CN101722187A - Process for producing spool large-coil threaded steel - Google Patents
Process for producing spool large-coil threaded steel Download PDFInfo
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- CN101722187A CN101722187A CN200910228111A CN200910228111A CN101722187A CN 101722187 A CN101722187 A CN 101722187A CN 200910228111 A CN200910228111 A CN 200910228111A CN 200910228111 A CN200910228111 A CN 200910228111A CN 101722187 A CN101722187 A CN 101722187A
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Abstract
The invention relates to a process for producing a large-coil bar in the field of metal calendaring processing. A threaded steel bar is usually delivered commonly in a straight way and has higher cost in construction. Recently, a downstream procedure has the requirement on delivery by a spool large-coil state, the middle process can be saved, and the steel consumption is reduced. Accordingly, the invention provides a process for producing the spool large-coil threaded steel. In the method, after being heated, a steel blank enters a 18th short stress line tandem rolling unit; a bar QTB water penetration cooling device and a light water penetrating device are arranged behind a18th fine rolling machine; after the water penetration cooling is carried out, a large-coil online water treatment device, a head and tail shearing device and a spool coiling device are arranged, and the torsion-free uniform and dense coiling of the threaded steel on a bobbin device is carried out; and after being coiled, a coil is drawn and conveyed to the packaging procedure. As a result, an unassailable tight bar coil is obtained, and the downstream cold processing line can be directly and safely supplied with the bar under the condition of a hot rolling/rolling state wire coil at high speed; and compared with the traditional off-line cold uncoiling, straightening and re-coiling, the production cost is obviously reduced, and the steel per ton can save 160-180 RMB.
Description
Technical field
The present invention relates to the manufacturing technique method of coiling bar greatly in the non-cutting metal calendering manufacture field, relate in particular to steel billet is rolled into spool large-coil threaded steel by bar mill manufacturing technique method.
Technical background
The screw-thread steel bar is a kind of construction material that present building trade is generally used, and generally adopts the vertical bar mode to deliver goods during conventional the use, and this form cost in construction is higher relatively, is not easy to save steel.Along with it has wide range of applications, lower procedure requires to take the delivery of spool large volume state, and the delivery of this spool large volume state can be saved the middle process step, such as the cold uncoiling of traditional off-line, links such as stretching and rewinding reduce in the steel transition process consuming, and save building cost.
Screw-thread steel bar spool large-coil rod material production technology, yet there are no report, " production method that a kind of spool large-coil threaded steel is coiled greatly " patent is disclosed as CN200910076072.3, this patent is screw-thread steel bar rolled piece after finish rolling to be entered the 3rd section water-cooled temperature is reduced to 840 ± 10 ℃ curls, entering stay-warm case after the rolling, coils nature and is as cold as room temperature after 4200～4800 seconds with the cooling of 0.08～0.30 ℃/s cooling rate.Should curl for curling naturally.
For this reason, the present invention proposes a kind of process for producing spool large-coil threaded steel, this technical method had both embodied the novelty of technical process, reached the technology requirement of lower procedure again, the comprehensive mechanical property that guarantees the screw-thread steel product does not again lose, and fully satisfies user's instructions for use.
Process for producing spool large-coil threaded steel of the present invention is mainly realized by following technology.
Process for producing spool large-coil threaded steel of the present invention, steel billet be through after the heating furnace heating, enter in 6 roughing, 8 roll, 4 18 short-stress path tandem rolling units that finish rolling is formed.Start rolling temperature is between 980 ℃-1150 ℃, being provided with bar quenching and self tempering (QTB) after the 18th mm finishing mill unit wears water-cooling apparatus and gently wears water-cooling apparatus, after process is worn water cooling or is gently worn water-cooling process, deep bid is set twists in the line water treatment facilities, rolled piece shear end to end is set, intelligent pinch roll is equipped with in setting, the I-beam wheel devices for taking-up of kink device and bar feeding system, carrying out screw-thread steel does not have on roll device and turns round even solid matter and batch, coiling temperature is controlled at 550 ℃-750 ℃, batch the back and adopt manipulator will coil extraction, and be placed on to coil and be transported to packaging process on the conveying device.
Described spool large-coil threaded steel muscle manufacturing technique method, start rolling temperature is controlled between 1050-1150 ℃ for the start rolling temperature of 12-20mm reinforcing bar, is controlled between 980-1080 ℃ for the start rolling temperature of 22-40mm reinforcing bar.
Described spool large-coil threaded steel muscle manufacturing technique method, temperature was controlled between 550 ℃-700 ℃ after bar quenching and self tempering (QTB) were worn water; Or temperature is controlled between 850-950 ℃ after gently wearing water; Wherein quench and self tempering (QTB) is worn water-cooling apparatus and is made up of surface hardening, self tempering and cooling three phases.Wear water cooling or soft wear cooling process after, the cooling water tank of four online serial connections is set, bar is carried out online cooling.
Described spool large-coil threaded steel muscle manufacturing technique method, deep bid twists in the line water treatment facilities, intelligence pinch roll, kink device and bar feeding system are made up of a revolving cylinder and a bar head clamping/guider that is used to begin to batch that is used to coil shaping, are formed under the tension force and batch.
Described spool large-coil threaded steel muscle manufacturing technique method, coiling temperature, temperature for the 12-14mm reinforcing bar is controlled at 650 ℃-750 ℃, is controlled at 600 ℃-750 ℃ for the temperature of 16-20mm reinforcing bar, is controlled at 550 ℃-700 ℃ for the temperature of 22-40mm reinforcing bar.
Described spool large-coil threaded steel muscle manufacturing technique method, the coiling speed of I-beam wheel coiling technique method are with mill speed, and its speed is 15m-35m/s, and I-beam wheel is batched the bar diameter scope and comprised 12-40mm, and monovolume weight reaches the 2.5-3.5 ton; Adopt two I-beam wheel devices for taking-up alternate runs, carrying out reinforcing bar when batching when one of them, another is then unloading volume.
Also be process for producing spool large-coil threaded steel of the present invention, behind the start rolling temperature between determining 980 ℃-1150 ℃, enter 18 short-stress path tandem rolling units.After the 18th mm finishing mill unit, be provided with the bar quenching and wear water-cooling apparatus and gently wear the water device, temperature after wearing water can be controlled between 550 ℃-700 ℃ according to different size; If the employing alloying technology, can adopt gently wear the water device will roll the back temperature be controlled between 850-950 ℃.Again through after wearing cooling process, to coiling production line greatly.Coiling production line greatly has four online cooling water tanks, can continue rolled piece is carried out online cooling processing, and whole so when take-up temperature all suits, and guarantees that bar has stable mechanical performance and institutional framework.Bar is cut to pinch roll and a revolution then through last water tank, and revolution is cut and can be rotated continuously.Revolution is cut the back I-beam wheel devices for taking-up that intelligent pinch roll, kink device and bar feeding system are housed is set, carrying out screw-thread steel does not have on roll device and turns round even solid matter and batch, coiling temperature can be controlled in 550 ℃-750 ℃, batch the back and adopt manipulator will coil extraction, and be placed on to coil and be transported to packaging process on the conveying device.
Take the process of spool large-coil of the present invention to have following advantage:
1, with traditional batching different is, be not turn round even pressure layer on roll device in the lapper technology of innovation by hot rolled rod is had in order, the result obtains hardheaded closely knit bar volume, and it has unique, no waste product uncoiling ability, directly safety/at high speed provides bar with " hot rolling/as-rolled condition coil of wire " condition for downstream cold working line, thereby avoided any other middle process step, such as the cold uncoiling of traditional off-line, stretching and rewinding, production cost obviously reduces, and steel per ton can be saved 160-180 unit in transition process.
2, I-beam wheel is batched the fastest 35m/s of reaching of the speed of service of production line, because lapper production line speed of service height makes that the finishing mill speed in the milling train is also very high, thereby improved productivity ratio.Coiling temperature generally is controlled at 550-750 ℃, but for shrend screw-thread steel bar, can take low temperature to batch, and to other products, coiling speed can be according to answering material processed to select specially.
3, I-beam wheel is batched shrend or the micro alloyed steel screw-thread steel bar that product scope comprises the 12-40mm diameter.Monovolume weight reaches the 2.5-3.5 ton, and the activity coefficient between lapper and the legacy system is compared the higher 0.6-0.9 of reaching, and other crimping machines are the highest can only to reach 0.2-0.4, and ultra dense solidity can produce stocking recovery rate preferably.
4, batched the screw-thread steel bar of production by I-beam wheel, combination property is compared with vertical bar screw-thread steel bar, and except that tensile strength slightly reduced, other performance indications were suitable substantially, can satisfy user's instructions for use fully.
Description of drawings
Accompanying drawing 1 is a process method flow chart of the present invention.After steel billet heats through heating furnace in the drawings, enter 18 short-stress path tandem rolling units, after the 18th mm finishing mill unit, be provided with the bar quenching and wear water-cooling apparatus and gently wear water-cooling apparatus.Be provided with four online cooling water tanks, rolled piece shear end to end coiling production line greatly then, the I-beam wheel devices for taking-up of intelligent pinch roll, kink device and bar feeding system is equipped with in setting, batch the back and adopt manipulator will coil extraction, and be placed on to coil and be transported to packaging process on the conveying device.
The specific embodiment
Spool large-coil threaded steel production technology of the present invention is to adopt steel billet rolling by bar mill, and coils into the technological process of production of spool large-coil.
Be that steel billet adds thermal recovery step rate recuperative heater, guarantee heat time heating time to guarantee heating quality, control the blank tapping temperature simultaneously at 980-1150 ℃ more than 70 minutes.Milling train adopts 18 rolling mills completely, and 6 of roughing units, 8 of middle milling train groups, finishing mill are 4.Milling train is a short stress path rolling mill completely, and vertical miller is transmission.The 16th, 18 rolling mills are flat upright convertible milling train.The rigidity of milling train is big, can realize temperature control, zerolling.Flat completely, grade separation replaces and arranges, realizes no twist rolling, can significantly reduce the corner crack and the blemish that cause because of reversing, improves lumber recovery and milling train utilization rate.Simultaneously, help realizing the power that parts a little the control of thick middle milling train (1-10 rolling mill), improve the precision of product.Being provided with after the 18th mm finishing mill unit quenches wears water-cooling apparatus and gently wears water-cooling apparatus, and the control finishing temperature realizes low temperature and temperature-controlled rolling, finally obtains the tiny screw-thread steel high-quality performance of even tissue crystal grain.Provide with rolling up " hot rolling/as-rolled condition " under for downstream cold working line user in order to guarantee direct safety/at high speed around the volume bar, be provided with online cooling processing water tank coiling production line greatly, be provided with the I-beam wheel devices for taking-up behind the process for cooling, it can with nothing turn round method with screw-thread steel around being rolled into high-quality solid matter, heavy duty volume, it is unique to have, no waste product uncoiling ability, avoided any other intermediate link in user's use, such as the cold uncoiling of traditional off-line, tensioning and rewinding etc., consume thereby reduced in the steel transition process, saved building cost.
Quenching Heat Treatment technology mainly is divided into surface hardening, self tempering and finally cools off three phases.The dominant ideas of technological design are to give full play to the controlled rolling and controlled cooling ability of equipment itself, be adjusted into auxilliary with chemical composition, the accurately control of design and reinforcement key process parameter, guarantee that heart portion, middle part and surface portion on the reinforcing bar cross section obtain difference and suitable phase-change organization, and then when satisfying reinforcement yielding intensity, strong flexor ratio, also can satisfy requirement to plasticity and toughness.
Bar I-beam wheel coiling technique, it can not have the method for turning round with round steel, band steel and square steel around being rolled into high-quality/hypercompact, heavy duty volume, because it has no waste product uncoiling ability, can " hot rolling/as-rolled condition " directly supply with downstream cold working line around the bar volume of volume, it is remarkable to change cost savings.
With traditional batching different be, be not turn round even pressure layer on roll device in the lapper technology of innovation by hot rolled rod is had in order, the result obtains hardheaded closely knit bar volume, and it has unique, no waste product uncoiling ability, directly safety/at high speed provides bar with " hot rolling/as-rolled condition coil of wire " condition for downstream cold working line.
Therefore, traditional off-line uncoiling, stretching and rewinding method has just no longer needed, and production cost is obviously saved.The speed of service of I-beam wheel coiling machine production line can reach 35m/s, for QTS shrend screw-thread steel bar, can take low temperature to batch, and to other products, coiling speed can be according to answering material processed to select specially.
Spool large-coil devices for taking-up basic composition and process comprise, are arranged in finishing mill and I-beam wheel and batch between the district, by being used to realize that one group of water-cooled case and conveying equipment to being carried out online adjustment and control by the bar that I-beam wheel is batched form; Be arranged in I-beam wheel taking-up equipment entrance side, be used for the crop shears that rolled piece is sheared end to end, realize bar temp control and bar conveying.Adopt " intelligence " pinch roll and a kink, the bar that not only can be implemented in " under the tension force effect " batches, and on the I-beam wheel coiler drum one of every formation new batch layer time, can require " raising " one deck in accordance with regulations, realize even solid matter.For make through rolling bar on the I-beam wheel coiler drum neatly, hierarchal arrangement equably, form coiling of good looking appearance, be useful on the revolving cylinder of coiling shaping and be used to the bar feeding system of the bar head clampings/guider composition that begins to batch.Two I-beam wheel devices for taking-ups and alternate run are arranged, carrying out bar when batching when one of them, another is then unloading volume, and is perhaps opposite.Coiler drum has a plurality of expansion fan pieces, so that will coil taking-up.A manipulator tool hand is arranged, be used for and coil extraction, and be placed on and be positioned at the coiling on the conveying device of outlet side.At the spool large-coil Runout area, can coil automatic bundling (each is coiled and makes a call to 4 road ties), weigh in this realization, and will coil and be transported to final collection station.Whole I-beam wheel coiling process is all by an intelligence control system control.This system can monitor following two processes and control especially: the one, and the bar temp before batching is automatically adjusted and controls; The 2nd, can with bar on the I-beam wheel coiler drum neatly, hierarchal arrangement equably, and on cylinder, during the new layer of one of every formation, can require " raising " one deck in accordance with regulations, up to whole coil to batch finish, realize even solid matter.
The coiling technique process control comprises that the control of I-beam wheel is controlled, coiled greatly to online water treatment, scissors, vertical loop control, pinch roll, one-tenth bed device before coiling greatly, afterbody is controlled and the rolling carrying.
Coiling production line greatly has four online cooling water tanks, can carry out online cooling processing to rolled piece, guarantees suitable stable temperature so when take-up, thereby guarantees that bar has stable mechanical performance and institutional framework.Scissors before coiling are greatly implemented cutting head cutting tail.When detecting head by cold/hot metal detector, begin to shear in the upstream, shear rate with mill speed as the basis of measuring length.The operator can set the head crop marks and need shear needed end to end length by active station, detects the afterbody of the bar of not shearing by the cold/hot metal detector of upstream, according to mill speed as the tail length based measurement.Vertical loop control.There is a vertical loop to be installed in the front that each is coiled greatly.After beginning to start winding system, kink rises and is controlled, so that rolling material obtains a buffering, and then compensates and instantaneously changes layer " shake " effect takes place because of bar twines.Rolling employing pinch roll applies tension force on finishing mill, keeps a tension limit scope in whole coiling process.
Pinch roll.Each coil greatly I-beam wheel with the effect of pinch roll be adopt a constant tension force to be wrapped in bar on the I-beam wheel and reduce finishing stand and I-beam wheel between vibrations.Pinch roll is controlled so that the whole length of pinch roll stays open state.Pinch roll opens and closes and carries out controlled by automated system according to tracking situation end to end.The pinch roll motor is connected to by electric drive axle on the motor of coiling greatly avoiding not having tension force control between two devices, even layer produces " shake " effect because of changing in the winding operation process.
Become bed device control.The purpose of stratification equipment is for bar being distributed and being wrapped on the I-beam wheel.Speed, the size of bar and the width of I-beam wheel that will consider reality calculated in the space that moves horizontally of stratification equipment bar.
Coil the control of I-beam wheel greatly.I-beam wheel is controlled so that keep constant threading speed in whole coiling process.Carry out one and send rule forward to, exist speed to fall when avoiding stinging steel.Based on the information of head tracing system, before bar arrives, provide instantaneous overrunning, and beginning back the cancelling that wind the line at once to motor.When coiling, successively calculate the reference velocity of motor, be the identical threading speed of dimensions maintenance of the number of plies and bar according to coiling, in order to limit " shake " phenomenon, change an acceleration of sending to forward of the preceding execution of layer and smoothly change speed.
Afterbody control.When the afterbody of bar is handled,, after finishing, whole coiling after afterbody leaves the fastest finishing module, slows down for fear of " oppositely hitting suddenly " phenomenon at once.Looper height also society is decided to be zero, and when finishing coiling, former operating rate is set and new bar winding work is carried out in storage.
The volume carrying.According to the requirement of scope of supply, the haulage equipment that is formed after rolling up by I-beam wheel comprises the volume executor, binding apparatus, and roller-way, cantilever and chain-linked conveyer are formed.Haulage equipment will be rolled up with chain-linked conveyer according to normal order and transport the zone that this dozen coiled greatly, and operator visitor sets by active station and controls this zone.
Claims (8)
1. spool large-coil threaded steel muscle manufacturing technique method, after steel billet heats through heating furnace, enter 6 roughing, roll in 8,4 18 short-stress path tandem rolling units that finish rolling is formed, it is characterized in that start rolling temperature is between 980 ℃-1150 ℃, being provided with bar quenching and self tempering (QTB) after the 18th mm finishing mill unit wears water-cooling apparatus and gently wears water-cooling apparatus, after process is worn water cooling or is gently worn water-cooling process, deep bid is set twists in the line water treatment facilities, rolled piece shear end to end is set, intelligent pinch roll is equipped with in setting, the I-beam wheel devices for taking-up of kink device and bar feeding system, carrying out screw-thread steel does not have on roll device and turns round even solid matter and batch, coiling temperature is controlled at 550 ℃-750 ℃, batch the back and adopt manipulator will coil extraction, and be placed on to coil and be transported to packaging process on the conveying device.
2. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, it is characterized in that start rolling temperature, start rolling temperature for the 12-20mm reinforcing bar is controlled between 1050-1150 ℃, is controlled between 980-1080 ℃ for the start rolling temperature of 22-40mm reinforcing bar.
3. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, it is characterized in that bar quenches and self tempering (QTB) wear water after temperature be controlled between 550 ℃-700 ℃; Or temperature is controlled between 850-950 ℃ after gently wearing water; Wherein quench and self tempering (QTB) is worn water-cooling apparatus and is made up of surface hardening, self tempering and cooling three phases.
4. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, it is characterized in that wear water cooling or soft wear cooling process after, the cooling water tank of four online serial connections is set, bar is carried out online cooling.
5. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, it is characterized in that deep bid twists in the line water treatment facilities, intelligence pinch roll, kink device and bar feeding system are made up of a revolving cylinder and a bar head clamping/guider that is used to begin to batch that is used to coil shaping, are formed under the tension force and batch.
6. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, it is characterized in that coiling temperature, temperature for the 12-14mm reinforcing bar is controlled at 650 ℃-750 ℃, temperature for the 16-20mm reinforcing bar is controlled at 600 ℃-750 ℃, is controlled at 550 ℃-700 ℃ for the temperature of 22-40mm reinforcing bar.
7. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1, the coiling speed that it is characterized in that I-beam wheel coiling technique method is with mill speed, its speed is 15m-35m/s, and I-beam wheel is batched the bar diameter scope and comprised 12-40mm, and monovolume weight reaches the 2.5-3.5 ton.
8. spool large-coil threaded steel muscle manufacturing technique method as claimed in claim 1 is characterized in that adopting two I-beam wheel devices for taking-up alternate runs, is carrying out reinforcing bar when batching when one of them, and another is then unloading volume.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910228111A CN101722187A (en) | 2009-11-10 | 2009-11-10 | Process for producing spool large-coil threaded steel |
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| CN200910228111A CN101722187A (en) | 2009-11-10 | 2009-11-10 | Process for producing spool large-coil threaded steel |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500618A (en) * | 2011-10-28 | 2012-06-20 | 内蒙古包钢钢联股份有限公司 | Production method for large disc coil of sucker rod |
| CN102912097A (en) * | 2012-10-09 | 2013-02-06 | 范华平 | Ring type water through cooling device used for steel rolling quenching |
| CN103498036A (en) * | 2013-09-25 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | Production technology of hot-rolled high-strength fine-diameter steel bar by adopting drawing wire |
| CN108213292A (en) * | 2018-03-23 | 2018-06-29 | 海盐星辰工具有限公司 | A kind of transverse rolling device for spanner processing |
| CN112934955A (en) * | 2021-01-29 | 2021-06-11 | 中天钢铁集团有限公司 | Spring steel wire rod production method for reducing false alarm rate of eddy current flaw detection |
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2009
- 2009-11-10 CN CN200910228111A patent/CN101722187A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102500618A (en) * | 2011-10-28 | 2012-06-20 | 内蒙古包钢钢联股份有限公司 | Production method for large disc coil of sucker rod |
| CN102912097A (en) * | 2012-10-09 | 2013-02-06 | 范华平 | Ring type water through cooling device used for steel rolling quenching |
| CN102912097B (en) * | 2012-10-09 | 2013-12-11 | 范华平 | Ring type water through cooling device used for steel rolling quenching |
| CN103498036A (en) * | 2013-09-25 | 2014-01-08 | 江苏天舜金属材料集团有限公司 | Production technology of hot-rolled high-strength fine-diameter steel bar by adopting drawing wire |
| CN108213292A (en) * | 2018-03-23 | 2018-06-29 | 海盐星辰工具有限公司 | A kind of transverse rolling device for spanner processing |
| CN108213292B (en) * | 2018-03-23 | 2023-07-25 | 海盐星辰工具有限公司 | Transverse rolling device for wrench machining |
| CN112934955A (en) * | 2021-01-29 | 2021-06-11 | 中天钢铁集团有限公司 | Spring steel wire rod production method for reducing false alarm rate of eddy current flaw detection |
| CN112934955B (en) * | 2021-01-29 | 2022-03-01 | 中天钢铁集团有限公司 | Spring steel wire rod production method for reducing false alarm rate of eddy current flaw detection |
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Application publication date: 20100609 |