CN103722008A - Slitting rolling method for 19mm deformed steel bars - Google Patents

Slitting rolling method for 19mm deformed steel bars Download PDF

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Publication number
CN103722008A
CN103722008A CN201310729092.2A CN201310729092A CN103722008A CN 103722008 A CN103722008 A CN 103722008A CN 201310729092 A CN201310729092 A CN 201310729092A CN 103722008 A CN103722008 A CN 103722008A
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CN
China
Prior art keywords
rolling
pass
mill
slitting
cutting
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CN201310729092.2A
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Chinese (zh)
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CN103722008B (en
Inventor
刘桂华
刘宝超
王炳霞
齐孝楠
张宝民
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天津钢铁集团有限公司
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Abstract

The invention relates to a slitting rolling method for 19mm deformed steel bars. According to the method, two slitting rolling technologies are adopted, 150 square billets pass six roughing mill groups sequentially, after six rolling passes of eight intermediate mill groups, rolled pieces are processed into 27X44 flat bars, the flat bars enter a 16H/V slitting stand in a centered manner to be rolled to two parallel rolled pieces with 1.6mm ligaments after entering a finishing mill group 15H to be processed, the two parallel rolled pieces are then slit into two independent rolled pieces through a single-blade slitting wheel mounted on 16H/V outlet slitting guide, and the two rolled pieces enter roll groove channels of rolling mills 17H and 18H/V respectively and independently to be rolled into two phi19mm ribbed steel bars identical in size and shape. Productivity is increased by 15% as compared with that of one-strand rolling technology, rolling speed is decreased by 40%, equipment can operate stably, and production efficiency is improved.

Description

The cutting and rolling method of 19mm screw-thread steel
Technical field
The invention belongs to screw-thread steel cutting rolling technology field, particularly a kind of cutting and rolling method of 19mm screw-thread steel.
Background technology
In spiral is produced, a steel billet, through roughing unit, intermediate mill rolling, is cut into rolled piece in mm finishing mill unit to more than two or two rolled piece arranged side by side, be called splitting rolling.
In Unite States Standard ASTMA615/A615M-08b, relating to the reinforcing bar trade mark has 3,4,5,6,7,8,9,10,11,14,18, and corresponding nominal diameter is respectively 10,13,16,19,22,25,29,32,36,43,57.It is 3,4,5,6,7,8,10,11 that American Standard screw-thread steel exports the conventional trade mark, the wherein trade mark 4 and 6 corresponding reinforcing bar nominal diameter 13mm and 19mm, in China Concrete-used Hot-rolling Ribbed Reinforcing Bar operative norm GB1499.2-2007, there is no the finished size regulation of 13mm and 19mm specification, belong to non-GB specification, need to, according to information such as the meter Chong of American Standard regulation, internal diameters, two kinds of reinforcing bar finished sizes be designed, and then the key in design rolling mill practice, i.e. pass schedule design.
Summary of the invention
The present invention provides a kind of and enhances productivity and the cutting and rolling method of the 19mm screw-thread steel of stabilization of equipment performance for solving the technical problem existing in known technology.
The technical scheme that the present invention takes for the technical problem existing in solution known technology is:
A cutting and rolling method for 19mm screw-thread steel, has completely 18 rolling mills, and horizontally and vertically alternative arranges, described 18 rolling mills be divided into roughing, in roll, three units of finish rolling, wherein roughing unit has 6 rolling mills, milling train is numbered 1H, 2V, 3H, 4V, 5H, 6V; Intermediate mill has 8 rolling mills, is numbered 7H, 8V, 9H, 10V, 11H, 12V, 13H, 14V; Mm finishing mill unit 4 rolling mills, milling train is numbered 15H, 16H/V, 17H, 18H/V;
6 passages of described roughing unit rolling, the pass schedule that pass is identical with Ф 18mm screw-thread steel two slit rolling process; 8 passages of intermediate mill, front 4 road passes adopt the pass schedule shared with two splitting rolling Ф 18mm screw-thread steels, the 11st, the empty mistake of 12 rolling mills, the 13rd rolling mill is plain-barreled roll, the circular rolled piece that the 10th rolling mill rolls out enters the 13rd rolling mill rolling, carry out unrestricted spread, side pressure sidewall of pass top every limit radius of the radian R1=7.3mm that the 14th rolling mill adopts, roll gap radius of the radian R2=4mm, β=7.7 °, sidewall oblique angle, pass notch inner width b=24.5mm, outer wide B=29.6mm, the high H=43.9mm of pass, the pass L=11.73mm that rises as high as the banks, roll gap S=6mm.
β=30 °, described mm finishing mill unit 15H rolling mill pre-slit pass sidewall oblique angle, slitting angle α=74 °, arc radius R1=10.7mm, the high H=26.3mm of pass, the high h=12.7mm of cutting sword, slitting angle radius of the radian R2=4.5mm, roll gap S=3.0mm, two hole centre-to-centre spacing b=25.4mm, pass groove width B=51.2mm; Pre-cutting hole two holes are contour, symmetric design, 30 ° of the angles of wedge outside pass, 74 ° of the angles of wedge in pass, radian 4.5mm;
Mm finishing mill unit 16H/V is cutting sortie, angle of sides β=35 °, slitting angle α=61 °, arc radius R1=11.65mm, the high H=23.3mm of pass, two hole centre-to-centre spacing b=27mm, pass groove width B=54.3mm, slitting angle radius of the radian R2=0.8mm, roll gap S=1.6mm, slitting pass two lines are contour, symmetric design, 35 ° of the angles of wedge outside pass, 61 ° of the angles of wedge in pass, radian 0.8mm, cutting sword spacing is identical with pass roll gap, is all 1.6mm.
Described the 14th rolling mill is processed into supplied materials 27 × 44 band steel.
Described the 15th rolling mill is processed into dog bone shape rolled piece symmetrically by 27 × 44 band steel.
Advantage and good effect that the present invention has are: the present invention adopts two slit rolling process, 150 square billets are successively by 6 roughing units, after 6 passage rollings of 8 intermediate mills, rolled piece is processed into 27 × 44 band steels, enter after mm finishing mill unit 15H processing, centering enters 16H/V frame cutting sortie, be rolled into two rolled pieces in parallel with 1.6mm ligament, again by being arranged on the single-blade slitting wheel of 16H/V outlet Cutting guide, be divided into 2 independently rolled pieces, 2 rolled pieces enter separately 17H frame separately, the groove passage of 18H/V rolling mill, roll out 2 Ф 19mm Ribbed Bar that size and dimension is identical, make the equipment can stable operation, improved production efficiency.
Accompanying drawing explanation
Fig. 1 is side pressure pass structure schematic diagram;
Fig. 2 is pre-slit pass structural representation;
Fig. 3 is slitting pass structural representation.
The specific embodiment:
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
A cutting and rolling method for 19mm screw-thread steel, has 18 rolling mills completely, horizontally and vertically alternative layout, and 16 sorties come into operation.18 rolling mills be divided into roughing, in roll, three units of finish rolling, wherein roughing unit has 6 rolling mills, milling train is numbered 1H, 2V, 3H, 4V, 5H, 6V; Intermediate mill has 8 rolling mills, is numbered 7H, 8V, 9H, 10V, 11H, 12V, 13H, 14V; Mm finishing mill unit 4 rolling mills, milling train is numbered 15H, 16H/V, 17H, 18H/V; H represents horizontal frames, and V represents Vertical Rack, and H/V represents the convertible frame of Ping Li.
When producing 19 millimeters of Ribbed Bar of two cutting Ф, 16H/V frame and 18H/V rolling mill form are horizontal.6 passages of roughing unit rolling, the pass schedule that pass is identical with Ф 18mm screw-thread steel two slit rolling process, 8 passages of intermediate mill, front 4 road passes adopt the pass schedule shared with two splitting rolling Ф 18mm screw-thread steels, just some sortie gap values between rollers is wherein adjusted, the 11st, empty cross (i.e. the 5th and 6 passages) of 12 rolling mills, the 7th passage is plain-barreled roll, the circular rolled piece that the 10th rolling mill rolls out enters this sortie rolling, carry out unrestricted spread, the 8th passage (the 14th rolling mill) adopts side pressure pass as shown in Figure 1, every limit, sidewall of pass top radius of the radian R1=7.3mm, roll gap radius of the radian R2=4mm, β=7.7 °, sidewall oblique angle, pass notch inner width b=24.5mm, outer wide B=29.6mm, the high H=43.9mm of pass, the pass L=11.73mm that rises as high as the banks, roll gap S=6mm, side pressure pass deflection is little, lengthening coefficient 1.15, through the 14th rolling mill, supplied materials is processed into the band steel of 27*44.
Mm finishing mill unit first be 15H rolling mill pre-slit pass as shown in Figure 2, angle of sides β=30 °, slitting angle α=74 °, arc radius R1=10.7mm, the high H=26.3mm of pass, the high h=12.7mm of cutting sword, slitting angle radius of the radian R2=4.5mm, roll gap S=3.0mm, two hole centre-to-centre spacing b=25.4mm, pass groove width B=51.2mm; Pre-cutting hole two holes are contour, symmetric design, 30 ° of the angles of wedge outside pass, 74 ° of the angles of wedge in pass, radian 4.5mm.This pass is processed into dog bone shape rolled piece symmetrically by 27*44 band steel.
Mm finishing mill unit 16H/V is cutting sortie, pass as shown in Figure 3, angle of sides β=35 °, slitting angle α=61 °, arc radius R1=11.65mm, the high H=23.3mm of pass, two hole centre-to-centre spacing b=27mm, pass groove width B=54.3mm, slitting angle radius of the radian R2=0.8mm, roll gap S=1.6mm.Slitting pass two lines are contour, symmetric design, 35 ° of the angles of wedge outside pass, 61 ° of the angles of wedge in pass, radian 0.8mm.Cutting sword spacing is identical with pass roll gap, is all 1.6mm, can stablize and successfully rolled piece is machined to the critical condition that two rolled pieces in parallel are split out, and the single-blade slitting wheel that is conducive to milling train outlet Cutting guide is torn rolled piece exactly.
The present invention adopts two slit rolling process, 150 square billets are successively by 6 roughing units, after 6 passage rollings of 8 intermediate mills, rolled piece is processed into 27*44 band steel, entering mm finishing mill unit 15H is processed into after shape as shown in Figure 2, centering enters 16H/V frame cutting sortie, be rolled into two rolled pieces in parallel with 1.6mm ligament as shown in Figure 3, again by being arranged on the single-blade slitting wheel of 16H/V outlet Cutting guide, be divided into 2 independently rolled pieces, 2 rolled pieces enter separately 17H frame separately, the groove passage of 18H/V rolling mill, roll out 2 Ф 19mm Ribbed Bar that size and dimension is identical.
Above embodiment is only in order to illustrate that technical scheme of the present invention is not intended to limit, and those of ordinary skill in the field should be appreciated that still and can modify or part technical characterictic is equal to replacement the specific embodiment of invention; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the technology of request protection of the present invention.

Claims (3)

1. a cutting and rolling method for 19mm screw-thread steel, has completely 18 rolling mills, and horizontally and vertically alternative arranges, described 18 rolling mills be divided into roughing, in roll, three units of finish rolling, wherein roughing unit has 6 rolling mills, milling train is numbered 1H, 2V, 3H, 4V, 5H, 6V; Intermediate mill has 8 rolling mills, is numbered 7H, 8V, 9H, 10V, 11H, 12V, 13H, 14V; Mm finishing mill unit 4 rolling mills, milling train is numbered 15H, 16H/V, 17H, 18H/V; It is characterized in that,
6 passages of described roughing unit rolling, the pass schedule that pass is identical with Ф 18mm screw-thread steel two slit rolling process; 8 passages of intermediate mill, front 4 road passes adopt the pass schedule shared with two splitting rolling Ф 18mm screw-thread steels, the 11st, the empty mistake of 12 rolling mills, the 13rd rolling mill is plain-barreled roll, the circular rolled piece that the 10th rolling mill rolls out enters the 13rd rolling mill rolling, carry out unrestricted spread, side pressure sidewall of pass top every limit radius of the radian R1=7.3mm that the 14th rolling mill adopts, roll gap radius of the radian R2=4mm, β=7.7 °, sidewall oblique angle, pass notch inner width b=24.5mm, outer wide B=29.6mm, the high H=43.9mm of pass, the pass L=11.73mm that rises as high as the banks, roll gap S=6mm.
β=30 °, described mm finishing mill unit 15H rolling mill pre-slit pass sidewall oblique angle, slitting angle α=74 °, arc radius R1=10.7mm, the high H=26.3mm of pass, the high h=12.7mm of cutting sword, slitting angle radius of the radian R2=4.5mm, roll gap S=3.0mm, two hole centre-to-centre spacing b=25.4mm, pass groove width B=51.2mm; Pre-cutting hole two holes are contour, symmetric design, 30 ° of the angles of wedge outside pass, 74 ° of the angles of wedge in pass, radian 4.5mm;
Mm finishing mill unit 16H/V is cutting sortie, angle of sides β=35 °, slitting angle α=61 °, arc radius R1=11.65mm, the high H=23.3mm of pass, two hole centre-to-centre spacing b=27mm, pass groove width B=54.3mm, slitting angle radius of the radian R2=0.8mm, roll gap S=1.6mm, slitting pass two lines are contour, symmetric design, 35 ° of the angles of wedge outside pass, 61 ° of the angles of wedge in pass, radian 0.8mm, cutting sword spacing is identical with pass roll gap, is all 1.6mm.
2. the cutting and rolling method of 19mm screw-thread steel according to claim 1, is characterized in that, described the 14th rolling mill is processed into supplied materials 27 × 44 band steel.
3. the cutting and rolling method of 19mm screw-thread steel according to claim 1, is characterized in that, described the 15th rolling mill is processed into dog bone shape rolled piece symmetrically by 27 × 44 band steel.
CN201310729092.2A 2013-12-20 2013-12-20 The cutting and rolling method of Ф 19mm screw-thread steel CN103722008B (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057348A (en) * 2015-08-03 2015-11-18 四川省川威集团有限公司 Method for producing ribbed reinforcing bars of phi 25mm by adopting two-slitting rolling
CN105880294A (en) * 2016-05-24 2016-08-24 山东钢铁股份有限公司 Pass design for full-thread rebar
CN106311750A (en) * 2016-08-31 2017-01-11 云南德胜钢铁有限公司 Pre-cutting and cutting hole type of mill
CN107671121A (en) * 2017-09-29 2018-02-09 四川德胜集团钒钛有限公司 A kind of rolling groove structure
CN109127725A (en) * 2018-08-17 2019-01-04 石横特钢集团有限公司 A kind of Round Steel Slit Rolling technique
CN109590328A (en) * 2018-12-11 2019-04-09 南京钢铁股份有限公司 A kind of bar segmentation lines difference fast adjustment method
CN111266403A (en) * 2020-03-04 2020-06-12 新兴铸管股份有限公司 Process for rolling phi 15mm PSB830 twisted steel

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JPS5881503A (en) * 1981-11-06 1983-05-16 Nippon Kokan Kk <Nkk> Precision rolling method for steel bar
CN201150930Y (en) * 2008-01-18 2008-11-19 河北理工大学 Forced spread pass structure for strip milling
KR20090070889A (en) * 2007-12-27 2009-07-01 현대제철 주식회사 Method for slite of large size steel reinforcement
CN101992211A (en) * 2009-08-28 2011-03-30 江苏永钢集团有限公司 Two-strand split production technology for 13 mm-British standard ribbed bar
CN102000694A (en) * 2010-09-29 2011-04-06 莱芜钢铁股份有限公司 Processing method and system for deformed steel bar
CN103042029A (en) * 2013-01-07 2013-04-17 河北钢铁股份有限公司唐山分公司 Phi22mm ribbed twisted steel slit rolling method

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Publication number Priority date Publication date Assignee Title
JPS5881503A (en) * 1981-11-06 1983-05-16 Nippon Kokan Kk <Nkk> Precision rolling method for steel bar
KR20090070889A (en) * 2007-12-27 2009-07-01 현대제철 주식회사 Method for slite of large size steel reinforcement
CN201150930Y (en) * 2008-01-18 2008-11-19 河北理工大学 Forced spread pass structure for strip milling
CN101992211A (en) * 2009-08-28 2011-03-30 江苏永钢集团有限公司 Two-strand split production technology for 13 mm-British standard ribbed bar
CN102000694A (en) * 2010-09-29 2011-04-06 莱芜钢铁股份有限公司 Processing method and system for deformed steel bar
CN103042029A (en) * 2013-01-07 2013-04-17 河北钢铁股份有限公司唐山分公司 Phi22mm ribbed twisted steel slit rolling method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105057348A (en) * 2015-08-03 2015-11-18 四川省川威集团有限公司 Method for producing ribbed reinforcing bars of phi 25mm by adopting two-slitting rolling
CN105880294A (en) * 2016-05-24 2016-08-24 山东钢铁股份有限公司 Pass design for full-thread rebar
CN105880294B (en) * 2016-05-24 2018-02-09 山东钢铁股份有限公司 The hole type design of complete thread reinforcing steel bar
CN106311750A (en) * 2016-08-31 2017-01-11 云南德胜钢铁有限公司 Pre-cutting and cutting hole type of mill
CN106311750B (en) * 2016-08-31 2019-05-31 云南德胜钢铁有限公司 The pre- cutting of milling train and slitting pass
CN107671121A (en) * 2017-09-29 2018-02-09 四川德胜集团钒钛有限公司 A kind of rolling groove structure
CN109127725A (en) * 2018-08-17 2019-01-04 石横特钢集团有限公司 A kind of Round Steel Slit Rolling technique
CN109590328A (en) * 2018-12-11 2019-04-09 南京钢铁股份有限公司 A kind of bar segmentation lines difference fast adjustment method
CN111266403A (en) * 2020-03-04 2020-06-12 新兴铸管股份有限公司 Process for rolling phi 15mm PSB830 twisted steel

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