CN102773271A - Temperature equalizing device and temperature equalizing method for hot-rolling H-shaped steel - Google Patents
Temperature equalizing device and temperature equalizing method for hot-rolling H-shaped steel Download PDFInfo
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- CN102773271A CN102773271A CN201210191234XA CN201210191234A CN102773271A CN 102773271 A CN102773271 A CN 102773271A CN 201210191234X A CN201210191234X A CN 201210191234XA CN 201210191234 A CN201210191234 A CN 201210191234A CN 102773271 A CN102773271 A CN 102773271A
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Abstract
The invention provides a temperature equalizing device and a temperature equalizing method for hot-rolling an H-shaped steel. The temperature equalizing device comprises a guide plate and an air hole, wherein the guide plate is connected to a beam of a rolling machine and is arranged above the web plate of the steel blank of the H-shaped steel and is used for guiding the transmission of the steel blank of the H-shaped steel; and the air hole is formed by passing through the guide plate and is connected with a pipeline of an outer compressed air source so as to waft the compressed air to the middle of the web plate of the steel blank of the H-shaped steel which is arranged under the guide plate. The air is wafted to the middle of the upper surface of the web plate of the H-shaped steel by the air hole formed on the guide plate, so that the roller cooling water stacked on the web plate is apart to R-angle parts which are arranged at two sides of the H-shaped steel, and therefore, the contact between the web plate and the cooling water is effectively reduced, the cooling speed of the web plate is slowed down, the temperature difference between the web plate and a flange is reduced, and various problems caused by overlarge temperature difference are radically solved.
Description
Technical field
The present invention relates to the metal hot processing field, more particularly, relate to a kind of hot rolled H-shaped temperature equalization system and a kind of hot rolled H-shaped temperature equalizing method.
Background technology
H shaped steel is a kind of economical section steel, has the advantage that modulus of section is big, in light weight, save metal, is widely used in every field such as industry, building, bridge, oil drilling platform.The production of H shaped steel and the history in existing more than 100 year of application, production specification covers (50-900) * (50-400) mm.It is hot rolled H-shaped that France in 1876 begins to adopt universal mill to produce, and 20 beginnings of the century, formed the ripe hot rolled H-shaped production technology of roughing+omnipotent (back and forth) tandem rolling gradually.Because the H beam steel shape is comparatively complicated, carries out smoothly for what guarantee to produce, on milling train entrance and exit crossbeam, guide and guards is installed usually, guiding H shaped steel passes in and out milling train smoothly.As shown in Figure 1, in the operation of rolling, roll cooling water 3 can flow on the upper surface of web 5 of H shaped steel 2 along the roll barrel surface, but because the obstruction of two side wing edges 4, the water that flows on the web 5 can't be drained.Existing hot rolled H-shaped guide and guard 1 also can't stop and contact on cooling water and the web or cooling water is drained as early as possible, thereby cooling water can be assembled at web 5 upper surfaces.The web 5 of H shaped steel 2 temperature under the cooling effect of water descends fast, and therefore the temperature difference with the edge of a wing 4 continues to increase, and can reach 50-100 ℃.Big specification H shaped steel is because web is wide, and rolling pass is many, the cooling water long action time, and the temperature difference is bigger, and the high energy of the temperature difference between omnipotent (back and forth) tandem rolling end trailing web 5 and the edge of a wing 4 reaches more than 200 ℃.Web and edge of a wing excessive temperature differentials mainly cause three aspect problems: (1) because web temperature is low excessively, rolling load increases and roll wear obviously increases, and has increased production cost; (2) the huge temperature difference not only makes structure property uneven, and causes forming bigger residual stress between the web and the edge of a wing, reduces the bearing capacity of H shaped steel greatly; (3) excessive temperature differentials causes the asynchronous cooling with the edge of a wing of web, causes that H shaped steel web forms wave and causes waste product, reduces lumber recovery.For many years, temperature difference problem is perplexing each particularly big specification H shaped steel manufacturing enterprise of H shaped steel manufacturing enterprise always.
Summary of the invention
One object of the present invention is to provide a kind of hot rolled H-shaped temperature equalization system that can prevent excessive temperature differentials between the hot rolled H-shaped web and the edge of a wing.
Another object of the present invention is to provide a kind of hot rolled H-shaped web and hot rolled H-shaped temperature equalizing method of the temperature difference between the edge of a wing of reducing.
To achieve these goals, the object of the present invention is to provide a kind of hot rolled H-shaped temperature equalization system, this temperature equalization system comprises: guided plate is connected to the milling train crossbeam, and is installed on the web of H shaped steel steel billet, with the transmission of guiding H shaped steel steel billet; Pore penetrates guided plate and forms, and be connected with the pipeline of external compression source of the gas, so that the middle part of Compressed Gas towards the web of the H shaped steel steel billet under guided plate blowed.
Said guided plate can be the plate of defending of rolling mill guiding.
Said temperature equalization system also can comprise brace rod, and this brace rod is connected on the guided plate vertically, and is fixedly connected with the milling train crossbeam.
Said brace rod can comprise that setting is connected a pair of brace rod on the guided plate symmetrically.
Said pore can be a plurality of pores.
Said a plurality of pore can be formed on the center of the width of guided plate, and is arranged in a linear along the length direction of guided plate.
The quantity of said a plurality of pores can be between 2 to 15.
The quantity of said a plurality of pores can be between 3 to 8.
Pore can be circle, and the diameter of pore is between 15mm to 100mm.
Pore can be circle, and the diameter of pore is between 20mm to 80mm.
In the exit of pore, the pressure of the gas that blows can be controlled in 0.1 crust to the scope of 10 crust.
In the exit of pore, the pressure of the gas that blows can be controlled in 0.2 crust to the scope of 5 crust.
According to a further aspect in the invention, a kind of temperature equalizing method that utilizes above-mentioned hot rolled H-shaped temperature equalization system is provided also, said comprising the steps: is connected the pore of temperature equalization system with the pipeline of compressed gas source; At H shaped steel steel billet during through the guided plate of temperature equalization system, the Compressed Gas of control compressed gas source blows to the middle part of the web of H shaped steel steel billet through pore, blows the H shaped steel R angular position to the web both sides with the roll cooling water that the web upper surface is accumulated.
According to hot rolled H-shaped temperature equalization system of the present invention and temperature equalizing method; Through be formed on pore on the guided plate with air blown in the middle of the H shaped steel web upper surface, under the winding-up effect, make the roll cooling water that accumulates on the web be separated into the H shaped steel R angular position of both sides; Effectively reduced contacting of web and cooling water; Slowed down the cooling velocity of web, dwindled the temperature difference on the web and the edge of a wing, fundamentally solved because the variety of issue that excessive temperature differentials brings.
Description of drawings
Through the description of carrying out below in conjunction with accompanying drawing, above-mentioned and other purposes of the present invention and characteristics will become apparent, wherein:
Fig. 1 is the sketch map that the distribution of cooling water on hot rolled H-shaped web in the prior art is shown;
Fig. 2 is the sketch map that illustrates according to the hot rolled H-shaped temperature equalization system of the first embodiment of the present invention;
Fig. 3 is the sketch map that is illustrated in the distribution of cooling water on hot rolled H-shaped web under the situation of the hot rolled H-shaped temperature equalization system of using the first embodiment of the present invention;
Fig. 4 is the sketch map that hot rolled H-shaped temperature equalization system according to a second embodiment of the present invention is shown.
The specific embodiment
Below, specify embodiments of the invention with reference to accompanying drawing.
As shown in Figures 2 and 3, the hot rolled H-shaped temperature equalization system 10 according to the first embodiment of the present invention comprises: brace rod 12 is connected with the milling train crossbeam; Guided plate 13 is connected with brace rod 12 basically orthogonally, and is set on the web of rolling H shaped steel steel billet, and to the conveying channeling conduct of H shaped steel steel billet; Pore 14 penetrates guided plate 13 and forms, and pore 14 connects with the gas pipeline (not shown) of high-pressure air source (for example, compressed air), so that the web 5 of gases at high pressure towards hot rolled H-shaped 2 blowed.
Preferably, brace rod 12 is respect to one another a pair of, is arranged on symmetrically on the guided plate 13.On the one hand, brace rod 12 can be fixed to the milling train crossbeam with temperature equalization system 10, can improve the rigidity of guided plate 14 on the other hand.Though described temperature equalization system 10 in the first embodiment of the present invention with brace rod 12 and guided plate 13, also can omit brace rod 13, that is, guided plate 13 can directly be connected with the crossbeam of milling train.
On web 5, gather cooling water 3 hot rolled H-shaped 2 from the below of temperature equalization system 10 through out-of-date; Gas from high-pressure air source blows through the middle part of pore 14 towards web 6; Thereby the roll cooling water that on web 5, accumulates is separated into hot rolled H-shaped 2 R angular position, both sides 6; Effectively reduced contacting of web 5 and cooling water 3; Thereby delayed the cooling velocity of web 5, thereby the cooling velocity of hot rolled H-shaped 2 web 5 and R angular position, both sides 6 is tending towards synchronously, so that the temperature difference between hot rolled H-shaped 2 the different parts reduces.
Preferably, hot rolled H-shaped according to an embodiment of the invention temperature equalization system 10 can be a rolling mill guiding.That is to say that brace rod 12 can be fixedly connected to the crossbeam of milling train, guided plate 13 then constitutes the plate of defending of guide and guard, is used to guide H shaped steel steel billet to get into milling train reposefully.As shown in Figure 2, on brace rod 12, be formed with fixed pin holes 11, through the crossbeam that pin is passed brace rod 12 and milling train hot rolled H-shaped temperature equalization system is connected on the crossbeam of milling train.In addition, the crossbeam of brace rod 12 and milling train also can be permanently connected for example bolt connection, welding etc. through alternate manner.The guide and guard that play guiding function through the transmission that makes H shaped steel steel billet can realize the samming of steel billet is handled under the situation that does not change rolling process simultaneously as temperature equalization system, kill two birds with one stone.
Preferably, pore 14 can be positioned at the centre of guided plate 13 widths.For guided plate or defend the situation that plate 13 directly is connected with the crossbeam of milling train, pore 14 passes guided plate flexiblely or defends plate 13, and the centre that only need make the outlet of pore 14 be positioned at guided plate 13 widths gets final product.As shown in Figure 1, the quantity of pore is 5.As shown in Figure 4, in hot rolled H-shaped temperature equalization system 20 according to a second embodiment of the present invention, the quantity of pore 24 is 3, and the structure of brace rod 22 and guided plate 23 is identical with corresponding component among first embodiment.
Yet, the invention is not restricted to this, the quantity of pore 14 and size can be according to hot rolled H-shaped sizes and are different.On the whole, the quantity of pore can be between 2-15, preferably between 3-8.When pore 14 was toroidal, its diameter was between 15mm to 100mm, preferably between 20mm to 80mm.When the quantity of pore 14 when being a plurality of, pore 14 can be arranged along the length direction of guided plate 13.
Different according to the size of pore 14 and quantity, the gas pressure in pore 14 exits can change differently.Generally speaking, the gas pressure in the exit of pore 14 can remain on 0.1 crust to the scope of 10 crust, and preferably, the gas pressure in the exit of pore 14 can remain on 0.2 crust to the scope of 5 crust.
Some examples about the gas pressure in the quantity of pore 14 and size and pore 14 exits will be provided below.
Example 1
Example 2
Example 3
Example 4
Example 5
Example 6
Though itemized some examples above about the gas pressure in the quantity of pore 14 and size and pore 14 exits; But above-mentioned example only is exemplary; Jet to hot rolled H-shaped 2 web 5 upper surfaces through pore 14 as long as have the air of certain pressure, the H shaped steel R angular position 6 that the roll cooling water 3 that can the upper surface of web 5 be accumulated blows to the web both sides gets final product.The shape of pore 14 also is not limited to circle, for example, can be different shapes such as strip, square, triangle, ellipse, rhombus.
To the temperature equalizing method of use according to the hot rolled H-shaped temperature equalization system of exemplary embodiment of the present invention be described with reference to Fig. 3 below.
As shown in Figure 3; When using hot rolled H-shaped temperature equalization system according to exemplary embodiment of the present invention to carry out samming when handling; Pore 14 external compressed air pipelines; H shaped steel 2 through temperature equalization systems 10 below in, compressed air is through the upper surface winding-up of pore 14 to the web 5 of H shaped steel, the roll cooling water 3 that the upper surface of web 5 is accumulated blows to the H shaped steel R angular position 6 of web both sides.
Description through top is clear that; Through be formed on pore on the guided plate with air blown in the middle of the H shaped steel web upper surface, under the winding-up effect, make the roll cooling water that accumulates on the web be separated into the H shaped steel R angular position of both sides; Effectively reduced contacting of web and cooling water; Slowed down the cooling velocity of web, dwindled the temperature difference on the web and the edge of a wing, fundamentally solved because the variety of issue that excessive temperature differentials brings.
The present invention also can be through improving the existing omnipotent guide and guard of H shaped steel, thereby do not increase H shaped steel production link, do not increase the technology controlling and process step,, realized hot rolled H-shaped equal temperature control under certain condition.Through in the universal mill guide and guard, arranging pore, utilize the purging effect of air, make air pass through pore and jet to H shaped steel web upper surface.Under the pressure of setting; The air of pore winding-up is separated into cooling water the web both sides and remains on the R angular position; Can reduce the web cooling velocity through reducing cooling water with contacting of web; Improve the web rolling temperature, dwindle the temperature difference between the web and the edge of a wing, can fundamentally solve because the variety of issue that excessive temperature differentials brings.That is to say that temperature equalization system provided by the invention can not only accurately guide H shaped steel turnover milling train, and can effectively reduce contacting of cooling water and H shaped steel web, dwindle the web and the edge of a wing temperature difference.
The invention is not restricted to the foregoing description, without departing from the present invention, can carry out various distortion and modification.
Claims (13)
1. a hot rolled H-shaped temperature equalization system is characterized in that, this temperature equalization system comprises:
Guided plate is connected to the milling train crossbeam, and is installed on the web of H shaped steel steel billet, with the transmission of guiding H shaped steel steel billet;
Pore penetrates guided plate and forms, and be connected with the pipeline of external compression source of the gas, so that the middle part of Compressed Gas towards the web of the H shaped steel steel billet under guided plate blowed.
2. hot rolled H-shaped temperature equalization system as claimed in claim 1 is characterized in that, said guided plate is the plate of defending of rolling mill guiding.
3. hot rolled H-shaped temperature equalization system as claimed in claim 1 is characterized in that, said temperature equalization system also comprises:
Brace rod is connected on the guided plate vertically, and is fixedly connected with the milling train crossbeam.
4. hot rolled H-shaped temperature equalization system as claimed in claim 3 is characterized in that, said brace rod comprises that setting is connected a pair of brace rod on the guided plate symmetrically.
5. hot rolled H-shaped temperature equalization system as claimed in claim 1 is characterized in that, said pore is a plurality of pores.
6. hot rolled H-shaped temperature equalization system as claimed in claim 5 is characterized in that said a plurality of pores are formed on the center of the width of guided plate, and is arranged in a linear along the length direction of guided plate.
7. hot rolled H-shaped temperature equalization system as claimed in claim 5 is characterized in that, the quantity of said a plurality of pores is between 2 to 15.
8. hot rolled H-shaped temperature equalization system as claimed in claim 5 is characterized in that, the quantity of said a plurality of pores is between 3 to 8.
9. hot rolled H-shaped temperature equalization system as claimed in claim 5 is characterized in that, pore is circular, and the diameter of pore is between 15mm to 100mm.
10. hot rolled H-shaped temperature equalization system as claimed in claim 5 is characterized in that, pore is circular, and the diameter of pore is between 20mm to 80mm.
11. hot rolled H-shaped temperature equalization system as claimed in claim 1 is characterized in that, in the exit of pore, the pressure of the gas that blows is controlled in 0.1 crust to the scope of 10 crust.
12. hot rolled H-shaped temperature equalization system as claimed in claim 1 is characterized in that, in the exit of pore, the pressure of the gas that blows is controlled in 0.2 crust to the scope of 5 crust.
13. the temperature equalizing method of each the described hot rolled H-shaped temperature equalization system in utilization such as the claim 1 to 12 is characterized in that comprising the steps:
The pore of temperature equalization system is connected with the pipeline of compressed gas source;
At H shaped steel steel billet during through the guided plate of temperature equalization system, the Compressed Gas of control compressed gas source blows to the middle part of the web of H shaped steel steel billet through pore, blows the H shaped steel R angular position to the web both sides with the roll cooling water that the web upper surface is accumulated.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210191234.XA CN102773271B (en) | 2012-06-12 | 2012-06-12 | Temperature equalizing device and temperature equalizing method for hot-rolling H-shaped steel |
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| CN201210191234.XA CN102773271B (en) | 2012-06-12 | 2012-06-12 | Temperature equalizing device and temperature equalizing method for hot-rolling H-shaped steel |
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| CN102773271A true CN102773271A (en) | 2012-11-14 |
| CN102773271B CN102773271B (en) | 2014-12-31 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024016543A1 (en) * | 2022-07-20 | 2024-01-25 | 山东钢铁股份有限公司 | High-strength and high-toughness hot-rolled h-shaped steel for building and preparation method therefor |
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| CN1120980A (en) * | 1994-10-19 | 1996-04-24 | 曼内斯曼股份公司 | Method and apparatus for preventing section of steel beam from being unparall |
| JP2003213324A (en) * | 2002-01-17 | 2003-07-30 | Toyota Motor Corp | Method for quenching metallic member |
| CN101249518A (en) * | 2008-03-24 | 2008-08-27 | 莱芜钢铁股份有限公司 | Alternating expression guide device |
| CN102029296A (en) * | 2010-09-30 | 2011-04-27 | 安徽工业大学 | Method for fast cooling low-carbon hot-rolling small H-shaped steel |
| CN202667284U (en) * | 2012-06-12 | 2013-01-16 | 莱芜钢铁集团有限公司 | Temperature equalizing device for hot rolling of H-shaped steel |
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2012
- 2012-06-12 CN CN201210191234.XA patent/CN102773271B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1120980A (en) * | 1994-10-19 | 1996-04-24 | 曼内斯曼股份公司 | Method and apparatus for preventing section of steel beam from being unparall |
| JP2003213324A (en) * | 2002-01-17 | 2003-07-30 | Toyota Motor Corp | Method for quenching metallic member |
| CN101249518A (en) * | 2008-03-24 | 2008-08-27 | 莱芜钢铁股份有限公司 | Alternating expression guide device |
| CN102029296A (en) * | 2010-09-30 | 2011-04-27 | 安徽工业大学 | Method for fast cooling low-carbon hot-rolling small H-shaped steel |
| CN202667284U (en) * | 2012-06-12 | 2013-01-16 | 莱芜钢铁集团有限公司 | Temperature equalizing device for hot rolling of H-shaped steel |
Non-Patent Citations (1)
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| 周光理: "热轧H型钢腹板偏心原因分析及改进措施", 《轧钢》, vol. 20, no. 5, 31 October 2003 (2003-10-31) * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024016543A1 (en) * | 2022-07-20 | 2024-01-25 | 山东钢铁股份有限公司 | High-strength and high-toughness hot-rolled h-shaped steel for building and preparation method therefor |
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