CN102784803B - Cold tandem mill strip steel edge trimming controlling method - Google Patents
Cold tandem mill strip steel edge trimming controlling method Download PDFInfo
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- CN102784803B CN102784803B CN201110135488.5A CN201110135488A CN102784803B CN 102784803 B CN102784803 B CN 102784803B CN 201110135488 A CN201110135488 A CN 201110135488A CN 102784803 B CN102784803 B CN 102784803B
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Abstract
The invention relates to a cold tandem mill strip steel edge trimming controlling method and belongs to the technical field of cold tandem rolling devices. According to the method, based on existing cold tandem mill lines, a small crescent punched edge with a punched edge depth of 70mm and a large crescent punched edge with a punched edge depth of 120mm are set; when the width difference of strip steel in the front and rear of a welding seam is in a range from 0mm to 75mm, a notcher is controlled to perform a small crescent edge punching at a position of the welding seam, and a circle shear is controlled to perform an edge trimming at the position of the welding seam; when the width difference of strip steel in the front and rear of the welding seam is larger than 75mm and the front and back strip steel is narrow in front and wide in back, the notcher is controlled to perform the small crescent edge punching at a position 1050+/-30mm in the front of the welding seam, and the circle shear is controlled to perform the edge trimming at a position 1150+/-30mm in the front of the welding seam; if the front and back strip steel is wide in front and narrow in back, the notcher is controlled to perform the small crescent edge punching at a position 850+/-30mm in the rear of the welding seam, and the circle shear is controlled to perform the edge trimming at a position 750+/-30mm in the rear of the welding seam; and otherwise existing processes are performed. According to the method, the small crescent edge punching is innovated, the edge punching position and depth of the notcher and the edge trimming position of the circle shear are respectively judged and adjusted according to the width difference of strip steel in the front and rear of the welding seam, and thereby a sufficient tensile strength of the strip steel at the position of the welding seam can be guaranteed so as to prevent strip breakage.
Description
Technical field
The present invention relates on a kind of cold continuous rolling, to carry out the control method of trimming with steel, to belong to continuous cold-rolling equipment technical field.
Background technology
In the sour milling train group production process of cold continuous rolling, front and back band steel welds by welding machine, with the continuity that ensures to produce.In order to ensure the quality of edges of milling train outlet, in the central sections of sour milling train group, rotary shear equipment is installed, and circle shear is for the shearing (steel edge portion is cut 10～20mm conventionally) of steel edge portion, to eliminate side defects of strip steel and the band steel target width that meets contract requirement.Conventionally width notcher equipment had also been installed before circle shear, width notcher is for going out groove mouth in the commissure of front and back band steel and washing away wedge angle, concentrates to adapt to the stress that circle shear both sides cutter head enters trimming and can eliminate place of front and back band steel joint edge portion.
Existing width notcher normally carries out trimming in the commissure of front and back band steel, and crescent moon trimming (also cry crescent moon curved) is dark (every side blow limit 120mm), can guarantee like this with the utilization rate end to end of steel the highest.Existing circle shear is also to carry out trimming in the commissure of front and back band steel conventionally.But, in actual production process, find, if weldquality is slightly bad, existing this crescent moon trimming can make commissure narrow at width, according to the computing formula Q of tensile strength
b=F/S (F is the maximum pull with can bear before steel fracture, and S is the sectional area with steel), in the situation that the constant and sectional area S of maximum pull F reduces, the commissure tensile strength of front and back band steel diminishes.Therefore, in the time that the weld seam of front and back band steel is crossed milling train, because mill interstand tension is very large, often there is the phenomenon that tear commissure, cause being with steel broken belt and rolls damage, have a strong impact on milling train steady production and production capacity performance.
Through retrieval, application number is that 200510046497.1 Chinese patent discloses a kind of dynamic thickening rolling process of controlling break of cold rolled thin strip steel, the method is utilized the existing seam tracking system of cold continuous rolling, the position while welding of Measurement accuracy band steel, before and after the weld seam within the scope of 50 meters, the 1.0-1.5 that belt steel thickness is increased to former target thickness doubly, and realizes local dynamic station by two wedge rolling processes and thickens rolling, the broken belt rate when reducing thin material and producing.The Chinese patent that another application number is 200410017246.6 discloses a kind of method with steel broken belt in continuous annealing process that prevents, the method had measured belt plate shape situation before entering annealing furnace, control in time plate speed, tension force and the deviation adjustment angle with steel, to avoid the generation of broken belt accident.Above two patents are all that the control thickness with steel, speed, tension force etc. are controlled parameter by control, reach and reduce the object that broken belt occurs, but its technique realizes complexity, cost is higher.
Summary of the invention
The technical problem that the present invention solves is: propose a kind of simple cold continuous rolling of effectively controlling to carry out the method for sheared edge with steel, to reduce the generation with steel broken belt, and reduce operating cost.
In order to solve the problems of the technologies described above, the technical scheme that the present invention proposes is: a kind of cold continuous rolling band steel trimming control method, on existing cold continuous rolling production line, utilize existing L1 base control system and L2 Process Control System; First set two kinds of crescent moon trimmings, a kind of is that the trimming degree of depth is the solar month of 30 days tooth trimming of 70mm, the 2nd, and the large crescent moon trimming that the trimming degree of depth is 120mm; Control as follows to width notcher and circle shear:
1) strip width before and after the weld seam is poor during at 0-75mm, controls width notcher and carries out solar month of 30 days tooth trimming in commissure, controls circle shear and carries out trimming in commissure;
2) strip width before and after the weld seam is poor while being greater than 75mm,
If A front and back band steel is beloid, on the ribbon steel at control width notcher 1050 ± 30mm place before weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 1150 ± 30mm place before weld seam, carry out trimming;
If B front and back band steel is front wide and rear narrow, on the ribbon steel at control width notcher 850 ± 30mm place after weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 750 ± 30mm place after weld seam, carry out trimming.
Cold continuous rolling band steel trimming control method of the present invention is carrying out for existing single the defect that large crescent moon trimming and trimming technology bring with steel commissure, creatively propose solar month of 30 days tooth trimming and judge respectively and adjust width notcher trimming position, the degree of depth and circle shear trimming position according to weld seam front and back band steel stand out, thereby the beneficial effect forming is: while guaranteeing to cross milling train with steel, there is enough tensile strength commissure, stops to be with steel to produce broken belt in commissure.
Technique scheme perfect: 18 meters of are provided with the detecting device for welding joint position for the physical location of correction tape steel before described width notcher; The speed of controlling with steel at 25 meters of of weld pitch width notcher is 60 ms/min, controls and drops to 15 ms/min with the speed of steel at 15 meters of of weld pitch width notcher, controls and drops to 0 with the speed of steel at 0.468 meter of of weld pitch width notcher, and width notcher starts crescent moon trimming; After trimming finishes, restart control strip speed and be raised to 60 ms/min, the speed of controlling with steel at 10 meters of of weld pitch circle shear is 15 ms/min, is controlling and is dropping to 0 with the speed of steel apart from 0.468 meter of of circle shear, and circle shear starts trimming.
Brief description of the drawings
Below in conjunction with accompanying drawing, cold continuous rolling trimming control method of the present invention is described further.
Fig. 1 is large crescent moon trimming degree of depth schematic diagram.
Fig. 2 is solar month of 30 days tooth trimming degree of depth schematic diagram.
Fig. 3 is one of width notcher trimming position in the control method of the specific embodiment of the invention, the degree of depth and circle shear trimming position view.
Fig. 4 is two of width notcher trimming position in the control method of the specific embodiment of the invention, the degree of depth and circle shear trimming position view.
Fig. 5 is three of width notcher trimming position in the control method of the specific embodiment of the invention, the degree of depth and circle shear trimming position view.
Fig. 6 is four of width notcher trimming position in the control method of the specific embodiment of the invention, the degree of depth and circle shear trimming position view.
Detailed description of the invention
The cold continuous rolling band steel trimming control method of this detailed description of the invention is, on existing cold continuous rolling production line, to utilize existing L1 base control system and L2 Process Control System; First set two kinds of crescent moon trimmings, as depicted in figs. 1 and 2, a kind of is that the trimming degree of depth is the solar month of 30 days tooth trimming of 70mm, the 2nd, and the large crescent moon trimming that the trimming degree of depth is 120mm; Control as follows to width notcher and circle shear:
1) as shown in Figure 3, strip width before and after the weld seam is poor during at 0-75mm, controls width notcher and carries out solar month of 30 days tooth trimming in commissure, controls circle shear and carries out trimming in commissure;
2) strip width before and after the weld seam is poor while being greater than 75mm,
As shown in Figure 4, if front and back band steel is beloid, on the ribbon steel at control width notcher 1050 ± 30mm place before weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 1150 ± 30mm place before weld seam, carry out trimming;
As shown in Figure 5, if front and back band steel is front wide and rear narrow, on the ribbon steel at control width notcher 850 ± 30mm place after weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 750 ± 30mm place after weld seam, carry out trimming;
3) as shown in Figure 6, except above three kinds of situations, by existing technique, control width notcher and carry out large crescent moon trimming in commissure, control circle shear and carry out trimming in commissure.
In the control method of this detailed description of the invention, need to supplement perfect having (prior art):
1) approximately 18 meters of before width notcher equipment, field joint position detecting device (WPD), for the physical location of correction tape steel, realizes the accurate location of width notcher trimming position.
2) speed of controlling with steel at 25 meters of of weld pitch width notcher is 60 ms/min, control and drop to 15 ms/min with the speed of steel at 15 meters of of weld pitch width notcher, control and drop to 0 with the speed of steel at 0.468 meter of of weld pitch width notcher, width notcher starts crescent moon trimming.
3) after trimming finishes, restart control strip speed and be raised to 60 ms/min, the speed of controlling with steel at 10 meters of of weld pitch circle shear is 15 ms/min, is controlling and is dropping to 0 with the speed of steel apart from 0.468 meter of of circle shear, and circle shear starts trimming.
Cold continuous rolling circle shear trimming control method of the present invention is not limited to the concrete technical scheme described in above-described embodiment, and the technical scheme that all employings are equal to replacement formation is the protection domain that the present invention requires.
Claims (2)
1. a cold continuous rolling band steel trimming control method, on existing cold continuous rolling production line, utilizes existing L1 base control system and L2 Process Control System; It is characterized in that: first set two kinds of crescent moon trimmings, a kind of is that the trimming degree of depth is the solar month of 30 days tooth trimming of 70mm, the 2nd, the large crescent moon trimming that the trimming degree of depth is 120mm; Control as follows to width notcher and circle shear:
1) strip width before and after the weld seam is poor during at 0-75mm, controls width notcher and carries out solar month of 30 days tooth trimming in commissure, controls circle shear and carries out trimming in commissure;
2) strip width before and after the weld seam is poor while being greater than 75mm,
If A front and back band steel is beloid, on the ribbon steel at control width notcher 1050 ± 30mm place before weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 1150 ± 30mm place before weld seam, carry out trimming;
If B front and back band steel is front wide and rear narrow, on the ribbon steel at control width notcher 850 ± 30mm place after weld seam, carry out solar month of 30 days tooth trimming, on the ribbon steel at control circle shear 750 ± 30mm place after weld seam, carry out trimming.
2. cold continuous rolling band steel trimming control method according to claim 1, is characterized in that: before described width notcher, 18 meters of are provided with the detecting device for welding joint position for the physical location of correction tape steel; The speed of controlling with steel at 25 meters of of weld pitch width notcher is 60 ms/min, controls and drops to 15 ms/min with the speed of steel at 15 meters of of weld pitch width notcher, controls and drops to 0 with the speed of steel at 0.468 meter of of weld pitch width notcher, and width notcher starts crescent moon trimming; After trimming finishes, restart control strip speed and be raised to 60 ms/min, the speed of controlling with steel at 10 meters of of weld pitch circle shear is 15 ms/min, is controlling and is dropping to 0 with the speed of steel apart from 0.468 meter of of circle shear, and circle shear starts trimming.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110135488.5A CN102784803B (en) | 2011-05-20 | 2011-05-20 | Cold tandem mill strip steel edge trimming controlling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110135488.5A CN102784803B (en) | 2011-05-20 | 2011-05-20 | Cold tandem mill strip steel edge trimming controlling method |
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| Publication Number | Publication Date |
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| CN102784803A CN102784803A (en) | 2012-11-21 |
| CN102784803B true CN102784803B (en) | 2014-10-29 |
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| CN201110135488.5A Expired - Fee Related CN102784803B (en) | 2011-05-20 | 2011-05-20 | Cold tandem mill strip steel edge trimming controlling method |
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Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104289523A (en) * | 2014-09-15 | 2015-01-21 | 首钢京唐钢铁联合有限责任公司 | Control method for improving belt breakage in dynamic specification changing process |
| CN104438934B (en) * | 2014-11-07 | 2016-03-23 | 安徽马钢自动化信息技术有限公司 | A kind of strip steel weld joint navigation system and method |
| CN109014646B (en) * | 2017-06-09 | 2021-02-05 | 上海梅山钢铁股份有限公司 | Method for preventing strip breakage of thin strip steel welding seam |
| CN109692876B (en) * | 2018-12-29 | 2020-12-08 | 中冶南方工程技术有限公司 | Control method for strip steel edge punching by crescent shears |
| CN110209112A (en) * | 2019-05-27 | 2019-09-06 | 北京首钢自动化信息技术有限公司 | A kind of autocontrol method of width notcher feed size |
| CN110744228A (en) * | 2019-10-11 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Strip steel welding method |
| CN110695444A (en) * | 2019-10-21 | 2020-01-17 | 山东钢铁集团日照有限公司 | Welding seam processing method for secondary shearing crescent of continuous strip steel production line |
| CN112893477B (en) * | 2019-11-19 | 2022-05-10 | 上海梅山钢铁股份有限公司 | Hot-rolled pickled plate reduction trimming amount control method |
| CN113926863A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Strip steel speed control method and electronic equipment and medium thereof |
| CN114054512B (en) * | 2020-08-03 | 2024-09-06 | 上海梅山钢铁股份有限公司 | Method for returning thickness data of pickled plate to home |
| CN113020696A (en) * | 2021-03-23 | 2021-06-25 | 攀钢集团西昌钢钒有限公司 | Edge digging depth adjusting method and device, edge digging shearing method and edge digging shears |
| CN113843281A (en) * | 2021-08-31 | 2021-12-28 | 天津市新天钢冷轧薄板有限公司 | Control method for improving quality of edge of hard-rolled coil |
| CN114700372B (en) * | 2022-03-02 | 2024-08-27 | 首钢京唐钢铁联合有限责任公司 | Rolling mill speed control method of continuous rolling mill unit and related equipment |
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| CN101658956A (en) * | 2008-08-29 | 2010-03-03 | 上海宝信软件股份有限公司 | Method and system for controlling shutdown position of band steel welded seam at cold-rolling rotary cutter |
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