CN103433276B - Profile steel rolling production line and production method thereof - Google Patents

Abstract

The invention relates to a profile steel rolling production line and a production method thereof. The profile steel rolling production line comprises a heating unit, a rough rolling unit, a medium rolling unit, a fine rolling unit and a finishing unit, wherein each of the rough rolling unit and the medium rolling unit comprises a rolling mill and a driving device for driving the rolling mill to move along the axial direction of a rolling roller; the rolling rollers of the rolling mills are provided with rolling grooves with different groove holes; the fine rolling unit comprises a two-roller rolling mill or the fine rolling unit comprises a four-roller universal rolling mill, a two-roller edging mill and a four-roller universal rolling mill which are arranged in sequence; the two-roller rolling mill and the two-roller edging mill are provided with driving devices which move along the axial direction of rolling rollers I; the rolling rollers I are further provided with rolling grooves I with different groove holes. After a rolling piece is heated and is sequentially rolled by the upper and lower different rolling grooves through the corresponding rolling rollers on the rough rolling unit, the rolling piece enters the medium rolling unit to be sequentially rolled by the upper and lower different rolling grooves through the corresponding rolling rollers; finally, the rolling piece enters the fine rolling unit to be rolled to form a finished-product sectional material. According to the profile steel rolling production line and the production method thereof, the quantity of the rolling mills is reduced, the weight of a conveying roller bed is reduced, the production line is simplified and the production efficiency is improved.

Description

Section steel rolling production line and production method thereof

technical field

The invention relates to the field of iron and steel metallurgy, in particular to a section steel rolling production line and a production method thereof.

Background technique

Sectional steel is a long strip of steel with a certain cross-sectional shape, including hot rolling, cold bending, welding, extrusion and other production methods. It is also divided into simple section, complex section and periodic section, among which the rolling method occupies an absolute position. Usually, the method of rolling and producing section steel is: sending the billet heated to high temperature into the roll with multiple passes to deform the rolled piece for multiple passes to obtain the finished section product in the hot state, after cooling and finishing The final product is obtained after the process. Since the process of rolling and producing section steel products has many deformation passes, the rolled piece needs to be rolled in multiple passes (roll grooves) of the roll. In order to meet the production needs of each stand rolling mill for section steel production, the strip What comes is the increase in the number of rolling mills and the increase in the length of the conveyor roller table, which will inevitably lead to an increase in construction investment, construction engineering volume, workshop production energy consumption and production costs.

Contents of the invention

In view of this, the object of the present invention is to provide a section steel rolling production line and its production method, which reduces the number of rolling mills and the length of the roll body of the conveying roller table, simplifies the production line, and improves production efficiency.

The invention discloses a section steel rolling production line, which comprises a heating unit, a rough rolling unit, an intermediate rolling unit, a finish rolling unit and a finishing unit arranged in sequence, and the rough rolling unit includes at least one rough rolling mill and the same The number of driving devices I, the driving device I drives the roughing mill to move axially along the rolls of the roughing mill, and the rolls of the roughing mill are sequentially provided with more than two rolling grooves with different slot holes along the axial direction; the intermediate rolling unit includes At least one intermediate rolling mill and the same number of driving devices II as the intermediate rolling mill, the driving device II drives the intermediate rolling mill to move axially along the rolls of the intermediate rolling mill, and the rolls of the intermediate rolling mill are sequentially provided with more than two different slots along the axial direction A rolling groove; the finish rolling unit includes at least one finish rolling mill.

Further, the rough rolling unit, the intermediate rolling unit and the finishing rolling unit are all equipped with rolling mill auxiliary turning steel devices.

Further, a steel moving device is provided between the rough rolling unit and the intermediate rolling unit and between the intermediate rolling unit and the finish rolling unit.

Further, the finishing mill is a two-roll mill, and the two-roll mill is provided with a drive device III that drives the two-roll mill to move axially along the two-roll mill rolls, and the two-roll mill rolls are sequentially provided with two The rolling grooves of the above different grooves.

Further, the finishing mill includes a four-roll universal mill, a two-roll edger and a four-roll universal mill arranged in sequence, and the two-roll edger is provided with a drive to move the two-roller along the axial direction of the two-roller rolls. The moving drive device IV, the rolls of the two-roller edger are provided with more than two rolling grooves with different grooves in sequence along the axial direction.

The present invention also discloses a method for producing section steel using the above-mentioned section steel rolling production line, comprising the following steps:

(1) The rolled piece is heated to the rolling temperature in the heating unit;

(2) The rolled piece enters the roughing unit. After rolling a slot hole in the roughing mill, the driving device Ⅰ drives the roughing mill to move along the axial direction of the roughing mill roll, so that the next slot on the roll after the roughing mill moves is aligned with the rolling mill. Rolling is carried out after the workpiece is aligned, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes;

(3) The rolled piece enters the intermediate rolling unit. After rolling a slot hole in the intermediate rolling mill, the driving device II drives the intermediate rolling mill to move along the axial direction of the intermediate rolling mill roll, so that the next slot on the roll after the intermediate rolling mill moves is in line with the rolling mill. Rolling is carried out after the workpiece is aligned, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes;

(4) The rolled piece enters the finish rolling unit. After rolling a slot hole in the two-roll mill, the driving device III drives the two-roll mill to move along the roll axis, so that the next slot on the roll after the two-roll mill moves and The rolled piece is aligned and then rolled. In the interval between rolling passes, the rolled piece is turned over by the rolling mill auxiliary turning device; or the rolled piece enters the finishing unit, and is processed by a four-roll universal rolling mill and a two-roll edger. Rolling, when the two-roll edging machine completes the rolling of a slot, the driving device IV drives the two-roll edging machine to move along the axial direction of the two-roll edging machine roll, so that the next roll on the two-roll edging machine moves Align the slot hole with the rolled piece, and then roll through the four-roll universal rolling mill and the two-roll edger. In the interval between rolling passes, the rolled piece is turned over by the rolling mill's auxiliary turning device;

(5) The rolled piece enters the finishing unit for finishing treatment, and finally the finished section steel is obtained.

The beneficial effects of the present invention are: the present invention includes the following advantages:

1) Reduce the number of rolling mills in the rolling production line, shorten the length of the conveying roller table, reduce the investment in engineering construction, the amount of engineering construction, reduce the energy consumption of the conveying roller table, improve the flexibility of the roller table rotation, and reduce the The energy consumption and operating costs of the entire production have improved production efficiency and production profits, and enhanced the competitiveness of enterprises;

2) The production operation is simple, the failure rate of equipment is reduced, and the workload of maintenance and repair is reduced;

3) The rolled piece does not need to move the steel to the pass as frequently as in the traditional section steel rolling. The rolled piece only remains in place or is only turned over according to the process needs, eliminating the scratches caused by the lateral movement of the rolled piece, significantly Improve the surface quality of rolled pieces;

Description of drawings

In order to make the purpose of the invention, technical solutions and advantages clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings, wherein:

Fig. 1 is the process equipment layout drawing of embodiment 1 of the present invention;

Fig. 2 is the process equipment layout diagram of embodiment 2 of the present invention;

Fig. 3 is a layout diagram of process equipment in Embodiment 3 of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example 1

Fig. 1 is the technological equipment arrangement diagram of embodiment 1 of the present invention, as shown in Fig. 1, the section steel rolling production line of the present invention, comprises heating unit 1, rough rolling unit, middle rolling unit, finish rolling unit and finishing unit arranged in sequence Unit 13, the rough rolling unit includes a rough rolling mill 2 and the same number of driving devices I3 as the rough rolling mill 2, the driving device I3 drives the rough rolling mill 2 to move axially along the rough rolling mill roll, the roll of the rough rolling mill 2 There are more than two rolling grooves with different slot holes in sequence along the axial direction; the intermediate rolling unit includes one intermediate rolling mill 4 and the same number of driving devices II5 as the intermediate rolling mill 4, and the driving device II5 drives the intermediate rolling mill 4 along the intermediate rolling mill. The rolls move axially, and the rolls of the intermediate rolling mill 4 are sequentially provided with more than two rolling grooves with different slot holes along the axial direction; the finishing rolling unit includes a finishing rolling mill. Set the number of rolling mills in each rolling unit and the slots of the rolling grooves on the rolls of each rolling mill. The driving device includes comprehensive control and adjustment of mechanical, electrical and hydraulic aspects to realize the movement of the rolling mill along the axial direction of the rolls, so that the different slots on the rolls of the rolling mill The rolling grooves are aligned with the rolling pieces for rolling respectively. According to the requirements of the section steel rolling process, a sawing device 8 for cutting the head and tail of the section steel can also be installed between each rolling mill unit to saw and cut off the irregular head and tail of the rolling mill after rolling in the previous process, so that it is more convenient to enter the next process. The process is rolled to avoid production failure.

In this embodiment, the rough rolling unit, the intermediate rolling unit and the finishing rolling unit are all equipped with a rolling mill auxiliary turning steel device 7. Turn over the rolled piece in the secondary gap.

In this embodiment, a steel moving device 9 is provided between the rough rolling unit and the intermediate rolling unit and between the intermediate rolling unit and the finishing rolling unit. Rolling, improve rolling efficiency.

In this embodiment, the finishing mill is a two-roll mill 10, and the two-roll mill 10 is provided with a driving device III6 that drives the two-roll mill 10 to move axially along the two-roll mill rolls, and the two-roll mill 10 rolls along the There are more than two rolling grooves with different groove holes in sequence in the axial direction. The rolling mill moves along the axial direction of the roll, so that the rolling grooves of different grooves on the rolling mill roll are aligned with the rolling piece and rolled separately, and finally the finished product in the hot state is rolled.

Example 2

Fig. 2 is the technological equipment arrangement diagram of embodiment 2 of the present invention, as shown in Fig. 2, the section steel rolling production line of the present invention, comprises heating unit 1, rough rolling unit, middle rolling unit, finish rolling unit and finishing unit arranged in sequence Unit 13, the rough rolling unit includes a rough rolling mill 2 and the same number of driving devices I3 as the rough rolling mill 2, the driving device I3 drives the rough rolling mill 2 to move axially along the rough rolling mill roll, the roll of the rough rolling mill 2 There are more than two rolling grooves with different slot holes in sequence along the axial direction; the intermediate rolling unit includes two intermediate rolling mills 4 and the same number of driving devices II5 as the intermediate rolling mills 4, and the driving device II5 drives the intermediate rolling mills 4 along the intermediate rolling mill The rolls move axially, and the rolls of the intermediate rolling mill 4 are sequentially provided with more than two rolling grooves with different slot holes along the axial direction; the finishing rolling unit includes two finishing rolling mills. Set the number of rolling mills in each rolling unit and the slots of the rolling grooves on the rolls of each rolling mill. The driving device includes comprehensive control and adjustment of mechanical, electrical and hydraulic aspects to realize the movement of the rolling mill along the axial direction of the rolls, so that the different slots on the rolls of the rolling mill The rolling grooves are aligned with the rolling pieces for rolling respectively. According to the requirements of the section steel rolling process, a sawing device 8 for cutting the head and tail of the section steel can also be installed between each rolling mill unit to saw and cut off the irregular head and tail of the rolling mill after rolling in the previous process, so that it is more convenient to enter the next process. The process is rolled to avoid production failure.

In this embodiment, the rough rolling unit, the intermediate rolling unit and the finishing rolling unit are all equipped with a rolling mill auxiliary turning steel device 7. Turn over the rolled piece in the secondary gap.

In this embodiment, a steel moving device 9 is provided between the rough rolling unit and the intermediate rolling unit and between the intermediate rolling unit and the finishing rolling unit. After being rolled and deformed by the rolling mill 4 in the first stand, it enters the rolling mill 4 in the second stand for rolling, and the steel moving device 9 effectively shortens the length of the rolling line, so that each rolling mill unit can be rolled simultaneously to improve rolling efficiency.

In this embodiment, the finishing mill is a two-roll mill 10, and the two-roll mill 10 is provided with a driving device III6 that drives the two-roll mill 10 to move axially along the two-roll mill rolls, and the two-roll mill 10 rolls along the There are more than two rolling grooves with different groove holes in sequence in the axial direction. The rolling mill moves along the axial direction of the roll, so that the rolling grooves of different grooves on the rolling mill roll are aligned with the rolling piece and rolled separately, and finally the finished product in the hot state is rolled.

Example 3

Fig. 3 is the technological equipment arrangement diagram of embodiment 3 of the present invention, as shown in Fig. 3, section steel rolling production line of the present invention, comprises heating unit 1, rough rolling unit, middle rolling unit, finish rolling unit and finishing unit arranged in sequence Unit 13, the rough rolling unit includes a rough rolling mill 2 and the same number of driving devices I3 as the rough rolling mill 2, the driving device I3 drives the rough rolling mill 2 to move axially along the rough rolling mill roll, the roll of the rough rolling mill 2 There are more than two rolling grooves with different slot holes in sequence along the axial direction; the intermediate rolling unit includes one intermediate rolling mill 4 and the same number of driving devices II5 as the intermediate rolling mill 4, and the driving device II5 drives the intermediate rolling mill 4 along the intermediate rolling mill. The rolls move axially, and the rolls of the intermediate rolling mill 4 are sequentially provided with rolling grooves with more than two different slot holes along the axial direction; the finishing rolling unit includes 3 finishing rolling mills and the same number of driving devices III6 as the finishing rolling mills, so The driving device III6 drives the finishing mill to move axially along the rolls of the finishing mill, and the rolls of the finishing mill are sequentially provided with more than two rolling grooves with different slot holes along the axial direction. Set the number of rolling mills in each rolling unit and the slots of the rolling grooves on the rolls of each rolling mill. The driving device includes comprehensive control and adjustment of mechanical, electrical and hydraulic aspects to realize the movement of the rolling mill along the axial direction of the rolls, so that the different slots on the rolls of the rolling mill The rolling grooves are aligned with the rolling pieces for rolling respectively. According to the requirements of the section steel rolling process, a sawing device 8 for cutting the head and tail of the section steel can also be installed between each rolling mill unit to saw and cut off the irregular head and tail of the rolling mill after rolling in the previous process, so that it is more convenient to enter the next process. The process is rolled to avoid production failure.

In this embodiment, the rough rolling unit, the intermediate rolling unit and the finishing rolling unit are all equipped with a rolling mill auxiliary turning steel device 7. Turn over the rolled piece in the secondary gap.

In this embodiment, a steel moving device 9 is provided between the rough rolling unit and the intermediate rolling unit and between the intermediate rolling unit and the finishing rolling unit. Rolling, improve rolling efficiency.

In this embodiment, the finishing mill includes a four-roll universal mill 11, a two-roll edger 12, and a four-roll universal mill 11 arranged in sequence. The four-roll universal mill is fixed, and four rolls form a specific pass. Adjust the stroke of the rolls to form passes with different cross-sectional sizes; the two-roll edging machine 12 is provided with a driving device IV14 that drives the two-roll edging machine 12 to move axially along the two-roll edging machine rolls, and the two-roll edging machine The roll of machine 12 is provided with rolling grooves with more than two different groove holes successively along the axial direction. The rolled piece is rolled through the passes of different sections of the four-roller universal rolling mill and the rolling grooves of different slot holes of the two-roller edger, and finally the finished product in a hot state is rolled.

The method for producing section steel using the section steel rolling production line of the present invention may further comprise the steps:

(1) The rolled piece is heated to the rolling temperature in the heating unit 1;

(2) The rolled piece enters the rough rolling unit. After rolling a slot in the rough rolling mill 2, the driving device Ⅰ3 drives the rough rolling mill 2 to move along the axial direction of the rough rolling mill roll, so that the next slot on the roll after the rough rolling mill 2 moves The hole is aligned with the rolled piece and then rolled. In the interval between rolling passes, the rolled piece is turned over by the auxiliary turning device 7 of the rolling mill. The rolled piece can be rolled once in a certain rolling groove and replaced. The groove can also be rolled back and forth for several passes before replacing the rolling groove;

(3) The rolled piece enters the intermediate rolling unit. After rolling a slot hole in the intermediate rolling mill 4, the driving device Ⅱ5 drives the intermediate rolling mill 4 to move along the axial direction of the intermediate rolling mill roll, so that the next slot on the roll after the intermediate rolling mill 4 moves The hole is aligned with the rolled piece and then rolled. In the interval between rolling passes, the rolled piece is turned over by the auxiliary turning device 7 of the rolling mill. The rolled piece can be rolled once in a certain rolling groove and replaced. The groove can also be rolled back and forth for several passes before replacing the rolling groove;

(4) The rolled piece enters the finish rolling unit. After rolling a slot in the two-roll mill 10, the driving device III6 drives the two-roll mill 10 to move along the axial direction of the roll, so that the next roller on the two-roll mill 10 moves The grooves are aligned with the rolled piece and then rolled. In the interval between rolling passes, the rolled piece is turned over by the rolling mill auxiliary turning device 7; The roll edger 12 performs rolling. After the two-roll edger 12 finishes rolling a slot hole, the four-roll universal mill obtains passes with different cross-sectional sizes by adjusting the roll stroke, and the driving device IV14 drives the two-roll edger. 12 Move along the axial direction of the rolls of the two-roll edging machine, so that the next groove on the roll after the two-roll edging machine 12 moves is aligned with the rolling piece, and then rolled through the four-roll universal rolling mill and the two-roll edging machine. In the gap between rolling passes, the rolled piece is turned over by the rolling mill auxiliary turning device;

(5) The rolled piece enters the finishing unit 13 for finishing treatment, and finally the finished section steel is obtained.

Finally, it is noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art should understand that it can be described in the form Various changes may be made in matter and details thereof without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (7)

1. A section steel rolling production line, comprising a heating unit, a rough rolling unit, a middle rolling unit, a finish rolling unit and a finishing unit arranged in sequence, it is characterized in that: the rough rolling unit includes at least one rough rolling mill and rough rolling unit The same number of driving devices I in the rolling mill, the driving device I drives the roughing mill to move axially along the rolls of the roughing mill, and the rolls of the roughing mill are provided with rolling grooves with more than two different slot holes in sequence along the axial direction; the intermediate rolling mill The unit includes at least one intermediate rolling mill and the same number of driving devices II as the intermediate rolling mill. The driving device II drives the intermediate rolling mill to move axially along the rolls of the intermediate rolling mill. The rolls of the intermediate rolling mill are sequentially provided with more than two different grooves along the axial direction. The rolling groove of the hole; the finish rolling unit includes at least one finish rolling mill. 2. The section steel rolling production line according to claim 1, characterized in that: the rough rolling unit, the intermediate rolling unit and the finishing rolling unit are all equipped with rolling mill auxiliary turning steel devices. 3. The section steel rolling production line according to claim 1, characterized in that: a steel moving device is provided between the rough rolling unit and the intermediate rolling unit and between the intermediate rolling unit and the finish rolling unit. 4. The section steel rolling production line according to any one of claims 1 to 3, characterized in that: the finishing mill is a two-roll mill, and the two-roll mill is provided with a drive to drive the two-roll mill along the axial direction of the rolls of the two-roll mill. The moving drive device III, the rolls of the two-high rolling mill are sequentially provided with more than two rolling grooves with different groove holes along the axial direction. 5. The section steel rolling production line according to any one of claims 1 to 3, characterized in that: the finishing mill comprises a four-roll universal mill, a two-roll edger and a four-roll universal mill arranged in sequence, and the two The roller edging machine is equipped with a driving device IV that drives the two-roll edging machine to move along the axial direction of the two-roll edging machine rolls. groove. 6. use the method for the section steel rolling production line production section steel described in claim 4, it is characterized in that: comprise the following steps: (1) The rolled piece is heated to the rolling temperature in the heating unit; (2) The rolled piece enters the rough rolling unit. After rolling a slot hole in the rough rolling mill, the driving device Ⅰ drives the rough rolling mill to move along the axial direction of the rough rolling mill roll, so that after the rough rolling mill moves, the next slot hole on the roll and The rolled piece is aligned and then rolled, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes; (3) The rolled piece enters the intermediate rolling unit. After rolling a slot hole in the intermediate rolling mill, the driving device II drives the intermediate rolling mill to move along the axial direction of the intermediate rolling mill roll, so that after the intermediate rolling mill moves, the next slot on the roll is aligned with the rolling mill. The rolled piece is aligned and then rolled, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes; (4) The rolled piece enters the finish rolling unit. After rolling a slot in the two-roll mill, the driving device III drives the two-roll mill to move along the roll axis, so that after the two-roll mill moves, the next slot on the roll Align with the rolled piece and then roll, and in the interval between rolling passes, the rolled piece is turned over by the rolling mill auxiliary turning device; (5) The rolled piece enters the finishing unit for finishing treatment, and finally the finished section steel is obtained. 7. use the method for producing section steel of section steel rolling production line described in claim 5, it is characterized in that: comprise the following steps: (1) The rolled piece is heated to the rolling temperature in the heating unit; (2) The rolled piece enters the rough rolling unit. After rolling a slot hole in the rough rolling mill, the driving device Ⅰ drives the rough rolling mill to move along the axial direction of the rough rolling mill roll, so that after the rough rolling mill moves, the next slot hole on the roll and The rolled piece is aligned and then rolled, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes; (3) The rolled piece enters the intermediate rolling unit. After rolling a slot hole in the intermediate rolling mill, the driving device II drives the intermediate rolling mill to move along the axial direction of the intermediate rolling mill roll, so that after the intermediate rolling mill moves, the next slot on the roll is aligned with the rolling mill. The rolled piece is aligned and then rolled, and the rolled piece is turned over by the rolling mill auxiliary turning device in the interval between rolling passes; (4) The rolled piece enters the finish rolling unit, and is rolled by the four-roll universal rolling mill and the two-roll edger. The rollers of the roller edger move axially, so that after the two-roller moves, the next slot on the roller is aligned with the rolling piece, and then rolled through the four-roller universal mill and the two-roller edger. In the secondary gap, the rolled piece is turned over by the rolling mill auxiliary turning device; (5) The rolled piece enters the finishing unit for finishing treatment, and finally the finished section steel is obtained.