阅读说明：本技术 冷轧机组全自动生产酸洗板的控制方法及控制系统 (Control method and control system for full-automatic production of pickled plate by cold rolling unit ) 是由 郑灵科 田飞 吴建强 张益龙 李光辉 李瑾 谭卫锋 吴雄杰 黄程鹏 付志平 赵丁 于 2019-09-12 设计创作，主要内容包括：本发明属于钢板生产技术领域,具体涉及冷轧机组全自动生产酸洗板的控制方法及控制系统,所述冷轧机组全自动生产酸洗板的控制方法,包括以下步骤：建立酸洗模式和轧机穿带模式；选取酸洗模式,带钢依次经酸洗工序、轧机工序后卷取,得到钢板产品；其中,在酸洗模式下,建立酸洗板剪切点跟踪模型,发出飞剪剪切信号；建立酸洗板张力控制模型,合并轧机出口张力和轧机入口张力；酸洗模式和轧制模式可随时切换,降低运输成本,提高酸洗效率。(the invention belongs to the technical field of steel plate production, and particularly relates to a control method and a control system for full-automatic production of pickled plates by a cold rolling unit, wherein the control method for full-automatic production of pickled plates by the cold rolling unit comprises the following steps: establishing an acid washing mode and a rolling mill threading mode; selecting a pickling mode, and coiling the strip steel after the pickling process and the rolling mill process in sequence to obtain a steel plate product; in the pickling mode, a pickling plate shearing point tracking model is established, and a flying shear shearing signal is sent out; establishing a tension control model of the pickling plate, and combining the outlet tension of the rolling mill and the inlet tension of the rolling mill; the pickling mode and the rolling mode can be switched at any time, so that the transportation cost is reduced, and the pickling efficiency is improved.)

1. the control method for the full-automatic production of the pickled plate by the cold rolling unit is characterized by comprising the following steps of:

establishing an acid washing mode and a rolling mill threading mode;

selecting a pickling mode, and pickling the strip steel in a pickling process, transporting the strip steel in a rolling mill process and then coiling the strip steel to obtain a steel plate product;

in the pickling mode, a pickling plate shearing point tracking model is established, and a flying shear shearing signal is sent out; and establishing a tension control model of the pickled plate, and combining the outlet tension of the rolling mill and the inlet tension of the rolling mill.

2. the method for controlling the full-automatic production of the pickled plate in the cold-rolling mill train according to claim 1, wherein the strip steel is subjected to the pickling process and then is subjected to an oiling process.

3. the control method for the full-automatic pickled plate production of the cold-rolling mill train according to claim 1, wherein in the pickling mode, a pickling plate shearing point tracking mode is established, and a flying shear shearing signal is sent out, comprising,

and (3) calculating the length of the strip steel by taking the welding seam detected by the No. 5 welding seam detector as a calculation starting point, and sending a flying shear shearing signal when the length of the strip steel reaches the length from the No. 5 welding seam detector to the No. 4 rolling mill, so as to complete the establishment of the pickled plate shearing point tracking mode.

4. The control method for the full-automatic production of pickled plates by the cold rolling unit according to claim 1, wherein the establishment of the pickled plate tension control model and the combination of the mill outlet tension and the mill inlet tension comprises,

and the No. 6 tension roller participates in tension control and combines the outlet tension of the rolling mill and the inlet tension of the rolling mill.

5. The control method for the full-automatic pickled plate production of the cold rolling mill set according to claim 4, wherein in the pickling mode, the rolling mill speed is set to 200m/min to 300 m/min.

6. The control method for the full-automatic production of pickled plates by the cold-rolling unit according to claim 1, characterized in that in the pickling mode, a pickled plate coiling tension control model is also established, comprising,

when the shearing point of the strip steel reaches a 4# rolling mill, the tension is reduced to 4 tons, and after the mandrel of the shearing and splitting coiler is wound, the coiling tension is restored to a set value.

7. The control method for the full-automatic pickled plate production of the cold rolling unit according to claim 1, characterized in that the strip threading mode of the rolling mill is selected and the rolling mill speed is set to 20m/min to 50 m/min.

8. The control method for the full-automatic production of the pickled plate by the cold rolling unit according to any one of claims 1 to 7, wherein the thickness of the steel plate product is 1.5 to 3.5mm, and the width is 900 to 1580 mm.

9. A control system for the full-automatic production of pickled plates by a cold rolling unit adopts the control method for the full-automatic production of pickled plates by the cold rolling unit as claimed in any one of claims 1 to 8,

The control system sequentially comprises an acid cleaning process section, a rolling mill process section and a coiling process section according to the transportation route of the strip steel;

Wherein, the pickling process section is used for pickling the strip steel;

The rolling mill process section is used for transporting or rolling the pickled strip steel;

And the coiling process section is used for coiling the strip steel transported by the rolling mill.

10. The control system for the full-automatic pickled plate production of the cold-rolling mill train according to claim 9, wherein an oiling process is arranged between the pickling process section and the rolling mill process section.

Technical Field

The invention belongs to the technical field of steel plate production, and particularly relates to a control method and a control system for full-automatic pickled plate production of a cold rolling unit.

Background

the hot-rolled pickled steel has high material strength, good welding and stamping properties and wide application. The steel is mainly used for chassis systems, body structural parts, seat systems and wheels of passenger cars, and steel and wheel steel for body structural parts of automobiles in the automobile industry, and the steel for body structural parts of automobiles is mainly applied to various reinforcements, bumper bars, various beams, connecting parts, brackets and the like of automobiles.

however, since no special pickling line is provided in the continuous rolling line, the hot-rolled pickled steel needs to be transported to a special pickling line for processing and pickling instead, which results in high transportation cost and low pickling efficiency.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a control method and a control system for full-automatic production of pickled plates by a cold rolling mill set, wherein the pickling mode and the rolling mode can be switched at any time, the transportation cost is reduced, and the pickling efficiency is improved.

in order to achieve the purpose, the technical scheme adopted by the invention on one hand is as follows: a control method for full-automatic production of pickled plates by a cold rolling unit comprises the following steps:

Establishing an acid washing mode and a rolling mill threading mode;

Selecting a pickling mode, and coiling the strip steel after the pickling process and the rolling mill process in sequence to obtain a steel plate product; in the pickling mode, a pickling plate shearing point tracking model is established, and a flying shear shearing signal is sent out; and establishing a tension control model of the pickled plate, and combining the outlet tension of the rolling mill and the inlet tension of the rolling mill.

Preferably, after the acid cleaning process, the method further comprises the step of oiling the strip steel.

preferably, in the pickling mode, establishing a pickling line shear point tracking mode, sending out a flying shear signal, including,

And (3) calculating the length of the strip steel by taking the welding seam detected by the No. 5 welding seam detector as a calculation starting point, and sending a flying shear shearing signal when the length of the strip steel reaches the length from the No. 5 welding seam detector to the No. 4 rolling mill, so as to complete the establishment of the pickled plate shearing point tracking mode.

Preferably, the establishing of the pickled plate tension control model, the combining of the mill outlet tension and the mill inlet tension comprises,

and the No. 6 tension roller participates in tension control and combines the outlet tension of the rolling mill and the inlet tension of the rolling mill.

Preferably, in the pickling mode, the mill speed is set to 200m/min to 300 m/min.

Preferably, in the pickling mode, a pickled plate coiling tension control model is also established, comprising,

when the shearing point of the strip steel reaches a 4# rolling mill, the tension is reduced to 4 tons, and after the mandrel of the shearing and splitting coiler is wound, the coiling tension is restored to a set value.

Preferably, a strip threading mode of the rolling mill is selected, and the speed of the rolling mill is set to be 20-50 m/min.

Preferably, the thickness of the steel plate product is 1.5-3.5 mm, and the width of the steel plate product is 900-1580 mm.

The invention provides a control system for full-automatic production of pickled plates by a cold rolling unit, which comprises an acid pickling process section, a rolling mill process section and a coiling process section in sequence according to a strip steel transportation route;

Wherein, the pickling process section is used for pickling the strip steel;

The rolling mill process section is used for transporting or rolling the pickled strip steel;

And the coiling process section is used for coiling the strip steel transported by the rolling mill.

Preferably, an oil coating process is arranged between the pickling process section and the rolling mill process section.

Compared with the prior art, the invention has the following beneficial effects:

According to the invention, the pickling mode and the rolling mill threading mode are switched at any time on the pickling continuous rolling line, so that the rolling is not carried out in the pickling mode, the rolling mill safely transports the strip steel, and the surface of the strip steel is not damaged; meanwhile, the strip steel can be rolled when the strip steel needs to be continuously rolled; the transportation cost is reduced, and the pickling efficiency is improved.

because the strip steel transported by the rolling mill does not extend in the pickling mode, a new pickling plate shearing point tracking model is established in the pickling mode, so that the welding seam in the strip steel can be accurately tracked, and the accuracy of the coil splitting position and the coil quantity is ensured; the pickled plate tension control model is established, and the scratch caused by unstable tension of the rolling mill can be prevented.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

FIG. 1 is a schematic flow chart of a control method for full-automatic production of pickled plates by a cold rolling unit according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a control system for full-automatic production of pickled plates by a cold rolling unit according to an embodiment of the present invention;

Wherein, each reference mark in the figure is: 1-uncoiler; 2-welding machine, 3-pickling and rinsing tank, 4-oiling machine, 5-lower intermediate roller carrier roller, 6-belt guide plate carrier roller passing between frames and 7-coiling machine.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

in the description of the present invention, it is to be understood that the terms "length" - "width" - "up" - "down" - "front" - "back" - "left" - "right" - "vertical" - "horizontal" - "top" - "bottom" - "inside" - "outside" etc. indicate orientations or positional relationships based on those shown in the drawings, which are merely for convenience of describing and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation-be constructed and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.

furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" - "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The embodiment of the invention provides a control method and a control system for full-automatic production of pickled plates by a cold rolling unit.

The production process flow of the pickling continuous rolling line in the embodiment of the invention can be as follows: raw materials, a walking beam, a steel coil transport vehicle, a steel coil trolley, a 1# uncoiler, a 2# uncoiler, a 1# straight head machine, a 2# straight head machine, a double-layer shear (1# crosscut shear and 2# crosscut shear), a welding machine, a 1# tension roller, a 1# welding seam detector, an inlet loop (1# deviation correction roller, 2# deviation correction roller and 3# deviation correction roller), a 2# welding seam detector, a 2# tension roller, a tension leveler, a 3# tension roller, a pickling tank, a rinsing tank, a drying machine, a 4# tension roller, a 4# deviation correction roller, a 3# welding seam detector, a 5# deviation correction roller, a 4# welding seam detector, a crescent shear, a 6# deviation correction roller, a circle shear, a deburring roller, a 5# tension roller, a 2# welding seam outlet loop, a 5# welding seam detector, a 7# deviation correction roller, a 6# tension roller, an 8# deviation correction roller, an inlet hydraulic shear, a machine, a stabilizing roller, a 0# three-4 # rolling mill Rolling mill quality inspection, plate shape instrument, outlet pinch roll, drum type flying shear, coiling machine, outlet walking beam, weighing, bundling and warehousing and packaging.

as shown in fig. 1, a control method for full-automatic production of pickled plates by a cold rolling unit according to an embodiment of the present invention includes the following steps:

s101, establishing an acid washing mode and a rolling mill threading mode;

In the pickling mode, the strip steel is pickled, transported and the like without rolling; and rolling the strip steel in a threading mode of the rolling mill. The pickling mode or the rolling mill threading mode can be selected by one key on the operation interface, and the mode is convenient to switch.

s102, selecting an acid washing mode, and coiling the strip steel after the acid washing process and the rolling mill process in sequence to obtain a steel plate product;

In the pickling mode, a pickling plate shearing point tracking model is established, and a flying shear shearing signal is sent out; and establishing a tension control model of the pickled plate, and combining the outlet tension of the rolling mill and the inlet tension of the rolling mill.

because the rolling mill does not roll in the pickling mode, the welding seam tracking mode of the original system is possibly inaccurate, and a new pickling plate shearing point tracking model needs to be established at the moment.

Specifically, in the pickling mode, a pickling plate shearing point tracking mode is established, and a flying shear shearing signal is sent out, including,

Taking the welding seam detected by the No. 5 welding seam detector as a calculation starting point, calculating the length of strip steel (such as the length of the strip steel passed by the No. 6 tension roll), and sending a flying shear shearing signal when the length of the strip steel reaches the length from the No. 5 welding seam detector to the No. 4 rolling mill carrier roller to complete the establishment of the pickled plate shearing point tracking mode; before a No. 5 welding seam detector, the original welding seam tracking mode of the system can be adopted; after the # 5 welding seam detector is adopted, the tracking mode of the shearing point of the pickled plate established by the embodiment of the invention is adopted, the # 5 welding seam detector is used as a calculation starting point, the length of the # 5 welding seam detector is used as the triggering moment of the corresponding point, and the length of the strip steel passed by the # 6 tension roller is used as the length of the strip steel.

the welding seam in the strip steel can be accurately tracked, and the accuracy of the coil splitting position and the coil quantity can be ensured.

Specifically, the establishing of the tension control model of the pickling plate and the combination of the outlet tension of the rolling mill and the inlet tension of the rolling mill comprise,

And the No. 6 tension roller participates in tension control and combines the outlet tension of the rolling mill and the inlet tension of the rolling mill. The tension control model of the pickling plate is established, so that the scratch caused by unstable tension of the rolling mill can be prevented, and the transportation speed of the strip steel in the pickling mode can be improved.

The method is characterized in that a rolling mill threading mode is selected, a 6# tension roller is driven by a crimping machine to run, and in an acid cleaning mode, the 6# tension roller is changed from driven to active to participate in tension control, and the problem of speed limitation caused by overlarge load difference of the 6# tension roller, the 3# tension roller and the 4# tension roller is solved. Under the pickling mode, the transportation speed of the strip steel can reach 300 m/min.

specifically, in the pickling mode, the rolling mill speed may be set to 200m/min to 300 m/min. The mill speed can also be set to 210m/min, 220m/min, 230m/min, 240m/min, 250m/min, 260m/min, 270m/min, 280m/min, 290m/min or 300 m/min.

selecting a strip threading mode of the rolling mill, and setting the speed of the rolling mill to be 20-50 m/min. The mill speed may be set at 20m/min, 23m/min, 25m/min, 28m/min, 30m/min, 32m/min, 35m/min, 40m/min, 45m/min or 50 m/min.

The strip steel transportation speed in the pickling mode is obviously higher than that in the rolling mill threading mode, and the rolling mill speed can be increased to 300m/min from 50 m/min.

According to the embodiment of the invention, the pickling mode and the rolling mill threading mode are switched at any time on the pickling continuous rolling line, so that the rolling is not carried out in the pickling mode, the rolling mill safely transports the strip steel, and the surface of the strip steel is not damaged; meanwhile, the strip steel can be rolled when the strip steel needs to be continuously rolled; the transportation cost is reduced, and the pickling efficiency is improved.

Because the strip steel transported by the rolling mill does not extend in the pickling mode, a new pickling plate shearing point tracking model is established in the pickling mode, so that the welding seam in the strip steel can be accurately tracked, and the accuracy of the coil splitting position and the coil quantity can be ensured; the pickled plate tension control model is established, and the scratch caused by unstable tension of the rolling mill can be prevented.

The embodiment of the invention can realize full-automatic continuous operation and realize batch production.

In S102, after the strip steel is subjected to the acid pickling process, oiling the strip steel;

according to the embodiment of the invention, the oiling process is arranged on the pickling continuous rolling line, so that the surface of the strip steel can be prevented from rusting, the strip steel does not need to be transported to a recoiling unit for oiling, the production flow is shortened, and the unit operation rate is improved; meanwhile, the oiling plays a role in lubrication, so that the band steel is prevented from being scratched in the subsequent process, and the product quality is improved. The embodiment of the invention not only realizes the oil coating process on the pickling continuous rolling line, but also can complete the functions of the continuous rolling mill, such as the transportation function and the rolling function.

The oiling mode can be set as heavy oiling, midway oiling or light oiling, and the specific oiling mode can also be selected according to production requirements.

Specifically, can increase one set of static oiling machine behind 8# rectifying roller, directly scribble the oil to the pickled plate, can not produce the bad problem of scribbling the oil, realize the online fat liquoring of pickled plate, need not to reach the heavy coil unit fat liquoring.

Specifically, in the acid washing mode, the height of a roller of the rolling mill is adjusted, so that the surface of the strip steel cannot be damaged when the strip steel is transported;

The height of the carrier roller of each rolling mill can be independently adjusted, and the rolling bearing can be arranged on the carrier roller, so that the rolling mill can flexibly run and synchronously run with the strip steel, and the strip steel cannot be scratched.

before the band steel is transported, the carrier roller can be pre-installed on a lower middle roller of a roller changing vehicle, when the band steel is transported, the carrier roller is pushed into a rolling mill, the lower middle roller can be locked through a hydraulic cylinder, and then the carrier roller on the lower middle roller is moved to a rolling central line. After the strip steel is transported in the pickling mode, the carrier roller can be pulled back to the roller changing vehicle. The method completely does not occupy the production preparation time, and has high efficiency and convenient operation. Wherein, the bearing roller can adopt polyurethane material.

specifically, under the pickling mode, a pickling plate coiling tension control model is also established, which comprises,

When the shearing point of the strip steel reaches a 4# rolling mill, the tension is reduced to 4 tons, and after the mandrel of the shearing and splitting coiler is wound, the coiling tension is restored to a set value.

Because the coiler is separated from the inlet No. 6 tension roller by a certain distance such as 40 meters, the tension of the strip steel is completely established by the outlet pinch roller during the coiling process, but the pinch roller can only provide 22KW power and cannot provide the tension of 8-11 tons, the strip steel rebounds and sags at the moment of coiling and shearing, and the scratch length of the strip head can reach 60 meters; and when the shearing point reaches a 4# rolling mill, the tension is automatically reduced to 4 tons, after the mandrel of the shearing and splitting coiler is wound, the coiling tension is automatically recovered to a set value, and the strip steel cannot be scratched during splitting. The strip threading and tail throwing of the thick-specification steel plate and the tension rolling of the thin-specification steel plate can be realized in the rolling process.

The embodiment of the invention can also optimize the coil aid turns of the steel coil with the thickness of more than 2.5mm, and avoid the belt coil aid from being expanded or damaged.

In the above embodiments of the present invention, the thickness of the steel plate product is 1.5-3.5 mm, and the width is 900-1580 mm, preferably, the thickness of the steel plate product is 1.6mm, 2mm, 2.3mm, 2.5mm, 2.6mm, 2.7mm, 3mm, 3.1mm, 3.2mm, 3.3mm or 3.4 mm; the steel plate product outline is widened, the production conditions are stabilized, the process cost is reduced, and the product yield and the production efficiency are improved.

specifically, typical grades in the outline of steel plate products are: QSTE340TM, QSTE420TM, QSTE460TM, QSTE500TM, QSTE550TM, QSTE550TM, SAPH370, SAPH400, SAPH440, SS400-CL, LG380CL, LG490CL, LG510CL, LG530CL, LG590CL, DP600, SPFH590, S420MC, ST37-2, S500MC, DD11/12/13/14, SPH-YS, DP 600; the above-mentioned marks are only examples, and the steel plate product according to the embodiment of the present invention is not limited to the above-mentioned marks.

The embodiment of the invention also provides a control system for the full-automatic production of the pickled plate by the cold rolling unit, which adopts the control method for the full-automatic production of the pickled plate by the cold rolling unit, wherein the control system sequentially comprises an acid pickling process section, a rolling mill process section and a coiling process section according to the transportation route of the strip steel;

Wherein, the pickling process section is used for pickling the strip steel;

The rolling mill process section is used for transporting or rolling the pickled strip steel;

And the coiling process section is used for coiling the strip steel transported by the rolling mill.

preferably, an oil coating process is arranged between the pickling process section and the rolling mill process section.

Referring to fig. 2, the raw material is uncoiled by an uncoiler 1 and then is sequentially conveyed to a welding machine 2, an acid washing and rinsing tank 3, an oiling machine 4, a rolling mill and a crimping machine 7, and a steel plate product is obtained.

The present invention is not limited to the above preferred embodiments, and any modification, equivalent replacement and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.