阅读说明：本技术 一种用于带钢粗轧轧制过程中的压翘头装置及方法 (Head pressing and warping device and method used in rough rolling process of strip steel ) 是由 张仁其 吴海飞 沈间 王诚 高群永 江小军 胡定铌 于 2019-03-19 设计创作，主要内容包括：本发明揭示了一种用于带钢粗轧轧制过程中的压翘头装置及方法,涉及轧钢自动控制技术领域,压翘头装置安装在辊道上方,包括压块、链条、钢丝绳、支架、电机、绳盘、滑轮,压块通过链条与钢丝绳一端相连；滑轮固定安装在支架上,钢丝绳另一端穿过滑轮与绳盘固定连接；绳盘固定安装在电机上,钢丝绳通过电机、绳盘及滑轮拉动。本发明利用设置在辊道旁的翘扣头检测装置,确定带钢的翘头高度,依据后续机架入口设备的高度判断翘头带钢能否进入机架轧制,如果翘头高度超过了后机架入口设备的高度,则通过控制设置在两个机架间的辊道上方的压翘头装置,自动进行平整后再进行后续轧制,减少废钢和故障停机。(The invention discloses a nose pressing device and a nose pressing method used in a rough rolling process of strip steel, and relates to the technical field of automatic control of steel rolling, wherein the nose pressing device is arranged above a roller way and comprises a pressing block, a chain, a steel wire rope, a bracket, a motor, a rope disc and a pulley, and the pressing block is connected with one end of the steel wire rope through the chain; the pulley is fixedly arranged on the bracket, and the other end of the steel wire rope penetrates through the pulley and is fixedly connected with the rope disc; the rope reel is fixedly installed on the motor, and the steel wire rope is pulled through the motor, the rope reel and the pulley. According to the invention, the warping head detection device arranged beside the roller way is utilized to determine the warping head height of the strip steel, whether the warped strip steel can enter the rack for rolling is judged according to the height of subsequent rack inlet equipment, and if the warping head height exceeds the height of the subsequent rack inlet equipment, the warping head pressing device arranged above the roller way between the two racks is controlled to automatically level and then perform subsequent rolling, so that the steel scrap and fault shutdown are reduced.)

1. The utility model provides a pressure first device that sticks up for in belted steel rough rolling process which characterized in that: the head pressing and raising device is arranged above the roller way and comprises a pressing block, a chain, a steel wire rope, a bracket, a motor, a rope disc and a pulley, wherein the pressing block is connected with one end of the steel wire rope through the chain; the pulley is fixedly arranged on the bracket, and the other end of the steel wire rope penetrates through the pulley and is fixedly connected with the rope disc; the rope reel is fixedly installed on the motor, and the steel wire rope is pulled through the motor, the rope reel and the pulley.

2. The nose presser for use in the roughing rolling of strip steel as claimed in claim 1, wherein said presser bar is fixedly mounted with 4 chains; on the gravity center point of the pressing block, the chain is connected with a steel wire rope for pulling the pressing block to move up and down, and the steel wire rope suspends the pressing block above the roller way through a pulley on the bracket.

3. The apparatus of claim 2, wherein the segments are hingedly connected to the chain.

4. The apparatus according to claim 1, wherein the motor is provided with an encoder for controlling the elevation and the descent of the briquetting.

5. The apparatus according to claim 1, wherein the supporter is provided with a limit stopper for detecting whether the pressing block is raised to an upper limit.

6. A nose raising method for use in a roughing rolling process of a strip according to any one of claims 1 to 5, comprising the steps of:

s1, detecting the height of the warping head of the strip steel by using a warping buckle head detection device, and judging whether the strip steel needs to be leveled or not;

when the strip steel is rolled by the first rack, the head of the strip steel in odd number passes is detected by the buckle head detection device arranged on the edge of the roller way and takes the shape of the head, the image is transmitted to the image processing computer through the data cable, the head shape data of the plate blank is divided by the image processing algorithm and is transmitted to the control algorithm for calculating the warping direction and the warping degree, then whether flattening is needed or not is determined according to the warping degree, and if the height of the buckle head exceeds the height Xmm of the inlet equipment of the second rack, a head pressing program is started;

s2, immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

s3, tracking the head position of the warped strip steel, stopping conveying the strip steel in seconds after the roller bed delays X when the photoelectric tube detects that the strip steel arrives, and stopping the strip steel on the roller bed;

s4, starting the nose pressing operation by the nose pressing device, enabling the motor to rotate forwards, enabling the wire rope and the pressing block to descend by the rotation of the rope reel, counting by the encoder behind the motor, calculating to stop when the pressing block reaches a set position, and flattening the nose after the pressing block presses the strip steel; the motor rotates reversely, and the rope disc rotates to enable the steel wire rope and the pressing block to ascend to a stop position;

s5, starting the roller way to rotate forward, accelerating to X m/S, and sending the strip steel to a second rack for rolling;

and S6, starting the front unit operation of the first frame to continue.

7. The nose raising method for use in a roughing rolling process of a strip as claimed in claim 6 further comprising a manual nose raising operation comprising the steps of:

1) if the warping buckle head detection device is not available or fails, an operator judges that the warping head is too high and needs to be pressed down;

2) immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

3) the operator judges that the head of the warped head strip steel is positioned below the head pressing device, the roller way conveying is manually stopped, and the strip steel is stopped on the roller way;

4) an operator operates the head pressing and raising device to start head pressing and raising operation, the motor rotates forwards, the rope reel rotates to enable the steel wire rope and the pressing block to descend, and the raising head is flattened after the pressing block presses the strip steel; then the motor is controlled to rotate reversely, and the rope disc rotates to enable the steel wire rope and the pressing block to ascend to a stop position;

5) starting the roller way to rotate forwards, accelerating to the speed of X meters per second, and sending the strip steel to a second rack for rolling;

6) and starting the front unit of the first frame to continue the operation.

Technical Field

The invention relates to the technical field of steel rolling automatic control, in particular to a head pressing and warping device and method used in the rough rolling process of strip steel.

Background

The hot rolled strip steel is influenced by factors such as temperature difference between the upper surface and the lower surface of a plate blank, diameter difference between an upper roller and a lower roller, rotating speed difference, deformation rate and the like in the rolling process, so that the phenomenon of warping or buckling of the plate blank in the rolling process can be caused. The term "warping and heading" means that the strip head is bitten into the roll and then bent upward or downward at the exit side, and the upward bending is called "warping" and the downward bending is called "heading". When the head of the strip blank after rough rolling and buckle head reach a certain degree, the damage is very large, such as the biting of the next pass can be influenced, and steel piling can be caused when the serious condition is serious; equipment such as a descaling box, a heat-insulating cover and a conveying roller way can be impacted to cause equipment damage; in addition, when the buckling head is serious, some equipment on the middle roller way, such as an edge heater, cannot be used, and the quality of a product is affected. Therefore, the control of the buckle head of the strip blank is very necessary in production. With the development of rolling technology, the automation degree of the rolling process is higher and higher, a plurality of automatic detection and control technologies of the button raising head in the rough rolling process are invented, and the technologies enable the button raising head control to realize full-automatic adjustment.

The conventional process flow of the rough rolling area is as follows: the continuous casting plate blank with the thickness of 210 plus 250mm is heated to about 1200 ℃ by a heating furnace, enters a first rack for rolling for one pass or three passes after being descaled by a high-pressure water descaling box, and is then rolled for multiple passes in a second rack to form an intermediate blank with the thickness of 36-65mm, and the intermediate blank is subjected to finish rolling and coiling in a subsequent unit. However, because the steel type, the specification, the furnace temperature and the like are always changed in a rolling plan, the warping buckle head coefficient is also always changed, the situation that the control of the warping buckle head of the strip steel is not in place sometimes happens inevitably, particularly, the strip steel is seriously warped after the last pass of rolling of the first rack of the roughing mill, the warping head height exceeds the height of the inlet equipment of the second rack, the strip steel is propped against the inlet equipment, the fault that the strip steel cannot enter the second rack for rolling occurs, and the warped strip steel can only be manually flattened or cut to be treated as scrap steel.

Patent CN2860650 discloses a rolling line elevation adjusting device of a rough mill and a medium (wide) heavy plate mill for hot continuous rolling of strip steel, which can be adjusted between passes, and has simple and compact structure and high working efficiency. The device sets up the lifting jar of the perpendicular lifting bearing frame of accessible lifting track in the frame, and the supporting pad that sets up between bearing frame and frame is the ladder pad, and the bearing frame supports on the ladder face of ladder pad through the circular arc pad, and the ladder is gone up and is connected with horizontal push-and-pull mechanism. The horizontal push-pull mechanism is adjusted to enable the bearing seat to be supported on different step surfaces of the step pad through the arc pad, so that the up-and-down adjustment of the rolling line height mark can be rapidly carried out between each pass, the structure is simple and compact, the adjustment range is large, the working efficiency is high, the rolling line height compensation can be carried out after the rollers are worn, the rolling of austenitic stainless steel is met, the phenomena of head knocking and head warping can be reduced when other steel types are rolled, and the horizontal push-pull mechanism can be widely used for a roughing mill and a medium (wide) plate mill for hot continuous rolling of strip steel.

Patent CN1978081 discloses a rolling line elevation adjusting device of a roughing mill and a medium (wide) heavy plate mill for hot continuous rolling of strip steel, which can be adjusted between passes, and has simple and compact structure and high working efficiency. The device sets up the lifting jar of the perpendicular lifting bearing frame of accessible lifting track in the frame, and the supporting pad that sets up between bearing frame and frame is the ladder pad, and the bearing frame supports on the ladder face of ladder pad through the circular arc pad, and the ladder is gone up and is connected with horizontal push-and-pull mechanism. The horizontal push-pull mechanism is adjusted to enable the bearing seat to be supported on different step surfaces of the step pad through the arc pad, so that the up-and-down adjustment of the rolling line height mark can be rapidly carried out between each pass, the structure is simple and compact, the adjustment range is large, the working efficiency is high, the rolling line height compensation can be carried out after the rollers are worn, the rolling of austenitic stainless steel is met, the phenomena of head knocking and head warping can be reduced when other steel types are rolled, and the horizontal push-pull mechanism can be widely used for a roughing mill and a medium (wide) plate mill for hot continuous rolling of strip steel.

The above patents are all technologies for preventing and controlling the generation of the buckle head, and can not perform rapid treatment under the condition that the buckle head of the strip steel occurs, thereby ensuring that the strip steel can perform subsequent rolling and avoiding steel scrap accidents.

Disclosure of Invention

Technical problem to be solved

The invention aims to provide a nose pressing device and a nose pressing method for the rough rolling process of strip steel, aiming at solving the defect that the nose bending condition of the strip steel cannot be quickly processed in the rolling process of the hot rolled strip steel.

(II) technical scheme

A nose pressing device used in the rough rolling process of strip steel is arranged above a roller way and comprises a pressing block, a chain, a steel wire rope, a bracket, a motor, a rope disc and a pulley, wherein the pressing block is connected with one end of the steel wire rope through the chain; the pulley is fixedly arranged on the bracket, and the other end of the steel wire rope penetrates through the pulley and is fixedly connected with the rope disc; the rope reel is fixedly installed on the motor, and the steel wire rope is pulled through the motor, the rope reel and the pulley.

According to an embodiment of the invention, 4 chains are fixedly arranged on the pressing block; on the gravity center point of the pressing block, the chain is connected with a steel wire rope for pulling the pressing block to move up and down, and the steel wire rope suspends the pressing block above the roller way through a pulley on the bracket.

According to an embodiment of the invention, the press block is hingedly connected to the chain.

According to an embodiment of the invention, the motor is provided with an encoder for controlling the ascending and descending height of the briquetting.

According to an embodiment of the invention, the bracket is provided with a limit for detecting whether the pressure block rises to an upper limit.

A head warping method used in the rough rolling process of strip steel comprises the following steps:

s1, detecting the height of the warping head of the strip steel by using a warping buckle head detection device, and judging whether the strip steel needs to be leveled or not;

when the strip steel is rolled by the first rack, the head of the strip steel in odd number passes is detected by the buckle head detection device arranged on the edge of the roller way and takes the shape of the head, the image is transmitted to the image processing computer through the data cable, the head shape data of the plate blank is divided by the image processing algorithm and is transmitted to the control algorithm for calculating the warping direction and the warping degree, then whether flattening is needed or not is determined according to the warping degree, and if the height of the buckle head exceeds the height Xmm of the inlet equipment of the second rack, a head pressing program is started;

s2, immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

s3, tracking the head position of the warped strip steel, stopping conveying the strip steel in seconds after the roller bed delays X when the photoelectric tube detects that the strip steel arrives, and stopping the strip steel on the roller bed;

s4, starting the nose pressing operation by the nose pressing device, enabling the motor to rotate forwards, enabling the wire rope and the pressing block to descend by the rotation of the rope reel, counting by the encoder behind the motor, calculating to stop when the pressing block reaches a set position, and flattening the nose after the pressing block presses the strip steel; the motor rotates reversely, and the rope disc rotates to enable the steel wire rope and the pressing block to ascend to a stop position;

s5, starting the roller way to rotate forward, accelerating to X m/S, and sending the strip steel to a second rack for rolling;

and S6, starting the front unit operation of the first frame to continue.

According to an embodiment of the present invention, the method further comprises a manual nose curling operation, comprising the steps of:

1) if the warping buckle head detection device is not available or fails, an operator judges that the warping head is too high and needs to be pressed down;

2) immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

3) the operator judges that the head of the warped head strip steel is positioned below the head pressing device, the roller way conveying is manually stopped, and the strip steel is stopped on the roller way;

4) an operator operates the head pressing and raising device to start head pressing and raising operation, the motor rotates forwards, the rope reel rotates to enable the steel wire rope and the pressing block to descend, and the raising head is flattened after the pressing block presses the strip steel; then the motor is controlled to rotate reversely, and the rope disc rotates to enable the steel wire rope and the pressing block to ascend to a stop position;

5) starting the roller way to rotate forwards, accelerating to the speed of X meters per second, and sending the strip steel to a second rack for rolling;

6) and starting the front unit of the first frame to continue the operation.

(III) advantageous effects

The technical scheme is adopted, the nose pressing device and the nose pressing method for the rough rolling process of the strip steel are used, the nose pressing detection device arranged beside a roller way is utilized to determine the nose height of the strip steel, whether the nose strip steel can enter the machine frame for rolling is judged according to the height of subsequent machine frame inlet equipment, if the nose height exceeds the height of the subsequent machine frame inlet equipment, the nose pressing device arranged above the roller way between two machine frames is controlled to automatically level and then perform subsequent rolling, scrap steel and fault shutdown are reduced, and fault expansion and damage to the equipment caused by misoperation of operators can be prevented.

Drawings

In the present invention, like reference numerals refer to like features throughout, wherein:

FIG. 1 is a schematic diagram of a rough rolling structure of a strip steel.

Fig. 2 is a schematic structural view of the nose-curling device of the present invention.

FIG. 3 is a schematic view of a compact structure.

Fig. 4 is a flow chart of the head curling method of the present invention.

Description of reference numerals:

1. a first frame; 2. a second frame; 3. strip steel; 4. a buckle head detection device; 5. a nose raising device; 6. a photoelectric tube; 7. an access device of the second rack; 51. briquetting; 52. a chain; 53. a wire rope; 54. a support; 55. a motor; 56. a rope reel; 57. a pulley.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

The rough rolling structure schematic diagram of the strip steel is shown in figure 1, a continuous casting plate blank with the thickness of 210-250mm is heated to about 1200 ℃ by a heating furnace, is descaled by a high-pressure water descaling box, then enters a first rack 1 to be rolled for one pass or three passes, is rolled for multiple passes in a second rack 2, and is rolled into an intermediate blank with the thickness of 36-65mm for a subsequent unit to be subjected to finish rolling and coiling. Because the steel type, the specification, the furnace temperature and the like in a rolling plan are changed all the time, the warping buckle coefficient is also changed all the time, the situation that the warping buckle of the strip steel 3 is not controlled in place sometimes is inevitable, particularly, the strip steel 3 after the last pass of rolling of the first rack 1 of the roughing mill is seriously warped, the warping height exceeds the height of the inlet equipment 7 of the second rack, the strip steel can be propped against the inlet equipment 7, the fault that the strip steel cannot enter the second rack 2 for rolling is caused, and the warped strip steel 3 can only be manually flattened or cut to be treated as scrap steel.

Different from the finishing and straightening of the strip steel, the flat plate type of the strip steel has very high requirements, the warping of the strip steel in the rough rolling process is flat only by flattening the warping part, and the warping height is only required to be lower than that of inlet equipment of a rear frame; and because the strip steel rolled in the rough rolling area is rolled at the high temperature of about 1100 ℃, the deformation resistance is not very large, so the flattening device does not need to be very complicated and strong.

With reference to fig. 2 and 3, a nose raising device for rough rolling of strip steel is installed above a roller bed, and comprises a pressing block 51, a chain 52, a steel wire rope 53, a bracket 54, a motor 55, a rope reel 56 and a pulley 57, wherein the pressing block 51 is connected with one end of the steel wire rope 53 through the chain 52; the pulley 57 is fixedly arranged on the bracket 54, and the other end of the steel wire rope 53 passes through the pulley 57 and is fixedly connected with the rope disc 56; the rope disc 56 is fixedly arranged on the motor 55, and the steel wire rope is pulled by the motor 55, the rope disc 56 and the pulley 57.

In order to facilitate the installation and fixation of the pressing block, 4 chains 52 are fixedly installed on the pressing block 51; at the gravity center point of the pressing block, the chain 52 is connected with a steel wire rope 53 for pulling the pressing block to move up and down, and the pressing block is hung above the roller way by the steel wire rope 53 through a pulley 57 on a bracket 54. The pressing piece 51 and the chain 52 may be connected in a hinge manner.

In order to control the height of the pressing block, the motor is provided with an encoder for controlling the ascending and descending height of the pressing block.

In order to limit the position of the pressing block, a limit is arranged on the bracket and used for detecting whether the pressing block rises to an upper limit or not.

The installation position of the nose device is very important, and because the modern hot continuous rolling roughing mill is reversible rolling, the installation position of the nose device needs to consider whether the nose of the strip steel can impact the nose device when the second frame of the roughing mill rolls for even passes. Therefore, the installation position of the warping and flattening device is selected as far as possible in the area where the tail of the strip steel reaches after the steel is cast by the second machine frame in the last even pass.

With reference to the flow chart 4, a nose raising method for a rough rolling process of strip steel comprises the following steps:

s1, detecting the height of the warping head of the strip steel by using a warping buckle head detection device, and judging whether the strip steel needs to be leveled or not;

as shown in fig. 1, when the strip steel 3 is rolled by the first rack 1, the head of the strip steel of odd number passes is detected by the buckle head detection device 4 arranged on the edge of the roller way and takes the shape of the head, the image is transmitted to the image processing computer through the data cable, the head shape data of the plate blank is divided by the image processing algorithm and is transmitted to the control algorithm to calculate the buckling direction and the buckling degree, then whether the plate blank needs to be leveled or not is determined according to the buckling degree, and if the height of the buckle head exceeds the height Xmm of the inlet device 7 of the second rack 2, the head pressing program is started;

s2, immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

s3, tracking the head position of the warped strip steel 3, stopping conveying the strip steel in seconds after the roller bed delays X when the photoelectric tube 6 detects that the strip steel arrives, and stopping the strip steel on the roller bed;

s4, starting the nose pressing operation by the nose pressing device, enabling the motor 55 to rotate positively, enabling the rope disc 56 to rotate to enable the steel wire rope 53 and the pressing block 51 to descend, counting by an encoder behind the motor, calculating to stop when the pressing block reaches a set position, and flattening the nose after the pressing block 51 presses the strip steel; the motor 55 rotates in the reverse direction, and the rope reel 56 rotates to raise the wire rope 53 and the pressure piece 51 to the stop position.

S5, starting the roller way to rotate forward, accelerating to X m/S, and sending the strip steel to a second rack for rolling;

and S6, starting the front unit operation of the first frame to continue.

A nose pressing method for the rough rolling process of strip steel further comprises a manual nose pressing operation, and comprises the following steps:

1) if the warping buckle head detection device is not available or fails, an operator judges that the warping head is too high and needs to be pressed down;

2) immediately stopping steel drawing and rolling of the unit in front of the first machine frame, stopping the next operation after the operation is finished, and waiting before and after the machine frame;

3) the operator judges that the head of the warped head strip steel is positioned below the head pressing device, the roller way conveying is manually stopped, and the strip steel is stopped on the roller way;

4) an operator operates the nose pressing device to start nose pressing operation, the motor 55 rotates forwards, the rope disc 56 rotates to enable the steel wire rope 53 and the pressing block 51 to descend, and the nose is pressed and flattened after the pressing block 51 presses the strip steel; then the motor 55 is controlled to rotate reversely, and the rope disc 56 rotates to enable the steel wire rope 53 and the pressing block 51 to ascend to a stop position;

5) starting the roller way to rotate forwards, accelerating to the speed of X meters per second, and sending the strip steel to a second rack for rolling;

6) and starting the front unit of the first frame to continue the operation.