CN1775390A - Medium-thick plate production process - Google Patents

Medium-thick plate production process Download PDF

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Publication number
CN1775390A
CN1775390A CN 200510032521 CN200510032521A CN1775390A CN 1775390 A CN1775390 A CN 1775390A CN 200510032521 CN200510032521 CN 200510032521 CN 200510032521 A CN200510032521 A CN 200510032521A CN 1775390 A CN1775390 A CN 1775390A
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China
Prior art keywords
steel plate
cut
surely
fluid pressure
pressure type
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CN 200510032521
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Chinese (zh)
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CN100374218C (en
Inventor
郑龙弟
江业泰
郭同铀
高青
罗祯伟
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广东韶钢松山股份有限公司
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Priority to CNB2005100325216A priority Critical patent/CN100374218C/en
Publication of CN1775390A publication Critical patent/CN1775390A/en
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Publication of CN100374218C publication Critical patent/CN100374218C/en

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Abstract

The present invention relates to a production process of heavy and medium plate. Said process includes the following steps: heating slab, removing scale, rolling by using rolling mill, laminar flow cooling, thermal straightening by using heat straightening machine, trimming by using trimming shear and cut-to-length by using cut-to-length shear.

Description

A kind of Heavy Plate Production technology
[technical field]
The present invention relates to a kind of Heavy Plate Production technology, relate in particular to a kind of Heavy Plate Production technology that the plurality of specifications blank is produced that adapts to.
[background technology]
At present, the existing wide heavy and medium plate mill production line technological process of production generally is: continuous casting steel billet → bar plate heating stove heating → de-scaling → mill milling → laminar flow cooling → steel plate thermal straightening machine leveling → cold bed cooling → end trimming shears side cut → scale is cut cut-to-length → mark jet printing → finished product collection and treatment, this technological process is when selecting the long blank of big substance for use, intermediate products behind the mill milling can not successfully be delivered to cold bed greatly because of size, thereby the adaptable blank specification limit of this technology institute is less, the production efficiency of milling train is lower, and the scale hit rate is low and cutting head cutting tail amount considerable influence steel recovery rate;
For solving long size blank problem, during existing producer newly-built wide heavy and medium plate mill production line, a flying shear is installed behind four-high mill, when the long blank of selecting big substance for use is produced, intermediate products behind the mill milling are cut, guarantee that the intermediate products after rolling serve cold bed smoothly, but the investment of flying shear is big, the investment of a flying shear needs 3,000 ten thousand yuan approximately, and shear ability is restricted, generally can only shearing thickness less than 25mm, width is less than the mill milling product of 2500mm, particularly carry out when long slab is cut long steel plate being stopped with flying shear, make random length according to the intermediate products camber situation after rolling and shear, influence finished product side cut back steel recovery rate.
[summary of the invention]
In order to overcome the above-mentioned shortcoming of prior art, the invention provides and a kind ofly can adapt to the production of plurality of specifications blank and small investment, can make the Heavy Plate Production technology that random length is sheared, the steel recovery rate is high according to the intermediate products camber situation after rolling.
The technical solution adopted for the present invention to solve the technical problems is: a kind of Heavy Plate Production technology, comprise that slab heating, de-scaling, mill milling, laminar flow cooling, thermal straightening machine leveling, end trimming shears are cut edge and scale is cut scale, before the cold bed inlet fluid pressure type heat being installed cuts surely, when steel plate after the thermal straightening machine leveling, according to rolling back steel plate length, surely cut the head that cuts off the fish tail shape automatically and cut into less than the motherboard of cold bed length and serve cold bed and cool off by fluid pressure type heat, carry toward end trimming shears by roller-way through cooled steel plate and cut edge.
The cut mode that described fluid pressure type heat is cut surely is to be provided with three kinds of total plate cutting modes according to the overall length of steel plate and temperature, is respectively: directly forward, forward, backward.
Describedly directly be forward: first is cut to crop, is the scale cutting then.
Describedly be forward: when detecting steel plate head at the thermal straightening machine outlet side, fluid pressure type heat is cut surely and is predetermined to be pass-through mode, after steel plate aligning process is finished, thermal straightening machine is opened, steel plate is cut the front at scale and is moved backward and begin and vibrate before the cutter pinch roll, fluid pressure type heat is cut surely and is preset as cutting steel plate, then with the direct cutting sequence that mode is the same forward steel plate is cut.
Describedly be backward: first is cut to scale cuts, and is every block of steel plate less than 41.5m with the total plate cutting of steel plate, and the steel plate that is positioned at the cutter downstream moves and begins vibration to the slow cooling runout table, and the steel plate that fluid pressure type heat is cut the upstream surely cuts simultaneously; After steel plate that fluid pressure type heat is cut the upstream surely was cut, corresponding motherboard had been sent to cold bed, and fluid pressure type heat is cut surely and is set to pass-through mode, was parked in steel plate on the slow cooling roller-way simultaneously and was moved back into the cutter front and begins and vibrate before heat is cut pinch roll surely; Fluid pressure type heat is cut surely and is predetermined to be this steel plate of cutting, then with the direct cutting sequence that mode is identical forward steel plate is cut.
When described crop and scale cutting, steel plate is located by entrance pinch roll, and when detecting steel plate head before fluid pressure type heat is cut pinch roll surely, steel plate speed is reduced to fluid pressure type heat and cuts surely and wear tape speed, be set to by configuration if heat is cut surely, then the steel plate deceleration does not come into force.
The major parameter that described fluid pressure type heat is cut surely comprises: shearing the steel plate maximum ga(u)ge is 40mm, shearing the steel plate Breadth Maximum is 3250m, the shear steel plate temperature is 450 ℃-900 ℃, maximum cutting force is 4500KN, minimum crop length is 200mm, maximum crop length is 500mm, and the minimum length of final motherboard is 6000mm, the maximum length of final motherboard: 41000mm.
Steel plate camber after rolling is excessive, then steel plate is stopped, and adopts manually to cut into the receptible short steel plate of end trimming shears.
Good effect of the present invention is: set up the hot segmentation of fluid pressure type behind the thermal straightening machine and cut, with the steel plate of the long steel plate shearing one-tenth before the last cold bed less than cold bed length; The steel plate shearing that rolling back camber is excessive becomes less than cold bed length and satisfies the short steel plate of the minimum side cut amount of end trimming shears, improved milling train production efficiency, reduce side cut amount raising product recovery rate; Set up the investment that a hydrothermality segmentation cuts and be about 5,000,000 yuan, lack approximately and invest 2,500 ten thousand yuan than building a flying shear.Be adapted to the production of the medium plate of steel mill widely.
[description of drawings]
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is a technological process of production block diagram of the present invention.
[specific embodiment]
Referring to Fig. 1, qualified continuous casting steel billet 1 is taken out from heating furnace by the dress steel machine of coming out of the stove after roller-way delivers in the walking beam furnace heating steel billet 2 soaking or is heated to suitable temperature, carry out the scale on surface cleaning through high-pressure water descaling machine de-scaling 3, delivering into the vertical miller edging through roller-way subtracts wide by 4, prick machine rolling 5 by four rollers then, banded steel plate is carried through roller-way and is cooled off 6 by force by cooling facility for laminar flow, delivers into thermal straightening machine 7 through roller-way again and carries out leveling.Before the cold bed inlet fluid pressure type heat being installed cuts surely, the main equipment that this fluid pressure type heat is cut surely comprises base plate, memorial archway, crossbeam, oil cylinder, cutter head, blade, its objective is by the cold bed Len req and finish the crop of long steel plate behind the milling train and cut and wait operation, cut 8 according to rolling back steel plate length by the hot segmentation of fluid pressure type and cut off the head of fish tail shape automatically and cut into less than the motherboard of cold bed length and serve cold bed 9 and cool off.
The main equipment that fluid pressure type heat is cut surely is made up of base plate, memorial archway, crossbeam, oil cylinder, cutter head, blade etc., and purpose is to finish the crop of long steel plate behind the milling train and operation such as cut by the cold bed Len req.
The important technological parameters that heat is cut surely is: steel plate maximum ga(u)ge: 40mm, and the steel plate Breadth Maximum: 3,250mm, steel billet temperature in the ordinary production: 450-900 ℃, the shear ability of API X70 steel grade (in the time of 450 ℃): 25mm, the shear ability of St 52 steel grades (at 550 ℃): 40mm, maximum cutting force: 4,500kN, minimum crop length: 200mm, maximum crop length: 500mm, the minimum length of final motherboard: 6,000mm, the maximum length of final motherboard: 41,000mm.
The main operating process that heat is cut surely is: heat is cut surely the mainboard behind the milling train is cut into the motherboard that several piece can go up cold bed; Shear the special-shaped head of steel plate and obtain straight steel plate head, and carry out a series of cutting to lengths mainboard is divided into the length of requirement so that go up the motherboard of cold bed.When handling steel plate with end trimming shears, all to steel plate crop (usually at 25mm or thinner steel plate) at every turn.Steel plate (for the thick above steel plate of 25mm) to not needing to handle with end trimming shears only just carries out crop under the condition that the operator requires.Cut is quiet to be cut this cutter in order to descend, and cutter moves by two Driven by Hydraulic Cylinder.Hydraulic cylinder is synchronous by angle lever.The equipment that heat is cut the district surely comprises steel plate is fed the hydraulic pressure entrance pinch roll of cutter, inlet measuring roller, swing roller-way and a cover steel scrap induction system.
Heat is cut the major control function surely: decide cutting head length, coldly decide cutting head length, the cold sample Cutting Length of cutting surely, cut useless calculating such as (desired value is less than 500mm) the factor cutting system (cutting number of times and length) that minimizes according to the maximum length of rolling the total plate length in back, production board (daughter board) quantity and length, motherboard, cold drawing length, heat.If total plate length is not suitable for production board (daughter board) length, must be according to second second cutting system of daughter board length computation of selecting.Second Cutting Length of selecting is selected between the 10m daughter board length (can regulate from HMI) from 6,8.For avoiding under steel billet temperature exceeds 550 ℃ condition, steel plate being parked on the straightener, and consider distance and maximum total about 73m of plate length between heat rectification machine outlet and the inlet cutter pinch roll, according to total plate length and 3 kinds of total plate cutting modes of temperature design: directly forward, forward, to opening.
Directly forward: first is cut to crop (if having selected crop), is the scale cutting then.
Forward: when detecting steel plate head at the heat rectification machine outlet side, heat is cut surely and is predetermined to be pass-through mode, steel plate aligning process is finished, heat rectification machine is opened, steel plate is cut the front at scale and is moved backward and begin and vibrate before the cutter pinch roll, heat is cut surely and is preset as cutting steel plate, then with " directly forward " cutting sequence that mode is the same steel plate is cut.
Backward: first is cut to scale cuts, with total plate cutting steel plate that is every not enough 41.5m.The steel plate that is positioned at the cutter downstream moves and begins vibration to the slow cooling runout table, and the steel plate that heat is cut the upstream surely cuts simultaneously.After steel plate that heat is cut the upstream surely was cut, corresponding motherboard had been sent to cold bed, and heat is cut surely and is set to pass-through mode, was parked in steel plate on the slow cooling roller-way simultaneously and was moved back into the cutter front and begins and vibrate before heat is cut pinch roll surely; Heat is cut surely and is predetermined to be this steel plate of cutting, then with " directly forward " cutting sequence that mode is identical steel plate is cut.
To will adopting " forward " cutting mode rather than " oppositely " mode at total plate of being longer than 41.5m of slow cooling district cooling.
When crop and scale cutting, steel plate is by entrance pinch roll location (speed master makes).When detect steel plate head before fluid pressure type heat is cut pinch roll surely, steel plate speed is reduced to fluid pressure type heat and cuts, wears tape speed surely, is set to by configuration if heat is cut surely, and then the steel plate deceleration does not come into force.
In steel plate advanced process, the downstream roller-way that swing roller-way and this steel plate relate to made by cutter speed master synchronously.Just carried out behind the cutting to length, the downstream roller-way that swing roller-way and steel plate relate to accelerates to rate of departure together.When outlet detects the steel plate afterbody in the oscillating roller road, swing roller-way and make synchronously with cutter speed master once more.Through the time-delay of 1s (regulating between limber up period), next steel plate begins to advance after the swing roller-way quickens.
All scales are cut, and the basis of the Velocity Reference of main transmission is: to being no more than the steel plate of 15mm, maximal rate is 2.5m/s, and to the steel plate of 15mm-25mm, maximal rate is 2m/s; To the steel plate of thickness above 25mm, maximal rate is 1.5m/s; Maximum acceleration/deceleration within them is 1.25m/s2.
Cutter is worn band, crop and back-end crop, and Velocity Reference always is set to 0.5m/s, and acceleration/deceleration is 1.25m/s2.
Calculate by the inlet measuring roller and to carry out the scale cutting and to cut useless steel plate length, by the steel plate length of speed setting value integral and calculating crop.
When non-selected heat was cut surely, heat was cut surely and is preset as pass-through mode: the complete lifting of the top roll of entrance pinch roll, and lower roll promotes, and cutter is in the starting position, and the swing roller-way is set to " steel plate transportation " position.When detecting steel plate head in the heat rectification machine exit, all above-mentioned setting values all activate.
If rolling back steel plate camber is excessive, then manual intervention is stopped steel plate and is cut into end trimming shears 10 receptible shorter steel plates.Steel plate is carried toward end trimming shears 10 by roller-way and is cut edge after cooling off, cut the finished product steel plate that scale 11 cuts into cut lengths by scale again, through print-marking machine length specification kind of steel plate etc. is identified 12, warehouse-in is stacked after collection 13 of sheet piler platform finished product collection device or turnover panel stand turnover panel inspection 14, or directly the sale that comes into the market is transported in entrucking.
The present invention has the advantage that production efficiency height, small investment, technology are simple, operation is practical and convenient.Be adapted to the production of the medium plate of steel mill widely.

Claims (8)

1, a kind of Heavy Plate Production technology, comprise that slab heating, de-scaling, mill milling, laminar flow cooling, thermal straightening machine leveling, end trimming shears are cut edge and scale is cut scale, it is characterized in that: before the cold bed inlet, fluid pressure type heat is installed and cuts surely, when steel plate after the thermal straightening machine leveling, according to rolling back steel plate length, surely cut the head that cuts off the fish tail shape automatically and cut into less than the motherboard of cold bed length and serve cold bed and cool off by fluid pressure type heat, carry toward end trimming shears by roller-way through cooled steel plate and cut edge.
2, a kind of Heavy Plate Production technology according to claim 1 is characterized in that: the cut mode that described fluid pressure type heat is cut surely is to be provided with three kinds of total plate cutting modes according to the overall length of steel plate and temperature, is respectively: directly forward, forward, backward.
3, a kind of Heavy Plate Production technology according to claim 1 and 2 is characterized in that: describedly directly be forward: first is cut to crop, is the scale cutting then.
4, a kind of Heavy Plate Production technology according to claim 1 and 2, it is characterized in that: describedly be forward: when detecting steel plate head at the thermal straightening machine outlet side, fluid pressure type heat is cut surely and is predetermined to be pass-through mode, after steel plate aligning process is finished, thermal straightening machine is opened, steel plate is cut the front at scale and is moved backward and begin and vibrate before the cutter pinch roll, and fluid pressure type heat is cut surely and is preset as cutting steel plate, then with cutting sequence that directly mode is the same forward steel plate is cut.
5, a kind of Heavy Plate Production technology according to claim 1 and 2, it is characterized in that: describedly be backward: first is cut to scale cuts, with the total plate cutting of steel plate is every block of steel plate less than 41.5m, the steel plate that is positioned at the cutter downstream moves and begins vibration to the slow cooling runout table, and the steel plate that fluid pressure type heat is cut the upstream surely cuts simultaneously; After steel plate that fluid pressure type heat is cut the upstream surely was cut, corresponding motherboard had been sent to cold bed, and fluid pressure type heat is cut surely and is set to pass-through mode, was parked in steel plate on the slow cooling roller-way simultaneously and was moved back into the cutter front and begins and vibrate before heat is cut pinch roll surely; Fluid pressure type heat is cut surely and is predetermined to be this steel plate of cutting, then with the direct cutting sequence that mode is identical forward steel plate is cut.
6, a kind of Heavy Plate Production technology according to claim 1 and 2, it is characterized in that: when described crop and scale cutting, steel plate is located by entrance pinch roll, when before fluid pressure type heat is cut pinch roll surely, detecting steel plate head, steel plate speed is reduced to fluid pressure type heat and cuts surely and wear tape speed, be set to by configuration if heat is cut surely, then the steel plate deceleration does not come into force.
7, a kind of Heavy Plate Production technology according to claim 1 and 2, it is characterized in that: the major parameter that described fluid pressure type heat is cut surely comprises: shearing the steel plate maximum ga(u)ge is 40mm, shearing the steel plate Breadth Maximum is 3250m, the shear steel plate temperature is 450 ℃-900 ℃, maximum cutting force is 4500KN, and minimum crop length is 200mm, and maximum crop length is 500mm, the minimum length of final motherboard is 6000mm, the maximum length of final motherboard: 41000mm.
8, a kind of Heavy Plate Production technology according to claim 1 and 2, it is characterized in that: the steel plate camber after rolling is excessive, then steel plate is stopped, and adopts manually to cut into the receptible short steel plate of end trimming shears.
CNB2005100325216A 2005-12-09 2005-12-09 Medium-thick plate production process CN100374218C (en)

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Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100382903C (en) * 2006-05-30 2008-04-23 江阴博丰钢铁有限公司 Hot rolling process of wide flat bar steel
CN101209456B (en) * 2006-12-27 2010-11-03 鞍钢股份有限公司 High-strength medium plate production process
CN101491812B (en) * 2009-03-06 2011-09-07 武汉钢铁(集团)公司 Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress
CN101791681B (en) * 2010-02-02 2012-03-28 南京钢铁股份有限公司 Water-cooling die casting production process of plate blank used for medium plate
CN102398006A (en) * 2010-09-15 2012-04-04 鞍钢股份有限公司 Device and method for detecting speed of continuous casting blank
CN103883867A (en) * 2014-03-06 2014-06-25 胡杰 Inverted-n steel and production method thereof
CN105234199A (en) * 2015-11-04 2016-01-13 北京科技大学 Test device and method suitable for rolling medium/small-sized steel plates
CN103883867B (en) * 2014-03-06 2016-11-30 胡杰 A kind of a few word steel and production method thereof
CN109116806A (en) * 2017-06-23 2019-01-01 宝山钢铁股份有限公司 Best segmentation automatic shearing control system is cut in a kind of cutting head of slab
CN109491325A (en) * 2017-09-12 2019-03-19 宝山钢铁股份有限公司 A kind of best nibbling shear control system of camber slab
CN109604719A (en) * 2018-12-04 2019-04-12 包头钢铁(集团)有限责任公司 A kind of camber steel plate cutting method

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JPH0775802B2 (en) * 1985-09-20 1995-08-16 川崎製鉄株式会社 Plate edge processing equipment for thick plates
IT1248171B (en) * 1991-05-27 1995-01-05 Danieli Off Mecc Process for obtaining cold profiles and / or bars and profiles / or bars thus obtained
DE4445716C2 (en) * 1994-12-22 1997-10-02 Sundwiger Eisen Maschinen Process and production line for producing cold-rolled, stainless steel strip
DE19540978A1 (en) * 1995-11-03 1997-05-07 Schloemann Siemag Ag Production plant for the continuous or discontinuous rolling out of hot strip
CN1640568A (en) * 2004-01-12 2005-07-20 鞍钢集团新钢铁有限责任公司 Marginal concurrent heating direct-rolling process for heavy-medium plate billet continuous casting-rolling mill set

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100382903C (en) * 2006-05-30 2008-04-23 江阴博丰钢铁有限公司 Hot rolling process of wide flat bar steel
CN101209456B (en) * 2006-12-27 2010-11-03 鞍钢股份有限公司 High-strength medium plate production process
CN101491812B (en) * 2009-03-06 2011-09-07 武汉钢铁(集团)公司 Hot continuous rolling medium-and-heavy plate production method and device without coiling micro-stress
CN101791681B (en) * 2010-02-02 2012-03-28 南京钢铁股份有限公司 Water-cooling die casting production process of plate blank used for medium plate
CN102398006A (en) * 2010-09-15 2012-04-04 鞍钢股份有限公司 Device and method for detecting speed of continuous casting blank
CN103883867A (en) * 2014-03-06 2014-06-25 胡杰 Inverted-n steel and production method thereof
CN103883867B (en) * 2014-03-06 2016-11-30 胡杰 A kind of a few word steel and production method thereof
CN105234199A (en) * 2015-11-04 2016-01-13 北京科技大学 Test device and method suitable for rolling medium/small-sized steel plates
CN109116806A (en) * 2017-06-23 2019-01-01 宝山钢铁股份有限公司 Best segmentation automatic shearing control system is cut in a kind of cutting head of slab
CN109116806B (en) * 2017-06-23 2021-02-19 宝山钢铁股份有限公司 Optimal segmentation automatic shearing control system for thick plate crop shear
CN109491325A (en) * 2017-09-12 2019-03-19 宝山钢铁股份有限公司 A kind of best nibbling shear control system of camber slab
CN109604719A (en) * 2018-12-04 2019-04-12 包头钢铁(集团)有限责任公司 A kind of camber steel plate cutting method

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