CN114345952B - Corrosion-resistant low-carbon steel temperature control rolling process - Google Patents
Corrosion-resistant low-carbon steel temperature control rolling process Download PDFInfo
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- CN114345952B CN114345952B CN202210005357.3A CN202210005357A CN114345952B CN 114345952 B CN114345952 B CN 114345952B CN 202210005357 A CN202210005357 A CN 202210005357A CN 114345952 B CN114345952 B CN 114345952B
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- 238000005096 rolling process Methods 0.000 title claims abstract description 461
- 229910001209 Low-carbon steel Inorganic materials 0.000 title claims abstract description 229
- 230000007797 corrosion Effects 0.000 title claims abstract description 20
- 238000005260 corrosion Methods 0.000 title claims abstract description 20
- 230000000007 visual effect Effects 0.000 claims description 53
- 238000001514 detection method Methods 0.000 claims description 27
- 230000009467 reduction Effects 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 15
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 101100356682 Caenorhabditis elegans rho-1 gene Proteins 0.000 claims description 3
- 238000002360 preparation method Methods 0.000 abstract description 27
- 238000000034 method Methods 0.000 abstract description 8
- 238000005516 engineering process Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 239000011449 brick Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
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Classifications
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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
- B21B37/58—Roll-force control; Roll-gap control
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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
- B21B37/46—Roll speed or drive motor control
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
- B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
Abstract
The invention relates to a corrosion-resistant low-carbon steel temperature control rolling process, wherein when a control panel controls a rough rolling device to pre-rough-roll a dephosphorized low-carbon steel plate, the control panel controls a rough rolling temperature detector to detect the actual temperature of the low-carbon steel plate and adjusts the temperature of the low-carbon steel plate to a corresponding value according to the comparison between the actual temperature of the low-carbon steel plate and a preset temperature; when the rough rolling device carries out formal rough rolling on the dephosphorized low-carbon steel plate, the control panel adjusts the power of each rough rolling roller group in the rough rolling device to a corresponding value according to the thickness of the low-carbon steel plate; the method can effectively avoid the condition that the low-carbon steel plate cannot be rolled due to the fact that the temperature is not in accordance with the standard in the rough rolling process, and further improves the low-carbon steel preparation efficiency.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a corrosion-resistant low-carbon steel temperature control rolling process.
Background
Rolling is a metal working process, which is a press working method in which a metal blank is passed through a gap between a pair of rotating rolls, and the cross section of the material is reduced by compression of the rolls, thereby increasing the length.
At present, the internationally common rolling technology comprises a continuous rolling technology and a controlled rolling technology, wherein the continuous rolling technology enables the low-carbon steel plate to be continuously and uninterruptedly rolled to the target thickness from the last procedure to the next procedure, and therefore, the method has the characteristics of high efficiency, low energy consumption, convenience in control and the like; however, the continuous rolling process has the defects of difficult control of an intermediate program, lower flexibility, difficult realization of microstructure control and the like.
However, in the low-carbon steel rolling process in the prior art, the power of the rolls in each roll group cannot be flexibly adjusted, so that when a single-group roll fails, the subsequent roll group cannot effectively roll a low-carbon steel plate, so that the deviation between the actual size of the low-carbon steel plate after rough rolling and the preset size is larger, and meanwhile, the plate shape and the surface quality of the low-carbon steel plate in the rolling process cannot be effectively monitored and treated in the existing low-carbon steel rolling forming process, so that the quality of the prepared low-carbon steel plate is low, and the preparation efficiency of the low-carbon steel plate is low.
Disclosure of Invention
Therefore, the invention provides a corrosion-resistant low-carbon steel temperature control rolling process, which is used for solving the problem that the low-carbon steel preparation efficiency is low because the plate shape and the surface quality of the low-carbon steel in the rolling process cannot be effectively monitored and treated in the prior art.
In order to achieve the above object, the present invention provides a corrosion-resistant low carbon steel temperature control rolling process, comprising:
step S1, conveying a low-carbon steel plate to a heating device, heating the low-carbon steel plate to a preset temperature by the heating device according to the initial thickness of the low-carbon steel plate, conveying the low-carbon steel plate to a dephosphorization device for preliminary dephosphorization, and conveying the low-carbon steel plate to a rough rolling device after the removal is completed;
step s2, when the roughing device performs rough rolling on the dephosphorized low-carbon steel plate, the control panel controls a rough rolling visual detector in the roughing device to detect the actual thickness of the low-carbon steel plate after passing through a single rough rolling roller group and to adjust the power of a subsequent rough rolling roller group according to the detection result, if the power of the subsequent rough rolling roller group is judged to be adjusted, the control panel adjusts the power of the subsequent rough rolling roller group according to the difference value between the actual thickness of the low-carbon steel plate and the preset thickness, and after the adjustment is completed, the control panel controls the rough rolling visual detector to detect the actual thickness of the single rough rolling roller group after adjustment and judges whether the interval between the rough rolling roller groups is adjusted or judges whether the rough rolling roller group has faults according to the thickness;
Step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device, and the rough rolling dephosphorization device carries out temperature and dephosphorization on the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device;
step S4, when the finish rolling device carries out finish rolling on the low-carbon steel plate, the control panel conveys the low-carbon steel plate to the finish rolling device, after initial finish rolling is started, the control panel controls the finish rolling visual detector to detect special cracks on the low-carbon steel plate after a single finish rolling roll group, the power of a subsequent finish rolling roll group is adjusted to a corresponding value according to crack characteristics, the subsequent finish rolling roll group carries out finish rolling with the adjusted power, the control panel detects a roll rotation speed ratio through the finish rolling visual detector to judge whether the subsequent finish rolling roll group operates normally, and if the roll rotation speed ratio of the subsequent finish rolling roll group accords with a standard control panel control pressure detector, the rolling pressure is detected and the rolling pressure is compared with a maximum pressure value to judge whether the subsequent finish rolling roll group fails;
further, in the S2, when the rough rolling device performs the formal rough rolling of the dephosphorized low carbon steel plate, the control panel determines the preset thickness H0 of the low carbon steel plate passing through the group by the initial power V of the rough rolling device; when the low-carbon steel plate passes through the rough rolling device, the control panel controls a rough rolling visual detector in the rough rolling device to detect the actual thickness H of the low-carbon steel plate after passing through the rough rolling roller group, compares H with H0 and judges whether the thickness of the rolled low-carbon steel plate meets the standard according to the comparison result;
If H is more than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too high and adjusts the power of the following rough rolling roller group.
If H=H20, the control panel judges that the thickness of the rough rolled low-carbon steel plate meets the standard;
if H is less than H0, the control panel judges that the thickness of the rough rolled low carbon steel plate is too low and adjusts the power of the roller group of the rough rolling.
Further, in the step S2, when H > H0, the control panel determines that the thickness of the low carbon steel sheet is too high, the control panel calculates a thickness difference Δh and adjusts the power V of the following rough rolling roller group according to Δh, setting Δha=h—h0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first rough rolling roll group power increase adjustment coefficient rho 1, a second rough rolling roll group power increase adjustment coefficient rho 2 and a third rough rolling roll group power increase adjustment coefficient rho 3; wherein DeltaH 1 < DeltaH2, 0.3 < ρ1 < ρ2 < ρ3 < 0.7;
when delta H is less than or equal to delta H1, the control panel uses the power increase adjustment coefficient beta 1 of the first rough rolling device to adjust the power V of the subsequent rough rolling device;
when delta H is less than delta H2, the control panel uses the power increase adjustment coefficient beta 2 of the second rough rolling device to adjust the power V of the subsequent rough rolling device;
When delta H > -delta H2, the control panel uses the third roughing device power increase adjustment coefficient beta 3 to adjust the subsequent roughing device power V;
when the control panel increases the power V of the next rough rolling mill by using the kth rough rolling mill power increase adjustment coefficient ρk, k=1, 2,3 is set, the adjusted power of the next rough rolling mill group is denoted as V ', and V' =v×ρk is set.
Further, in step S2, when H < H0, the control panel determines that the thickness of the low carbon steel sheet is too low, the control panel calculates a thickness difference Δh and adjusts the power V of the subsequent rough rolling roll group according to Δh, setting Δha=h0-H; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first rough rolling roll group power reduction adjustment coefficient beta 1, a second rough rolling roll group power reduction adjustment coefficient beta 2 and a third rough rolling roll group power reduction adjustment coefficient beta 3; wherein DeltaH1 < DeltaH2, 0.4 < beta 1 < beta 2 < beta 3 < 0.9;
when delta H is less than or equal to delta H1, the control panel uses a third rough rolling device power reduction adjustment coefficient beta 1 to adjust the subsequent rough rolling device power V;
when delta H is less than delta H2, the control panel uses the second rough rolling device power reduction adjustment coefficient beta 2 to adjust the subsequent rough rolling device power V;
When delta H > -delta H2, the control panel adjusts the subsequent roughing device power V using a first roughing device power adjustment reduction coefficient beta 3;
when the control panel uses the j-th rough rolling roll device power reduction adjustment coefficient beta j to reduce the subsequent rough rolling device power V, j=1, 2 and 3 are set, the adjusted subsequent rough rolling roll group power is recorded as V ', and V' =V multiplied by beta j is set.
Further, in step S2, the control panel determines the preset thickness Hb of the mild steel sheet after passing through the group by the roughing device power V; when the control panel controls the following rough rolling roller group to roll the low-carbon steel plate with increased power, the control panel controls the visual detection device to detect the thickness of the low-carbon steel plate and marks the thickness as H ', and the control panel compares H' with H0 to judge whether the distance between the following rough rolling roller group is adjusted;
if H' =hb, the control panel determines that the following rough rolling roll group pitch is not adjusted and controls the rough rolling visual detection device to detect in real time;
if H '> Hb and H' < H, the control panel determines that the gap between the following rough rolling roll sets needs to be adjusted.
Further, in step S2, when the control panel determines that the gap between the following rough rolling roller sets needs to be adjusted, the control panel calculates a difference Δh ' between H ' and H and adjusts the gap J between the following rough rolling roller sets according to Δh ', and sets Δh ' =h-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H'2, a first spacing adjustment coefficient omega 1, a second spacing adjustment coefficient omega 2 and a third spacing adjustment coefficient omega 3, wherein delta H '1 < [ delta ] H'2,0.4 ] < omega 1 ] < omega 2 ] < omega 3 < 0.7;
When delta H 'is less than or equal to delta H'1, the control panel uses a first spacing adjustment coefficient omega 1 to adjust the spacing J between the following rough rolling roller groups;
when DeltaH '1 < DeltaH' 2, the control panel uses a second spacing adjustment coefficient omega 2 to adjust the spacing J between the following rough rolling roll groups;
when DeltaH '> DeltaH' 2, the control panel uses a third pitch adjustment coefficient omega 3 to adjust the pitch J between the following roughing roll sets;
when the central control module uses the h spacing adjustment coefficient ωh to adjust the spacing J between the following rough rolling roller groups, setting h=1, 2,3, and recording the adjusted spacing between the rough rolling roller groups as J ', and setting J' =j×ωh.
Further, in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted spacing; when the control panel controls the subsequent rough rolling roller group to roll the low-carbon steel plate at the adjusted interval J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after a single rough rolling roller group and compares the H ' with Hc to judge whether the rough rolling roller group has faults or not;
If H "=hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detection device to detect in real time;
if H' > Hc, the control panel judges that the rough roll group fails and stops to give an alarm.
Further, in step S4, the control panel is further provided with a single finish rolling crack feature L0; when the finish rolling device performs finish rolling on the low-carbon steel plate, the control panel controls the finish rolling visual detector to detect crack characteristics L on the low-carbon steel plate after a single finish rolling roller group and judges whether the power of a subsequent finish rolling roller group is adjusted according to the comparison between L and L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller group power adjustment coefficient gamma 1, a second subsequent finish rolling roller group power adjustment coefficient gamma 2 and a third subsequent finish rolling roller group power adjustment coefficient gamma 3; wherein L1 is more than L2 and less than L3, and 0.5 is more than gamma 1 and less than gamma 2 and less than gamma 3 and less than 0.9;
when L is less than or equal to L1, the control panel judges that the power of the subsequent finish rolling device is not regulated;
when L1 is more than L and less than or equal to L2, the control panel uses a power adjustment coefficient gamma 1 of a first subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device;
When L2 is more than L and less than or equal to L3, the control panel uses a power adjustment coefficient gamma 2 of a second subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device;
when L is more than L3, the control panel uses a third subsequent finishing mill roller device power adjustment coefficient gamma 3 to adjust the subsequent finishing mill device power K;
when the control panel adjusts the subsequent finishing mill roll group power K using the nth subsequent finishing mill roll group power adjustment coefficient γn, n=1, 2,3 is set, and the adjusted subsequent finishing mill roll group power is noted as K' =k×γn.
Further, in step S4, the control panel is provided with a preset roll rotation speed ratio Z0; when the control panel controls the subsequent finish rolling roller group to finish rolling with the adjusted power K', the control panel detects the actual rotation speed ratio Z and Z0 of the roller group of the subsequent finish rolling device through the finish rolling visual detector to judge whether the adjusted power K is qualified or not;
if Z is less than or equal to Z0, the control panel judges that the subsequent finish rolling roller group operates normally and detects rolling pressure;
and if Z is more than Z0, the control panel judges that the subsequent finish rolling roller group has fault shutdown and sends out fault alarm prompt.
Further, in step S4, the control panel is provided with a maximum rolling pressure Ymax; when Z=Z0, the control panel judges that the roller group of the subsequent finish rolling device operates normally, the control panel controls the pressure detector to detect the actual rolling pressure Y of the roller group of the finish rolling device and judges whether the roller group of the subsequent finish rolling device has faults according to the comparison of Y and Y0;
If Y is less than or equal to Ymax, the control panel judges that the subsequent finish rolling roller group operates normally;
and if Y is larger than Ymax, the control panel judges that the follow-up finish rolling roller group has fault shutdown and sends out fault alarm prompt.
Compared with the prior art, the method has the advantages that after the initial rough rolling of the low-carbon steel plate is finished, the control panel controls the rough rolling visual detection device to detect the thickness of the low-carbon steel plate and judges whether the rotating speed of the rough rolling roller device or the interval between the rolling roller groups is regulated according to the detection result, so that the fact that the thickness of the low-carbon steel plate in the rough rolling process reaches a specified size can be effectively ensured, meanwhile, when the initial finish rolling of the low-carbon steel plate is finished, the control panel controls the finish rolling visual detection device to detect crack characteristics on the low-carbon steel plate and regulate the rotating speed of the finish rolling roller group according to the detection result, after the regulation is finished, the control panel controls the finish rolling visual detection device to detect the rotating speed ratio of the rolling roller groups and compares the actual rotating speed ratio with the preset rotating speed ratio to judge whether the regulated power is qualified or not, whether the finish rolling roller device fails or not can be effectively avoided, the fact that the low-carbon steel plate cannot meet the standard due to mechanical failure causes, the low-carbon steel plate preparation efficiency is reduced, and the low-carbon steel plate preparation efficiency is further improved.
Further, the control panel controls the rough rolling visual detector to detect the actual thickness of the low-carbon steel plate rolled by the single rough rolling roller group in the formal rough rolling process and judges whether to adjust the subsequent rough rolling device according to the actual thickness of the low-carbon steel plate, so that the problem that the low-carbon steel plate cannot reach the standard in the subsequent rolling process due to the fact that the actual thickness of the low-carbon steel plate does not meet the standard can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Further, when the control panel judges that the thickness of the low-carbon steel plate subjected to rough rolling does not meet the standard, the control panel calculates a thickness difference delta H through H and H0 and adjusts the power V of the subsequent rough rolling device according to the delta H; according to the invention, when the control panel judges that the thickness of the rough rolled low-carbon steel plate is unqualified, the control panel calculates the thickness difference between the actual thickness and the preset thickness and adjusts the power of the rough rolling device according to the thickness difference, so that the power of the rough rolling device can be effectively ensured not to deviate, the rolling efficiency of the low-carbon steel plate is further ensured, and the preparation efficiency of the low-carbon steel plate is further improved.
Further, when the control panel controls the following rough roll group to roll the low-carbon steel plate with increased power, the control panel controls the visual detection device to detect the thickness of the low-carbon steel plate and marks as H ', and the control panel compares H' with H0 to judge whether the distance between the following rough roll group and the following rough roll group is adjusted; according to the invention, when the control panel controls the following rough rolling roller groups to roll the low-carbon steel plate with increased power, the control panel controls the rough rolling visual detection of the low-carbon steel plate to adjust whether the power of the rough rolling roller device is qualified or not, and meanwhile, when the control panel judges that the power of the rough rolling roller groups is unqualified, the control panel judges that the distance between the rough rolling roller groups is adjusted, so that the problem that the power of the adjusted rough rolling roller device cannot enable the thickness of the low-carbon steel plate to reach the preset standard brick can be effectively avoided, and meanwhile, the control panel controls the rough rolling visual detection of the low-carbon steel plate to adjust the thickness of the low-carbon steel plate to roll the power of the rough rolling roller device, so that the adjustment accuracy can be effectively improved, and the low-carbon steel preparation efficiency is further improved.
Further, when the control panel judges that the distance between the following rough rolling roller groups needs to be adjusted, the control panel calculates the difference delta H ' between H ' and H and adjusts the distance J between the following rough rolling roller groups according to delta H ', when the control panel judges that the distance between the following rough rolling roller groups is adjusted, the control panel calculates the difference between the actual thickness after adjusting the power of the rough rolling roller device and the preset thickness of the low-carbon steel plate and adjusts the distance between the following rough rolling roller groups according to the difference, so that the accuracy of the rolling thickness of the low-carbon steel plate can be effectively ensured, and meanwhile, the low-carbon steel preparation efficiency is further improved.
Further, when the control panel controls the subsequent rough rolling roller group to roll the low-carbon steel plate at the adjusted interval J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares the H ' with the Hc to judge whether the rough rolling roller group has faults or not; according to the invention, the rough rolling visual detection device is controlled by the control panel to detect so as to adjust the thickness of the low-carbon steel plate rolled by the interval between the following rough rolling roller groups, the control panel compares the thickness with the preset thickness to judge whether the thickness of the low-carbon steel plate is qualified or not, so that low-carbon steel plate preparation efficiency caused by disqualification of the adjusted low-carbon steel plate thickness can be effectively avoided, meanwhile, the control panel indirectly judges whether the rough rolling roller groups are faulty or not by comparing the thickness with the preset thickness, low-carbon steel preparation efficiency caused by faults of the rough rolling roller groups can be effectively avoided, and low-carbon steel preparation efficiency is further improved.
Further, after the control panel conveys the low-carbon steel plate to the roller group of the finish rolling device to start preliminary finish rolling, the control panel controls the finish rolling visual detector to detect crack characteristics L on the low-carbon steel plate after a single finish rolling roller group and judges whether to adjust the power of a follow-up finish rolling device according to the comparison of L and L0; according to the invention, the control panel is used for controlling the finish rolling visual detector to detect the crack characteristics of the low-carbon steel plate after a single finish rolling roller group, so that the condition that the low-carbon steel plate cannot reach the standard after being rolled due to the fact that the power of a finish rolling device is not in accordance with the standard in the finish rolling process can be effectively ensured, and the preparation efficiency of the low-carbon steel plate is further improved.
Further, when the control panel controls the subsequent finish rolling device to finish rolling with the adjusted power K', the control panel judges whether the finish rolling device operates normally or not by detecting the actual rotation speed ratio Z and Z0 of the roller through finish rolling visual detection; according to the invention, by detecting the roll rotation speed ratio of the power of the finish rolling device after adjustment and judging whether the finish rolling device fails according to the rotation speed ratio, the problem that the low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Further, when z=z0, the control panel determines that the finishing mill is operating normally, the control panel controls the pressure and detects the actual rolling pressure Y of the finishing mill and determines whether the finishing mill is malfunctioning according to the comparison of Y and Y0; the invention controls the pressure through the control panel, detects the actual rolling pressure of the finish rolling device and judges whether the finish rolling device has faults according to the actual rolling pressure of the finish rolling device; can effectively avoid the problem that the low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device, and further improve the preparation efficiency of the low-carbon steel plate.
Drawings
FIG. 1 is a schematic diagram of a corrosion-resistant low carbon steel temperature-controlled rolling process according to the present invention;
FIG. 2 is a flow chart of a corrosion-resistant low carbon steel temperature control rolling process according to the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, a schematic structural diagram of a temperature-controlled rolling process for corrosion-resistant low-carbon steel according to the present invention includes:
The heating device 1 is used for preheating the low-carbon steel plate to be rolled;
the dephosphorization device 2 is connected with the rest of the heating devices and is used for dephosphorizing the preheated low-carbon steel plate;
a rough rolling device 3 connected to the dephosphorization device 1, for receiving the dephosphorized low-carbon steel plate outputted from the dephosphorization device 2 and rough rolling the low-carbon steel plate, wherein the rough rolling device 3 comprises a plurality of rough rolling roller groups 31, and a rough rolling visual detector 5 for detecting the thickness of the rough rolled low-carbon steel plate is respectively arranged at the downstream of each rough rolling roller group 31; the rough rolling device 3 is also provided with a rough rolling heating device 3 for carrying out secondary heating on the continuous casting plate; a rough rolling temperature detector 6 is also arranged in the rough rolling device 3 and is used for detecting the actual temperature of the low-carbon steel plate in the rough rolling device 3;
a rough rolling dephosphorization device 21 connected with the rough rolling device 3 for dephosphorizing and preserving the low carbon steel plate output by the rough rolling device 3;
a finishing mill 4 connected to the rough rolling dephosphorization apparatus 21 for finishing the low carbon steel sheet outputted from the rough rolling dephosphorization apparatus 21; the finishing mill 4 comprises a plurality of finishing mill roll groups 41 with adjustable roll spacing, and finishing mill visual detectors 51 for detecting the shape and the surface of a finished intermediate blank are respectively arranged at the downstream of each finishing mill roll group 41; the finishing mill device 4 is also provided with a finishing mill temperature detector 61 for detecting the actual temperature of the low-carbon steel plate in the finishing mill device 4; the finishing mill device 4 is also provided with a pressure detector 7 for detecting the rolling pressure of the low-carbon steel plate;
Control panels (not shown) respectively connected to the heating device 1, each of the rough rolling bar groups 31, each of the rough rolling visual sensors 5, the rough rolling heating device 32, each of the finish rolling roller groups 41, the pressure detectors 7, each of the finish rolling visual detectors 51 and the finish rolling temperature detectors 61 for detecting the dimensional parameters of the mild steel sheet in real time during rolling of the mild steel sheet and adjusting the operation parameters of the corresponding components when the parameters do not meet the standards.
Referring to fig. 2, a flow chart of the corrosion-resistant low-carbon steel temperature-controlled rolling process according to the present invention includes:
step S1, conveying a low-carbon steel plate to a heating device 1, heating the low-carbon steel plate to a preset temperature according to the initial thickness of the low-carbon steel plate by the heating device 1, conveying the low-carbon steel plate to a dephosphorization device 2 for preliminary dephosphorization, and conveying the low-carbon steel plate to a rough rolling device 3 after the removal is completed;
step s2, when the roughing device 3 roughs the dephosphorized low-carbon steel plate, the control panel controls the roughing vision detector 5 in the roughing device 3 to detect the actual thickness of the low-carbon steel plate passing through the single roughing roller group 31 and to adjust the power of the subsequent roughing roller group 31 according to the detection result, if the adjustment of the power of the subsequent roughing roller group 31 is determined, the control panel adjusts the power of the subsequent roughing roller group 31 according to the difference between the actual thickness and the preset thickness of the low-carbon steel plate, after the adjustment is completed, the control panel controls the roughing vision detector 5 to detect the actual thickness of the single roughing roller group 31 after the adjustment and to determine whether the adjustment of the spacing between the roughing roller groups 31 is performed or whether the roughing roller group 31 has faults according to the thickness;
Step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device 212, and the rough rolling dephosphorization device 212 carries out temperature and dephosphorization on the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device 4;
in step S4, when the finishing device 4 finishes the mild steel sheet, the control panel controls the finishing vision detector 51 to detect the crack characteristics on the mild steel sheet after the finishing device 4 starts to finish the mild steel sheet, and adjusts the power of the subsequent finishing roll set 41 to the corresponding value according to the crack characteristics, and the control panel detects the roll rotation speed ratio by the finishing vision detector 51 to determine whether the subsequent finishing roll set 41 operates normally, if the roll rotation speed ratio of the subsequent finishing roll set 41 meets the standard control panel control pressure detector 7 to detect the rolling pressure and compares the rolling pressure with the maximum pressure value to determine whether the subsequent finishing roll set 41 fails.
According to the invention, after the initial rough rolling of the low-carbon steel plate is finished, the control panel controls the rough rolling visual detection device to detect the thickness of the low-carbon steel plate and judges whether the rotation speed of the rough rolling roller device or the interval between roller groups is regulated according to the detection result, so that the low-carbon steel plate thickness in the rough rolling process can be effectively ensured to reach a specified size, meanwhile, when the initial finish rolling of the low-carbon steel plate is finished, the control panel controls the finish rolling visual detection device to detect crack characteristics on the low-carbon steel plate and regulate the rotation speed of the finish rolling roller group according to the detection result, and after the regulation is finished, the control panel controls the finish rolling visual detection device to detect the rotation speed ratio of the roller groups and compares the actual rotation speed ratio with a preset rotation speed ratio to judge whether the regulated power is qualified or whether the finish rolling roller device fails, thereby effectively avoiding the fact that the low-carbon steel plate cannot meet the standard due to mechanical failure, further reducing the preparation efficiency of the low-carbon steel plate and further improving the preparation efficiency of the low-carbon steel plate.
Specifically, in the step S2, when the rough rolling device 3 performs the formal rough rolling of the dephosphorized low carbon steel plate, the control panel determines the preset thickness H0 of the low carbon steel plate passing through the group by the initial power V of the rough rolling device 3; when the low-carbon steel plate passes through the set of rough rolling devices 3, the control panel controls a rough rolling visual detector 5 in the rough rolling device 3 to detect the actual thickness H of the low-carbon steel plate passing through the rough rolling roller set 31, compares H with H0 and judges whether the thickness of the rolled low-carbon steel plate meets the standard according to the comparison result;
if H > H0, the control panel judges that the thickness of the next rough rolling low-carbon steel plate is too high and adjusts the power of the following rough rolling roller group 31.
If H=H20, the control panel judges that the thickness of the rough rolled low-carbon steel plate meets the standard;
if H < H0, the control panel judges that the thickness of the rough rolled low carbon steel sheet is too low and adjusts the power of the rough rolling roll group 31.
According to the invention, the control panel controls the rough rolling visual detector 5 to detect the actual thickness of the low-carbon steel plate rolled by the single rough rolling roller group in the formal rough rolling process and judges whether to adjust the subsequent rough rolling device 3 according to the actual thickness of the low-carbon steel plate, so that the problem that the low-carbon steel plate cannot reach the standard in the subsequent rolling process due to the fact that the actual thickness of the low-carbon steel plate does not meet the standard can be effectively avoided, and the preparation efficiency of the low-carbon steel is further improved.
Specifically, in S2, when H > H0, the control panel determines that the thickness of the next rough-rolled low-carbon steel sheet is too high, the control panel calculates a thickness difference Δh and adjusts the power V of the subsequent rough-rolled roller group 31 according to Δh, setting Δha=h—h0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a power increase adjustment coefficient rho 1 of the first rough roll set 31, a power increase adjustment coefficient rho 2 of the second rough roll set 31 and a power increase adjustment coefficient rho 3 of the third rough roll set 31; wherein DeltaH 1 < DeltaH2, 0.3 < ρ1 < ρ2 < ρ3 < 0.7;
when delta H is less than or equal to delta H1, the control panel uses the power increase adjustment coefficient beta 1 of the first rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when delta H is less than delta H2, the control panel uses the power increase adjustment coefficient beta 2 of the second rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when DeltaH > DeltaH2, the control panel uses the power increase adjustment coefficient beta 3 of the third rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when the control panel increases the power V of the following roughing device 3 by using the kth roughing roll device power increase adjustment coefficient ρk, k=1, 2,3 is set, the adjusted power of the following roughing roll set 31 is denoted as V ', and V' =v×ρk is set.
Specifically, in step S2, when H < H0, the control panel determines that the thickness of the low carbon steel sheet is too low, the control panel calculates a thickness difference Δh and adjusts the power V of the subsequent rough rolling roller group 31 according to Δh, setting Δha=h0-H; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first rough roll set 31 power reduction adjustment coefficient beta 1, a second rough roll set 31 power reduction adjustment coefficient beta 2 and a third rough roll set 31 power reduction adjustment coefficient beta 3; wherein DeltaH1 < DeltaH2, 0.4 < beta 1 < beta 2 < beta 3 < 0.9;
when delta H is less than or equal to delta H1, the control panel uses the power reduction adjustment coefficient beta 1 of the third rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when delta H is less than delta H2, the control panel uses the power reduction adjustment coefficient beta 2 of the second rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when DeltaH > DeltaH2, the control panel uses the power adjustment reduction coefficient beta 3 of the first rough rolling device 3 to adjust the power V of the subsequent rough rolling device 3;
when the control panel decreases the power V of the following rough rolling device 3 by the j-th rough rolling roll device power decrease adjustment coefficient βj, j=1, 2,3 is set, the adjusted power of the following rough rolling roll group 31 is denoted as V ', and V' =v×βj is set.
When the thickness of the rough rolling low-carbon steel plate is judged to be unqualified through the control panel, the control panel calculates the thickness difference between the actual thickness and the preset thickness and adjusts the power of the rough rolling device 3 according to the thickness difference, so that the power of the rough rolling device 3 can be effectively ensured to be adjusted without deviation, the rolling efficiency of the low-carbon steel plate is further ensured, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S2, the control panel determines the preset thickness Hb of the mild steel sheet after passing through the group by the power V of the roughing device 3; when the control panel controls the following rough rolling roller group 31 to roll the low-carbon steel plate with increased power, the control panel controls the visual detection device to detect the thickness of the low-carbon steel plate and marks as H ', and the control panel compares H' with H0 to judge whether the spacing of the following rough rolling roller group 31 is adjusted;
if H' =hb, the control panel determines that the pitch of the following rough roll roller group 31 is not adjusted and controls the rough roll visual detection device to detect in real time;
if H '> Hb and H' < H, the control panel determines that the pitch of the following rough roll set 31 is to be adjusted.
According to the invention, when the control panel controls the following rough rolling roller group 31 to roll the low-carbon steel plate with increased power, the control panel controls the rough rolling visual detection of the low-carbon steel plate to adjust whether the power of the rough rolling roller device is qualified or not, and meanwhile, when the control panel judges that the power of the rough rolling roller group 31 is unqualified, the control panel judges that the distance between the rough rolling roller groups 31 is adjusted, so that the problem that the power of the adjusted rough rolling roller device cannot enable the thickness of the low-carbon steel plate to reach the preset standard brick can be effectively avoided, and meanwhile, the control panel controls the rough rolling visual detection of the thickness of the low-carbon steel plate to adjust the power of the rough rolling roller device to roll, so that the adjustment accuracy can be effectively improved, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S2, when the control panel determines that the pitch of the following rough roll set 31 needs to be adjusted, the control panel calculates a difference Δh ' between H ' and Hb and adjusts the pitch J between the following rough roll set 31 according to Δh ', setting Δh ' =hb-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H'2, a first spacing adjustment coefficient omega 1, a second spacing adjustment coefficient omega 2 and a third spacing adjustment coefficient omega 3, wherein delta H '1 < [ delta ] H'2,0.4 ] < omega 1 ] < omega 2 ] < omega 3 < 0.7;
When DeltaH '. Ltoreq.DeltaH' 1, the control panel adjusts the pitch J between the following rough roll group 31 using a first pitch adjustment coefficient ω1;
when DeltaH '1 < DeltaH '. Ltoreq.DeltaH '2, the control panel adjusts the pitch J between the following rough roll group 31 using a second pitch adjustment coefficient ω2;
when Δh '> "Δh'2, the control panel adjusts the pitch J between the following roughing roll set 31 using a third pitch adjustment coefficient ω3;
when the central control module uses the h spacing adjustment coefficient ωh to adjust the spacing J between the following rough roll sets, h=1, 2,3 is set, the adjusted spacing between the rough roll sets 31 is denoted as J ', and J' =j×ωh is set.
When the control and judgment are performed on the adjustment of the spacing between the following rough rolling roller groups 31, the control panel calculates the difference between the actual thickness of the rough rolling roller device after power adjustment and the preset thickness of the low-carbon steel plate and adjusts the spacing between the following rough rolling roller groups 31 according to the difference, so that the accuracy of the rolling thickness of the low-carbon steel plate can be effectively ensured, and meanwhile, the preparation efficiency of the low-carbon steel plate is further improved.
Specifically, in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted spacing; when the control panel controls the following rough rolling roller group 31 to roll the low-carbon steel plate at the adjusted interval J ', the control panel controls the rough rolling visual detector 5 to detect the thickness H ' of the low-carbon steel plate after the single rough rolling roller group and compares H ' with Hc to judge whether the rough rolling roller group 31 has faults or not;
if H "=hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detection device to detect in real time;
if H' > Hc, the control panel determines that the rough roll set 31 is defective and stops to give an alarm.
According to the invention, the rough rolling visual detection device is controlled by the control panel to detect so as to adjust the thickness of the low-carbon steel plate rolled by the interval between the follow-up rough rolling roller groups 31, the control panel compares the thickness with the preset thickness to judge whether the thickness of the low-carbon steel plate is qualified or not, so that low-carbon steel preparation efficiency caused by disqualification of the thickness of the low-carbon steel plate after adjustment can be effectively avoided, meanwhile, the control panel indirectly judges whether the rough rolling roller groups 31 are faulty or not by comparing the thickness with the preset thickness, low-carbon steel preparation efficiency caused by the fault of the rough rolling roller groups 31 can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S4, the control panel is further provided with a single finish rolling crack characteristic length L0; when the finish rolling device 4 performs finish rolling on the low-carbon steel plate, the control panel controls the finish rolling visual detector 51 to detect the crack characteristic L on the low-carbon steel plate after the single finish rolling roll group 41 and judges whether to adjust the power of the follow-up finish rolling roll group 41 according to the comparison of L and L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller group 41 power adjustment coefficient gamma 1, a second subsequent finish rolling roller group 41 power adjustment coefficient gamma 2 and a third subsequent finish rolling roller group 41 power adjustment coefficient gamma 3; wherein L1 is more than L2 and less than L3, and 0.5 is more than gamma 1 and less than gamma 2 and less than gamma 3 and less than 0.9;
when L is less than or equal to L1, the control panel judges that the power of the subsequent finish rolling device 4 is not regulated;
when L1 is more than L and less than or equal to L2, the control panel uses the power adjustment coefficient gamma 1 of the first subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device 4;
when L2 is more than L and less than or equal to L3, the control panel uses a power adjustment coefficient gamma 2 of a second subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device 4;
When L is more than L3, the control panel uses a power adjustment coefficient gamma 3 of a third subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device 4;
when the control panel adjusts the power K of the subsequent finishing roll group 41 using the n-th subsequent finishing roll group 41 power adjustment coefficient γn, n=1, 2,3 is set, and the adjusted subsequent finishing roll group 41 power is noted as K' =k×γn.
According to the invention, the control panel controls the finish rolling visual detector 51 to detect the crack characteristics of the low-carbon steel plate after a single finish rolling roll group 41 during finish rolling, so that the condition that the low-carbon steel plate cannot reach the standard after rolling due to the fact that the power of the finish rolling device 4 is not in accordance with the standard during finish rolling can be effectively ensured, and the preparation efficiency of the low-carbon steel plate is further improved.
Specifically, in step S4, the control panel sets a preset roll rotation speed ratio Z0 according to the adjusted power K'; when the control panel controls the subsequent finishing mill roll group 41 to finish mill with the adjusted power K', the control panel detects the actual rotation speed ratio Z and Z0 of the rolls of the subsequent finishing mill device 4 through the finishing mill visual detector 51 to judge whether the adjusted power K is qualified or not;
if Z is less than or equal to Z0, the control panel judges that the subsequent finishing rolling roller group 41 operates normally and detects rolling pressure;
If Z > Z0, the control panel judges that the subsequent finishing mill roll group 41 has a fault stop and sends out a fault alarm prompt.
According to the invention, by detecting the roll rotation speed ratio of the power of the finish rolling device 4 after adjustment and judging whether the finish rolling device 4 fails according to the rotation speed ratio, the problem that the low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device 4 can be effectively avoided, and the low-carbon steel preparation efficiency is further improved.
Specifically, in step S4, the control panel is provided with a maximum rolling pressure Ymax; when the control panel judges that the roller group of the subsequent finishing rolling device 4 works normally, the control panel controls the pressure detector 7 to detect the actual rolling pressure Y of the roller group of the finishing rolling device 4 and judges whether the subsequent finishing rolling roller group 41 has faults according to the comparison of Y and Y0;
if Y is less than or equal to Ymax, the control panel judges that the subsequent finishing mill roll group 41 is normal in operation;
if Y > Ymax, the control panel determines that the subsequent finishing roll group 41 is failed to stop and issues a failure alarm prompt.
The invention controls the pressure through a control panel, detects the actual rolling pressure of the finish rolling device 4 and judges whether the finish rolling device 4 has faults according to the actual rolling pressure of the finish rolling device 4; can effectively avoid the problem that the low-carbon steel plate cannot be effectively rolled due to the failure of the finish rolling device 4, and further improve the low-carbon steel preparation efficiency.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A corrosion-resistant low carbon steel temperature-controlled rolling process, comprising:
step S1, conveying a low-carbon steel plate to a heating device, heating the low-carbon steel plate to a preset temperature by the heating device according to the initial thickness of the low-carbon steel plate, conveying the low-carbon steel plate to a dephosphorization device for preliminary dephosphorization, and conveying the low-carbon steel plate to a rough rolling device after the removal is completed;
Step s2, when the roughing device performs rough rolling on the dephosphorized low-carbon steel plate, the control panel controls a rough rolling visual detector in the roughing device to detect the actual thickness of the low-carbon steel plate after passing through a single rough rolling roller group and to adjust the power of a subsequent rough rolling roller group according to the detection result, if the power of the subsequent rough rolling roller group is judged to be adjusted, the control panel adjusts the power of the subsequent rough rolling roller group according to the difference value between the actual thickness of the low-carbon steel plate and the preset thickness, and after the adjustment is completed, the control panel controls the rough rolling visual detector to detect the actual thickness of the single rough rolling roller group after adjustment and judges whether the interval between the rough rolling roller groups is adjusted or judges whether the rough rolling roller group has faults according to the thickness;
step S3, when the control panel judges that rough rolling is finished, the control panel conveys the low-carbon steel plate to a rough rolling dephosphorization device, and the rough rolling dephosphorization device carries out temperature and dephosphorization on the low-carbon steel plate and then conveys the low-carbon steel plate to a finish rolling device;
and S4, when the finish rolling device carries out finish rolling on the low-carbon steel plate, the control panel conveys the low-carbon steel plate to the finish rolling device, after the finish rolling device starts preliminary finish rolling, the control panel controls the finish rolling visual detector to detect special cracks on the low-carbon steel plate after a single finish rolling roll group and adjusts the power of a follow-up finish rolling roll group to a corresponding value according to crack characteristics, the follow-up finish rolling roll group carries out finish rolling with the adjusted power, the control panel detects a roll rotation speed ratio through the finish rolling visual detector to judge whether the follow-up finish rolling roll group operates normally, and if the follow-up finish rolling roll group does not work normally, the roll rotation speed ratio accords with a standard control panel control pressure detector to detect rolling pressure and compares the rolling pressure with a maximum pressure value to judge whether the follow-up finish rolling roll group fails.
2. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 1, wherein in S2, when the rough rolling device performs the formal rough rolling on the dephosphorized low carbon steel plate, the control panel determines a preset thickness H0 of the low carbon steel plate after passing through the group by an initial power V of the rough rolling device; when the low-carbon steel plate passes through the rough rolling device, the control panel controls a rough rolling visual detector in the rough rolling device to detect the actual thickness H of the low-carbon steel plate after passing through the rough rolling roller group, compares H with H0 and judges whether the thickness of the rolled low-carbon steel plate meets the standard according to the comparison result;
if H is more than H0, the control panel judges that the thickness of the rough rolling low-carbon steel plate is too high and adjusts the power of the following rough rolling roller group;
if H=H20, the control panel judges that the thickness of the rough rolled low-carbon steel plate meets the standard;
if H is less than H0, the control panel judges that the thickness of the rough rolled low carbon steel plate is too low and adjusts the power of the roller group of the rough rolling.
3. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 2, wherein in S2, when H > H0, the control panel determines that the thickness of the next rough rolling low carbon steel sheet is too high, the control panel calculates a thickness difference Δh and adjusts the power V of the subsequent rough rolling roll group according to Δh, setting Δha = H-H0; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first rough rolling roll group power increase adjustment coefficient rho 1, a second rough rolling roll group power increase adjustment coefficient rho 2 and a third rough rolling roll group power increase adjustment coefficient rho 3; wherein DeltaH 1 < DeltaH2, 0.3 < ρ1 < ρ2 < ρ3 < 0.7;
When delta H is less than or equal to delta H1, the control panel uses the power increase adjustment coefficient beta 1 of the first rough rolling device to adjust the power V of the subsequent rough rolling device;
when delta H is less than delta H2, the control panel uses the power increase adjustment coefficient beta 2 of the second rough rolling device to adjust the power V of the subsequent rough rolling device;
when delta H > -delta H2, the control panel uses the third roughing device power increase adjustment coefficient beta 3 to adjust the subsequent roughing device power V;
when the control panel increases the power V of the next rough rolling mill by using the kth rough rolling mill power increase adjustment coefficient ρk, k=1, 2,3 is set, the adjusted power of the next rough rolling mill group is denoted as V ', and V' =v×ρk is set.
4. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 2, wherein in step S2, when H < H0, the control panel determines that the thickness of the next rough rolling low carbon steel sheet is too low, the control panel calculates a thickness difference Δh and adjusts the power V of the subsequent rough rolling roll group according to Δh, setting Δha = H0-H; the control panel is provided with a first thickness difference delta H1, a first thickness difference delta H2, a first rough rolling roll group power reduction adjustment coefficient beta 1, a second rough rolling roll group power reduction adjustment coefficient beta 2 and a third rough rolling roll group power reduction adjustment coefficient beta 3; wherein DeltaH1 < DeltaH2, 0.4 < beta 1 < beta 2 < beta 3 < 0.9;
When delta H is less than or equal to delta H1, the control panel uses a third rough rolling device power reduction adjustment coefficient beta 1 to adjust the subsequent rough rolling device power V;
when delta H is less than delta H2, the control panel uses the second rough rolling device power reduction adjustment coefficient beta 2 to adjust the subsequent rough rolling device power V;
when delta H > -delta H2, the control panel adjusts the subsequent roughing device power V using a first roughing device power adjustment reduction coefficient beta 3;
when the control panel uses the j-th rough rolling roll device power reduction adjustment coefficient beta j to reduce the subsequent rough rolling device power V, j=1, 2 and 3 are set, the adjusted subsequent rough rolling roll group power is recorded as V ', and V' =V multiplied by beta j is set.
5. A corrosion resistant low carbon steel controlled temperature controlled rolling process according to claim 3, wherein in step S2, the control panel determines the preset thickness Hb of the low carbon steel sheet after passing through the group by means of roughing device power V; when the control panel controls the following rough rolling roller group to roll the low-carbon steel plate with increased power, the control panel controls the rough rolling visual detector to detect the thickness of the low-carbon steel plate and marks the thickness as H ', and the control panel compares H' with H0 to judge whether the distance between the following rough rolling roller group is adjusted;
If H' =hb, the control panel determines that the following rough roll roller group spacing is not adjusted and controls the rough roll visual detector to detect in real time;
if H '> Hb and H' < H, the control panel determines that the gap between the following rough rolling roll sets needs to be adjusted.
6. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 1, wherein in step S2, when the control panel determines that adjustment of the pitch of the following rough rolling roll group is required, the control panel calculates a difference Δh ' between H ' and Hb and adjusts the pitch J between the following rough rolling roll group according to Δh ', setting Δh ' =hb-H '; the control panel is provided with a first difference value delta H '1, a second difference value delta H'2, a first spacing adjustment coefficient omega 1, a second spacing adjustment coefficient omega 2 and a third spacing adjustment coefficient omega 3, wherein delta H '1 < [ delta ] H'2,0.4 ] < omega 1 ] < omega 2 ] < omega 3 < 0.7;
when delta H 'is less than or equal to delta H'1, the control panel uses a first spacing adjustment coefficient omega 1 to adjust the spacing J between the following rough rolling roller groups;
when DeltaH '1 < DeltaH' 2, the control panel uses a second spacing adjustment coefficient omega 2 to adjust the spacing J between the following rough rolling roll groups;
When DeltaH '> DeltaH' 2, the control panel uses a third pitch adjustment coefficient omega 3 to adjust the pitch J between the following roughing roll sets;
when the control panel adjusts the distance J between the following rough roll sets by using the h-th distance adjustment coefficient ωh, h=1, 2,3 is set, the adjusted distance between the rough roll sets is denoted as J ', and J' =j×ωh is set.
7. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 6, wherein in step S2, the control panel is provided with a preset rolling thickness Hc according to the adjusted pitch; when the control panel controls the subsequent rough rolling roller group to roll the low-carbon steel plate at the adjusted interval J ', the control panel controls the rough rolling visual detector to detect the thickness H ' of the low-carbon steel plate after a single rough rolling roller group and compares the H ' with Hc to judge whether the thickness of the low-carbon steel plate is qualified or not;
if H "=hc, the control panel judges that the thickness of the low-carbon steel plate is qualified and controls the rough rolling visual detector to detect in real time;
if H' > Hc, the control panel judges that the rough roll group fails and stops to give an alarm.
8. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 1, wherein in step S4, the control panel is further provided with a single finish rolling crack characteristic length L0; when the finish rolling device performs finish rolling on the low-carbon steel plate, the control panel controls the finish rolling visual detector to detect crack characteristics L on the low-carbon steel plate after a single finish rolling roller group and judges whether the power of a subsequent finish rolling roller group is adjusted according to the comparison between L and L0; the control panel is provided with a first finish rolling crack characteristic length L1, a second finish rolling crack characteristic length L2, a third finish rolling crack characteristic length L3, a first subsequent finish rolling roller group power adjustment coefficient gamma 1, a second subsequent finish rolling roller group power adjustment coefficient gamma 2 and a third subsequent finish rolling roller group power adjustment coefficient gamma 3; wherein L1 is more than L2 and less than L3, and 0.5 is more than gamma 1 and less than gamma 2 and less than gamma 3 and less than 0.9;
When L is less than or equal to L1, the control panel judges that the power of the subsequent finish rolling device is not regulated;
when L1 is more than L and less than or equal to L2, the control panel uses a power adjustment coefficient gamma 1 of a first subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device;
when L2 is more than L and less than or equal to L3, the control panel uses a power adjustment coefficient gamma 2 of a second subsequent finish rolling roller device to adjust the power K of the subsequent finish rolling device;
when L is more than L3, the control panel uses a third subsequent finishing mill roller device power adjustment coefficient gamma 3 to adjust the subsequent finishing mill device power K;
when the control panel adjusts the subsequent finishing mill roll group power K using the nth subsequent finishing mill roll group power adjustment coefficient γn, n=1, 2,3 is set, and the adjusted subsequent finishing mill roll group power is noted as K' =k×γn.
9. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 8, wherein in step S4, the control panel is provided with a preset roll rotation speed ratio Z0 by the adjusted power K'; when the control panel controls the subsequent finish rolling roller group to finish rolling with the adjusted power K', the control panel detects the actual rotation speed ratio Z and Z0 of the roller of the subsequent finish rolling device through the finish rolling visual detector to judge whether the adjusted power K is qualified or not;
If Z is less than or equal to Z0, the control panel judges that the subsequent finish rolling roller group operates normally and detects rolling pressure;
and if Z is more than Z0, the control panel judges that the subsequent finish rolling roller group has fault shutdown and sends out fault alarm prompt.
10. The corrosion-resistant low carbon steel temperature-controlled rolling process according to claim 9, characterized in that in step S4, the control panel is provided with a maximum rolling pressure Ymax; when the control panel judges that the subsequent finishing mill roll group operates normally, the control panel controls the pressure detector to detect the actual rolling pressure Y of the finishing mill roll group and judges whether the subsequent finishing mill roll group fails according to the comparison of Y and Y0;
if Y is less than or equal to Ymax, the control panel judges that the subsequent finish rolling roller group operates normally;
and if Y is larger than Ymax, the control panel judges that the follow-up finish rolling roller group has fault shutdown and sends out fault alarm prompt.
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| 低碳钢低温轧制工艺实验研究;魏兵;韩斌;杨奕;谭文;汪水泽;刘洋;;武汉科技大学学报(04);全文 * |
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| CN114345952A (en) | 2022-04-15 |
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