CN109226272B - Control method for preventing abnormal manual steel pouring of reversible H-shaped steel universal roughing mill set - Google Patents
Control method for preventing abnormal manual steel pouring of reversible H-shaped steel universal roughing mill set Download PDFInfo
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- CN109226272B CN109226272B CN201811299079.7A CN201811299079A CN109226272B CN 109226272 B CN109226272 B CN 109226272B CN 201811299079 A CN201811299079 A CN 201811299079A CN 109226272 B CN109226272 B CN 109226272B
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- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
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Abstract
The invention is suitable for the technical field of electrical control, and provides a control method for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill set, wherein the control program of the method comprises the following steps: the functional blocks FCYSDC 01-FCYSDC 15 form abnormal manual steel-reversing shape of the H-shaped steel universal roughing mill groupA state determination unit; the functional blocks FCYSDC06, FCYSDC08, FCYSDC10 and FCYSDC 16-FCYSDC 22 form a manual speed control unit in the abnormal manual steel pouring state of the H-shaped steel universal roughing mill group. When an abnormal manual steel pouring state occurs, the control program firstly decelerates and stops the main transmission of the three frames of the universal roughing mill set, and only after the set time length of the stop of the three frames, the speed set value output by the manual operating handle of the H-shaped steel universal roughing mill set is enabled to be
In the enabling state, enough time is provided for processing the rolled piece normally staying in the universal roughing mill group in the period of forced interruption of abnormal manual steel pouring, so that severe self-oscillation of main transmission of three frames of the universal roughing mill group caused by sudden abnormal manual steel pouring blockage and slipping is thoroughly avoided.
Description
Technical Field
The invention belongs to the technical field of hot rolling loop control, and provides a control method for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill set.
Background
For a large H-shaped steel production line of a long-section work department of horse steel, an H-shaped steel universal roughing mill set of the large H-shaped steel production line consists of 3 rolling mills, namely a 1# universal roughing mill (U)
1) Edger (ED) and 2# universal roughing mill (U)
2). The 1# and 2# universal roughing mills were 5500KW four high mills (two horizontal rolls and two vertical rolls) and the edgers were 2000KW two high mills (two horizontal rolls). The universal rough mill set for the H-shaped steel can finish multi-pass reciprocating rolling of the H-shaped steel in a full-automatic mode, and under the full-automatic mode, the set rolling speed of each pass of the three racks of the universal rough mill set is given by a rolling schedule and a manual speed operating handle (namely JOY-STICK). In the universalIn the full-automatic rolling process of the roughing mill group, some process or equipment problems often occur, the universal roughing mill group is required to be decelerated or switched to a manual operation mode, for this reason, an operator usually reduces the rolling speed of the universal roughing mill group by firstly adopting a mode of applying a larger reverse speed given by a manual speed operation handle, and if the problems can not be solved, the operator can immediately switch the universal roughing mill group from the automatic mode to the manual mode. However, in the automatic rolling state with large manual reverse speed intervention, once an operator switches the universal roughing mill set from the automatic mode to the manual mode and forgets to zero the manual speed operating handle due to a jerky operation, in this case, the universal roughing mill set will reverse rapidly without changing the rolling pass number, so that not only will the rolled piece be jammed during the steel reversing process, but also the main transmission of the universal roughing mill will slip due to jamming of the steel reversing and will generate violent self-oscillation, thereby possibly causing the main transmission shaft of the mill to be damaged. Abnormal manual steel pouring of a large H-shaped steel universal roughing mill set in 2018, 4 and 21 is an example, in the abnormal manual steel pouring process, the universal roughing mill U2 has violent self-excited oscillation due to sudden abnormal manual steel pouring blocking and slipping, so that the main transmission lower shaft roller cross joint detection breakage and the upper shaft hydraulic safety pin shearing are caused, and the control system of the reversible H-shaped steel universal roughing mill set is generally provided with an equipment safety operation leak.
Disclosure of Invention
The embodiment of the invention provides a control method for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill group, and aims to ensure safe operation of a control system of the reversible H-shaped steel universal roughing mill group in an abnormal manual steel pouring state.
In order to solve the problems, the invention provides a control method for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill set, and a control program of the control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set consists of the following two units
The functional blocks FCYSDC 01-FCYSDC 15 form an abnormal manual steel pouring state determination unit of the H-shaped steel universal roughing mill set;
the functional blocks FCYSDC06, FCYSDC08, FCYSDC10 and FCYSDC 16-FCYSDC 22 form a manual speed control unit in the abnormal manual steel pouring state of the H-shaped steel universal roughing mill group.
Further, a unit for judging the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set is provided:
under the condition that at least one universal roughing mill in the H-shaped steel universal roughing mill group is provided with steel and the edger is also provided with steel, namely under the condition that the output end Q of the functional block FCYSDC14 is in a '1' state, if the automatic rolling sequence control step number of the H-shaped steel roughing mill group is suddenly changed to zero and the speed set value given by a manual speed operating handle of the roughing mill group is not zero, the output end Q of the functional block FCYSDC15 is in a '1' state, and therefore the H-shaped steel universal roughing mill group is in an abnormal manual steel pouring state.
Further, aiming at the manual speed control unit in the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set:
when the abnormal manual steel pouring state judgment unit of the H-shaped steel universal roughing mill set sends that the H-shaped steel universal roughing mill set is in the abnormal manual steel pouring state, the output end Q of the functional block FCYSDC20 is changed from '0' state to '1' state, and the manual speed control unit of the H-shaped steel universal roughing mill set in the abnormal manual steel pouring state outputs the set manual speed value of the H-shaped steel roughing mill set
Speed set value output by manual speed operating handle
Switching to zero, thereby enabling the H-shaped steel universal roughing mill group to be in a deceleration stop state; when three frames of the H-shaped steel roughing mill set are in a stopped state, the output end Q of the functional block FCYSDC19 is changed from a '0' state to a '1' state, so that the output end Q of the functional block FCYSDC20 is changed from a '1' state to a '0' state, and therefore after the time delay is set, the manual speed control unit under the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set enables the manual speed set value of the H-shaped steel roughing mill set to be output by the manual speed control unit under the abnormal manual steel pouring state of the H-shaped
Speed set value output by switching from zero to manual speed operating handle
After the control program for preventing the abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set is put into use, once an abnormal manual steel pouring state occurs, the control system of the H-shaped steel universal roughing mill set firstly enables the three-frame main transmission of the universal roughing mill set to be decelerated and stopped, and enables the speed set value V output by the manual operating handle of the H-shaped steel universal roughing mill set to be output after the set time length for stopping the three frames is set
J * SIs in an enabled state. Therefore, when the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set occurs, the abnormal manual steel pouring control program of the reversible H-shaped steel universal roughing mill set is forced to interrupt, and in the period of the forced interruption of the abnormal manual steel pouring, an operator has enough time to process a rolled piece normally staying in the universal roughing mill set, so that severe self-oscillation of main transmission of three racks of the universal roughing mill set caused by sudden abnormal manual steel pouring blockage slipping is thoroughly avoided.
Drawings
Fig. 1 is a program structure diagram of a control method for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill train according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The control program of the control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill group is shown in figure 1. In this figure:
NCM is the "numerical comparison" function block, QU is ' 1 ' when X1 > X2, ' QE is ' 1 ' when X1 ═ X2, and QL is ' 1 ' when X1 < X2;
NSW is a "digital input switch" function block, and when I is '1', Y is X2, and when I is '0', Y is X1;
RSR is an RS trigger function block with preferential reset end R, when S is '1' and R is '0', Q is '1', QN is '0', when S is '1' and R is '1', Q is '0', QN is '1', when S is '0' and R is '0', Q and QN are kept in original states, when S is '0' and R is '0', Q is '0' and QN is '1';
ETE is a function block of 'front and back edge identification', when an input end I is changed from a '0' state to a '1' state, the QP end only outputs a positive pulse with the length of 1 cycle period, and the QP end is kept in a '0' state under other states. When the input end I is changed from a '1' state to a '0' state, the QN end only outputs a positive pulse with the length of 1 cycle period, and the QN end is kept in the '0' state under the other states;
PDF is a 'trailing edge delay' functional block;
OR is an OR gate;
AND is an AND gate;
NOT is a NOT gate;
AVA is an absolute value forming function block;
TU1.act is the actual output torque of the main transmission of a 1# universal roughing mill U1;
TU1.N is the main transmission rated torque of the No. 1 universal roughing mill U1;
act is the actual output torque of the main transmission of the universal roughing mill set edge rolling machine ED;
TED.N is the main transmission rated torque of an edge rolling machine ED of the universal roughing mill group;
TU2.act is actual output torque of a main transmission of a No. 2 universal roughing mill U2; TU2.N is the main drive rated torque of the 2# universal roughing mill U2.
In order to avoid violent self-oscillation of main transmission of three frames of a universal roughing mill set due to sudden abnormal manual steel pouring blockage and slippage in the abnormal manual steel pouring process, the invention provides a control method (or a control program) for preventing abnormal manual steel pouring of a reversible H-shaped steel universal roughing mill set, wherein when an abnormal manual steel pouring state occurs, the control method firstly decelerates and stops the main transmission of the three frames of the universal roughing mill set, and only after a set time (2S) after the three frames are stopped, a speed set value output by a manual operating handle of the H-shaped steel universal roughing mill set is enabled to be output
And the control system is in an enabling state, so that the safe operation of the reversible H-shaped steel universal roughing mill set control system in an abnormal manual steel pouring state is ensured.
Specifically, in order to overcome the defects of the prior art, the control program of the control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set is designed and controlled as follows:
the control program of the control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set consists of the following two units:
the functional blocks FCYSDC 01-FCYSDC 15 form an abnormal manual steel pouring state determination unit of the H-shaped steel universal roughing mill set;
the functional blocks FCYSDC06, FCYSDC08, FCYSDC10 and FCYSDC 16-FCYSDC 22 form a manual speed control unit in the abnormal manual steel pouring state of the H-shaped steel universal roughing mill group.
Wherein, for the abnormal manual steel pouring state judging unit of the H-shaped steel universal rough rolling unit, the control function structure chart of the unit can show that:
when there is steel in both universal roughing mill set 1# U1 and edger ED in the universal roughing mill train for H-section steel, the output QU of functional blocks FCYSDC07 and FCYSDC09 in the unit will be in the '1' state, and thus the output Q of functional blocks FCYSDC12 and FCYSDC14 in the unit will also be in the '1' state;
when there is steel in both universal roughing mill U2 # 2 and edger ED in the universal roughing mill train for H-section steel, the output QU of functional blocks FCYSDC09 and FCYSDC11 in the unit will be in the '1' state, and thus the output Q of functional blocks FCYSDC13 and FCYSDC14 in the unit will also be in the '1' state;
when steel exists in the No. 1 universal roughing mill U1, the No. 2 universal roughing mill U2 and the edger ED in the H-shaped steel universal roughing mill group, the output ends QU of the functional blocks FCYSDC07, FCYSDC09 and FCYSDC11 in the unit are all in a '1' state, and the output ends Q of the functional blocks FCYSDC12, FCYSDC13 and FCYSDC14 in the unit are also in a '1' state;
when at least one universal roughing mill (a # universal roughing mill U1 or a # universal roughing mill U1) in the H-shaped steel universal roughing mill set has steel and an edger also has steel, namely when the output end Q of a functional block FCYSDC14 in the unit is in a '1' state, if the automatic rolling sequence control step number of the H-shaped steel roughing mill set suddenly becomes zero and a speed set value given by a manual speed operating handle of the roughing mill set is not zero, the output end Q of the functional block FCYSDC15 in the abnormal manual steel pouring state determination unit of the H-shaped steel universal roughing mill set is in a '1' state, and therefore the H-shaped steel universal roughing mill set is in an abnormal manual steel pouring state.
For the manual speed control unit in the abnormal manual steel pouring state of the H-shaped steel universal roughing mill group, the control function structural diagram of the unit shows that:
when the abnormal manual steel pouring state judgment unit of the H-shaped steel universal roughing mill group sends that the H-shaped steel universal roughing mill group is in the abnormal manual steel pouring state, the output end Q of a functional block FCYSDC20 in the abnormal manual steel pouring state judgment unit is changed from a '0' state to a '1' state, and the abnormal manual steel pouring state judgment unit outputs a set manual speed value of the H-shaped steel roughing mill group
Speed set value output by manual speed operating handle
Switching to zero, thereby reducing the universal roughing train for H-section steelA quick stop state; when the three frames of the H-shaped steel roughing mill set are in a parking state, the output end Q of the functional block FCYSDC19 in the unit is changed from a '0' state to a '1' state, and the output end Q of the functional block FCYSDC20 in the unit is changed from a '1' state to a '0' state, so that after the set time length (2S) is delayed, the unit enables the manual speed set value of the H-shaped steel roughing mill set to be output
Speed set value output by switching from zero to manual speed operating handle
After the control program for preventing the abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set is put into use, once an abnormal manual steel pouring state occurs, the control system of the H-shaped steel universal roughing mill set firstly enables the main transmission of three frames of the universal roughing mill set to be decelerated and stopped, and enables the speed set value output by the manual operating handle of the H-shaped steel universal roughing mill set to be output after the set time for stopping the three frames is long
Is in an enabled state. Therefore, when the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set occurs, the abnormal manual steel pouring control program of the reversible H-shaped steel universal roughing mill set is forced to interrupt, and in the period of the forced interruption of the abnormal manual steel pouring, an operator has enough time to process a rolled piece normally staying in the universal roughing mill set, so that severe self-oscillation of main transmission of three racks of the universal roughing mill set caused by sudden abnormal manual steel pouring blockage slipping is thoroughly avoided.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. The control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set is characterized in that a control program of the control method for preventing abnormal manual steel pouring of the reversible H-shaped steel universal roughing mill set consists of the following two units, namely
The functional blocks FCYSDC 01-FCYSDC 15 form an abnormal manual steel pouring state determination unit of the H-shaped steel universal roughing mill set;
the functional blocks FCYSDC06, FCYSDC08, FCYSDC10 and FCYSDC 16-FCYSDC 22 form a manual speed control unit of the H-shaped steel universal roughing mill set in an abnormal manual steel pouring state;
the judgment unit aims at the abnormal manual steel pouring state of the H-shaped steel universal roughing mill set:
under the condition that at least one universal roughing mill in the H-shaped steel universal roughing mill set is provided with steel and the edger is also provided with steel, namely under the condition that the output end Q of the functional block FCYSDC14 is in a '1' state, if the automatic rolling sequence control step number of the H-shaped steel roughing mill set is suddenly changed to zero and the speed set value given by a manual speed operating handle of the roughing mill set is not zero, the output end Q of the functional block FCYSDC15 is in a '1' state, and therefore the H-shaped steel universal roughing mill set is in an abnormal manual steel pouring state;
the manual speed control unit is used for controlling the speed of the H-shaped steel universal roughing mill set in an abnormal manual steel pouring state:
when the abnormal manual steel pouring state judgment unit of the H-shaped steel universal roughing mill set sends that the H-shaped steel universal roughing mill set is in the abnormal manual steel pouring state, the output end Q of the functional block FCYSDC20 is changed from '0' state to '1' state, and the manual speed control unit of the H-shaped steel universal roughing mill set in the abnormal manual steel pouring state outputs the set manual speed value of the H-shaped steel roughing mill set
Speed set value output by manual speed operating handle
Switching to zero, thereby enabling the H-shaped steel universal roughing mill group to be in a deceleration stop state; when the three stands of the H-shaped steel roughing mill set are in a stopped state, the output end Q of the functional block FCYSDC19 is changed from a '0' state to a '1' state, so that the output end Q of the functional block FCYSDC20 is changed into a '1' stateThe '1' state is changed into the '0' state, so that after the time delay is set for a long time, the manual speed control unit under the abnormal manual steel pouring state of the H-shaped steel universal rough rolling unit can enable the manual speed set value of the H-shaped steel rough rolling unit to be output
Speed set value output by switching from zero to manual speed operating handle
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| US3906764A (en) * | 1974-11-08 | 1975-09-23 | Bethlehem Steel Corp | Rolling mill control method and apparatus |
| JPS56128609A (en) * | 1980-03-13 | 1981-10-08 | Toshiba Corp | Speed controller for reversing mill |
| CN102574176B (en) * | 2009-09-16 | 2015-01-07 | 东芝三菱电机产业系统株式会社 | Controller and controller for rolling mill |
| CN103909119B (en) * | 2014-03-28 | 2015-11-18 | 马钢(集团)控股有限公司 | H profile steel straightener steel-fastening processing method |
| US10610946B2 (en) * | 2015-12-07 | 2020-04-07 | Illinois Tool Works, Inc. | Systems and methods for automated root pass welding |
| CN107962077B (en) * | 2017-11-30 | 2019-06-28 | 马鞍山钢铁股份有限公司 | The control system and its control method of fashioned iron blooming mill and front and back manipulator safety interlocking |
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