CN102784803A - 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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- CN102784803A CN102784803A CN2011101354885A CN201110135488A CN102784803A CN 102784803 A CN102784803 A CN 102784803A CN 2011101354885 A CN2011101354885 A CN 2011101354885A CN 201110135488 A CN201110135488 A CN 201110135488A CN 102784803 A CN102784803 A CN 102784803A
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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 to the control method to being with steel to cut edge on a kind of cold continuous rolling, belong to the 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 is through the welding machine welding, with the continuity that guarantees to produce.Quality of edges in order to ensure the milling train outlet; Central sections in sour milling train group; Rotary shear equipment is installed, and the garden dish is cut the shearing that is used for strip edge portion, and (strip edge portion cuts 10～20mm) usually, to eliminate strip edge portion defective and the band steel target width that satisfies contract requirement.Usually cut equipment crescent moon also being installed before the circle shear, crescent moon is cut and is used for going out the groove mouth in the commissure of front and back band steel and washing away wedge angle, cuts the both sides cutter head and gets into the stress of cutting edge and can eliminate front and back band steel joint edge portion place and concentrate to adapt to the garden dish.
Existing crescent moon is cut normally and is carried out trimming in the commissure of front and back band steel, and crescent moon trimming (also making crescent moon bend) dark (every side blow limit 120mm) can be guaranteed with the utilization rate end to end of steel the highest like this.It also is to cut edge in the commissure of front and back band steel that existing garden dish is cut usually.But, find that in actual production process bad if weldquality has slightly, existing this crescent moon trimming can make the commissure narrow down at width, according to the computing formula Q of tensile strength
b=F/S (F is for being with the maximum pull that can bear before the steel fracture, and S is the sectional area of band steel), under the situation that sectional area S reduces in that maximum pull F is constant, the commissure tensile strength of front and back band steel diminishes.Therefore, when the weld seam of front and back band steel is crossed milling train, because mill interstand tension is very big, the phenomenon that tear the commissure often taking place, cause being with steel broken belt and rolls damage, has a strong impact on the performance of milling train steady production and production capacity.
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, and this method is utilized the existing seam tracking system of cold continuous rolling, accurately measures the position while welding of band steel; In the 50 meters scopes in weld seam front and back; The 1.0-1.5 that belt steel thickness is increased to former target thickness doubly and realizes that through two wedge rolling processes local dynamic thickening is rolling, the broken belt rate when reducing thin material and producing.In addition application number is that 200410017246.6 Chinese patent discloses a kind of method that prevents band steel broken belt in the continuous annealing process; This method had promptly been measured the belt plate shape situation before getting into annealing furnace; Plate speed, tension force and the deviation adjustment angle of steel is with in control in time, to avoid the generation of broken belt accident.More than two patents all be control parameters such as control thickness, speed, tension force through control band steel, reaches and reduce the purpose that broken belt takes place, but that its technology realizes is complicated, cost is higher.
Summary of the invention
The technical problem of the present invention's solution is: propose a kind of simple effectively control cold continuous rolling and carry out the method for sheared edge to being with steel, with the generation of minimizing band 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 side cut control method, on existing cold continuous rolling production line, utilize existing L1 basis control system and L2 Process Control System; Set two kinds of crescent moon trimmings earlier, 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 trimming degree of depth is the big crescent moon trimming of 120mm; Crescent moon cut with circle shear controls as follows:
When 1) the strip width difference before and after the weld seam was at 0-75mm, the control crescent moon was cut in the commissure and is carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge in the commissure;
When 2) the strip width difference before and after the weld seam is greater than 75mm,
If the A front and back band steel is beloid, the control crescent moon is cut on the ribbon steel at 1050 ± 30mm place before weld seam and is carried out solar month of 30 days tooth trimming, controls on the ribbon steel at circle shear 1150 ± 30mm place before weld seam and cuts edge;
If the B front and back band steel is front wide and rear narrow, the control crescent moon is cut and on the ribbon steel at 850 ± 30mm place behind the weld seam, is carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge on the ribbon steel at 750 ± 30mm place behind the weld seam;
3) except above three kinds the situation, the control crescent moon is cut in the commissure and is carried out big crescent moon trimming, and the control circle shear is cut edge in the commissure.
Cold continuous rolling band steel side cut control method of the present invention is carried out the defective that big crescent moon trimming and trimming technology bring to existing single in band steel commissure; Creatively propose solar month of 30 days tooth trimming and come to judge respectively and adjust crescent moon and cut trimming position, the degree of depth and circle shear side cut position according to weld seam front and back band steel stand out; Thereby the beneficial effect that forms is: there is enough tensile strength the commissure when guaranteeing to cross milling train with steel, stops to be with steel to produce broken belt in the commissure.
The perfect of technique scheme is: 18 meters are equipped with the Detecting Welding Seam device that is used to proofread and correct the physical location of being with steel before said crescent moon is cut; Cutting 25 meters at the weld pitch crescent moon, to control the speed of band steel be 60 meters/minute, cuts 15 meters at the weld pitch crescent moon and control the speed of band steel and drop to 15 meters/minute, cuts 0.468 meter at the weld pitch crescent moon and control the speed of band steel and drop to 0, and crescent moon is cut off beginning crescent moon trimming; After trimming finishes, restart the control strip speed and be raised to 60 meters/minute, the speed of controlling the band steel at 10 meters of weld pitch circle shear is 15 meters/minute, drops to 0 in the speed of controlling the band steel apart from 0.468 meter of circle shear, and circle shear begins to cut edge.
Description of drawings
Below in conjunction with accompanying drawing cold continuous rolling side cut control method of the present invention is described further.
Fig. 1 is big crescent moon trimming degree of depth sketch map.
Fig. 2 is a solar month of 30 days tooth trimming degree of depth sketch map.
Fig. 3 is that crescent moon is cut one of trimming position, the degree of depth and circle shear side cut position view in the control method of the specific embodiment of the invention.
Fig. 4 is that crescent moon is cut two of trimming position, the degree of depth and circle shear side cut position view in the control method of the specific embodiment of the invention.
Fig. 5 is that crescent moon is cut three of trimming position, the degree of depth and circle shear side cut position view in the control method of the specific embodiment of the invention.
Fig. 6 is that crescent moon is cut four of trimming position, the degree of depth and circle shear side cut position view in the control method of the specific embodiment of the invention.
The specific embodiment
The cold continuous rolling band steel side cut control method of this specific embodiment is on existing cold continuous rolling production line, to utilize existing L1 basis control system and L2 Process Control System; Set two kinds of crescent moon trimmings earlier, 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 trimming degree of depth is the big crescent moon trimming of 120mm; Crescent moon cut with circle shear controls as follows:
1) as shown in Figure 3, the strip width difference before and after the weld seam is during at 0-75mm, and the control crescent moon is cut in the commissure and carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge in the commissure;
When 2) the strip width difference before and after the weld seam is greater than 75mm,
As shown in Figure 4, if front and back band steel is beloid, the control crescent moon is cut on the ribbon steel at 1050 ± 30mm place before weld seam and is carried out solar month of 30 days tooth trimming, controls on the ribbon steel at circle shear 1150 ± 30mm place before weld seam and cuts edge;
As shown in Figure 5, if front and back band steel is front wide and rear narrow, the control crescent moon is cut and on the ribbon steel at 850 ± 30mm place behind the weld seam, is carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge on the ribbon steel at 750 ± 30mm place behind the weld seam;
3) as shown in Figure 6, except above three kinds the situation then by existing technology, promptly control crescent moon and cut in the commissure and carry out big crescent moon trimming, the control circle shear is cut edge in the commissure.
Need to replenish perfect having (prior art) in the control method of this specific embodiment:
1) about 18 meters before crescent moon is cut equipment, field joint position detecting device (WPD), the physical location that is used to proofread and correct the band steel, the realization crescent moon is cut the accurate location of trimming position.
2) cutting 25 meters at the weld pitch crescent moon, to control the speed of band steel be 60 meters/minute, cuts 15 meters at the weld pitch crescent moon and control the speed of band steel and drop to 15 meters/minute, cuts 0.468 meter at the weld pitch crescent moon and control the speed of band steel and drop to 0, and crescent moon is cut off beginning crescent moon trimming.
3) after trimming finishes, restart the control strip speed and be raised to 60 meters/minute, the speed of controlling the band steel at 10 meters of weld pitch circle shear is 15 meters/minute, drops to 0 in the speed of controlling the band steel apart from 0.468 meter of circle shear, and circle shear begins to cut edge.
Cold continuous rolling circle shear side cut control method of the present invention is not limited to the described concrete technical scheme of the foregoing description, 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 side cut control method on existing cold continuous rolling production line, is utilized existing L1 basis control system and L2 Process Control System; It is characterized in that: set two kinds of crescent moon trimmings earlier, 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 trimming degree of depth is the big crescent moon trimming of 120mm; Crescent moon cut with circle shear controls as follows:
When 1) the strip width difference before and after the weld seam was at 0-75mm, the control crescent moon was cut in the commissure and is carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge in the commissure;
When 2) the strip width difference before and after the weld seam is greater than 75mm,
If the A front and back band steel is beloid, the control crescent moon is cut on the ribbon steel at 1050 ± 30mm place before weld seam and is carried out solar month of 30 days tooth trimming, controls on the ribbon steel at circle shear 1150 ± 30mm place before weld seam and cuts edge;
If the B front and back band steel is front wide and rear narrow, the control crescent moon is cut and on the ribbon steel at 850 ± 30mm place behind the weld seam, is carried out solar month of 30 days tooth trimming, and the control circle shear is cut edge on the ribbon steel at 750 ± 30mm place behind the weld seam;
3) except above three kinds the situation, the control crescent moon is cut in the commissure and is carried out big crescent moon trimming, and the control circle shear is cut edge in the commissure.
2. according to the said cold continuous rolling band of claim 1 steel side cut control method, it is characterized in that: 18 meters are equipped with the Detecting Welding Seam device that is used to proofread and correct the physical location of being with steel before said crescent moon is cut; Cutting 25 meters at the weld pitch crescent moon, to control the speed of band steel be 60 meters/minute, cuts 15 meters at the weld pitch crescent moon and control the speed of band steel and drop to 15 meters/minute, cuts 0.468 meter at the weld pitch crescent moon and control the speed of band steel and drop to 0, and crescent moon is cut off beginning crescent moon trimming; After trimming finishes, restart the control strip speed and be raised to 60 meters/minute, the speed of controlling the band steel at 10 meters of weld pitch circle shear is 15 meters/minute, drops to 0 in the speed of controlling the band steel apart from 0.468 meter of circle shear, and circle shear begins to cut edge.
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 |
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| 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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| CN102784803A true CN102784803A (en) | 2012-11-21 |
| CN102784803B CN102784803B (en) | 2014-10-29 |
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Cited By (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 |
| CN104438934A (en) * | 2014-11-07 | 2015-03-25 | 安徽马钢自动化信息技术有限公司 | Strip steel welding seam positioning system and method |
| CN109014646A (en) * | 2017-06-09 | 2018-12-18 | 上海梅山钢铁股份有限公司 | The method for preventing the disconnected band of thin material strip steel weld joint |
| CN109692876A (en) * | 2018-12-29 | 2019-04-30 | 中冶南方工程技术有限公司 | A kind of width notcher is to the control method with steel edge-punching |
| 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 |
| 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 |
| CN110744228A (en) * | 2019-10-11 | 2020-02-04 | 马鞍山钢铁股份有限公司 | Strip steel welding method |
| CN112893477A (en) * | 2019-11-19 | 2021-06-04 | 上海梅山钢铁股份有限公司 | Hot-rolled pickled plate reduction trimming amount control method |
| 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 |
| 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 |
| CN114054512A (en) * | 2020-08-03 | 2022-02-18 | 上海梅山钢铁股份有限公司 | Pickling plate thickness data home-entry method |
| CN114700372A (en) * | 2022-03-02 | 2022-07-05 | 首钢京唐钢铁联合有限责任公司 | Method for controlling speed of rolling mill of continuous rolling mill train 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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Cited By (15)
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| 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 |
| CN104438934A (en) * | 2014-11-07 | 2015-03-25 | 安徽马钢自动化信息技术有限公司 | Strip steel welding seam positioning system and method |
| CN109014646A (en) * | 2017-06-09 | 2018-12-18 | 上海梅山钢铁股份有限公司 | The method for preventing the disconnected band of thin material strip steel weld joint |
| 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 |
| CN109692876A (en) * | 2018-12-29 | 2019-04-30 | 中冶南方工程技术有限公司 | A kind of width notcher is to the control method with steel edge-punching |
| 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 |
| CN112893477A (en) * | 2019-11-19 | 2021-06-04 | 上海梅山钢铁股份有限公司 | Hot-rolled pickled plate reduction trimming amount control method |
| 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 |
| CN114054512A (en) * | 2020-08-03 | 2022-02-18 | 上海梅山钢铁股份有限公司 | Pickling plate thickness data home-entry method |
| 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 |
| CN114700372A (en) * | 2022-03-02 | 2022-07-05 | 首钢京唐钢铁联合有限责任公司 | Method for controlling speed of rolling mill of continuous rolling mill train and related equipment |
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