CN213915464U - Efficient bar rolling production line - Google Patents
Efficient bar rolling production line Download PDFInfo
- Publication number
- CN213915464U CN213915464U CN202022669424.0U CN202022669424U CN213915464U CN 213915464 U CN213915464 U CN 213915464U CN 202022669424 U CN202022669424 U CN 202022669424U CN 213915464 U CN213915464 U CN 213915464U
- Authority
- CN
- China
- Prior art keywords
- rolling
- horizontal
- vertical
- mill
- water tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Metal Rolling (AREA)
Abstract
The utility model belongs to the technical field of the steel is rolling, a high-efficient rolling production line of rod is specifically disclosed. The production line comprises a roughing mill group, a flying shear, a middle mill group, a No. 1 temperature control water tank, a flying shear, a first finishing mill group, a No. 2 temperature control water tank, a flying shear, a second finishing mill group, a No. 3 temperature control water tank and a flying shear which are sequentially arranged along the rolling direction; the roughing mill group and the middle mill group comprise a plurality of rolling mills which are alternately arranged in a horizontal-vertical or vertical-horizontal mode, the first finishing mill group comprises 6 rolling mills which are sequentially arranged in a horizontal-vertical-horizontal/vertical-horizontal mode, and the second finishing mill group comprises 3 rolling mills which are sequentially arranged in a horizontal-horizontal/vertical mode. Adopt this production line can carry out multi-thread rolling production such as single rod and 2 ~ 6 lines, the utility model discloses satisfy little, medium, big specification twisted steel's high-efficient production, can reduce alloy element and add reduction in production cost simultaneously improving the productivity.
Description
Technical Field
The utility model relates to a rolling technical field of steel especially relates to a high-efficient rolling production line of rod.
Background
With the development and progress of the country, the construction twisted steel bar cannot be used for large-scale infrastructure and urbanization construction. The yield of the twisted steel in 2019 is over 2 hundred million tons, which accounts for 20 percent of the total production energy of steel in China and 40 percent of the production energy of long products. The elimination of low-strength steel bars and the popularization of high-strength and high-performance steel bars are the main trends in domestic markets, and the state promulgates a new standard, part 2 of steel for reinforced concrete, at the end of 2018: hot rolling ribbed steel bar.
In order to realize the high strength performance of deformed steel bar products, there are 3 main production processes at present:
(1) and (3) realizing an on-line quenching-self-tempering process by a post-rolling strong water-penetrating process to obtain a comprehensive structure of core pearlite and an appearance martensite ring layer. The production process is definitely forbidden when producing new corresponding national standard products in China. Only the English standard reinforcing steel bars and other products allowed by national and industrial standards can be produced.
(2) The performance requirement of the standard on the steel bar product is met by fine grain strengthening through the conventional rolling process of adding alloy elements. The production process has higher addition amount of alloy components, not only increases the raw material cost of production enterprises, but also brings more consumption requirements to the existing alloy raw material resources, and is not beneficial to the harmonious development of earth resources.
(3) The deformation temperature of the final forming gate is controlled by a controlled rolling and controlled cooling process, and the microscopic crystal grains of the final product are fine and uniform by controlled cooling measures after rolling, and the requirements on the final mechanical property of the product are met by adopting a fine grain strengthening means according to the Hall-Peltier principle.
In the steel bar production process, in order to improve the production efficiency and reduce the production cost and the energy consumption cost, the steel bars with the specification of less than phi 28mm are generally produced by adopting a 2-6 slitting rolling process, and the steel bars with the specification of more than phi 28mm are generally produced by adopting a single rolling process. When the splitting rolling process is adopted, in order to ensure the stability of facilities such as splitting pass hole patterns, guides and guards and the like and improve the service life and the production efficiency of consumable parts, the temperature of a rolled piece is generally controlled to be more than 900 ℃ during splitting rolling. A typical production line configuration of this conventional slit bar deformed steel bar production process is shown in fig. 1. According to a steel rolling process system, a structure transformation theory and production actual performance feedback data, the production process controls the rolling temperature of the final forming pass to be about 780 ℃ as much as possible in order to obtain a deformed steel bar product with higher performance and finer grains, and is provided with a post-rolling weak cooling process to avoid forming a martensite structure. The deformed steel bar product obtained by the production process can meet the requirements of new national standards on the product structure performance, and can effectively reduce the alloy addition cost of production raw materials. However, in such a process, the common high-temperature bar slitting process and the production line configuration cannot be realized, and usually, the bar slitting process and the production line configuration need to be realized through the configuration of a single high bar and a double high bar. A typical line configuration for this process of producing slit high speed bar deformed steel bar is shown in fig. 2.
At present, after the issuance of new national standards, production enterprises are exploring production processes and production line configurations capable of covering the requirements of products of various specifications, so that the production of deformed steel bar products of various specifications meeting the requirements of related standards can be realized through a single production line configuration.
SUMMERY OF THE UTILITY MODEL
In view of the above prior art's shortcoming, the utility model aims to provide a high-efficient rolling production line of rod can cover little, well, the high-efficient production of big specification twisted steel, can satisfy the multi-thread segmentation of little specification to improve the productivity, can satisfy the double-thread segmentation and the accuse of well specification again and roll the accuse cold, reduce the alloying element addition when improving the productivity, can also satisfy the single rolling accuse of big specification and roll the accuse cold, reduction in production cost when improving the productivity.
In order to achieve the above and other related objects, a first aspect of the present invention provides a high efficiency rolling line for bar materials, comprising a roughing mill set, a flying shear, a middle mill set, a 1# temperature control water tank, a flying shear, a first finishing mill set, a 2# temperature control water tank, a flying shear, a second finishing mill set, a 3# temperature control water tank, and a flying shear, which are sequentially arranged along a rolling direction, wherein the roughing mill set comprises a plurality of rolling mills with horizontal-vertical or vertical-horizontal alternately arranged frames, the middle mill set comprises a plurality of rolling mills with horizontal-vertical or vertical-horizontal alternately arranged frames, the first finishing mill set comprises 6 rolling mills with horizontal-vertical-horizontal/vertical-horizontal sequentially arranged frames, the second finishing mill set comprises 3 rolling mills with horizontal-horizontal/vertical sequentially arranged, and the 4 th rolling mill of the first finishing mill group and the 3 rd rolling mill of the second finishing mill group are both horizontal-vertical double-station combined type rolling mills.
Further, the roughing mill group comprises 6-8 rolling mills which are alternately arranged in a horizontal-vertical or vertical-horizontal mode.
Further, the medium rolling mill group comprises 4-6 rolling mills which are alternately arranged in a horizontal-vertical or vertical-horizontal mode.
Furthermore, the production line also comprises a feeding rack, a heating furnace and heated phosphorus removal equipment which are arranged in front of the roughing mill group and are sequentially arranged along the rolling direction.
Further, the production line still including set up in 3# accuse temperature water tank and flying shear after and along rolling direction cold bed, cold shears, cross the rack, check and bundle collecting device and off-line that arrange in order.
Further, 1# accuse temperature water tank is 1 ~ 2 section formula accuse temperature water tank, 2# accuse temperature water tank is 2 ~ 4 section formula accuse temperature water tank 3# accuse temperature water tank is 3 ~ 6 section formula accuse temperature water tank.
Further, 1# accuse temperature water tank is two segmentation accuse temperature water tanks, 2# accuse temperature water tank is three segmentation accuse temperature water tanks, 3# accuse temperature water tank is six segmentation accuse temperature water tanks.
Further, the horizontal-vertical double-station combined rolling mill comprises a rolling mill, rolling mill spigots, a gear box, a main motor and a rolling mill support, wherein the number of the rolling mill spigots is two, one of the rolling mill spigots is horizontally arranged, and the other rolling mill spigots is vertically arranged; the rolling mill is provided with a horizontal station and a vertical station, and is connected with a horizontally arranged rolling mill connecting shaft when positioned at the horizontal station, and is connected with a vertically arranged rolling mill connecting shaft when positioned at the vertical station; each rolling mill connecting shaft is correspondingly provided with a gear box and a main motor, and the main motor, the gear box and the rolling mill connecting shaft are sequentially in transmission connection.
As the above, the utility model discloses a high-efficient rolling production line of rod has following beneficial effect:
the utility model provides a novel rod rolling technology and production line can cover little, medium, the high-efficient production of big specification twisted steel, can satisfy the multi-thread segmentation of little specification and improve the productivity, can satisfy the double-thread segmentation and the accuse of well specification again and roll the accuse cold, can also satisfy the single rolling accuse of big specification and roll the accuse cold, reduce the alloying element and add simultaneously improving the productivity to reduction in production cost. Through the reasonable optimization configuration of arranging and rolling mill of rolling production line, the utility model discloses a production line has realized the high-efficient production of single rod and 2 ~ 6 segmentation rod to can realize the decrement optimization of rod alloy composition, improve the productivity effect of enterprise.
Drawings
Fig. 1 is a schematic view showing a typical line layout of a conventional process for producing a deformed steel bar of a slit bar.
Fig. 2 shows a typical production line layout of the novel production process of the slitting high-speed bar deformed steel bar.
Fig. 3 is a schematic view of the production line layout of the efficient rolling process for bars according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a horizontal-vertical double-station combined rolling mill according to an embodiment of the present invention, in which a diagram a is a vertical rolling mill state, and a diagram B is a horizontal rolling mill state.
Fig. 5 is a schematic diagram of a high-efficiency rolling process for bars according to an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein. The present invention can also be implemented or applied through other different specific embodiments, and various details in the present specification can be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the invention in a schematic manner, and only the components related to the invention are shown in the drawings instead of the actual implementation of the invention, the shapes, the amounts and the proportions of the components may be changed arbitrarily according to the number, the shapes and the sizes of the components in the actual implementation, and the layout of the components may be more complicated. The structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention does not have the substantial significance in the technology, and any structure modification, ratio relationship change or size adjustment should still fall within the scope which can be covered by the technical content disclosed by the present invention without affecting the efficacy which can be produced by the present invention and the purpose which can be achieved by the present invention. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.
Description of reference numerals:
the device comprises a feeding rack 1, a heating furnace 2, a roughing mill group 3, a flying shear 4, a middle mill group 5, a 1# temperature control water tank 6, a first finishing mill group 7, a 2# temperature control water tank 8, a second finishing mill group 9, a 3# temperature control water tank 10, a cooling bed 11, a cold shear 12, a cross-over rack 13, a checking bundling collecting device 14, a lower wire 15, a rolling mill 101 rolling mill spindle 102, a gear box 103, a main motor 104 and a rolling mill support 105.
The specific implementation process is as follows:
the utility model provides a high-efficient rolling production line of rod arrange the schematic diagram as shown in fig. 3, the virtual frame front portion is conventional systems such as the required material loading rack 1 that sets up of rod production line, heating furnace 2, heating back descaling equipment, and virtual frame rear portion is other conventional systems such as the required cooling bed 11 that sets up of rod production line, cuts, crosses rack 13, inspection bundle collecting device 14, rolls off the production line 15 for the crossing. The utility model discloses a high-efficient rolling production line of rod still includes as the partial system in the virtual frame shown in fig. 3, include the roughing mill group 3, flying shear 4, well rolling mill group 5, 1# accuse temperature water tank 6, flying shear 4, first finishing mill group 7, 2# accuse temperature water tank 8, flying shear 4, second finishing mill group 9, 3# accuse temperature water tank 10, flying shear 4 that arrange in order along rolling direction, specifically as follows:
(1) the roughing mill group 3 is provided with 6-8 rolling mills, the specific number is set according to the requirements of blank selection and rolled piece section reduction, and the arrangement form of the rolling mills of the roughing mill group 3 is horizontal-vertical or vertical-horizontal in sequence and alternately arranged.
(2) The middle rolling mill group 5 is provided with 4-6 rolling mills, the specific number is set according to the requirements of blank selection and rolled piece section reduction, and the arrangement form of the rolling mills of the middle rolling mill group 5 is horizontal-vertical or vertical-horizontal in turn and alternately arranged.
(3) The first finishing mill group 7 is provided with 6 rolling mills, the arrangement form of the rolling mills is horizontal-vertical-horizontal/vertical-horizontal, wherein the 4 th rolling mill is a horizontal-vertical double-station combined type rolling mill, namely, a rolling mill structure with 2 different stations, vertical and horizontal, is arranged in the position space of one rolling mill, and the structure is shown in figure 4. The setting of form is constituteed to this kind of rolling mill, the utility model discloses a production line both can satisfy the production demand of multi-thread segmentation rolling technology such as 2, 3, 4 lines, can satisfy the production demand of single rolling technology again.
(4) The second finishing mill group 9 is provided with 3 rolling mills in a horizontal-horizontal/vertical arrangement, wherein the 3 rd rolling mill is a horizontal-vertical double-station combined rolling mill, that is, in the space of one rolling mill position, a rolling mill structure with 2 different stations, vertical and horizontal, is provided, and the structure is shown in fig. 4. Under the arrangement of the rolling mill forming form, the production line of the utility model can satisfy the controlled rolling of single and 2, 3, 4 lines and other multi-line segmentation rolling processes.
(5) A flying shear 4 for cutting the head/tail is arranged behind each unit, and a flying shear 4 for cutting the multiple length is arranged behind the last unit (namely the second finishing mill unit 9).
(6) 1# temperature control water tanks 6 containing different quantities of cold water tanks are arranged behind the middle rolling mill group 5, the first finishing mill group 7 and the finishing mill group, so that the whole-process temperature control of the rolled piece is realized, and the cold control and the rolling control of single rolling and multi-line splitting are realized by matching with the arrangement of the rolling mill form. Specifically, in the production line shown in fig. 3, the 1# temperature control water tank 6 is a two-stage temperature control water tank, the 2# temperature control water tank 8 is a three-stage temperature control water tank, and the 3# temperature control water tank 10 is a six-stage temperature control water tank.
As shown in fig. 4, the horizontal-vertical double-station combined rolling mill comprises a rolling mill, rolling mill spigots, a gear box 103, a main motor 104 and a rolling mill support 105, wherein two rolling mill spigots are arranged, one rolling mill spigots is arranged horizontally, and the other rolling mill spigots is arranged vertically; the rolling mill has two stations, namely a horizontal station and a vertical station, and is connected with the mill spigots arranged horizontally when the rolling mill is positioned at the horizontal station (in the state shown in figure 4-B), and is connected with the mill spigots arranged vertically when the rolling mill is positioned at the vertical station (in the state shown in figure 4-A). Each mill connecting shaft is correspondingly provided with a gear box 103 and a main motor 104, the gear box 103 and the mill connecting shaft are sequentially in transmission connection, and the main motor 104 drives the mill connecting shaft to operate through the gear box 103, so that the mill works. The horizontal-vertical double-station combined rolling mill has two stations, namely a horizontal station and a vertical station, and can be switched according to actual production requirements.
Adopt the utility model discloses a process route of the high-efficient rolling production line production rod of rod is shown in fig. 5, technology includes following step:
(1) feeding the blank through a feeding rack 1, heating the blank in a heating furnace 2 to a discharging temperature (950-1000 ℃) and then entering a rolling area; firstly, the steel is rolled by a roughing mill group 3, and then is cut by a flying shear 4, and then enters a middle mill group 5 for rolling, and then enters a first finishing mill group 7 after being cooled by water, controlled in temperature, and cut by the flying shear 4.
Wherein the temperature of the rolled piece after being subjected to water cooling temperature control when entering the first finishing mill group 7 is controlled to be 820-880 ℃.
(2) The first finishing mill group 7 and the second finishing mill group 9 are used for rolling and splitting and are divided into the following conditions:
firstly, when a single piece is rolled, the horizontal-vertical double-station combined type rolling mills of the first finishing mill group 7 and the second finishing mill group 9 are both vertical stations; the rolled piece is subjected to 4-pass horizontal-vertical alternate rolling deformation by a front 4 rolling mills of a first finishing mill group 7, and is subjected to water-cooling temperature control and flying shear 4 crop after a rear 2 rolling mills are empty, then is subjected to rolling forming by a 1 st rolling mill of a second finishing mill group 9 and a rear 2 rolling mills to form a single rolled piece, and finally the temperature of the rolled piece is further controlled by water-cooling temperature control to inhibit the growth of crystal grains of internal tissues, so that a final fine-grain bar product is formed.
When the second slitting rolling is carried out, the horizontal-vertical double-station combined type rolling mill of the first finishing mill group 7 is a horizontal station, and the horizontal-vertical double-station combined type rolling mill of the second finishing mill group 9 is a vertical station; the rolled piece is subjected to horizontal-vertical rolling deformation by a first finishing mill group 7 with front 1-2 rolling mills, double cutting by the front 3-4 rolling mills, horizontal-horizontal rolling deformation by the rear 5-6 rolling mills, water-cooling temperature control and flying shear 4 end cutting, then the rolled piece is subjected to air-passing by a first finishing mill group 9 with the 1 st rolling mill and horizontal-vertical rolling molding by the rear 2 rolling mills to form a double rolled piece, and finally the temperature of the rolled piece is further controlled by water-cooling temperature control to inhibit the crystal grains of the internal structure from growing up, thereby forming a final fine grain bar product.
When multi-segmentation rolling is carried out, the horizontal-vertical double-station combined rolling mills of the first finishing mill group 7 and the second finishing mill group 9 are both horizontal stations; the rolled piece is firstly rolled and deformed and pre-cut in a plurality of passes by a first finishing mill group 7, then water-cooling temperature control and flying shear 4 are carried out to cut ends, then the rolled piece is rolled and formed into a plurality of rolled pieces in a plurality of passes by a second finishing mill group 9, finally the temperature of the rolled piece is further controlled by water-cooling temperature control, the growth of crystal grains of internal tissues is inhibited, and a final fine-grain bar product is formed.
Further, when the multi-splitting rolling is three-splitting rolling and four-splitting rolling, the rolled piece is horizontally rolled by the horizontally arranged rolling mills in the front 4 frames of the first finishing mill group 7, pre-split by the 5 th rolling mill, and water-cooled for temperature control after the 6 th rolling mill is empty, and then is multi-split by the 1 st rolling mill of the second finishing mill group 9, and is rolled and formed into a plurality of rolled pieces by the back 2 rolling mills.
In addition, more lines of cutting can be flexibly selected according to specification and capacity, and the production process of five-cutting and six-cutting can be met by adjusting the number of cutting rolling mills.
Specifically, in the step (2), the temperature of the rolled piece after being subjected to water cooling temperature control when entering the second finishing mill group 9 needs to meet the required temperature for fine grain rolling, and due to the fact that the rolled piece is slit rolled in the first rolling mill of the second finishing mill group 9 and subjected to slit rolling stability, cost control and the like, the temperature of the rolled piece entering the second finishing mill group 9 is not too low, and is generally 750-850 ℃.
Wherein, the rolling in the process is twist-free rolling.
(3) After the final fine-grain bar product is cut at a high speed by multiple length or fixed length, the finished product rolled piece is cooled by a cooling bed 11 assisted by facilities such as a roller way, a brake and the like.
(4) After the cooling bed 11 is cooled, the fixed-length rolled piece can be directly bundled by facilities such as a spanning rack 13, an inspection bundling and collecting device 14 and the like, and is off-line 15 for piling; the multiple length rolled pieces are cut by a fixed length cold shear 12, bundled by a straddle frame 13, an inspection bundling and collecting device 14 and the like, and stocked off line 15.
The following embodiment is adopted the utility model discloses a high-efficient rolling production line of rod produces the concrete application of rod.
Example 1
The present embodiment is a single rolling process of a bar, and with reference to fig. 3, fig. 4 and fig. 5, a specific route is as follows:
1. the blank is fed by a feeding rack 1, enters a heating furnace 2, is heated to the tapping temperature (generally 950-1000 ℃) and then enters a core rolling area.
2. The blank is firstly subjected to horizontal-vertical alternate non-twist rolling by a roughing mill group 3 comprising 6-8 rolling mills, and a roughly rolled middle section is rolled.
3. The roughly rolled piece is subjected to head cutting by flying shears 4 and then enters a middle rolling mill unit 5 containing 4-6 rolling mills to be subjected to horizontal-vertical alternative non-twist rolling, the middle section after the middle rolling is rolled out, then is subjected to water cooling temperature control by a No. 1 temperature control water tank 6, and enters a first finishing mill unit 7 after being subjected to head cutting by the flying shears 4. The temperature of the rolled piece after water cooling temperature control is controlled to be about 820 ℃.
4. When a rolled piece enters a first finishing mill group 7 containing 6 rolling mills, wherein the 4 th rolling mill, namely a horizontal-vertical double-station combined rolling mill adopts a vertical station; firstly, 4-pass horizontal-vertical alternative non-twist rolling is carried out on rolled pieces by using the front 4 rolling mills, and the rear 2 rolling mills pass through the rolling mills in an idle mode; and then, the rolled piece enters a No. 2 temperature control water tank 8 for water cooling temperature control, and enters a second finishing mill group 9 after being cut by a flying shear 4. The temperature of the rolled piece after being water-cooled and temperature-controlled by the No. 2 temperature control water tank 8 is controlled to be about 750 ℃.
5. The rolled piece enters a second finishing mill group 9 containing 3 rolling mills, and the last 1 rolling mill in the second finishing mill group 9 is a horizontal-vertical double-station combined rolling mill which adopts a vertical station; the rolled piece passes through the 1 st rolling mill, is rolled and formed into a single rolled piece by using the following 2 rolling mills, and finally, the temperature of the rolled piece is further controlled by water cooling temperature control to inhibit the growth of crystal grains of internal tissues, thereby forming a final fine-grain bar product.
Example 2
The embodiment is a two-slitting rolling process of a bar, and with reference to fig. 3, fig. 4, and fig. 5, a specific route is as follows:
1. the blank is fed by a feeding rack 1, enters a heating furnace 2, is heated to the tapping temperature (generally 950-1000 ℃) and then enters a core rolling area.
2. The blank is firstly subjected to horizontal-vertical alternate non-twist rolling by a roughing mill group 3 comprising 6-8 rolling mills, and a roughly rolled middle section is rolled.
3. The roughly rolled piece is subjected to head cutting by flying shears 4 and then enters a middle rolling mill unit 5 containing 4-6 rolling mills to be subjected to horizontal-vertical alternative non-twist rolling, the middle section after the middle rolling is rolled out, then is subjected to water cooling temperature control by a No. 1 temperature control water tank 6, and enters a first finishing mill unit 7 after being subjected to head cutting by the flying shears 4. The temperature of the rolled piece after water cooling temperature control is controlled to be about 850 ℃.
4. The rolled piece enters a first finishing mill group 7 containing 6 rolling mills, a 4 th rolling mill in the first finishing mill group 7, namely a horizontal-vertical double-station combined rolling mill adopts a horizontal station, the 6 rolling mills are used, the rolled piece is subjected to horizontal-vertical rolling deformation in the first 1-2 rolling mills, double cutting is carried out in the 3 rd and 4 th rolling mills, and two times of horizontal-horizontal rolling deformation are carried out through the 5 th and 6 th rolling mills, so that the influence of the cutting process on the surface defect of the rolled piece is eliminated; and then, the rolled piece enters a No. 2 temperature control water tank 8 for water cooling temperature control, and enters a second finishing mill group 9 after being cut by a flying shear 4. The temperature of the rolled piece after temperature control is controlled to be about 750 ℃.
5. The rolled piece enters a second finishing mill group 9 containing 3 rolling mills, the last 1 rolling mill in the second finishing mill group 9 is a horizontal-vertical double-station combined rolling mill, a vertical station is adopted, the rolled piece is spaced when passing through the 1 st rolling mill of the second finishing mill group 9, then the subsequent 2 rolling mills are used for horizontal-vertical rolling forming, finally the temperature of the rolled piece is further controlled through water cooling temperature control, the grain growth of the internal structure is inhibited, and a final fine grain bar product is formed.
Example 3
The embodiment is a three-slitting rolling process of a bar, and with reference to fig. 3, fig. 4, and fig. 5, a specific route is as follows:
1. the blank is fed by a feeding rack 1, enters a heating furnace 2, is heated to the tapping temperature (generally 950-1000 ℃) and then enters a core rolling area.
2. The blank is firstly subjected to horizontal-vertical alternate non-twist rolling by a roughing mill group 3 comprising 6-8 rolling mills, and a roughly rolled middle section is rolled.
3. The rolled piece is subjected to head cutting by a flying shear 4 and then enters a middle rolling mill unit 5 comprising 4-6 rolling mills to be subjected to horizontal-vertical alternate non-twist rolling, the middle section after the middle rolling is rolled out, then is subjected to water cooling temperature control by a 1# temperature control water tank 6, and then enters a first finishing mill unit 7 after being subjected to head cutting by the flying shear 4. The temperature of the rolled piece after water cooling temperature control is controlled to be about 880 ℃.
4. The rolled piece enters a first finishing mill group 7 containing 6 rolling mills, a 4 th rolling mill in the first finishing mill group 7, namely a horizontal-vertical double-station combined rolling mill adopts a horizontal station, the 6 th rolling mill is used, the rolled piece is horizontally rolled by a horizontally arranged rolling mill in the front 4 frames of the first finishing mill group 7, and after being pre-cut into three-cut rolled pieces by a 5 th rolling mill, the 6 th rolling mill is idle; and then the steel plate enters a 2# temperature control water tank 8 for water cooling temperature control, and enters a second finishing mill group 9 after being cut by a flying shear 4. In order to improve the process cutting stability and the long service life of the second finishing mill group 9, the temperature of the second finishing mill group 9 is not too low, generally 820-850 ℃.
5. The rolled piece enters a second finishing mill group 9 containing 3 rolling mills, the last 1 rolling mill in the second finishing mill group 9 is a horizontal-vertical double-station combined rolling mill, the 3 rolling mills are all used by adopting a horizontal station, the rolled piece is cut by the 1 st rolling mill, then the 2 nd and 3 th rolling mills carry out multi-cutting forming rolling for the last two times, and finally the temperature of the rolled piece is further controlled by water cooling temperature control to inhibit the crystal grains of the internal structure from growing up, thereby forming a final fine grain bar product.
Example 4
The embodiment is a four-slitting rolling process of a bar, and with reference to fig. 3, fig. 4, and fig. 5, a specific route is as follows:
1. the blank is fed by a feeding rack 1, enters a heating furnace 2, is heated to the tapping temperature (generally 950-1000 ℃) and then enters a core rolling area.
2. The blank is firstly subjected to horizontal-vertical alternate non-twist rolling by a roughing mill group 3 comprising 6-8 rolling mills, and a roughly rolled middle section is rolled.
3. The rolled piece is subjected to head cutting by a flying shear 4 and then enters a middle rolling mill unit 5 comprising 4-6 rolling mills to be subjected to horizontal-vertical alternate non-twist rolling, the middle section after the middle rolling is rolled out, then is subjected to water cooling temperature control by a 1# temperature control water tank 6, and then enters a first finishing mill unit 7 after being subjected to head cutting by the flying shear 4. The temperature of the rolled piece after water cooling temperature control is controlled to be about 880 ℃.
4. The rolled piece enters a first finishing mill group 7 containing 6 rolling mills, a 4 th rolling mill in the first finishing mill group 7, namely a horizontal-vertical double-station combined rolling mill adopts a horizontal station, the 6 th rolling mill is used, the rolled piece is horizontally rolled by a horizontally arranged rolling mill in the front 4 frames of the first finishing mill group 7, and after being pre-cut into four-cut rolled pieces by a 5 th rolling mill, the 6 th rolling mill is idle; and then the steel plate enters a 2# temperature control water tank 8 for water cooling temperature control, and enters a second finishing mill group 9 after being cut by a flying shear 4. In order to improve the process cutting stability and the long service life of the second finishing mill group 9, the temperature of the second finishing mill group 9 is not too low, generally 820-850 ℃.
5. The rolled piece enters a second finishing mill group 9 containing 3 rolling mills, the last 1 rolling mill in the second finishing mill group 9 is a horizontal-vertical double-station combined rolling mill, the 3 rolling mills are all used by adopting a horizontal station, the rolled piece is cut by the 1 st rolling mill, then the 2 nd and 3 th rolling mills carry out multi-cutting forming rolling for the last two times, and finally the temperature of the rolled piece is further controlled by water cooling temperature control to inhibit the crystal grains of the internal structure from growing up, thereby forming a final fine grain bar product.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. It will be apparent to those skilled in the art that modifications and variations can be made to the above-described embodiments without departing from the spirit and scope of the invention, and it is intended that all equivalent modifications and variations be covered by the appended claims without departing from the spirit and scope of the invention.
Claims (8)
1. A high-efficiency bar rolling production line is characterized by comprising a roughing mill group, a flying shear, a middle mill group, a 1# temperature control water tank, a flying shear, a first finishing mill group, a 2# temperature control water tank, a flying shear, a second finishing mill group, a 3# temperature control water tank and a flying shear which are sequentially arranged along a rolling direction, wherein the roughing mill group comprises a plurality of rolling mills which are sequentially and alternately arranged in a horizontal-vertical or vertical-horizontal mode, the middle mill group comprises a plurality of rolling mills which are sequentially and alternately arranged in a horizontal-vertical or vertical-horizontal mode, the first finishing mill group comprises 6 rolling mills which are sequentially arranged in a horizontal-vertical-horizontal/vertical-horizontal mode, the second finishing mill group comprises 3 rolling mills which are sequentially arranged in a horizontal-horizontal/vertical mode, and the 4 th rolling mill of the first finishing mill group and the 3 rd rolling mill of the second finishing mill group are both horizontal-plus-material A vertical double-station combined rolling mill.
2. The efficient bar rolling production line of claim 1, wherein: the roughing mill group comprises 6-8 rolling mills which are alternately arranged in a horizontal-vertical or vertical-horizontal mode.
3. The efficient bar rolling production line of claim 1, wherein: the middle rolling mill set comprises 4-6 rolling mills which are alternately arranged in a horizontal-vertical or vertical-horizontal mode.
4. The efficient bar rolling production line of claim 1, wherein: the production line also comprises a feeding rack, a heating furnace and heated phosphorus removal equipment which are arranged in front of the roughing mill group and are sequentially arranged along the rolling direction.
5. The efficient bar rolling production line of claim 1, wherein: the production line is still including setting up in 3# accuse temperature water tank and flying shear after and along the cold bed, cold shears that rolling direction arranged in order, cross the rack, inspect and bundle collecting device and roll off the production line.
6. The efficient bar rolling production line of claim 1, wherein: the 1# accuse temperature water tank is 1 ~ 2 section formula accuse temperature water tank, 2# accuse temperature water tank is 2 ~ 4 section formula accuse temperature water tank, 3# accuse temperature water tank is 3 ~ 6 section formula accuse temperature water tank.
7. The efficient bar rolling production line of claim 6, wherein: the 1# accuse temperature water tank is two segmentation accuse temperature water tanks, 2# accuse temperature water tank is three-segment accuse temperature water tank, 3# accuse temperature water tank is six segmentation accuse temperature water tanks.
8. The efficient bar rolling production line of claim 1, wherein: the horizontal-vertical double-station combined rolling mill comprises a rolling mill, rolling mill spigots, a gear box, a main motor and a rolling mill support, wherein the number of the rolling mill spigots is two, one of the rolling mill spigots is arranged horizontally, and the other rolling mill spigots is arranged vertically; the rolling mill is provided with a horizontal station and a vertical station, and is connected with a horizontally arranged rolling mill connecting shaft when positioned at the horizontal station, and is connected with a vertically arranged rolling mill connecting shaft when positioned at the vertical station; each rolling mill connecting shaft is correspondingly provided with a gear box and a main motor, and the main motor, the gear box and the rolling mill connecting shaft are sequentially in transmission connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022669424.0U CN213915464U (en) | 2020-11-17 | 2020-11-17 | Efficient bar rolling production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022669424.0U CN213915464U (en) | 2020-11-17 | 2020-11-17 | Efficient bar rolling production line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213915464U true CN213915464U (en) | 2021-08-10 |
Family
ID=77170062
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022669424.0U Active CN213915464U (en) | 2020-11-17 | 2020-11-17 | Efficient bar rolling production line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213915464U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496031A (en) * | 2020-11-17 | 2021-03-16 | 中冶赛迪上海工程技术有限公司 | Efficient bar rolling process and production line |
-
2020
- 2020-11-17 CN CN202022669424.0U patent/CN213915464U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112496031A (en) * | 2020-11-17 | 2021-03-16 | 中冶赛迪上海工程技术有限公司 | Efficient bar rolling process and production line |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112496031B (en) | Efficient bar rolling process and production line | |
| CN210586365U (en) | Wire rod production line | |
| CN1150064C (en) | Method and apparatus for the manufacture of a steel strip | |
| CN105290106A (en) | Low-temperature control rolling and splitting process method and device for ribbed steel bars | |
| CN101518781A (en) | Millarray for producing ultra-fine crystal bar and milling method thereof | |
| CN1128182A (en) | Intermediate thickness twin slab caster and inline hot strip and plate line | |
| CN101391264A (en) | Technique method of thin middle plate continuous casting and rolling production | |
| CN213915464U (en) | Efficient bar rolling production line | |
| CN113403533B (en) | Method for producing HRB500E twisted steel bar by high-speed bar and HRB500E twisted steel bar produced by high-speed bar | |
| CN208542737U (en) | A kind of mild steel continuous casting and rolling production line | |
| CN113751498A (en) | Steel rolling process for double-altitude line | |
| CN102179403B (en) | Production device of high-strength fine-grain hot rolled ribbed steel bars and production process thereof | |
| CN212442552U (en) | High-yield high-precision bar cutting production line | |
| CN110695083A (en) | Production equipment for non-heating high-strength steel | |
| CN100335186C (en) | Method of operating casting-rolling plant | |
| CN103801557A (en) | Process layout and process method for producing fine-grain high-strength steel bar in segmenting and rolling mode | |
| CN102310078B (en) | Continuous-casting continuous-rolling method for producing sectional materials and bar-wire materials by using residual heat of molten steel | |
| CN217141715U (en) | High-speed wire and large-coil composite wire | |
| CN203862668U (en) | Production line for slitting rolling production of fine-grain high-strength steel bars | |
| CN114645193B (en) | HRB600E twisted steel bar produced by high-speed bar | |
| CN210586390U (en) | Steel production system | |
| CN111215446B (en) | High-speed rod production line of double-line | |
| CN207563430U (en) | Bar and wire rod rolling process production line | |
| CN213495643U (en) | Slitting rolling device | |
| CN217726638U (en) | Composite production line for producing H-shaped steel and strip steel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |