Roller way plate blank centering device and centering method

Abstract

The invention discloses a roller way slab centering device and method, the device comprises a first upper push arm, a second upper push arm, a first center gear, a second center gear, a first lower push arm, a second lower push arm, a first clamping arm and a second clamping arm, the lower end of the upper push arm is connected with an upper rack, and the upper end of the lower push arm is connected with a lower rack; the linear power device drives the upper pushing arm to move, and the first clamping arm and the second clamping arm are pushed to move through meshing of the upper rack, the lower rack and the center gear. One end of the clamping arm rotatably sleeves the pushing arm, the other end of the clamping arm is provided with a sliding groove, and the end part of the pushing arm extends into the sliding groove through a fixedly connected pin shaft and is in sliding connection with the sliding groove in the conveying direction of the roller way. Under the condition that no incoming material information exists, the clamping arms can be controlled to move inwards by the corresponding distance by detecting and calculating the specification information of the plate blank, and accurate centering operation is achieved. And only the space of a single-side roller way is occupied, so that the occupied space is reduced.

Description

Technical Field

[0001] The present invention belongs to the technical field of slab detection, and in particular, relates to a roller slab centering device and a centering method. Background Art

[0002] The rolling mill is a widely used equipment in the metal processing industry. It can roll thick plates into required thin plates. The slab rolling process usually involves the billet first raising its temperature to the required rolling temperature in a heating furnace, then entering the rough rolling descaling machine through a roller to treat the oxidized iron scale produced by the slab, then entering the rough rolling unit to roll the width and thickness of the strip, and then transporting it to the finishing descaling machine through a roller to treat the oxidized iron scale produced on the surface of the strip, and then entering the finishing rolling unit to roll the thickness and width of the strip more precisely. After the surface temperature of the strip is strictly controlled by the roller through layer cooling before coiling, it enters the coiler to become a steel coil, and is finally bundled, sprayed with numbers, and sent to the coil warehouse for storage and packaging. In the process of conveying between the equipment through the roller, the slab must be kept in the center of the roller, that is, the center line of the slab is aligned with the center line of the roller.

[0003] However, the applicant found that currently, passive centering solutions are mostly used, that is, fixed protective plates are set on both sides of the roller, which has the disadvantage that the center line of the slab cannot be adjusted to align with the center line of the roller according to different slab widths. Alternatively, a double-side push rod solution is often used, in which the push rods are pushed by cylinders on both sides of the roller for centering. The disadvantage is that cylinders and push rods and other mechanisms need to be set on both sides of the roller, resulting in a large space on both sides of the roller.

[0004] Therefore, it is necessary to develop a centering structure that can adjust the centering of the slab according to different slab widths and reduce the occupied space. Summary of the invention

[0005] In order to solve the above problems, the present application provides a roller slab centering device, comprising:

[0006] A first push-up arm is connected to the output end of the linear power device, wherein the linear driving direction of the linear power device is horizontal and perpendicular to the center line of the roller table;

[0007] A second upper push arm is connected to the output end of the linear power device and is spaced apart from the first upper push arm along the roller conveying direction;

[0008] The first central gear is fixedly connected to a horizontal first upper rack at the lower end of the first upper push arm, and the first upper rack is meshed with the first central gear.

[0009] The second central gear is fixedly connected to a horizontal second upper rack at the lower end of the second upper push arm, and the second upper rack is meshed with the second central gear.

[0010] A first lower push arm, a first horizontal lower rack is fixedly connected to the upper end of the first lower push arm, and the first lower rack is meshed with the first central gear,

[0011] A second lower push arm, a second horizontal lower rack is fixedly connected to the upper end of the second lower push arm, and the second lower rack is meshed with the second central gear.

[0012] A first clamping arm, one end of which is rotatably mounted on the first upper push arm, and the other end of which is slidably connected to the end of the second upper push arm along the conveying direction of the roller conveyor;

[0013] One end of the second clamping arm can be rotatably sleeved on the first lower push arm, and the other end is slidably connected with the end of the second lower push arm along the conveying direction of the roller.

[0014] Optionally, a pin is fixedly connected to the first upper push arm, one end of the first clamp arm can be rotatably sleeved on the pin, a first sliding groove is provided at the other end of the first clamp arm, an end of the second upper push arm extends into the first sliding groove, a first slider is installed at the end of the second upper push arm, the first slider includes a first sliding plate and a first bolt, an edge of the first sliding plate is placed on the groove top edge of the first sliding groove, and the first bolt fixes the first sliding plate and the second upper push arm, so that the second upper push arm can slide in the first sliding groove along the conveying direction of the roller;

[0015] A pin shaft is fixedly connected to the first push arm, one end of the second clamping arm can be rotatably sleeved on the pin shaft, and a second sliding groove is provided at the other end of the second clamping arm, the end portion of the second push arm extends into the second sliding groove, and a second slider is installed at the end portion of the second push arm, the second slider includes a second sliding plate and a second bolt, the edge of the second sliding plate is resting on the top edge of the second sliding groove, and the second bolt fixes the second sliding plate and the second push arm, so that the second push arm can slide in the second sliding groove along the roller conveying direction.

[0016] Optionally, the second upper push arm has a gap with the first sliding groove in a direction perpendicular to the roller conveying direction, and the second lower push arm has a gap with the second sliding groove in a direction perpendicular to the roller conveying direction.

[0017] Optionally, a wear-resistant sleeve is sleeved on the outer periphery of the end portion of the second upper push arm extending into the first sliding groove, and a wear-resistant sleeve is also sleeved on the outer periphery of the end portion of the second lower push arm extending into the second sliding groove.

[0018] Optionally, it also includes a first base and a second base spaced apart along the roller conveying direction, the linear power device includes a first linear power device and a second linear power device, the first linear power device and a first central gear are installed on the first base, and the second linear power device and a second central gear are installed on the second base.

[0019] Optionally, an upper guide hole with a horizontal axis is provided on the first base, and one end of the first upper push arm is embedded in the upper guide hole; and an upper guide hole with a horizontal axis is provided on the second base, and one end of the second upper push arm is embedded in the upper guide hole;

[0020] A lower guide hole with a horizontal axis is also provided on the first base, and one end of the first lower push arm is embedded in the lower guide hole. A lower guide hole with a horizontal axis is also provided on the second base, and one end of the second lower push arm is embedded in the lower guide hole.

[0021] Optionally, the longitudinal center line of the first base coincides with the center line of an adjacent roller on the roller conveyor; the longitudinal center line of the second base coincides with the center line of an adjacent roller on the roller conveyor.

[0022] Optionally, the first linear power device and the second linear power device push the first upper push arm and the second upper push arm simultaneously and at the same speed.

[0023] Optionally, the roller slab centering device further includes a grating sensor and an encoder for detecting the length of the slab;

[0024] The roller slab centering device also includes a pair of laser rangefinders respectively arranged on both sides of the roller, for detecting the slab width.

[0025] The distance between a pair of laser rangefinders is L. The laser rangefinder measures the distance between the corresponding slab edge n times during the process of the slab passing through n-1 consecutive time intervals Δt. n is a positive integer greater than 1. The horizontal inclination angle of the slab is

[0026]

[0027] The average width of the slab should be:

[0028]

[0029] Where H1=vΔt ， v is the roller running speed;

[0030] L11 to L1n are the distances between the corresponding edges of the slab measured by the laser distance meter on one side;

[0031] L21 to L2n are the distances between the corresponding edges of the slab measured by the laser rangefinder on the other side.

[0032] The present application also provides a roller slab centering method, using the roller slab centering device as described above, and performing the following steps:

[0033] Step S1, using a grating sensor and an encoder to obtain the length of the slab, using a laser rangefinder to obtain the width of the slab, and calculating the center point of the slab according to the length and width of the slab;

[0034] Step S2, determining whether the center point of the slab is on the transverse center line of the clamp arm, if not, the roller conveyor continues to run until the center point of the slab is on the transverse center line of the clamp arm, if so, the roller conveyor stops;

[0035] Step S3, the linear power device drives the first clamping arm and the second clamping arm to move relative to each other to a centering width, where the centering width refers to the distance between the two clamping arms after the centering is completed;

[0036] Step S4, the linear power device drives the first clamping arm and the second clamping arm to move away from each other to an initial position;

[0037] Step S5: The roller conveyor continuously transports the slab to the next process.

[0038] Compared with the prior art, this application has the following beneficial effects:

[0039] (1) The present application can set the movement of the clamping arm according to the size of the slab to be produced, and can be applicable to the centering of slabs of various sizes. Since the first clamping arm and the second clamping arm can be driven simultaneously by a linear power device, the synchronization of the clamping arms in clamping the slab is improved.

[0040] (2) The present application can reduce the footprint of the power device by using the power device on one side of the roller to simultaneously drive the clamping arms on both sides of the roller.

[0041] (3) The present application detects the size of the slab through a laser rangefinder and a grating sensor, and can center the slab based on the detected size. It can automatically determine and execute the centering operation in the absence of incoming material information, that is, in the absence of three-dimensional size information of the slab.

[0042] (4) In the present application, since the other end of the clamp arm is slidably connected to a push arm, the asynchronism difference between the two push arms that causes the two ends of the clamp arm to be unable to move synchronously due to asynchronism in power can be compensated by rotating one end of the clamp arm around a push arm pin shaft and sliding the first slider at the other end in the sliding groove, so that the relative distance between the two push arm pin shafts changes, thereby preventing the first clamp arm from being deformed and preventing the first clamp arm or the second clamp arm from being stuck.

[0043] (5) When the slab moves on the roller conveyor, the moment it contacts the clamping arms may have a certain impact on the clamping arms on both sides. Especially when the slab is in an inclined state, the impact of the slab on the clamping arms on both sides may cause the clamping arms to deform to different widths in the front and back. The present application compensates for this instantaneous impact by sliding the slider in the clamping arm slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a side view of the roller slab centering device described in an embodiment of the present invention.

[0045] Figure 2 It is a top view of the roller slab centering device described in an embodiment of the present invention.

[0046] Figure 3 It is a front view of the roller slab centering device described in an embodiment of the present invention.

[0047] Figure 4 It is a front cross-sectional view of the first clamping arm and the first sliding block according to the embodiment of the present invention.

[0048] Figure 5 It is a side cross-sectional view of the first clamping arm and the first sliding block according to an embodiment of the present invention.

[0049] Figure 6 This is a schematic diagram of slab width calculation according to an embodiment of the present invention.

[0050] Figure 7 The present invention is a flowchart of a roller slab centering method according to an embodiment of the present invention.

[0051] Figure 8 This is a schematic diagram of an embodiment of the present invention in which the midpoint of a slab moves to the transverse centerline of a clamping arm.

[0052] Figure markings: first base 1, second base 11, first linear power device 2, second linear power device 21, first upper push arm 3, first center gear 4, second upper push arm 31, first lower push arm 5, second lower push arm 51, first clamping arm 6, slab 7, roller 8, second clamping arm 9, first upper rack 401, first lower rack 501, first sliding groove 200, first slider 601, first sliding plate 602, first bolt 603, first wear-resistant sleeve 604. DETAILED DESCRIPTION

[0053] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0054] In the description of the embodiments of the present application, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, "connection" can be detachably connected or non-detachably connected; it can be directly connected or indirectly connected through an intermediate medium. Among them, "fixed connection" means that the relative position relationship after connection remains unchanged. "Rotational connection" means that the two parts are connected to each other and can rotate relative to each other after connection. The directional terms mentioned in the embodiments of the present application, such as "upper", "lower", "inner", "outer", etc., are only reference directions of the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application. Among them, the two components are obtained by an integrated molding process. The integrated structure means that in the process of forming one of the two components, the component is connected to the other component, and there is no need to connect the two components together by reprocessing (such as bonding, welding, snap connection, screw connection).

[0055] In the roller slab centering device of this embodiment, the driving structure is only installed on one side of the roller, which can greatly reduce the space occupied by the driving structure. In addition, by driving two clamping arms at the same time on one side, the synchronization of the clamping arms can be improved.

[0056] The roller slab centering device includes a first base 1, a second base 11, a first linear power device 2, a second linear power device 21, a first upper push arm 3, a first center gear 4, a second center gear, a second upper push arm 31, a first lower push arm 5, a second lower push arm 51, a first clamping arm 6 and a second clamping arm 9.

[0057] Please refer to Figure 2 The first base 1 and the second base 11 are fixedly installed on the ground foundation along the conveying direction of the roller conveyor, and the distance between the first base 1 and the second base 11 is close to the average length of the slab. And preferably, the longitudinal center of the first base 1 coincides with the center line of the adjacent roller on the roller conveyor; the longitudinal center of the second base 11 coincides with the center line of the adjacent roller on the roller conveyor.

[0058] A first linear power device 2 is installed on the first base 1. The first linear power device 2 can be a hydraulic cylinder or a gas cylinder. Its linear driving direction is horizontal and perpendicular to the center line of the roller. The output end of the first linear power device 2 is fixedly connected to the first upper push arm 3, and can drive the first upper push arm 3 to move horizontally and linearly. A second linear power device 21 is installed on the second base 11. The second linear power device 21 can also be a hydraulic cylinder or a gas cylinder. The output end of the second linear power device 21 is fixedly connected to the second upper push arm 31, and can drive the second upper push arm 31 to move horizontally and linearly in the same direction as the first upper push arm. The first linear power device 2 and the second linear power device 21 push the first upper push arm 3 and the second upper push arm 31 simultaneously and at the same speed, so that the first clamping arm and the second clamping arm remain in a parallel state.

[0059] An upper guide hole with a horizontal axis is provided on the first base 1. The cross-section of the first upper push arm 3 is consistent with the shape and size of the upper guide hole. One end of the first upper push arm 3 is embedded in the upper guide hole. Driven by the first linear power device 2, the first upper push arm 3 can slide in the upper guide hole while moving horizontally and linearly.

[0060] An upper guide hole with a horizontal axis is provided on the second base 11. The cross-section of the second upper push arm 31 is consistent with the shape and size of the upper guide hole. One end of the second upper push arm 31 is embedded in the upper guide hole. Driven by the second linear power device 21, the second upper push arm 31 can slide in the upper guide hole while moving horizontally and linearly.

[0061] A first central gear 4 is installed on the first base 1 below the first upper push arm 3. The first central gear 4 can rotate around its axis. A first upper rack 401 is fixedly connected to the lower end of the first upper push arm 3. The first upper rack 401 meshes with the first central gear 4. Specifically, the first upper rack 401 and the first central gear have the same module, and the pitch line of the first upper rack 401 is tangent to the pitch circle of the first central gear. During the horizontal movement of the first upper push arm 3, the rack can push the first central gear 4 to rotate. Figure 1 In the embodiment, if the first linear power device 2 is extended, the first upper rack 401 moves to the right, thereby causing the first central gear 4 to rotate clockwise.

[0062] A second central gear (not shown) is mounted on the second base 11 below the second upper push arm 31. The second central gear can rotate around its axis. A second upper rack (not shown) is fixedly connected to the lower end of the second upper push arm 31. The second upper rack meshes with the second central gear. Specifically, the second upper rack and the second central gear have the same module, and the index line of the second upper rack is tangent to the index circle of the second central gear. During the horizontal movement of the second upper push arm 31, the second upper rack can push the second central gear to rotate.

[0063] It should be noted that the present application does not exclude the possibility of using only one linear power device to simultaneously drive the first upper push arm 3 and the second upper push arm 31 to move. For example, only the first linear power device is installed on the first base 1, and the first upper push arm 3 and the second upper push arm 31 are fixedly connected to the output end of the first linear power device.

[0064] A lower guide hole with a horizontal axis is also provided on the first base 1. The cross-section of the first lower push arm 5 is consistent with the shape and size of the lower guide hole. One end of the first lower push arm 5 is embedded in the lower guide hole. Driven by the first linear power device 2, the first upper push arm 3 can slide in the lower guide hole while moving horizontally and linearly.

[0065] Similarly, a lower guide hole with a horizontal axis is provided on the second base 11, and the cross section of the second lower push arm 51 is consistent with the shape and size of the lower guide hole. One end of the second lower push arm 51 is embedded in the lower guide hole. Driven by the first linear power device 2, the second lower push arm 51 can slide in the lower guide hole while moving horizontally and linearly. The first lower push arm and the second lower push arm can pass through the roller table to the other side along the center line of the adjacent rollers.

[0066] In addition, in order to provide good support for the first upper push arm 3, the second upper push arm 31, the first lower push arm 5, and the second lower push arm 51, the first base 1 can include two support seats distributed on both sides of the axis of the first center gear 4, and the second base 11 can include two support seats distributed on both sides of the axis of the second center gear.

[0067] A first lower rack 501 is fixedly connected to the upper end of the first push-down arm 5, and the first lower rack 501 is meshed with the first central gear 4. During the rotation of the first central gear 4, the first lower rack 501 is pushed to move horizontally. A second lower rack is fixedly connected to the upper end of the second push-down arm 51, and the second lower rack is meshed with the second central gear. During the rotation of the second central gear, the second lower rack is pushed to move horizontally. Due to the above transmission relationship, the movement direction of the first lower rack and the second lower rack is opposite to the movement direction of the first upper rack and the second upper rack.

[0068] The ends of the first upper push arm 3 and the second upper push arm 31 are connected to the first clamp arm 6, but the connection methods are different. One end of the first clamp arm 6 is movably sleeved on the first upper push arm 3, for example, a pin is fixedly connected to the first upper push arm 3, and one end of the first clamp arm 6 can be rotatably sleeved on the pin. The other end of the first clamp arm 6 is connected to the end of the second upper push arm 31 by sliding along the conveying direction of the roller.

[0069] A first sliding groove 200 may be provided at the other end of the first clamp arm 6, and a first slider 601 may be installed at the end of the second push-up arm, and the first slider 601 may be slidably installed on the first sliding groove 200. For example, Figure 4 It is a front cross-sectional view of the first slider 601 and the first clamp arm 6. The first clamp arm 6 is provided with a first sliding groove 200. The end of the second upper push arm 31 can extend into the first sliding groove 200 through a fixedly connected pin. The first slider 601 includes a first sliding plate 602 and a first bolt 603. The edge of the first sliding plate 602 is placed on the groove top edge of the first sliding groove 200. The first bolt 603 fixedly connects the first sliding plate 602 with the pin of the second upper push arm 31, so that the second upper push arm 31 can slide in the first sliding groove 200 along the roller conveying direction relative to the first clamp arm 6. Moreover, the second upper push arm 31 has some clearance with the first sliding groove 200 perpendicular to the roller conveying direction, so that the first slider 601 has a certain horizontal rotation freedom, thereby avoiding the occurrence of a stuck situation.

[0070] Similarly, the first push-down arm and the second push-down arm 51 and the second clamp arm 9 also adopt the same connection method, that is, one end of the second clamp arm 9 is movably sleeved on the first push-down arm 5, for example, a pin is fixedly connected to the first push-down arm 5, and one end of the second clamp arm 9 can be rotatably sleeved on the pin. The other end of the second clamp arm 9 and the end of the second push-down arm 51 are connected by sliding along the roller conveying direction. The specific connection method can refer to the connection method between the second upper push arm and the first clamp arm as mentioned above, a second sliding groove is provided at the other end of the second clamp arm, the end of the second push-down arm can extend into the second sliding groove through the fixedly connected pin, and a second slider is installed at the end of the second push-down arm, the second slider includes a second sliding plate and a second bolt, the edge of the second sliding plate is placed on the groove top edge of the second sliding groove, and the second bolt fixes the second sliding plate with the pin of the second push-down arm, so that the second push-down arm can slide relative to the second clamp arm in the second sliding groove along the roller conveying direction.

[0071] Furthermore, to improve wear resistance, a first wear-resistant sleeve 604 may be sleeved on the outer periphery of the end of the second upper push arm 31 to improve its wear resistance. Similarly, a wear-resistant sleeve may also be sleeved on the outer periphery of the end of the second lower push arm 51.

[0072] The first clamp arm 6 and the second clamp arm 9 are parallel to each other in the initial state, and the center line between the first clamp arm 6 and the second clamp arm 9 coincides with the center line of the roller, and the maximum distance between the first clamp arm 6 and the second clamp arm 9 is greater than the width of the slab; the lower surface of the first clamp arm 6 and the second clamp arm 9 is slightly higher than the upper surface of the roller, and the upper surface of the first clamp arm 6 and the second clamp arm 9 is slightly higher than the upper surface of the slab.

[0073] If the two upper push arms are not synchronized due to the power asynchrony, the two ends of the first clamp arm cannot move synchronously. However, since the other end of the first clamp arm is slidably connected to the second upper push arm, the slight asynchronism difference can be compensated by rotating one end of the clamp arm around a push arm pin and sliding the first slider at the other end in the sliding groove, so that the relative distance between the two push arm pins changes, which will not cause the first clamp arm to deform or get stuck. Similarly, the second clamp arm can also be prevented from being deformed or stuck.

[0074] Moreover, when the slab moves on the roller, it may have a certain impact on the clamp arms on both sides when it contacts the clamp arms. Especially when the slab is in an inclined state, the impact of the slab on the clamp arms on both sides may cause the clamp arms to deform to different widths front and back. The present application compensates for and offsets the instantaneous impact by sliding the slider in the sliding groove, thereby preventing the clamp arms from deforming to different widths front and back.

[0075] Furthermore, the roller slab centering device also includes a grating sensor and an encoder for detecting the length of the slab, and the principle is to calculate the length of the slab by using the running time of the slab on the roller installed with the encoder. Scale gratings can be set at the head and tail of the slab, and the grating reading head is installed on the roller, and the grating reading head detects the head of the slab to perform encoder counting, until the grating reading head detects the tail of the slab and the encoder stops counting.

[0076] Furthermore, the roller slab centering device also includes a pair of laser rangefinders for detecting the slab width. Specifically, a pair of laser rangefinders are respectively arranged on both sides of the roller, and respectively detect the distance between their installation positions and the corresponding sides of the slab, so as to determine the slab width. Specifically, the slab will not tilt much during normal operation, mainly with left and right deviations along the center of the roller, and with a certain amount of angular deviation. The following calculation process is to more accurately calculate the slab width, and the measurement error in the length direction has been ignored.

[0077] Assuming that the roller moves at a uniform speed of v, the distance between the laser rangefinders on both sides of the slab is L, the calculation formula corresponding to the n-time intervals measured during the slab passes through n-1 consecutive time intervals Δt, where n is a positive integer greater than 1, and the horizontal inclination angle of the slab is

[0078]

[0079] The average width of the slab should be:

[0080]

[0081] Where H1=vΔt

[0082] L11 to L1n are the distances between the corresponding edges of the slab measured by the laser distance meter on one side;

[0083] L21 to L2n are the distances between the corresponding edges of the slab measured by the laser rangefinder on the other side. The following is the calculation formula corresponding to three measurements of the distances at two consecutive time intervals Δt. The measurement is shown in the figure below. Figure 6 As shown, the horizontal inclination angle of the slab is

[0084]

[0085] The average width of the slab should be:

[0086]

[0087] The present application also provides a roller slab centering method, comprising the following steps:

[0088] Step S1, the incoming slab runs on a roller table, the length of the slab is obtained by using a grating sensor and an encoder, the width of the slab is obtained by using a laser rangefinder, and the center point A of the slab is calculated based on the length and width of the slab.

[0089] Step S2, determine whether the center point A of the slab is on the transverse center line of the clamp arm, which is the line connecting the midpoints of the length direction of the two clamp arms. If not, the roller conveyor continues to run until the center of the slab is on the transverse center line of the clamp arm. If so, the roller conveyor stops. Figure 8 In the left figure, the center point A of the slab is not on the horizontal center line of the clamp arm, so the roller continues to run. The right figure shows that the center point A of the slab is on the horizontal center line of the clamp arm, that is, Figure 8 On the paper, if the center point A of the slab and the center of the length direction of the clamp arm are on the same horizontal line, the roller stops.

[0090] Step S3, the first linear power device and the second linear power device are simultaneously actuated, and the first clamp arm and the second clamp arm are relatively moved to the centering width, thereby completing the centering of the slab. The centering width refers to the distance between the two clamp arms after the centering is completed. The centering width can be the slab width + the allowable deviation. For example, when the slab width is 1050mm, the initial clamp arm distance may be more than 2000, and the clamp arms move to the position where the clamp arm distance is 1100mm to complete the centering.

[0091] It should be noted that after the centering width is reached, there may also be a certain delay so that the first clamping arm and the second clamping arm remain at the position of the centering width.

[0092] Step S4: the first linear power device and the second linear power device are actuated simultaneously, and the first clamping arm and the second clamping arm move away from each other to an initial position.

[0093] Step S5: The roller conveyor continuously transports the slab to the next process.

[0094] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, those skilled in the art may make various corresponding changes and deformations according to the present invention, but these corresponding changes and deformations shall fall within the protection scope of the claims of the present invention.

Claims

1. A roller slab centering device, characterized in that: include: A first push-up arm is connected to the output end of the linear power device, wherein the linear driving direction of the linear power device is horizontal and perpendicular to the center line of the roller table; A second upper push arm is connected to the output end of the linear power device and is spaced apart from the first upper push arm along the roller conveying direction; The first central gear is fixedly connected to a horizontal first upper rack at the lower end of the first upper push arm, and the first upper rack is meshed with the first central gear. The second central gear is fixedly connected to a horizontal second upper rack at the lower end of the second upper push arm, and the second upper rack is meshed with the second central gear. A first lower push arm, a first horizontal lower rack is fixedly connected to the upper end of the first lower push arm, and the first lower rack is meshed with the first central gear, A second lower push arm, a second horizontal lower rack is fixedly connected to the upper end of the second lower push arm, and the second lower rack is meshed with the second central gear. A first clamping arm, one end of which is rotatably mounted on the first upper push arm, and the other end of which is slidably connected to the end of the second upper push arm along the conveying direction of the roller conveyor; One end of the second clamping arm can be rotatably sleeved on the first lower push arm, and the other end is slidably connected with the end of the second lower push arm along the conveying direction of the roller.

2. The roller slab centering device according to claim 1 is characterized in that: A pin shaft is fixedly connected to the first upper push arm, one end of the first clamp arm can be rotatably sleeved on the pin shaft, a first sliding groove is arranged at the other end of the first clamp arm, an end portion of the second upper push arm extends into the first sliding groove, a first slider is installed at the end portion of the second upper push arm, the first slider comprises a first sliding plate and a first bolt, an edge of the first sliding plate is placed on the groove top edge of the first sliding groove, and the first bolt fixes the first sliding plate and the second upper push arm, so that the second upper push arm can slide in the first sliding groove along the conveying direction of the roller conveyor; A pin shaft is fixedly connected to the first push arm, one end of the second clamping arm can be rotatably sleeved on the pin shaft, and a second sliding groove is provided at the other end of the second clamping arm, the end portion of the second push arm extends into the second sliding groove, and a second slider is installed at the end portion of the second push arm, the second slider includes a second sliding plate and a second bolt, the edge of the second sliding plate is resting on the top edge of the second sliding groove, and the second bolt fixes the second sliding plate and the second push arm, so that the second push arm can slide in the second sliding groove along the roller conveying direction.

3. The roller slab centering device according to claim 2 is characterized in that: The second upper push arm has a gap with the first sliding groove in a direction perpendicular to the roller conveying direction, and the second lower push arm has a gap with the second sliding groove in a direction perpendicular to the roller conveying direction.

4. The roller slab centering device according to claim 2, characterized in that: A wear-resistant sleeve is sleeved on the outer periphery of the end portion of the second upper push arm extending into the first sliding groove, and a wear-resistant sleeve is also sleeved on the outer periphery of the end portion of the second lower push arm extending into the second sliding groove.

5. The roller slab centering device according to claim 1, characterized in that: It also includes a first base and a second base spaced apart along the roller conveying direction. The linear power device includes a first linear power device and a second linear power device. The first linear power device and a first central gear are mounted on the first base, and the second linear power device and a second central gear are mounted on the second base.

6. The roller slab centering device according to claim 5, characterized in that: An upper guide hole with a horizontal axis is provided on the first base, and one end of the first upper push arm is embedded in the upper guide hole; an upper guide hole with a horizontal axis is provided on the second base, and one end of the second upper push arm is embedded in the upper guide hole; A lower guide hole with a horizontal axis is also provided on the first base, and one end of the first lower push arm is embedded in the lower guide hole. A lower guide hole with a horizontal axis is also provided on the second base, and one end of the second lower push arm is embedded in the lower guide hole.

7. The roller slab centering device according to claim 5, characterized in that: The longitudinal center line of the first base coincides with the center line of the adjacent roller on the roller conveyor; the longitudinal center line of the second base coincides with the center line of the adjacent roller on the roller conveyor.

8. The roller slab centering device according to claim 5, characterized in that: The first linear power device and the second linear power device push the first upper push arm and the second upper push arm simultaneously and at a constant speed.

9. The roller slab centering device according to claim 1, characterized in that: The roller slab centering device also includes a grating sensor and an encoder for detecting the length of the slab; The roller slab centering device also includes a pair of laser rangefinders respectively arranged on both sides of the roller, for detecting the slab width. The distance between a pair of laser rangefinders is L. The laser rangefinder measures the distance between the corresponding slab edge Δt n times during the slab passing through n-1 consecutive time intervals. n is a positive integer greater than 1. The horizontal inclination angle of the slab is The average width of the slab should be: Where H1=vΔt ， v is the roller running speed; L11 to L1n are the distances between the corresponding edges of the slab measured by the laser distance meter on one side; L21 to L2n are the distances between the corresponding edges of the slab measured by the laser rangefinder on the other side.

10. A roller slab centering method, characterized in that: The roller slab centering device according to any one of claims 1 to 9 is used to perform the following steps: Step S1, using a grating sensor and an encoder to obtain the length of the slab, using a laser rangefinder to obtain the width of the slab, and calculating the center point of the slab according to the length and width of the slab; Step S2, determining whether the center point of the slab is on the transverse center line of the clamp arm, if not, the roller conveyor continues to run until the center point of the slab is on the transverse center line of the clamp arm, if so, the roller conveyor stops; Step S3, the linear power device drives the first clamping arm and the second clamping arm to move relative to each other to a centering width, where the centering width refers to the distance between the two clamping arms after the centering is completed; Step S4, the linear power device drives the first clamping arm and the second clamping arm to move away from each other to an initial position; Step S5: The roller conveyor continuously transports the slab to the next process.

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