CN112872026A - Method for adjusting thickness of special-shaped blank flange in large-scale H-shaped steel rolling process - Google Patents
Method for adjusting thickness of special-shaped blank flange in large-scale H-shaped steel rolling process Download PDFInfo
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- CN112872026A CN112872026A CN202011568621.1A CN202011568621A CN112872026A CN 112872026 A CN112872026 A CN 112872026A CN 202011568621 A CN202011568621 A CN 202011568621A CN 112872026 A CN112872026 A CN 112872026A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 49
- 239000010959 steel Substances 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000005096 rolling process Methods 0.000 title claims abstract description 23
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 94
- 229910052802 copper Inorganic materials 0.000 claims abstract description 94
- 239000010949 copper Substances 0.000 claims abstract description 94
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 230000007246 mechanism Effects 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 14
- 230000009471 action Effects 0.000 claims description 4
- 238000006073 displacement reaction Methods 0.000 claims description 4
- 238000009413 insulation Methods 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000002436 steel type Substances 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000009749 continuous casting Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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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
- B21B1/088—H- or I-sections
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
Abstract
The invention provides a method for adjusting the thickness of a flange of a special-shaped blank in a large H-shaped steel rolling process, which comprises the steps of controlling a transverse moving device to operate through a hydraulic system, and driving a left copper plate and a right copper plate to move through the transverse moving device; the copper plates are linearly moved through the guide device to ensure that the gap between the upper copper plate and the lower copper plate of the left copper plate and the right copper plate is not changed; the detection mechanism detects the positions of the left and right copper plates and the pressure of molten steel on the copper plates during casting, and transmits the detected values to the control equipment, so that the thickness adjustment of the special-shaped steel billet is monitored. The method for adjusting the flange thickness rolls the special-shaped blank, so that the rolling adjustment of the H-shaped steel is flexible and convenient, the rolled light H-shaped steel is produced by adopting the thin flange thickness, the rolled conventional H-shaped steel is produced by adopting the medium flange thickness, and the rolled heavy H-shaped steel is produced by adopting the flange with the maximum thickness.
Description
Technical Field
The invention belongs to the technical field of steel rolling, and particularly relates to a method for adjusting the thickness of a flange of a special-shaped blank in a large H-shaped steel rolling process.
Background
Continuous casting of shaped billets has been developed along with the production of H-sections, continuous casting of shaped billets has been a relatively mature technology throughout the world, and 20 or more special-shaped continuous casting machines have been used abroad to provide billets for H-section rolling lines. In recent years, the rapid development of H-shaped steel in China promotes various technologies of continuous casting of special-shaped billets and the great improvement of the performance of continuous casting billets.
The general technological process of producing H-shaped steel with continuous casting special-shaped blank includes steel making → continuous casting of special-shaped blank → blanking cold bed → heating furnace → high-pressure water descaling → cogging mill → universal mill set → hot H-shaped steel product.
The blanks used in the production line of large H-shaped steel in domestic production at the present stage are continuous casting special-shaped blanks, the width of the special-shaped blank is 500-1024mm, the height of the special-shaped blank is 300-450mm, the thickness of a web plate is 90-120mm, the thickness of a flange is 95-130mm, the special-shaped blank crystallizer adopts a combined structure, and the overall dimension, the thickness of the web plate and the thickness of the flange of the continuous casting blank are fixed and cannot be adjusted.
According to national H-shaped steel standard GB/T11263-2017 of China, each series of H-shaped steel has several specifications, the external dimensions are slightly different, the same type and different specifications correspond to different web thicknesses and flange thicknesses, for example, HW400X400 series, the web thickness is increased from 15mm to 45mm, the flange thickness is increased from 15mm to 70mm, 9 different specifications are provided, if a series of products with all specifications are rolled by a special-shaped blank with the same flange thickness, the flange height of a finished product with the minimum specification exceeds the upper deviation of the standard, and the flange height of a finished product with the maximum specification is lower than the lower deviation of the standard, so that the finished product is unqualified.
Because the roughing mill rolls by adopting the open hole, the flange thickness of a rolled piece cannot be processed, the metal amount of the flange of the intermediate blank rolled by the roughing mill cannot be effectively adjusted, and the proportional relation of all specifications of the same series to the flange thickness of the intermediate blank and the web thickness cannot be met, the finished product can hardly reach the qualified size by adjusting the roll gap of the roughing mill or a universal unit, even the defect that the flange and web extension difference is too large to form the flange wave or the web wave of the finished product can be easily caused in the adjusting process, and the yield of the product is greatly reduced.
The novel adjustable process for the flange thickness of the special-shaped blank is developed aiming at the problem that finished product defects easily occur in the rolling of products of the same series and different specifications through the fixed flange thickness of the special-shaped blank, the thickness of the flange of the special-shaped blank is adjusted on line, the process is suitable for the rolling of products of the same series and different specifications, and the process can realize the breakthrough in the following aspects:
1) and the smooth rolling of products of the same series with different specifications is realized by adjusting the thickness of the flange of the special-shaped blank on line.
2) The same series of products with different specifications can completely adopt the same set of hole type system, and the reserve volume of the roller is small.
3) The roll gaps of the roughing mill and the finishing mill set are very easy to adjust, and the product debugging period is short.
4) And the hole type system of the roughing mill shared by adjacent series of products can be realized by adjusting the thickness of the flange of the special-shaped blank on line, so that the hole type sharing property is increased.
5) And the rolling of light and thin H-shaped steel and heavy H-shaped steel is very convenient.
Disclosure of Invention
In view of the above, the present invention aims to provide a method for adjusting the thickness of a flange of a beam blank in a large H-section steel rolling process, so as to solve the problem that finished product defects are likely to occur when the thickness of a fixed flange of the beam blank is rolled into products of the same series and different specifications.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a method for adjusting the thickness of a flange of a beam blank in a large H-shaped steel rolling process comprises the following steps:
s1, controlling the operation of the transverse moving device through a hydraulic system, and driving the left and right copper plates to move through the transverse moving device;
s2, the copper plates are moved linearly through the guide device to ensure that the gap between the upper copper plate and the lower copper plate of the left copper plate and the right copper plate is not changed;
and S3, detecting the positions of the left and right copper plates and the pressure of the molten steel on the copper plates during casting through a detection mechanism, and transmitting the detected values to a control device, thereby realizing the monitoring of the thickness adjustment of the special-shaped steel billet.
Further, the hydraulic system in step S1 adopts a servo hydraulic system, the detection mechanism feeds back actual position data of the detected left and right copper plates to the servo system, the servo system compares the actual position data with set position data, and drives the left and right copper plates through the traverse device, so that the copper plate position is always kept at a set position, thereby realizing closed-loop control of the position of the left and right copper plates, detecting pressures generated on the side walls of the copper plates by different steel types, different casting durations, and molten steel temperature differences, comparing the actual pressure with the set pressure, and controlling the position of the traverse mechanism through the servo system, so that the pressure is kept at the set value, thereby realizing double closed-loop control of the position and the pressure.
Furthermore, in the step S2, the traversing device directly drives the left and right copper plates by the AGC servo hydraulic cylinder, and simultaneously, in order to ensure that there is no gap connection between the AGC hydraulic cylinder and the copper plates, a piston rod of the AGC hydraulic cylinder is closed to the side of the copper plates by a pressing plate, and a heat insulation plate is arranged at the joint.
Furthermore, in the step S3, the detection mechanism mainly detects the position of the left and right copper plates and the pressure of the molten steel on the action copper plate during casting, the position detection is directly detected by a hysteresis displacement sensor mounted on the AGC hydraulic cylinder, the sensor precision can reach 0.002mm, the pressure detection is indirectly detected by an oil pressure sensor mounted on the AGC hydraulic cylinder and combined with the cylinder diameter parameter of the AGC hydraulic cylinder, and the pressure detection is converted into a pressure value.
Compared with the prior art, the method for adjusting the thickness of the flange of the beam blank in the large-scale H-shaped steel rolling process has the following advantages:
(1) the method for adjusting the flange thickness rolls the special-shaped blank, so that the rolling adjustment of the H-shaped steel is flexible and convenient, the rolled light H-shaped steel is produced by adopting the thin flange thickness, the rolled conventional H-shaped steel is produced by adopting the medium flange thickness, and the rolled heavy H-shaped steel is produced by adopting the flange with the maximum thickness.
(2) The flange thickness adjustable method of the invention can adjust the flange thickness of the special-shaped blank, so that the rolling pass system has stronger universality, one specification series of H-shaped steel can completely adopt a set of pass system, the roll gap adjustment of the rolling mill is simpler, and the product quality is very easy to control.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view illustrating that the thickness of a beam blank flange according to an embodiment of the present invention is adjustable.
Description of reference numerals:
1-1: continuously casting a special-shaped blank; 1-2: a web lower copper plate; 1-3: a copper plate on the web plate; 1-4: a right flange adjustable copper plate; 1-5: the left flange is an adjustable copper plate.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, a method for adjusting the thickness of a flange of a beam blank in a large H-section steel rolling process includes the following steps:
s1, controlling the operation of the transverse moving device through a hydraulic system, and driving the left and right copper plates to move through the transverse moving device;
s2, the copper plates are moved linearly through the guide device to ensure that the gap between the upper copper plate and the lower copper plate of the left copper plate and the right copper plate is not changed;
and S3, detecting the positions of the left and right copper plates and the pressure of the molten steel on the copper plates during casting through a detection mechanism, and transmitting the detected values to a control device, thereby realizing the monitoring of the thickness adjustment of the special-shaped steel billet.
In the step S1, the hydraulic system adopts a servo hydraulic system, the detection mechanism feeds back actual position data of the detected left and right copper plates to the servo system, the servo system compares the actual position data with the set position data, and drives the left and right copper plates through the traversing device, so that the copper plate position is always kept at the set position, thereby realizing closed-loop control of the position of the left and right copper plates, detecting pressures generated on the side walls of the copper plates by different steel types, different casting durations and molten steel temperature differences, comparing the actual pressure with the set pressure, and controlling the position of the traversing mechanism through the servo system, so that the pressure is kept at the set value, thereby realizing double closed-loop control of the position and the pressure.
In the step S2, the traversing device adopts a mode that the AGC servo hydraulic cylinder directly drives the left copper plate and the right copper plate, and meanwhile, in order to ensure that the AGC hydraulic cylinder is in gapless connection with the copper plates, a piston rod of the AGC hydraulic cylinder is closed on the side surface of the copper plate through a pressing disc, and a heat insulation plate is arranged at the joint.
The detection mechanism in the step S3 mainly detects the position of the left and right copper plates and the pressure of the molten steel on the action copper plate during casting, the position detection is directly detected by a hysteresis displacement sensor arranged on the AGC hydraulic cylinder, the accuracy of the sensor can reach 0.002mm, the pressure detection is indirectly detected by an oil pressure sensor arranged on the AGC hydraulic cylinder and combining with the cylinder diameter parameter of the AGC hydraulic cylinder, and the pressure detection is converted into a pressure value.
The specific process is as follows:
the shaping of the beam blank is mainly finished in a crystallizer, the beam blank crystallizer adopts a copper plate structure, cooling water is introduced into the copper plate for cooling, the whole crystallizer consists of four copper plates, an upper copper plate and a lower copper plate form a beam blank web, the inner side of a flange and the height of the flange, and the copper plates on the left side and the right side control the thickness of the flange.
In the production, the thickness of the web plate of the beam blank is not basically adjusted, and the upper copper plate and the lower copper plate adopt a fixed form; the thickness of the special-shaped blank can be adjusted according to the thickness of a produced product, the thickness adjustment of the special-shaped blank is realized by the transverse movement of a left copper plate and a right copper plate of the crystallizer, and the transverse movement of the copper plates is composed of a guide device, a transverse movement driving device, a hydraulic system and a detection mechanism.
The guiding device makes the copper plate move linearly to ensure the gap between the upper copper plate and the lower copper plate of the left copper plate and the right copper plate to be constant.
The transverse moving device adopts a mode that the AGC servo hydraulic cylinder directly drives the left copper plate and the right copper plate, and simultaneously, in order to ensure that no gap is formed between the AGC hydraulic cylinder and the copper plates, a piston rod of the AGC hydraulic cylinder is closed on the side surface of the copper plate through a pressing disc, and a heat insulation plate is arranged at the joint.
The hydraulic system adopts a servo hydraulic system to realize the position closed-loop control of the left and right copper plates, and can realize the double closed-loop control of the position and the pressure according to different steel types, different casting time lengths and molten steel temperature differences during the casting of the special-shaped blank.
The detection mechanism mainly detects the positions of the left and right copper plates and the pressure of molten steel on the action copper plate during casting, the position detection is directly detected by a magnetic hysteresis displacement sensor (RHM0160MP021S2G4100) arranged on an AGC hydraulic cylinder, the accuracy of the sensor can reach 0.002mm, and the pressure detection is indirectly detected by an oil pressure sensor (HDA4744-A-400-031(350bar)) arranged on the AGC hydraulic cylinder and combined with the cylinder diameter parameter of the AGC hydraulic cylinder and converted into a pressure value.
The left and right copper plates can be independently adjusted under the control of a hydraulic servo mechanism, and the adjustment amount of each copper plate is +/-20 mm.
The technical scheme of producing the large H-shaped steel by adopting the special-shaped blank with the adjustable flange thickness provides great convenient conditions for producing the large H-shaped steel products of the same series and different specifications, the rolling pass system is completely shared, the spare roll amount of the rollers is reduced, the production adjustment operation is simple, and the process is a feasible large H-shaped steel production process.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (4)
1. A method for adjusting the thickness of a flange of a beam blank in a large H-shaped steel rolling process is characterized by comprising the following steps:
s1, controlling the operation of the transverse moving device through a hydraulic system, and driving the left and right copper plates to move through the transverse moving device;
s2, the copper plates are moved linearly through the guide device to ensure that the gap between the upper copper plate and the lower copper plate of the left copper plate and the right copper plate is not changed;
and S3, detecting the positions of the left and right copper plates and the pressure of the molten steel on the copper plates during casting through a detection mechanism, and transmitting the detected values to a control device, thereby realizing the monitoring of the thickness adjustment of the special-shaped steel billet.
2. The method for adjusting the thickness of the flanges of the beam blank in the rolling process of the large-sized H-shaped steel according to claim 1, wherein the method comprises the following steps: in the step S1, the hydraulic system adopts a servo hydraulic system, the detection mechanism feeds back actual position data of the detected left and right copper plates to the servo system, the servo system compares the actual position data with the set position data, and drives the left and right copper plates through the traversing device, so that the copper plate position is always kept at the set position, thereby realizing closed-loop control of the position of the left and right copper plates, detecting pressures generated on the side walls of the copper plates by different steel types, different casting durations and molten steel temperature differences, comparing the actual pressure with the set pressure, and controlling the position of the traversing mechanism through the servo system, so that the pressure is kept at the set value, thereby realizing double closed-loop control of the position and the pressure.
3. The method for adjusting the thickness of the flanges of the beam blank in the rolling process of the large-sized H-shaped steel according to claim 1, wherein the method comprises the following steps: in the step S2, the traversing device adopts a mode that the AGC servo hydraulic cylinder directly drives the left copper plate and the right copper plate, and meanwhile, in order to ensure that the AGC hydraulic cylinder is in gapless connection with the copper plates, a piston rod of the AGC hydraulic cylinder is closed on the side surface of the copper plate through a pressing disc, and a heat insulation plate is arranged at the joint.
4. The method for adjusting the thickness of the flanges of the beam blank in the rolling process of the large-sized H-shaped steel according to claim 1, wherein the method comprises the following steps: the detection mechanism in the step S3 mainly detects the position of the left and right copper plates and the pressure of the molten steel on the action copper plate during casting, the position detection is directly detected by a hysteresis displacement sensor arranged on the AGC hydraulic cylinder, the accuracy of the sensor can reach 0.002mm, the pressure detection is indirectly detected by an oil pressure sensor arranged on the AGC hydraulic cylinder and combining with the cylinder diameter parameter of the AGC hydraulic cylinder, and the pressure detection is converted into a pressure value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011568621.1A CN112872026A (en) | 2020-12-25 | 2020-12-25 | Method for adjusting thickness of special-shaped blank flange in large-scale H-shaped steel rolling process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011568621.1A CN112872026A (en) | 2020-12-25 | 2020-12-25 | Method for adjusting thickness of special-shaped blank flange in large-scale H-shaped steel rolling process |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6083743A (en) * | 1983-10-13 | 1985-05-13 | Nippon Steel Corp | Casting mold for continuous casting of beam blank |
| EP1486273A1 (en) * | 2003-06-14 | 2004-12-15 | SMS Demag Aktiengesellschaft | Continuous casting mould with adjusting device for the copper plates enclosing the casting cavity |
| US20080179036A1 (en) * | 2007-01-26 | 2008-07-31 | Nucor Corporation | Continuous steel slab caster and methods using same |
| CN102151808A (en) * | 2011-04-22 | 2011-08-17 | 马鞍山钢铁股份有限公司 | Water cooling channel for large beam blank continuous casting crystallizer |
| CN102310169A (en) * | 2011-09-27 | 2012-01-11 | 中冶南方工程技术有限公司 | Method for improving special-shaped blank continuous casting crystallizer cooling effect and crystallizer |
-
2020
- 2020-12-25 CN CN202011568621.1A patent/CN112872026A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6083743A (en) * | 1983-10-13 | 1985-05-13 | Nippon Steel Corp | Casting mold for continuous casting of beam blank |
| EP1486273A1 (en) * | 2003-06-14 | 2004-12-15 | SMS Demag Aktiengesellschaft | Continuous casting mould with adjusting device for the copper plates enclosing the casting cavity |
| US20080179036A1 (en) * | 2007-01-26 | 2008-07-31 | Nucor Corporation | Continuous steel slab caster and methods using same |
| CN102151808A (en) * | 2011-04-22 | 2011-08-17 | 马鞍山钢铁股份有限公司 | Water cooling channel for large beam blank continuous casting crystallizer |
| CN102310169A (en) * | 2011-09-27 | 2012-01-11 | 中冶南方工程技术有限公司 | Method for improving special-shaped blank continuous casting crystallizer cooling effect and crystallizer |
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Application publication date: 20210601 |
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