CN111318574A - Real-time online fault monitoring and protecting device for main transmission shaft assembly of wide and thick plate rolling mill - Google Patents
Real-time online fault monitoring and protecting device for main transmission shaft assembly of wide and thick plate rolling mill Download PDFInfo
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- CN111318574A CN111318574A CN202010122457.5A CN202010122457A CN111318574A CN 111318574 A CN111318574 A CN 111318574A CN 202010122457 A CN202010122457 A CN 202010122457A CN 111318574 A CN111318574 A CN 111318574A
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- main transmission
- transmission shaft
- cylinder body
- position sensor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B33/00—Safety devices not otherwise provided for; Breaker blocks; Devices for freeing jammed rolls for handling cobbles; Overload safety devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B35/00—Drives for metal-rolling mills, e.g. hydraulic drives
- B21B35/14—Couplings, driving spindles, or spindle carriers specially adapted for, or specially arranged in, metal-rolling mills
- B21B2035/149—Measuring devices for spindles or couplings
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The invention discloses a real-time online monitoring and protecting device for faults of a main transmission shaft assembly of a wide and thick plate rolling mill, which comprises a base, a position sensor protecting cylinder body, a cylinder body rotating shaft fixing seat and a connecting rod, wherein the position sensor protecting cylinder body is arranged on the base; a cylinder body rotating shaft fixing seat is fixed on the base, a sensor protection cylinder body is fixed on the cylinder body rotating shaft fixing seat, a position sensor is installed in the sensor protection cylinder body, and the position sensor is used for detecting the real-time position of a cylinder rod; the head position of the position sensor protective cylinder body is connected with a connecting rod through a connecting pin shaft, and the connecting rod is fixed on a rotating central shaft of a main transmission shaft balancing device; when the rotating central shaft rotates, the position of the head of the connecting rod, namely the position of the position sensor protective cylinder body, is monitored in real time through the position sensor. The invention can realize real-time online monitoring alarm and shutdown protection, timely discover major equipment hidden dangers and avoid major equipment loss caused by the main transmission shaft component accident of the wide and thick plate rolling mill.
Description
Technical Field
The invention relates to the technical field of equipment in the metallurgical industry, in particular to a real-time online fault monitoring and protecting device for a main transmission shaft assembly of a wide and thick plate rolling mill, which is used for real-time online fault monitoring and automatic control interlocking protection of the main transmission shaft assembly of the wide and thick plate rolling mill.
Background
The main transmission system of the wide and thick plate rolling mill frequently bears severe working conditions of large alternating torque load and impact load in the rolling process, the online working mode of a main transmission shaft assembly (a cross-shaped bag and a flat head sleeve of a cross-shaped bag type main transmission shaft; a coupling body and a main transmission shaft body of a sliding block type main transmission shaft) is reciprocating rolling, the main transmission shaft assembly works under typical alternating stress, and the damage and damage mode is fatigue damage. For the main transmission shaft assembly, the size of the main transmission shaft assembly is limited by the whole rolling mill equipment due to the spatial position relationship, for example, the diameter of a cross-shaped packet at the roller side of the main transmission shaft assembly cannot exceed the minimum diameter of a rolling mill roller, otherwise, the cross-shaped packets at the roller sides of the upper main transmission shaft assembly and the lower main transmission shaft assembly can generate interference collision when running. The cross-bag assembly and the like have limited fatigue torque due to size limitations. Based on the factors, main transmission shaft assembly damage accidents frequently occur in various wide and thick plate factories.
Main drive shaft assembly accidents are characterized in that damage to one assembly of the main drive shaft often causes damage to other assemblies. The subassembly (such as cross package of cross package formula shaft coupling, slider formula shaft coupling body etc.) that causes the accident in case damage the fracture appears, fracture subassembly motor lateral part is connected because of being connected with the final drive shaft motor after the fracture, still at high-speed rotatory, can collide the extrusion with final drive shaft fracture subassembly roll side fracture part, lead to the balanced braced frame of final drive shaft spiale to damage, spindle nose supporting component damages, even lead to work roll flat head position fracture accident to appear the subassembly after the accident breaks when one in upper and lower final drive shaft, the rolling moment of torsion still can be exerted on another final drive shaft, cause its overload, cause another final drive shaft subassembly to damage under many circumstances. Therefore, once the faults of the main transmission shaft assembly occur, the faults are not found in time, and large equipment and production stop loss are often caused.
The main transmission shaft of most rolling mills in steel mills runs with motor current, torque and rotating speed which are available real-time on-line monitoring tracking quantities, but the real-time monitoring of the quantities is alarm interlocking and the like, which can be used as rough protection conditions for ensuring long-term normal operation of the main transmission shaft (if the torque is large, alarm and shutdown are realized, but the over-torque condition in a certain range is large, the main transmission shaft cannot be damaged immediately, and only the fatigue life of the main transmission shaft can be influenced). The main transmission shaft assembly is mostly in fatigue damage (the average annual stress cycle number is about 70 ten thousand), the bearing characteristic parameters such as torque and the like in failure are normal, and the failure foreboding and the equal amount of torque and current in the failure condition do not change under the failure condition and the normal condition of the main transmission shaft, so that the main transmission shaft assembly failure real-time online monitoring characteristic quantity cannot be used.
Therefore, effective main transmission shaft fault characteristic quantity is found, and an effective real-time online monitoring and protecting device for the main transmission shaft assembly fault of the wide and thick plate rolling mill is arranged according to the effective main transmission shaft fault characteristic quantity, so that when the main transmission shaft assembly of the wide and thick plate is just in fault, real-time online monitoring alarm and shutdown protection of an electric device are very necessary.
At present, no related device and technology are used in the actual production of wide and thick plate mills at home and abroad.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a real-time online monitoring and protecting device for the main transmission shaft assembly fault of a wide and thick plate rolling mill.
In order to solve the technical problems, the invention adopts the following technical scheme:
a real-time online monitoring and protecting device for faults of a main transmission shaft assembly of a wide and thick plate rolling mill comprises a base, a position sensor protecting cylinder body, a cylinder body rotating shaft fixing seat and a connecting rod;
the base is fixedly provided with the cylinder body rotating shaft fixing seat, the position sensor protecting cylinder body is fixedly arranged on the cylinder body rotating shaft fixing seat, the position sensor is arranged in the sensor protecting cylinder body, and the position sensor is used for detecting the real-time position of the cylinder rod;
the head part of the position sensor protective cylinder body is connected with the connecting rod through a connecting pin shaft, and the connecting rod is fixed on a rotating central shaft of the main transmission shaft balancing device; when the rotating central shaft rotates, the position of the head of the connecting rod, namely the position of the position sensor protecting cylinder body, is monitored in real time through the position sensor.
Furthermore, the base is fixed on the equipment foundation through foundation bolts.
Furthermore, the real-time online monitoring and protecting device is skillfully combined with the original equipment assembly of the main transmission shaft balancing device, the main transmission shaft body drives the main transmission shaft balancing device frame to move up and down, the action of the balancing frame can drive the connecting rod of the monitoring and protecting device to rotate relative to the rotating point of the fixed support, the connecting rod of the monitoring and protecting device drives the position sensor in the position sensor protecting cylinder to move, so that the position of the main transmission shaft body is monitored in real time, an automatic control program is compiled to calculate the variation of the main transmission shaft body swinging amount (central position variation) when the main transmission assembly of the wide and thick plate rolling mill breaks down, if the variation exceeds an alarm value, a fault alarm is given, and if the variation exceeds a shutdown interlocking value, the shutdown interlocking protection.
Furthermore, the base is fixed with the cylinder body rotating shaft fixing seat through a bolt assembly.
Compared with the prior art, the invention has the beneficial technical effects that:
the swing quantity (central position variation) of the main transmission shaft body is used as the characteristic quantity capable of reflecting the abnormal state of equipment when the main transmission assembly of the wide and thick plate rolling mill is about to break down, and the real-time online monitoring quantity of the main transmission shaft assembly faults is obtained.
The characteristics of the existing equipment are ingeniously combined, when a main transmission shaft assembly (such as a cross bag of a cross bag type coupler, a sliding block type coupler body and the like) is just in fault, the main transmission shaft assembly can drive a connecting rod of a vertical balancing device to move up and down, the connecting rod can drive a connecting rod support of the balancing device to rotate, a connecting rod is additionally arranged on the connecting rod support device, and the tail end of the connecting rod is connected with a position sensor to monitor the swinging amount of the main transmission shaft assembly.
The device is used by combining with a real-time monitoring amount acquisition, calculation and automatic analysis program, so that the real-time acquisition and comparison of the change value of the main transmission shaft oscillating amount caused by the main transmission shaft assembly fault are realized, the fault alarm is carried out when the change value exceeds an alarm value, and the shutdown interlocking protection is carried out when the change value exceeds a shutdown interlocking value; therefore, real-time on-line monitoring alarm and shutdown protection of the electrical device are realized.
The invention is particularly suitable for the situation that the driving hydraulic cylinder of the original rolling mill main transmission shaft balancing device is a tail lug ring type hydraulic cylinder or a position sensor cannot be arranged on the driving hydraulic cylinder of the rolling mill main transmission shaft balancing device due to space limitation and other reasons.
The invention is suitable for various types of main transmission shafts of rolling mills, such as a cross-shaped bag type main transmission shaft, a sliding block type main transmission shaft and the like.
Drawings
The invention is further illustrated in the following description with reference to the drawings.
FIG. 1 is a schematic structural diagram of a main transmission shaft assembly fault real-time online monitoring and protecting device of a wide and thick plate rolling mill of the invention;
FIG. 2 is a schematic view of the installation and use states of the real-time on-line monitoring and protection device for the faults of the main transmission shaft assembly of the wide and thick plate rolling mill (taking a cross-shaped bag type main transmission shaft as an example);
FIG. 3 is a block diagram of the electrical system components and process control for real-time online monitoring and protecting of main drive shaft assembly faults;
description of reference numerals: 1-lower main transmission shaft assembly fault real-time online monitoring and protecting device, 101-first base, 102-first position sensor, 103-first cylinder body rotating shaft fixing seat, 104-first position sensor protecting cylinder body, 105-first connecting pin shaft, 106-first connecting rod, 2-lower main transmission shaft balancing device, 3-upper main transmission shaft balancing device, 4-upper main transmission shaft assembly fault real-time online monitoring and protecting device, 401-second base, 402-second position sensor, 403-second cylinder body rotating shaft fixing seat, 404-second position sensor protecting cylinder body, 405-second connecting pin shaft, 406-second connecting rod, 5-upper working roller motor side safety coupling, 6-lower working roller motor side safety coupling, 7-upper working roller motor side cross-shaped bag, 8-lower working roller motor side cross-shaped bag, 9-lower main transmission shaft, 10-upper main transmission shaft, 11-upper working roll side cross bag, 12-lower working roll side cross bag, 13-upper main transmission shaft flat head sleeve, 14-upper working roll flat head, 15-lower working roll flat head and 16-lower working roll flat head sleeve.
Detailed Description
As shown in fig. 1 and fig. 2, in this embodiment, two sets of the real-time online monitoring and protecting devices for faults of the main transmission shaft assembly of the wide and thick plate rolling mill provided by the invention need to be used when the device is used, namely, the lower main transmission shaft assembly fault real-time online monitoring and protecting device 1 and the upper main transmission shaft assembly fault real-time online monitoring and protecting device 4.
As shown in fig. 1, the real-time online monitoring and protecting device 1 for lower main drive shaft assembly failure includes a first base 101, a first position sensor 102, a first cylinder body rotating shaft fixing seat 103, a first position sensor protecting cylinder body 104, a first connecting pin 105, and a first connecting rod 106. The first base 101 is fixed on an equipment base through foundation bolts, the first base 101 fixes a cylinder body rotating shaft fixing seat 103 through bolts, the cylinder body rotating shaft fixing seat 103 is used for fixing a first position sensor protection cylinder body 104 (the sensor protection cylinder body can be made of a standard hydraulic cylinder (air cylinder)), the first sensor 102 is installed in the first sensor protection cylinder body 104, and the first position sensor 102 detects the real-time position of a cylinder rod of the cylinder body. The first position sensor protection cylinder 104 is connected to a first connecting rod 106 at a cylinder head position by a first connecting pin 105, and the first connecting rod 106 is fixed to a rotation center shaft of the lower main drive shaft balancer 2.
As shown in fig. 1, the upper main drive shaft assembly fault real-time online monitoring and protecting device 4 includes a second base 401, a second position sensor 402, a second cylinder rotating shaft fixing seat 403, a second position sensor protecting cylinder 404, a second connecting pin 405, and a second connecting rod 406. The second base 401 is fixed on the equipment base through anchor bolts, the second base 401 fixes a cylinder body rotating shaft fixing seat 403 through bolts, the cylinder body rotating shaft fixing seat 403 is used for fixing a second position sensor protection cylinder body 404 (the sensor protection cylinder body can be made of a standard hydraulic cylinder (air cylinder)), a second sensor 402 is installed in the second sensor protection cylinder body 404, and the second position sensor 402 detects the real-time position of a cylinder rod of the cylinder body. The second position sensor protection cylinder 404 is connected to a second link 406 at a cylinder head position by a second link pin 405, and the second link 406 is fixed to the rotation center shaft of the upper main drive shaft balancer 3. When the rotation center shaft rotates, the amount of change in the position of the head portion of the second connecting rod 406, that is, the amount of change in the position of the cylinder rod of the second position sensor protection cylinder 404, is monitored in real time by the second position sensor 402.
The invention carries out the fault alarm or shutdown interlocking protection process on the main transmission shaft assembly in the actual use as follows:
when a main transmission shaft assembly (a main transmission shaft body, cross bags at two ends and a flat head sleeve at a roller side, such as assemblies 7-13 and 16 in fig. 1) breaks down, the position variation of the rotation center of the main transmission shaft body is increased, namely the swinging amount of the main transmission shaft is increased. The main transmission shaft body drives the vertical connecting rod support of the main transmission shaft balancing device to move up and down, the vertical connecting rod support drives the swinging support to rotate relative to the rotating point of the fixed base, and the connecting rod drives the position sensor to move so as to monitor the position variation of the main transmission shaft body in real time, thereby realizing the real-time monitoring of the fault of the main transmission shaft assembly. Because the position change value reflected by the position sensing element can be caused by the position change of an EGC (mechanical pressing device) and an HGC (hydraulic roll gap adjusting cylinder device) in the rolling process, a special program is compiled to eliminate the factors (when the EGC position is collected and is not changed, the balance device when the HGC position is only slightly changed drives the position change of a hydraulic cylinder rod, namely the change value of the main transmission shaft swinging amount caused by the main transmission shaft assembly fault is really reflected), the change value of the main transmission shaft swinging amount caused by the main transmission shaft assembly fault under the condition of not being influenced by the factors is calculated, if the change value exceeds the alarm value, the fault alarm is carried out, and if the change value exceeds the shutdown interlock value, the shutdown interlock protection is carried out.
As shown in FIG. 3, when the rolling mill is in production operation, the position sensor always detects the position value of the cylinder rod in the position sensor protection cylinder body in real time, when the rolling mill bites steel and loads into a rolling mode, and a loading signal appears for 50 milliseconds, an electrical system PLC (programmable Logic controller) -programmable Logic controller records that the current position value detected by the position sensor is P0, then the real-time position value P detected by the position sensor is not recorded continuously in real time, the absolute value △ P of the difference value between P and P0 is calculated in real time, △ P is compared with the set alarm values A1 and △ P and the interlocking stop value A2 in real time, when △ P is larger than A1, the PLC triggers a yellow alarm of the main transmission shaft fault on an operation picture of the rolling mill main control chamber, when △ P is larger than A2, the PLC sends a stop command to a rolling mill control CPU (central processing unit), and the change value of the main transmission shaft assembly fault amount brought by the fault is collected and compared in real time, and the change value exceeds the alarm, the interlocking protection device is monitored and the interlocking protection device is carried out in real time.
The device is already applied to a production line of a steel-coated wide and thick plate, and multiple on-site practical use verifications are carried out (for example, the top opening fault of the cross assembly of the main transmission shaft of the roughing mill at 8 and 18 days in 2019 and the crack fault of the cross shaft of the cross assembly of the main transmission shaft of the roughing mill at 9 and 13 days in 2019 are alarm information given according to the invention, the main transmission assembly is detected to be in fault by timely shutdown inspection, and the major equipment accidents are avoided in time by fault detection).
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (4)
1. A real-time online monitoring and protecting device for faults of a main transmission shaft assembly of a wide and thick plate rolling mill is characterized by comprising a base, a position sensor protecting cylinder body, a cylinder body rotating shaft fixing seat and a connecting rod;
the base is fixedly provided with the cylinder body rotating shaft fixing seat, the position sensor protecting cylinder body is fixedly arranged on the cylinder body rotating shaft fixing seat, the position sensor is arranged in the sensor protecting cylinder body, and the position sensor is used for detecting the real-time position of the cylinder rod;
the head part of the position sensor protective cylinder body is connected with the connecting rod through a connecting pin shaft, and the connecting rod is fixed on a rotating central shaft of the main transmission shaft balancing device; when the rotating central shaft rotates, the position of the head of the connecting rod, namely the position of the position sensor protecting cylinder body, is monitored in real time through the position sensor.
2. The device for monitoring and protecting the faults of the main transmission shaft assembly of the wide and thick plate rolling mill in real time according to claim 1, wherein the base is fixed on an equipment foundation through foundation bolts.
3. The device for real-time online monitoring and protecting of faults of the main transmission shaft assembly of the wide and thick plate rolling mill according to claim 1 is characterized in that the real-time online monitoring and protecting device is skillfully combined with an original equipment assembly of the main transmission shaft balancing device, the main transmission shaft body drives the main transmission shaft balancing device frame to move up and down, the balancing frame moves to drive the monitoring and protecting device connecting rod to rotate relative to a fixed support rotating point, the monitoring and protecting device connecting rod drives the position sensor in the position sensor protecting cylinder to move so as to monitor the position of the main transmission shaft body in real time, an automatic control program is programmed to calculate the variation of the main transmission shaft body swinging quantity when the main transmission assembly of the wide and thick plate rolling mill breaks down, if the variation exceeds an alarm value, a fault alarm is given, and if the variation exceeds a shutdown interlocking value, shutdown interlocking protection.
4. The real-time online fault monitoring and protecting device for the main transmission shaft assembly of the wide and thick plate rolling mill according to claim 1, wherein the cylinder body rotating shaft fixing seat is fixed on the base through a bolt assembly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122457.5A CN111318574A (en) | 2020-02-27 | 2020-02-27 | Real-time online fault monitoring and protecting device for main transmission shaft assembly of wide and thick plate rolling mill |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010122457.5A CN111318574A (en) | 2020-02-27 | 2020-02-27 | Real-time online fault monitoring and protecting device for main transmission shaft assembly of wide and thick plate rolling mill |
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| CN111318574A true CN111318574A (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010122457.5A Pending CN111318574A (en) | 2020-02-27 | 2020-02-27 | Real-time online fault monitoring and protecting device for main transmission shaft assembly of wide and thick plate rolling mill |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355058A (en) * | 2020-09-30 | 2021-02-12 | 张家港扬子江冷轧板有限公司 | Emergency stop-responding structure of acid rolling mill |
| CN113399474A (en) * | 2021-05-26 | 2021-09-17 | 舞阳钢铁有限责任公司 | Method for quickly pre-judging faults of main connecting shaft of rolling mill roller |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1015942A (en) * | 1962-09-04 | 1966-01-05 | Schloemann Ag | Improvements in and relating to rolling mill stands |
| JPS5510344A (en) * | 1978-07-10 | 1980-01-24 | Hitachi Ltd | Universal spindle coupling holder |
| DE10163373C1 (en) * | 2001-12-22 | 2003-02-27 | Masch Und Werkzeugbau Gmbh | Changing the working rollers in a roll stand comprises arranging an upper supporting roller in a dismantling position below the maximum lifting position to drive the working roller set together with the lower supporting roller |
| CN101733288A (en) * | 2008-11-04 | 2010-06-16 | 上海重型机器厂有限公司 | Device for balancing upper and lower main transmission shafts of heavy and medium plate mill |
| CN101797587A (en) * | 2010-04-06 | 2010-08-11 | 王建国 | Hydraulic pressure balance device of twenty-roller steel plate cold rolling mill transmission roller and control method |
| CN102784802A (en) * | 2011-05-20 | 2012-11-21 | 宝山钢铁股份有限公司 | Device and method for monitoring state of cross cardan shaft of CVC rolling mill |
| CN105478489A (en) * | 2015-12-31 | 2016-04-13 | 中钢集团西安重机有限公司 | Connecting shaft self-balancing bracket device with floating adjusting function and adjusting method |
| CN206535871U (en) * | 2016-12-20 | 2017-10-03 | 攀钢集团攀枝花钢钒有限公司 | Mill's main drive shaft positioner |
-
2020
- 2020-02-27 CN CN202010122457.5A patent/CN111318574A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1015942A (en) * | 1962-09-04 | 1966-01-05 | Schloemann Ag | Improvements in and relating to rolling mill stands |
| JPS5510344A (en) * | 1978-07-10 | 1980-01-24 | Hitachi Ltd | Universal spindle coupling holder |
| DE10163373C1 (en) * | 2001-12-22 | 2003-02-27 | Masch Und Werkzeugbau Gmbh | Changing the working rollers in a roll stand comprises arranging an upper supporting roller in a dismantling position below the maximum lifting position to drive the working roller set together with the lower supporting roller |
| CN101733288A (en) * | 2008-11-04 | 2010-06-16 | 上海重型机器厂有限公司 | Device for balancing upper and lower main transmission shafts of heavy and medium plate mill |
| CN101797587A (en) * | 2010-04-06 | 2010-08-11 | 王建国 | Hydraulic pressure balance device of twenty-roller steel plate cold rolling mill transmission roller and control method |
| CN102784802A (en) * | 2011-05-20 | 2012-11-21 | 宝山钢铁股份有限公司 | Device and method for monitoring state of cross cardan shaft of CVC rolling mill |
| CN105478489A (en) * | 2015-12-31 | 2016-04-13 | 中钢集团西安重机有限公司 | Connecting shaft self-balancing bracket device with floating adjusting function and adjusting method |
| CN206535871U (en) * | 2016-12-20 | 2017-10-03 | 攀钢集团攀枝花钢钒有限公司 | Mill's main drive shaft positioner |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112355058A (en) * | 2020-09-30 | 2021-02-12 | 张家港扬子江冷轧板有限公司 | Emergency stop-responding structure of acid rolling mill |
| CN112355058B (en) * | 2020-09-30 | 2022-06-10 | 张家港扬子江冷轧板有限公司 | Emergency stop-responding structure of acid rolling mill |
| CN113399474A (en) * | 2021-05-26 | 2021-09-17 | 舞阳钢铁有限责任公司 | Method for quickly pre-judging faults of main connecting shaft of rolling mill roller |
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Application publication date: 20200623 |