CN113828634A - 18mm and 20mm rolled ribbed steel bar 2-line segmentation universal hole pattern production method - Google Patents
18mm and 20mm rolled ribbed steel bar 2-line segmentation universal hole pattern production method Download PDFInfo
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- CN113828634A CN113828634A CN202111059591.6A CN202111059591A CN113828634A CN 113828634 A CN113828634 A CN 113828634A CN 202111059591 A CN202111059591 A CN 202111059591A CN 113828634 A CN113828634 A CN 113828634A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 31
- 239000010959 steel Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 230000011218 segmentation Effects 0.000 title claims abstract description 7
- 238000005096 rolling process Methods 0.000 claims abstract description 130
- 238000005520 cutting process Methods 0.000 abstract description 3
- 238000011112 process operation Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/16—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling wire rods, bars, merchant bars, rounds wire or material of like small cross-section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B27/00—Rolls, roll alloys or roll fabrication; Lubricating, cooling or heating rolls while in use
- B21B27/02—Shape or construction of rolls
- B21B27/024—Rolls for bars, rods, rounds, tubes, wire or the like
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Abstract
The invention discloses a production method of a 18mm and 20mm rolled ribbed steel bar 2-line segmentation universal hole pattern, which comprises 3 units of rough rolling, medium rolling and finish rolling, wherein 6 rolling mills of the rough rolling unit are numbered as 1H, 2V, 3H, 4V, 5H and 6V; 4 rolling mills of the middle rolling mill group are numbered as 7H, 8V, 9H and 10V; 8 rolling mills of the finishing train are numbered 11H, 12V, 13H, 14H, 15H, 16H, 17H, 18H. The rough rolling pass adopts a pass which is universal for rolling in various specifications; the middle rolling unit adopts a hole pattern system of 'flat roll + vertical rolling + flat roll + vertical rolling'; the finishing mill group adopts a hole type system of 'first precutting + vertical rolling + second precutting + cutting + ellipse + round hole + ellipse + finished hole', wherein the cutting hole is arranged on a 14H rolling mill, and then hot-rolled ribbed steel bars with phi 22mm or phi 25mm are rolled through the last 4 passes. The invention is used for solving the problem that the replacement of the rolling mill influences the process operation time when the specification is changed in the 2-line slitting production process, reducing the turning amount of the roller processing and reducing the reserve amount of the roller.
Description
Technical Field
The invention relates to a production process of hot-rolled ribbed steel bars, in particular to a production method of a 18mm and 20mm rolled ribbed steel bar 2-line segmentation universal hole pattern.
Background
In order to improve the production capacity of hot-rolled ribbed steel bars and reduce the production energy consumption, most manufacturers with the diameter of 12 mm-25 mm adopt a splitting rolling process technology, wherein the hot-rolled ribbed steel bars with the diameter of 12mm adopt a 4-wire or 5-wire splitting rolling technology, the hot-rolled ribbed steel bars with the diameter of 14mm adopt a 4-wire splitting rolling technology, the hot-rolled ribbed steel bars with the diameter of 16mm adopt a 3-wire splitting rolling technology, and the hot-rolled ribbed steel bars with the diameter of 18 mm-25 mm adopt a 2-wire splitting rolling technology. In the 2-line splitting rolling process route and process design, except that all rough rolling passes are general and the middle rolling part passes are general, each specification adopts different process routes and pass parameters from middle rolling, when the specification is changed, all rolling mills with different pass parameters need to be changed, the process operation time is long, the operation rate of the rolling mills is influenced, and meanwhile, the reserve quantity of the rollers is large.
Disclosure of Invention
The invention aims to: the method for producing the universal hole pattern by 2-line splitting of the 18mm and 20mm rolled ribbed steel bar has the advantages that except for the fact that the hole pattern parameters of a finished product hole (K1), a finished product front hole (K2) and a K3 hole roller are different, the parameters of other hole patterns are completely the same, so that the technical influence caused by more frame replacement when the production specifications of phi 18mm and phi 20mm hot rolled ribbed steel bars are changed is solved, and the roller reserve and the roller groove turning amount are reduced.
In order to achieve the purpose, the invention adopts the following technical scheme:
a18 mm, 20mm roll 2 line of ribbed steel bar and cut the general pass production method, there are 18 rolling mills in the whole line, divide into rough rolling, middle rolling and finish rolling 3 units, 6 rolling mills of the said rough rolling unit, adopt "level-stand" to arrange alternatively, number 1H, 2V, 3H, 4V, 5H, 6V; 6 rolling mills of the middle rolling mill group adopt 'horizontal-vertical' alternative arrangement, and the serial numbers are 7H, 8V, 9H and 10V; 8 rolling mills of the finishing mill group adopt 'flat-vertical flat-flat' arrangement, and the numbers are 11H, 12V, 13H, 14H, 15H, 16H, 17H and 18H; the rough rolling pass adopts a pass which is universal for rolling in various specifications; the middle rolling adopts a hole pattern system of 'flat roll-vertical rolling-flat roll-vertical rolling'; the finish rolling adopts a hole type system of 'first precutting + vertical rolling + second precutting + splitting + ellipse + round hole + ellipse + finished hole', the splitting holes are arranged on a 14H rolling mill, the parallel rolled pieces rolled through the splitting holes are divided into 2 independent rolled pieces through a splitting wheel arranged at the outlet of the rolling mill, and the two rolled pieces are rolled for 4 times through a 15H elliptical hole, a 16H round hole, a 17H elliptical hole and an 18H finished hole to produce hot-rolled ribbed steel bars with phi 18mm or phi 20 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the hole pattern of the middle rolling 7H rolling mill is a flat roll, the roll gap of the flat roll is 47mm, and the hole pattern of the middle rolling 9H rolling mill is a flat roll, the roll gap of the flat roll is 38 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the middle-rolling 8V vertical rolling hole has the groove height of 78mm, the groove bottom width of 49.5mm, the notch width of 53.5mm, the fillet radius of 15mm, the fillet radius of 10mm and the roll gap of 16 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the groove of the middle-rolling 10V rolling mill is a vertical rolling hole, the height of the groove is 60mm, the width of the groove bottom of the groove is 38mm, the width of the notch is 42mm, the radius of an inner fillet is 13mm, the radius of an outer fillet is 6mm, and the roll gap is 10 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: and (3) finish rolling the first pre-cut hole of the 11H, wherein the hole shape is dumbbell-shaped, the hole width is 62mm, the height is 36mm, the middle included angle is 600, the inclination of the hole side wall is 200, the radius of an inner arc is 13mm, the radius of an outer arc is 5mm, and the roll gap is 5 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the finish rolling of 12V is vertical rolling hole, the height of the hole pattern is 34mm, the width of the bottom of the hole pattern groove is 38mm, the opening degree of the hole pattern groove is 59mm, the internal fillet is 14mm, the external fillet is 6mm, and the roll gap is 10 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: and (3) finish rolling 13H is a second precut hole, the hole shape is dumbbell-shaped, the width of the hole shape is 65.57mm, the height of the hole shape is 35.6mm, the middle included angle is 540, the inclination of the side wall of the hole shape is 250, the radius of the inner fillet is 14mm, the outer fillet is 4mm, and the roll gap is 4 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the finish rolling 14H is a splitting hole, the width of the hole is 68.55mm, the height is 33mm, the middle included angle is 580, the radius of the arc of the wedge tip is 0.75mm, and the roll gap is 1 mm.
On the basis of the above scheme and as a preferable scheme of the scheme: the finish rolling 15H is an elliptical hole, the width of the bottom of the groove is 34mm, the height of the groove is 16mm, the radius of an elliptical arc is 20mm, and the roll gap is 2 mm.
The invention has the beneficial effects that:
the invention provides a production method of a universal hole pattern for 2-line segmentation of 18mm and 20mm rolled ribbed steel bars, which adopts a universal hole pattern system to solve the problems of long replacement time of a rolling mill and large reserve of rollers caused by different process routes and different hole pattern parameters when two specifications are replaced, and reduces the process influence time. Except that the parameters of the finished product hole (K1), the finished product front hole (K2) and the K3 hole roller pass are different, the parameters of other passes are completely the same, so that the problem of process influence caused by more frame replacement when the production specifications of phi 18mm and phi 20mm hot-rolled ribbed steel bars are changed is solved, and the roller reserve and the roller groove turning amount are reduced.
Drawings
FIG. 1 is a schematic view of a flat roll of the present invention;
FIG. 2 is a schematic view of a vertical rolling hole of the present invention;
FIG. 3 is a schematic view of a pre-cut hole of the present invention;
FIG. 4 is a schematic view of a dicing aperture of the present invention;
FIG. 5 is a schematic view of an elliptical hole of the present invention;
FIG. 6 is a schematic view of a circular hole of the present invention;
fig. 7 is a schematic view of a finished hole of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-7, a 18mm and 20mm rolled ribbed steel bar 2-line segmentation universal hole pattern production method is used for producing phi 18mm or phi 20mm hot rolled ribbed steel bars, the whole line has 18 rolling mills, and the production method is divided into 3 units, wherein 6 rolling mills of a roughing mill set adopt 'flat-vertical' alternative arrangement, and the serial numbers are 1H, 2V, 3H, 4V, 5H and 6V; 4 rolling mills of the middle rolling mill group adopt 'horizontal-vertical' alternative arrangement, and the numbers are 7H, 8V, 9H and 10V; 8 rolling mills of the finishing mill group adopt 'flat-vertical-flat' arrangement, and the numbers are 11H, 12V, 13H, 14H, 15H, 16H, 17H and 18H. The rough rolling pass adopts a pass which is universal for rolling in various specifications; the middle rolling adopts a hole type system of 'flat roll-vertical rolling edge control-flat roll-vertical rolling edge control', the schematic diagram of the flat roll is shown in figure 1, and the vertical rolling edge control hole is shown in figure 2; finish rolling the first frame 11H using the first pre-cut hole as shown in fig. 3; the edge control hole of fig. 2 is adopted for 12H, the second precut hole of fig. 3 is adopted for 13H, the cutting hole of fig. 4 is adopted for 14H, the elliptical hole of fig. 5 is adopted for 15H, the circular hole of different parameters of fig. 6 is adopted for 16H, the elliptical hole of different parameters of fig. 5 is adopted for 17H, and the finished hole of different parameters of fig. 7 is adopted for 18H. The parallel rolled pieces rolled through the 14H splitting holes are divided into 2 independent rolled pieces through a splitting wheel arranged at the outlet of the rolling mill, the rolled pieces are rolled into elliptical rolled pieces through a 15H rolling mill, the elliptical rolled pieces are rolled into different circular rolled pieces through a 16H rolling mill, different elliptical rolled pieces are rolled through a 17H rolling mill, and finally hot rolled ribbed steel bars with the diameter of 18mm or 20mm are rolled through an 18H rolling mill.
Specifically, as shown in FIG. 1, the hole pattern of the medium rolling 7H rolling mill is a flat roll, and the roll gap is 47 mm. The middle rolling 9H hole pattern is a flat roll, and the roll gap is 38 mm.
The middle-rolling 8V vertical rolling hole is shown in figure 2, the hole type height L is 78mm, the hole type groove bottom width H1 is 49.5mm, the notch width H is 53.5mm, the fillet radius is R15mm, the fillet radius is R10mm, and the roll gap S is 16 mm.
The hole pattern of the medium-rolling 10V rolling mill is a vertical rolling hole: the height of the groove is 60mm, the width of the groove bottom of the groove is 38mm, the width of the notch is 42mm, the radius of the inner fillet is 13mm, the radius of the outer fillet is 6mm, and the roll gap is 10 mm.
Finish rolling 11H the first pre-cut hole, as shown in FIG. 3, the hole pattern is dumbbell shaped, the width L of the hole pattern is 62mm, the height H is 36mm, and the intermediate angle is 60%0The inclination of the hole-type side wall is 200The radius of the inner arc is 13mm, the external fillet is 5mm, and the roll gap S is 5 mm.
The finish rolling of 12V was carried out in a vertical rolling pass, similarly as shown in FIG. 2, with a pass height L of 34mm, a pass groove bottom width H1 of 38mm, a pass groove opening degree H of 59mm, an inner fillet of 14mm, an outer fillet of 6mm, and a roll gap S of 10 mm.
Finish rolling 13H is a second pre-cut hole, also see FIG. 3, the hole pattern is dumbbell shaped, the width L of the hole pattern is 65.57mm, the height H is 35.6mm, and the intermediate angle is 540The inclination of the hole-type side wall is 250The radius of the fillet is 14mm, the external fillet is 4mm, and the roll gap S is 4 mm.
Finish rolling 14H is a slit hole, as shown in FIG. 4, the width L of the hole is 68.55mm, the height H is 33mm, and the intermediate angle is 58 mm0The radius of the arc of the wedge tip is 0.75mm, and the roll gap S is 1 mm.
The finish rolling 15H is an elliptical hole, and as shown in FIG. 5, the width L of the groove bottom of the rolling groove is 34mm, the height H is 16mm, the radius of an elliptical arc is 20mm, and the roll gap is 2 mm.
Furthermore, the upper pass is a 2-line splitting universal pass for rolling phi 18mm and phi 20mm hot-rolled ribbed steel bars. As shown in FIG. 6, 16H of the finish rolling in the production of hot rolled ribbed steel bar with a diameter of 18mm is a circular hole, the width L of the hole pattern is 21.36mm, the height H of the hole pattern is 20mm, and the included angle of tangent lines of the circle is 300The roll gap S was 3 mm. Finish rolling 17H was an oval hole, and referring also to FIG. 6, the hole pattern width L was 31mm, the height H was 13mm, the oval radius was 21.5mm, and the roll gap S was 3 mm. Finish rolling 18H is finished holes, and as shown in FIG. 7, the width L of the hole pattern is 17mm, the height H is 17.12mm, and the roll gap S is 2 mm. 16H in the production and finish rolling of the phi 20mm hot-rolled ribbed steel bar is a round hole, the width of the hole pattern is 25.98mm, the height of the hole pattern is 25mm, and the included angle of tangent lines of the circle is 300The roll gap is 5 mm. And (4) finish rolling 17H is an elliptical hole, the width of the hole pattern is 34mm, the height of the hole pattern is 16mm, the radius of the ellipse is 20mm, and the roll gap is 2 mm. And finish rolling 18H to obtain a finished hole, wherein the width of the hole pattern is 18.93mm, the height of the hole pattern is 19.04mm, and the roll gap is 2 mm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A18 mm, 20mm roll 2 line segmentation universal hole pattern production method of ribbed steel bar, the whole line has 18 rolling mills altogether, divide into rough rolling, middle rolling and finish rolling 3 units, characterized by that: the 6 rolling mills of the roughing mill group adopt 'horizontal-vertical' alternative arrangement, and are numbered as 1H, 2V, 3H, 4V, 5H and 6V; 6 rolling mills of the middle rolling mill group adopt 'horizontal-vertical' alternative arrangement, and the serial numbers are 7H, 8V, 9H and 10V; 8 rolling mills of the finishing mill group adopt 'flat-vertical flat-flat' arrangement, and the numbers are 11H, 12V, 13H, 14H, 15H, 16H, 17H and 18H; the rough rolling pass adopts a pass which is universal for rolling in various specifications; the middle rolling adopts a hole pattern system of 'flat roll-vertical rolling-flat roll-vertical rolling'; the finish rolling adopts a hole type system of 'first precutting + vertical rolling + second precutting + splitting + ellipse + round hole + ellipse + finished hole', the splitting holes are arranged on a 14H rolling mill, the parallel rolled pieces rolled through the splitting holes are divided into 2 independent rolled pieces through a splitting wheel arranged at the outlet of the rolling mill, and the two rolled pieces are rolled for 4 times through a 15H elliptical hole, a 16H round hole, a 17H elliptical hole and an 18H finished hole to produce hot-rolled ribbed steel bars with phi 18mm or phi 20 mm.
2. The 18mm and 20mm ribbed steel bar 2 line splitting universal hole pattern production method according to claim 1, wherein the hole pattern of the medium rolling 7H rolling mill is a flat roll, the roll gap of the flat roll is 47mm, and the hole pattern of the medium rolling 9H rolling mill is a flat roll, the roll gap of the flat roll is 38 mm.
3. The production method of the 18mm and 20mm rolled ribbed steel bar 2 line splitting universal hole type according to claim 1, wherein 8V vertical rolled holes are subjected to medium rolling: the height of the groove is 78mm, the width of the groove bottom of the groove is 49.5mm, the width of the notch is 53.5mm, the radius of the inner fillet is 15mm, the radius of the outer fillet is 10mm, and the roll gap is 16 mm.
4. The 18mm and 20mm production method of 2-line slitting universal groove for rolled ribbed steel bar according to claim 1, wherein the groove of the middle rolling 10V rolling mill is a vertical rolling groove, the groove height of the groove is 60mm, the groove bottom width of the groove is 38mm, the groove opening width is 42mm, the inner corner radius is 13mm, the outer corner radius is 6mm, and the roll gap is 10 mm.
5. The production method of the 18mm and 20mm rolled ribbed steel bar 2 line splitting universal hole pattern according to claim 1, wherein a first pre-cut hole of a finish rolling 11H is in a dumbbell shape, the width of the hole pattern is 62mm, the height of the hole pattern is 36mm, and the intermediate included angle is 60mm0The inclination of the hole-type side wall is 200The radius of the inner arc is 13mm, the external fillet is 5mm, and the roll gap is 5 mm.
6. The production method of the 18mm and 20mm rolled ribbed steel bar 2 line split universal pass according to claim 1, wherein the finish rolling 12V is a vertical rolling pass, the pass height is 34mm, the pass groove bottom width is 38mm, the pass groove opening degree is 59mm, the internal fillet is 14mm, the external fillet is 6mm, and the roll gap is 10 mm.
7. The production method of the 18mm and 20mm rolled ribbed bar 2 line splitting universal hole pattern according to claim 1, wherein the finish rolling 13H is a second pre-cut hole, the shape of the hole pattern is dumbbell-shaped, the width of the hole pattern is 65.57mm, the height of the hole pattern is 35.6mm, and the intermediate included angle is 54 degrees0The inclination of the hole-type side wall is 250The radius of the fillet is 14mm, the external fillet is 4mm, and the roll gap is 4 mm.
8. The method for producing the 18mm and 20mm rolled ribbed bar 2 line split universal groove according to claim 1, wherein the finish rolling 14H is a split hole, the groove width is 68.55mm, the height is 33mm, and the intermediate included angle is 580The radius of the arc of the wedge tip is 0.75mm, and the roll gap is 1 mm.
9. The production method of the 18mm and 20mm rolled ribbed steel bar 2 line splitting universal hole type according to claim 1, wherein the finish rolling 15H is an elliptical hole, the width of the bottom of the groove is 34mm, the height is 16mm, the radius of an elliptical arc is 20mm, and the roll gap is 2 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111059591.6A CN113828634B (en) | 2021-09-10 | 2021-09-10 | 2-line slitting universal hole type production method for 18mm and 20mm rolled ribbed steel bars |
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| CN202111059591.6A CN113828634B (en) | 2021-09-10 | 2021-09-10 | 2-line slitting universal hole type production method for 18mm and 20mm rolled ribbed steel bars |
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| CN113828634B CN113828634B (en) | 2024-04-12 |
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Cited By (3)
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| CN114515756A (en) * | 2021-12-27 | 2022-05-20 | 石横特钢集团有限公司 | Hot rolling process and device for reinforcing steel bars of threaded rib anchor rods |
| CN114789195A (en) * | 2022-03-31 | 2022-07-26 | 中天钢铁集团(南通)有限公司 | Novel slitting rolling process |
| CN115069766A (en) * | 2022-07-06 | 2022-09-20 | 山东钢铁集团永锋临港有限公司 | Hole pattern system for producing phi 18mm hot-rolled ribbed steel bars through four-slitting rolling |
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| CN114515756A (en) * | 2021-12-27 | 2022-05-20 | 石横特钢集团有限公司 | Hot rolling process and device for reinforcing steel bars of threaded rib anchor rods |
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| CN113828634B (en) | 2024-04-12 |
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