CN113680835A - Medium-specification deformed steel bar rolling and cooling control equipment and preparation process thereof - Google Patents
Medium-specification deformed steel bar rolling and cooling control equipment and preparation process thereof Download PDFInfo
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- CN113680835A CN113680835A CN202111105193.3A CN202111105193A CN113680835A CN 113680835 A CN113680835 A CN 113680835A CN 202111105193 A CN202111105193 A CN 202111105193A CN 113680835 A CN113680835 A CN 113680835A
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- water tank
- recovery section
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/74—Temperature control, e.g. by cooling or heating the rolls or the product
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0007—Cutting or shearing the product
Abstract
The invention discloses a controlled rolling and cooling device for medium-specification deformed steel bars and a preparation process thereof. Belonging to the field of metallurgy and comprising a feeding rack, a furnace feeding roller way, a heating furnace, a furnace discharging roller way, a roughing mill group, a No. 1 flying shear, a middle mill group, a No. 1 water tank, a No. 1 recovery section, a No. 2 flying shear, a pre-finishing mill group, a guide groove, a No. 2 water tank, a No. 2 recovery section, a No. 3 water tank, a No. 3 recovery section, a No. 4 water tank, a No. 4 recovery section, a No. 1 pinch roll, a No. 3 flying shear, a 320 cantilever finishing mill group, a No. 5 water tank, a No. 2 pinch roll, a No. 5 recovery section, a No. 3 pinch roll, a No. 6 water tank, a No. 6 recovery section, a No. 4 pinch roll, a double-length flying shear, a rod tail brake, a steel feeding device, a cooling bed, a sizing shear, a roller way after shearing, a cross-span rack, a conveying roller way and a finished product collecting rack which are connected; a plurality of groups of water tanks are arranged on a production line, and the rolled piece is cooled by water step by step; the temperature of the rolling mill entering the rolling mill set is controlled, and controlled cooling is carried out, so that the mechanical property of the finished product is ensured, and the addition of alloy elements of the continuous casting billet is reduced.
Description
Technical Field
The invention belongs to the technical field of metallurgy, and particularly relates to controlled rolling and controlled cooling equipment for medium-specification deformed steel bars and a preparation process thereof.
Background
At present, the rolling and cooling control of the thread steel production line of medium specification mainly adopts the following scheme: a water cooling device is arranged behind the finished product rack to control the temperature of the rolled piece without rolling control, and the process has the following defects: the rolling control and cooling control of the rolled piece are difficult to realize, the temperature difference exists in the finished product, the mechanical property of the finished product is poor, the grain structure which does not accord with the new national standard of the hot-rolled thread steel is easy to appear, and waste products are easy to generate.
On the other hand, the finishing mill group in the prior art adopts a 250-module rolling mill or a short stress path rolling mill, the temperature of a rolled piece after controlled rolling is low, and equipment is easy to damage due to insufficient equipment strength of the 250-module rolling mill; and the short stress path rolling mill has insufficient processing precision, and the size precision of the finished product of the rolled piece can be influenced when the speed of the rolled piece exceeds 18 m/s. Therefore, how to solve the above problems becomes a problem to be considered by the related art.
Disclosure of Invention
Aiming at the problems, the invention provides a medium-specification deformed steel bar controlled rolling and controlled cooling device, aiming at solving the problems that the controlled rolling and controlled cooling of products are difficult to realize, the mechanical properties of the products are poor, and waste products are easy to generate; meanwhile, the problem that the speed of a rolled piece cannot exceed 18m/s due to insufficient equipment strength of a 250-module rolling mill and insufficient machining precision of a short stress path rolling mill in the existing production process is solved.
The invention also aims to provide a preparation process thereof.
The technical scheme of the invention is as follows: the invention relates to a medium-specification deformed steel bar controlled rolling and cooling device which comprises a main rolling span (101) and a finished product span (102), wherein the main rolling span (101) and the finished product span (102) are arranged in the same span, and the finished product span (101) is arranged on the other side of the main rolling span (102).
Further, the main rolling span (101) comprises a feeding rack (1), a furnace entering roller way (2) is arranged on the feeding rack (1), a heating furnace (3) is arranged on the other side of the furnace entering roller way (2), a furnace discharging roller way (4) is arranged on the other side of the heating furnace (3) and on the side opposite to the furnace entering roller way (2), a roughing mill group (5) is arranged on the other side of the furnace discharging roller way (4), a middle mill group (7) is arranged on the other side of the roughing mill group (5), a No. 1 water tank (8) is arranged on the other side of the middle mill group (7), a No. 1 recovery section (9) is arranged on the other side of the No. 1 water tank (8), and a pre-finishing mill group (11) is arranged on the other side of the No. 1 recovery section (9).
Furthermore, a No. 1 flying shear (6) is arranged between the rough rolling unit (5) and the intermediate rolling unit (7) which are connected with each other;
and a No. 2 flying shear (10) is arranged between the mutually connected No. 1 recovery section (9) and the pre-finishing mill group (11).
Further, the finished product bay (102) comprises a guide groove (12) connected to the other side of the pre-finishing mill group (11), two ends of the other side of the guide groove (12) are respectively provided with a No. 2 water tank (13), the other side of the No. 2 water tank (13) is provided with a No. 2 recovery section (14), the other side of the No. 2 recovery section (14) is provided with a No. 3 water tank (15), the other side of the No. 3 water tank (15) is provided with a No. 3 recovery section (16), the other side of the No. 3 recovery section (16) is provided with a No. 4 water tank (17), the other side of the No. 4 water tank (17) is provided with a No. 4 recovery section (18), the other side of the No. 4 recovery section (18) is provided with a 320 cantilever finishing mill group (21), the other side of the 320 cantilever finishing mill group (21) is provided with a No. 5 water tank (22), and the other side of the No. 5 water tank (22) is provided with a No. 5 recovery section (24), a No. 6 water tank (26) is arranged on the other side of the No. 5 recovery section (24), a No. 6 recovery section (27) is arranged on the other side of the No. 6 water tank (26), a rod tail brake (30) is arranged on the other side of the No. 6 recovery section (27), and a steel feeding device (31) is arranged on the other side of the rod tail brake (30);
a cooling bed (32) is installed on the other side of the steel feeding devices (31) on two sides, the steel feeding devices (31) are installed on the cooling bed (32) together, a rear shearing roller bed (34) is installed on the other side of the cooling bed (32), a cross-span rack (35) is further installed on the rear shearing roller bed (34), a conveying roller bed (36) is installed on the other side of the cross-span rack (35), and a finished product collecting rack (37) is installed on the other side of the conveying roller bed (36).
Furthermore, a No. 1 pinch roll (19) and a No. 3 flying shear (20) are sequentially arranged between a No. 4 recovery section (18) and a 320 cantilever finishing mill group (21) which are connected with each other;
a No. 2 pinch roll (23) is arranged between a No. 5 water tank (22) and a No. 5 recovery section (24) which are connected with each other;
a No. 3 pinch roll (25) is arranged between the No. 5 recovery section (24) and the No. 6 water tank (26) which are connected with each other;
a No. 4 pinch roll (28) and a double-length flying shear (29) are sequentially arranged between a No. 6 recovery section (27) and a rod tail brake (30) which are connected with each other;
a fixed-length shear (33) is arranged between the cooling bed (32) and the shear rear roller bed (34) which are connected with each other.
Further, the preparation process of the medium-specification deformed steel bar controlled rolling and cooling equipment comprises the following specific steps:
(1) feeding rack (1) → medium rolling mill group (7):
the method comprises the following steps of (1) feeding rack → in-furnace roller way (2) → heating furnace (3) → out-furnace roller way (4) → roughing mill group (5) → No. 1 flying shear (6) → intermediate mill group (7);
(2) and No. 1 water tank (8) of controlled rolling and controlled cooling section → cooling bed (32):
bus: controlling rolling and cooling for the first time → controlling rolling and cooling for the second time → controlling cooling for the third time;
firstly, rolling and cooling control for the first time:
no. 1 water tank (8) → No. 1 recovery section (9) → No. 2 flying shears (10) → pre-finishing mill group (11);
secondly, rolling and cooling control:
the method comprises the following steps that a guide slot (12) → No. 2 water tank (13) → No. 2 recovery section (14) → No. 3 water tank (15) → No. 3 recovery section (16) → No. 4 water tank (17) → No. 4 recovery section (18) → No. 1 pinch roll (19) → No. 3 flying shear (20) → 320 cantilever finishing mill group (21);
controlling cold for the third time:
no. 5 water tank (22) → No. 2 pinch roll (23) → No. 5 recovery section (24) → No. 3 pinch roll (25) → No. 6 water tank (26) → No. 6 recovery section (27) → No. 4 pinch roll (28) → double-rule flying shear (29) → tail brake (30) → steel feeding device (31) → cold bed (32);
(3) sizing shears (33) → finished product collecting rack (37):
the length cutting device comprises a length cutting device (33) → a cut roller way (34) → an overspan table (35) → a conveying roller way (36) → a finished product collecting table (37) → finished product warehousing.
Further, in the step (1), the temperature of the heating furnace (3) is heated to 1050 ℃.
Further, in the step (2), the cooling temperature of each of the No. 1 water tank (8), the No. 2 water tank (13), the No. 3 water tank (15), the No. 4 water tank (17), the No. 5 water tank (22) and the No. 6 water tank (26) is 50 ℃ to 100 ℃.
Further, in the step (2), the temperature of the rolled piece is controlled to be 900-1000 ℃.
Further, in the step (2), the temperature of the cooling bed (32) is 700-800 ℃.
The invention has the beneficial effects that: according to the medium-specification deformed steel bar rolling and cooling control equipment, multiple groups of water tanks are arranged on a production line, water cooling is performed on a rolled piece step by step, the temperature of the rolling mill entering a rolling mill unit is controlled, and the rolled piece is controlled and cooled, so that the mechanical property of a finished product is ensured, and the addition of alloy elements of a continuous casting billet can be reduced, so that the production cost is reduced; meanwhile, the finishing mill group adopts a 320 cantilever rolling mill, so that the product has high dimensional precision, high production speed and high yield.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure, 1 is a feeding rack, 2 is a furnace-entering roller way, 3 is a heating furnace, 4 is a furnace-exiting roller way, 5 is a roughing mill group, 6 is a No. 1 flying shear, 7 is a middle mill group, 8 is a No. 1 water tank, 9 is a No. 1 recovery section, 10 is a No. 2 flying shear, and 11 is a pre-finishing mill group;
12 is a guide groove, 13 is a No. 2 water tank, 14 is a No. 2 recovery section, 15 is a No. 3 water tank, 16 is a No. 3 recovery section, 17 is a No. 4 water tank, 18 is a No. 4 recovery section, 19 is a No. 1 pinch roll, 20 is a No. 3 flying shear, 21 is a 320 cantilever finishing mill group, 22 is a No. 5 water tank, 23 is a No. 2 pinch roll, 24 is a No. 5 recovery section, 25 is a No. 3 pinch roll, 26 is a No. 6 water tank, 27 is a No. 6 recovery section, 28 is a No. 4 pinch roll, 29 is a double-length flying shear, 30 is a rod tail brake, 31 is a steel feeding device, 32 is a cooling bed, 33 is a fixed-length shear, 34 is a post-shearing roller way, 35 is a cross-span stand, 36 is a conveying roller way, and 37 is a finished product collecting stand;
101 is a main rolling span, and 102 is a finished product span.
Detailed Description
In order to more clearly illustrate the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings:
as shown in the figure; the invention relates to a medium-specification deformed steel bar controlled rolling and cooling device which comprises a main rolling span 101 and a finished product span 102, wherein the main rolling span 101 and the finished product span 102 are arranged in the same span, and the finished product span 101 is arranged on the other side of the main rolling span 102.
Further, the main rolling span 101 comprises a feeding rack 1, a furnace entering roller way 2 is arranged on the feeding rack 1, a heating furnace 3 is arranged on the other side of the furnace entering roller way 2, a furnace discharging roller way 4 is arranged on the other side of the heating furnace 3 and on the side opposite to the furnace entering roller way 2, a roughing mill group 5 is arranged on the other side of the furnace discharging roller way 4, a middle mill group 7 is arranged on the other side of the roughing mill group 5, a No. 1 water tank 8 is arranged on the other side of the middle mill group 7, a No. 1 recovery section 9 is arranged on the other side of the No. 1 water tank 8, and a pre-finishing mill group 11 is arranged on the other side of the No. 1 recovery section 9.
Furthermore, a No. 1 flying shear 6 is arranged between the rough rolling unit 5 and the middle rolling unit 7 which are connected with each other;
a number 2 flying shear 10 is installed between the interconnected number 1 recovery section 9 and the pre-finishing mill group 11.
Further, the finished span 102 includes a guide slot 12 connected to the other side of the pre-finishing mill group 11, two ends of the other side of the guide slot 12 are respectively provided with a No. 2 water tank 13, the other side of the No. 2 water tank 13 is provided with a No. 2 recovery section 14, the other side of the No. 2 recovery section 14 is provided with a No. 3 water tank 15, the other side of the No. 3 water tank 15 is provided with a No. 3 recovery section 16, the other side of the No. 3 recovery section 16 is provided with a No. 4 water tank 17, the other side of the No. 4 water tank 17 is provided with a No. 4 recovery section 18, the other side of the No. 4 recovery section 18 is provided with a 320 cantilever finishing mill group 21, the other side of the 320 cantilever finishing mill group 21 is provided with a No. 5 water tank 22, the other side of the No. 5 water tank 22 is provided with a No. 5 recovery section 24, the other side of the No. 5 recovery section 24 is provided with a No. 6 water tank 26, a No. 6 recovery section 27 is arranged on the other side of the No. 6 water tank 26, a rod tail brake 30 is arranged on the other side of the No. 6 recovery section 27, and a steel feeding device 31 is arranged on the other side of the rod tail brake 30;
a cooling bed 32 is arranged on the other side of the steel feeding devices 31 on the two sides, the steel feeding devices 31 are arranged on the cooling bed 32 together, a shearing roller bed 34 is arranged on the other side of the cooling bed 32, a cross-over rack 35 is further arranged on the shearing roller bed 34, a conveying roller bed 36 is arranged on the other side of the cross-over rack 35, and a finished product collecting rack 37 is arranged on the other side of the conveying roller bed 36.
Furthermore, a No. 1 pinch roll 19 and a No. 3 flying shear 20 are sequentially arranged between the No. 4 recovery section 18 and the 320 cantilever finishing mill group 21 which are connected with each other;
a No. 2 pinch roll 23 is arranged between the No. 5 water tank 22 and the No. 5 recovery section 24 which are connected with each other;
a No. 3 pinch roll 25 is arranged between the No. 5 recovery section 24 and the No. 6 water tank 26 which are connected with each other;
a No. 4 pinch roll 28 and a double-length flying shear 29 are sequentially arranged between a No. 6 recovery section 27 and a rod tail brake 30 which are connected with each other;
a shear 33 is mounted between the interconnected cooling bed 32 and a shear table 34.
Specifically, the controlled rolling and controlled cooling equipment for the medium-specification deformed steel bar comprises a main rolling span 101 and a finished product span 102 which are sequentially connected, a continuous casting blank enters a heating furnace 3 through a feeding rack 1 and a furnace entering roller way 2 to be heated, the heated blank is discharged through a furnace discharging roller way 4 and then is sent into a roughing mill unit 5 to be rolled, and the rolled piece after being rolled is cut by a number 1 flying shear 6 and then enters a medium rolling mill unit 7 to be rolled;
after the rolled piece which is rolled again by the middle rolling mill unit 7 enters the No. 1 water tank 8, the rolled piece is controlled and cooled, and is controlled and recovered following the No. 1 recovery section 9, after the rolled piece is cooled to the required temperature, the rolled piece is cut by the No. 2 flying shear 10 and enters the pre-finishing mill unit 11 for continuous rolling; controlling the temperature of the rolled piece entering the pre-finishing mill group 11, and realizing controlled rolling and controlled cooling rolling on the rolled piece so as to realize controlled rolling and controlled cooling for the first time;
after the rolled piece passes through the pre-finishing mill group 11, the rolled piece is sequentially conveyed to equipment such as a No. 2 water tank 13, a No. 2 recovery section 14, a No. 3 water tank 15, a No. 3 recovery section 16, a No. 4 water tank 17, a No. 4 recovery section 18 and the like through a guide groove 12, the rolled piece is sequentially cooled step by step, the rolled piece is controlled to enter the temperature of a 320 cantilever finishing mill group 21, and controlled rolling and controlled cooling rolling are carried out on the rolled piece again, so that secondary controlled rolling and controlled cooling are realized; the rolled piece after temperature control is clamped by a No. 1 pinch roll 19, and enters a 320 cantilever finishing mill group 21 to be rolled into a finished product size after being cut by a No. 3 flying shear 20;
after the rolled piece is rolled into a finished product by a 320-cantilever finishing mill group 21, the finished product enters equipment such as a No. 5 water tank 22, a No. 6 water tank 26, a No. 6 recovery section 27 and the like, and the finished rolled piece is cooled by controlling step by step again to control the temperature of a cooling bed 32 on the finished rolled piece; at this moment, the rolled piece is subjected to rolling control twice, so that the third controlled cooling is realized, and the rolled piece has good mechanical property; meanwhile, a No. 2 pinch roll 23 and a No. 3 pinch roll 25 are respectively arranged at the outlet of the No. 5 water tank 22 and the inlet of the No. 6 water tank 26, and are used for clamping a rolled piece, so that the stability of the rolled piece is ensured;
the finished product rolled piece subjected to the third controlled cooling is clamped by a No. 4 pinch roll 28 and is sent to a multiple length shear 29 to be cut into multiple lengths (multiple length shearing), the multiple length rolled piece subjected to the multiple length shearing is clamped and braked by a rod tail brake 30, and then the multiple length rolled piece is sent to a cooling bed 32 by a steel feeding device 31 to be continuously cooled by air; the finished product is cut into a fixed length by a fixed length shear 33 after being put on a cooling bed 32, and then is conveyed to a finished product collecting rack 37 by a shear roller way 34, a cross rack 35 and a conveying roller way 36 for collection, and finally the finished product is stored in a warehouse.
Further, the preparation process of the medium-specification deformed steel bar controlled rolling and controlled cooling equipment comprises the following process lines:
(1) feeding rack 1 → middle rolling mill group 7:
the feeding rack 1 → the furnace entering roller way 2 → the heating furnace 3 → the furnace exit roller way 4 → the roughing mill group 5 → the No. 1 flying shear 6 → the middle mill group 7;
(2) and a controlled rolling and controlled cooling section:
bus: controlling rolling and cooling for the first time → controlling rolling and cooling for the second time → controlling cooling for the third time;
firstly, rolling and cooling control for the first time:
no. 1 water tank 8 → No. 1 recovery section 9 → No. 2 flying shear 10 → pre-finishing mill group 11;
secondly, rolling and cooling control:
the guide groove 12 → the No. 2 water tank 13 → the No. 2 recovery section 14 → the No. 3 water tank 15 → the No. 3 recovery section 16 → the No. 4 water tank 17 → the No. 4 recovery section 18 → the No. 1 pinch roll 19 → the No. 3 flying shear 20 → 320 cantilever finishing mill group 21;
controlling cold for the third time:
no. 5 water tank 22 → No. 2 pinch roller 23 → No. 5 recovery section 24 → No. 3 pinch roller 25 → No. 6 water tank 26 → No. 6 recovery section 27 → No. 4 pinch roller 28 → double-length flying shear 29 → rod tail brake 30 → steel feeding device 31 → cooling bed 32;
(3) the sizing scissors 33 → the finished product collecting stand 37:
the sizing shears 33 → the rear shearing roller way 34 → the spanning rack 35 → the conveying roller way 36 → the finished product collecting rack 37 → the finished product is put in storage.
Wherein the heating furnace 3 is heated to 1050 ℃.
The cooling temperature of each of the No. 1 water tank 8, the No. 2 water tank 13, the No. 3 water tank 15, the No. 4 water tank 17, the No. 5 water tank 22 and the No. 6 water tank 26 is 50-100 ℃.
The temperature of the rolled piece is controlled to be 900-1000 ℃.
The temperature of the cooling bed 32 is 700 ℃ to 800 ℃.
The specific preparation steps of the process are as follows:
(1) the continuous casting billet passes through a feeding rack 1 and a furnace roller way 2 and then enters a heating furnace 3 for heating, the heating is carried out to 1050 ℃, the continuous casting billet passes through a furnace roller way 4 after being discharged from the furnace and then is rolled by a roughing mill set 5, and the continuous casting billet enters a medium rolling mill set 7 for continuous rolling after being sheared by a No. 1 flying shear 6;
(2) the rolled piece rolled by the intermediate mill group 7 enters a No. 1 water tank 8 and a No. 1 recovery section 9 for controlled cooling, the cooling temperature of the No. 1 water tank 8 is 50-100 ℃, the temperature of the rolled piece is 900-1000 ℃, and the rolled piece enters a pre-finishing mill group 11 for continuous rolling after being cut by a No. 2 flying shear 10;
(3) after the rolled piece exits the pre-finishing mill group 11, the rolled piece enters a No. 2 water tank 13, a No. 2 recovery section 14, a No. 3 water tank 15, a No. 3 recovery section 16, a No. 4 water tank 17, a No. 4 recovery section 18 and the like through a guide groove 12;
further performing controlled rolling cooling on the rolled piece, wherein the cooling temperature of each water tank is 50-100 ℃, the temperature of the controlled rolling rolled piece entering a 320 cantilever finishing mill group 21 is 900-1000 ℃, and the rolled piece enters the 320 cantilever finishing mill group 21 to be rolled into a finished product size after being cut by a No. 3 flying shear 20 through a No. 1 pinch roll 19;
(4) the finished rolled piece is taken out of the 320 cantilever finishing mill unit 21 and then enters equipment such as a No. 5 water tank 22, a No. 2 pinch roll 23, a No. 5 recovery section 24, a No. 3 pinch roll 25, a No. 6 water tank 26, a No. 6 recovery section 27, a No. 4 pinch roll 28, a cooling bed 32 and the like, and the rolled piece is controlled and cooled again, wherein the cooling temperature of each water tank is 50-100 ℃, and the temperature of the cooling bed 32 on the finished rolled piece is controlled to be 700-800 ℃;
(5) the device such as a multiple-length flying shear 29, a rod tail brake 30 and the like are arranged in front of the cooling bed 32, and the multiple-length shearing and braking are carried out on the finished rolled pieces; after the finished rolled pieces are put on a cooling bed 32, cut to length by a length-fixing shear 33, conveyed to a finished product collecting rack 37 by a shear roller way 34, a cross-over rack 35 and a conveying roller way 36 for collection, and finally the collected finished products are put in storage.
Further, the specification of the manufactured product is as follows:
the above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. The utility model provides a well specification screw-thread steel accuse rolling accuse cooling device which characterized in that: comprises a main rolling span (101) and a finished product span (102), wherein the main rolling span (101) and the finished product span (102) are arranged in the same span, and the finished product span (101) is arranged on the other side of the main rolling span (102).
2. The controlled rolling and cooling equipment for medium-specification deformed steel bars according to claim 1, is characterized in that: the main rolling span (101) comprises a feeding rack (1), a furnace entering roller way (2) is arranged on the feeding rack (1), a heating furnace (3) is arranged on the other side of the furnace entering roller way (2), a furnace discharging roller way (4) is arranged on the other side of the heating furnace (3) and on the side opposite to the furnace entering roller way (2), a roughing mill set (5) is arranged on the other side of the furnace discharging roller way (4), a middle mill set (7) is arranged on the other side of the roughing mill set (5), a No. 1 water tank (8) is arranged on the other side of the middle mill set (7), a No. 1 recovery section (9) is arranged on the other side of the No. 1 water tank (8), and a pre-finishing mill set (11) is arranged on the other side of the No. 1 recovery section (9).
3. The controlled rolling and cooling equipment for medium-specification deformed steel bars according to claim 2, is characterized in that: a No. 1 flying shear (6) is arranged between the rough rolling unit (5) and the intermediate rolling unit (7) which are connected with each other;
and a No. 2 flying shear (10) is arranged between the mutually connected No. 1 recovery section (9) and the pre-finishing mill group (11).
4. The controlled rolling and cooling equipment for medium-specification deformed steel bars according to claim 1, is characterized in that:
the finished product span (102) comprises a guide groove (12) connected to the other side of a pre-finishing mill group (11), two ends of the other side of the guide groove (12) are respectively provided with a No. 2 water tank (13), the other side of the No. 2 water tank (13) is provided with a No. 2 recovery section (14), the other side of the No. 2 recovery section (14) is provided with a No. 3 water tank (15), the other side of the No. 3 water tank (15) is provided with a No. 3 recovery section (16), the other side of the No. 3 recovery section (16) is provided with a No. 4 water tank (17), the other side of the No. 4 water tank (17) is provided with a No. 4 recovery section (18), the other side of the No. 4 recovery section (18) is provided with a 320 cantilever finishing mill group (21), the other side of the 320 cantilever finishing mill group (21) is provided with a No. 5 water tank (22), and the other side of the No. 5 water tank (22) is provided with a No. 5 recovery section (24), a No. 6 water tank (26) is arranged on the other side of the No. 5 recovery section (24), a No. 6 recovery section (27) is arranged on the other side of the No. 6 water tank (26), a rod tail brake (30) is arranged on the other side of the No. 6 recovery section (27), and a steel feeding device (31) is arranged on the other side of the rod tail brake (30);
a cooling bed (32) is installed on the other side of the steel feeding devices (31) on two sides, the steel feeding devices (31) are installed on the cooling bed (32) together, a rear shearing roller bed (34) is installed on the other side of the cooling bed (32), a cross-span rack (35) is further installed on the rear shearing roller bed (34), a conveying roller bed (36) is installed on the other side of the cross-span rack (35), and a finished product collecting rack (37) is installed on the other side of the conveying roller bed (36).
5. The controlled rolling and cooling equipment for medium-specification deformed steel bars according to claim 4, is characterized in that: a No. 1 pinch roll (19) and a No. 3 flying shear (20) are sequentially arranged between a No. 4 recovery section (18) and a 320 cantilever finishing mill group (21) which are connected with each other;
a No. 2 pinch roll (23) is arranged between a No. 5 water tank (22) and a No. 5 recovery section (24) which are connected with each other;
a No. 3 pinch roll (25) is arranged between the No. 5 recovery section (24) and the No. 6 water tank (26) which are connected with each other;
a No. 4 pinch roll (28) and a double-length flying shear (29) are sequentially arranged between a No. 6 recovery section (27) and a rod tail brake (30) which are connected with each other;
a fixed-length shear (33) is arranged between the cooling bed (32) and the shear rear roller bed (34) which are connected with each other.
6. The preparation process of the medium-specification deformed steel bar controlled rolling and cooling equipment as claimed in claims 1 to 5, wherein the specific preparation process comprises the following steps:
(1) feeding rack (1) → medium rolling mill group (7):
the method comprises the following steps of (1) feeding rack → in-furnace roller way (2) → heating furnace (3) → out-furnace roller way (4) → roughing mill group (5) → No. 1 flying shear (6) → intermediate mill group (7);
(2) and No. 1 water tank (8) of controlled rolling and controlled cooling section → cooling bed (32):
bus: controlling rolling and cooling for the first time → controlling rolling and cooling for the second time → controlling cooling for the third time;
firstly, rolling and cooling control for the first time:
no. 1 water tank (8) → No. 1 recovery section (9) → No. 2 flying shears (10) → pre-finishing mill group (11);
secondly, rolling and cooling control:
the method comprises the following steps that a guide slot (12) → No. 2 water tank (13) → No. 2 recovery section (14) → No. 3 water tank (15) → No. 3 recovery section (16) → No. 4 water tank (17) → No. 4 recovery section (18) → No. 1 pinch roll (19) → No. 3 flying shear (20) → 320 cantilever finishing mill group (21);
controlling cold for the third time:
no. 5 water tank (22) → No. 2 pinch roll (23) → No. 5 recovery section (24) → No. 3 pinch roll (25) → No. 6 water tank (26) → No. 6 recovery section (27) → No. 4 pinch roll (28) → double-rule flying shear (29) → tail brake (30) → steel feeding device (31) → cold bed (32);
(3) sizing shears (33) → finished product collecting rack (37):
the length cutting device comprises a length cutting device (33) → a cut roller way (34) → an overspan table (35) → a conveying roller way (36) → a finished product collecting table (37) → finished product warehousing.
7. The process for preparing a medium-gauge deformed steel bar controlled rolling and cooling device according to claim 6, wherein the temperature of the heating furnace (3) is heated to 1050 ℃ in the step (1).
8. The process for preparing medium-specification deformed steel bar rolling and cooling control equipment according to claim 6, wherein in the step (2), the cooling temperature of each of the No. 1 water tank (8), the No. 2 water tank (13), the No. 3 water tank (15), the No. 4 water tank (17), the No. 5 water tank (22) and the No. 6 water tank (26) is 50-100 ℃.
9. A process for preparing a medium gauge deformed steel bar controlled rolling and controlled cooling apparatus according to claim 6, characterized in that in step (2), the temperature of the control rolled piece is 900-1000 ℃.
10. The process for preparing a medium gauge deformed steel bar controlled rolling and cooling equipment according to claim 6, wherein in the step (2), the temperature of the cooling bed (32) is 700-800 ℃.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115625197A (en) * | 2022-10-14 | 2023-01-20 | 西咸新区致诚泰金属科技有限公司 | BT line rolling process and BT line rolling device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115625197A (en) * | 2022-10-14 | 2023-01-20 | 西咸新区致诚泰金属科技有限公司 | BT line rolling process and BT line rolling device |
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