CN103706632B - The cutting and rolling method of Ф 13mm screw-thread steel - Google Patents
The cutting and rolling method of Ф 13mm screw-thread steel Download PDFInfo
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Abstract
A kind of cutting and rolling method of Ф 13mm screw-thread steel, adopt three-slitting rolling technique, 150 square billets are successively by 6 frame roughing mills, after 7 passes of 8 frame intermediate mills, rolled piece is processed into band steel, after entering the processing of mm finishing mill unit 15H pre-slit pass, centering enters 16H/V frame cutting sortie, only 0.1mm is differed because pre-cutting and slitting pass design middle two pitchs of holes, therefore rolled piece precise alignment in slitting pass of pre-cutting dog bone shape can be ensured, be rolled into three rolled pieces in parallel with 0.9mm ligament, the twolip slitting wheel of Cutting guide is exported again by being arranged on 16H/V, be divided into 3 independently rolled pieces, 3 rolled pieces enter separately 17H frame separately, the groove passage of 18H/V rolling mill, roll out the Ф 13mm Ribbed Bar that 3 size and dimensions are identical.This production technology is produced can improve 17% than two slit rolling process machine, reduces mill speed simultaneously, enables equipment stable operation, improve production efficiency.
Description
Technical field
The invention belongs to screw-thread steel cutting rolling technology field, particularly a kind of cutting and rolling method of Ф 13mm screw-thread steel.
Background technology
In spiral is produced, by a steel billet through roughing mills, intermediate mill rolling, in mm finishing mill unit, rolled piece is cut into the rolled piece of more than two or two arranged side by side, is called splitting rolling.
Relate to the reinforcing bar trade mark in Unite States Standard ASTMA615/A615M-08b and have 3,4,5,6,7,8,9,10,11,14,18, corresponding nominal diameter is 10,13,16,19,22,25,29,32,36,43,57 respectively.It is 3,4,5,6,7,8,10,11 that American Standard screw-thread steel exports the conventional trade mark, wherein corresponding reinforcing bar nominal diameter 13mm and 19mm of the trade mark 4 and 6, in China Concrete-used Hot-rolling Ribbed Reinforcing Bar operative norm GB1499.2-2007, the finished size of 13mm and 19mm specification is not had to specify, belong to non-GB specification, need the information such as meter Chong, internal diameter specified according to American Standard, two kinds of reinforcing bar finished sizes are designed, and then the key in design rolling mill practice, i.e. pass schedule design.Patent of invention CN101992211A, " 13 millimeters the cutting of English marker tape rib reinforcement two produce techniques ", elaboration be that employing two slit rolling process produces 13 millimeters of English mark screw-thread steels, production efficiency is low.
Summary of the invention
The present invention provides a kind of and enhances productivity and the cutting and rolling method of Ф 13mm screw-thread steel of stabilization of equipment performance for solving in known technology the technical problem that exists.
The technical scheme that the present invention takes for the technical problem existed in solution known technology is:
A cutting and rolling method for Ф 13mm screw-thread steel, comprises 18 rolling mills, horizontally and vertically alternative arrange, described 18 rolling mills be divided into roughing, in roll, finish rolling three units, wherein roughing mills has 6 rolling mills, and 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 mill, milling train is numbered 15H, 16H/V, 17H, 18H/V; Described roughing mills rolling 6 passages, pass adopts the pass that 14mm screw-thread steel three-slitting rolling technique is identical; Intermediate mill 8 passages, front 4 road passes adopt the pass shared with three-slitting rolling Ф 14mm screw-thread steel,
The empty mistake of 12nd rolling mill, the 11st rolling mill and the 13rd rolling mill are plain-barreled rolls, the 14th rolling mill sidewall of pass top every limit radius of the radian R1=3.27mm, roll gap radius of the radian R2=5.5mm, pass notch inner width b=18.75mm, outer wide B=23.7mm, pass height H=47.3mm, roll gap S=6mm;
Described mm finishing mill unit 15H rolling mill pre-slit pass 1,3 line cylindrical angle of sides β=31.5 °, cylindrical slitting angle α=47.24 °, arc radius R1=8.67mm, pass height H=17.33mm, middle 2 string holes type slitting angle θ=42.16 °, arc diameter Ф=17.35mm, cutting sword height h=7.55mm, slitting angle radius of the radian R2=1.5mm, roll gap S=4mm, interstitial hole groove width B1=17.9mm, two side holes centre-to-centre spacing is B2=35.45mm, B3=36.45mm;
Described mm finishing mill unit 16H/V is cutting sortie, adopt three lines contour, pass 1,3 line cylindrical angle of sides β=35 °, cylindrical slitting angle α=31.58 °, arc radius R1=7.9mm, pass height H=15.8mm, both sides pass centre-to-centre spacing outwards respectively expands 0.25mm, this structure and pre-slit pass setted structure, pre-cutting two side holes type centre-to-centre spacing respectively reduces 0.5mm inwards; Middle 2 string holes type slitting angle θ=23.3 °, arc diameter Ф=15.8mm, interstitial hole centre-to-centre spacing increases 0.1mm than pre-slit pass, B1=18mm, B2=37mm, B3=37.5mm, slitting angle radius of the radian R2=0.9mm, roll gap S=0.9mm, cutting sword spacing is identical with pass roll gap, is all 0.9mm.
Described 16H/V frame and 18H/V rolling mill form are horizontal.
Supplied materials is processed into the band steel of the little 0.4-0.6mm of middle ratio two edge size by described 14th rolling mill.
Described band steel depth-width ratio is 0.4.
The pre-cutting hole interstitial hole of described mm finishing mill unit 15H rolling mill is than two side holes height 0.02mm, and both sides pass centre-to-centre spacing respectively reduces 0.5mm inwards, and cylindrical slitting angle α differs 5 ° with middle 2 string holes type slitting angle θ, band steel is processed into three disjunctor rolled pieces in parallel.
The advantage that the present invention has and good effect are: the present invention adopts three-slitting rolling technique, 150 square billets are successively by 6 frame roughing mills, after 7 passes of 8 frame intermediate mills, rolled piece is processed into band steel, after entering mm finishing mill unit 15H processing, centering enters 16H/V frame cutting sortie, only 0.1mm is differed because pre-cutting and slitting pass design middle two pitchs of holes, therefore rolled piece precise alignment in slitting pass of pre-cutting dog bone shape can be ensured, be rolled into three rolled pieces in parallel with 0.9mm ligament, the twolip slitting wheel of Cutting guide is exported again by being arranged on 16H/V, be divided into 3 independently rolled pieces, 3 rolled pieces enter separately 17H frame separately, the groove passage of 18H/V rolling mill, roll out the Ф 13mm Ribbed Bar that 3 size and dimensions are identical, enable equipment stable operation, improve 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.
Detailed description of the invention:
For summary of the invention of the present invention, Characteristic can be understood further, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
A cutting and rolling method for Ф 13mm screw-thread steel, adopt three-slitting rolling explained hereafter Ф 13mm American Standard screw-thread steel, have 18 rolling mills completely, horizontally and vertically alternative is arranged, 17 sorties come into operation.18 rolling mills be divided into roughing, in roll, finish rolling three units, wherein roughing mills has 6 rolling mills, and 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 mill, 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 production three cutting Ф 13 mm band rib reinforcement, 16H/V frame and 18H/V rolling mill form are horizontal.Roughing mills rolling 6 passages, pass adopts the pass identical with Ф 14mm screw-thread steel three-slitting rolling technique; Intermediate mill 8 passages, front 4 road passes adopt the pass shared with three-slitting rolling Ф 14mm screw-thread steel, just wherein some sortie gap values between rollers is adjusted, 12nd rolling mill sky crosses (the 6th passage), and the 5th passage and the 7th passage are plain-barreled rolls, and the elliptical rolled piece that 10 framves roll out enters two sorties and carries out grooveless rolling, reasonable distribution drafts, unrestricted spread, the size uniform that is middle and edge of the material type after twice flattening is stablized, for follow-up side pressure pass provides suitable material type.8th passage (14 framves are last rolling mill of intermediate mill) adopts side pressure pass as shown in Figure 1, every limit, sidewall of pass top radius of the radian R1=3.27mm, roll gap radius of the radian R2=5.5mm, pass notch inner width b=18.75mm, outer wide B=23.7mm, pass height H=47.3mm, roll gap S=6mm.Side pressure pass deflection is little, lengthening coefficient 1.07, supplied materials is processed into the band steel of the little 0.4-0.6mm of middle ratio two edge size, solves middle mm finishing mill unit distance, the problem that cutting 1,3 line temperature drop is larger than middle 2 lines; Solve during rolled piece distance of 56 meters long between middle mm finishing mill unit is advanced the problem reversed.Band steel depth-width ratio is 0.4, and for entering pre-slit pass smoothly, uniform distributing provides qualified material type.
Mm finishing mill unit first and 15H rolling mill pre-slit pass are as shown in Figure 2,1,3 line cylindrical angle of sides β=31.5 °, cylindrical slitting angle α=47.24 °, arc radius R1=8.67mm, pass height H=17.33mm, middle 2 string holes type slitting angle θ=42.16 °, arc diameter Ф=17.35mm, cutting sword height h=7.55mm, slitting angle radius of the radian R2=1.5mm, roll gap S=4mm, interstitial hole groove width B1=17.9mm, two side holes centre-to-centre spacing is B2=35.45mm, B3=36.45mm; The pre-cutting hole interstitial hole of mm finishing mill unit 15 frame is than two side holes height 0.02mm, both sides pass centre-to-centre spacing respectively reduces 0.5mm inwards, cylindrical slitting angle α differs 5 °, pass angle of wedge radian 1.5mm with middle 2 string holes type slitting angle θ, achieves the wear-resisting and even wearing of the pre-cutting hole angle of wedge; Three rolled piece material type distributed uniform, line difference is little; For cutting hole provides the rolled piece of proper height, allow it have certain drafts, in splitting rolling process, stock stability is good.
Mm finishing mill unit 16H/V is cutting sortie, adopt three lines contour, pass as shown in Figure 3,1,3 line cylindrical angle of sides β=35 °, cylindrical slitting angle α=31.58 °, arc radius R1=7.9mm, pass height H=15.8mm, both sides pass centre-to-centre spacing outwards respectively expands 0.25mm, this structure and pre-slit pass setted structure, pre-cutting two side holes type centre-to-centre spacing respectively reduces 0.5mm inwards, and object is that both sides rolled piece is received inwards, forms approximate contour uniform circular rolled piece; Middle 2 string holes type slitting angle θ=23.3 °, arc diameter Ф=15.8mm, interstitial hole centre-to-centre spacing increases 0.1mm than pre-slit pass, B1=18mm, B2=37mm, B3=37.5mm, slitting angle radius of the radian R2=0.9mm, roll gap S=0.9mm, object is the rolled piece of pre-slit pass out dog bone shape, centering enters slitting pass, and rolled piece is after middle pass is full of, and in the pass of both sides, rolled piece outwards spreads, prevent outside rolled piece earing, cause finished product to fold.Cutting sword spacing is identical with pass roll gap, is all 0.9mm, can stablize the critical condition successfully rolled piece being machined to three rolled pieces in parallel and being split out, and rolled piece is torn by twolip slitting wheel exactly that be conducive to milling train outlet Cutting guide.
In the present invention, adopt 150 square billets successively by 6 frame roughing mills, after 7 passes of 8 frame intermediate mills, rolled piece is processed into band steel, after entering the shape that mm finishing mill unit 15H is processed into as shown in Figure 2, centering enters 16H/V frame cutting sortie, only 0.1mm is differed because pre-cutting and slitting pass design middle two pitchs of holes, therefore rolled piece precise alignment in slitting pass of pre-cutting dog bone shape can be ensured, be rolled into as shown in Figure 3 with three rolled pieces in parallel of 0.9mm ligament, the twolip slitting wheel of Cutting guide is exported again by being arranged on 16H/V, be divided into 3 independently rolled pieces, 3 rolled pieces enter separately 17H frame separately, the groove passage of 18H/V rolling mill, roll out the Ф 13mm Ribbed Bar that 3 size and dimensions are 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 and still can modify to the detailed description of the invention of invention or portion of techniques feature be carried out to equivalent replacement; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the technology of request of the present invention protection.
Claims (5)
1. a cutting and rolling method for Ф 13mm screw-thread steel, comprises 18 rolling mills, horizontally and vertically alternative arrange, described 18 rolling mills be divided into roughing, in roll, finish rolling three units, wherein roughing mills has 6 rolling mills, and 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 mill, milling train is numbered 15H, 16H/V, 17H, 18H/V; Described roughing mills rolling 6 passages, pass adopts the pass identical with Ф 14mm screw-thread steel three-slitting rolling technique; Intermediate mill 8 passages, front 4 road passes adopt the pass shared with three-slitting rolling Ф 14mm screw-thread steel, it is characterized in that,
The empty mistake of 12nd rolling mill, the 11st rolling mill and the 13rd rolling mill are plain-barreled rolls, the 14th rolling mill sidewall of pass top every limit radius of the radian R1=3.27mm, roll gap radius of the radian R2=5.5mm, pass notch inner width b=18.75mm, outer wide B=23.7mm, pass height H=47.3mm, roll gap S=6mm;
Described mm finishing mill unit 15H rolling mill pre-slit pass 1,3 line cylindrical angle of sides β=31.5 °, cylindrical slitting angle α=47.24 °, arc radius R1=8.67mm, pass height H=17.33mm, middle 2 string holes type slitting angle θ=42.16 °, arc diameter Ф=17.35mm, cutting sword height h=7.55mm, slitting angle radius of the radian R2=1.5mm, roll gap S=4mm, interstitial hole groove width B1=17.9mm, two side holes centre-to-centre spacing is B2=35.45mm, B3=36.45mm;
Described mm finishing mill unit 16H/V is cutting sortie, adopt three lines contour, pass 1,3 line cylindrical angle of sides β=35 °, cylindrical slitting angle α=31.58 °, arc radius R1=7.9mm, pass height H=15.8mm, both sides pass centre-to-centre spacing outwards respectively expands 0.25mm, this structure and pre-slit pass setted structure, pre-cutting two side holes type centre-to-centre spacing respectively reduces 0.5mm inwards; Middle 2 string holes type slitting angle θ=23.3 °, arc diameter Ф=15.8mm, interstitial hole centre-to-centre spacing increases 0.1mm than pre-slit pass, B1=18mm, B2=37mm, B3=37.5mm, slitting angle radius of the radian R2=0.9mm, roll gap S=0.9mm, cutting sword spacing is identical with pass roll gap, is all 0.9mm.
2. the cutting and rolling method of Ф 13mm screw-thread steel according to claim 1, is characterized in that, described 16H/V frame and 18H/V rolling mill form are horizontal.
3. the cutting and rolling method of Ф 13mm screw-thread steel according to claim 1, is characterized in that, supplied materials is processed into the band steel of the little 0.4-0.6mm of middle ratio two edge size by described 14th rolling mill.
4. the cutting and rolling method of Ф 13mm screw-thread steel according to claim 3, is characterized in that, described band steel depth-width ratio is 0.4.
5. the cutting and rolling method of Ф 13mm screw-thread steel according to claim 1, it is characterized in that, the pre-cutting hole interstitial hole of described mm finishing mill unit 15H rolling mill is than two side holes height 0.02mm, both sides pass centre-to-centre spacing respectively reduces 0.5mm inwards, cylindrical slitting angle α differs 5 ° with middle 2 string holes type slitting angle θ, band steel is processed into three disjunctor rolled pieces in parallel.
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