CN101502845B - Corner rolling technique for bar material - Google Patents
Corner rolling technique for bar material Download PDFInfo
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- CN101502845B CN101502845B CN2009100107099A CN200910010709A CN101502845B CN 101502845 B CN101502845 B CN 101502845B CN 2009100107099 A CN2009100107099 A CN 2009100107099A CN 200910010709 A CN200910010709 A CN 200910010709A CN 101502845 B CN101502845 B CN 101502845B
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Abstract
A diagonal rolling bar technology is disclosed, comprising the steps of: heating a solid round blank to 1050-1190 DEG C via a heating furnace, de-scaling the heated blank with high-pressure water, removing iron scale on the surface of the steel blank, feeding the steel blank into a rolling mill for rolling which is disposed in single rack, double rack or multi rack longitudinal type; in the disposing manner of the single rack, the rolling mill is reversed upon the end of one-time rolling, the roll gap is unfolded to form a channel from which a rolled piece returns to an inlet end, and then the rolling mill is adjusted for the next roller, and above operations are repeated; in the disposing manner of the double rack, the second rolling mill serves as a finishing mill and rolls the rolled piece 1-2 times subsequent to rolling 1-3 times by the first rolling mill so as to form final size; in the disposing manner of the multi rack, after being rolled by the first rolling mill 1-3 times, the rolled piece is rolled by the rest rolling mills respectively and then cooled to room temperature. The invention is simple in arraying the mills, greatly lowered in investment of apparatuses, favor of rolling less-deformable steel and improved in biting conditions of the rolled piece.
Description
Technical field
This patent relates to a kind of hot rolling technology of metal, especially a kind of oblique milling new technology of bar.
Technical background
Existing rod material rolling process is axial rolling technology.Its blank is a square billet, and mill form is tandem rolling or semi-tandem rolling, also has to adopt cross-arranging type to arrange.No matter how it arranges, rollingly is in pass rolling, and rolled piece single pass lengthening coefficient is little, and rolling pass is a lot, and production efficiency is low.Because multi-pass is rolling, the frame of production-line arrangement is also many.Above problem seems more outstanding in large-scale bar rolling.
Summary of the invention
Low for solving rolling bar efficient, be out of shape uneven problem, the present invention proposes a kind of technique for bar material; This technology is blank with the circular solids base, and milling train adopts three-roll cross rolling mill, and milling train is arranged as the single chassis skew rolling mill or the two-shipper frame is arranged; Perhaps multimachine frame lap siding is arranged; As required, can also after oblique milling, arrange one three roller axial rolling sizing mill, various arrangements can be selected according to blank and trimmed size.This kind technology single pass mean coefficient of elongation 1.8-3, maximum can reach 4, the kind that compression ratio is less demanding, general 2-3 passage can be accomplished, even the kind that compression ratio is had relatively high expectations also can be accomplished in the 4-5 passage.
Because texturing machine is a three-roll cross rolling mill, three rolls of milling train are mutually 120 ° of layouts, and every roll not only has the roll surface angle, also has feed angle and rolling angle (or having only feed angle) simultaneously.Blank is distortion under the effect of three rolls, rolled piece three dimension stress power, and the roll-force that three rolls apply is mutually 120 °, makes rolled piece stressed evenly, and is stable rolling in the deformed area.Owing to adopted the oblique milling mode; The oblique milling deformed area can be considered the tandem rolling form of axial rolling; Rolling each passage in skew rolling mill all be equivalent to the multimachine frame continuous rolling process of axial rolling, and depressing of every time is uniform; Blank integral body all can obtain processing, does not have the problem that the roll gap place can not get processing in every time process in the axial rolling process.
The technical scheme that adopts is:
A kind of corner rolling technique for bar material, its characteristic comprises following process:
The filled circles base is heated to 1050-1190 ℃ through heating furnace, and the blank after the heating removes the iron scale of billet surface through high-pressure water descaling, gets into mill milling then, and milling train adopts three-roll cross rolling mill, and milling train is arranged and adopted unit posture two-shipper posture multimachine frame lap siding.When adopting the single chassis arrangement form, after the rolling end of a time, the milling train counter-rotating, roller gap opens; Form passage, rolled piece returns arrival end from the passage of milling train, milling train adjustment then; Following a time is rolling, so back and forth, finally rolls out the specification that needs; When adopting the two-shipper frame to arrange, second as finishing mill, and after the rolling 1-3 passage of first rolling mill, second rolling mill system 1-2 passage of rerolling rolls into final size; When adopting the multimachine frame to arrange, the rolling 1-3 passage of first rolling mill, follow-up milling train is each rolling a time respectively, rolls into final size.Utilize cutting equipment to cut into scale to the finished product bar then, be cooled to room temperature again, through putting in storage after the assay was approved.
Above-mentioned filled circles base can get into one three roller axial rolling and decide machine after rolling oblique milling, and it is carried out the correction of size and dimension.
Three rolls of above-mentioned three-roll cross rolling mill are mutually hexagonal angle and arrange that roll also has rolling angle and feed angle (or having only feed angle) simultaneously except that having the roll surface angle, and three rolls are formed the blind bore type, make rolled piece stable rolling in pass.
The process of oblique milling bar of the present invention has following characteristics:
1, the machine row are formed simply, and equipment investment significantly reduces.
2, machine row production capacity is big, and when producing big bar, unit row production capacity can reach 6,000,000 tons.
3, operation of rolling distortion is even, and structure property is good.
4, be beneficial to rolling less-deformable steel kind.
5, this process using circular solids base is a raw material.
6, adopt three-roll cross rolling mill, improved the bite condition of rolled piece.
The specific embodiment
Embodiment one
Milling train is provided with a three-roll cross rolling mill in this technology, adopts back and forth rolling mode of single chassis, and its idiographic flow is: the filled circles base is heated to 1050-1190 ℃ (actual temp is confirmed with the steel grade of heating) through heating furnace; Blank after the heating removes the iron scale of billet surface through high-pressure water descaling, gets into mill milling then; After the rolling end of a time; The milling train counter-rotating, roller gap opens, and forms passage.Rolled piece returns arrival end from the passage of milling train, milling train adjustment then, and following a time is rolling.So back and forth, finally roll out the specification that needs.Utilize cutting equipment then, cut into scale to the finished product bar, be cooled to room temperature, check warehousing after passing to cold bed.
Embodiment two
Milling train is provided with three three-roll cross rolling mills and adds one three roller axial rolling sizing mill in this technology, and this four rolling mill adopts lap siding to arrange that its idiographic flow is: the filled circles base is heated to 1050-1190 ℃ (actual temp is confirmed with the steel grade of heating) through heating furnace; Blank after the heating is through high-pressure water descaling; Remove the iron scale of billet surface, it is rolling once to get into three skew rolling mills then, through three skew rolling mills rolling after; Workpiece measurement is near finished size; Get into three roller axial rolling sizing mills then, rolled piece is carried out the correction of size and dimension, obtain accurate dimensions and shape at last.Rolled piece returns arrival end from the passage of milling train, milling train adjustment then, and following a time is rolling.So back and forth, finally roll out the specification that needs.Utilize cutting equipment then, cut into scale to the finished product bar, be cooled to room temperature, check warehousing after passing to cold bed.
Embodiment three
Milling train is provided with two three-roll cross rolling mills in this technology, and its idiographic flow is: the filled circles base is heated to 1050-1190 ℃ (actual temp is confirmed with the steel grade of heating) through heating furnace, and the blank after the heating is through high-pressure water descaling; Remove the iron scale of billet surface; Get into mill milling then, after the rolling end of a time, the milling train counter-rotating; Roller gap opens, and forms passage.Rolled piece returns arrival end from the passage of milling train, milling train adjustment then, and following a time is rolling.Rolling 2 passages on first rolling mill get into second rolling mill then and are rolled, and pass through the rolling of a time, roll out final size.Utilize cutting equipment then, cut into scale to the finished product bar, be cooled to room temperature, check warehousing after passing to cold bed.
Claims (3)
1. corner rolling technique for bar material, it is characterized in that technical process is: the filled circles base is heated to 1050-1190 ℃ through heating furnace, and the blank after the heating removes the iron scale of billet surface through high-pressure water descaling; Get into mill milling then, milling train adopts three-roll cross rolling mill, and milling train is arranged and adopted single chassis, two-shipper frame or multimachine frame lap siding, during with the single chassis arrangement form; After the rolling end of a time, the milling train counter-rotating, roller gap opens; Form passage, rolled piece returns arrival end from the passage of milling train, milling train adjustment then; Following a time is rolling, so back and forth, finally rolls out the specification that needs; When adopting the two-shipper frame to arrange, second as finishing mill, and after the rolling 1-3 passage of first rolling mill, second rolling mill system 1-2 passage of rerolling rolls into final size; When adopting the multimachine frame to arrange, the rolling 1-3 passage of first rolling mill, follow-up milling train is each rolling a time respectively, rolls into final size, utilizes cutting equipment to cut into scale to the finished product bar then, is cooled to room temperature again, through putting in storage after the assay was approved.
2. a kind of corner rolling technique for bar material according to claim 1 is characterized in that described filled circles base after three-roll cross rolling mill is rolling, can get into one three roller axial rolling sizing mill, and it is carried out the correction of size and dimension.
3. a kind of corner rolling technique for bar material according to claim 1; Three rolls that it is characterized in that described three-roll cross rolling mill are mutually the hexagonal angle layout; Roll is except that having the roll surface angle; Also have rolling angle and feed angle simultaneously or have only feed angle, three rolls are formed the blind bore type, make rolled piece stable rolling in pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100107099A CN101502845B (en) | 2009-03-17 | 2009-03-17 | Corner rolling technique for bar material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100107099A CN101502845B (en) | 2009-03-17 | 2009-03-17 | Corner rolling technique for bar material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101502845A CN101502845A (en) | 2009-08-12 |
| CN101502845B true CN101502845B (en) | 2012-01-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100107099A Expired - Fee Related CN101502845B (en) | 2009-03-17 | 2009-03-17 | Corner rolling technique for bar material |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103203359B (en) * | 2012-01-13 | 2015-04-01 | 宝山钢铁股份有限公司 | Rolling method for improving bite conditions of reversible mill |
| CN104174652A (en) * | 2014-07-16 | 2014-12-03 | 洛阳鼎锐材料科技有限公司 | Equipment and technology for piercing and rolling anchor rod integrally |
| CN108480397B (en) * | 2018-03-01 | 2020-06-02 | 西安建筑科技大学 | Equidistant spiral rolling method for large-size 45-steel ultrafine-grained bar |
| CN108453130B (en) * | 2018-03-01 | 2019-09-13 | 西安东耘新金属材料有限公司 | The roll spacings milling method such as helical tapered roll of large-sized aluminium alloy ultra fine grained steel bar |
| CN108405607B (en) * | 2018-03-01 | 2019-09-13 | 西安东耘新金属材料有限公司 | A kind of isometric helix milling method of large-sized aluminium alloy ultra fine grained steel bar |
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