Finishing mill structure for controlling deformation of rapid cooling flange of hot-rolled H-shaped steel after rolling

Abstract

The invention belongs to the technical field of steel rolling section steel, and relates to a finishing mill structure for controlling deformation of a rapid cooling flange of hot-rolled H-shaped steel after rolling. The upper horizontal roller (1) comprises an upper horizontal roller rolling end (2), and the inclination of an upper horizontal roller side working face (3) of the upper horizontal roller rolling end (2) and a vertical line (4) ranges from 0.7 degree to 2.5 degrees. The lower horizontal roller (5) comprises a lower horizontal roller rolling end (6), and the inclination of a lower horizontal roller side working face (7) of the lower horizontal roller rolling end (6) and the vertical line (4) ranges from 0.7 degree to 2.5 degrees. According to the finishing mill structure for controlling the rapid cooling flange deformation of the hot-rolled H-shaped steel after rolling, the hot-rolled H-shaped steel with the flange free of obvious deformation after water penetrating is produced under the large-scale production condition; and the boundary dimension requirement of the high-strength hot-rolled H-shaped steel is met.

Description

Technical Field

[0001] The invention belongs to the technical field of steel rolling, and more specifically, relates to a finishing mill structure for controlling flange deformation of hot-rolled H-shaped steel after rapid cooling. Background Art

[0002] The application field of H-shaped steel is constantly expanding, and has expanded from the steel structure industry to the machinery industry, special railway vehicles, offshore oil platforms and other fields. As low-carbon emission reduction becomes the mainstream of the steel industry, the use of high-strength steel is becoming more and more common. In the production process of H-shaped steel, due to the limitations of carbon equivalent and billet shape, it is difficult to achieve high strength requirements from the perspective of alloy design alone. It is necessary to combine controlled rolling and controlled cooling technology. There are many international and domestic standards for H-shaped steel, and the specification span is large. In order to achieve high strength, some specifications have serious flange deformation after water penetration, and cannot be straightened by a straightener. From an economic perspective, replacing special-shaped billets with slabs can solve the problem caused by insufficient compression ratio, but the investment increases greatly. Therefore, it is urgent to find a rolling mill structure and method to control the deformation of the flange of hot-rolled H-shaped steel after water penetration to meet the application needs of producing high-strength steel series of different specifications.

[0003] (1) The application with announcement number CN218881330U and titled “High-strength, anti-deformation welded H-beam” mainly adopts tungsten alloy as the material of the reinforcement layer, which has the advantages of high density, good machinability and high strength, thereby improving the internal strength of the welded H-beam. The main material of the buffer layer is beryllium copper alloy, which has high elasticity and fatigue resistance. At the same time, the honeycomb structure ensures the overall strength of the welded H-beam and increases the load-bearing capacity of the welded H-beam, thereby preventing the welded H-beam from deforming and breaking due to long-term load-bearing.

[0004] (2) The invention patent with announcement number CN117988442A and titled “An H-beam anti-deformation device and method thereof” discloses an H-beam anti-deformation device and method thereof. The patent mainly uses a movable bracket, a supporting bracket and a wedge-shaped bracket to reinforce the flange at the node of the H-beam, which can effectively prevent the deformation of the flange of the H-beam and increase the load-bearing capacity of the H-beam; the total length of the movable bracket and the supporting bracket can be conveniently adjusted through a pushing mechanism, so as to facilitate the connection of the movable bracket and the supporting bracket to the flange at the node of the H-beam, which is easy to operate.

[0005] In the above-mentioned Patent Document 1, welding H-beams and deformation correction equipment are mainly introduced, and in Patent Document 2, mobile support brackets are mainly used to prevent deformation of H-beams after production in actual use; therefore, this technology does not involve the technical problems and technical solutions of the present application. Summary of the invention

[0006] The technical problem to be solved by the present invention is: in view of the shortcomings of the prior art, a finishing mill structure with a simple structure is provided to produce hot-rolled H-shaped steel without obvious deformation of the flange after passing through water under large-scale production conditions, so as to meet the requirements of the external dimensions of high-strength hot-rolled H-shaped steel and control the deformation of the flange of the hot-rolled H-shaped steel after rapid cooling after rolling.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is:

[0008] The present invention discloses a finishing mill structure for controlling flange deformation of hot-rolled H-shaped steel after rapid cooling. The upper horizontal roll comprises an upper horizontal roll rolling end, and the inclination of the upper horizontal roll side working surface of the upper horizontal roll rolling end to the vertical line is in the range of 0.7° to 2.5°; the lower horizontal roll comprises a lower horizontal roll rolling end, and the inclination of the lower horizontal roll side working surface of the lower horizontal roll rolling end to the vertical line is in the range of 0.7° to 2.5°; the vertical roll comprises a vertical roll rolling end, and the inclination of the vertical roll end working surface of the vertical roll rolling end to the vertical line is in the range of 0.7° to 2.5°.

[0009] The vertical rollers include a first vertical roller and a second vertical roller. The slope of the vertical roller end working surface at the vertical roller rolling end of the first vertical roller and the vertical line is in the range of 0.7° to 2.5°. The slope of the vertical roller end working surface at the vertical roller rolling end of the second vertical roller and the vertical line is in the range of 0.7° to 2.5°.

[0010] The first vertical roll and the second vertical roll are arranged symmetrically, the first vertical roll is arranged on one side of the upper horizontal roll side working surface on the left side of the upper horizontal roll rolling end and the lower horizontal roll side working surface on the left side of the lower horizontal roll rolling end, and the second vertical roll is arranged on the other side of the upper horizontal roll side working surface on the right side of the upper horizontal roll rolling end and the lower horizontal roll side working surface on the right side of the lower horizontal roll rolling end.

[0011] The slope of the upper horizontal roller side working surface at the upper horizontal roller rolling end of the upper horizontal roller and the horizontal line is in the range of 87.5° to 89.3°; the slope of the lower horizontal roller side working surface at the lower horizontal roller rolling end of the lower horizontal roller and the horizontal line is in the range of 87.5° to 89.3°.

[0012] The slope of the lower horizontal roll side working surface of the vertical roll rolling end of the first vertical roll and the horizontal line is in the range of 87.5° to 89.3°, and the slope of the lower horizontal roll side working surface of the vertical roll rolling end of the second vertical roll and the horizontal line is in the range of 87.5° to 89.3°.

[0013] The cross-section of the side working surface of the vertical roll at the vertical roll rolling end of the first vertical roll is a convex V-shaped structure, and the most convex point is located at the center line of the vertical roll; the cross-section of the side working surface of the vertical roll at the vertical roll rolling end of the second vertical roll is a convex V-shaped structure, and the most convex point is located at the center line of the vertical roll.

[0014] As Example 1, when rolling hot-rolled H-shaped steel of specifications of 630×200×15×20, the inclination of the upper horizontal roll side working surface of the upper horizontal roll rolling end of the upper horizontal roll and the horizontal line is 89.3°; the inclination of the lower horizontal roll side working surface of the lower horizontal roll rolling end of the lower horizontal roll and the horizontal line is in the range of 89.3°; the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the first vertical roll and the horizontal line is 89.3°, and the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the second vertical roll and the horizontal line is in the range of 89.3°. 89.3°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in a heating furnace, the surface oxide scale is removed by a dephosphorization machine, and then the billet enters the billet opening machine for 9-15 reciprocating rolling in different pass types, the rolled piece enters the universal rough rolling mill for 1-9 reciprocating rolling, and the H-beam is rolled in the finishing mill for the last pass; after leaving the finishing mill, water is pierced, the opening of the side baffle is 1130mm, the number of water nozzles is 1-10 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product has no deformation after water piercing, and the flange inclination meets the standard requirements.

[0015] As Example 2, when rolling a hot-rolled H-shaped steel of 630×200×15×20 specifications, the slope of the upper horizontal roll side working surface of the upper horizontal roll rolling end 2 of the upper horizontal roll and the horizontal line is 87.5°; the slope of the lower horizontal roll side working surface of the lower horizontal roll rolling end of the lower horizontal roll and the horizontal line is in the range of 87.5°; the slope of the lower horizontal roll side working surface of the vertical roll rolling end of the first vertical roll and the horizontal line is 87.5°, and the slope of the lower horizontal roll side working surface 10 of the vertical roll rolling end of the second vertical roll and the horizontal line 13 is in the range of 8 7.5°; The continuous casting special-shaped billet is heated to 1200℃-1280℃ in a heating furnace, and the surface oxide scale is removed by a dephosphorization machine. It enters the billet opening machine for 9-15 reciprocating rolling in different pass types, and the rolled piece enters the universal rough rolling mill for 1-9 reciprocating rolling. The H-shaped steel is rolled in the finishing mill for the last pass, and is water-pierced after leaving the finishing mill. The opening of the side baffle is 1100mm-1140mm, the number of water nozzles is 1-10 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product has no deformation after water penetration, and the flange inclination meets the standard requirements.

[0016] As Example 3, when rolling hot-rolled H-shaped steel of specifications 488×300×11×18, the inclination of the upper horizontal roll side working surface of the upper horizontal roll rolling end of the upper horizontal roll and the horizontal line is 88.6°; the inclination of the lower horizontal roll side working surface of the lower horizontal roll rolling end of the lower horizontal roll and the horizontal line is in the range of 88.6°; the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the first vertical roll and the horizontal line is 88.6°, and the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the second vertical roll and the horizontal line is 88.6°. .6°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in a heating furnace, the surface oxide scale is removed by a dephosphorizer, and then it enters the billet opening machine for 9-15 reciprocating rolling in different hole types, the rolled piece enters the universal rough rolling mill for 1-7 reciprocating rolling, and the H-beam is rolled for the last pass in the finishing mill; after leaving the finishing mill, it is pierced with water, the opening of the side baffle is 990mm-1030mm, the number of water nozzles is 1-8 groups, the water pressure is 1.2MPa-1.5MPa, and there is no deformation of the product flange after water penetration, and the flange inclination meets the standard requirements.

[0017] As Example 4, when rolling hot-rolled H-shaped steel of specification 305×305×223, the inclination of the upper horizontal roll side working surface of the upper horizontal roll rolling end of the upper horizontal roll and the horizontal line is 88.2°; the inclination of the lower horizontal roll side working surface of the lower horizontal roll rolling end of the lower horizontal roll and the horizontal line is in the range of 88.2°; the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the first vertical roll and the horizontal line is 88.2°, and the inclination of the lower horizontal roll side working surface of the vertical roll rolling end of the second vertical roll and the horizontal line 13 is in the range of 88.2°. .2°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in a heating furnace, the surface oxide scale is removed by a dephosphorizer, and then it enters the billet opening machine for 9-15 reciprocating rolling in different hole types, the rolled piece enters the universal rough rolling mill for 1-7 reciprocating rolling, and the H-beam is rolled for the last pass in the finishing mill; after leaving the finishing mill, it is pierced with water, the opening of the side baffle is 900mm-960mm, the number of water nozzles is 1-21 groups, the water pressure is 1.2MPa-1.5MPa, and there is no deformation of the flange of the product after water piercing, and the flange inclination meets the standard requirements.

[0018] The technical solution of the present invention is adopted, and the working principle and beneficial effects are as follows:

[0019] The finishing mill structure for controlling the deformation of the flange of the hot-rolled H-shaped steel after rapid cooling after rolling of the present invention is improved in the local structure of the rolling mill during the structural setting. Specifically, the structure of the upper horizontal roller, the lower horizontal roller and the vertical roller is improved so that the side working surface of the upper horizontal roller at the rolling end of the upper horizontal roller forms an inclination within a specific range with the vertical line; the side working surface of the lower horizontal roller at the rolling end of the lower horizontal roller forms an inclination within a specific range with the vertical line; the end working surface of the vertical roller at the rolling end of the vertical roller forms an inclination within a specific range with the vertical line. In this way, in the rolling process of H-shaped steel of different specifications, the heating temperature of the continuous casting special-shaped blank passing through the heating furnace is controlled, the surface oxide scale is removed by the dephosphorization machine, the blank is reciprocated and rolled in the blanking machine, the rolled piece is reciprocated and rolled in the roughing mill, the H-shaped steel is rolled in the finishing mill for the last pass, and water is pierced after leaving the rolling mill, the side baffle opening degree is controlled, the number of water nozzles is controlled, and the water pressure is controlled to improve the quality of the product after rolling. After water piercing, the flange of the product is not deformed, and the flange inclination meets the standard requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The following is a brief description of the contents and symbols in the drawings of this specification:

[0021] Figure 1 It is a schematic structural diagram of a finishing mill structure for controlling flange deformation of hot-rolled H-shaped steel after rapid cooling after rolling according to the present invention;

[0022] Markings in the attached drawing are: 1. upper horizontal roller; 2. rolling end of upper horizontal roller; 3. side working surface of upper horizontal roller; 4. vertical line; 5. lower horizontal roller; 6. rolling end of lower horizontal roller; 7. side working surface of lower horizontal roller; 8. vertical roller; 9. rolling end of vertical roller; 10. end working surface of vertical roller; 11. first vertical roller; 12. second vertical roller; 13. horizontal line; 14. center line of vertical roller. DETAILED DESCRIPTION

[0023] The following is a further detailed description of the specific implementation of the present invention, such as the shape, structure, mutual position and connection relationship between the various components involved, the function and working principle of each part, etc., through the description of the embodiments with reference to the accompanying drawings:

[0024] As attached Figure 1As shown, the present invention is a finishing mill structure for controlling the deformation of the flange of the hot-rolled H-shaped steel after rapid cooling. The upper horizontal roll 1 includes an upper horizontal roll rolling end 2, and the slope of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 and the vertical line 4 is in the range of 0.7° to 2.5°; the lower horizontal roll 5 includes a lower horizontal roll rolling end 6, and the slope of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 and the vertical line 4 is in the range of 0.7° to 2.5°; the vertical roll 8 includes a vertical roll rolling end 9, and the slope of the vertical roll end working surface 10 of the vertical roll rolling end 9 and the vertical line 4 is in the range of 0.7° to 2.5°. The above structure proposes an improved technical solution to the deficiencies in the prior art. When setting the structure, the local structure of the finishing mill is improved, specifically, the structure of the upper horizontal roll 1, the lower horizontal roll 5, and the vertical roll 8 is improved, so that the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 forms an inclination within a specific range with the vertical line 4; the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 forms an inclination within a specific range with the vertical line 4; the vertical roll end working surface 10 of the vertical roll rolling end 9 forms an inclination within a specific range with the vertical line 4. In this way, in the rolling process of H-shaped steel of different specifications, the heating temperature of the continuous casting special-shaped billet passing through the heating furnace is controlled, the surface oxide scale is removed by the dephosphorization machine, and the billet enters the billet opening machine for reciprocating rolling, the rolled piece enters the rough rolling machine for reciprocating rolling, and the H-shaped steel is rolled in the finishing mill for the last pass, and water is pierced after leaving the finishing mill, and the side baffle opening degree, the number of water nozzles, and the water pressure are controlled to improve the quality of the product after rolling. After water piercing, the flange of the product is not deformed, and the flange inclination meets the standard requirements. The finishing mill structure for controlling the deformation of the flange of the hot-rolled H-shaped steel after rapid cooling after rolling described in the present invention has a simple structure and can produce hot-rolled H-shaped steel without obvious deformation of the flange after passing through water under large-scale production conditions, so as to meet the external dimension requirements of high-strength hot-rolled H-shaped steel. The H-shaped steel is in an "H" shape during rolling, and is rapidly cooled after being rolled by the finishing mill. Since the outer side of the flange is in direct contact with the rapid cooling medium, the cooling rate is greater than the inner side of the flange. After cooling, the flange will deform in the inner direction of the flange. By modifying the inclination of the finishing mill roll, the flange of the rolled piece exiting the finishing mill is slightly in the outer direction of the flange at a certain angle to the vertical line. After rapid cooling, the deformation of the flange in the inner direction and the initial outward inclination just offset each other, so as to meet the requirements of producing hot-rolled H-shaped steel without obvious deformation of the flange after passing through water under large-scale production conditions.

[0025] The vertical roll 8 includes a first vertical roll 11 and a second vertical roll 12. The slope of the vertical roll end working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the vertical line 4 is in the range of 0.7° to 2.5°, and the slope of the vertical roll end working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 and the vertical line 4 is in the range of 0.7° to 2.5°. The first vertical roll 11 and the second vertical roll 12 are arranged symmetrically, the first vertical roll 11 is arranged on one side of the upper horizontal roll side working surface 3 on the left side of the upper horizontal roll rolling end 2 and the lower horizontal roll side working surface 7 on the left side of the lower horizontal roll rolling end 6, and the second vertical roll 12 is arranged on the other side of the upper horizontal roll side working surface 3 on the right side of the upper horizontal roll rolling end 2 and the lower horizontal roll side working surface 7 on the right side of the lower horizontal roll rolling end 6. In the above structure, the upper horizontal roll 1 is located directly above the lower horizontal roll 5, the first vertical roll 11 is arranged on the left side of the upper horizontal roll 1 and the lower horizontal roll 5, and the second vertical roll 12 is arranged on the right side of the upper horizontal roll 1 and the lower horizontal roll 5. The first vertical roll 11 and the second vertical roll 12 are both arranged horizontally. The upper horizontal roll 1, the lower horizontal roll 5, the first vertical roll 11, and the second vertical roll 12 cooperate to complete the finish rolling of the H-beam. After the finish rolling and the water penetration, the flange of the H-beam product has no deformation, and the inclination of the H-beam flange meets the standard requirements.

[0026] The inclination of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 of the upper horizontal roll 1 and the horizontal line 13 is in the range of 87.5° to 89.3°; the inclination of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 of the lower horizontal roll 5 and the horizontal line 13 is in the range of 87.5° to 89.3°. The inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the horizontal line 13 is in the range of 87.5° to 89.3°, and the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 and the horizontal line 13 is in the range of 87.5° to 89.3°. The above structure limits the structure of the upper horizontal roll 1, the lower horizontal roll 5, the first vertical roll 11, and the second vertical roll 12 to meet the requirements for improving product quality.

[0027] The cross section of the side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 is a convex V-shaped structure, and the most protruding point is located at the center line 14 of the vertical roll; the cross section of the side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 is a convex V-shaped structure, and the most protruding point is located at the center line 14 of the vertical roll.

[0028] As Example 1, when rolling a hot-rolled H-shaped steel of 630×200×15×20 specifications, the inclination of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 of the upper horizontal roll 1 and the horizontal line 13 is 89.3°; the inclination of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 of the lower horizontal roll 5 and the horizontal line 13 is in the range of 89.3°; the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the horizontal line 13 is 89.3°, and the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 is 89.3°. The slope of 10 and the horizontal line 13 is 89.3°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in the heating furnace, the dephosphorization machine removes the surface oxidized iron scale, enters the billet opening machine and is rolled back and forth in 9-15 passes of different pass types, the rolled piece enters the universal rough rolling mill for 1-9 passes and the H-beam is rolled in the finishing mill for the last pass; after leaving the finishing mill, it is pierced with water, the side baffle opening is 1130mm, the number of water nozzles is 1-10 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product is not deformed after piercing with water, and the flange slope meets the standard requirements. The above structure can specifically set the slope data within the set range for hot-rolled H-beams of different specifications, thereby further improving the rolling quality of the product and effectively avoiding deformation.

[0029] As Example 2, when rolling hot-rolled H-shaped steel of specifications of 630×200×15×20, the inclination of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 of the upper horizontal roll 1 and the horizontal line 13 is 87.5°; the inclination of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 of the lower horizontal roll 5 and the horizontal line 13 is in the range of 87.5°; the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the horizontal line 13 is 87.5°, and the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 and the horizontal line 13 is 87.5°. The slope of the horizontal line 13 is 87.5°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in the heating furnace, the surface oxide scale is removed by the dephosphorization machine, and the billet enters the billet opening machine for 9-15 reciprocating rolling in different pass types, and the rolled piece enters the universal rough rolling mill for 1-9 reciprocating rolling. The H-shaped steel is rolled in the finishing mill for the last pass, and is water-pierced after leaving the finishing mill. The side baffle opening is 1100mm-1140mm, the number of water nozzles is 1-10 groups, and the water pressure is 1.2MPa-1.5MPa. After water-piercing, the product flange has no deformation, and the flange slope meets the standard requirements. The above structure can specifically set the slope data within the set range for hot-rolled H-shaped steel of different specifications, thereby further improving the rolling quality of the product and effectively avoiding deformation.

[0030] As Example 3, when rolling hot-rolled H-shaped steel of specifications 488×300×11×18, the inclination of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 of the upper horizontal roll 1 and the horizontal line 13 is 88.6°; the inclination of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 of the lower horizontal roll 5 and the horizontal line 13 is in the range of 88.6°; the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the horizontal line 13 is 88.6°, and the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 is 88.6°. The slope with the horizontal line 13 is 88.6°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in the heating furnace, the surface oxide scale is removed by the dephosphorization machine, and then it enters the blanking machine for 9-15 reciprocating rolling in different pass types, and the rolled piece enters the universal rough rolling mill for 1-7 reciprocating rolling, and the H-beam is rolled in the finishing mill for the last pass; after leaving the finishing mill, it is water-pierced, the side baffle opening is 990mm-1030mm, the number of water nozzles is 1-8 groups, the water pressure is 1.2MPa-1.5MPa, and the product flange is not deformed after water-piercing, and the flange slope meets the standard requirements. The above structure can specifically set the slope data within the set range for hot-rolled H-beams of different specifications, thereby further improving the rolling quality of the product and effectively avoiding deformation.

[0031] As Example 4, when rolling hot-rolled H-shaped steel of specification 305×305×223, the inclination of the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 of the upper horizontal roll 1 and the horizontal line 13 is 88.2°; the inclination of the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 of the lower horizontal roll 5 and the horizontal line 13 is in the range of 88.2°; the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the first vertical roll 11 and the horizontal line 13 is 88.2°, and the inclination of the lower horizontal roll side working surface 10 of the vertical roll rolling end 9 of the second vertical roll 12 and the horizontal line 13 is 88.2°. The slope of the horizontal line 13 is 88.2°; the continuous casting special-shaped billet is heated to 1200℃-1280℃ in the heating furnace, the surface oxide scale is removed by the dephosphorization machine, and the billet enters the billet opening machine for 9-15 reciprocating rolling in different pass types, and the rolled piece enters the universal rough rolling mill for 1-7 reciprocating rolling, and the H-beam is rolled in the finishing mill for the last pass; after leaving the finishing mill, it is water-pierced, the side baffle opening is 900mm-960mm, the number of water nozzles is 1-21 groups, and the water pressure is 1.2MPa-1.5MPa. After water-piercing, the product flange has no deformation, and the flange slope meets the standard requirements. The above structure can specifically set the slope data within the set range for hot-rolled H-beams of different specifications, thereby further improving the rolling quality of the product and effectively avoiding deformation.

[0032] The finishing mill structure for controlling the deformation of the flange of the hot-rolled H-shaped steel after rapid cooling of the hot-rolled H-shaped steel is improved by improving the local structure of the finishing mill, specifically, the structure of the upper horizontal roll 1, the lower horizontal roll 5, and the vertical roll 8 is improved, so that the upper horizontal roll side working surface 3 of the upper horizontal roll rolling end 2 forms an inclination with the vertical line 4 within a specific range; the lower horizontal roll side working surface 7 of the lower horizontal roll rolling end 6 forms an inclination with the vertical line 4 within a specific range; the vertical roll end working surface 10 of the vertical roll rolling end 9 forms an inclination with the vertical line 4 within a specific range. In this way, during the rolling process of H-beams of different specifications, the heating temperature of the continuous casting special-shaped billet is controlled after passing through the heating furnace, the dephosphorization machine removes the surface iron oxide scale, the billet enters the billet opening machine for reciprocating rolling, the rolled piece enters the rough rolling mill for reciprocating rolling, the H-beam is rolled for the last pass in the finishing mill, and is pierced with water after leaving the finishing mill to control the opening degree of the side baffle, the number of water nozzles, and the water pressure to improve the quality of the product after rolling. After piercing with water, the product flange has no deformation and the flange inclination meets the standard requirements.

[0033] The present invention is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling, characterized in that: The upper horizontal roller (1) includes an upper horizontal roller rolling end (2), and the inclination of the upper horizontal roller side working surface (3) of the upper horizontal roller rolling end (2) and the vertical line (4) is in the range of 0.7° to 2.5°; the lower horizontal roller (5) includes a lower horizontal roller rolling end (6), and the inclination of the lower horizontal roller side working surface (7) of the lower horizontal roller rolling end (6) and the vertical line (4) is in the range of 0.7° to 2.5°; the vertical roller (8) includes a vertical roller rolling end (9), and the inclination of the vertical roller end working surface (10) of the vertical roller rolling end (9) and the vertical line (4) is in the range of 0.7° to 2.5°.

2. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 1, characterized in that: The vertical rollers (8) include a first vertical roller (11) and a second vertical roller (12), wherein the slope of the vertical roller end working surface (10) of the vertical roller rolling end (9) of the first vertical roller (11) and the vertical line (4) is in the range of 0.7° to 2.5°, and the slope of the vertical roller end working surface (10) of the vertical roller rolling end (9) of the second vertical roller (12) and the vertical line (4) is in the range of 0.7° to 2.5°.

3. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 2, characterized in that: The first vertical roller (11) and the second vertical roller (12) are arranged symmetrically, the first vertical roller (11) is arranged on one side of the upper horizontal roller side working surface (3) on the left side of the upper horizontal roller rolling end (2) and the lower horizontal roller side working surface (7) on the left side of the lower horizontal roller rolling end (6), and the second vertical roller (12) is arranged on the other side of the upper horizontal roller side working surface (3) on the right side of the upper horizontal roller rolling end (2) and the lower horizontal roller side working surface (7) on the right side of the lower horizontal roller rolling end (6).

4. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 3 is characterized in that: The inclination of the upper horizontal roller side working surface (3) of the upper horizontal roller rolling end (2) of the upper horizontal roller (1) and the horizontal line (13) is in the range of 87.5° to 89.3°; the inclination of the lower horizontal roller side working surface (7) of the lower horizontal roller rolling end (6) of the lower horizontal roller (5) and the horizontal line (13) is in the range of 87.5° to 89.3°.

5. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 4, characterized in that: The inclination of the lower horizontal roller side working surface (10) of the vertical roller rolling end (9) of the first vertical roller (11) and the horizontal line (13) is in the range of 87.5° to 89.3°, and the inclination of the lower horizontal roller side working surface (10) of the vertical roller rolling end (9) of the second vertical roller (12) and the horizontal line (13) is in the range of 87.5° to 89.3°.

6. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 3, characterized in that: The cross section of the side working surface (10) of the vertical roll rolling end (9) of the first vertical roll (11) is an outwardly convex V-shaped structure, and the most convex point is located at the center line (14) of the vertical roll; the cross section of the side working surface (10) of the vertical roll rolling end (9) of the second vertical roll (12) is an outwardly convex V-shaped structure, and the most convex point is located at the center line (14) of the vertical roll.

7. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 5, characterized in that: When rolling hot-rolled H-shaped steel of specifications of 630×200×15×20, the inclination of the upper horizontal roll side working surface (3) of the upper horizontal roll rolling end (2) of the upper horizontal roll (1) and the horizontal line (13) is within the range of 89.3°; the inclination of the lower horizontal roll side working surface (7) of the lower horizontal roll rolling end (6) of the lower horizontal roll (5) and the horizontal line (13) is within the range of 89.3°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the first vertical roll (11) and the horizontal line (13) is within the range of 89.3°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the second vertical roll (12) and the horizontal line (13) is within the range of 89.3°. The slope of the side working surface (10) of the lower horizontal roller and the horizontal line (13) is 89.3°; the continuous casting special-shaped billet is heated to 1200°C-1280°C in a heating furnace, the surface oxide scale is removed by a dephosphorization machine, and the billet enters a billet opening machine for 9-15 reciprocating rolling at different pass types, the rolled piece enters a universal rough rolling mill for 1-9 reciprocating rolling, and the H-shaped steel is rolled in a finishing mill for the last pass; after exiting the finishing mill, water is passed through, the side baffle opening is 1130mm, the number of water nozzles is 1-10 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product after water passing has no deformation, and the flange slope meets the standard requirements.

8. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling after rolling according to claim 5, characterized in that: When rolling hot-rolled H-shaped steel of 630×200×15×20 specifications, the inclination of the upper horizontal roll side working surface (3) of the upper horizontal roll rolling end (2) of the upper horizontal roll (1) and the horizontal line (13) is within the range of 87.5°; the inclination of the lower horizontal roll side working surface (7) of the lower horizontal roll rolling end (6) of the lower horizontal roll (5) and the horizontal line (13) is within the range of 87.5°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the first vertical roll (11) and the horizontal line (13) is within the range of 87.5°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the second vertical roll (12) and the horizontal line (13) is within the range of 87.5°. The inclination of the side working surface (10) and the horizontal line (13) is 87.5°; the continuous casting special-shaped billet is heated to 1200°C-1280°C in a heating furnace, the surface oxidized iron scale is removed by a dephosphorization machine, and the billet enters a billet opening machine for 9-15 reciprocating rolling at different pass types, the rolled piece enters a universal rough rolling mill for 1-9 reciprocating rolling, the H-shaped steel is rolled in a finishing mill for the last pass, and water is passed through the finishing mill, the side baffle opening is 1100mm-1140mm, the number of water nozzles is 1-10 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product after water passing has no deformation, and the flange inclination meets the standard requirements.

9. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 5, characterized in that: When rolling hot-rolled H-shaped steel of specifications 488×300×11×18, the inclination of the upper horizontal roll side working surface (3) of the upper horizontal roll rolling end (2) of the upper horizontal roll (1) and the horizontal line (13) is 88.6°; the inclination of the lower horizontal roll side working surface (7) of the lower horizontal roll rolling end (6) of the lower horizontal roll (5) and the horizontal line (13) is in the range of 88.6°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the first vertical roll (11) and the horizontal line (13) is 88.6°, and the lower horizontal roll side working surface (11) of the vertical roll rolling end (9) of the second vertical roll (12) is 88.6°. The slope of the side working surface (10) of the roller and the horizontal line (13) is 88.6°; the continuous casting special-shaped billet is heated to 1200°C-1280°C in a heating furnace, the surface oxide scale is removed by a dephosphorization machine, and the billet enters a billet opening machine for 9-15 reciprocating rolling at different pass types, the rolled piece enters a universal rough rolling mill for 1-7 reciprocating rolling, and the H-shaped steel is rolled in a finishing mill for the last pass; after exiting the finishing mill, water is passed through, the side baffle opening is 990mm-1030mm, the number of water nozzles is 1-8 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product after water passing has no deformation, and the flange slope meets the standard requirements.

10. The finishing mill structure for controlling flange deformation of hot-rolled H-beam after rapid cooling according to claim 5, characterized in that: When rolling hot-rolled H-shaped steel with a specification of 305×305×223, the inclination of the upper horizontal roll side working surface (3) of the upper horizontal roll rolling end (2) of the upper horizontal roll (1) and the horizontal line (13) is within the range of 88.2°; the inclination of the lower horizontal roll side working surface (7) of the lower horizontal roll rolling end (6) of the lower horizontal roll (5) and the horizontal line (13) is within the range of 88.2°; the inclination of the lower horizontal roll side working surface (10) of the vertical roll rolling end (9) of the first vertical roll (11) and the horizontal line (13) is within the range of 88.2°, and the lower horizontal roll side working surface (11) of the vertical roll rolling end (9) of the second vertical roll (12) is within the range of 88.2°. The inclination of the side working surface (10) and the horizontal line (13) is 88.2°; the continuous casting special-shaped billet is heated to 1200°C-1280°C in a heating furnace, the surface oxide scale is removed by a dephosphorization machine, and the billet enters a billet opening machine for 9-15 reciprocating rolling at different pass types, the rolled piece enters a universal rough rolling mill for 1-7 reciprocating rolling, and the H-shaped steel is rolled in a finishing mill for the last pass; after exiting the finishing mill, water is passed through, the side baffle opening is 900mm-960mm, the number of water nozzles is 1-21 groups, the water pressure is 1.2MPa-1.5MPa, and the flange of the product after water passing has no deformation, and the flange inclination meets the standard requirements.

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