CN104492816A - Method for cutting off and threading of strip steel - Google Patents

Method for cutting off and threading of strip steel Download PDF

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Publication number
CN104492816A
CN104492816A CN201410742142.5A CN201410742142A CN104492816A CN 104492816 A CN104492816 A CN 104492816A CN 201410742142 A CN201410742142 A CN 201410742142A CN 104492816 A CN104492816 A CN 104492816A
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China
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rolling
forebay
strip steel
band steel
roll
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CN201410742142.5A
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CN104492816B (en
Inventor
刘永振
陈甚超
路平
曹友良
相远茂
邓国宝
钱继刚
于海龙
任君茹
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BEIJING SHOUGANG COLD ROLLING THIN PLATE Co Ltd
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BEIJING SHOUGANG COLD ROLLING THIN PLATE Co Ltd
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Abstract

The invention discloses a method for cutting off and threading of strip steel, and belongs to the technical field of strip steel rolling in coupled pickling and tandem rolling. The method comprises the following steps: choosing strip steel to be halted, reducing a shunt winding cutting speed of the strip steel during shunt winding and cutting; shutting down a rolling mill after shunt cutting and shunting rolling at an outlet, reeling the cut strip steel and unreeling by using a reeling machine and lifting rolling gaps of all racks; choosing a current rack required for overhauling, withdrawing the strip steel by back running and stacking the strip steel to the front side of the current rack, and overhauling the current rack; threading the strip steel of the current rack into the current rack after the overhauling is completed, inching the current rack to thread forwards to ensure that the strip steel of the current rack returns to the position before the back running; tensioning the strip steel by using a pinch roll, pressing down the rolling gaps of all racks, and starting and rolling. According to the method, the rolling mill is started by using normal rolling strip steel instead of thick strip steel, the thickness fluctuation of the rolled steel coil is small and the thickness fluctuation part is positioned at the head of the strip steel, so that rolling wastes are reduced, and the finished product rate is increased.

Description

A kind of method of broken belt threading
Technical field
The invention belongs to pickling continuous-rolling strip steel rolling technical field, particularly a kind of method of broken belt threading.
Background technology
Pickling rolling production tape steel head and the tail link together, during maintenance need cut off band steel with facilitate staff enter milling train upkeep operation or change backing roll, upkeep operation terminate rear needs again threading open car rolling.Especially Thin Strip Steel and high-strength steel again threading to open the difficulty of car larger, often occur mandrel batch tightly cannot not to build, open car sideslip, band steel rolls the problems such as leakage, the operating efficiency of serious restriction pickling continuous rolling production line, simultaneously also can injury device, produce waste product cause tremendous economic to lose.
Broken belt threading method during tradition maintenance cuts off band steel (see Fig. 1) at inlet of rolling mill cross cutting scissors after milling train is shut down, and opens tandem mill roll gap, utilize coiling machine to batch the band steel of cut-out.After upkeep operation terminates, utilize the jockey pulley before tandem mill that hot rolling Deformation in thick is delivered to the coiling machine of milling train and outlet, then utilize coiling machine at the auxiliary last volume taut band steel of strap rolling-assisting device, screwdown continuous rolling mill roll gap, hot rolling Deformation in thick opens car.Open car rolling stable after, utilize the flying shear of Mill Exit to cut off band steel, continue rolling.Because the spring tape steel cut is hot-strip, be the astable rolled band steel of milling train in band, this coil of strip as waste disposal, can only cause certain economic loss.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of method of broken belt threading, easily produces steel scrap volume when solving threading in prior art, easily occurs that mandrel batches simultaneously and tightly cannot not to build, open car sideslip, opens car band steel and roll the technical problems such as leakage.
For solving the problems of the technologies described above, the invention provides a kind of method of broken belt threading, comprising the steps:
The band steel that selection will be shut down, during bundling, reduces the bundling shear rate of described band steel, and shears;
After outlet sub-cut bundling, milling train stops, and the band steel after coiling machine batches shearing also unloads volume, lifts the rolling roll gap of institute's organic frame;
What selection will be overhauled works as forebay, by reversing, described band steel is return and is stacked into described before forebay, then working as forebay maintenance to described;
After maintenance, the described band steel when before forebay is penetrated and describedly work as forebay, when forebay threading forward described in crawl, the position before making described band steel of working as forebay return to described reversing;
Make the tensioning of band steel by pinch roll, depress the roll gap of described institute organic frame, open car and rolling.
Further, the bundling shear rate of described band steel is reduced to 60m/min.
Further, before reversing, the described rolling roll gap when forebay of pressure, and reduce the described roll-force when forebay.
Further, described crawl, when before forebay forward threading, when the rolling roll gap of forebay described in pressure, and reduces the described roll-force when forebay.
Further, described in when opening car, mention the lower roll of described outlet pinch roll, outlet tension force formed to the described car that opens.
The method of broken belt threading provided by the invention, controls the position of lay-by steel by the shear rate reducing flying shear, avoid taking the lead to enter mandrel impact reversing; Make band steel bulk in frame before the frame wanting broken belt to overhaul by reversing, avoid the hot strip steel after breaking belt to open car; Export to build during by lifting outlet pinch roll and clamping and be with steel to assist and open car and open, ensure normally to open car.Compared to conventional method, the present invention is that normal rolled band steel opens car but not Deformation in thick opens car, and roll the little and thickness fluctuation part of rear coil of strip thickness fluctuation all at leader portion, convenient process, decreases milling waste and improve lumber recovery; Normally open car, the mandrel decreased when Deformation in thick opens car batches tightly cannot not to be built, open car sideslip, opens car band steel and roll the problems such as leakage, reduces equipment damage and rolling waste product.
Accompanying drawing explanation
Broken belt threading method schematic diagram during the pickling continuous rolling production line maintenance that Fig. 1 provides for prior art;
The method schematic diagram of a kind of broken belt threading that Fig. 2 provides for the embodiment of the present invention;
The method schematic diagram of the another kind of broken belt threading that Fig. 3 provides for the embodiment of the present invention;
Schematic diagram after the broken belt threading maintenance that Fig. 4 provides for the embodiment of the present invention terminates
Reference numeral:
1, be with steel, 2, cross cutting scissors, the 3, first frame, the 4, second frame, 5, the 3rd frame, 6, the 4th frame, the 7, the 5th frame, 8, outlet pinch roll, 9, flying shear, 10, coiling machine.
Detailed description of the invention
The method of a kind of broken belt threading that the embodiment of the present invention provides, comprises the steps:
Step 101: select the band steel that will shut down, during bundling, reduces: the bundling shear rate of band steel, and shears;
Step 102: after outlet sub-cut bundling, milling train stops, and the band steel after coiling machine batches shearing also unloads volume, lifts the rolling roll gap of institute's organic frame;
Step 103: what selection will be overhauled works as forebay, is made be with steel return by reversing and is stacked into before forebay, then overhauls when forebay;
Step 104: after maintenance, penetrates the band steel before worked as forebay and works as forebay, and crawl works as forebay threading forward, the position before making the band steel when forebay return to reversing;
Step 105: make the tensioning of band steel by pinch roll, the roll gap of institute of pressure institute organic frame, opens car and rolling.
In embodiments of the present invention, the bundling shear rate of described band steel is reduced minimum speed, this minimum speed is 60m/min, due to the minimum mill speed that speed 60m/min is milling train, the stopping distance short easy stop position of taking the lead when controlling to shear during minimum speed, reduces momentum before the inertia of band steel when stopping.
Wherein, before reversing, pressure is when the rolling roll gap of forebay, and the roll-force reduced when forebay, crawl is when before forebay forward threading, and pressure when the rolling roll gap of forebay, and reduces the roll-force when forebay, during such minimizing threading, frame is to the damage of belt steel surface, prevents thinning the avoiding of band steel from opening car accident.
Embodiment 1:
See Fig. 2, embodiments provide a kind of method of broken belt threading, comprise the steps:
Step 201: this milling train comprises the first frame 3, second frame the 4, three frame the 5, four frame, the 5th frame 7, wherein, milling train the 5th frame 7 needs broken belt to change backing roll.Shearing bundling speed when adjustment will shut down coil of strip and last coil of strip bundling is minimum speed 60m/min, and bundling sheared by flying shear 9, and the shear rate like this by reducing flying shear controls the position of lay-by steel, avoids taking the lead to enter mandrel impact reversing;
Step 202: after shear action completes, presses milling train orderly shutdown button and stops.Then manual crawl coiling machine 10 coiling band steel unload volume, lifts institute's organic frame Rolling roller seam;
Step 203: select the 5th frame 7 crawl reversing, the rolling roll gap depressing the 5th frame 7 is adjusted to minimum roll-force, utilize the draw of the 5th frame 7 that band steel 1 is return and be stacked into before the 5th frame 7, organize replacing the 5th frame 7 backing roll, like this, make band steel bulk in frame before the frame wanting broken belt to overhaul by reversing, avoid the hot strip steel after breaking belt to open car;
Step 204: threading again after replacing, lifts all frame roll gap, and human assistance penetrates the 5th frame 7 band steel 1, band steel 1 is through after the 5th frame 7, depress the rolling roll gap of the 5th frame 7 and select minimum roll-force, forward crawl the 5th frame 7, making band steel 1 through outlet pinch roll 8;
Step 205: mention outlet pinch roll 8 lower roll, utilize the power that pinches of pinch roll 8 to make band steel 1 tensioning, the position before making band steel 1 return to broken belt reversing, depresses all frame roll gap, presses milling train and opens car button and normally open car; When opening car, mentioning the lower roll of outlet pinch roll, forming outlet tension force to opening car.After band steel 1 enters mandrel for recoiling machine 10, manually fall pinch roll 8 lower roll, the normal rolling of production line, export tension force during by lifting outlet pinch roll and clamping and be with steel to assist and open car, ensure normally to open car.
The method of the broken belt threading that the embodiment of the present invention provides, compared with existing threading method, the present invention is that normal rolled band steel opens car but not Deformation in thick opens car, roll rear coil of strip thickness fluctuation little, and thickness fluctuation part is all at leader portion, convenient process, decreases milling waste and improves lumber recovery; When normally opening car, the mandrel decreased when Deformation in thick opens car batches tightly cannot not to be built, open car sideslip, opens car band steel and roll the problems such as leakage, reduces equipment damage and rolling waste product.
Embodiment 2:
See Fig. 3, embodiments provide a kind of method of broken belt threading, comprise the steps:
Step 301: this milling train comprises the first frame 3, second frame the 4, three frame the 5, four frame, the 5th frame 7, wherein, milling train the 3rd frame 5 needs broken belt to change backing roll.Shearing bundling speed when adjustment will shut down coil of strip and last coil of strip bundling is minimum speed 60m/min, and bundling sheared by flying shear 9, and the shear rate like this by reducing flying shear controls the position of lay-by steel, avoids taking the lead to enter mandrel impact reversing;
Step 302: after shear action completes, presses milling train orderly shutdown button and stops.Then manual crawl coiling machine 10 coiling band steel unload volume, lifts institute's organic frame Rolling roller seam;
Step 303: select the 3rd frame 5 crawl reversing, the rolling roll gap depressing the 3rd frame 5 is adjusted to minimum roll-force, utilize the draw of the 3rd frame 5 that band steel 1 is return and be stacked into before the 3rd frame 5, organize replacing the 3rd frame 5 backing roll, like this, make band steel bulk in frame before the frame wanting broken belt to overhaul by reversing, avoid the hot strip steel after breaking belt to open car;
Step 304: threading again after replacing, lifts all frame roll gap, and human assistance penetrates the 3rd frame 5 band steel 1, band steel 1 is through after the 3rd frame 5, depress the rolling roll gap of the 3rd frame 5 and select minimum roll-force, forward crawl the 3rd frame 5, making band steel 1 through outlet pinch roll 8;
Step 305: mention outlet pinch roll 8 lower roll, utilize the power that pinches of pinch roll 8 to make band steel 1 tensioning, the position before making band steel 1 return to broken belt reversing, depresses all frame roll gap, presses milling train and opens car button and normally open car; When opening car, mentioning the lower roll of outlet pinch roll, forming outlet tension force to opening car.After band steel 1 enters mandrel for recoiling machine 10, manually fall pinch roll 8 lower roll, the normal rolling of production line, export tension force during by lifting outlet pinch roll and clamping and be with steel to assist and open car, ensure normally to open car.
In the broken belt threading method of the embodiment of the present invention, broken belt maintenance frame is other frames except the first frame.If the first frame needs maintenance directly to use conventional method in inlet of rolling mill cross cutting scissors 2 place broken belt better effects if.
In broken belt threading method of the present invention, the exit thickness of broken belt band steel should be less than 1.2mm.Broken belt band steel needs to be deposited in before maintenance frame, and steel is too thick is inconvenient to pile up for band.And steel is too heavy not easily penetrates in frame for band during band steel too thick human assistance threading.
It should be noted last that, above detailed description of the invention is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to example to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims (5)

1. a method for broken belt threading, is characterized in that: comprise the steps:
The band steel that selection will be shut down, during bundling, reduces the bundling shear rate of described band steel, and shears;
After outlet sub-cut bundling, milling train stops, and the band steel after coiling machine batches shearing also unloads volume, lifts the rolling roll gap of institute's organic frame;
What selection will be overhauled works as forebay, by reversing, described band steel is return and is stacked into described before forebay, then working as forebay maintenance to described;
After maintenance, the described band steel when before forebay is penetrated and describedly work as forebay, when forebay threading forward described in crawl, the position before making described band steel of working as forebay return to described reversing;
Make the tensioning of band steel by pinch roll, depress the roll gap of described institute organic frame, open car and rolling.
2. method according to claim 1, is characterized in that: the bundling shear rate of described band steel is reduced to 60m/min.
3. method according to claim 1, is characterized in that: before reversing, the described rolling roll gap when forebay of pressure, and reduces the described roll-force when forebay.
4. method according to claim 1, is characterized in that: described crawl, when before forebay forward threading, when the rolling roll gap of forebay described in pressure, and reduces the described roll-force when forebay.
5. method according to claim 1, is characterized in that: described in when opening car, mention the lower roll of described outlet pinch roll, outlet tension force formed to the described car that opens.
CN201410742142.5A 2014-12-05 2014-12-05 A kind of method of broken belt threading Active CN104492816B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108700866A (en) * 2016-02-22 2018-10-23 首要金属科技奥地利有限责任公司 The on-line calibration of the roll gap of rolling-mill housing
CN109423552A (en) * 2017-08-25 2019-03-05 鞍钢股份有限公司 A kind of method of quick extraction continuous annealing strip
CN109576481A (en) * 2017-09-28 2019-04-05 上海梅山钢铁股份有限公司 Reversed threading control method in vertical continuous annealing furnace furnace

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Publication number Priority date Publication date Assignee Title
JP2000271611A (en) * 1999-03-25 2000-10-03 Kawasaki Steel Corp Method for joining sheet bar and device therefor
JP2000301209A (en) * 1999-04-20 2000-10-31 Nippon Steel Corp Method for joining steel strip for continuous rolling
KR20050026302A (en) * 2003-09-09 2005-03-15 주식회사 포스코 Device for prevention buckling of workpiece in break down mill
CN102319737A (en) * 2011-06-04 2012-01-18 首钢总公司 Method for connecting broken thin strip steels on continuous production line
CN103212576A (en) * 2013-03-30 2013-07-24 马钢(集团)控股有限公司 Fast threading method for broken strip of withdrawal and straightening machine
JP2014014864A (en) * 2012-07-11 2014-01-30 Jfe Steel Corp Metal plate joint device and metal plate joint method
CN103785694A (en) * 2013-11-22 2014-05-14 首钢总公司 Method for preventing strip breakage on startup
CN104148383A (en) * 2014-06-28 2014-11-19 济钢集团有限公司 Closed roller gap threading and rolling method for double-rack cold-rolling mill

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000271611A (en) * 1999-03-25 2000-10-03 Kawasaki Steel Corp Method for joining sheet bar and device therefor
JP2000301209A (en) * 1999-04-20 2000-10-31 Nippon Steel Corp Method for joining steel strip for continuous rolling
KR20050026302A (en) * 2003-09-09 2005-03-15 주식회사 포스코 Device for prevention buckling of workpiece in break down mill
CN102319737A (en) * 2011-06-04 2012-01-18 首钢总公司 Method for connecting broken thin strip steels on continuous production line
JP2014014864A (en) * 2012-07-11 2014-01-30 Jfe Steel Corp Metal plate joint device and metal plate joint method
CN103212576A (en) * 2013-03-30 2013-07-24 马钢(集团)控股有限公司 Fast threading method for broken strip of withdrawal and straightening machine
CN103785694A (en) * 2013-11-22 2014-05-14 首钢总公司 Method for preventing strip breakage on startup
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108700866A (en) * 2016-02-22 2018-10-23 首要金属科技奥地利有限责任公司 The on-line calibration of the roll gap of rolling-mill housing
CN109423552A (en) * 2017-08-25 2019-03-05 鞍钢股份有限公司 A kind of method of quick extraction continuous annealing strip
CN109423552B (en) * 2017-08-25 2020-09-01 鞍钢股份有限公司 Method for rapidly extracting continuous annealing strip steel
CN109576481A (en) * 2017-09-28 2019-04-05 上海梅山钢铁股份有限公司 Reversed threading control method in vertical continuous annealing furnace furnace

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