CN109127733B - Rectifying method for side guide plate of coiling machine - Google Patents
Rectifying method for side guide plate of coiling machine Download PDFInfo
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- CN109127733B CN109127733B CN201710509829.8A CN201710509829A CN109127733B CN 109127733 B CN109127733 B CN 109127733B CN 201710509829 A CN201710509829 A CN 201710509829A CN 109127733 B CN109127733 B CN 109127733B
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- 238000000034 method Methods 0.000 title claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 63
- 239000010959 steel Substances 0.000 claims abstract description 63
- 241000277275 Oncorhynchus mykiss Species 0.000 claims description 13
- 238000004886 process control Methods 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 238000005096 rolling process Methods 0.000 description 7
- 230000008901 benefit Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005098 hot rolling Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 101000872084 Danio rerio Delta-like protein B Proteins 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- 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
-
- 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
- B21B2015/0057—Coiling the rolled product
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Abstract
The invention relates to a rectifying method for a side guide plate of a coiling machine, which is characterized in that the technical scheme is used for correcting the head camber of strip steel in real time so as to conveniently enter a No. 2 coiling machine, namely, a computer system is used for judging the head camber of the strip steel at a laminar flow outlet, and calculating the action quantity of the side guide plate No. 1 in real time according to the camber offset so as to carry out unilateral rectifying on the side guide plate No. 1, thereby avoiding the blocking of scrap steel at the inlet of the side guide plate No. 2 when the head camber of the strip steel occurs.
Description
Technical Field
The invention relates to a deviation rectifying method, in particular to a deviation rectifying method for a side guide plate of a coiling machine, and belongs to the technical field of hot rolling coiling machines.
Background
The hot rolling process flow is mainly provided with the procedures of heating, rough rolling, finish rolling, coiling and the like, and is shown in figure 1. Firstly, according to a charging plan, a slab with the thickness of 200-250 mm is charged into a heating furnace 1 for heating. And (3) discharging the plate blank after the plate blank is heated to the required furnace time and the target temperature, and conveying the plate blank to a rough rolling high-pressure water descaling box 2 to remove the oxide scales on the surface of the plate blank. Then the blank is sent to a roughing mill 3 to roll into an intermediate blank with the thickness of 34-60 mm, the irregular part of the head is cut off by a flying shear 4, and then the intermediate blank enters a finish rolling high-pressure water descaling box 5 to remove secondary iron scales on the surface of the strip blank again, and the strip blank is sent to a finishing mill 6 to roll into finished strip steel with the thickness of 1.2-19 mm. And after the strip steel is subjected to finish rolling, cooling the high-temperature strip steel to the temperature required by the process by using laminar cooling equipment 7, and finally, entering a coiling machine 8 to be coiled into qualified steel coils.
The phenomenon of deviation from the central line can occur after the head of the strip steel is out of F7 due to uneven temperature of the strip steel, insufficient equipment precision, uneven roll gap of a rolling mill and the like. For this purpose, a side guide is provided in front of each coiler as shown in fig. 2 for guiding the strip smoothly into the coiler. When the 2# coiler rolls steel, the 1# side guide straight line segment 82 and the 2# side guide straight line segment 85 are at the same preset opening degree W (w=strip heat width b+one short stroke Δw 1 time +secondary short stroke ΔW 2 times +head actual ultra-wide quantity DeltaB+L1 margin W L1 +L2 margin W L2 The +operator intervention Wg), the head of the strip is guided by the laminar flow guard plate 71 after exiting the last frame F7 of the finishing mill, and then guided by the inclined line segment 81 of the side guide plate 1, and then sequentially guided by the straight line segment 82 of the side guide plate 1 and the pinch roll 1#83. The 2# side guide flare 84, the 2# side guide straight section 85, and finally the 2# pinch roll 86 enter the 2# coiler. In order to enable the head of the strip steel to smoothly enter the coiling machine and avoid the tower-shaped defect of the head of the steel coil, the head of the strip steel tracks to reach the straight line section M of the No. 1 side guide plate 1 In meter, the opening of the 1# side guide plate is reduced by DeltaW by one short stroke action 1 time Correcting the deviation of the head of the strip steel is convenient for entering the 2# side guide plate smoothly, and when the head of the strip steel enters the straight line section M of the 2# side guide plate 2 In meter time, the opening of the 2# side guide plate is reduced by DeltaW by one short stroke operation 1 time The strip head is directed into a # 2 coiler. Because there is no side guide plate device between the 1# side guide plate and the 2# side guide plate, when the head of the strip steel has a heavy camber, the head of the strip steel deviates from one side to strike the 2# side guide plate bell mouth after exiting from the 1# side guide plate, and when serious, the head of the strip steel is blocked to be sleeved with scrap steel. The strip deviation phenomenon is further aggravated by the smaller opening of the 1# side guide after one short stroke action of the 1# side guide, as shown in fig. 3, the head deviation of the strip 9 is serious toward the driving side, and when the strip head goes out of the 1# side guide parallel section 82 and does not enter the 2# side guide parallel section 85, the opening is reduced to W- Δw because the 1# side guide has already performed one short stroke action 1 time The strip is pressed by the parallel section working side 822 of the side guide and the head is further offset from the center line to the drive side.
The short stroke of the side guide plate has the following defects: when the strip steel enters the No. 2 side guide plate when the strip steel does not enter the No. 2 side guide plate, the opening of the No. 1 side guide plate needs to be smaller than that of the No. 2 side guide plate, so that the head of the strip steel enters the No. 2 coiling machine, but when the head of the strip steel has serious camber, the short stroke action of the side guide plate can aggravate the deviation of the head of the strip steel from the rolling center line, and the strip steel is seriously blocked by scrap steel. Therefore, a new solution is urgently needed to solve the technical problem.
Disclosure of Invention
The invention provides a rectifying method for a side guide plate of a coiling machine, which aims at the technical problems in the prior art, and the technical scheme corrects the camber of the head of strip steel in real time so as to be convenient for entering a No. 2 coiling machine smoothly. The method comprises the steps that a computer system judges the head camber of the strip steel at the laminar flow outlet, calculates the action quantity of a No. 1 side guide plate according to the camber offset in real time, and carries out unilateral deviation correction on the No. 1 side guide plate, so that the blocking of scrap steel at the inlet of the No. 2 side guide plate during the head camber of the strip steel is avoided.
In order to achieve the above object, the technical scheme of the invention is as follows, and the rectifying method of the side guide plate of the coiling machine is characterized by comprising the following steps: 1) The coiling inlet is provided with a width measuring instrument, and when the head of the strip steel enters the 1# side guide plate, the maximum value Bmax of the width of the head is measured by the maximum value Y of the center offset of the strip steel 0-X meters measured by the coiling inlet;
2) The entrance of the coiling machine is provided with a pyrometer for correcting the head position of the strip steel which is tracked and calculated by a computer;
3) The process control computer sets a 1# side guide head preset opening degree W1, sets a 2# side guide head preset opening degree W2 (normally w1=w2), and if (Bmax/2 + |y|) x 2 < W1- Δw1 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 The Mitsui 1# side guide plate executes normal one-time short stroke action delta W1 1 time The method comprises the steps of carrying out a first treatment on the surface of the If (Bmax/2+. Times.2 is larger than or equal to W1-delta W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 When the meter is in use, the 1# side guide plate executes a single-side deviation rectifying function, namely, one-time short-stroke action delta W1 1 time On the basis of the step (1), the side guide plate 1 is opened on one side;
4) After starting the single-side deviation correcting function, the basic automation computer determines the single-side action direction of the 1# side guide plate according to the direction of the center deviation of the head part of the strip steel, when Y is more than 0, the 1# side guide plate executes 1 time of short stroke action and simultaneously the 1# side guide plate operates the single-side opening delta W of the side guide plate ws ＝(Bmax/2+Y)×2-(W1-ΔW1 1 time ) +β, β is the artificially given margin; when Y < 0, the 1# side guide performs 1 short stroke operation while the 1# side guide is transmitting the single side opening amount Delta Wds = (Bmax/2+Y) ×2- (W1-DeltaW 1) 1 time ) +β, β is the artificially given margin; y=0, the one-side opening function is not performed;
5) Computer tracking strip steel head position reaching 2# side guide plate straight line segment M 2 In meter time, the 2# side guide plate is started for one short stroke delta W2 1 time At the same time, the single-side opening amount delta Wws or delta Wds of the No. 1 side guide plate is zeroed.
As an improvement of the present invention, the length of the straight line segment of the side guide plate x=1# in the step 1) is l1+1# and the distance from the end of the side guide plate x=1# to the front end of the straight line segment of the side guide plate 2# is L2.
As an improvement of the invention, the judgment of the direction of the center offset of the steel head in the step 4) is as follows: when the maximum value Y of the head center offset is a positive value, the head offset driving side is indicated; when the head center shift maximum value Y is a negative value, the head shift operation side is indicated.
Compared with the prior art, the invention has the following advantages that the technical scheme can obviously reduce the phenomenon that the steel feeding of the No. 2 coiling machine is blocked due to head camber; 2) According to the technical scheme, since the production line is implemented in Mei Gang 1780, the number 2 coiler blocked scrap steel is reduced from 1.5 on average per month before implementation to 0.25 on average per month after implementation due to the camber of the head of the strip steel, and the economic benefit is estimated to be about 14 ten thousand yuan/month; 3) Social benefits, this technical scheme has reduced the frequency of handling the steel scrap to reduce personnel's unusual operation risk, also reduced intensity of labour simultaneously.
Drawings
FIG. 1 is a line layout;
FIG. 2 is a schematic diagram showing the position of the strip steel head straight through the 1# side guide plate and into the 2# side guide plate;
FIG. 3 is a schematic diagram showing the position of the strip steel head passing through the No. 1 side guide plate and entering the No. 2 side guide plate when the strip steel head is bent by a sickle;
fig. 4 is a flowchart of the present embodiment.
The specific embodiment is as follows:
in order to enhance the understanding of the present invention, the present embodiment will be described in detail with reference to the accompanying drawings.
Example 1: referring to fig. 1-4, a method of rectifying a coiler side guide, the method comprising the steps of: 1) The coiling inlet is provided with a width measuring instrument, and when the head of the strip steel enters the 1# side guide plate, the maximum value Bmax of the width of the head is measured by the maximum value Y of the center offset of the strip steel 0-X meters measured by the coiling inlet;
2) The entrance of the coiling machine is provided with a pyrometer for correcting the head position of the strip steel which is tracked and calculated by a computer;
3) The process control computer sets a 1# side guide head preset opening degree W1, sets a 2# side guide head preset opening degree W2 (normally w1=w2), and if (Bmax/2 + |y|) x 2 < W1- Δw1 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 The Mitsui 1# side guide plate executes normal one-time short stroke action delta W1 1 time The method comprises the steps of carrying out a first treatment on the surface of the If (Bmax/2+. Times.2 is larger than or equal to W1-delta W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 When the meter is in use, the 1# side guide plate executes a single-side deviation rectifying function, namely, one-time short-stroke action delta W1 1 time On the basis of the step (1), the side guide plate 1 is opened on one side;
4) After starting the single-side deviation correcting function, the basic automation computer determines the single-side action direction of the 1# side guide plate according to the direction of the center deviation of the head part of the strip steel, when Y is more than 0, the 1# side guide plate executes 1 time of short stroke action and simultaneously the 1# side guide plate operates the single-side opening delta W of the side guide plate ws ＝(Bmax/2+Y)×2-(W1-ΔW1 1 time ) +β, β is the artificially given margin; when Y < 0, the 1# side guide performs 1 short stroke operation while the 1# side guide is transmitting the single side opening amount Delta Wds = (Bmax/2+Y) ×2- (W1-DeltaW 1) 1 time ) +β, β is the artificially given margin; y=0, the one-side opening function is not performed;
5) Computer tracking strip steel head position reaching 2# side guide plate straight line segment M 2 In meter time, the 2# side guide plate is started for one short stroke delta W2 1 time At the same time, the single-side opening amount delta Wws or delta Wds of the No. 1 side guide plate is zeroed.
The length of the straight line segment of the side guide plate on the X=1# side in the step 1) is L1+1# and the distance from the tail end of the straight line segment of the side guide plate on the 2# side is L2. The judgment of the direction of the center offset of the steel-in-step 4) is as follows: when the maximum value Y of the head center offset is a positive value, the head offset driving side is indicated; when the head center shift maximum value Y is a negative value, the head shift operation side is indicated.
Application examples:
the embodiment is applied to a Mei Gang 1780 hot rolling coiler, as shown in fig. 4, and is a coiler side guide correction method, which comprises the following steps:
1. the coiling inlet width gauge is arranged at the inlet position of the side guide plate on the 1# side of the laminar flow outlet, the 1780 coiling inlet width gauge of the coiling machine in the embodiment is arranged at the position of 25086mm in front of the straight line section of the side guide plate on the 1# side, and the coiling inlet height Wen Jian is arranged at the position of 20135mm in front of the straight line section of the side guide plate on the 1# side;
2. 1780 in this example the coiler 1# side guide straight line length l1=7217 mm, the 1# side guide tip to 2# side guide straight line front distance l2=2968 mm;
3. the preset opening W1 (or W2) of the head of the 1# (or 2 #) side guide plate set by a process control computer is formed by the hot width B of strip steel and one-time short stroke delta W 1 time Secondary short stroke Δw 2 times Head actual ultra-wide delta B, L1 margin W L1 L2 margin W L2 The invention relates to a correction technique of a coiler side guide plate, which comprises the following parameters: strip steel thermal width b=strip steel theoretical cold width x (1+11 mill), one-time short stroke Δw 1 time =90 mm, twice short stroke Δw 2 times The actual ultra-wide quantity of the head delta B=the ultra-wide quantity of the hot width measured by the finish rolling outlet width gauge, L1 allowance W L1 =15 to 35mm, remainder of l 2W L2 Operator intervention wg=0 to 20mm;
4. when the strip steel head passes through the coiling inlet width measuring instrument, the coiling inlet width measuring instrument measures the maximum value Y of the center offset of the strip steel head 0-10185 mm (X=L1+L2=7217+2968=10185 mm) and the maximum value Bmax of the head width, and data are transmitted to the basic automation computer;
5. the basic automation computer compares (Bmax/2+/-Y|) with (2 < W1-delta W1) according to the maximum value Y of the central offset of the strip steel head and the maximum value Bmax of the head width 1 time "two values of the size, when (Bmax/2+. Times.2 < W1-. DELTA.W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 The Mitsui 1# side guide plate executes normal one-time short stroke action delta W1 1 time The method comprises the steps of carrying out a first treatment on the surface of the When (Bmax/2+. Times.2 is equal to or larger than W1-delta W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 When the meter is in use, the 1# side guide plate executes a single-side deviation rectifying function, namely, one-time short-stroke action delta W1 1 time On the basis of the above, the 1# side guide plate is opened on one side, and 1 in the embodiment780, when the strip steel head of the coiling machine reaches the straight line section 133 m of the No. 1 side guide plate, the No. 1 side guide plate starts to execute normal one-time short stroke action;
the specific single-side opening direction of the No. 1 side guide plate is determined by the deviation of the head of the strip steel, and the 1780 coiler basic automation computer in the embodiment defines the maximum value Y of the center deviation of the head of the strip steel when the head of the strip steel deviates from the transmission side as a positive value, and defines the maximum value Y of the center deviation of the head of the strip steel when the head of the strip steel deviates from the transmission side as a negative value. When Y > 0, the 1# side guide performs 1 short stroke operation while the 1# side guide operates the side guide by a single-side opening amount Delta Wws = (Bmax/2+Y) ×2- (W1-DeltaW 1) 1 time ) +β, β is the artificially given margin; when Y < 0, the 1# side guide performs 1 short stroke operation while the 1# side guide is transmitting the single side opening amount Delta Wds = (Bmax/2+Y) ×2- (W1-DeltaW 1) 1 time ) +β, β is the artificially given margin; when y=0, the single-side opening function is not executed, and the beta value of the 1780 coiling machine is 0-20 mm;
7. computer tracking strip steel head position reaching 2# side guide plate straight line segment M 2 In meter time, the 2# side guide plate is started for one short stroke delta W2 1 time At the same time, the single-side opening amount delta Wws or delta Wds of the No. 1 side guide plate is zeroed, and the 1780 coiling machine M in the embodiment 2 =145 meters.
It should be noted that the above-mentioned embodiments are not intended to limit the scope of the present invention, and equivalent changes or substitutions made on the basis of the above-mentioned technical solutions fall within the scope of the present invention as defined in the claims.
Claims (3)
1. The rectifying method for the side guide plate of the coiling machine is characterized by comprising the following steps of: 1) The coiling inlet is provided with a width measuring instrument, and when the head of the strip steel enters the 1# side guide plate, the maximum value Bmax of the width of the head is measured by the maximum value Y of the center offset of the strip steel 0-X meters measured by the coiling inlet;
2) The entrance of the coiling machine is provided with a pyrometer for correcting the head position of the strip steel which is tracked and calculated by a computer;
3) The process control computer sets a preset opening W1 of the head of the side guide plate # 1, sets a preset opening W2 of the head of the side guide plate # 2,W1=W2, if (Bmax/2+. Times.2 < W1-. DELTA.W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 The Mitsui 1# side guide plate executes normal one-time short stroke action delta W1 1 time The method comprises the steps of carrying out a first treatment on the surface of the If (Bmax/2+. Times.2 is larger than or equal to W1-delta W1) 1 time The head of the strip steel reaches the straight line segment M of the 1# side guide plate 1 When the meter is in use, the 1# side guide plate executes a single-side deviation rectifying function, namely, one-time short-stroke action delta W1 1 time On the basis of the step (1), the side guide plate 1 is opened on one side;
4) After starting the single-side deviation correcting function, the basic automation computer determines the single-side action direction of the 1# side guide plate according to the direction of the center deviation of the head part of the strip steel, when Y is more than 0, the 1# side guide plate executes 1 time of short stroke action and simultaneously the 1# side guide plate operates the single-side opening delta W of the side guide plate ws ＝(Bmax/2+Y)×2-(W1-ΔW1 1 time ) +β, β is the artificially given margin; when Y < 0, the 1# side guide plate performs 1 short stroke operation and simultaneously the 1# side guide plate drives the side guide plate to open by a single side delta W ds ＝(Bmax/2+Y)×2-(W1-ΔW1 1 time ) +β, β is the artificially given margin; y=0, the one-side opening function is not performed;
5) Computer tracking strip steel head position reaching 2# side guide plate straight line segment M 2 In meter time, the 2# side guide plate is started for one short stroke delta W2 1 time At the same time, the single-side opening delta W of the No. 1 side guide plate ws Or DeltaW ds And (5) returning to zero.
2. The method of rectifying a coiler side guide according to claim 1, characterized in that the x=1# side guide straight line segment length l1+1# side guide end to 2# side guide straight line segment front end distance L2 in said step 1).
3. The method for rectifying a coiler side guide according to claim 2, wherein the direction of the center shift of the strip steel head in the step 4) is judged as follows: when the maximum value Y of the head center offset is a positive value, the head offset driving side is indicated; when the head center shift maximum value Y is a negative value, the head shift operation side is indicated.
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| CN201710509829.8A CN109127733B (en) | 2017-06-28 | 2017-06-28 | Rectifying method for side guide plate of coiling machine |
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| CN110064660B (en) * | 2019-04-09 | 2020-07-17 | 鞍钢股份有限公司 | Method for controlling tower shape of steel coil |
| CN110586665B (en) * | 2019-08-09 | 2020-12-22 | 北京科技大学设计研究院有限公司 | Control method for clamping starting time of guide plates at rough rolling inlet and outlet sides |
| CN111922120A (en) * | 2020-07-09 | 2020-11-13 | 首钢京唐钢铁联合有限责任公司 | Method for preventing side guide plate of coiling machine from clamping steel |
| CN112528225B (en) * | 2020-10-30 | 2024-02-23 | 北京科技大学 | Method for evaluating precision of side guide plate of hot-rolled strip steel rolling mill |
| CN114345984B (en) * | 2021-12-31 | 2024-05-14 | 张家港宏昌钢板有限公司 | Method and device capable of automatically adjusting inclination angle of side guide plate of coiling machine |
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