CN113941598A - Five-slitting rolling process for phi 12mm steel bar - Google Patents
Five-slitting rolling process for phi 12mm steel bar Download PDFInfo
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- CN113941598A CN113941598A CN202111206000.3A CN202111206000A CN113941598A CN 113941598 A CN113941598 A CN 113941598A CN 202111206000 A CN202111206000 A CN 202111206000A CN 113941598 A CN113941598 A CN 113941598A
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- 238000005096 rolling process Methods 0.000 title claims abstract description 53
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 33
- 239000010959 steel Substances 0.000 title claims abstract description 33
- 239000013072 incoming material Substances 0.000 claims abstract description 12
- 238000005520 cutting process Methods 0.000 claims description 33
- 238000000034 method Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 abstract description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 238000005299 abrasion Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000000881 depressing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000010009 beating Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
-
- 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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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
- B21B2015/0021—Cutting or shearing the product in the rolling direction
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Abstract
The invention discloses a five-slitting rolling process of a phi 12mm steel bar, wherein incoming materials are processed by a pass system, the pass system comprises a K7 incoming material round hole, a K6 horizontal through hole, a K5 vertical box-shaped hole, a K4 pre-slitting hole, a K3 slitting hole, a K2 elliptical hole and a K1 finished product hole which are sequentially arranged, five holes are respectively arranged in the K4 pre-slitting hole, the K3 slitting hole, the K2 elliptical hole and the K1 finished product hole, and an outlet of the K3 slitting hole is used for slitting two outermost rolled pieces first and then three middle rolled pieces. The five-slitting rolling process for the phi 12mm steel bars effectively improves the slitting rolling quality, ensures that rolled pieces can be stably and accurately separated, avoids the conditions of wave bending, cold bed steel disorder, flying shear steel stacking and the like, and improves the production quality of products.
Description
Technical Field
The invention relates to the technical field of multi-line slitting rolling, in particular to a five-slitting rolling process for phi 12mm steel bars.
Background
The splitting rolling is a process that in the rolling process, a billet is rolled into two or more parallel parts with the same section shape through hole pattern design, then the billet is longitudinally split into two or more rolled pieces with the same section shape through splitting equipment, and the rolling is continued until a finished product is obtained. The splitting rolling process can effectively improve the operation rate and greatly improve the yield, but the sizes of all rolled pieces cannot be completely consistent under the influence of factors such as steel temperature fluctuation, rolling groove abrasion, hole pattern system design, guide installation, rolling groove processing precision and the like.
Disclosure of Invention
The invention aims to solve the technical problems and provide a technical task for improving the prior art, provides a five-slitting rolling process for phi 12mm steel bars, and solves the problems that the five-slitting rolling process for phi 12mm steel bars in the prior art is easy to generate wave bending, cold bed steel disorder, flying shear steel stacking and the like.
In order to solve the technical problems, the technical scheme of the invention is as follows:
a five-splitting rolling process for a phi 12mm steel bar is characterized in that incoming materials are processed by a pass system, the pass system comprises a K7 incoming material round hole, a K6 horizontal through hole, a K5 vertical box-type hole, a K4 pre-splitting hole, a K3 splitting hole, a K2 elliptical hole and a K1 finished product hole which are sequentially arranged, five holes are formed in the K4 pre-splitting hole, the K3 splitting hole, the K2 elliptical hole and the K1 finished product hole, and an outlet of the K3 splitting hole is used for splitting two outermost rolled pieces first and then splitting three middle rolled pieces.
And further, splitting the rolled piece by adopting a splitting wheel method.
Furthermore, a front splitting wheel assembly and a rear splitting wheel assembly are arranged at the outlet of the K3 splitting hole at intervals along the traveling direction of the rolled pieces, the front splitting wheel assembly splits two rolled pieces on the outermost side, and the rear splitting wheel assembly splits three rolled pieces in the middle.
Furthermore, the wedge angle of the cutting edges of the front cutting wheel assembly ranges from 55 degrees to 60 degrees, the center distance of the two cutting edges ranges from 31.2 mm to 33.2mm, and the width of the wedge top ranges from 1.6 mm to 2.2 mm.
Further, the wedge angle of the blade of the rear cutting wheel assembly is 80 degrees, and the width of the wedge top is 0.8 mm.
Further, the distance between the front slitting wheel assembly and the rear slitting wheel assembly in the travelling direction of the rolled piece is 100 mm.
Furthermore, the center distance between adjacent hole patterns in the middle of the K4 pre-cutting hole is 15.2mm, the center distance between two hole patterns on the most edge side is 61mm, the wedge angle is 85-87 degrees, the arc radius of the wedge top is 1.5-1.8 mm, the distance between the upper wedge top and the lower wedge top is 6.8mm, and the radius of the groove bottom is 6.6 mm.
Furthermore, the center distance between adjacent hole patterns in the middle of the K3 cutting hole is 15.4mm, the center distance between two hole patterns on the most lateral side is 61.8mm, the wedge angle is 55-60 degrees, the arc radius of the wedge top is 0.6-0.7 mm, the distance between the upper wedge top and the lower wedge top is 0.7-0.9 mm, the height of the groove bottom is 14.13mm, and the radius of the groove bottom is 6.8 mm.
Furthermore, double-row four-wheel rolling guides and guards are arranged at an inlet of the K4 pre-splitting hole, the guide wheels are designed to be V-shaped, a box-type outlet is arranged at an outlet of the K4 pre-splitting hole, the size of an inner cavity of the K4 pre-splitting hole is 5-10 mm larger than that of a rolled piece, and the length of the inner cavity is 540 mm.
Furthermore, the coefficient of extension of the K4 pre-cut holes is 1.25-1.32, and the coefficient of extension of the K3 pre-cut holes is 1.10-1.25.
Compared with the prior art, the invention has the advantages that:
the five-slitting rolling process for the phi 12mm steel bars effectively improves the slitting rolling quality, ensures that rolled pieces can be stably and accurately separated, avoids the conditions of wave bending, cold bed steel disorder, flying shear steel stacking and the like, and improves the production quality of products.
Drawings
FIG. 1 is a schematic structural diagram of a five-slit pass system of a steel bar with a diameter of 12 mm.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, 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. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The five-slitting rolling process for the phi 12mm steel bar disclosed by the embodiment of the invention improves the quality during slitting, reduces the generation of faults such as wave bending, cold bed steel disorder, flying shear steel stacking and the like, and improves the quality of a finished product.
As shown in figure 1, a five-slitting rolling process for a steel bar with the diameter of 12mm mainly comprises the steps of rolling a rolled piece into five parallel rolled pieces by using the effect of pass in the hot rolling process, longitudinally slitting the parallel rolled pieces into five single rolled pieces by using slitting equipment (a roller, a guide, a slitting wheel and the like), and then rolling into a finished steel product or an intermediate blank.
The reasonability of the distribution of the process parameters of each pass is considered, the load is balanced, the nonuniformity of the wear of the hole patterns is reduced as much as possible, the aims of minimum roll changing times, high rolling mill yield and smooth production are achieved, the gap of a transmission screw rod of the guide in the transverse moving process is eliminated, the material shape of each pass is controlled according to the process requirements, and the guide gap is adjusted by using a sample rod according to the requirements.
The method specifically comprises the steps that incoming materials are processed through a hole pattern system, the hole pattern system comprises a K7 incoming material round hole, a K6 horizontal through hole, a K5 vertical box-shaped hole, a K4 pre-splitting hole, a K3 splitting hole, a K2 elliptical hole and a K1 finished product hole which are sequentially arranged, the incoming materials are sequentially processed through the rolling passes, the K4 pre-splitting hole, the K3 splitting hole, the K2 elliptical hole and the K1 finished product hole are all provided with five holes, in the embodiment, a splitting wheel method is adopted for splitting rolled pieces, an outlet of the K3 splitting hole is firstly split into two rolled pieces on the outermost side, then three rolled pieces in the middle are split, namely, five rolled pieces are split through two steps, and then five rolled pieces are respectively split into finished rolled pieces through the K2 elliptical hole and the K1 finished product hole.
Compared with the prior art, the method has the advantages that only one rolling pass K6 horizontal through hole is arranged between the K7 incoming material round hole and the K5 vertical box-shaped hole under the condition of adopting a raw material with a larger section or the section of the same raw material, so that the rolling passes are reduced, the area of a newly-built or reconstructed plant can be reduced, the equipment investment is reduced, the number of passes is small when a rolled piece with the same section is cut, the temperature drop is small, the deformation work is small, and the consumed electric energy is greatly reduced. The temperature drop is small, the initial rolling temperature can be reduced, and the fuel is saved.
Specifically, a front splitting wheel assembly and a rear splitting wheel assembly are arranged at the outlet of the K3 splitting hole at intervals along the traveling direction of the rolled pieces, the front splitting wheel assembly splits two rolled pieces on the outermost side, and the rear splitting wheel assembly splits three rolled pieces in the middle; the wedge angle of the cutting edges of the front slitting wheel assembly is 55-60 degrees, the center distance of the two cutting edges is 31.2-33.2 mm, and the width of the wedge top is 1.6-2.2 mm; the wedge angle of the blade of the rear cutting wheel assembly is 80 degrees, and the width of the wedge top is 0.8 mm; the distance between the front slitting wheel assembly and the rear slitting wheel assembly in the advancing direction of the rolled piece is 100 mm. All adopt the mode of five-line segmentation simultaneously among the conventional art, the holistic effort that comes the material part and receive is big, is difficult to ensure the effort of every cutting edge balanced moreover, when five rolled pieces are cut out simultaneously, leads to the rolled piece to take place the deformation and bend because the effort is unbalanced easily, seriously influences rolling quality, the indiscriminate steel of cold bed, the condition of flying shear pile steel appear easily. In the embodiment, two rolled pieces on the outermost side of the whole incoming material are firstly split, the front splitting wheel assembly only has two splitting wheel blade structures in the direction perpendicular to the advancing direction of the rolled pieces, namely, the whole incoming material is only acted by the two splitting wheel blades simultaneously, so that the balance of acting force can be better guaranteed, the splitting quality is guaranteed, the deformation of the rolled pieces is avoided, the splitting quality is improved, the two rolled pieces on the outermost side and the three rolled pieces in the middle are obtained after the treatment of the front splitting wheel assembly and are still connected in parallel, the parallel pieces are then advanced to the rear splitting wheel assembly for treatment, the rear splitting wheel assembly only has two splitting wheel blade structures in the direction perpendicular to the advancing direction of the rolled pieces, namely, the parallel pieces are only acted by the two splitting wheel blades, so that the balance of acting force can be guaranteed, the splitting quality is guaranteed, the parallel pieces are split to obtain three rolled pieces, and the total five rolled pieces are respectively rolled into finished products through the K2 elliptical hole and the K1 finished product hole.
Furthermore, the circular hole for the K7 feeding is a circular hole, and the design size is phi 51 mm; the K6 horizontal through hole is a horizontal flat hole; according to the cutting production experience and the principle beneficial to material type control, the inclination of the side wall of the K5 vertical box-shaped hole is 0.12, the fillet is designed to be 2mm, and the width of the groove bottom is designed to be 17 mm;
optimizing the hole pattern design of a K4 pre-splitting hole and a K3 splitting hole, reasonably distributing the pre-splitting wedge, the pressure amount of the splitting wedge and the splitting angle design, wherein the extension coefficient of the K4 pre-splitting hole is 1.25-1.32, specifically, the center distance between the middle adjacent hole patterns of the K4 pre-splitting hole is 15.2mm, the center distance between the two hole patterns on the most lateral side is 61mm, the wedge angle design of the K4 pre-splitting hole is matched with the angle of the K3 splitting hole wedge and has wear resistance, the wedge angle of the K4 pre-splitting hole is 85-87 degrees, the arc radius of the wedge top is 1.5-1.8 mm, the strength is high, the wedge tip is not easy to collapse, the wear resistance is better, the distance between the upper wedge top and the lower wedge top is 6.8mm, the distance between the two wedge tops is excessively small, and the depressing coefficient is far larger than the depressing coefficient of the bottom of the groove at the bottom of the groove, so that severe wear is caused; the excessively large wedge can cause the cutting hole and the cutting wedge to be abraded too fast, even the cutting wedge collapses, the folding is formed on the surface of a finished product, the distance between the top and the bottom of the wedge is set to be an appropriate value, the abrasion can be reduced, the phenomenon that the cutting wedge collapses due to excessively large deformation force caused by the sharp increase of the rolling reduction is avoided, and the radius of the bottom of the groove is 6.6 mm;
the K3 cutting hole has the functions of regulating material types of five-line rolled pieces, processing and cutting strips and preparing material types for cutting, the extension coefficient of the K3 cutting hole is 1.10-1.25, the center distance between the middle adjacent hole types of the K3 cutting hole is 15.4mm, the center distance between the two hole types at the most lateral side is 61.8mm, the wedge angle is 55-60 degrees, the arc radius of the wedge top is 0.6-0.7 mm, the strength is guaranteed to meet the requirement, the wedge point is prevented from collapsing, the distance between the upper wedge top and the lower wedge top is 0.7-0.9 mm, the distance between the upper wedge top and the lower wedge top of the K3 cutting hole is too wide, the incomplete secondary pressing of the K2 elliptical hole channel causes early rolling marks of finished hole types, and the cutting wheel is stressed too much, so that guide and guard bearing burning accidents occur; the distance between the top wedge and the bottom wedge of the K3 cutting hole is small, the cutting strip is directly ground on the surface of the K2 elliptical hole, the folding phenomenon occurs in the finished product pass, the height of the groove bottom is 14.13mm, and the radius of the groove bottom is 6.8 mm. The cooling water pipe is arranged at the roller of the K3 cutting hole, so that the cooling effect is enhanced, the water cooling effect of the pre-cutting wedge and the cutting wedge is improved, and the abrasion of the pre-cutting wedge and the cutting wedge is delayed
The inlet of the K4 pre-splitting hole is provided with a double-row four-wheel rolling guide, and the guide wheel is designed into a V shape, so that the clamping of a rolled piece is facilitated, and the stability and the centering property of the rolled piece in operation are ensured; k4 precut the export in minute hole and set up box export in advance, the inner chamber size is greater than the rolled piece 5 ~ 10mm, and length is 540mm, is favorable to improving the stability of rolled piece. The cutting hole of K3 is unanimous with the pre-cut hole of K4, and the double four-wheel roll guide is set up to K3 cutting hole import to the guide pulley design is the V-arrangement. A total 16-18 rolling mills are adopted in the five-slitting rolling process of the phi 12mm steel bar, in order to reduce faults among the 16-18 rolling mills, a No. 6 loop device and a No. 7 loop device are replaced by 4 guide grooves, and meanwhile, the functions of conveniently observing, guiding and guarding centering and preventing head warping are considered during design. The design of the 7# guide groove is consistent with that of the 6# guide groove; a5-wire guide pipe and a fixed base are designed between a K1 finished product hole and a 3# flying shear, the center distance of the guide pipe is 135mm, meanwhile, the quick replacement is considered, and the bolt fixing mode is changed into a wedge beating mode.
By adopting the rolling process, the rolling speed reaches 13.5-14 m/s, the hourly output of the rolling mill is increased to over 180t/h, the failure rate is effectively reduced, the rolling load of the K3 splitting holes is reduced by the pass design of the K4 pre-splitting holes, and the stability of the rolling process is ensured.
The above is only a preferred embodiment of the present invention, and it should be noted that the above preferred embodiment should not be considered as limiting the present invention, and the protection scope of the present invention should be subject to the scope defined by the claims. It will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the spirit and scope of the invention, and these modifications and adaptations should be considered within the scope of the invention.
Claims (10)
1. The five-slitting rolling process for the phi 12mm steel bar is characterized in that incoming materials are processed by a pass system, the pass system comprises a K7 incoming material round hole, a K6 horizontal through hole, a K5 vertical box-shaped hole, a K4 pre-slitting hole, a K3 slitting hole, a K2 elliptical hole and a K1 finished product hole which are sequentially arranged, five holes are formed in the K4 pre-slitting hole, the K3 slitting hole, the K2 elliptical hole and the K1 finished product hole, an outlet of the K3 slitting hole is firstly slit into two outermost rolled pieces, and then the middle three rolled pieces are slit.
2. The five-slitting rolling process for phi 12mm steel bars according to claim 1, wherein slitting of the rolled piece is performed by a slitting wheel method.
3. The five-slitting rolling process for phi 12mm rebars according to claim 1, wherein the exit of the K3 slitting opening is provided with a front slitting wheel assembly and a rear slitting wheel assembly at intervals along the rolling stock traveling direction, the front slitting wheel assembly slitting the two outermost rolled stocks and the rear slitting wheel assembly slitting the middle three rolled stocks.
4. The five-slitting rolling process for phi 12mm steel bars according to claim 3, wherein the wedge angle of the cutting edges of the front slitting wheel assembly is 55-60 degrees, the center distance between the two cutting edges is 31.2-33.2 mm, and the wedge top width is 1.6-2.2 mm.
5. The five-slitting rolling process for phi 12mm steel bars according to claim 3, wherein the blade wedge angle of the rear slitting wheel assembly is 80 degrees, and the wedge top width is 0.8 mm.
6. The five-slitting rolling process for phi 12mm rebars according to claim 3, wherein the distance between the front slitting wheel assembly and the rear slitting wheel assembly in the rolling stock traveling direction is 100 mm.
7. The five-slitting rolling process of a phi 12mm steel bar according to claim 1, wherein the center-to-center distance between adjacent groove patterns in the middle of the K4 pre-slitting hole is 15.2mm, the center-to-center distance between two groove patterns on the outermost side is 61mm, the wedge angle is 85-87 degrees, the arc radius of the wedge top is 1.5-1.8 mm, the distance between the upper wedge top and the lower wedge top is 6.8mm, and the radius of the groove bottom is 6.6 mm.
8. The five-slitting rolling process of a phi 12mm steel bar according to claim 1, wherein the center-to-center distance between adjacent groove patterns in the middle of the K3 slitting hole is 15.4mm, the center-to-center distance between two groove patterns on the outermost side is 61.8mm, the wedge angle is 55-60 degrees, the arc radius of the wedge top is 0.6-0.7 mm, the distance between the upper wedge top and the lower wedge top is 0.7-0.9 mm, the height of the groove bottom is 14.13mm, and the radius of the groove bottom is 6.8 mm.
9. The five-slitting rolling process of phi 12mm steel bars according to claim 1, wherein the inlet of the K4 pre-slitting hole is provided with a double-row four-wheel rolling guide and guard, the guide wheel is designed into a V shape, the outlet of the K4 pre-slitting hole is provided with a box-type outlet, the size of an inner cavity is 5-10 mm larger than that of a rolled piece, and the length is 540 mm.
10. The five-slitting rolling process for the phi 12mm steel bar according to claim 1, wherein the elongation coefficient of the K4 pre-slitting holes is 1.25-1.32, and the elongation coefficient of the K3 slitting holes is 1.10-1.25.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111206000.3A CN113941598A (en) | 2021-10-14 | 2021-10-14 | Five-slitting rolling process for phi 12mm steel bar |
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| CN202111206000.3A CN113941598A (en) | 2021-10-14 | 2021-10-14 | Five-slitting rolling process for phi 12mm steel bar |
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Application publication date: 20220118 |