CN102896147B - A kind of rolling device of production line of bar Large space anapsid and milling method - Google Patents
A kind of rolling device of production line of bar Large space anapsid and milling method Download PDFInfo
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- CN102896147B CN102896147B CN201210412130.7A CN201210412130A CN102896147B CN 102896147 B CN102896147 B CN 102896147B CN 201210412130 A CN201210412130 A CN 201210412130A CN 102896147 B CN102896147 B CN 102896147B
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Abstract
The invention discloses a kind of rolling device and milling method of production line of bar Large space anapsid, device comprises: be arranged on the box body on base, one end of box body is provided with horizontal roller support, the other end of box body is provided with guide and guard point, box body is provided with vertical deflector roll, horizontal roller support is provided with horizontal guide roller, and horizontal roller support is connected with horn mouth.Method comprises: the first step heats, and the spacing of second step rolling intermediate mill and mm finishing mill unit has 38-45m; 3rd step cooling; 4th step finishing.It is a kind of high-tech production technology that this rolling line can realize production smoothly, breaches the bottleneck of grooveless rolling, for industrialization large-scale production identifies basic theory, improves the theory of China's intermetallic composite coating distortion.Rolling yield of the present invention is high, and production cost is low.Roll is reusable, reduces roll consumption; Improve production operational availability, improve production output; Reduce motor power consumption; Improve market competitiveness of enterprises.
Description
Technical field
The invention belongs to field of metallurgy, specifically a kind of rolling device and milling method being applicable to steel plant bar production line Large space anapsid.
Background technology
Grooveless rolling is a kind of brand-new rolling technique, refers to the rolled piece that rolling depth-width ratio is larger on the roll of slotless, and when namely rolling method being routinely to have the roll of groove to change flat rolling into, the rolling that rolled piece does not contact with the sidewall of pass.It is not only applied to the thick intermediate mill of high line and bar, and is applied to the pre-finishing mill group of rolling bar mm finishing mill unit, high line, is applied to billet mill.Grooveless rolling technology, in minimizing rolling expense, improves the aspect such as rolling mill efficiency and reduction energy ezpenditure and all has suitable effect.
Several years ago, steel plant bar production line employing grooveless rolling frame spacing is maximum only has 10m, 2.8m is had between frame, therefore, expert draws a conclusion: grooveless rolling cannot steel rolling in the frame spacing more than more than 10m, and production can only realize within roughing mills, limit the new technology development in Hi-Tech of grooveless rolling, meanwhile, the output of production line of bar is not high, can not reach gratifying stage; Cause production cost to remain high, enterprise obviously lacks the market competitiveness.
Summary of the invention
Technical problem to be solved by this invention is: there is shortcoming for above prior art, a kind of rolling device and the milling method that are applicable to steel plant bar production line grooveless rolling intermediate mill and mm finishing mill unit Large space are proposed, the present invention can improve the operating rate of rolling line, improve product yield, reduce production cost.
The technical scheme that the present invention solves above technical problem is:
A kind of rolling device of production line of bar Large space anapsid, comprise base, and the box body be arranged on base, one end of described box body is provided with horizontal roller support, the other end of box body is provided with guide and guard point, described box body is provided with vertical deflector roll, and described horizontal roller support is provided with horizontal guide roller, and horizontal roller support is connected with horn mouth.
Further, in described device:
The described vertical deflector roll be arranged on box body has four, vertical deflector roll and two vertical deflector roll afterwards before being respectively two, and vertical deflector roll and two are provided with homophony screw rod between vertical deflector roll afterwards before two.
The described horizontal guide roller be arranged on horizontal roller support has two, and along the upper and lower parallel distribution of horizontal roller support.
Described horn mouth is fixed on horizontal roller support by locking nut.
Correspondingly, the present invention gives a kind of milling method of production line of bar Large space anapsid, comprises the steps:
The first step heats
Steel billet is heated on heating furnace inner edge stepping limit, when steel billet steps to heating furnace furnace delivery table, then delivers on the outer furnace delivery table of stove by furnace delivery table in stove;
Second step rolling
1) steel billet after coming out of the stove is transported to roughing mills by furnace delivery table and enters first milling train and be rolled;
2) steel billet is at roughing mills, adopts the rolling of grooveless rolling device, rolls into roughing side's section; Flying shear cuts head and the afterbody of this side's section rolled piece, then enters intermediate mill rolling, the side's of rolling section in rolling into; After crop, rolled piece continues to enter mm finishing mill unit rolling, obtains the screw-thread steel of finished product section; Wherein, the spacing of intermediate mill and mm finishing mill unit has 38-45m;
3rd step cooling
1) what mm finishing mill unit shut out needs the rolled piece carrying out Water cooling, enters the Water cooling device after being arranged on mm finishing mill unit and cools, and Ribbed Bar can be made to improve strength grade; Do not need the rolled piece carrying out Water cooling to be delivered directly to multi-length shear by roller-way, carry out nibbling shear; Rolled piece after water-cooled continues to be sent to multiple length sectional flying shear machine place, clamps feeding sectional flying shear by pinch roll before multiple length sectional flying shear machine, cuts into the merchantable timber multiple lengths adapting to cold bed length;
2) the multiple length rolled piece after segmentation is delivered in the teeth groove of walking beam cooler by cold-bed run-in table and hydraulically powered braking poking device, and rolled piece is pulled in process at poking device, relies on the sliding friction between rolled piece and brake block to brake and stops; Rolled piece, after straightening plate section tides over hot stage, the rack segments being sent to cold bed cools.Rolled piece advances in the stepping of cooling limit, cold bed top, is alignd in rolled piece one end by alignment roller table at tooth bar latter end, and then by carry-over bar, rolled piece is delivered on the step chain strip device of cold bed end, step chain with different step pitch stepwise operations, forms not stacking solid matter steel layer according to different trimmed sizes; When the rolled piece radical that step chain is collected reaches cold shears shearing radical, the steel discharging trolley be arranged on below step chain rises, and holds up the steel layer on chain, is moved on cold bed runout table;
4th step finishing
The multiple length rolled piece in a row sent here by cold bed runout table is cut into merchantable timber length, deliver on the roller-way before transfer bank by roller-way, by moving steel dolly, multiple length rolled piece is across inspection stand from rollgang transfer, on inspection with Auto-counting after, fall into piling table, bundling, finished product is weighed, and stockyard is deposited.
Further, in the inventive method:
Described steel billet is 1000-1050 DEG C on heating furnace inner edge stepping limit by heating-up temperature.
Described roughing mills milling train model Φ 550 × 6, roughing mills 6# frame side's section is 65mm.
Described intermediate mill milling train model Φ 450 × 6, intermediate mill 12# frame side's section is 30mm.
Described mm finishing mill unit milling train model Φ 350 × 6, finish rolling finished product section Φ 12-Φ 40mm.
Rolled piece adopts mild tension condition rolling between each frame of described roughing mills, between thick intermediate mill and between the first five frame of intermediate mill; Between intermediate mill 11 and 12 frame, be provided with kink between middle mm finishing mill unit and between each frame of mm finishing mill unit, rolled piece can realize the rolling of no-station pole canopy tower-loop control; Full rolling line milling train adopts horizontally and vertically alternative to arrange, realizes without reversing rolling.
Described 3rd step 2) in the rolled piece temperature of tiding over hot stage in straightening plate section be 800-900 DEG C, then on the rack segments delivering to cold bed, rolled piece temperature is 750-800 DEG C.
The present invention in intermetallic composite coating distortion in order to grooveless rolling carries out smoothly, a kind of novel grooveless rolling guide and guards of specialized designs, its device is that front and back split is arranged, changed and change groove guide and guards very easily, its rational inner cavity size and antifriction alloy are bumped into slide plate, can prevent from rolled piece from altering moving, reverse and off-square etc., the wear-resisting practicality of guide and guard is firm.
The present invention is set as the Large space of 38-45m in the centre-to-centre spacing of intermediate mill and mm finishing mill unit, adopt the steel billet of grooveless rolling new technology rolling after intermediate mill rolling, due in roll 12# frame side section be 30mm, between intermediate mill and mm finishing mill unit in large distance situation, rolled piece is easily caused to pile steel between intermediate mill and mm finishing mill unit; Or heap draws coefficient control improper, cause rolled piece to pile between its two unit and draw steel, muscle indulged by screw-thread steel and horizontal bar is defective; Meanwhile, cause rolling line rejection number to rise, operating rate declines, and the output of rolling line does not reach promising result.
And the present invention breaches the continuous frame number of grooveless rolling can not can not be greater than the technical bottleneck of 10m etc. more than centre-to-centre spacing between 4 sorties, frame, the design of reasonable applied metal theory of plastic deformation, metal least resistance principle, Pass, second flow principle etc., rolled piece cross dimensions and the rolling parameter of each passage of optimal design, spread analysis and bight Variation Features, appropriate design and layout guide and guard, obtain the breakthrough of milling train spacing.
Rolled piece section and rolling parameter design: according to iron company's status of equipment, for improving rolling stability, grooveless rolling test employing side-square-square groove.By the collection to on-the-spot actual parameter, what adopt the Return Law to establish to be applicable to Bar Wire Product grooveless rolling spreads computing formula, has summed up the pressure deformation rule of each passage, has optimized technological procedure.
Grooveless rolling bight feature: owing to there is turn over spread during grooveless rolling, every time is all changing thus to make 4 angles of rolled piece.Facts have proved, owing to devising rational rolling parameter, under the effect that turn over spread and cydariform spread, rolled piece bight is the round edge obtuse angle be made up of circular arc and straight line.This round edge obtuse angle can avoid stress concentrate and crack effectively.
The breakthrough that milling train spacing obtains: 4 frame close-coupled pass-free rolling mill centre-to-centre spacing of J. P. Morgan & Co. and Bu Zi POLO company designs are 1.22m, the milling train centre-to-centre spacing of 4 frame grooveless rollings of POMINI company designs is 1.5m, and the milling train centre-to-centre spacing of Xi'an Sheng day science and technology test has broken the limitation that the grooveless rolling technology that it has been generally acknowledged that is adapted at close-coupled layout milling train is applied.
Originally traditional groove rolling, the process spare part such as roll and guide and guard commonality is poor, and roll working life is low, and required power is large, and milling train shares blank difference, operating rate and lumber recovery low; Grooveless rolling technique rolling between Large space frame originally, cross steel success rate low, operating rate and annual production are very low, unsuccessful application rolling principle.
Grooveless rolling of the present invention has 38-45m in the centre-to-centre spacing of intermediate mill and mm finishing mill unit, breach the mode of common metal machining deformation, breach grooveless rolling bottleneck, for industrialization large-scale production is laid a good foundation, improve the pattern of China's intermetallic composite coating distortion.
Large space grooveless rolling technology of the present invention has following characteristics: (1) work roll cooling cycle lengthens, and reworkable number of times increases, and finally scrap diameter much larger than grooved roll of the same type, roll hardness layer is fully utilized.(2) roll wear is even, and Lathe quantity is little, enormously simplify turn machining operation.(3) roll barrel can make full use of, and greatly reduces roller consumption.Owing to not having the restriction of taper of groove and roll abutment wall, the utilization rate of barrel length can improve 20% ~ 30%.(4) roll degree of commonality is high, and stockage significantly reduces.(5) corresponding guide and guards is simplified.(6) eliminate the speed difference of rolled piece short transverse in groove rolling, deformation of rolled wire is more even, reduces rolling load.(7) adjust simple operation, compare the replacing quantity that groove rolling greatly reduces milling train when kind is switched, required workpiece measurement can be rolled out by adjustment roll gap simultaneously, stable rolling can be realized fast.(8) good product quality, lumber recovery is high.
After adopting the present invention, produce huge social benefit:
1. economic benefit is roll consumption year: 10/year × 1.8 ten thousand yuan /+20/years × 1.3 ten thousand yuan /=44.00 ten thousand yuan/year;
2. reduce Roller Machining and take saving benefit;
3. improve operating rate: save 10 minutes every day, within 300 days, calculate according to annual effective operation number of days: (10 minutes × 300 days) ÷ 1440 minutes/day × 3300 tons=6874.00 tons;
Year economic benefit is: 6874 tons × 300 yuan=206.22 ten thousand yuan;
4. reduce power consumption:
6.30kwh/ ton × 0.35 yuan/kwh × 1000000 ton=220.50 ten thousand yuan
Iron company is at every bar line grooveless rolling Project Benefit:
Add up to 44.00+206.22+220.50=470.72 ten thousand yuan.
Accompanying drawing explanation
Fig. 1 is apparatus of the present invention structural representations.
Fig. 2 is the top view of Fig. 1.
Fig. 3 is present invention process flow chart.
In figure: 1, guide and guard point; 2, box body; 3, horizontal roller support; 4, horn mouth; 5, front vertical deflector roll; 6, rear vertical deflector roll; 7, horizontal guide roller; 8, base; 9, adjusting nut; 10, T-shaped clamping screw; 11, homophony screw rod; 12, locking nut.
1-1, roughing mills 2-1,1# flying shear 3-1, intermediate mill 4-1,2# flying shear 5-1, mm finishing mill unit.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The present embodiment device as shown in Figure 1, a kind of rolling device of production line of bar Large space anapsid, comprise base 8, and the box body 2 be arranged on base 8, box body 2 is connected with base 8 by adjusting nut 9, the right-hand member of box body 2 is provided with horizontal roller support 3, and horizontal roller support 3 is connected with base 8 by T-shaped clamping screw 10; The leading section of box body 2 is provided with guide and guard point 1, is provided with vertical deflector roll in the middle part of box body 2, horizontal roller support 3 is provided with horizontal guide roller 7, horizontal guide roller 7 has two, and along the parallel distribution of horizontal roller support about 3, horizontal guide roller 7 being arranged in horizontal roller support 3, deflector roll adjustment is proper flexibly; Further, horizontal roller support 3 is connected with horn mouth 4.
See Fig. 2 and shown in composition graphs 1, the vertical deflector roll be arranged on box body 2 has four, vertical deflector roll 5 and two vertical deflector roll 6 afterwards before being respectively two, and vertical deflector roll 5 and two are provided with homophony screw rod 11 between vertical deflector roll 6 afterwards before two.Horn mouth 4 is fixed on horizontal roller support 3 by locking nut 12.
Shown in Figure 3, production line is formed primarily of with lower part, is respectively roughing mills 1-1,1# flying shear 2-1, intermediate mill 3-1,2# flying shear 4-1, mm finishing mill unit 5-1.The rolling device that this invention takes above-mentioned anapsid uses as the equipment of roughing mills 1-1, intermediate mill 3-1 and mm finishing mill unit 5-1, wherein: roughing mills 1-1 and intermediate mill 3-1 spacing have 9.4m, and intermediate mill 3-1 and mm finishing mill unit 5-1 spacing have 43m.
The thick intermediate mill of certain Steel stock Co., Ltd's production line of bar adopts the new technology of anapsid Large space rolling, and finish rolling adopts splitting rolling, and produce Φ 12-Φ 40mm screw-thread steel, embodiment is as follows:
1, heat
Steel billet is heated on heating furnace inner edge stepping limit, when steel billet steps to heating furnace furnace delivery table, is uniformly heated 1050 DEG C, is then delivered on the outer furnace delivery table of stove by furnace delivery table in stove.
2, rolling
2.1, the steel billet after coming out of the stove is transported to roughing mills by furnace delivery table and enters first milling train and be rolled.If for a certain reason, steel billet can not send into milling train, and steel billet is transplanted on by useless base device for eliminating rejects on stand, then to be hung by steel billet in the other mistake of furnace delivery table across on dolly by crane, by cross across dolly steel billet sent back to raw material across.
2.2, steel billet is at Φ 550 × 6 roughing mills, adopts new technology rolling 6 passages of grooveless rolling, rolls into the section of 65mm; After roughing mills, flying shear cuts hypertrophy and the lower head and tail of temperature, then enters Φ 450 × 6 intermediate mill rolling 6 passages, rolls into 30mm side section; After crop, rolled piece continues to enter Φ 350 × 6 mm finishing mill unit, different according to product specification, a rolling 4--6 passage, produces the screw-thread steel of Φ 12-Φ 40mm finished product section.
Rolled piece adopts mild tension condition rolling between each frame of roughing mills, between thick intermediate mill and between the first five frame of intermediate mill; Between intermediate mill five or six frame, between middle mm finishing mill unit and between each frame of mm finishing mill unit, be provided with kink, rolled piece can realize the rolling of no-station pole canopy tower-loop control; Full rolling line milling train adopts horizontally and vertically alternative to arrange, realizes without reversing rolling.
3, cool
What 3.1, mm finishing mill unit shut out needs the rolled piece carrying out Water cooling, enters the Water cooling device after being arranged on mm finishing mill unit and cools, and Ribbed Bar can be made to improve strength grade.Do not need the rolled piece carrying out Water cooling to be delivered directly to multi-length shear by roller-way, carry out nibbling shear.Rolled piece after water-cooled continues to be sent to multiple length sectional flying shear machine place, clamps feeding sectional flying shear by pinch roll before multiple length sectional flying shear machine, cuts into the merchantable timber multiple lengths adapting to cold bed length.
3.2, the multiple length rolled piece after segmentation is delivered in the teeth groove of walking beam cooler by cold-bed run-in table and hydraulically powered braking poking device, and rolled piece is pulled in process at poking device, relies on the sliding friction between rolled piece and brake block to brake and stops.Rolled piece, after straightening plate section tides over hot stage, the rack segments being sent to cold bed cools.Rolled piece advances in the stepping of cooling limit, cold bed top, is alignd in rolled piece one end by alignment roller table at tooth bar latter end, and then by carry-over bar, rolled piece is delivered on the step chain strip device of cold bed end, step chain with different step pitch stepwise operations, forms not stacking solid matter steel layer according to different trimmed sizes.When the rolled piece radical that step chain is collected reaches cold shears shearing radical, the steel discharging trolley be arranged on below step chain rises, and holds up the steel layer on chain, is moved on cold bed runout table.
4, finishing
After cold bed runout table, be provided with fixed ruler cold shear machine, the multiple length steel cutting in a row sent here by cold bed runout table is become merchantable timber length.Steel after shearing are delivered on the roller-way before transfer bank by cutting rear roller-way, fast steel group is across inspection stand from rollgang transfer by moving steel dolly, on inspection with Auto-counting after, fall into piling table, transport bundling district to, carry out automatic bundling, then deliver to finished product and weigh, send finished product stockyard to deposit and wait for delivery.
This Project Product has formulated company standard at present, and through the bar mill production line success rolling of large-scale iron and steel joint-stock company of domestic several family, rolled bands rib reinforcement:
delivery length: 6 ~ 12m daily output reaches 4300 tons/day, and annual output can reach 1,100,000 tons/year, and practical probation is respond well.The technology of this Project Product is in international advanced person and domestically leading level, aborning environmentally safe.
Above-mentioned roughing mills 1-1 and intermediate mill 3-1 spacing have 9.4m, and intermediate mill 3-1 and mm finishing mill unit 5-1 spacing can be 38-45m.
Steel billet can be 1000-1050 DEG C on heating furnace inner edge stepping limit by heating temperature range.Third step 2) in rolled piece tide over the temperature of hot stage in straightening plate section can for 800-900 DEG C, then on the rack segments delivering to cold bed, rolled piece temperature can be 750-800 DEG C.
These are only the preferred embodiment of the present invention, protection scope of the present invention is not limited thereto, and any those skilled in the art, in open scope of the present invention, can be easy to the change carried out or change is all encompassed within protection scope of the present invention.Therefore, protection scope of the present invention should be as the criterion with the protection domain of claims.
Claims (2)
1. a production line of bar Large space grooveless rolling method, comprises the steps:
The first step heats
Steel billet is heated on heating furnace inner edge stepping limit, when steel billet steps to heating furnace furnace delivery table, then delivers on the outer furnace delivery table of stove by furnace delivery table in stove;
Second step rolling
1) steel billet after coming out of the stove is transported to roughing mills by furnace delivery table and enters first milling train and be rolled;
2) steel billet is at roughing mills, adopts the rolling of grooveless rolling device, rolls into roughing side's section; Flying shear cuts head and the afterbody of this side's section rolled piece, then enters intermediate mill rolling, the side's of rolling section in rolling into; After cutting head, rolled piece continues to enter mm finishing mill unit rolling, obtains the screw-thread steel of finished product section;
3rd step cooling
1) the part rolled piece that mm finishing mill unit shuts out enters Water cooling device and cools; Part rolled piece is transported to multi-length shear, carries out nibbling shear; Rolled piece after water-cooled continues sectional flying shear, cuts into the merchantable timber multiple lengths adapting to cold bed length;
2) the multiple length rolled piece after segmentation is delivered in the teeth groove of walking beam cooler, and rolled piece, after straightening plate section tides over hot stage, the rack segments being sent to cold bed cools; Cooled rolled piece forms solid matter steel layer through step chain strip device, then is moved on cold bed runout table through steel discharging trolley;
4th step finishing
By the multiple length rolled piece in a row sent here by cold bed runout table, on inspection with Auto-counting after, fall into piling table, bundling, finished product is weighed, and stockyard is deposited;
It is characterized in that, roughing mills and intermediate mill spacing have 9.4m, and the spacing of intermediate mill and mm finishing mill unit has 38-45m;
Described steel billet is 1000-1050 DEG C on heating furnace inner edge stepping limit by heating-up temperature;
Described roughing mills milling train model Φ 550 × 6, roughing 6# frame side's section is 65mm;
Described intermediate mill milling train model Φ 450 × 6, in roll 12# frame side section be 30mm;
Described mm finishing mill unit milling train model Φ 350 × 6, finish rolling finished product section Φ 12-Φ 40mm;
Rolled piece bight is the round edge obtuse angle be made up of circular arc and straight line;
Rolled piece adopts mild tension condition rolling between each frame of described roughing mills, between thick intermediate mill and between the first five frame of intermediate mill; Between intermediate mill 11 and 12 frame, be provided with kink between middle mm finishing mill unit and between each frame of mm finishing mill unit, rolled piece realizes the rolling of no-station pole canopy tower-loop control; Full rolling line milling train adopts horizontally and vertically alternative to arrange, realizes without reversing rolling;
Described 3rd step 2) in the rolled piece temperature of tiding over hot stage in straightening plate section be 800-900 DEG C, then on the rack segments delivering to cold bed, rolled piece temperature is 750-800 DEG C.
2. the rolling device of method employing according to claim 1, comprise base (8), and the box body (2) be arranged on base (8), it is characterized in that, one end of described box body (2) is provided with horizontal roller support (3), the other end of box body (2) is provided with guide and guard point (1), (2) are provided with vertical deflector roll to described box body, described horizontal roller support (3) is provided with horizontal guide roller (7), and horizontal roller support (3) is connected with horn mouth (4);
The described vertical deflector roll be arranged on box body (2) has four, vertical deflector roll (5) and two vertical deflector roll (6) afterwards before being respectively two, and vertical deflector roll (5) and two stand afterwards between deflector roll (6) and are provided with homophony screw rod (11) before two;
The described horizontal guide roller (7) be arranged on horizontal roller support (3) has two, and along the upper and lower parallel distribution of horizontal roller support (3);
Described horn mouth (4) is fixed on horizontal roller support (3) by locking nut (12).
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| CN201210412130.7A CN102896147B (en) | 2012-10-25 | 2012-10-25 | A kind of rolling device of production line of bar Large space anapsid and milling method |
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| CN102896147B true CN102896147B (en) | 2016-02-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103909099B (en) * | 2013-07-18 | 2016-05-25 | 新疆八一钢铁股份有限公司 | A kind of method of eliminating sucker-rod steel section shear fissure |
| CN110153199A (en) * | 2019-05-20 | 2019-08-23 | 北京科技大学 | A kind of controlled rolling method of large scale rod bar |
| CN111215447A (en) * | 2019-11-20 | 2020-06-02 | 盐城市联鑫钢铁有限公司 | Process method for reducing differential cutting line of multi-section deformed steel bar |
| CN112387780A (en) * | 2020-06-09 | 2021-02-23 | 山东鲁丽钢铁有限公司 | Novel steel rolling production process |
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