WO2024138938A1

WO2024138938A1 - Apparatus for continuous finishing production of high-strength steel, and finishing production method thereof

Info

Publication number: WO2024138938A1
Application number: PCT/CN2023/086490
Authority: WO
Inventors: 杨柳
Original assignee: 中冶南方工程技术有限公司
Priority date: 2022-12-26
Filing date: 2023-04-06
Publication date: 2024-07-04
Also published as: CN116100326A

Abstract

An apparatus for continuous finishing production of high-strength steel. The apparatus comprises an uncoiling machine (1), a deep bending roller (2), a primary straightening machine (3), a welding machine (4), a temper mill (7), a multi-roller straightening machine (8), a flying shear (9) and a coiling machine (10) which sequentially cooperate with each other, wherein tension roller groups (6) are further arranged between the welding machine and the temper mill, between the temper mill and the multi-roller straightening machine, and between the multi-roller straightening machine and the flying shear, and loopers (5) are arranged behind the tension roller groups. The uncoiling machine cooperates with the deep bending roller to loosen a raw steel coil into strip steel and feed and convey the raw steel coil; the primary straightening machine straightens the raw steel coil throughout the whole process; the welding machine welds the head and the tail of adjacent strip steel; the temper mill flattens the strip steel to improve the plate shape and surface quality; the multi-roller straightening machine eliminates the residual stress of the strip steel and further improves the plate shape thereof; the tension roller groups dynamically adjust the tension of the strip steel; and the flying shear and the coiling machine shear the strip steel and coil the strip steel to obtain a finished steel coil. By means of the apparatus for continuous finishing production of high-strength steel, stable and continuous finishing production of high-strength steel can be achieved with high levels of production efficiency, a large yield and high quality.

Description

A high-strength steel continuous finishing production equipment and finishing production method

Technical Field

The invention relates to the technical field of cold and hot strip steel finishing, and in particular to a high-strength steel continuous finishing production device and a finishing production method thereof.

Background technique

With the rapid development of the national economy, the demand for high-strength steel is increasing, and the output is also increasing. At present, the continuous finishing of high-strength steel is carried out through traditional single-frame finishing production equipment. This method has the disadvantages of slow production rhythm, low output, low success rate, poor plate shape and unstable product quality.

Summary of the invention

The present invention aims to provide a high-strength steel continuous finishing production equipment and a finishing production method thereof to solve at least one of the above-mentioned problems.

To achieve the above-mentioned purpose, the technical scheme of the present invention is: a high-strength steel continuous finishing production equipment, including an uncoiler, a deep bending roller, a primary leveler, a welding machine, a leveler, a multi-roller straightening machine, a flying shear, and a coiler arranged in sequence. At least one tension roller group is arranged in front of the leveler and the multi-roller straightening machine, and a looper is arranged behind the tension roller group. The uncoiler and the deep bending roller cooperate with each other to unwind the raw steel coil into a strip and feed it. The primary leveler is used to straighten the raw material coil throughout the process. The welding machine is used to weld the head and tail of adjacent strips. The leveler is used to level the strip to improve the plate shape and surface quality. The multi-roller straightener is used to eliminate the residual stress of the strip and improve the plate shape. The tension roller group is used to dynamically adjust the tension of the strip. The flying shear is used to shear the strip. The coiler is used to coil the strip into a finished steel coil.

In one embodiment, two tension roller groups are arranged between the welding machine and the leveling machine, there are two multi-roller straightening machines, and the two multi-roller straightening machines are arranged in sequence between the leveling machine and the flying shear. There are two groups of loops, one group of loops is located between the two tension roller groups, and the other group of loops is located between the rear tension roller group and the multi-roller straightening machine.

In one embodiment, the primary leveler includes a first upper roller box and a first lower roller box disposed one above the other, and a first pressing device located above the first upper roller box.

In one embodiment, the number of rollers of the primary leveler ranges from 3 to 9 rollers, and the roller diameter ranges from 120 to 220 mm.

In one embodiment, the leveling machine is a four-roller leveling machine, which includes an upper support roll and a lower support roll arranged one above the other, a second pressing device located above the upper support roll, an upper working roll and a lower working roll located between the upper support roll and the lower support roll, and a bending roll cylinder located on both sides of the upper working roll and the lower working roll.

In one embodiment, the deep bending roll is a double structure, which includes two rows of support rolls and a working roll located below the two rows of support rolls.

In one embodiment, the roll diameter of the working roll of the deep bending roll ranges from 100 to 160 mm.

In one embodiment, the multi-roller straightening machine is a quadruple straightening machine, which includes a frame and upper and lower distributed The second upper roller box and the second lower roller box are respectively arranged on the cross beam, the lower cross beam, the upper cross beam and the lower cross beam, and a third pressing device is arranged above the second upper roller box.

In one embodiment, the number of rollers of the multi-roller straightening machine ranges from 7 to 21, and the roller diameter ranges from 30 mm to 120 mm.

The high-strength steel continuous finishing production device, its finishing production method includes: the raw steel coil is first unrolled into a strip steel for feeding and output through a uncoiler, then a deep bending roller follows the strip steel to press down, a primary leveler straightens the strip steel throughout the entire process, a welding machine welds the head and tail of adjacent strip steels, and the welded strip steel then passes through a tension roller group to a leveling machine, the leveling machine levels the strip steel to improve the plate shape and surface quality, and then passes through a multi-roller straightening machine to eliminate residual stress and further improve the plate shape, and then the strip steel is sheared by a flying shear, and finally the coiler coils the strip steel into a finished steel coil.

The present invention has the following beneficial effects:

The present invention comprises an uncoiler, a deep bending roller, a primary straightener, a welding machine, a leveler, a multi-roller straightener, a flying shear and a coiler which are arranged in sequence in front and behind. At least one tension roller group is arranged in front of the leveler and the multi-roller straightener, and a looper is arranged behind the tension roller group. The uncoiler and the deep bending roller cooperate with each other to unwind the raw steel coil into a strip steel and feed and convey it. The primary straightener is used to straighten the raw steel coil throughout the whole process. The welding machine is used to weld the head and tail of adjacent strip steels. The leveler is used to level the strip steel to improve the plate shape and surface quality. The multi-roller straightener is used to In order to eliminate the residual stress of the strip and improve the plate shape, the tension roller group is used to dynamically adjust the tension of the strip, the flying shear is used to shear the strip, and the coiler is used to coil the strip into a finished steel coil. The present invention can realize the full continuous production of the strip, and has high production efficiency, large output, low cost, strong applicability, and the finished steel coils produced have excellent and stable quality and high consistency. The product yield rate is higher than 99%, which ensures that high-strength steel can be stably and continuously finished, thereby producing high-strength steel with high quality and low residual stress better, faster, more and more stably.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is an overall schematic diagram of an embodiment of the present invention;

FIG2 is a schematic structural diagram of an uncoiler and a deep bending roll according to an embodiment of the present invention;

3 is a schematic structural diagram of a primary straightening machine according to an embodiment of the present invention;

FIG4 is a schematic structural diagram of a leveling machine according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a multi-roll straightening machine according to an embodiment of the present invention.
The accompanying drawings are marked: 1 uncoiler, 2 deep bending roll, 21 support roll, 22 working roll, 3 primary leveler, 31 first upper roll box, 32 first lower roll box, 33 first press device, 4 welding machine, 5 looper, 6 tension roll group, 7 leveling machine, 71 upper support roll, 72 lower support roll, 73 second press device, 74 upper working roll, 75 lower working roll, 76 bending roll cylinder, 8 multi-roll straightening machine, 81 frame, 82 upper crossbeam, 83 lower crossbeam, 84 second upper roll box, 85 second lower roll box, 86 third press device, 9 flying shear, 10 coiler.

Detailed ways

To further illustrate various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention. The present invention is mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

Referring to Figures 1-5, as an embodiment of the present invention, a high-strength steel continuous finishing production equipment is provided, including an uncoiler 1, a deep bending roller 2, a primary leveler 3, a welding machine 4, a leveler 7, a multi-roller straightener 8, a flying shear 9, and a coiler 10, which are arranged in sequence. At least one tension roller group 6 is arranged in front of the leveler 7 and the multi-roller straightener 8, and a looper 5 is arranged behind the tension roller group 6. The uncoiler 1 and the deep bending roller 2 cooperate with each other to unwind the raw steel coil into a strip steel and feed it. The primary leveler 3 is used to straighten the raw steel coil throughout the process. The welding machine 4 is used to weld the head and tail of adjacent strip steels. The leveler 7 is used to level the strip steel to improve the plate shape and surface quality. The multi-roller straightener 8 is used to eliminate the residual stress of the strip steel and further improve the plate shape. The tension roller group 6 is used to dynamically adjust the tension of the strip steel. The flying shear 9 is used to shear the strip steel. The coiler 10 is used to coil the strip steel into a finished steel coil.

The high-strength steel continuous finishing production equipment of the present invention is used for continuous finishing production of high-strength steel, wherein high-strength steel refers to strip steel whose strength can reach 1200MPa after quenching and tempering. The equipment continuously finishes the steel strip through the orderly coordination of an unwinder 1, a deep bending roller 2, a primary leveler 3, a welding machine 4, a tension roller group 6, a leveler 7, a multi-roller straightener 8, a flying shear 9, and a coiler 10, and at least one tension roller group 6 is arranged in front of the leveler 7 and the multi-roller straightener 8. The tension roller group 6 can dynamically adjust the tension of the strip steel at different stages at the corresponding position, thereby optimizing the production. The process improves the product quality; the specific production process is: the raw steel coil is firstly unrolled into a strip steel for feeding and output through the unwinding machine 1, and then the deep bending roller 2 follows the strip steel to press down, the primary straightening machine 3 straightens the strip steel throughout the process, the welding machine 4 welds the head and tail of the adjacent strip steel, and the strip steel after welding is then passed through the looper 5 and the tension roller group 6 to the leveling machine 7, the leveling machine 7 levels the strip steel to improve the plate shape and surface quality, and then passes through the multi-roller straightening machine 8 to eliminate the residual stress and improve the plate shape, and then the strip steel is sheared by the flying shear 9, and finally the coiler 10 coils the strip steel into a finished steel coil. In summary, the present invention can realize the full continuous production of strip steel, and has high production efficiency, large output, and can produce more than 1 million tons, low cost, strong applicability, and the finished steel coils produced are of excellent and stable quality, high consistency, and the product yield rate is higher than 99%, which ensures that the high-strength steel can be stably and continuously finished, so as to produce high-quality, low residual stress high-strength steel better, faster, more and more stable.

Specifically, two tension roller groups 6 are arranged between the welding machine 4 and the leveler 7, there are two multi-roller straighteners 8, and the two multi-roller straighteners 8 are arranged in sequence between the leveler 7 and the flying shear 9, and there are two groups of loopers 5, one of which is located between the two tension roller groups 6, and the other is located between the rear tension roller group 6 and the multi-roller straightener 8. This arrangement enables the welded strip to be adjusted to the optimal tension and then transported to the leveler 7 for leveling and improvement. The looper 5 is used for strip storage and buffering, so that the operation of the devices in front and behind it will not affect each other, and the two multi-roller straighteners 8 can further improve the straightening quality of the strip.

Referring to FIG. 3 , in this embodiment, the primary straightening machine 3 includes a first upper roller box 31 and a first lower roller box 32 arranged vertically. And a first pressing device 33 is located above the first upper roll box 31. The steel strip is located between the first upper roll box 31 and the first lower roll box 32. The first pressing device 33 drives the first upper roll box 31 to press downward. The first pressing device 33 drives the first upper roll box 31 to press downward and cooperates with the first lower roll box 32 to straighten the steel strip. There are two first pressing devices 33, which are respectively arranged on both sides above the first upper roll box 31 to ensure the balance and stability of the pressing process, thereby ensuring the straightening effect of the steel strip.

Among them, the number of rollers of the primary straightening machine 3 ranges from 3 to 9 rollers, and the roller diameter ranges from 120 to 220 mm. This range of values can be adapted to straightening strip steels of most specifications and can meet the requirements of higher work intensity.

4 , in the present embodiment, the leveling machine 7 is a four-roller leveling machine 7, which includes an upper support roll 71 and a lower support roll 72 arranged in an upper and lower position, a second pressing device 73 located above the upper support roll 71, an upper working roll 74 and a lower working roll 75 located between the upper support roll 71 and the lower support roll 72, and a bending roll cylinder 76 located on both sides of the upper working roll 74 and the lower working roll 75. The upper support roll 71 and the lower support roll 72 are respectively used to adjust the inclination of the upper working roll 74 and the lower working roll 75, and the upper working roll 74 and the lower working roll 75 are used for positive and negative bending roll adjustment, automatic constant rolling force and constant elongation control. The strip is located between the upper working roll 74 and the lower working roll 75, and the upper support roll 71 is driven downward by the second pressing device 73, thereby driving the upper working roll 74 to press down and cooperate with the lower working roll 75 to level the strip, so as to further improve the strip shape, eliminate the yield platform, and improve the processing performance.

As shown in Figure 2, in this embodiment, the deep bending roller 2 is a double structure, which includes two rows of support rollers 21 and a working roller 22 located below the two rows of support rollers 21. This arrangement enables it to stably remove the iron oxide scale on the surface of the strip, avoid horizontal folds when the strip is uncoiled, eliminate the residual stress of the strip, and absorb the loose coil inside the steel coil to avoid causing tension fluctuations, thereby stabilizing the tension of the uncoiler 1.

In this embodiment, the roller diameter range of the working roller 22 of the deep bending roller 2 is 100-160 mm. This range of values can be adapted to straightening strip steels of most specifications and can meet the requirements of higher working intensity.

As shown in Figure 5, the multi-roll straightening machine 8 is a quadruple straightening machine, which includes a frame 81 and an upper beam 82 and a lower beam 83 which are distributed in the upper and lower parts of the frame 81. The upper beam 82 and the lower beam 83 are respectively provided with a second upper roller box 84 and a second lower roller box 85. Third pressing devices 86 are respectively provided on both sides above the second upper roller box 84. The strip is located between the second upper roller box 84 and the second lower roller box 85. The second upper roller box 84 is pressed down by the third pressing device 86 to cooperate with the second lower roller box 85 to straighten the strip. The straightening process is stable and the quality is good.

In this embodiment, the number of rollers of the multi-roller straightening machine ranges from 7 to 21, and the roller diameter ranges from 30 mm to 120 mm. This range of values can be adapted to straightening strip steels of most specifications and can meet the requirements of higher work intensity.

In this embodiment, the first pressing device 33, the second pressing device 73, and the third pressing device 83 are all hydraulic pressing devices, and the hydraulic driving method is relatively stable.

The present invention also provides a high-strength steel continuous finishing production method according to another embodiment, comprising the high-strength steel continuous finishing production equipment according to the above embodiment, wherein the raw steel coil is firstly unrolled into a strip steel for feeding and output by an unwinding machine 1, and then a deep bending roller 2 is used to perform the deep bending of the raw steel coil. Following the strip steel pressing down, the primary leveler 3 straightens the strip steel throughout the whole process, the welding machine 4 welds the head and tail of the adjacent strip steel, and the welded strip steel passes through the looper 5 and the tension roller group 6 to the leveling machine 7, and the leveling machine 7 levels the strip steel to improve the plate shape and surface quality, and then passes through the multi-roller straightening machine 8 to eliminate residual stress and improve the plate shape, and then the strip steel is sheared by the flying shear 9, and finally the coiler 10 coils the strip steel into finished steel coils. This production method can realize the full continuous production of strip steel, and has high production efficiency, large output, low cost, strong applicability, and the finished steel coils produced are of excellent and stable quality and high consistency.

Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims will fall within the scope of protection of the present invention.

Claims

A high-strength steel continuous finishing production equipment, characterized in that it includes an uncoiler, a deep bending roller, a primary leveler, a welding machine, a leveler, a multi-roller straightening machine, a flying shear, and a coiler which are arranged in sequence. At least one tension roller group is arranged in front of the leveler and the multi-roller straightening machine, and a looper is arranged behind the tension roller group. The uncoiler and the deep bending roller cooperate with each other to unwind the raw steel coil into a strip steel and feed it. The primary leveler is used to straighten the raw steel coil throughout the whole process. The welding machine is used to weld the head and tail of adjacent strip steels. The leveler is used to level the strip steel to improve the plate shape and surface quality. The multi-roller straightening machine is used to eliminate the residual stress of the strip steel and further improve the plate shape. The tension roller group is used to dynamically adjust the tension of the strip steel. The flying shear is used to shear the strip steel. The coiler is used to coil the strip steel into a finished steel coil.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that: two tension roller groups are arranged between the welding machine and the leveling machine, there are two multi-roller straightening machines, and the two multi-roller straightening machines are arranged in sequence between the leveling machine and the flying shear, there are two groups of loops, one group of loops is located between the two tension roller groups, and the other group of loops is located between the rear tension roller group and the multi-roller straightening machine.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that the primary straightening machine includes a first upper roller box and a first lower roller box arranged up and down, and a first pressing device located above the first upper roller box.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that the number of rollers of the primary leveler ranges from 3 to 9 rollers, and the roller diameter ranges from 120 to 220 mm.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that the leveling machine is a four-roller leveling machine, which includes an upper support roll and a lower support roll arranged up and down, a second pressing device located above the upper support roll, an upper working roll and a lower working roll located between the upper support roll and the lower support roll, and a bending roll cylinder located on both sides of the upper working roll and the lower working roll.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that the deep bending roll is a double structure, which includes two rows of support rolls and a working roll located below the two rows of support rolls.
The high-strength steel continuous finishing production equipment according to claim 6 is characterized in that the roller diameter range of the working roller of the deep bending roller is 100 to 160 mm.
The high-strength steel continuous finishing production equipment according to claim 1 is characterized in that the multi-roll straightening machine is a quadruple straightening machine, which includes a frame and an upper beam and a lower beam distributed up and down on the frame, and a second upper roller box and a second lower roller box are respectively arranged on the upper beam and the lower beam, and a third pressing device is arranged above the second upper roller box.
The high-strength steel continuous finishing production equipment according to claim 8 is characterized in that the number of rollers of the multi-roller straightening machine ranges from 7 to 21 rollers, and the roller diameter ranges from 30 mm to 120 mm.
The high-strength steel continuous finishing production equipment described in claim 1, its finishing production method includes: the raw steel coil is first unrolled into a strip steel for feeding and output through an unwinding machine, and then the deep bending roller follows the strip steel to press down, the primary straightening machine straightens the strip steel throughout the process, the welding machine welds the head and tail of adjacent strip steels, and the welded strip steel then passes through a looper and a tension roller group to a leveling machine, the leveling machine levels the strip steel to improve the plate shape and surface quality, and then passes through a multi-roll straightening machine to eliminate residual stress and further improve the plate shape, The strip is then sheared by a flying shear and finally coiled by a coiler to form a finished steel coil.