CN112371757B - Coil conveying vehicle for preventing cold-rolled steel coil from toppling in coil unloading process and control method thereof - Google Patents
Coil conveying vehicle for preventing cold-rolled steel coil from toppling in coil unloading process and control method thereof Download PDFInfo
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- CN112371757B CN112371757B CN202011084215.8A CN202011084215A CN112371757B CN 112371757 B CN112371757 B CN 112371757B CN 202011084215 A CN202011084215 A CN 202011084215A CN 112371757 B CN112371757 B CN 112371757B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/24—Transferring coils to or from winding apparatus or to or from operative position therein; Preventing uncoiling during transfer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/34—Feeding or guiding devices not specially adapted to a particular type of apparatus
- B21C47/3408—Feeding or guiding devices not specially adapted to a particular type of apparatus for monitoring the lateral position of the material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C51/00—Measuring, gauging, indicating, counting, or marking devices specially adapted for use in the production or manipulation of material in accordance with subclasses B21B - B21F
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Abstract
The invention discloses a coil transporting vehicle for preventing a cold-rolled steel coil from toppling over in a coil unloading process, which comprises a vehicle body, wherein a saddle is arranged on the vehicle body, a laterally extending support is arranged at the head of the vehicle body, a detection assembly is formed by symmetrically fixing detection sensors by using the center positions of the saddles, the detection sensors are fixed on the support, the installation height of the detection sensors is below the horizontal line of the lowest part of the steel coil to be unloaded, and the distance between the two detection sensors of the detection assembly is the sum of the width of the steel coil to be unloaded and the safety distance of allowable offset of the steel coil. The invention can avoid the phenomenon that the steel coil and the coil conveying vehicle slide and are not stopped when an effective moving gap is not formed between the inner ring of the steel coil and the winding drum in a contraction state in the coil unloading process, and avoid the accident that the steel coil falls off from the coil conveying vehicle. The device can judge whether the steel coil slips in real time, thereby realizing the linkage shutdown of the unit, improving the reliability of coil unloading and achieving the aim of safe production.
Description
Technical Field
The invention relates to the field of cold-rolled sheet steel rolling, in particular to a device and a method for preventing a steel coil from slipping and toppling in the coil unloading and transferring processes of a cold-rolled strip steel coil.
Background
In existing cold continuous rolling mills, the Carrousel coiler is a conventionally configured outlet section coiler which, according to design, has 2 expanding and contracting reels, each consisting of 4 sector blocks, which can be expanded and contracted by means of wedges, push rods and rotary hydraulic cylinders, the reels being supported on a common gear box, each reel being driven individually by means of a respective transmission gear train. 1 reel batches the steel band before helping the book position, then changes to the later coiling position and carries out the steel band and batch, batches the position at the coiling and batches after finishing, carries out the split roll by the flying shear, and another reel begins the batching of next volume, and this kind of batching action is continuous in turn going on, and the coil of strip is transported out after being lifted the book to the saddle by the fortune rolling car after through flying shear split roll. Carry out belted steel and batch under the coiler reel expand diameter, carry out belted steel and unload the book under the diameter when contracting entirely, according to the design calculation, there is fixed clearance between coil of strip inner circle and the reel after the reel shrink, and the fortune rolling car rises to and just can accomplish through this clearance and unload the book after the face contact with coil of strip outer lane. However, the coiling and uncoiling mode is established under a normal working state, once abnormal conditions such as band steel clamping belt in the expansion and contraction process of a coiling block caused by poor plate shape of the band steel coiling assisting position and automatic downward sliding of the lifting position of a coil transporting vehicle due to hydraulic leakage and uncoiling occur, the steel coil is clamped by the coiling block and overflows in a shifting mode when the coil transporting vehicle uncoils, and even the coil is seriously turned over, so that the serious production accident is serious in case of occurrence, not only the processing time is long (generally, more than 4 hours at least are needed), but also the equipment in the area is seriously damaged.
Generally, the coil conveying vehicle is divided into a lifting device and a transverse moving device:
the lifting device of the coil transporting vehicle lifts up a steel coil on a winding drum at the winding position of a Carrousel winding machine, and the lifting and the coil unloading operation are realized by the driving of a lifting hydraulic cylinder. The position and speed of the hydraulic cylinder are controlled by the proportional valve when the coil conveying vehicle is lifted. The actual displacement value of the whole lifting stroke of the coil stripping vehicle is measured through a position sensor; the coil transporting vehicle lifting hydraulic cylinder can realize high/low pressure switching, the coil transporting vehicle rises by using low pressure and stops rising after contacting with the lower surface of the steel coil, at the moment, the coil transporting vehicle is converted to high pressure, the winding drum shrinks, and the coil transporting vehicle uses the shrinkage clearance to support the steel coil.
The transverse moving transmission device of the coil transporting vehicle is used for transporting a coil lifted by the coil transporting vehicle to the receiving saddle of the outlet stepping beam, the coil transporting vehicle moves between the coiling position of a Carrousel coiling machine and the receiving saddle of the outlet stepping beam, the transverse moving of the coil transporting vehicle is controlled by the transmission of an alternating current variable frequency motor, the actual displacement value of the coil transporting vehicle is measured through a position sensor, the positioning precision of the coil transporting vehicle is +/-10 mm, and the advancing direction of the coil transporting vehicle points to the receiving saddle of the outlet stepping beam.
The prior art has the following implementation measures for coiling and uncoiling:
the strip head of the steel coil enters a belt wrapper so that the strip steel is wrapped on the surface of the winding drum in a tightly expanded state (as a position No. 1 in a figure 1), and after 3-5 turns of wrapper, the strip steel on the winding drum has enough friction force, so that the strip steel can be continuously wound under a larger tension (as a position No. 2 in a figure 2.
After the coil assisting of the strip steel is finished at the 1# position, the turntable starts to rotate, the winding drum at the 1# winding position rotates to the 2# winding position along with the turntable, and the whole steel coil winding work is carried out at the 2# winding position; meanwhile, the winding drum at the original winding position No. 2 rotates to the winding assisting position No. 1 along with the turntable, and the threading preparation work of the next strip steel is carried out. The working mode of the coiling machine is alternative operation: the threading and the winding assisting are finished at the 1# winding position, the whole strip steel winding and the coil of strip steel unwinding are finished at the 2# winding position, and the winding drum is in an expansion state (as shown in figure 3: the winding drum is expanded).
After the strip steel is coiled at the 2# position, shearing and uncoiling are carried out by an outlet flying shear, and meanwhile, a coil conveying vehicle is lifted to be in contact with the lower surface of the steel coil and immediately stops, so that the coiling block contracts, and a gap is formed between the inner ring of the steel coil and the coiling block (as shown in figure 4, the coiling block contracts); and horizontally moving the coil conveying vehicle to separate the steel coil from the coiling machine and conveying the steel coil to the saddle seat of the walking beam.
In the production process, the operation steps of the auxiliary coiling → the shearing → the coil unloading are all automatically controlled and executed. However, the following problems may exist during the step of performing the coil-stripping operation:
the hydraulic lifting cylinder of the coil conveying vehicle releases pressure, so that the gap between a steel coil and a winding drum is insufficient, and the steel coil and the coil conveying vehicle slide in the translation coil conveying process;
wrinkles are clamped in the gaps of the winding drums in the process of assisting in winding the poor plate shape of the head of the strip steel, and the inner ring of the steel coil is entrained in the process of horizontally moving and conveying the coil.
The abnormal condition can lead to the situation that the steel coil is clamped on the winding drum and is not transported out along with the coil transporting vehicle in the coil unloading process, and then the steel coil is turned over.
The existing precautionary measures that can be taken are: in the coil stripping process, an operator carries out safety production monitoring on site, once abnormal conditions occur, the coil stripping operation is manually stopped, and then manual safety coil stripping is carried out according to the site state. The problem of this measure is that the production efficiency is low because of the need of increasing post operators.
Disclosure of Invention
The invention aims to solve the technical problem of realizing the device and the method for dynamically detecting the position deviation of the steel coil in the width direction on the coil conveying vehicle in real time to judge whether the steel coil slides or not, thereby realizing the linkage shutdown of a unit, improving the reliability of coil unloading and achieving the aim of safe production.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a prevent that cold rolled steel coil of strip unloads coil of strip in-process from empting fortune coil of strip, includes the automobile body, be equipped with the saddle on the automobile body, the locomotive of automobile body is equipped with the support that the side direction extends, and determine module comprises two fixed detection sensor with saddle central point symmetry, it fixes on the support to detect the sensor, the mounting height of detecting the sensor is for treating below the coil of strip lowest level line that unloads, two detect sensor intervals of determine module are for treating coil of strip width and add the safe distance sum that the coil of strip allowed the skew.
The detection assemblies are provided with multiple groups aiming at different widths of the coil discharging steel coils, and each group of detection assemblies is fixed on the supports on two sides.
The safe distance for allowing the steel coil to shift is 80-100mm.
The height position of each detection sensor is arranged 3-5mm below the horizontal line at the lowest position of the steel coil.
Each detection sensor outputs a signal to a signal terminal box, the signal terminal box transmits the signal to an operation monitoring interface, and the operation monitoring interface is connected with an alarm and/or an automatic coil stripping power mechanism.
According to the control method of the coil transporting vehicle for preventing the cold rolled steel coil from toppling over in the coil unloading process, the coil transporting vehicle stops in place, the detection sensor acquires sensing signals in real time after automatic coil unloading is started, and the operation monitoring interface displays and gives an alarm when the steel coil is sensed.
And when the operation monitoring interface displays alarm, the automatic coil stripping power mechanism is automatically stopped.
Before starting the automatic coil stripping, the specification of the current coil stripping steel coil is selected, and the operation monitoring interface only receives signals of two detection sensors of a detection assembly for detecting the steel coil with the specification.
According to the invention, the position detection device in the width direction of the steel coil is designed on the coil conveying vehicle, and if the steel coil transversely slides in the automatic coil unloading process, the steel coil centering condition can be judged according to the steel coils with different widths by the detection device, so that an alarm signal can be sent after the steel coil slides abnormally, and the production line can be automatically stopped.
Through the combination and the method, when an effective moving gap is not formed between the inner ring of the steel coil and the winding drum in the contraction state in the coil unloading process, the steel coil and the coil conveying vehicle are prevented from slipping without being found and being shut down, and the accident that the steel coil falls from the coil conveying vehicle is avoided. Whether the steel coil slips or not can be judged in real time, so that the linkage shutdown of the unit can be realized, the coil unloading reliability is improved, and the aim of safety production is fulfilled.
Drawings
The following is a brief description of the contents of each figure and the symbols in the figures in the description of the invention:
FIG. 1 is a wrapper position;
FIG. 2 is a reeling position;
FIG. 3 is a roll expansion;
FIG. 4 shows the roll retracted;
FIG. 5 shows that the steel coil is normally centered on the coil conveying vehicle;
FIG. 6 shows the steel coil is deviated on the coil conveying vehicle; (L0' in the figure-the distance of the steel coil sliding on the coil conveying vehicle)
FIG. 7 (a) is a schematic view of the detection device installed in a top view;
FIG. 7 (b) is a schematic view of the detection device installed in the front view direction;
FIG. 8 is a schematic diagram of detection signal transmission;
FIG. 9 is a view showing the steps of the coil stripping operation; (in the figure, B is the width of the steel coil)
Fig. 10 is a schematic diagram of the sensor corresponding to the limit position of the steel coil width specification.
Detailed Description
The following description of the embodiments with reference to the drawings is intended to illustrate the present invention in further detail, such as the shapes and structures of the related components, the mutual positions and connections between the components, the functions and working principles of the components, the manufacturing process and the operation method, etc., so as to help those skilled in the art understand the present invention more completely, accurately and deeply.
One side of the coil transporting vehicle is provided with a device capable of detecting the position of the carried steel coil, as shown in fig. 7, the coil transporting vehicle is a common steel coil transporting vehicle which moves in the left-right direction on a rail surface by wheels and can lift by a lifting hydraulic cylinder, particularly, a metal structural member is arranged on the side of a coiling machine core shaft (or called a production line transmission side) close to a production line of the steel coil transporting vehicle, and a plurality of inductive proximity sensors capable of detecting metal are arranged on the metal structural member at intervals.
In the use, through the detection of the sensor, the detection signal is output and calculated, the judgment of the sliding distance can be made when the steel coil slides with the coil stripping vehicle in the process of executing the automatic coil stripping, and when the sliding distance exceeds the safety range set by people, the sensor transmits the received limiting signal to an operation interface and stops the automatic coil stripping operation. Thereby through the emergence of the unusual condition of unloading of detection device preventive discovery fortune rolling car, avoid the roll-over accident. The extending length of the metal structural member, the number and the position of the arranged detection sensors are determined according to the width specification of the produced steel coil and the safe distance of the allowable deviation of the steel coil.
The specific height position of the detection sensor is arranged 3-5mm below the horizontal line at the lowest position of the steel coil and distributed at intervals. The detection sensor can detect the metal substances within a distance of not less than 20 mm. The steel coil does not have relative slip or the sliding distance is very little between coil transporting workshop when normally unloading the coil, in case the sensor detects there is metallic substance, explains this moment promptly that there is the steel coil to arrive here, and the sliding distance of steel coil has surpassed the safety range of artificial settlement promptly, judges that the steel coil produces and unloads the coil unusual.
Determination of the extreme position of the detection sensor in the horizontal direction: the description will be made by taking fig. 10 as an example: l = B/2+ L0, (L: distance from detection sensor to center position of saddle; B: width of steel coil of coil transporting vehicle; L0: safety distance for allowing steel coil to shift, set as L0=100 mm).
A metal structural member is arranged on the side, close to the end face of the car body, of the car body of the steel coil transport vehicle close to the reeling machine core shaft (or called the transmission side of the production line), and a plurality of inductive proximity sensors capable of detecting metals are arranged on the metal structural member at intervals. Through the detection of the sensor, the detection signal is output and calculated, the judgment of the sliding distance can be made when the steel coil slides with the coil stripping car in the process of executing automatic coil stripping, and when the sliding distance exceeds the safety range set by people, the sensor transmits the received limiting signal to an operation interface and stops the automatic coil stripping operation step. Thereby through the emergence of the unusual condition of unloading of detection device preventive discovery fortune rolling car, avoid the roll-over accident.
The specific height position of the detection sensor is arranged 5-10 mm below the horizontal line at the lowest position of the steel coil and distributed at intervals. The detection sensor can detect metal substances within a distance of 0-20 mm. The steel coil does not have relative slip or the sliding distance is very little between coil transporting workshop when normally unloading the coil, in case the sensor detects there is metallic substance, explains this moment promptly that there is the steel coil to arrive here, and the sliding distance of steel coil has surpassed the safety range of artificial settlement promptly, judges that the steel coil produces and unloads the coil unusual.
1) Normal state (as in fig. 5)
After the steel coil is coiled at the coiling position, the coil unloading vehicle ascends to be in contact with the lower surface of the outer ring of the steel coil, then coil splitting and shearing and coiling machine mandrel contraction are carried out, then the coil conveying vehicle carries the steel coil to be horizontally moved out of the mandrel area, and then the steel coil descends and moves to be conveyed to the outlet saddle. In the process, the sensor cannot send out limit detection abnormal information after identification because the steel coil has no offset or the offset does not reach the set distance.
2) Abnormal state (as shown in FIG. 6)
The coil of strip is batching the position completion and is batching the back, fortune rolling car rise to with coil of strip outer lane lower surface contact, later carry out the bundling and cut, coiler dabber shrink, then fortune rolling car is carrying the coil of strip to leaving the translation of dabber direction, this moment in the transportation process, if the coil of strip takes place after the sliding on fortune rolling car:
performing instability judgment on the sliding distance L0', and setting the safe distance of the allowed deviation of the steel coil to be 100mm; if L0' is less than or equal to 100mm, the gravity center of the steel coil is still in a safe state, and the coil unloading operation can be continuously executed; if L0' is more than 100mm, the coil transporting vehicle stops coil unloading operation immediately when the center of gravity of the steel coil is in a destabilization state;
stopping the coil unloading operation of the coil conveying vehicle with the L0' being more than 100mm and transmitting the limit detection abnormal information to a computer monitoring operation interface;
and the operator performs manual safe coil stripping after confirming according to the field state through the prompt of the coil stripping alarm abnormal information.
The coil conveying vehicle with the detectable position of the carried steel coil is adopted to dynamically monitor the steel coil in the coil unloading process, so that the safety of the steel coil in the coil unloading operation process can be improved, and operators do not need to be arranged to monitor on site. Only a certain acid rolling unit is taken as an example, and the production accident that the steel coil slips and topples in the coil unloading and transferring processes is avoided after the detection method is adopted.
As shown in fig. 10, the arrangement of the extreme position detecting sensor of the coil transporting vehicle of the present unit is designed according to the width specification of the produced steel coil as follows: a1-1000mm, A2-1250mm and A3-1500mm (each unit can be set according to different product specifications); the judgment condition is as follows: l0' is less than or equal to 100mm, and the position of the steel coil, L is less than or equal to B/2+ L0, is positioned in the range of the sensor safety detection area; if: if L0' > 100mm, the steel coil L > B/2+ L0 will be detected by the extreme position sensor, and the coil unloading position of the steel coil is abnormal. When the sliding distance L0' of the steel coil with the corresponding width specification is larger than 100mm at the position of the coil conveying vehicle, the detection signal of the extreme position sensor is transmitted to a monitoring operation interface through a terminal box to alarm and trigger an automatic coil unloading stopping operation command.
Example 1: the width B of the steel coil =1000mm and the coil is automatically unloaded;
the steel coil does not slide L0' =0mm, the width center of the steel coil is coincided with the center of the coil transporting vehicle,
l0' < L0, then L =1000/2 < B/2+ L0, can carry out the automatic coil stripping operation;
the steel coil generates certain slippage with the thickness of 0 < L0' and the thickness of 100mm, and the width center of the steel coil deviates from the center of the coil transporting vehicle;
l0 'is less than or equal to L0, then L =1000/2+ L0' is less than or equal to B/2+ L0, and automatic coil stripping operation can be executed;
if the steel coil generates certain slippage L0' which is more than 100mm, the width center of the steel coil deviates from the center position of the coil transporting vehicle; l0 '> L0, then L =1000/2+ L0' > B/2+ L0, and the automatic unwinding operation stops.
Example 2: the width B =1250mm of the steel coil is automatically unloaded;
if the steel coil does not slide L0' =0mm, the width center of the steel coil is superposed with the center of the coil transporting vehicle; l0' < L0, then L =1250/2 < B/2+ L0, and automatic coil stripping operation can be executed;
the steel coil generates certain slippage with the thickness of 0 < L0' and the thickness of 100mm, and the width center of the steel coil deviates from the center of the coil transporting vehicle; l0 'is less than or equal to L0, then L =1250/2+ L0' is less than or equal to B/2+ L0, and automatic coil stripping operation can be executed;
if the steel coil generates certain slippage L0' which is larger than 100mm, the width center of the steel coil deviates from the center position of the coil conveying vehicle; l0 '> L0, then L =1250/2+ L0' > B/2+ L0, and the automatic unwinding operation stops.
Example 3: the steel coil width B =1500mm automatic coil unloading operation;
if the steel coil does not slide L0' =0mm, the width center of the steel coil is superposed with the center of the coil transporting vehicle;
l0' < L0, then L =1500/2 < B/2+ L0, and automatic coil stripping operation can be executed;
the steel coil generates certain slippage with the thickness of 0 < L0' and the thickness of 100mm, and the width center of the steel coil deviates from the center of the coil transporting vehicle;
l0 'is less than or equal to L0, then L =1500/2+ L0' is less than or equal to B/2+ L0, and automatic coil stripping operation can be executed;
if the steel coil generates certain slippage L0' which is larger than 100mm, the width center of the steel coil deviates from the center position of the coil conveying vehicle;
l0 '> L0, then L =1500/2+ L0' > B/2+ L0, and the automatic unwinding operation stops.
The invention has been described above with reference to the accompanying drawings, it is obvious that the invention is not limited to the specific implementation in the above-described manner, and it is within the scope of the invention to apply the inventive concept and solution to other applications without substantial modification.
Claims (2)
1. The utility model provides a prevent fortune coil car that cold rolled steel coil of strip unloads a roll in-process and emptys, includes the automobile body, be equipped with saddle, its characterized in that on the automobile body: the detection assembly is composed of two detection sensors which are symmetrically fixed by using the center position of a saddle, the detection sensors are fixed on the support, the installation height of the detection sensors is below the horizontal line of the lowest position of a steel coil to be coil-discharged, and the distance between the two detection sensors of the detection assembly is the sum of the width of the steel coil to be coil-discharged and the safety distance of the allowable offset of the steel coil;
the detection assemblies are provided with a plurality of groups aiming at different widths of coil unloading steel coils, and each group of detection assemblies is fixed on the brackets at two sides;
the coil conveying vehicle stops in place, after automatic coil unloading is started, the detection sensor acquires a sensing signal in real time, and when a steel coil is sensed, the operation monitoring interface displays an alarm;
the automatic coil unloading power mechanism is automatically stopped when the monitoring interface is operated to display an alarm;
before starting automatic coil stripping, selecting the specification of the current coil stripping steel coil, and only receiving signals of two detection sensors of a detection assembly for detecting the steel coil with the specification by an operation monitoring interface;
the height position of each detection sensor is arranged 3-5mm below the horizontal line at the lowest position of the steel coil;
the safe distance for allowing the steel coil to shift is 80-100mm.
2. The coil carrier for preventing the dumping of the cold rolled steel coil during the coil discharging process as claimed in claim 1, wherein: each detection sensor outputs a signal to a signal terminal box, the signal terminal box transmits the signal to an operation monitoring interface, and the operation monitoring interface is connected with an alarm and/or an automatic coil stripping power mechanism.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011084215.8A CN112371757B (en) | 2020-10-12 | 2020-10-12 | Coil conveying vehicle for preventing cold-rolled steel coil from toppling in coil unloading process and control method thereof |
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| CN202011084215.8A CN112371757B (en) | 2020-10-12 | 2020-10-12 | Coil conveying vehicle for preventing cold-rolled steel coil from toppling in coil unloading process and control method thereof |
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| CN103264069A (en) * | 2013-05-14 | 2013-08-28 | 中冶南方工程技术有限公司 | Device and method for centering steel coil |
| CN207197475U (en) * | 2017-08-09 | 2018-04-06 | 北京首钢冷轧薄板有限公司 | A kind of coil of strip offsets warning device |
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| CN102992003A (en) * | 2011-09-10 | 2013-03-27 | 鞍钢股份有限公司 | On-line position detection method of steel coil |
| CN103471510B (en) * | 2013-09-11 | 2016-03-30 | 北京中冶设备研究设计总院有限公司 | The online offset checking method of a kind of coil of strip |
| CN204486501U (en) * | 2014-12-12 | 2015-07-22 | 宝山钢铁股份有限公司 | A kind of device preventing turnup and guarantee rolling steel coil centering effect |
| CN109500136A (en) * | 2018-11-20 | 2019-03-22 | 攀钢集团攀枝花钢钒有限公司 | The control system and method for upper volume trolley coil of strip automatic centering in height |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103264069A (en) * | 2013-05-14 | 2013-08-28 | 中冶南方工程技术有限公司 | Device and method for centering steel coil |
| CN207197475U (en) * | 2017-08-09 | 2018-04-06 | 北京首钢冷轧薄板有限公司 | A kind of coil of strip offsets warning device |
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