A production method and production line for arc-shaped hot-rolled H-beam

Abstract

The present invention discloses a production method and production line of arc-shaped hot-rolled H-shaped steel, which belongs to the technical field of arc-shaped hot-rolled H-shaped steel rolling production, and comprises the following steps: placing the steel billet into a heating furnace for heating, and entering the arc-shaped finishing rolling unit for finishing rolling after high-pressure water dephosphorization and rough rolling; the arc-shaped hot-rolled H-shaped steel obtained after finishing rolling is then subjected to water cooling, hot sawing and air cooling, so that the temperature of the arc-shaped hot-rolled H-shaped steel reaches 80-120°C; the arc-shaped hot-rolled H-shaped steel after air cooling is collected and stacked by a bundling device to complete the arc-shaped hot-rolled H-shaped steel production operation; wherein the rolling mills on the arc-shaped finishing rolling unit are arranged on the same arc. The beneficial effects of the present invention are: the arc-shaped hot-rolled H-shaped steel is formed by finishing rolling of the arc-shaped finishing rolling unit, so that the arc-shaped hot-rolled H-shaped steel product is rolled and formed in one piece, and the fine-grained pearlite and ferrite structure is achieved through controlled rolling and controlled cooling, and the strength and toughness are excellent, and the potential risk of cold bending stress concentration of cold-bent H-shaped steel is overcome, and it can be applied to the construction of large venues.

Description

Technical Field

[0001] The invention relates to the technical field of arc-shaped hot-rolled H-shaped steel rolling production, and in particular to an arc-shaped hot-rolled H-shaped steel production method and a production line. Background Art

[0002] Collapse accidents have occurred when hot-rolled H-shaped steel bars were used in the construction of large stadiums (basketball halls). Large flat-roofed stadiums (basketball halls) are prone to snow and water accumulation, and welded steel beams are prone to cracking due to welding stress, causing catastrophic collapse accidents.

[0003] Cold-bent H-shaped steel is most likely to cause bending internal stress damage, and there will be hidden safety accidents when used in large venues. However, the use of integral curved beam hot-rolled H-shaped steel can avoid the occurrence of dangers such as snow accumulation and steel structure welding cracks, which is of great significance for improving the safety of large venues.

[0004] However, there is currently no relevant production method and production line for hot-rolled H-shaped steel with integral curved beams, and the production of hot-rolled H-shaped steel with integral curved beams cannot be realized.

[0005] In view of this, the inventor conducted in-depth research on this demand, and thus the present case was produced. Summary of the invention

[0006] In order to overcome the problems that cold-bent H-shaped steel in the prior art is prone to bending internal stress damage, there will be potential safety accidents when used in large venues, and there is no relevant production method and production line for hot-rolled H-shaped steel with integral curved beams, the present invention provides a method for producing curved hot-rolled H-shaped steel, comprising the following steps:

[0007] Step 1: placing the steel billet into a heating furnace for heating, and after high-pressure water dephosphorization and rough rolling, entering the arc finishing mill for finishing rolling;

[0008] Step 2: The arc-shaped hot-rolled H-shaped steel obtained after finish rolling is then water-cooled, hot-sawn and air-cooled to make the temperature of the arc-shaped hot-rolled H-shaped steel reach 80-120° C.

[0009] Step 3: The arc-shaped hot-rolled H-shaped steel after air cooling is collected and stacked by a bundling device, thereby completing the arc-shaped hot-rolled H-shaped steel production operation;

[0010] The rolling mills on the arc-shaped finishing mill group are arranged on the same arc.

[0011] An arc-shaped hot-rolled H-shaped steel is formed by finish rolling using an arc-shaped finishing rolling mill, wherein the rolling mills on the arc-shaped finishing rolling mill are arranged on the same arc, so that the arc-shaped hot-rolled H-shaped steel is transported and rolled along the arc direction, effectively solving the transportation problem of the arc-shaped hot-rolled H-shaped steel during the hot rolling process.

[0012] Preferably, in step one, the steel billet is placed in a heating furnace and heated to a temperature of M1 to M1+ΔM1, the steel billet is selected from one or both of hot billets and cold billets, wherein M1 is 1250 to 1290°C, ΔM1 is 20 to 40°C, and the heating time is 2.0 to 4.0 hours.

[0013] Preferably, the heating furnace includes heating section 1, heating section 2, heating section 3 and soaking section from front to back, and the heating temperature of heating section 1 is controlled at M 11 ~M 11 +ΔM 11 , where M 11 960~1100℃, ΔM 11 20~120℃; heating temperature of heating stage 2 is controlled at M 12 ~M 12 +ΔM 12 , where M 12 1150-1290℃, ΔM 12 10~100℃; heating temperature of 3 stages is controlled at M 13 ~M 13 +ΔM 13 , where M 13 1260~1320℃, ΔM 13 It is 10~100℃.

[0014] Preferably, the rough rolling start temperature is M2~M2+ΔM2, wherein M2 is 1080~1160°C, ΔM2 is 50~80°C; the finishing rolling start temperature is M3~ M3 +ΔM3, where M3 is 960~1050℃, ΔM3 is 40~100℃; the finishing rolling temperature is M4~M4+ΔM4, where M4 is 900~950℃, ΔM4 is 70~120℃; the temperature of the arc hot-rolled H-beam at the water-cooling outlet is 550~650℃.

[0015] Here, the steel billet is heated to a certain temperature by a heating furnace before rough rolling and finish rolling, and the temperature of the hot-rolled H-beam is controlled during the rough rolling and finish rolling process, thus achieving effective control of the production of arc-shaped hot-rolled H-beam.

[0016] Preferably, in step 2, two water coolings and two air coolings are used, and the outlet temperature of the first water cooling is 720-820°C, the outlet temperature of the second water cooling is 550-650°C, and the outlet temperature of the first air cooling is 240-320°C.

[0017] The hot-rolled H-beam is cooled by two water cooling and two air cooling, so that the arc-shaped hot-rolled H-beam finally forms a ferrite and pearlite structure with excellent strength and elongation.

[0018] Preferably, in step 1, the finishing rolling is carried out by a two-roll mill, a first universal mill, a second universal mill, a first edge rolling mill, a third universal mill, a first unequal diameter bending mill, a fourth universal mill, a second unequal diameter bending mill, a second edge rolling mill, a third unequal diameter bending mill, a fifth universal mill, a fourth unequal diameter bending mill, a third edge rolling mill, a fifth unequal diameter bending mill, a sixth universal mill, and a sixth unequal diameter bending mill. The finishing rolling process of the H-beam is realized by rolling six times with a universal mill and six times with an unequal diameter bending mill, and the mechanical properties, surface quality, and dimensional deviation of the obtained arc-shaped hot-rolled H-beam meet the use standard requirements.

[0019] The present invention also provides an arc-shaped hot-rolled H-shaped steel production line adopting the above-mentioned production method, which comprises a heating furnace, a high-pressure water dephosphorization device, a rough rolling mill, a head cutting flying shear, an arc-shaped finishing rolling unit, a water cooling unit, a hot sawing machine, an air cooling unit and a bundling device in sequence.

[0020] Preferably, the arc finishing mill group includes, in sequence, a two-roll mill, a first universal mill, a second universal mill, a first edge rolling mill, a third universal mill, a first unequal diameter bending mill, a fourth universal mill, a second unequal diameter bending mill, a second edge rolling mill, a third unequal diameter bending mill, a fifth universal mill, a fourth unequal diameter bending mill, a third edge rolling mill, a fifth unequal diameter bending mill, a sixth universal mill, and a sixth unequal diameter bending mill; the water cooling unit includes a first water cooler and a second water cooler, and the air cooling unit includes a first air cooler and a second air cooler;

[0021] Among them, the third universal rolling mill, the first unequal diameter arc bending rolling mill, the fourth universal rolling mill, the second unequal diameter arc bending rolling mill, the second edge rolling mill, the third unequal diameter arc bending rolling mill, the fifth universal rolling mill, the fourth unequal diameter arc bending rolling mill, the third edge rolling mill, the fifth unequal diameter arc bending rolling mill, the sixth universal rolling mill, the sixth unequal diameter arc bending rolling mill, the first water cooler, the second water cooler, the hot saw machine, the first air cooler and the second air cooler are all arranged on the same arc; and the first unequal diameter arc bending rolling mill, the second unequal diameter arc bending rolling mill, the third unequal diameter arc bending rolling mill, the fourth unequal diameter arc bending rolling mill, the fifth unequal diameter arc bending rolling mill and the sixth unequal diameter arc bending rolling mill are all unequal diameter arc bending rolling mills with the same specifications; the first water cooler and the second water cooler are arc water cooling devices with the same specifications, and the first air cooler and the second air cooler are arc air cooling devices with the same specifications.

[0022] Preferably, the unequal diameter bending arc rolling mill comprises a rolling mill frame, a long diameter roller and a short diameter roller, the long diameter roller and the short diameter roller are at the same height and the central axes are both arranged vertically, a bending arc rolling space for the arc-shaped hot-rolled H-beam to pass through is reserved between the outer circumferential surfaces of the long diameter roller and the short diameter roller, and a driving mechanism for controlling the rotation of the long diameter roller and the short diameter roller is arranged on the rolling mill frame. The long diameter roller and the short diameter roller are matched, and the difference in roller diameters on both sides of the hot-rolled H-beam is utilized and then matched with an appropriate roller speed to change the metal elongation, thereby realizing the rolling of the arc-shaped hot-rolled H-beam.

[0023] Preferably, the arc-shaped water cooling device includes an arc-shaped transport roller, on which a water treatment system and a surface cleaning system are arranged in sequence from front to back, and the water treatment system includes a water spray pipe, and the water spray pipe includes an upper water spray pipe and a lower water spray pipe arranged above and below the web of the arc-shaped hot-rolled H-shaped steel, and a left water spray pipe and a right water spray pipe arranged on the left and right flanges of the arc-shaped hot-rolled H-shaped steel, and nozzles are distributed on the upper water spray pipe, the lower water spray pipe, the left water spray pipe and the right water spray pipe close to the side of the arc-shaped hot-rolled H-shaped steel.

[0024] Beneficial effects:

[0025] The beneficial effects produced by the technical solution of the present invention are as follows:

[0026] (1) The arc-shaped hot-rolled H-shaped steel is formed by the arc-shaped finishing rolling unit, wherein the rolling mills on the arc-shaped finishing rolling unit are arranged on the same arc, so that the arc-shaped hot-rolled H-shaped steel is transported and rolled along the arc direction, which effectively solves the transportation problem during the hot rolling process of the arc-shaped hot-rolled H-shaped steel, and realizes the integrated rolling and forming of the arc-shaped hot-rolled H-shaped steel product. Through controlled rolling and controlled cooling, fine-grained pearlite and ferrite structures are achieved, and the strength and toughness are excellent. The potential risk of cold-bending stress concentration of cold-bent H-shaped steel is overcome, and it is applied to the construction of large stadiums (basketball halls) to avoid catastrophic collapse accidents caused by the opening of welding stress in welded steel beams due to snow and water accumulation.

[0027] (2) The steel billet is heated to a certain temperature in a heating furnace before rough rolling and finish rolling. The temperature of the hot-rolled H-beam is controlled during the rough rolling and finish rolling processes, thereby achieving effective control of the production of arc-shaped hot-rolled H-beam.

[0028] (3) The H-beam finishing process is realized by using six universal rolling mills and six unequal diameter bending arc rolling mills, and the mechanical properties, surface quality, dimensional deviation, etc. of the obtained arc-shaped hot-rolled H-beams meet the requirements of the use standards.

[0029] (4) The unequal diameter bending mill uses a combination of long diameter rolls and short diameter rolls. It uses the different roll diameters on both sides of the hot-rolled H-beam and then combines the appropriate roll speed to change the metal elongation, achieve bending in the high-temperature rolling austenite area, and have low deformation resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a preferred production process flow chart of arc-shaped hot-rolled H-beam of the present invention;

[0032] Figure 2 This is a schematic structural diagram of a preferred arc-shaped hot-rolled H-beam production line of the present invention;

[0033] Figure 3 This is a schematic diagram of the structure of a preferred arc-shaped hot-rolled H-shaped steel arc-shaped transport roller table of the present invention;

[0034] Figure 4 This is a schematic diagram of the main structure of a preferred unequal-diameter bending and arc rolling mill of the present invention;

[0035] Figure 5 It is a schematic diagram of the side view structure of a preferred unequal diameter bending arc rolling mill of the present invention;

[0036] Figure 6 It is a schematic diagram of the structure of a preferred arc-shaped water cooling device of the present invention;

[0037] Figure 7 It is a schematic diagram of the structure of a preferred water treatment system of the present invention;

[0038] Figure 8 This is a schematic diagram of the main structure of a preferred arc-shaped air cooling device of the present invention;

[0039] Fig. 9 This is a schematic diagram of the side view of the preferred arc-shaped air cooling device of the present invention. Figure 1 ;

[0040] Fig.10 This is a schematic diagram of the side view of the preferred arc-shaped air cooling device of the present invention. Figure 2 ;

[0041] Fig.11 It is a schematic diagram of a top view of a preferred bundling device of the present invention;

[0042] Fig.12 It is a schematic diagram of the side structure of a preferred bundling device of the present invention. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] This embodiment adopts an arc finishing mill group to finish rolling to form arc-shaped hot-rolled H-shaped steel, wherein the rolling mills on the arc finishing mill group are arranged on the same arc, so that the arc-shaped hot-rolled H-shaped steel is transported and rolled along the arc direction, which effectively solves the transportation problem during the hot rolling process of the arc-shaped hot-rolled H-shaped steel. The specific implementation method is as follows:

[0045] like Figure 1-2 As shown, a method for producing arc-shaped hot-rolled H-beam comprises the following steps:

[0046] Step S101, placing the steel billet into a heating furnace for heating, and after high-pressure water dephosphorization and rough rolling, entering an arc-shaped finishing mill for finishing rolling;

[0047] Step S102, the arc-shaped hot-rolled H-shaped steel obtained after finish rolling is then water-cooled, hot-sawn and air-cooled, so that the temperature of the arc-shaped hot-rolled H-shaped steel reaches 80-120° C.;

[0048] Step S103, the arc-shaped hot-rolled H-shaped steel after air cooling is collected and stacked by a bundling device, thereby completing the arc-shaped hot-rolled H-shaped steel production operation;

[0049] The rolling mills on the arc-shaped finishing mill group are arranged on the same arc.

[0050] As a preferred embodiment, in step S101, the steel billet is placed in a heating furnace and heated to a temperature of M1 to M1+ΔM1, the steel billet is selected from one or both of a hot billet and a cold billet, wherein M1 is 1250 to 1290°C, ΔM1 is 20 to 40°C, and the heating time is 2.0 to 4.0h.

[0051] As a preferred embodiment, the heating furnace includes a heating section 1, a heating section 2, a heating section 3 and a soaking section from front to back, and the heating temperature of the heating section 1 is controlled at M 11 ~M 11 +ΔM 11 , where M 11 960~1100℃, ΔM 11 20~120℃; heating temperature of heating stage 2 is controlled at M12 ~M 12 +ΔM 12 , where M 12 1150-1290℃, ΔM 12 10-100℃; heating temperature of 3 stages is controlled at M 13 ~M 13 +ΔM 13 , where M 13 1260-1320℃, ΔM 13 It is 10~100℃.

[0052] As a preferred embodiment, the rough rolling start temperature is M2~M2+ΔM2, where M2 is 1080~1160℃, ΔM2 is 50~80℃; the finishing rolling start temperature is M3~M3+ΔM3, where M3 is 960~1050℃, ΔM3 is 40~100℃; the finishing rolling final rolling temperature is M4~M4+ΔM4, where M4 is 900~950℃, ΔM4 is 70~120℃; the temperature of the arc-shaped hot-rolled H-beam at the water-cooling outlet is 550~650℃. Here, the billet is heated to a certain temperature by a heating furnace before rough rolling and finishing rolling, and the temperature of the hot-rolled H-beam is controlled during the rough rolling and finishing rolling process, so as to realize the effective control of the production of the arc-shaped hot-rolled H-beam.

[0053] As a preferred embodiment, in step S102, two water cooling and two air cooling are used, and the outlet temperature of the first water cooling is 720-820°C, the outlet temperature of the second water cooling is 550-650°C, and the outlet temperature of the first air cooling is 240-320°C. The hot-rolled H-beam after rolling is cooled by two water cooling and two air cooling, so that the temperature after hot rolling reaches 80-120°C, so as to facilitate further collection and stacking.

[0054] As a preferred embodiment, in step S101, the finishing rolling is performed in sequence by a two-roller mill 110, a first universal mill 210, a second universal mill 220, a first edge rolling mill 310, a third universal mill 230, a first unequal diameter bending mill 410, a fourth universal mill 240, a second unequal diameter bending mill 420, a second edge rolling mill 320, a third unequal diameter bending mill 430, a fifth universal mill 250, a fourth unequal diameter bending mill 440, a third edge rolling mill 330, a fifth unequal diameter bending mill 450, a sixth universal mill 260, and a sixth unequal diameter bending mill 460. The finishing rolling process of the H-beam is realized by using six times of rolling by the universal mill and six times of rolling by the unequal diameter bending mill, and the mechanical properties, surface quality, dimensional deviation, etc. of the obtained arc-shaped hot-rolled H-beam meet the use standard requirements.

[0055] like Figure 2As shown, this embodiment also provides a curved hot-rolled H-beam production line using the above production method, which sequentially includes a heating furnace 510, a high-pressure water dephosphorization device 520, a rough rolling mill 530, a head shear 540, a curved finishing mill unit, a water cooling unit, a hot saw 550, an air cooling unit and a bundling device 600. Here, the rough rolling mill 530 includes a push bed and steel turning machine 532 and a BD rolling mill 531. The push bed and steel turning machine 532 repeatedly turn over the heated billet, and the BD rolling mill 531 presses it; two hot saws 550 can be set, one of which is a spare.

[0056] As a preferred embodiment, the arc finishing mill group includes, in sequence, a two-roll mill 110, a first universal mill 210, a second universal mill 220, a first edge rolling mill 310, a third universal mill 230, a first unequal diameter bending mill 410, a fourth universal mill 240, a second unequal diameter bending mill 420, a second edge rolling mill 320, a third unequal diameter bending mill 430, a fifth universal mill 250, a fourth unequal diameter bending mill 440, a third edge rolling mill 330, a fifth unequal diameter bending mill 450, a sixth universal mill 260, and a sixth unequal diameter bending mill 460; the water cooling unit includes a first water cooling machine 560 and a second water cooling machine 570, and the air cooling unit includes a first air cooling machine 580 and a second air cooling machine 590;

[0057] The third universal mill 230, the first unequal diameter bending mill 410, the fourth universal mill 240, the second unequal diameter bending mill 420, the second edge rolling mill 320, the third unequal diameter bending mill 430, the fifth universal mill 250, the fourth unequal diameter bending mill 440, the third edge rolling mill 330, the fifth unequal diameter bending mill 450, the sixth universal mill 260, the sixth unequal diameter bending mill 460, the first water cooler 560, the second water cooler 570, the hot The sawing machine 550, the first air cooler 580 and the second air cooler 590 are all arranged on the same arc; and the first unequal diameter arc bending rolling mill, the second unequal diameter arc bending rolling mill, the third unequal diameter arc bending rolling mill, the fourth unequal diameter arc bending rolling mill, the fifth unequal diameter arc bending rolling mill and the sixth unequal diameter arc bending rolling mill are all unequal diameter arc bending rolling mills with the same specifications; the first water cooler and the second water cooler are arc-shaped water cooling devices with the same specifications, and the first air cooler and the second air cooler are arc-shaped air cooling devices with the same specifications.

[0058] It should be noted that the heating furnace 510, the high-pressure water dephosphorization device 520, the rough rolling mill 530, the crop shear 540 and the hot saw 550 all adopt the equipment commonly used in the existing hot-rolled H-beam production, which will not be described here; the following focuses on the structure of the unequal diameter bending arc rolling mill, the arc transport roller, the arc water cooling device, the arc air cooling device and the bundling device.

[0059] As a preferred embodiment, during the finishing rolling, water cooling, hot sawing and air cooling processes, since the transport track of the arc-shaped hot-rolled H-beam is an arc, an arc-shaped transport roller is required for transport and connection between the continuous rolling mill, such as Figure 3 As shown, the arc-shaped transport roller comprises a horizontal transport roller assembly 21 and a lateral guide roller assembly 22, wherein the lateral guide roller assembly 22 is arranged directly above the horizontal transport roller assembly 21, and the lateral guide roller assembly 22 comprises an outer arc-shaped side bearing box 221 and an inner arc-shaped side bearing box 222, wherein the central axes of the outer arc-shaped side bearing box 221 and the inner arc-shaped side bearing box 222 coincide with each other, and an arc-shaped transport space for the arc-shaped hot-rolled H-shaped steel to pass through is formed between the outer arc-shaped side bearing box 221 and the inner arc-shaped side bearing box 222;

[0060] A plurality of outer arc guide rollers 223 and inner arc guide rollers 224 are evenly distributed on the outer arc side bearing box 221 and the inner arc side bearing box 222 on both sides of the arc transport space.

[0061] The outer arc guide roller 223 is vertically mounted on the outer arc side bearing box 221 and can rotate along its central axis; the inner arc guide roller 224 is vertically mounted on the inner arc side bearing box 222 and can rotate along its central axis.

[0062] The diameters of the outer arc guide roller 223 and the inner arc guide roller 224 are equal, and the central axes of all the outer arc guide rollers 223 are located on the same arc surface, and the central axes of all the inner arc guide rollers 224 are located on the same arc surface, and the central axes of the arc surfaces where the central axes of the outer arc guide rollers 223 are located coincide with the central axes of the arc surfaces where the central axes of the inner arc guide rollers 224 are located.

[0063] As a preferred embodiment, the radius R1 of the arc surface where the central axis of the outer arc guide roller 223 is located, the radius R2 of the arc surface where the central axis of the inner arc guide roller 224 is located, the radii R0 of the inner arc guide roller 223 and the outer arc guide roller 224, and the width D of the arc-shaped hot-rolled H-shaped steel 100 satisfy the following relationship:

[0064] R1-R2-2*R0=D.

[0065] An arc-shaped guide channel is formed by an outer arc-shaped guide roller and an inner arc-shaped guide roller to guide the arc-shaped hot-rolled H-shaped steel during transportation. At the same time, the passive rotation guide design of the guide roller also reduces the resistance encountered by the arc-shaped hot-rolled H-shaped steel during transportation and the friction damage to the surface of the arc-shaped hot-rolled H-shaped steel.

[0066] The horizontal transport roller assembly 21 includes a transport roller frame 211, a plurality of transport rollers 212 distributed along the length direction of the transport roller frame 211, and a driving mechanism 213 for controlling the rotation of the transport rollers 212. The transport rollers 212 are evenly distributed on the transport roller frame 211 along the length direction of the transport roller frame 211, and a transmission gear 214 is provided on the transport rollers 212.

[0067] The driving mechanism 213 is installed on the transport roller frame 211 and controls the transport roller 212 to rotate by driving the transmission gear 214 .

[0068] Both ends of the transport roller 212 are rotatably mounted on the transport roller frame 211 via a rotating shaft, and the transmission gear 214 is provided on the rotating shaft at one end or both ends of the transport roller 212;

[0069] The driving mechanism 213 includes a driving motor 215 and a driving gear 216 . The driving motor 215 is fixedly mounted on the transport roller frame 211 . The driving gear 216 is disposed at a movable end of the driving motor 215 . The driving gear 216 drives the transmission gear 214 to rotate via a chain 217 .

[0070] like Figure 4 and 5 As shown, the unequal diameter bending arc rolling mill includes a rolling mill frame 11, a long diameter roller 12 and a short diameter roller 13, the long diameter roller 12 and the short diameter roller 13 are at the same height and the center axes are vertically arranged, and an arc rolling space for the arc-shaped hot-rolled H-shaped steel 100 to pass through is reserved between the outer circumferential surfaces of the long diameter roller 12 and the short diameter roller 13, and a driving mechanism 14 for controlling the rotation of the long diameter roller 12 and the short diameter roller 13 is arranged on the rolling mill frame 11.

[0071] The rolling mill frame 11 is provided with two driving mechanisms 14 for controlling the rotation of the long diameter roller 12 and the short diameter roller 13 respectively. Each of the driving mechanisms 14 includes a rotating motor 141 and a reducer 142. The reducer 142 is fixedly mounted on the rolling mill frame 11. The input end of the reducer 142 is fixedly mounted with the corresponding rotating motor 141.

[0072] The output end of the speed reducer 142 is connected to the rotating shaft of the long-diameter roller 12 or the short-diameter roller 13 .

[0073] A rotating shaft is disposed on the central axis of the long diameter roller 12 and the short diameter roller 13 , one end of the rotating shaft is connected to the output end of the corresponding reducer 142 , and the other end is rotatably mounted on the rolling mill frame 11 .

[0074] The output end of the speed reducer 142 is connected to the rotating shaft of the long-diameter roller 12 or the short-diameter roller 13 through a universal transmission shaft 143 .

[0075] A long diameter roller bearing box 121 and a short diameter roller bearing box 131 are respectively arranged at positions corresponding to the long diameter roller 12 and the short diameter roller 13 on the rolling mill frame 11, and the rotating shafts at both ends of the long diameter roller 12 can be rotatably mounted on the bearings 122 on the long diameter roller bearing box 121, and the rotating shafts at both ends of the short diameter roller 13 can be rotatably mounted on the bearings on the short diameter roller bearing box 131; here, a certain gap is left between the outer circumferential surface of the long diameter roller 12 and the inner wall of the long diameter roller bearing box 121, and a certain gap is left between the outer circumferential surface of the short diameter roller 13 and the inner wall of the short diameter roller bearing box 131, and the gap width is 5-15cm.

[0076] The rotating shaft at one end of the long-diameter roller 12 passes through the bearing 122 on the long-diameter roller bearing box 121 and is detachably mounted on the corresponding universal transmission shaft 143 through the connecting shaft 123; the rotating shaft at one end of the short-diameter roller 13 passes through the bearing on the short-diameter roller bearing box 131 and is detachably mounted on the corresponding universal transmission shaft 143 through the connecting shaft 123.

[0077] A horizontal slide rail 111 is provided on the rolling mill frame 11 , and the long-diameter roller bearing box 121 and the short-diameter roller bearing box 131 are slidably mounted on the horizontal slide rail 111 .

[0078] A horizontal hydraulic cylinder 112 is provided on the rolling mill frame 11 on the side where the long diameter roller 12 and the short diameter roller 13 are away from each other, and the long diameter roller bearing box 121 and the short diameter roller bearing box 131 are respectively installed at the movable ends corresponding to the horizontal hydraulic cylinder 112 .

[0079] The rolling mill frame 11 is provided with a lifting hydraulic cylinder 113, and a shoulder pole hanging beam 114 is installed at the movable end of the lifting hydraulic cylinder 113, and the universal transmission shaft 143 is rotatably sleeved on the shoulder pole hanging beam 114. The long-diameter roller bearing box and the short-diameter roller bearing box are provided to protect the rotating long-diameter roller and the short-diameter roller, and can improve the stability of the long-diameter roller and the short-diameter roller. In addition, the roller bearing box is matched with the slide rail slider structure and the horizontal hydraulic cylinder, so that the distance adjustment between the long-diameter roller and the short-diameter roller is more stable and convenient. Here, it also includes a bottom beam 115, and the rolling mill frame 11 is installed on the bottom beam 115 through a height adjustment hydraulic cylinder 116.

[0080] like Figure 6 and 7 As shown, the arc-shaped water cooling device comprises an arc-shaped transport roller 2, on which a water treatment system 31 and a surface cleaning system 32 are sequentially arranged from front to back.

[0081] The water treatment system 31 includes a water spray pipe 33, which includes an upper water spray pipe 331 and a lower water spray pipe 332 arranged above and below the web of the arc-shaped hot-rolled H-shaped steel, and a left water spray pipe (not shown in the figure) and a right water spray pipe (not shown in the figure) arranged on the left and right flanges of the arc-shaped hot-rolled H-shaped steel. Nozzles 333 are distributed on the upper water spray pipe 331, the lower water spray pipe 332, the left water spray pipe and the right water spray pipe near the side of the arc-shaped hot-rolled H-shaped steel. The upper water spray pipe, the lower water spray pipe, the left water spray pipe and the right water spray pipe are used to spray cooling water from the left and right flanges and the web of the arc-shaped hot-rolled H-shaped steel from top to bottom, thereby achieving uniform cooling.

[0082] The plurality of upper water spray pipes 331 and the plurality of lower water spray pipes 332 are respectively arranged at upper and lower positions of the web of the arc-shaped hot-rolled H-shaped steel along the length direction of the arc-shaped transport roller 2;

[0083] A plurality of the left water spray pipes and a plurality of the right water spray pipes are respectively arranged at the left and right flange positions of the arc-shaped hot-rolled H-shaped steel along the length direction of the arc-shaped transport roller.

[0084] The water treatment system 31 further comprises an arc-shaped ditch 34 arranged on the ground below the arc-shaped transport roller conveyor 2 , and a sewage outlet 341 is arranged in the arc-shaped ditch 34 .

[0085] The water treatment system 31 also includes a circulating water pool 35, a water pump 36, a pipeline valve group 37, a vortex well 38, a sewage purifier 39 and an air cooling tower 342. The sewage outlet 341 of the arc-shaped ditch 34 is connected to the inlet of the vortex well 38, the outlet of the vortex well 38 is connected to the inlet of the sewage purifier 39, the outlet of the sewage purifier 39 is connected to the inlet of the air cooling tower 342, and the outlet of the air cooling tower 342 is connected to the circulating water pool 35. The circulating water pool 35 is connected to the inlet of the water spray pipe 33 through a pipeline; the water pump 36 and the pipeline valve group 37 are arranged on the pipeline between the circulating water pool 35 and the water spray pipe 33.

[0086] The surface cleaning system 32 includes a first compressed air purge pipe 321, a clean water flushing pipe 322 and a second compressed air purge pipe 323 from front to back along the length direction of the curved transport roller 2. Nozzles 333 are distributed on the first compressed air purge pipe 321, the clean water flushing pipe 322 and the second compressed air purge pipe 323 near the side of the curved hot-rolled H-beam. The high-flow cooling of circulating water, clean water flushing and compressed air purge are adopted to realize the cooling organization control and surface cleaning of the curved hot-rolled H-beam, while saving water resources.

[0087] like Figure 8-10As shown, the arc air cooling device includes an arc transport roller 2, on which an arc air cooling system 4 is arranged, and the arc air cooling system 4 includes an arc cavity 41 and air cooling nozzles 411 evenly arranged on the inner wall of the arc cavity 41, and the middle of the upper surface of the arc transport roller 2 is located in the cavity formed by the inner wall of the arc cavity 41, and the spray direction of the air cooling nozzle 411 is facing the arc hot-rolled H-shaped steel 100.

[0088] As a preferred embodiment, Fig. 9 As shown, the cross-section of the arc cavity 41 is square, and the air cooling nozzle 411 includes an upper nozzle 412, a lower nozzle 413 and a side nozzle 414, a number of the upper nozzles 412 are evenly arranged along the length direction of the arc transport roller 2 directly above the arc hot-rolled H-beam 100, a number of the lower nozzles 413 are evenly arranged along the length direction of the arc transport roller 2 directly below the arc hot-rolled H-beam 100, and a number of the side nozzles 414 are evenly arranged along the length direction of the arc transport roller 2 on the left and right sides of the arc hot-rolled H-beam 100.

[0089] As a preferred embodiment, Fig.10 As shown, the cross section of the arc-shaped cavity 41 is circular, and the air cooling nozzles 411 are evenly arranged on the inner wall of the arc-shaped cavity 41 along the circumferential direction of the arc-shaped cavity 41 .

[0090] The arc-shaped air cooling system 4 also includes a fan 42 and a regulating valve 43. A dust removal net 44 is arranged between the air inlet of the fan 42 and the outdoor air. The air outlet of the fan 42 is connected to the air inlet of the arc-shaped cavity 41. A regulating valve 43 is arranged at the air inlet of the arc-shaped cavity 41. The air cooling nozzles 411 are distributed on the inner wall of the arc-shaped cavity 41.

[0091] Air inlets are provided directly above and below the arc-shaped cavity 41 , and a regulating valve 43 is provided at each air inlet.

[0092] As a preferred embodiment, the lateral guide roller assembly 22 in the arc-shaped transport roller 2 includes an outer arc-shaped side bearing box 221 and an inner arc-shaped side bearing box 222, and the outer arc-shaped side bearing box 221 and the inner arc-shaped side bearing box 222 are located inside the arc-shaped cavity 41 and are led out from both sides of the front and rear openings of the arc-shaped cavity 41;

[0093] The arc-shaped cavity 41 is provided with a mounting opening 415 on its circumferential surface, and the horizontal transport roller assembly 2 is disposed through the mounting opening 415 . Both ends of the transport roller 212 pass through the mounting opening 415 and the middle portion is located inside the arc-shaped cavity 41 .

[0094] like Fig.11 and 12As shown, the bundling device 600 includes a supporting wheel chain plate mechanism 61, an arc-shaped H-shaped steel stack 62, and a stacking robot 63 for transferring the arc-shaped hot-rolled H-shaped steel 100 on the supporting wheel chain plate mechanism 61 to the arc-shaped H-shaped steel stack 62. The supporting wheel chain plate mechanism 61 includes a driving sprocket 611, a driven sprocket 612, and a supporting wheel chain group 64 mounted on the driving sprocket 611 and the driven sprocket 612.

[0095] The roller chain assembly 64 includes a plurality of roller chains 65 arranged along the axis direction of the driving sprocket 611 , and each of the roller chains 65 is formed by a plurality of chain plates 651 hinged end to end.

[0096] A chain roller 652 is mounted on each of the chain plates 651 , and both ends of the chain roller 652 are rotatably mounted on the chain plates 651 ; and the lengths and radii of all the chain rollers 652 are the same.

[0097] The distance between two adjacent roller chains 65 is equal, and when the central axes of the two chain rollers 652 on the same roller chain 65 are in a horizontal state, the central axes of the two chain rollers 652 are located on the same straight line.

[0098] The palletizing robot 63 includes a rail column 631, a driving track 632, a driving track 633 and a manipulator 634. The two driving tracks 632 are horizontally arranged on both sides of the supporting wheel chain plate mechanism 61 through the rail column 631, and the length direction of the driving track 632 is perpendicular to the central axis of the driving sprocket 611.

[0099] The crane 633 is installed on the crane track 632 and can move back and forth along the length direction of the crane track 632. The robot 634 for transferring the arc-shaped hot-rolled H-shaped body 100 is installed at the bottom of the crane 633.

[0100] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for producing arc-shaped hot-rolled H-beam, characterized in that: The steps include: Step 1: placing the steel billet into a heating furnace for heating, and after high-pressure water dephosphorization and rough rolling, entering the arc finishing mill for finishing rolling; Step 2: The arc-shaped hot-rolled H-shaped steel obtained after finish rolling is then water-cooled, hot-sawn and air-cooled to make the temperature of the arc-shaped hot-rolled H-shaped steel reach 80-120° C. Step 3: The arc-shaped hot-rolled H-shaped steel after air cooling is collected and stacked by a bundling device, thereby completing the arc-shaped hot-rolled H-shaped steel production operation; The rolling mills on the arc finishing mill group are arranged on the same arc; In the step one, the finishing rolling is carried out in sequence by a two-roll rolling mill, a first universal rolling mill, a second universal rolling mill, a first edge rolling mill, a third universal rolling mill, a first unequal diameter arc bending rolling mill, a fourth universal rolling mill, a second unequal diameter arc bending rolling mill, a second edge rolling mill, a third unequal diameter arc bending rolling mill, a fifth universal rolling mill, a fourth unequal diameter arc bending rolling mill, a third edge rolling mill, a fifth unequal diameter arc bending rolling mill, a sixth universal rolling mill, and a sixth unequal diameter arc bending rolling mill.

2. The method for producing arc-shaped hot-rolled H-beam according to claim 1, characterized in that: In step 1, the steel billet is placed in a heating furnace and heated to a temperature of M1 to M1+ΔM1, the steel billet is selected from one or both of hot billet and cold billet, wherein M1 is 1250 to 1290°C, ΔM1 is 20 to 40°C, and the heating time is 2.0 to 4.0 hours.

3. The method for producing arc-shaped hot-rolled H-beam according to claim 2, characterized in that: The heating furnace includes heating section 1, heating section 2, heating section 3 and soaking section from front to back, and the heating temperature of heating section 1 is controlled at M11~M11+ΔM11, wherein M11 is 960~1100℃, and ΔM11 is 20~120℃; the heating temperature of heating section 2 is controlled at M12~M12+ΔM12, wherein M12 is 1150~1290℃, and ΔM12 is 10-100℃; the heating temperature of heating section 3 is controlled at M13~M13+ΔM13, wherein M13 is 1260~1320℃, and ΔM13 is 10-100℃.

4. The method for producing arc-shaped hot-rolled H-beam according to claim 1, characterized in that: The starting temperature of rough rolling is M2~M2+ΔM2, where M2 is 1080~1160℃ and ΔM2 is 50~80℃; the starting temperature of finishing rolling is M3~M3+ΔM3, where M3 is 960~1050℃ and ΔM3 is 40~100℃; the final rolling temperature of finishing rolling is M4~M4+ΔM4, where M4 is 900~950℃ and ΔM4 is 70~120℃; the temperature of arc hot rolled H-beam at the water cooling outlet is 550~650℃.

5. The method for producing arc-shaped hot-rolled H-beam according to claim 4, characterized in that: In step 2, two water coolings and two air coolings are used, and the outlet temperature of the first water cooling is 720-820°C, the outlet temperature of the second water cooling is 550-650°C, and the outlet temperature of the first air cooling is 240-320°C.

6. A production line for arc-shaped hot-rolled H-beams using the production method according to any one of claims 1 to 5, characterized in that: It includes a heating furnace, a high-pressure water dephosphorization device, a roughing mill, a head-cutting flying shear, an arc-shaped finishing mill unit, a water-cooling unit, a hot sawing machine, an air-cooling unit and a bundling device.

7. The arc-shaped hot-rolled H-beam production line according to claim 6, characterized in that: The arc finishing mill group includes, in sequence, a two-roll mill, a first universal mill, a second universal mill, a first edge rolling mill, a third universal mill, a first unequal diameter bending mill, a fourth universal mill, a second unequal diameter bending mill, a second edge rolling mill, a third unequal diameter bending mill, a fifth universal mill, a fourth unequal diameter bending mill, a third edge rolling mill, a fifth unequal diameter bending mill, a sixth universal mill, and a sixth unequal diameter bending mill; the water cooling unit includes a first water cooling machine and a second water cooling machine, and the air cooling unit includes a first air cooling machine and a second air cooling machine; Among them, the third universal rolling mill, the first unequal diameter arc bending rolling mill, the fourth universal rolling mill, the second unequal diameter arc bending rolling mill, the second edge rolling mill, the third unequal diameter arc bending rolling mill, the fifth universal rolling mill, the fourth unequal diameter arc bending rolling mill, the third edge rolling mill, the fifth unequal diameter arc bending rolling mill, the sixth universal rolling mill, the sixth unequal diameter arc bending rolling mill, the first water cooler, the second water cooler, the hot saw machine, the first air cooler and the second air cooler are all arranged on the same arc; and the first unequal diameter arc bending rolling mill, the second unequal diameter arc bending rolling mill, the third unequal diameter arc bending rolling mill, the fourth unequal diameter arc bending rolling mill, the fifth unequal diameter arc bending rolling mill and the sixth unequal diameter arc bending rolling mill are all unequal diameter arc bending rolling mills with the same specifications; the first water cooler and the second water cooler are arc water cooling devices with the same specifications, and the first air cooler and the second air cooler are arc air cooling devices with the same specifications.

8. The arc-shaped hot-rolled H-beam production line according to claim 7, characterized in that: The unequal diameter bending arc rolling mill includes a rolling mill frame, a long diameter roller and a short diameter roller. The long diameter roller and the short diameter roller are at the same height and their center axes are vertically arranged. An arc rolling space for arc-shaped hot-rolled H-shaped steel to pass through is reserved between the outer circumferential surfaces of the long diameter roller and the short diameter roller. A driving mechanism for controlling the rotation of the long diameter roller and the short diameter roller is arranged on the rolling mill frame.

9. The arc-shaped hot-rolled H-beam production line according to claim 7, characterized in that: The arc-shaped water cooling device includes an arc-shaped transport roller, on which a water treatment system and a surface cleaning system are arranged in sequence from front to back. The water treatment system includes a water spray pipe, and the water spray pipe includes an upper water spray pipe and a lower water spray pipe arranged above and below the web of the arc-shaped hot-rolled H-shaped steel, and a left water spray pipe and a right water spray pipe arranged on the left and right flanges of the arc-shaped hot-rolled H-shaped steel. Nozzles are distributed on the upper water spray pipe, the lower water spray pipe, the left water spray pipe and the right water spray pipe on a side close to the arc-shaped hot-rolled H-shaped steel.

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