A centering device and centering method for rolling non-ferrous metal plates by a block method process

Abstract

The present application relates to metal rolling technical field, specifically disclose a kind of block formula method process rolling non-ferrous metal plate centering device and centering method, including slide rail, the slide rail is slidably provided with mounting seat, two support rollers are rotatably arranged on mounting seat, slide block is slidably arranged on the side surface of mounting seat, the bottom of slide block is rotatably provided with two symmetrically arranged pressure rollers, driving member for driving pressure roller active rotation is installed on slide block, detection member for detecting the rotation of pressure roller is installed on slide block.The present application adopts dynamic following type structure and active detection correction mechanism, can carry out real-time detection, judge and correct the deviation of plate, realizes the continuous accurate centering of plate center, solves the problem that plate is easy to run deviation, side bending or even out of the roller way in multiple passes reciprocating rolling, also can judge whether the roll is inclined by detecting the difference between the pressure values of the two sides of the slab, it is versatile, easy to use.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metal rolling, in particular to a centering device and method for block process rolling of non-ferrous metal plates. BACKGROUND

[0002] When non-ferrous metal plates are rolled by hot rolling and cold rolling coiling machines, front and rear tension can be formed between the front and rear coiling machines and the rolling mill rolls. Under the action of such tension, the strip EPC (edge position control) system can achieve good centering effect for the plate strip coil, and the production process usually does not have the phenomena of misalignment, deviation, side bending, etc.

[0003] However, the high-temperature alloy plate strip hot rolling and cold rolling, nickel-based precision alloy plate strip hot rolling and cold rolling, copper plate strip hot rolling, titanium alloy plate hot rolling and cold rolling, magnesium alloy plate hot rolling and cold rolling, etc. are difficult to coil, and because of the lack of tension action of the front and rear coiling machines, the plate is in a free state (no front and rear traction tension) during rolling, and is rolled back and forth in multiple passes only under the action of the rolls. Such tension-free rolling conditions make it extremely difficult to center the plate, resulting in a series of quality problems in the production process: 1. Serious deviation and side bending: although the front and rear of the hot rolling mill are equipped with centering devices when the plate blank is thick, the effect is not obvious, and after centering, the plate still deviates and bends to the side during subsequent multiple passes due to roll shape, deformation heat, roll inclination, electrical control, etc. 2. Lack of continuous and effective centering control.

[0004] Patent No. CN202322903477.8 discloses a centering and guiding device for a hot rolling mill for titanium rolling, which is mainly suitable for positioning the strip head before coiling of the hot-rolled titanium strip coil, but lacks real-time detection and correction ability for dynamic deviation during multiple-pass reciprocating rolling. Patent No. CN201420612599.X discloses a strip tension-free coiling centering device, which is mainly suitable for the centering process of the coiling machine and is a static or semi-static width adjustment device, which cannot be applied to the front and rear of the rolling mill and cannot detect and actively correct the dynamic deviation of the plate during rolling.

[0005] In summary, the centering devices in the prior art mainly have the following common defects: 1. They are mainly designed for coiling process or tension rolling and are difficult to effectively apply to the complex working conditions of tension-free block process multiple-pass rolling; 2. They lack real-time online detection capability for plate deviation, and the correction action is lagging. Therefore, the present application provides a centering device and method for block process rolling of non-ferrous metal plates to solve the above problems. SUMMARY

[0006] The technical problems to be solved by the present application are to overcome the existing defects, and provide a block method process rolling non-ferrous metal plate centering device and a centering method.

[0007] To achieve the above object, the present application provides the following technical scheme: a block method process rolling non-ferrous metal plate centering device and a centering method, comprising a slide rail, a mounting seat is slidably arranged on the slide rail, two supporting rollers are rotatably arranged on the mounting seat, a slide block is slidably arranged on the side surface of the mounting seat, two symmetrical pressure rollers are rotatably arranged on the bottom of the slide block, a driving member for driving the pressure rollers to rotate actively is installed on the slide block, a detection member for detecting the rotation of the pressure rollers is installed on the slide block, a telescopic member for driving the slide block to move up and down is arranged on the top of the mounting seat, and a pressure sensor for detecting the upward extrusion force on the upper pressure roller is arranged between the driving member and the slide block.

[0008] As a preferred technical scheme of the present application, a groove is formed in the side surface of the mounting seat corresponding to the upper side of the supporting roller, and a proximity switch for controlling the operation of the telescopic member is arranged in the groove.

[0009] As a preferred technical scheme of the present application, a sliding groove is formed in the side surface of the mounting seat corresponding to the slide block, and the slide block is slidably arranged in the sliding groove.

[0010] As a preferred technical scheme of the present application, the driving member comprises a servo motor installed on the slide block, and the output shaft of the servo motor is connected to one end of the pressure roller through a shaft coupling.

[0011] As a preferred technical scheme of the present application, the detection member comprises an absolute value encoder installed on the end of the slide block away from the servo motor, and the absolute value encoder is connected to the shaft of the pressure roller.

[0012] As a preferred technical scheme of the present application, the telescopic member comprises a hydraulic cylinder installed on the top of the slide block, the telescopic end of the hydraulic cylinder is connected to the slide block, and the pressure sensor is installed on the telescopic end of the hydraulic cylinder.

[0013] A centering method of a block method process rolling non-ferrous metal plate centering device, comprising the following steps:

[0014] S1, two parallel roller conveyors are arranged on both sides of the rolling mill, and a slide rail is arranged in the middle of the two roller conveyors, as shown in Figure 4 ​

[0015] S2, during the slab rolling process, the slab at the outlet side of the rolling mill is inserted between the support roller and the pressure roller; when the end of the slab moves to align with the proximity switch, the proximity switch sends a signal to the external controller, and during the slab rolling process, the slab pushes the mounting seat to move along the slide rail;

[0016] S3, after the external controller receives the signal of the proximity switch, the hydraulic cylinder is controlled to extend, the hydraulic cylinder pushes the sliding block to move downward, so that the pressure roller contacts the upper surface of the slab and exerts a certain positive pressure; at the same time, the external controller controls the servo motor to enter the free mode or the servo closed state, so that the pressure roller can be driven to rotate freely by the friction force of the slab;

[0017] S4, during the slab conveying process, the absolute value encoder detects the absolute angle position of the pressure roller in real time and transmits the signal to the external controller; the external controller calculates the rotation direction and rotation angle of the pressure roller by comparing the angle position values collected continuously twice;

[0018] S5, the external controller compares the calculated rotation angle with the preset deviation threshold; when the rotation angle exceeds the deviation threshold, it is determined that the slab deviates, and the deviation correction step S is executed; if not, continue to convey and detect;

[0019] S6, the external controller first controls the servo motor to switch from the free mode to the position control mode and lock the current position; then controls the hydraulic cylinder to continue to move downward, increases the positive pressure between the pressure roller and the slab; then, the external controller calculates the angle and direction that the servo motor needs to compensate according to the deviation direction and angle detected by the absolute value encoder;

[0020] S7, the external controller controls the servo motor to rotate according to the calculated angle and direction, the servo motor drives the pressure roller to rotate actively, and drives the slab to move by using the friction force between the pressure roller and the slab, so as to correct the deviation of the slab;

[0021] S8, after the deviation correction is completed, the external controller controls the servo motor to enter the free mode again, and adjusts the hydraulic cylinder pressure to the detection value, the system returns to step S4, continues to detect the deviation, and until the slab rolling is completed.

[0022] As a preferred technical scheme of the present application, in S8, when the slab rolling is completed, the external controller controls the hydraulic cylinder to act, so that the pressure roller presses the upper surface of the slab with a set pressure; at the same time, the servo motor is controlled to enter the free mode or the servo closed state; the original push device on the roller conveyor is started to push the slab to move along the width direction at a constant low speed; during the movement of the slab, the external controller records the pressure value detected by the pressure sensor in real time, when a significant and stable difference between the pressure values on both sides of the slab is detected, it is determined that the thickness of the slab is uneven, and then the inclination of the rolling mill is inferred in reverse.

[0023] Compared with the prior art, the present application has the following advantages:

[0024] 1. The block method process rolling non-ferrous metal plate centering device and centering method of the present application can detect the rotation state of the pressure roller in real time through the absolute value encoder, accurately determine the deviation direction and degree of the plate, and drive the pressure roller to actively rotate for correction through the servo motor, so that the detection, determination and correction can be performed in sequence, the response speed is fast, the correction accuracy is high, and the defects of lagging correction and poor effect in the prior art are overcome.

[0025] 2. The block method process rolling non-ferrous metal plate centering device and centering method of the present application can ensure that the center of the plate is always aligned with the center of the roller and the center of the conveying roller through real-time detection, determination and correction, effectively avoids quality problems such as poor plate shape and uneven thickness caused by deviation, and greatly improves the rolling control accuracy and product yield.

[0026] 3. The block method process rolling non-ferrous metal plate centering device and centering method of the present application can determine whether the plate thickness is uniform by detecting the difference between the pressure values on both sides of the plate blank through the pressure sensor, thereby determining whether the roller is tilted, avoiding batch quality problems caused by poor equipment state, and realizing the transition from passive maintenance to predictive maintenance.

[0027] 4. The block method process rolling non-ferrous metal plate centering device and centering method of the present application adopts a dynamic following structure and an active detection correction mechanism, can detect, determine and correct the plate deviation in real time, realizes the continuous and accurate centering of the plate, solves the problems of easy deviation, side bending and even out-of-track of the plate in multiple passes of reciprocating rolling, and can also determine whether the roller is tilted by detecting the difference between the pressure values on both sides of the plate blank, has various functions and is easy to use. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present application;

[0029] Figure 2 It is a left view structural schematic diagram of the present application;

[0030] Figure 3 It is a top view structural schematic diagram of the present application;

[0031] Figure 4 It is a schematic diagram of the present application arranged on a rolling system.

[0032] In the figure: 1 sliding rail, 2 mounting seat, 21 sliding groove, 3 supporting roller, 4 sliding block, 5 pressure roller, 51 servo motor, 6 absolute value encoder, 7 hydraulic cylinder, 8 pressure sensor, 9 proximity switch. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0034] Please refer to Figures 1-4 The present application provides a technical solution: a block method process rolling non-ferrous metal plate centering device and centering method, including slide rail 1, the slide rail 1 is slidably provided with mounting seat 2, the mounting seat 2 is rotatably provided with two support rollers 3, the top height of the support roller 3 is not lower than the top height of the conveyor roller on the conveyor, the side of the mounting seat 2 is slidably provided with a sliding block 4, the bottom of the sliding block 4 is rotatably provided with two symmetrically arranged pressure rollers 5, a driving member for driving the pressure roller 5 to rotate is mounted on the sliding block 4, the driving member is used to drive the pressure roller 5 to rotate, and a detection member for detecting the rotation of the pressure roller 5 is mounted on the sliding block 4, which is used to detect the rotation direction and rotation angle of the pressure roller 5, the top of the mounting seat 2 is provided with a telescopic member for driving the sliding block 4 to move up and down, the telescopic member controls the movement of the sliding block 4, so as to adjust the pressure between the pressure roller 5 and the slab, a pressure sensor 8 is arranged between the driving member and the sliding block 4 for detecting the upward extrusion force of the upper pressure roller, the difference between the pressure values on both sides of the slab can be detected by the pressure sensor 8 to determine whether the thickness of the plate is uniform, so as to determine whether the roller is inclined, thereby avoiding batch quality problems caused by poor equipment state, and realizing the change from passive maintenance to predictive maintenance.

[0035] Further, grooves are formed in the side surfaces of the mounting seat 2 and the upper side of the support roller 3, and proximity switches 9 are arranged in the grooves for controlling the operation of the telescopic member, so as to preliminarily control the operation of the telescopic member, so that the pressure roller 5 contacts the slab and exerts a certain positive pressure on the slab.

[0036] Further, a sliding groove 21 is formed in the side surface of the mounting seat 2 corresponding to the sliding block 4, and the sliding block 4 is slidably arranged in the sliding groove 21, so that the sliding block 4 can slide up and down along the sliding groove 21.

[0037] Further, the driving member includes a servo motor 51 mounted on the sliding block 4, the output shaft of the servo motor 51 is connected to one end of the pressure roller 5 through a shaft coupling, and the servo motor 51 is used to control the rotation of the pressure roller 5. Specifically, the control mode of the servo motor 51 includes position mode, torque mode and free mode.

[0038] Wherein: position mode: the target of servo motor 51 is to reach and keep in the position designated by the controller, any external force trying to force it to rotate will be considered as disturbance, the motor will apply torque in the opposite direction to resist the movement and try to return to the original position.

[0039] Torque mode: the target of servo motor 51 is to output a constant torque, and its position and speed can be free.

[0040] Free mode: the power excitation of servo motor 51 is cut off, and the output shaft is completely free and can be rotated by external force without resistance.

[0041] Further, the detection member includes an absolute value encoder 6 installed at the end of the sliding block 4 away from the servo motor 51, and the absolute value encoder 6 is connected with the shaft of the compression roller 5, the core output of the absolute value encoder 6 is a digital value representing the absolute angular position, and the control system can unambiguously judge the rotation direction by comparing the absolute values sampled twice in succession.

[0042] Further, the telescopic member includes a hydraulic cylinder 7 installed on the top of the sliding block 4, the telescopic end of the hydraulic cylinder 7 is connected with the sliding block 4, and the pressure sensor 8 is installed on the telescopic end of the hydraulic cylinder 7.

[0043] A centering method of a non-ferrous metal plate centering device in a block process, comprising the following steps:

[0044] S1, two parallel roller conveyors are arranged on both sides of the rolling mill, and a slide rail 1 is arranged in the middle of the two roller conveyors;

[0045] S2, during the rolling process of the plate blank, the plate blank at the outlet side of the rolling mill is inserted between the supporting roller 3 and the compression roller 5; when the end of the plate blank moves to align with the proximity switch 9, the proximity switch 9 sends a signal to the external controller, and during the rolling process of the plate blank, the plate blank pushes the mounting seat 2 to move along the slide rail 1;

[0046] S3, after the external controller receives the signal of the proximity switch 9, the hydraulic cylinder 7 is controlled to extend, the hydraulic cylinder 7 pushes the sliding block 4 to move downward, so that the compression roller 5 contacts the upper surface of the plate blank and applies a certain positive pressure; at the same time, the external controller controls the servo motor 51 to enter the free mode or servo-off state, so that the compression roller 5 can be freely rotated by the friction force of the plate blank;

[0047] S4, during the plate blank conveying process, the absolute value encoder 6 detects the absolute angular position of the compression roller 5 in real time and transmits the signal to the external controller; the external controller calculates the rotation direction and rotation angle of the compression roller 5 by comparing the angle position values collected twice in succession.

[0048] S5, the external controller compares the calculated rotation angle with a preset deviation threshold value; when the rotation angle exceeds the deviation threshold value, it is determined that the slab has deviated, and a deviation correction step S6 is performed; if it does not exceed, the conveying and detection continue;

[0049] S6, the external controller first controls the servo motor 51 to switch from the free mode to the position control mode and lock the current position; then controls the hydraulic cylinder 7 to continue to move downward, increasing the normal pressure between the pressure roller 5 and the slab; subsequently, the external controller calculates the angle and direction of the rotation of the servo motor 51 to be compensated according to the deviation direction and angle detected by the absolute value encoder 6;

[0050] S7, the external controller controls the servo motor 51 to rotate according to the calculated angle and direction, the servo motor 51 drives the pressure roller 5 to rotate actively, and drives the slab to move by using the friction between the pressure roller 5 and the slab, thereby performing the deviation correction operation on the slab;

[0051] S8, after the deviation correction is completed, the external controller controls the servo motor 51 to enter the free mode again, and adjusts the pressure of the hydraulic cylinder 7 to the detection value, and the system returns to step S4 to continue the deviation detection until the slab is rolled.

[0052] Further, in S8, when the slab rolling is completed, the external controller controls the hydraulic cylinder 7 to act, so that the pressure roller 5 presses the upper surface of the slab at a set pressure; at the same time, the servo motor 51 is controlled to enter the free mode or the servo closed state; the original setting of the push device on the roller conveyor is started to push the slab to move along the width direction at a constant low speed; during the movement of the slab, the external controller records the pressure value detected by the pressure sensor 8 in real time, and when a significant and stable difference between the pressure values on both sides of the slab is detected, it is determined that the thickness of the plate is uneven, and then the inclination of the roller is inferred in the opposite direction.

[0053] The servo motor 51, the absolute value encoder 6, the pressure sensor 8 and the proximity switch 9 used in the application are all common electrical components in the prior art, and the above-mentioned electrical components are all electrically connected to the external controller, and the structure and working principle of the above-mentioned electrical components are all conventional technical means in the art, which will not be described here.

[0054] The application adopts a dynamic following structure and an active detection deviation correction mechanism, can detect, judge and correct the deviation of the plate in real time, realizes the continuous and accurate centering of the plate, solves the problems of easy deviation, side bending and even out of the roller way of the plate in multi-pass reciprocating rolling, and can also judge whether the roller is inclined by detecting the difference between the pressure values on both sides of the slab, has various functions and is easy to use.

[0055] The undisclosed parts in the present application are all prior arts, and their specific structures, materials and working principles are not described in detail. Although the embodiments of the present application have been shown and described, it is understood to those ordinary skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A method of centering a centering device for rolling non-ferrous sheet material in a block process, characterized in that: The centering device comprises a slide rail (1), a mounting base (2) is arranged on the slide rail (1) and slides, two supporting rollers (3) are arranged on the mounting base (2) and rotate, recesses are formed in the corresponding sides of the mounting base (2) and the upper sides of the supporting rollers (3), and proximity switches (9) for controlling the operation of the telescopic members are arranged in the recesses; A sliding block (4) is arranged on the side of the mounting base (2) and slides up and down, a sliding groove (21) is formed in the corresponding side of the mounting base (2) and the sliding block (4), the sliding block (4) is arranged in the sliding groove (21) and slides, two symmetrical pressing rollers (5) are arranged on the bottom of the sliding block (4) and rotate, a driving member for driving the pressing rollers (5) to rotate is arranged on the sliding block (4), the driving member comprises a servo motor (51) arranged on the sliding block (4), and the output shaft of the servo motor (51) is connected with one end of the pressing roller (5) through a shaft coupling; A detection member for detecting the rotation of the pressing roller (5) is arranged on the sliding block (4), the detection member comprises an absolute value encoder (6) arranged on the end of the sliding block (4) away from the servo motor (51), and the absolute value encoder (6) is connected with the shaft of the pressing roller (5); A telescopic member for driving the sliding block (4) to move up and down is arranged on the top of the mounting base (2), a pressure sensor (8) for detecting the upward extrusion force borne by the upper pressing roller is arranged between the driving member and the sliding block (4), and the telescopic member comprises a hydraulic cylinder (7) arranged on the top of the sliding block (4), the telescopic end of the hydraulic cylinder (7) is connected with the sliding block (4), and the pressure sensor (8) is arranged on the telescopic end of the hydraulic cylinder (7); The centering method of the centering device comprises the following steps: S1, two roller conveyors are arranged on the two sides of the rolling mill and slide, and a slide rail (1) is arranged in the middle of the two roller conveyors; S2, during the rolling process of the plate blank, the plate blank at the outlet side of the rolling mill is inserted between the supporting rollers (3) and the pressing rollers (5); when the end of the plate blank moves to the position aligned with the proximity switch (9), the proximity switch (9) sends a signal to the external controller, and during the rolling process of the plate blank, the plate blank drives the mounting base (2) to move along the slide rail (1); S3, after the external controller receives the signal of the proximity switch (9), the hydraulic cylinder (7) is controlled to extend, the hydraulic cylinder (7) drives the sliding block (4) to move downward, the pressing roller (5) is in contact with the upper surface of the plate blank and exerts a certain positive pressure; at the same time, the external controller controls the servo motor (51) to enter the free mode or the servo closed state, so that the pressing roller (5) can be driven to rotate freely by the friction force of the plate blank; S4, during the conveying process of the plate blank, the absolute value encoder (6) detects the absolute angular position of the pressing roller (5) in real time and transmits the signal to the external controller; the external controller compares the angular position values collected continuously twice to calculate the rotation direction and rotation angle of the pressing roller (5); S5, the external controller compares the calculated rotation angle with the preset deviation threshold value; when the rotation angle exceeds the deviation threshold value, it is determined that the plate blank deviates, and the deviation correction step S6 is performed; if it does not exceed, the conveying and detection continue. S6, the external controller first controls the servo motor (51) to switch from the free mode to the position control mode and lock the current position; then controls the hydraulic cylinder (7) to continue to move downward, increasing the normal pressure between the press roll (5) and the slab; then, the external controller calculates the angle and direction of the servo motor (51) that needs to be compensated according to the deviation direction and angle detected by the absolute value encoder (6); S7, the external controller controls the servo motor (51) to rotate according to the calculated angle and direction, the servo motor (51) drives the press roll (5) to rotate actively, and the friction between the press roll (5) and the slab drives the slab to move, so as to correct the deviation of the slab; S8, after the deviation correction is completed, the external controller controls the servo motor (51) to enter the free mode again, and adjusts the pressure of the hydraulic cylinder (7) to the detected value, the system returns to step S4, and the deviation detection continues until the slab rolling is completed.

2. The method of centering a block process plate centering device for rolling non-ferrous metal sheet material according to claim 1, wherein: In S8, when the slab rolling is completed, the external controller controls the hydraulic cylinder (7) to act, so that the press roll (5) presses the upper surface of the slab with a set pressure; at the same time, the servo motor (51) is controlled to enter the free mode or the servo closed state; the original setting of the push device on the roller conveyor is started, so as to push the slab to move along the width direction at a constant low speed; in the process of moving the slab, the external controller records the pressure value detected by the pressure sensor (8) in real time, when a significant and stable difference between the pressure values on both sides of the slab is detected, it can be judged that the thickness of the slab is uneven, and then the inclination of the roll is inferred reversely.

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