Method for improving quality and efficiency and controlling tailing deviation by using rolling mill entrance flattening roller

Abstract

The application provides a method for improving quality and efficiency and controlling tailing deviation of a rolling mill by using a flattening roller at the entrance of the rolling mill, wherein the flattening roller group at the entrance of the rolling mill comprises a fixed roller and one movable upper roller; the upper roller is a flattening roller for pressing the strip, and the pressing position of the upper roller depends on the position of a depth adjusting device platform; the position of the depth adjusting device platform is vertically adjusted by a motor and a transmission device connected to the motor; in the method, an encoder is installed at the motor, and a depth adjusting target value is automatically generated according to the thickness of the strip at the entrance to control the pressing position of the upper roller; and the application can optimize the rolling mill process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of rolling mill process optimization, in particular to a method for improving quality and efficiency and controlling tail slippage of a rolling mill entry flattening roller. BACKGROUND

[0002] The depth adjustment device of the flattening roller group (also known as the tensioning roller group) at the entry of the rolling mill has no positioning sensor or encoder. The depth adjustment is manually operated, and the depth position is visually determined by the operator. This manual operation greatly affects the production efficiency and quality. In order to control the tail slippage of the thicker strip for automobile plate production, it is necessary to improve the production quality and efficiency, and it is necessary to improve the automatic control of the flattening roller group. SUMMARY

[0003] The present application proposes a method for improving quality, efficiency and controlling tail slippage of the flattening roller at the entry of the rolling mill, which can optimize the rolling mill process.

[0004] The present application adopts the following technical solutions.

[0005] The method for improving quality and efficiency and controlling tail slippage of the flattening roller at the entry of the rolling mill, wherein the flattening roller group at the entry of the rolling mill includes a fixed roller and an upper movable roller; the upper roller is a flattening roller for pressing down the strip, and the pressing position of the upper roller depends on the position of the depth adjustment device platform; the position of the depth adjustment device platform is vertically adjusted by the depth adjustment device through a motor and a transmission device connected thereto; in the method, an encoder is installed at the motor, and a depth adjustment target value is automatically generated according to the thickness of the entry strip to control the pressing position of the upper roller.

[0006] The encoder is connected to the rolling mill controller, the rolling mill controller obtains the thickness value of the entry strip, generates a flattening roller depth adjustment given value according to the encoder pulse signal and encoder data, and sets a control component for executing the depth automatic adjustment of the pressing position of the upper roller at the interactive interface of the rolling mill controller. The commands executable by the control component include a command for making the depth adjustment device platform one-key drop to the bottom;

[0007] In the process of the rolling mill controller, in the ideal state, the preset correlation between the thickness of the entry strip and the target value of the depth adjustment of the flattening roller pressing is as follows

[0008]

[0009] When the rolling mill obtains the thickness of the entry strip, the depth target value for adjusting the depth of the flattening roller pressing is automatically generated according to the above table.

[0010] The rolling mill generates a flattening roller depth adjustment given value according to the entry strip thickness, specifically, the depth target value is MD850, the depth adjustment action time pulse width signal is T307; the encoder actual value used to express the current depth actual value R of the flattening roller is DB53.DBX228;

[0011] The control components for performing the depth automatic adjustment of the upper roller position include a depth automatic adjustment button I35.2, and the corresponding is the SR function block S, the automatic lifting command signal M849.1 for controlling the hydraulic motor to lift the depth adjustment device platform, and the automatic lowering command M849.0 for controlling the hydraulic motor to lower the depth adjustment device platform, then:

[0012] When the target value is less than the actual value CMP

[0013] The control components for performing the depth automatic adjustment of the upper roller position further include a tension roller tail lowering to the bottom button I35.3, and the corresponding instruction of the tension roller tail lowering to the bottom button I35.3 is the depth adjustment to the bottom command T308; the actual rolling speed of the rolling mill is DB675.DBD8,

[0014] The strip thickness at the entry of the rolling mill is DB58.DBD34, and the remaining length of the strip tail is DB57.DBD30; when the value of DB675.DBD8 is less than 150, the value of DB58.DBD34 is greater than 2000 mu, and the value of DB57.DBD30 is less than 60 m, the one-key lowering to the bottom command T308 is in an available state within the preset command maintaining activation time;

[0015] When the depth adjustment to the bottom command is executed, the flattening roller is positioned and rotated in the forward direction, the depth adjustment device platform is pressed down, and until the depth adjustment to the bottom position of the depth adjustment device platform is greater than 80 mm, at this time, the depth adjustment of the depth adjustment device platform has reached the bottom position, the flattening roller increases the additional tension on the strip, so as to optimize the guidance of the strip during the strip throwing.

[0016] The motor is a hydraulic motor.

[0017] The interactive interface of the rolling mill controller is a vice-operated control panel of the rolling mill control box; the flattening roller group includes one movable upper roller and two fixed rollers, and the motor adjusts the position of the depth adjustment device platform through a worm and gear.

[0018] The minimum adjustment button and the corresponding button indicating lamp are arranged at the auxiliary control panel of the rolling mill control box, when the thickness of the strip at the rolling mill inlet is greater than 2mm, the speed is less than 100, and the remaining length is less than 50m, the button indicating lamp is lighted, prompting the operator to start the minimum adjustment button, and the depth adjustment base of the tension roller is adjusted to the minimum position, so that the flattening roller of the flattening roller set, i.e. the upper tension roller, is followed down to increase the inlet tension.

[0019] The present application has the following advantages by optimizing the automation of the rolling mill:

[0020] 1. The depth of the pressure is standardized, the probability of human error is reduced, the operation is standardized, and the stability of production is ensured;

[0021] 2. The production efficiency is improved, the depth of the tension roller is increased when the production process is not left with a residual volume, the tail is avoided to be thrown off, the speed of the tail is improved, the speed of the tail is improved from the original 20m / min to 50m / min, the operation automation is realized, the production efficiency is improved, and the tail is not controlled to be thrown off, so that the volume is conveniently put into the overhead warehouse. BRIEF DESCRIPTION OF DRAWINGS

[0022] The present application will be further described in detail below in combination with the drawings and specific embodiments:

[0023] ATTACHMENT Figure 1 In the present application, the installation diagram of the encoder is shown;

[0024] In the figure: 1-encoder; 2-depth adjustment device platform. DETAILED DESCRIPTION

[0025] As shown in the figure, the method for improving the quality and efficiency of the flattening roller at the inlet of the rolling mill and controlling the tail throw is provided, wherein the flattening roller set at the inlet of the rolling mill comprises a fixed roller and an upper movable roller; the upper roller is a flattening roller for pressing down the strip, and the pressing position of the upper roller depends on the position of the depth adjustment device platform; the position of the depth adjustment device platform 2 is vertically adjusted by the depth adjustment device through the motor and the transmission device connected thereto; in the method, the encoder is installed at the motor, and the target value of the depth adjustment is automatically generated according to the thickness of the inlet strip to control the pressing position of the upper roller.

[0026] The encoder 1 is connected with the rolling mill controller, the rolling mill controller obtains the thickness value of the inlet strip, generates the flattening roller depth adjustment given value according to the pulse signal of the encoder and the data of the encoder, and sets the control component for executing the automatic depth adjustment of the pressing position of the upper roller at the interactive interface of the rolling mill controller, the commands executable by the control component include the command for making the depth adjustment device platform to be lowered to the bottom;

[0027] In the rolling mill controller process, the preset correlation between the ideal state of the coil entry thickness and the target value of the flattening roll reduction depth adjustment is as follows

[0028]

[0029] When the rolling mill obtains the entry strip thickness, the depth target value for adjusting the flattening roll reduction depth is automatically generated according to the above table.

[0030] The method for the rolling mill to generate the flattening roll depth adjustment given value according to the entry strip thickness is specifically: the depth target value is MD850, the depth adjustment action time pulse width signal is T307; the encoder actual value for representing the current depth actual value R of the flattening roll is DB53.DBX228;

[0031] The control component for performing the automatic depth adjustment of the upper roll reduction position includes a depth automatic adjustment button I35.2, and the corresponding is an SR function block S. The automatic rising command signal M849.1 for controlling the hydraulic motor to lift the depth adjustment device platform, and the automatic descending command M849.0 for controlling the hydraulic motor to lower the depth adjustment device platform, then:

[0032] When the target value is less than the actual value CMP

[0033] The control component for performing the automatic depth adjustment of the upper roll reduction position further includes a tension roll tail lowering to the bottom button I35.3, and the corresponding instruction of the tension roll tail lowering to the bottom button I35.3 is a depth adjustment to the bottom command T308. The actual rolling speed of the rolling mill is DB675.DBD8,

[0034] The entry strip thickness of the rolling mill is DB58.DBD34, and the remaining length of the strip tail is DB57.DBD30. When the DB675.DBD8 value is less than 150, the DB58.DBD34 value is greater than 2000 mu, and the DB57.DBD30 is less than 60 m, the one-key lowering to the bottom command T308 is in an available state within the preset command holding activation time;

[0035] When the depth adjustment to the bottom command is executed, the flattening roll is positioned in the forward rotation, the depth adjustment device platform is pressed down, and until the depth adjustment to the bottom position of the depth adjustment device platform is greater than 80 mm, at this time, the depth adjustment of the depth adjustment device platform has reached the bottom position, and the flattening roll increases the additional tension on the strip to optimize the guidance of the strip during the strip throwing.

[0036] The motor is a hydraulic motor.

[0037] The interactive interface of the rolling mill controller is a sub-control panel of a rolling mill control box; the flattening roller set comprises one movable upper roller and two fixed rollers, and the motor adjusts the position of the depth adjustment device platform through a worm and gear.

[0038] The sub-control panel of the rolling mill control box is provided with a minimum adjustment button and a button indicating lamp corresponding to the minimum adjustment button; when the thickness of the strip at the inlet of the rolling mill is greater than 2 mm, the speed is less than 100, and the remaining length is less than 50 m, the button indicating lamp is lighted, prompting an operator to start the minimum adjustment button, and the depth adjustment base of the flattening roller set is adjusted to the minimum position, so that the flattening roller, i.e. the upper tension roller, is followed down to increase the inlet tension.

Claims

1. A method for improving the quality and efficiency of the strip and controlling the tailing deviation of the strip by using the entry flattening roller of the rolling mill, characterized in that: The method, the flattening roller set at the entrance of the rolling mill comprises a fixed roller and an active upper roller; the upper roller is a flattening roller for pressing down the strip, and the pressing down position of the upper roller depends on the position of the depth adjusting device platform; the position of the depth adjusting device platform is vertically adjusted by the depth adjusting device through a motor and a transmission device connected to the motor; in the method, an encoder is installed at the motor, and a depth adjustment target value is automatically generated according to the thickness of the strip at the entrance to control the pressing down position of the upper roller; The encoder is connected to the rolling mill controller, the rolling mill controller acquires the thickness value of the strip at the entrance, generates a flattening roller depth adjustment given value according to the pulse signal of the encoder and the data of the encoder, and sets a control component for executing the depth automatic adjustment of the pressing down position of the upper roller at the interactive interface of the rolling mill controller, the commands executable by the control component include a command for making the depth adjusting device platform one-key drop to the bottom; In the process of the rolling mill controller, in the ideal state, the preset correlation between the thickness of the strip at the entrance and the target value of the depth adjustment of the flattening roller pressing down is as follows After the rolling mill acquires the thickness of the strip at the entrance, the depth target value for adjusting the flattening roller pressing down depth is automatically generated according to the table above; The method for the rolling mill to generate a flattening roller depth adjustment given value according to the thickness of the strip at the entrance is as follows: Supposing that the depth target value is MD850, the depth adjustment action time pulse width signal is T307, and the actual value of the encoder for representing the current depth actual value R of the flattening roller is DB53.DBX228; Supposing that the control component for executing the depth automatic adjustment of the pressing down position of the upper roller comprises a depth automatic adjustment button I35.2, the corresponding SR function block S, the automatic up command signal M849.1 for controlling the hydraulic motor to make the depth adjusting device platform rise, and the automatic down command M849.0 for controlling the hydraulic motor to make the depth adjusting device platform drop, then: When the target value is smaller than the actual value CMP Supposing that the control component for executing the depth automatic adjustment of the pressing down position of the upper roller further comprises a strip tail of the tension roller drop to the bottom button I35.3, the instruction corresponding to the strip tail of the tension roller drop to the bottom button I35.3 is the depth adjustment to the bottom command T308, and the actual rolling speed of the rolling mill is DB675.DBD8, Supposing that the thickness of the strip at the entrance of the rolling mill is DB58.DBD34, and the remaining length of the tail of the strip is DB57.DBD30; when the value of DB675.DBD8 is smaller than 150, the value of DB58.DBD34 is greater than 2000 um, and the value of DB57.DBD30 is smaller than 60 m, the one-key drop to the bottom command T308 is in the available state within the preset command holding activation time; When the depth adjustment to the bottom command is executed, the flattening roller positioning positive rotation, the depth adjustment device platform is pressed down until the depth adjustment device platform is greater than 80mm in the depth adjustment to the bottom position, at this time the depth adjustment device platform has reached the bottom position, the flattening roller increases the additional tension on the strip to optimize the strip guiding during the strip throwing.

2. The method of claim 1, wherein the method further comprises: The motor is a hydraulic motor.

3. The method of claim 1, wherein the method further comprises: The interactive interface of the rolling mill controller is a vice-operated control panel of the rolling mill control box; the flattening roller group comprises one movable upper roller and two fixed rollers, and the motor adjusts the position of the depth adjustment device platform through a worm gear.

4. The method of claim 3, wherein the method further comprises: The vice-operated control panel of the rolling mill control box is provided with a minimum adjustment button and a button indicating lamp corresponding thereto, when the strip thickness at the rolling mill inlet is greater than 2mm, the speed is less than 100, and the remaining length is less than 50m, the button indicating lamp is lighted, prompting the operator to start the minimum adjustment button, and the tension roller depth adjustment base is adjusted to the minimum position, so that the flattening roller of the flattening roller group, i.e. the upper tension roller, is followed down to increase the inlet tension.

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