CN114888076A - Rolling method of single-side double-groove spring flat steel - Google Patents
Rolling method of single-side double-groove spring flat steel Download PDFInfo
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- CN114888076A CN114888076A CN202210618723.2A CN202210618723A CN114888076A CN 114888076 A CN114888076 A CN 114888076A CN 202210618723 A CN202210618723 A CN 202210618723A CN 114888076 A CN114888076 A CN 114888076A
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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
- B21B1/08—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 structural sections, i.e. work of special cross-section, e.g. angle steel
- B21B1/0805—Flat bars, i.e. having a substantially rectangular cross-section
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention relates to a rolling method of a single-side double-groove spring flat steel, which specifically comprises the following steps: 1) heating the steel billet in a heating furnace for 80-100 minutes, wherein the tapping temperature is 1010-1050 ℃; 2) the method comprises the following steps that (1) after steel billets are subjected to high-pressure water descaling to remove surface iron oxide scales, the steel billets are sequentially subjected to rolling through a rough rolling unit, a medium rolling unit and a finishing rolling unit; 3) firstly, rolling a rolled piece in a 17# rolling mill in a finishing mill group for the first time in a double-groove pre-rolling mode, wherein the area of the double grooves formed in the first time in a rolling mode is 30% -50% of the area of the double grooves of a finished product; 4) the rolled piece is subjected to secondary double-groove rolling in a 18# rolling mill, namely all rolling procedures are completed, and an inlet guide and guard adopt WBF series six-wheel rolling guide and guard; the rolling method can better ensure the surface quality of the single-face double-groove spring flat steel by a multi-forming method, is convenient to operate, reduces the times of hole type replacement and the time of machine halt, improves the yield and qualification rate of the single-face double-groove spring flat steel, reduces the production cost and improves the economic benefit.
Description
Technical Field
The invention relates to the technical field of spring steel production processes, in particular to a rolling method of single-side double-groove spring flat steel.
Background
The spring flat steel is mainly used for an automobile suspension system, and the requirement on the spring flat steel is very strict due to the very harsh working condition of the spring. The spring flat steel can be divided into plane semicircular arc spring flat steel, plane large arc spring flat steel, plane rectangular spring flat steel and single-face double-groove spring flat steel according to the cross section shape. According to different models of automobiles, spring flat steel with different cross-sectional shapes is selected by automobile manufacturers to manufacture the spring suspension assembly. The single-face double-groove spring flat steel has double grooves, so that the weight of the spring pieces and the friction between the spring pieces can be reduced, a good ventilation and heat dissipation effect is achieved, and the service life of the spring suspension assembly can be prolonged. The single-side double-groove spring flat steel has more complex sections in the hot rolling production process, and the section size needing to be controlled is more than that of other spring flat steels, so that the spring flat steel is more difficult to roll. The common single-side double-groove spring flat steel is formed by hot rolling in the last double groove one step, the double-groove rolling reduction is large, the deformation is uneven, the wear of the finished roll pass is fast, in order to ensure the surface quality of the single-side double-groove spring flat steel, the finished pass needs to be replaced when only 50t is produced during rolling, and the production control is not facilitated.
Disclosure of Invention
The invention aims to provide a rolling method of a single-side double-groove spring flat steel, which can better ensure the surface quality of the single-side double-groove spring flat steel by a multi-time forming method, is convenient to operate, reduces the times of hole type replacement and machine halt errors, improves the yield and qualification rate of the single-side double-groove spring flat steel, reduces the production cost and improves the economic benefit.
The specific scheme of the invention is as follows: a rolling method of a single-face double-groove spring flat steel specifically comprises the following steps:
1) heating the steel billet in a heating furnace for 80-100 minutes, wherein the tapping temperature is 1010-1050 ℃;
2) the method comprises the following steps that after steel billets are subjected to high-pressure water descaling and surface iron scale removal, the steel billets are sequentially subjected to rolling through a rough rolling unit, a middle rolling unit and a finishing rolling unit, wherein the rough rolling unit is provided with six rolling mills, the rolling mills are numbered from 1# to 6# in sequence, and the deformation is 40-60%; six rolling mills are arranged in the middle rolling mill group, the serial numbers of the rolling mills are 7# -12 # in sequence, and the deformation is 20-30%; the finishing mill group is provided with six rolling mills, the rolling mills are numbered in sequence from 13# to 18#, and the deformation is 20-30%;
3) firstly, rolling a rolled piece in a 17# rolling mill in a finishing mill group for the first time by double-groove pre-rolling, wherein the area of the double grooves formed by the first time rolling is 30% -50% of the area of the double grooves of a finished product, the width and the depth of a pre-rolling single groove are both smaller than the width and the depth of a finished product single groove, and an inlet guide adopts a WBF series six-wheel rolling guide;
4) and (4) rolling the rolled piece in a 18# rolling mill for the second time by double grooves, namely finishing all rolling procedures, wherein the inlet guide and guard adopt a WBF series six-wheel rolling guide and guard.
Further, the steel rolling in the roughing mill set adopts a horizontal and vertical alternative rolling process in sequence; the 16# rolling mill in the finishing mill group is a vertical rolling mill, the 17# rolling mill is a horizontal rolling mill, and the 18# rolling mill is a horizontal rolling mill.
Further, the 10# rolling mill in the intermediate mill group is empty.
The invention has the beneficial effects that:
1. the invention solves the problem of quick wear of the finished roll pass caused by the hot rolling final pass double-groove one-step forming process of the single-side double-groove spring flat steel, the finished pass can reach 150 t/hole during rolling after improvement, and the single-hole steel excess is improved by 2 times.
2. The multi-forming method can better ensure the surface quality of the single-face double-groove spring flat steel, is convenient to operate, reduces the times of hole replacement and the time of machine halt, improves the yield and the qualification rate of the single-face double-groove spring flat steel, reduces the production cost and improves the economic benefit.
Drawings
FIG. 1 is a schematic view of a process for producing a single-sided double-groove spring flat steel according to the present invention;
FIG. 2 is a schematic view of a pre-rolled slot in a first embodiment of the present invention;
FIG. 3 is a schematic view of a final formed rolled slot in a first embodiment of the present invention;
FIG. 4 is a view showing a pre-rolled slot in a second embodiment of the present invention;
figure 5 is a schematic view of a final formed rolled slot in a second embodiment of the present invention.
In the figure: 1-rough rolling unit, 2-middle rolling unit, 3-finishing rolling unit, 4-pre-rolling slotted hole, and 5-finally forming rolling slotted hole.
Detailed Description
The technical solutions of the present invention will be described in detail and fully below with reference to the accompanying drawings, and it is to be understood 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.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally arranged when products of the present invention are used, and are only used for convenience in describing the present invention or simplifying the description, but do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, or be operated, and thus, should not be construed as limiting the present invention.
Referring to fig. 1 to 5, the invention adopts a multiple double-groove forming process used in the last several hot rolling passes, and the double grooves are pre-rolled before the finished product passes, so that the rolling reduction of the double grooves in the finished product passes is reduced. The rolling mill for double-groove pre-rolling in the single-side double-groove spring flat steel multi-forming method is a horizontal rolling mill. The rolling process of the invention has 18 rolling mills on the whole line, wherein the number of the roughing mill group is 6, the number of the rolling mills is 1# to 6#, and the deformation is 40-60%; 6 rolling mills with rolling mill numbers of 7# to 12# are arranged in the middle rolling mill set, and the deformation is 20-30%; the finishing mill group has 6 mills, the number of the mill is 13# to 18#, the deformation is 20 percent to 30 percent, the 16# mill of the finishing mill group is a vertical mill, the width dimension of the red steel is controlled, the 17# mill is a horizontal mill, the flat steel is pre-rolled into double grooves, and the 18# mill is a horizontal mill, so that the flat steel is formed and rolled.
The spring flat steel billet related by the invention is a square billet with the thickness of 150mm multiplied by 150 mm-200 mm multiplied by 200mm, is heated in a heating furnace for a certain time, and is rolled into single-sided double-groove spring flat steel with different widths and thicknesses by a rolling mill. Different rolling processes are selected among 1# to 18# rolling mills according to different steel billet sections and specifications of products to be produced in rolling passes, and partial rolling mills are overhead to ensure that at least the last two or more rolling mills are double-groove forming passes.
The embodiments of the present invention are explained below in detail.
Example 1:
the spring flat steel billet is rolled into a single-face double-groove spring flat steel with 13mm multiplied by 75mm by using a square billet with 160mm multiplied by 160mm, and the method comprises the following specific steps:
1) heating the steel billet in a heating furnace for 80-90 minutes, wherein the tapping temperature is 1010-1050 ℃;
2) descaling the billet by high pressure water to remove surface scale, rolling in rolling mills such as a roughing mill group, a middle mill group, a finishing mill group and the like, wherein the material type of the rolled piece in a 6# rolling mill is 70mm multiplied by 70mm square, the material type of the rolled piece in a 12# rolling mill is 71mm multiplied by 31mm rectangle, and the material type of the rolled piece in a 16# rolling mill is 71.5mm multiplied by 15mm rectangle;
3) the rolled piece is subjected to first double-groove pre-rolling in a 17# rolling mill, the area of the double grooves formed by the first rolling is 30% -50% of the area of the double grooves of a finished product, the width and the depth of a pre-rolling single groove are both smaller than those of a finished product single groove, and the material type of the rolled piece in the 17# rolling mill is 14mm multiplied by 74.5 mm; the inlet guide adopts WBF series six-wheel rolling guide, which is convenient for the size adjustment of the double grooves;
4) and the rolled piece is subjected to secondary double-groove rolling in an 18# rolling mill to finish all rolling procedures, and the inlet guide adopts a WBF series six-wheel rolling guide, so that the double-groove size adjustment is facilitated. The size deviation of the finished product meets the requirements in the national standard GB/T33164.1-2016.
Example 2:
the spring flat steel billet is rolled into single-side double-groove spring flat steel with the thickness of 11mm multiplied by 90mm by using a square billet with the thickness of 160mm multiplied by 160mm, and the method comprises the following specific steps:
1) heating the steel billet in a heating furnace for 90-100 minutes, wherein the tapping temperature is 1010-1050 ℃;
2) the billet is descaled by high pressure water to remove surface iron scale, and is rolled by rolling mills such as a roughing mill group, a middle mill group, a finishing mill group and the like, the material type of the rolled piece in a 6# rolling mill is 90mm multiplied by 90mm square, the material type of the rolled piece in a 12# rolling mill is 84mm multiplied by 37mm rectangle, and the material type of the rolled piece in a 16# rolling mill is 86mm multiplied by 13.3mm rectangle;
3) the rolled piece is subjected to first double-groove pre-rolling in a 17# rolling mill, the area of the double grooves formed by the first rolling is 30% -50% of the area of the double grooves of a finished product, the width and the depth of a pre-rolling single groove are both smaller than those of a finished product, the material type of the rolled piece in the 17# rolling mill is 12mm multiplied by 89.5mm, and the inlet guide and guard adopt WBF series six-wheel rolling guide and guard, so that the size adjustment of the double grooves is facilitated;
4) and (3) rolling the rolled piece in a 18# rolling mill for the second time in double grooves to finish all rolling procedures, wherein the inlet guide adopts a WBF series six-wheel rolling guide, so that the double-groove size adjustment is convenient, and the size deviation of the finished product meets the requirements in the national standard GB/T33164.1-2016.
According to the invention, according to different production processes of the spring flat steel, a single-face double-groove spring flat steel double-groove multiple forming rolling method is adopted, so that the surface quality of a product is improved, the yield and qualification rate of the single-face double-groove spring flat steel are improved, the production cost is reduced, and the economic benefit is increased.
Claims (3)
1. The rolling method of the single-face double-groove spring flat steel is characterized by comprising the following steps:
1) heating the steel billet in a heating furnace for 80-100 minutes, wherein the tapping temperature is 1010-1050 ℃;
2) the method comprises the following steps that after steel billets are subjected to high-pressure water descaling and surface iron scale removal, the steel billets are sequentially subjected to rolling through a rough rolling unit, a middle rolling unit and a finishing rolling unit, wherein the rough rolling unit is provided with six rolling mills, the rolling mills are numbered from 1# to 6# in sequence, and the deformation is 40-60%; six rolling mills are arranged in the middle rolling mill group, the serial numbers of the rolling mills are 7# -12 # in sequence, and the deformation is 20-30%; the finishing mill group is provided with six rolling mills, the rolling mills are numbered in sequence from 13# to 18#, and the deformation is 20-30%;
3) firstly, rolling a rolled piece in a 17# rolling mill in a finishing mill group for the first time by double-groove pre-rolling, wherein the area of the double grooves formed by the first time rolling is 30% -50% of the area of the double grooves of a finished product, the width and the depth of a pre-rolling single groove are both smaller than the width and the depth of a finished product single groove, and an inlet guide adopts a WBF series six-wheel rolling guide;
4) and (4) rolling the rolled piece in a 18# rolling mill for the second time by double grooves, namely finishing all rolling procedures, wherein the inlet guide and guard adopt a WBF series six-wheel rolling guide and guard.
2. The rolling method of a single-sided double-groove spring flat steel according to claim 1, characterized in that: the steel rolling in the roughing mill group sequentially adopts a horizontal and vertical alternative rolling process; the 16# rolling mill in the finishing mill group is a vertical rolling mill, the 17# rolling mill is a horizontal rolling mill, and the 18# rolling mill is a horizontal rolling mill.
3. The rolling method of a single-sided double-groove spring flat steel according to claim 1, characterized in that: and the 10# rolling mill in the middle rolling mill group is empty.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210618723.2A CN114888076A (en) | 2022-06-02 | 2022-06-02 | Rolling method of single-side double-groove spring flat steel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210618723.2A CN114888076A (en) | 2022-06-02 | 2022-06-02 | Rolling method of single-side double-groove spring flat steel |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1857807A (en) * | 2006-05-30 | 2006-11-08 | 江阴博丰钢铁有限公司 | Hot rolling process of wide flat bar steel |
| CN101195124A (en) * | 2007-12-27 | 2008-06-11 | 江苏沙钢集团淮钢特钢有限公司 | Method for tandem rolling steel flat for automobile beam |
| CN112893488A (en) * | 2021-02-08 | 2021-06-04 | 新疆八一钢铁股份有限公司 | Method for adjusting asymmetry degree during rolling of double-groove spring flat steel |
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2022
- 2022-06-02 CN CN202210618723.2A patent/CN114888076A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1857807A (en) * | 2006-05-30 | 2006-11-08 | 江阴博丰钢铁有限公司 | Hot rolling process of wide flat bar steel |
| CN101195124A (en) * | 2007-12-27 | 2008-06-11 | 江苏沙钢集团淮钢特钢有限公司 | Method for tandem rolling steel flat for automobile beam |
| CN112893488A (en) * | 2021-02-08 | 2021-06-04 | 新疆八一钢铁股份有限公司 | Method for adjusting asymmetry degree during rolling of double-groove spring flat steel |
Non-Patent Citations (2)
| Title |
|---|
| 肖湘军: "单面双槽弹簧扁钢孔型设计", 涟钢科技与管理, 31 December 1995 (1995-12-31), pages 33 - 36 * |
| 陈明: "热轧弹簧扁钢质量缺陷分析及控制", 河北冶金, no. 4, 30 April 2020 (2020-04-30), pages 57 - 59 * |
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