (0.10976+0.10976+ … n) is more than or equal to 1.885, the tail cutting instruction of the 1# flying shear is triggered, the tail cutting numerical value accumulation of the 1# flying shear is stopped, and the recalculation is carried out when the next steel tail-off 1# hot detection is waited.
When the tail of the round steel is separated from the 12# rolling mill, the biting steel signal of the 12# rolling mill is changed into 0, the rollers of the 12# rolling mill and the 11# rolling mill are online, the 0 biting steel signal of the 12# rolling mill is kept, the sleeve falling delay time is set, a PLC sends a sleeve falling instruction after the sleeve falling delay time is reached, and the side loop performs sleeve falling, so that the tail throwing phenomenon does not occur when the round steel is separated from the downstream frame of the loop.
When the steel biting signal is 1, the sleeve can be normally dropped due to delay, the tapping rhythm is compact, the tapping speed is increased, and the action of the loop is not influenced.
When the tail of the round steel breaks away from the No. 2 hot inspection, the No. 2 flying shears are in a tail cutting state, the PLC calculates tail cutting conditions of the No. 2 flying shears according to the set tail cutting length, and when the tail cutting conditions of the No. 2 flying shears are met, a tail cutting instruction of the No. 2 flying shears is triggered, and the No. 2 flying shears perform tail cutting action.
The tail cutting condition of the No. 2 flying shears is that the tail cutting value of the No. 2 flying shears which are sequentially accumulated is more than or equal to the tail cutting set value of the No. 2 flying shears; the tail cutting value of the No. 2 flying shears is that the linear speed of a rolling mill behind the No. 2 flying shears is multiplied by 0.98 multiplied by 0.01, and the number of the tail cutting values is accumulated once every 10 milliseconds; the tail cutting set value of the No. 2 flying shears is the tail cutting length compensation of the No. 2 flying shears, namely, the distance from the No. 2 hot detection to the center of the No. 2 flying shears is the set tail cutting length.
The steel tapping indicator lamp, the timing display screen and the steel biting signal of the No. 5 rolling mill are related, in the production state, when the steel biting signal of the No. 5 rolling mill is 1, the steel tapping indicator lamp is turned off, the timing display screen starts timing, when the steel biting signal of the No. 5 rolling mill is 0, the timing display screen rechems, and the steel tapping indicator lamp starts flashing to indicate the steel tapping rhythm. The tapping indicator lamp can provide strong sensory signals for operators, and the timing display screen can display the accurate time and the interval time of rolling a billet, so that visual data are provided for the operators to control tapping rhythm.
Claims (5)
1. A tapping rhythm control method is characterized in that: the method comprises the steps that round steel sequentially passes through a No. 5-No. 15 rolling mill, when the head of the round steel reaches No. 1 hot inspection, a PLC calculates the head cutting condition of No. 1 flying shears according to the set head cutting length, and when the head cutting condition of No. 1 flying shears is met, a head cutting instruction is triggered, and the No. 1 flying shears performs head cutting action; the head cutting condition of the No. 1 flying shears is that the head cutting value of the No. 1 flying shears which are sequentially accumulated is more than or equal to the head cutting set value of the No. 1 flying shears; the value of the cutting head of the No. 1 flying shear is the linear speed of the former rolling mill of the No. 1 flying shear multiplied by 1.02 multiplied by 0.01, and the cutting head is accumulated once every 10 milliseconds; the head cutting set value of the No. 1 flying shear is the center distance from the outlet of the previous rolling mill to the No. 1 flying shear plus the head cutting length of the No. 1 flying shear to compensate the head cutting length of the No. 1 flying shear;
When the head of the round steel reaches the 15# rolling mill, the side loop starts the loop;
When the tail of the round steel breaks away from the No. 1 hot inspection, the PLC calculates the tail cutting condition of the No. 1 flying shears according to the set tail cutting length, and when the tail cutting condition of the No. 1 flying shears is met, a tail cutting instruction is triggered, and the No. 1 flying shears perform tail cutting action; the tail cutting condition of the No. 1 flying shears is that the tail cutting value of the No. 1 flying shears which are sequentially accumulated is more than or equal to the tail cutting set value of the No. 1 flying shears; the tail cutting value of the No. 1 flying shear is the linear speed multiplied by 0.98 multiplied by 0.01 of the subsequent rolling mill of the No. 1 flying shear, and the tail cutting value is accumulated once every 10 milliseconds; the tail cutting set value of the No. 1 flying shear is the tail cutting length compensation of the No. 1 flying shear, which is the distance from the No. 1 hot detection to the center of the No. 1 flying shear;
when the tail part of the round steel is separated from the 12# rolling mill, the biting steel signal of the 12# rolling mill is changed into 0, the 0 signal is kept, the sleeve falling delay time is set, and after the sleeve falling delay time is reached, the PLC sends out a sleeve falling instruction, and the side loopers carry out sleeve falling.
2. A tapping cadence control method according to claim 1, characterized in that: when the head of the round steel reaches the 2# thermal inspection, the 2# flying shears are in a head cutting state, the PLC calculates the head cutting conditions of the 2# flying shears according to the set head cutting length, and when the head cutting conditions of the 2# flying shears are met, the head cutting instructions are triggered, and the 2# flying shears perform head cutting actions.
3. A tapping cadence control method according to claim 2, characterized in that: the head cutting condition of the No. 2 flying shears is that the head cutting value of the No. 2 flying shears which are sequentially accumulated is more than or equal to the head cutting set value of the No. 2 flying shears; wherein, the value of the crop head of the No. 2 flying shear is the linear speed of the former rolling mill of the No. 2 flying shear multiplied by 1.02 multiplied by 0.01, and accumulated once every 10 milliseconds; the set value of the head cutting set value of the No. 2 flying shears is the center distance between the outlet of the rolling mill of the previous frame of the No. 2 flying shears and the set head cutting length-2 head cutting length compensation of the No. 2 flying shears.
4. A tapping cadence control method according to claim 1, characterized in that: when the tail of the round steel breaks away from the No.2 hot inspection, the No.2 flying shears are in a tail cutting state, the PLC calculates tail cutting conditions of the No.2 flying shears according to the set tail cutting length, and when the tail cutting conditions of the No.2 flying shears are met, a tail cutting instruction is triggered, and the No.2 flying shears perform tail cutting action.
5. A tapping cadence control method according to claim 4, wherein: the tail cutting condition of the No. 2 flying shears is that the tail cutting value of the No. 2 flying shears which are sequentially accumulated is more than or equal to the tail cutting set value of the No. 2 flying shears; the tail cutting value of the No. 2 flying shears is the linear speed multiplied by 0.98 multiplied by 0.01 of the next rolling mill of the No. 2 flying shears, and the tail cutting value is accumulated once every 10 milliseconds; the tail cutting set value of the No. 2 flying shears is the tail cutting length compensation of the No. 2 flying shears, which is the distance from the No. 2 hot detection to the center of the No. 2 flying shears.
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| KR101091171B1 (en) * | 2004-12-29 | 2011-12-09 | 주식회사 포스코 | A control method for a corp shear in continuous hot rolling equipment |
| CN102205349B (en) * | 2010-03-30 | 2013-01-23 | 上海梅山钢铁股份有限公司 | Stable sleeve-dropping method for moveable sleeve of hot milling machine |
| CN102513355B (en) * | 2011-12-09 | 2014-07-02 | 中冶南方（武汉）自动化有限公司 | Control method for flying shear tail-shearing of rod wire |
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| CN107433287B (en) * | 2016-05-26 | 2019-06-25 | 宝山钢铁股份有限公司 | A kind of hot-rolling flying shears shear the dynamic control method of initial position end to end |
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| CN111672914B (en) * | 2020-07-01 | 2022-06-24 | 浙江富钢金属制品有限公司 | Cooling bed rack control method |
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| CN101003064A (en) * | 2007-01-18 | 2007-07-25 | 唐山钢铁股份有限公司 | Method for solving difficulty of looping tail at steel rolling production-line |
| 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 |
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Address after: No. 1, Fugang Road, Panjiazhuang Village, Jiuguan Town, Nanxun District, Huzhou City, Zhejiang Province Applicant after: Zhejiang Fugang Group Co.,Ltd. Address before: 313011 Fugang group, Jiuguan Town, Nanxun District, Huzhou City, Zhejiang Province Applicant before: ZHEJIANG FUGANG METAL PRODUCTS CO.,LTD. |
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