阅读说明：本技术 一种利用蛇形轧制制备板材的成套设备及其工艺方法 (Complete equipment for preparing plate by utilizing snake-shaped rolling and process method thereof ) 是由 王玉辉 徐龙飞 孔玲 郑亚楠 戚向东 彭艳 于 2021-09-03 设计创作，主要内容包括：本发明涉及一种利用蛇形轧制制备板材的成套设备及其工艺方法,包括蛇形轧机、参数调节装置、换辊装置和四辊式横移车；蛇形轧机工作辊之间错位量由工作辊沿支撑辊轴线圆周转动调节,蛇形轧机压下量由工作辊沿支撑辊轴线圆周转动和上支撑辊竖直压下共同参与调节,支撑辊连接电机带动工作辊转动,蛇形轧机通过调节辊速比和工作辊错位量既能实现蛇形轧制,也能进行同步轧制；四辊式横移车,可实现蛇形轧机四个轧辊的快速同时更换,缩短撤辊时间；利用蛇形轧机进行粗轧或者精轧时,采用蛇形轧制、反向蛇形轧制、同步轧制相结合的工艺方法,既能提高轧制渗透性,又能改善蛇形轧制后的板形问题,使蛇形轧制工艺应用到工业生产中。(The invention relates to complete equipment for preparing plates by utilizing snake-shaped rolling and a process method thereof, wherein the complete equipment comprises a snake-shaped rolling mill, a parameter adjusting device, a roller changing device and a four-roller type transverse moving vehicle; the offset between the working rolls of the serpentine rolling mill is adjusted by the circumferential rotation of the working rolls along the axes of the supporting rolls, the rolling reduction of the serpentine rolling mill is adjusted by the circumferential rotation of the working rolls along the axes of the supporting rolls and the vertical pressing of the upper supporting roll, the supporting roll is connected with a motor to drive the working rolls to rotate, and the serpentine rolling mill can realize serpentine rolling and can also carry out synchronous rolling by adjusting the speed ratio of the working rolls and the offset of the working rolls; the four-roller transverse moving vehicle can realize the quick and simultaneous replacement of four rollers of the snake-shaped rolling mill, and shorten the roller removing time; when a snake-shaped rolling mill is used for rough rolling or finish rolling, a process method combining snake-shaped rolling, reverse snake-shaped rolling and synchronous rolling is adopted, so that the rolling permeability can be improved, the plate shape problem after snake-shaped rolling can be improved, and the snake-shaped rolling process is applied to industrial production.)

1. A complete set of equipment for preparing plates by utilizing snake-shaped rolling is characterized in that: the equipment comprises a snake-shaped rolling mill, a parameter adjusting device, a roll changing device and a four-roll type transverse moving vehicle;

the snakelike rolling mill comprises a rolling mill frame, a supporting roll bearing seat, a working roll bearing seat, an upper supporting roll, an upper working roll, a lower working roll and a lower supporting roll; the rolling mill frames are symmetrically arranged at intervals; the upper supporting roll, the upper working roll, the lower working roll and the lower supporting roll are arranged between two sides of the rolling mill frame in sequence; the two ends of the upper supporting roller and the lower supporting roller are respectively connected with the rolling mill frame through supporting roller bearing seats; the two ends of the upper working roll and the lower working roll are respectively connected with the rolling mill frame through working roll bearing seats; the upper supporting roller and the lower supporting roller are respectively connected with two motors, the working roller is driven to rotate by using friction force, and when the roller speed ratio of the working roller has a transmission error and is not equal to the set different speed ratio, the rotating speeds of the two motors are respectively adjusted to ensure that the roller speed ratio keeps the set different speed ratio; the upper working roll and the lower working roll respectively deviate towards two sides of a vertical line passing through the axes of the upper supporting roll and the lower supporting roll, snake-shaped rolling is formed when the speed ratio of the upper working roll to the lower working roll is not 1, the upper working roll and the lower working roll respectively deviate towards one side of the vertical line passing through the axes of the upper supporting roll and the lower supporting roll by the same distance, and synchronous rolling is formed when the speed ratio of the upper working roll to the lower working roll is 1;

the parameter adjusting device comprises a vertical hydraulic cylinder, a deviation hydraulic cylinder and a rotating rod; the vertical hydraulic cylinder is arranged at the top of the rolling mill stand and is positioned at the top of the upper supporting roll; the offset hydraulic cylinder can simultaneously perform lifting linear movement along the vertical direction and reciprocating linear movement along the slab rolling direction; the offset hydraulic cylinders are respectively arranged on the left side and the right side of the working roll bearing seat, one end of each offset hydraulic cylinder is connected with the rolling mill frame, and the other end of each offset hydraulic cylinder is attached to the side face of the working roll bearing seat; the rotating rods are respectively connected between the centers of the supporting roller bearing seats and the working roller bearing seats on the same side;

the roll changing device comprises a supporting roll table, a working roll table, a supporting roll table hydraulic cylinder and a working roll table hydraulic cylinder; the bottom of the supporting roller way hydraulic cylinder is fixedly connected with a supporting roller way, and the bottom of the working roller way hydraulic cylinder is fixedly connected with a working roller way; the supporting roll tables are respectively arranged on two sides of the lower part of the upper supporting roll and two sides of the lower part of the lower supporting roll, and two ends of each supporting roll table are respectively controlled to stretch and retract along the plate blank rolling direction through a supporting roll table hydraulic cylinder; the working roll tables are respectively arranged on two sides of the lower part of the upper working roll and two sides of the lower part of the lower working roll, and two ends of each working roll table are respectively controlled to stretch and retract along the rolling direction of the plate blank by the working roll table hydraulic cylinders;

the four-roller type transverse moving vehicle comprises a roller clamp, a crane main hook, a crane auxiliary hook, an upper supporting roller channel, a lower supporting roller channel, an upper working roller channel, a lower working roller channel, a bearing plate, a transverse moving slideway and a trolley frame; the roller clamps are respectively arranged at the top and the bottom of the upper and the lower supporting roller channels and the upper and the lower working roller channels, the roller clamps can be translated in a reciprocating manner along the axial direction of the rollers, the crane main hook and the crane auxiliary hook are respectively connected to the bearing plate at the bottom of the upper working roller channel, the crane main hook is arranged at the front side of the crane auxiliary hook along the opening direction of the upper working roller channel, the transverse moving slideway is positioned at the bottom of the trolley frame, and the transverse moving slideway can enable the four-roller transverse moving trolley to be translated in a reciprocating manner along the rolling direction of a plate blank integrally; when the rollers are removed, the four-roller type transverse moving vehicle translates to one side of the rolling mill frame, which is provided with the rotating rod, by utilizing the transverse moving slideway, the roller clamps are respectively aligned to clamp the upper and lower supporting roller bearing seats and the upper and lower working roller bearing seats, the four rollers are drawn out along the roller table, and the four rollers respectively translate to the upper and lower supporting roller channels and the upper and lower working roller channels along with the roller clamps.

2. The plant for the production of plates by means of serpentine rolling according to claim 1, characterized in that: the rotating rod is a telescopic hydraulic rod, and a displacement sensor is arranged in the rotating rod; the dwang can with work roll bearing frame complete separation and reconnection, the dwang can shorten length to being less than the backing roll bearing frame radius.

3. The plant for the production of plates by means of serpentine rolling according to claim 2, characterized in that: the offset model of the upper working roll and the lower working roll is

Wherein, theta₁The connecting line of the upper working roll and the upper supporting roll forms an acute angle theta on a vertical line passing through the center of the upper supporting roll₂The acute angle theta formed by the connecting line of the lower working roll and the lower supporting roll on the vertical line passing through the center of the lower supporting roll₁、θ₂M is 0 on the same side of a vertical line passing through the center of the support roller, m is 1 on both sides, and θ is₁≥0，θ₂≥0；s_xH is the thickness of a slab outlet, delta P is the rolling force variation of the serpentine rolling mill, P is the rolling force of the serpentine rolling mill, K is the total length pressing rigidity of the serpentine rolling mill, delta B is the difference between the length of a working roll body and the width of a roll, R is the original radius of a supporting roll before the supporting roll is put into operation, R is the original radius of the working roll before the working roll radius is put into operation, f is the original radius of the working roll before the working roll is put into operation, f is the original radius of the working roll after the rolling roll is put into operation, f is the thickness of the slab outlet, and the delta P is the rolling force variation of the serpentine rolling mill₁The roll gap value increment at the middle point of the roll body of the upper working roll generated by the deformation of the roll system of the working roll and the supporting roll of the serpentine rolling mill, f₂The lower working roll is generated by the deformation of the working roll and the supporting roll of the serpentine rolling millRoll gap value increment at the midpoint of the roll body; C. a, D₁、D₂For the constant coefficient, s, of the width of the rolled piece₀Roll gap s corresponding to zero setting rolling force₁And the roll gap is set when the line connecting the center points of the working roll and the supporting roll and the vertical direction are zero.

4. A method for producing a plate by serpentine rolling using the apparatus of claim 3, said method comprising the steps of: s1, producing a continuous casting billet; s2, heating a continuous casting blank; s3, removing phosphorus by high-pressure water; s4, rough rolling and snake rolling; s5, rough rolling and reverse serpentine rolling; s6, rough rolling and synchronous rolling; s7, finish rolling and serpentine rolling; s8, finish rolling and reverse snake rolling; s9, finish rolling and synchronous rolling; s10, cooling; s11, straightening and shearing; s13, annealing;

the specific process of the steps S4 to S6 is as follows: collecting the process, plate and strip and rolling mill parameters of snakelike reversible rolling of the plate; the plate is coiled and rolled in the first pass, the plate shape flatness is detected after each pass of rolling, the coiled and rolled plate is continuously rolled in the next pass when the flatness is less than 10mm, and the plate shape is synchronously rolled in the next pass when the flatness is detected to be 10-20 mm to improve the plate shape; when the flatness of the detected plate shape is more than 20mm, reverse snake-shaped rolling is carried out in the next pass to improve the plate shape, and nine passes of rolling are carried out; performing synchronous rolling for correcting the plate shape in the tenth to fourteenth passes, and simultaneously improving the plate convexity through roller system intersection until the surface quality requirement of the plate reaches the qualified standard;

the specific process of the steps S7 to S9 is as follows: collecting parameters of a plate continuous rolling process, a plate strip and a rolling mill; the first and second passes adopt snake-shaped rolling, the third and fourth passes adopt reverse snake-shaped rolling, and the fifth to seventh passes adopt synchronous rolling.

5. A method for manufacturing a plate by means of serpentine rolling according to claim 3, characterized in that: the steps S4 to S6 adopt a serpentine rolling mill to carry out reversible rolling; the steps S7 to S9 adopt seven serpentine rolling mills for continuous rolling, and the unstable rolling tension of the plate caused by serpentine rolling at the stage can be compensated and adjusted by loop control.

Technical Field

The invention relates to the technical field of plate rolling forming, in particular to complete equipment for preparing a plate by utilizing snake-shaped rolling and a process method thereof.

Background

The snakelike rolling is a novel asymmetrical rolling technology for researching and improving the rolling permeability of a plate in recent years, the snakelike rolling is a rolling mode for improving the evolution of the bending problem after the asynchronous rolling, the snakelike rolling is realized by increasing the offset between upper and lower working rolls along the rolling direction on the basis of the asynchronous rolling, the bending after the rolling caused by the unequal linear speeds of the upper and lower working rolls in the rolling process is inhibited through the offset of the upper and lower working rolls, the plate can generate shearing stress in a plastic deformation area in the rolling process by adopting the snakelike rolling mode, so that the shearing strain is increased relative to the synchronous rolling in the plate rolling forming process, the total rolling strain of the center of the plate is more favorably increased, and the tissue uniformity of the rolled plate is improved.

The speed ratio and the dislocation quantity of each pass of the snake-shaped rolling are required to be adjusted and set in the actual production process, and the traditional rolling mill cannot meet the production requirements of the snake-shaped rolling; although theoretical analytical model researches are more in the curvature problem of bending after snake-shaped rolling of the medium and thick plate, the design of the actual production process of the plate shape correction problem after snake-shaped rolling of the medium and thick plate or the thin plate is less. Aiming at the current situation, the equipment structure of a novel snake-shaped rolling mill and the actual production process of snake-shaped rolling of medium and thin plates are deeply researched, so that the complete equipment and the process method for preparing the plates by using the snake-shaped rolling are provided in order to enable the plate rolling mill to continuously adjust the roller speed ratio and the dislocation quantity in the snake-shaped rolling and to be capable of producing the medium and thick plates or thin plates with good plate shapes and enable the snake-shaped rolling process to be applied to the actual industrial production, and the defects in the prior art are overcome.

Disclosure of Invention

Aiming at the problems, the invention aims to provide complete equipment for preparing a plate by utilizing snake-shaped rolling and a process method thereof, the snake-shaped rolling and synchronous rolling can be realized by adjusting the speed ratio of rollers and the dislocation amount between working rollers, the roller changing time is shortened by a quick roller changing device, the production efficiency of the snake-shaped rolling equipment is indirectly improved, and the rolling process design and optimization are carried out by utilizing the process mode of combining the snake-shaped rolling, reverse snake-shaped rolling and synchronous rolling, so that the rolling strain can be further improved, the crystal grains in the center of the plate can be refined, and the problem of the shape of the rolled plate caused by the snake-shaped rolling can be repaired.

The technical scheme adopted by the invention is as follows:

the complete equipment for preparing the plate by utilizing the snake-shaped rolling comprises a snake-shaped rolling mill, a parameter adjusting device, a roller changing device and a four-roller type transverse moving vehicle, wherein the snake-shaped rolling mill is arranged on the four-roller type transverse moving vehicle;

the snakelike rolling mill comprises a rolling mill frame, a supporting roll bearing seat, a working roll bearing seat, an upper supporting roll, an upper working roll, a lower working roll and a lower supporting roll; the rolling mill frames are symmetrically arranged at intervals; the upper supporting roll, the upper working roll, the lower working roll and the lower supporting roll are arranged between two sides of the rolling mill frame in sequence; the two ends of the upper supporting roller and the lower supporting roller are respectively connected with the rolling mill frame through supporting roller bearing seats; the two ends of the upper working roll and the lower working roll are respectively connected with the rolling mill frame through working roll bearing seats; the upper supporting roller and the lower supporting roller are respectively connected with two motors, the working roller is driven to rotate by using friction force, and when the roller speed ratio of the working roller has a transmission error and is not equal to the set different speed ratio, the rotating speeds of the two motors are respectively adjusted to ensure that the roller speed ratio keeps the set different speed ratio; the upper working roll and the lower working roll respectively deviate towards two sides of a vertical line passing through the axes of the upper supporting roll and the lower supporting roll, snake-shaped rolling is formed when the speed ratio of the upper working roll to the lower working roll is not 1, the upper working roll and the lower working roll respectively deviate towards one side of the vertical line passing through the axes of the upper supporting roll and the lower supporting roll by the same distance, and synchronous rolling is formed when the speed ratio of the upper working roll to the lower working roll is 1;

the parameter adjusting device comprises a vertical hydraulic cylinder, a deviation hydraulic cylinder and a rotating rod; the vertical hydraulic cylinder is arranged at the top of the rolling mill stand and is positioned at the top of the upper supporting roll; the offset hydraulic cylinder can simultaneously perform lifting linear movement along the vertical direction and reciprocating linear movement along the slab rolling direction; the offset hydraulic cylinders are respectively arranged on the left side and the right side of the working roll bearing seat, one end of each offset hydraulic cylinder is connected with the rolling mill frame, and the other end of each offset hydraulic cylinder is attached to the side face of the working roll bearing seat; the rotating rods are respectively connected between the centers of the supporting roller bearing seats and the working roller bearing seats on the same side;

the roll changing device comprises a supporting roll table, a working roll table, a supporting roll table hydraulic cylinder and a working roll table hydraulic cylinder; the bottom of the supporting roller way hydraulic cylinder is fixedly connected with a supporting roller way, and the bottom of the working roller way hydraulic cylinder is fixedly connected with a working roller way; the supporting roll tables are respectively arranged on two sides of the lower part of the upper supporting roll and two sides of the lower part of the lower supporting roll, and two ends of each supporting roll table are respectively controlled to stretch and retract along the plate blank rolling direction through a supporting roll table hydraulic cylinder; the working roll tables are respectively arranged on two sides of the lower part of the upper working roll and two sides of the lower part of the lower working roll, and two ends of each working roll table are respectively controlled to stretch and retract along the rolling direction of the plate blank by the working roll table hydraulic cylinders;

the four-roller type transverse moving vehicle comprises a roller clamp, a crane main hook, a crane auxiliary hook, an upper supporting roller channel, a lower supporting roller channel, an upper working roller channel, a lower working roller channel, a bearing plate, a transverse moving slideway and a trolley frame; the roller clamps are respectively arranged at the top and the bottom of the upper and the lower supporting roller channels and the upper and the lower working roller channels, the roller clamps can be translated in a reciprocating manner along the axial direction of the rollers, the crane main hook and the crane auxiliary hook are respectively connected to the bearing plate at the bottom of the upper working roller channel, the crane main hook is arranged at the front side of the crane auxiliary hook along the opening direction of the upper working roller channel, the transverse moving slideway is positioned at the bottom of the trolley frame, and the transverse moving slideway can enable the four-roller transverse moving trolley to be translated in a reciprocating manner along the rolling direction of a plate blank integrally; when the rollers are removed, the four-roller type transverse moving vehicle translates to one side of the rolling mill frame, which is provided with the rotating rod, by utilizing the transverse moving slideway, the roller clamps are respectively aligned to clamp the upper and lower supporting roller bearing seats and the upper and lower working roller bearing seats, the four rollers are drawn out along the roller table, and the four rollers respectively translate to the upper and lower supporting roller channels and the upper and lower working roller channels along with the roller clamps.

Furthermore, the rotating rod is a telescopic hydraulic rod, and a displacement sensor is arranged in the rotating rod; the dwang can with work roll bearing frame complete separation and reconnection, the dwang can shorten length to being less than the backing roll bearing frame radius.

Further, the offset model of the upper working roll and the lower working roll is

Wherein, theta₁The connecting line of the upper working roll and the upper supporting roll forms an acute angle theta on a vertical line passing through the center of the upper supporting roll₂The acute angle theta formed by the connecting line of the lower working roll and the lower supporting roll on the vertical line passing through the center of the lower supporting roll₁、θ₂M is 0 on the same side of a vertical line passing through the center of the support roller, m is 1 on both sides, and θ is₁≥0，θ₂≥0；s_xH is the thickness of a slab outlet, delta P is the rolling force variation of the serpentine rolling mill, P is the rolling force of the serpentine rolling mill, K is the total length pressing rigidity of the serpentine rolling mill, delta B is the difference between the length of a working roll body and the width of a roll, R is the original radius of a supporting roll before the supporting roll is put into operation, R is the original radius of the working roll before the working roll radius is put into operation, f is the original radius of the working roll before the working roll is put into operation, f is the original radius of the working roll after the rolling roll is put into operation, f is the thickness of the slab outlet, and the delta P is the rolling force variation of the serpentine rolling mill₁The roll gap value increment at the middle point of the roll body of the upper working roll generated by the deformation of the roll system of the working roll and the supporting roll of the serpentine rolling mill, f₂The roll gap value increment at the middle point of the roll body of the lower working roll is generated by the deformation of the working roll and the supporting roll system of the serpentine rolling mill; C. a, D₁、D₂For the constant coefficient, s, of the width of the rolled piece₀Roll gap s corresponding to zero setting rolling force₁And the roll gap is set when the line connecting the center points of the working roll and the supporting roll and the vertical direction are zero.

A method of making a plate by serpentine rolling comprising the steps of: s1, producing a continuous casting billet; s2, heating a continuous casting blank; s3, removing phosphorus by high-pressure water; s4, rough rolling and snake rolling; s5, rough rolling and reverse serpentine rolling; s6, rough rolling and synchronous rolling; s7, finish rolling and serpentine rolling; s8, finish rolling and reverse snake rolling; s9, finish rolling and synchronous rolling; s10, cooling; s11, straightening and shearing; s13, annealing;

the specific process of the steps S4 to S6 is as follows: collecting the process, plate and strip and rolling mill parameters of snakelike reversible rolling of the plate; the plate is coiled and rolled in the first pass, the plate shape flatness is detected after each pass of rolling, the coiled and rolled plate is continuously rolled in the next pass when the flatness is less than 10mm, and the plate shape is synchronously rolled in the next pass when the flatness is detected to be 10-20 mm to improve the plate shape; when the flatness of the detected plate shape is more than 20mm, reverse snake-shaped rolling is carried out in the next pass to improve the plate shape, and nine passes of rolling are carried out; performing synchronous rolling for correcting the plate shape in the tenth to fourteenth passes, and simultaneously improving the plate convexity through roller system intersection until the surface quality requirement of the plate reaches the qualified standard;

the specific process of the steps S7 to S9 is as follows: collecting parameters of a plate continuous rolling process, a plate strip and a rolling mill; the first and second passes adopt snake-shaped rolling, the third and fourth passes adopt reverse snake-shaped rolling, and the fifth to seventh passes adopt synchronous rolling.

Further, the steps S4 to S6 are performed by reversible rolling with a serpentine rolling mill; the steps S7 to S9 adopt seven serpentine rolling mills for continuous rolling, and the unstable rolling tension of the plate caused by serpentine rolling at the stage can be compensated and adjusted by loop control.

Compared with the prior art, the invention has the following beneficial effects:

1. the traditional rolling mill is changed into a snake-shaped rolling mill, working rolls of the snake-shaped rolling mill can circumferentially rotate along the axes of supporting rolls, the displacement between upper and lower working rolls of the snake-shaped rolling mill is respectively adjusted by the upper and lower working rolls along the circumferential rotation of the axes of the upper and lower supporting rolls, the rolling reduction of the snake-shaped rolling mill is jointly adjusted by the upper and lower working rolls along the circumferential rotation of the axes of the upper and lower supporting rolls and the vertical pressing of the upper supporting roll, the upper and lower supporting rolls are connected with a motor to drive the working rolls to rotate, and the snake-shaped rolling mill can realize snake-shaped rolling and can also carry out synchronous rolling by adjusting the speed ratio of the working rolls and the displacement of the working rolls;

2. the serpentine rolling mill is adopted to roll the medium plate and the thin plate in a process mode of combining serpentine rolling, reverse serpentine rolling and synchronous rolling, so that rolling strain can be further improved, plate crystal grains can be refined, and the problem of rolled plate shape caused by serpentine rolling can be solved;

3. the four-roller type transverse moving vehicle is adopted, so that the four rollers of the snake-shaped rolling mill can be quickly and simultaneously replaced, and the roller withdrawing time is shortened.

Drawings

FIG. 1 is a schematic structural view of a serpentine rolling mill according to the present invention;

FIG. 2 is a schematic structural view of a snake-shaped rolling mill parameter adjusting device and a roll changing device according to the present invention;

FIG. 3 is a schematic view of the four-roller type traverse vehicle according to the present invention;

FIG. 4 is a schematic view of the position of the four-high shuttle car and the serpentine mill during roll withdrawal in accordance with the present invention;

FIG. 5 is a schematic overall flow diagram of the process of the present invention;

FIG. 6 is a schematic diagram of three rolling modes in the rough rolling stage of the present invention;

FIG. 7 is a schematic view of the rolling process during the rough rolling stage of the present invention;

FIG. 8 is a schematic view of the layout of the rolling mill at the finishing stage of the present invention;

FIG. 9 is a schematic view of the rolling process at the finishing rolling stage of the present invention.

Wherein, the reference numbers: 1-a vertical hydraulic cylinder; 2-supporting the roller bearing seat; 3-rotating the rod; 4-supporting roller bed hydraulic cylinder; 5-a deflection hydraulic cylinder; 6-working roll bearing seats; 7-working roll table hydraulic cylinder; 8-supporting roller bed; 9-a working roll table; 10-a mill housing; 11-upper support rollers; 12-an upper motor; 13-upper work roll; 14-a slab; 15-lower motor; 16-lower work roll; 17-a lower support roll; 18-a displacement sensor; 19-crane main hook; 20-auxiliary hook of crane; 21-roll clamps; 22-upper support roll channel; 23-upper work roll channel; 24-a carrier plate; 25-lower work roll channel; 26-a lower support roller table; 27-a trolley frame; 28-a transverse moving slideway; F1-F7-seven serpentine mills.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

It should be noted that in the description of the present invention, the terms "upper", "lower", "top", "bottom", "front", "back", "one side", "the other side", "left", "right", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not mean that a device or an element must have a specific orientation, be configured in a specific orientation, and be operated.

Referring to fig. 1 to 4, a detailed structure of an embodiment of a plant for manufacturing a plate by using serpentine rolling according to the present invention is shown. The equipment comprises a snake-shaped rolling mill, a parameter adjusting device, a roll changing device and a four-roll type transverse moving vehicle;

the snake-shaped rolling mill comprises a rolling mill frame 10, a supporting roll bearing seat 2, a working roll bearing seat 6, an upper supporting roll 11, an upper working roll 13, a lower working roll 16 and a lower supporting roll 17; the rolling mill frames 10 are symmetrically arranged at certain intervals; the upper supporting roll 11, the upper working roll 13, the lower working roll 16 and the lower supporting roll 17 are sequentially and longitudinally arranged between two sides of the rolling mill frame 10; the two ends of the upper supporting roll 11 and the lower supporting roll 17 are respectively connected with the rolling stand 10 through supporting roll bearing seats 2; the two ends of the upper working roll 13 and the lower working roll 16 are respectively connected with the rolling mill frame 10 through the working roll bearing seats 6; the upper supporting roller 11 and the lower supporting roller 17 are respectively connected with the upper motor 12 and the lower motor 15, the working rollers are driven to rotate by friction, and when the roller speed ratio of the working rollers has transmission errors and is not equal to the set different speed ratio, the rotating speeds of the two motors are respectively adjusted to enable the roller speed ratio to keep the set different speed ratio.

The displacement between the upper working roll 13 and the lower working roll 16 of the serpentine rolling mill is adjusted by the circumferential rotation of the working rolls along the axes of the supporting rolls respectively, and the rolling reduction of the serpentine rolling mill is adjusted by the circumferential rotation of the upper working roll 13 and the lower working roll 16 along the axes of the upper supporting roll 11 and the lower supporting roll 17 respectively and the vertical pressing of the upper supporting roll 11; through the offset distance of control work roll, can realize that snakelike rolling mill carries out snakelike rolling and synchronous rolling, go up work roll 13 and lower work roll 16 and form snakelike rolling respectively to the vertical line both sides skew of crossing upper and lower backing roll axle center and upper and lower work roll speed ratio not for 1 time, go up work roll 13 and lower work roll 16 and form synchronous rolling respectively to crossing the same distance of vertical line one side skew of upper and lower backing roll axle center and upper and lower work roll speed ratio for 1 time.

The calculation method of the transverse displacement of the upper working roll 13 and the lower working roll 16 is as follows:

s_x＝|(R+r-f₁)sinθ₁-(-1)^m(R+r-f₂)sinθ₂|

the calculation method of the outlet thickness of the slab rolled by the serpentine rolling mill comprises the following steps:

wherein theta is₁The connecting line of the upper working roll 13 and the upper supporting roll 11 forms an acute angle theta on a vertical line passing through the center of the upper supporting roll₂Is an acute angle theta formed by the connecting line of the lower working roll 16 and the lower supporting roll 17 on the vertical line passing through the center of the lower supporting roll 17₁、θ₂M is 0 on the same side of a vertical line passing through the center of the support roller, m is 1 on both sides, and θ is₁≥0，θ₂≥0；s_xThe transverse displacement between the upper working roll and the lower working roll is h is the outlet thickness of the plate blank 14, and delta P is the rolling force variation of the serpentine rolling millP is the rolling force of the serpentine rolling mill, K is the full-length pressing rigidity of the serpentine rolling mill, Delta B is the difference between the length of the working roll body and the width of the roll, R is the original radius of the support roll before the work, R is the original radius of the working roll before the work, f₁The roll gap value increment at the middle point of the roll body of the upper working roll 13 generated by the deformation of the roll system of the working roll and the supporting roll of the serpentine rolling mill, f₂The roll gap value increment at the middle point of the roll body of a lower working roll 16 generated by the deformation of a working roll and a supporting roll system of the serpentine rolling mill; C. a, D₁、D₂For the constant coefficient, s, of the width of the rolled piece₀Roll gap, s, for zero setting of rolling force₁The roll gap is set when the line connecting the center points of the working roll and the supporting roll and the vertical direction are zero.

The parameter adjusting device comprises a vertical hydraulic cylinder 1, a deviation hydraulic cylinder 5 and a rotating rod 3; the vertical hydraulic cylinders 1 are respectively arranged at the top of the rolling mill stand 10 and positioned at the top of the upper supporting roll 11; the offset hydraulic cylinders 5 are respectively arranged on the left side and the right side of the work roll bearing seat 6, one end of each offset hydraulic cylinder 5 is connected with the rolling mill stand 10, and the other end of each offset hydraulic cylinder 5 is attached to the side face of the work roll bearing seat 6; the rotating rods 3 are respectively connected between the centers of the supporting roller bearing seats 2 and the working roller bearing seats 6 which are positioned on the same side; the offset hydraulic cylinder 5 can simultaneously perform lifting linear movement along the vertical direction and reciprocating linear movement along the slab rolling direction, the offset hydraulic cylinder 5 is used for pushing the working roll bearing seat 6 to realize that the working roll rotates along the axis circumference of the supporting roll, the center of the working roll bearing seat 6 is connected with the center of the supporting roll bearing seat 2 through the rotating rod 3, the rotating rod 3 is a telescopic hydraulic rod, the displacement sensor 18 is arranged in the rotating rod, the displacement sensor 18 in the rotating rod 3 detects the rotating displacement and the angle of the working roll in real time when the working roll rotates, and the rotating rod 3 compensates the tiny offset error of the offset hydraulic cylinder 5 through rotation and telescopic motion; the vertical pressing parameter adjustment of the upper supporting roller 11 is controlled by the lifting motion of the vertical hydraulic cylinder 1 in the vertical direction.

The roll changing device comprises a supporting roll table 8, a working roll table 9, a supporting roll table hydraulic cylinder 4 and a working roll table hydraulic cylinder 7; the bottom of the supporting roller way hydraulic cylinder 4 is fixedly connected with the supporting roller 8, and the bottom of the working roller way hydraulic cylinder 7 is fixedly connected with the working roller way 9; the supporting roll tables 8 are respectively arranged on two sides of the lower part of the upper supporting roll 11 and two sides of the lower part of the lower supporting roll 17, and two ends of each supporting roll table 8 are respectively controlled to stretch and retract along the rolling direction of the plate blank by the supporting roll table hydraulic cylinders 4; the working roll tables 9 are respectively arranged on two sides of the lower part of the upper working roll 13 and two sides of the lower part of the lower working roll 16, and two ends of the working roll tables 9 are respectively controlled to stretch and retract along the slab rolling direction through the working roll table hydraulic cylinders 7.

The four-roller type transverse moving vehicle comprises a roller clamp 21, a crane main hook 19, a crane auxiliary hook 20, an upper supporting roller channel 22, a lower supporting roller channel 26, an upper working roller channel 23, a lower working roller channel 25, a bearing plate 24, a transverse moving slideway 28 and a trolley frame 27; the roller clamps 21 are arranged at the top and the bottom of an upper supporting roller channel, a lower supporting roller channel and an upper working roller channel and a lower working roller channel, the roller clamps 21 can perform reciprocating translation along the axial direction of the rollers, the crane main hook 19 and the crane auxiliary hook 20 are respectively connected to the bearing plate 24 at the bottom of the upper working roller channel 23, the crane main hook 19 is arranged at the front side of the crane auxiliary hook 20 along the opening direction of the upper working roller channel 23, the transverse moving slide 28 is arranged at the bottom of the trolley frame 27, and the transverse moving slide 28 can enable the four-roller transverse moving trolley to perform reciprocating translation along the slab rolling direction.

The support roll track 8 and the working roll table 9 can realize the telescopic motion of the roll tables along the rolling direction of the plate blank by respectively utilizing the hydraulic system control in the support roll table hydraulic cylinder 4 and the working roll table hydraulic cylinder 7 to control the distance between the roll tables and the roll; when the snake-shaped rolling mill is in normal production, the working roll roller way 9 and the supporting roll roller way 8 are not in contact with the roller, when the roller needs to be changed, the deviation hydraulic cylinder 5 and the rotating rod 3 jointly control the working roll to move so as to separate the working roll from the supporting roll, the supporting roll track 8 and the working roll roller way 9 respectively carry out telescopic motion along the rolling direction through the supporting roll roller way hydraulic cylinder 4 and the working roll roller way hydraulic cylinder 7, so that the supporting roll track 8 and the working roll roller way 9 are respectively in contact with the supporting roll and the working roll, then the rotating rod 3 shortens the length and is completely separated from the working roll chock 6, the rotating rod 3 is only connected with the supporting roll chock 2 and shortens the length to be smaller than the radius of the supporting roll chock 2, the four-roll type cross-moving vehicle utilizes the cross-moving slide 28 to move to one side of the rolling mill frame 10, which is provided with the rotating rod 3, and the roller clamps 21 respectively aim at the upper and lower supporting roll chocks and the upper and lower working roll chocks, the four-roller type traverse car draws out the rollers along the roller way by using the roller clamp 21 and shares the load by the crane main hook 19 and the crane auxiliary hook 20, the rollers are respectively translated into the upper supporting roller channel 22, the lower supporting roller channel 26, the upper working roller channel 23 and the lower working roller channel 25 along with the roller clamp 21, after the rollers are completely drawn out, the transverse moving of the four-roller type traverse car is realized by using the transverse moving slideway 28 so as to replace four new rollers, and after the new rollers are pushed into the rolling mill frame 10 by using the four-roller type traverse car, the extension rod piece of the rotating rod 3 is connected and fixed with the working roller bearing seat 6 again.

A method for manufacturing a plate by means of serpentine rolling, as shown in figures 5 to 9, comprising the following steps: s1, producing a continuous casting billet; s2, heating a continuous casting blank; s3, removing phosphorus by high-pressure water; s4, rough rolling and snake rolling; s5, rough rolling and reverse serpentine rolling; s6, rough rolling and synchronous rolling; s7, finish rolling and serpentine rolling; s8, finish rolling and reverse snake rolling; s9, finish rolling and synchronous rolling; s10, cooling; s11, straightening and shearing; s13, annealing; the steps S1 to S3 and S10 to S13 may be implemented in the same manner as the prior art.

The specific process of the steps S4 to S6 is as follows: collecting the process, plate and strip and rolling mill parameters of snakelike reversible rolling of the plate; the method comprises the following steps that S-shaped rolling is carried out on a plate blank 10 in a first pass, plate shape flatness is detected after each pass of rolling, S-shaped rolling is continued in the next pass when the flatness is smaller than 10mm, and plate shape is improved by carrying out synchronous rolling in the next pass when the plate shape flatness is detected to be 10-20 mm; when the flatness of the detected plate shape is more than 20mm, reverse snake-shaped rolling is carried out in the next pass to improve the plate shape, and nine passes of rolling are carried out; and performing synchronous rolling for correcting the plate shape in the tenth to fourteenth passes, and improving the plate convexity through roller system intersection until the surface quality requirement of the plate reaches the qualified standard.

The specific process of the steps S7 to S9 is as follows: collecting parameters of a plate continuous rolling process, a plate strip and a rolling mill; the first and second passes adopt snake-shaped rolling, the third and fourth passes adopt reverse snake-shaped rolling, and the fifth to seventh passes adopt synchronous rolling.

The steps S4 to S6 are reversible rolling with a serpentine rolling mill.

The steps S7 to S9 adopt seven serpentine rolling mills for continuous rolling, and the unstable rolling tension of the plate caused by serpentine rolling at the stage can be compensated and adjusted by loop control.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solution of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the spirit of the present invention.