Steel plate rotating device for angular rolling of medium-thickness plate and using method of steel plate rotating device

Abstract

The invention relates to the technical field of rolling, in particular to a steel plate rotating device for angular rolling of a medium-thickness plate and a using method of the steel plate rotating device, and high-precision angular rotation of a steel plate is achieved through the linkage design of a longitudinal lead screw transmission module and a transverse lead screw transmission module in combination with a cam-spring reset structure of a hydraulic push rod assembly and feedback of an angle sensor. The device is simplified in structure, high in adaptability and capable of remarkably improving the rolling efficiency and the plate shape quality.

Description

Technical Field

[0001] The present invention relates to the technical field of rolling, and specifically to a steel plate rotating device for angle rolling of medium and heavy plates and its usage method. Background Art

[0002] At present, the rolling process of medium and heavy plates is divided into three stages: forming, broadening, and elongation. The cross-rolling + longitudinal-rolling technology is the main technology for medium and heavy plate rolling at present. The defect of this technology is that the slab needs to be rotated by 90° between the stages of the medium and heavy plate rolling process, and the production efficiency is limited. At the same time, limited by the maximum rolling width, when the slab length is greater than the maximum rolling width of the rolling mill, cross-rolling broadening cannot be achieved. The angle rolling technology of medium and heavy plates is different from the cross-rolling + longitudinal-rolling technology. By rotating the slab, the rolled piece is rolled at a certain angle with the rolling center line, and this angle is generally 15 - 45°, so as to achieve multi-directional deformation, improve the plate shape quality, increase the rolling efficiency, and expand the product specification range. The existing angle rolling technology has the following problems:

[0003] (1) It relies on the position of the side guide plate for positioning, with relatively low position accuracy, unable to achieve precise turning of the blank at a small angle. At the same time, limited by the length of the side guide plate, the slab length is restricted, affecting the production efficiency.

[0004] (2) Most existing devices are provided with multiple groups of hydraulic push rods on both sides of the roller table. The pushing amounts of each push rod are different, the positions are fixed, and the structure is complex. Summary of the Invention

[0005] The present invention provides a steel plate rotating device for angle rolling of medium and heavy plates and its usage method, with relatively high steel plate rotation accuracy, simple structure, and capable of solving the problem of limited blank length.

[0006] According to one aspect of the present invention, the following technical solution is provided:

[0007] A steel plate rotating device for angle rolling of medium and heavy plates, comprising:

[0008] Two longitudinally arranged screw drive modules symmetrically arranged, parallel to the rolling direction; each longitudinally arranged screw drive module includes an asynchronous motor, a screw, and a convex-shaped sliding guide rail;

[0009] Two transversely arranged screw drive modules arranged in parallel, perpendicular to the rolling direction; each transversely arranged screw drive module includes an asynchronous motor, a screw, a concave track, a hydraulic push rod assembly, and a sliding guide rod;

[0010] The transversely arranged screw drive module is connected to the convex-shaped sliding guide rail of the longitudinally arranged screw drive module through the concave track; the hydraulic push rod assembly includes an angle sensor and a cam-spring reset structure for real-time monitoring and controlling the rotation angle of the steel plate.

[0011] As a preferred embodiment of the steel plate rotating device for medium and heavy plate angle rolling according to the present invention, the longitudinal lead screw drive module includes an asynchronous motor, a coupling, a laser distance sensor, a nut assembly, a lead screw, two convex-shaped sliding guide rails, two lead screw bearing seats, and two rolling bearings. Among them, the asynchronous motor and the lead screw bearing seat are fixed to the ground by anchor bolts. The rolling bearings are installed at both ends of the lead screw and assembled in the lead screw bearing seats. The lead screw is connected to the asynchronous motor through the coupling, and the asynchronous motor drives the lead screw to rotate. The lead screw and the nut assembly form a screw pair, and the rotation of the lead screw drives the nut assembly to move longitudinally. The two convex-shaped sliding guide rails are symmetrically arranged about the central axis of the lead screw and fixed to the ground by bolts. The distance between the two convex-shaped sliding guide rails is less than the roll body length of the front roll table, and its length is greater than the length of the steel plate. The laser distance sensor is fixed to the end of the convex-shaped sliding guide rail.

[0012] As a preferred embodiment of the steel plate rotating device for medium and heavy plate angle rolling according to the present invention, the transverse lead screw drive module includes an asynchronous motor, a coupling, laser distance sensor A, laser distance sensor B, a hydraulic push rod assembly, a lead screw, two sliding guide rods, a base, two rolling bearings, two lead screw bearing seats, slide rod base a, slide rod base b, and a concave track. Among them, the asynchronous motor and the lead screw bearing seat are fixed to the base by bolts. Two concave tracks are welded under the base. The rolling bearings are installed at both ends of the lead screw and assembled in lead screw bearing seat B. The asynchronous motor is connected to the lead screw through the coupling, and the asynchronous motor drives the lead screw to rotate. The two sliding guide rods are respectively fixed to the base through slide rod base a and slide rod base b and are symmetrically arranged on both sides of the lead screw.

[0013] As a preferred embodiment of the steel plate rotating device for medium and heavy plate angle rolling according to the present invention, the hydraulic push rod assembly is composed of a push rod base, a hydraulic cylinder, and a piston rod assembly. A threaded hole and two through holes are provided under the push rod base. The lead screw and the threaded hole cooperate to form a screw pair, and the sliding guide rod passes through the through hole to form a sliding pair. The rotation of the lead screw drives the hydraulic push rod assembly to move horizontally. Laser distance sensor A is fixed on slide rod base a or slide rod base b, and laser distance sensor B is fixed at the end of the hydraulic cylinder.

[0014] As a preferred embodiment of the steel plate rotating device for medium and heavy plate angle rolling according to the present invention, the concave track under the base in the transverse lead screw drive module is installed on the convex-shaped sliding guide rail in the longitudinal lead screw drive module to form a sliding pair; and the base in the transverse lead screw drive module is connected to the longitudinal lead screw drive module by bolts.

[0015] As a preferred embodiment of the steel plate rotating device for angle rolling of medium and heavy plates according to the present invention, the piston rod assembly is composed of a piston rod, a spring, a sliding block, a rotating block, an axial positioning nut, and an angle sensor. A tabletop is provided at the upper end of the piston rod, and a hole is drilled on the tabletop for connecting with the spring. There is a milled surface on the piston rod for cooperating with the sliding block to restrict the circumferential rotation of the sliding block. The inner parts of the sliding block and the rotating block are columnar cam members, and the two are relatively joined. The axial positioning nut is connected to the end of the piston rod assembly to restrict the axial movement of the rotating block. The upper end surface of the rotating block is used for installing the angle sensor.

[0016] As a preferred embodiment of the steel plate rotating device for angle rolling of medium and heavy plates according to the present invention, during the operation of rotating the steel plate, the two hydraulic push rod assemblies are arranged diagonally. The two hydraulic push rod assemblies apply a moment to the steel plate to make the steel plate rotate. Taking the example of rotating the steel plate counterclockwise, the rotating block at the end of the hydraulic push rod assembly rotates synchronously with the steel plate, and the side end surface of the rotating block always contacts the edge of the steel plate. The sliding block presses down, and the spring is compressed under force. After the steel plate rotation ends, the rotating block leaves the steel plate, and the spring rebounds to push the sliding block upward. Due to the cam structure inside the sliding block and the rotating block, the rotating block realizes automatic reset.

[0017] According to another aspect of the present invention, the present invention provides the following technical solution:

[0018] A method for angle rolling of medium and heavy plates, using the above-mentioned steel plate rotating device for angle rolling of medium and heavy plates, includes the following steps:

[0019] S1. Preset distance calculation: Determine the distance between the two transverse lead screw drive modules according to the length of the steel plate and the roller table parameters;

[0020] S2. Lifting of the hydraulic push rod assembly: Control the lifting height of the hydraulic push rod assembly through the laser distance measuring sensor B;

[0021] S3. Positioning of the hydraulic push rod assembly: The transverse lead screw drive module drives the hydraulic push rod assembly to contact the side of the steel plate to form a diagonal thrust;

[0022] S4. Execution of steel plate rotation: The two transverse lead screw drive modules move synchronously in the reverse direction, and in combination with the feedback of the angle sensor, drive the steel plate to rotate to the target angle;

[0023] S5. Reset and rolling: The hydraulic push rod assembly descends to reset, and the steel plate enters the rolling mill for rolling.

[0024] The beneficial effects of the present invention are as follows:

[0025] The present invention provides a steel plate rotating device for angle rolling of medium and heavy plates and its usage method. Through the linkage design of the longitudinal lead screw drive module and the transverse lead screw drive module, combined with the cam-spring reset structure of the hydraulic push rod assembly and the feedback of the angle sensor, high-precision angle rotation of the steel plate is achieved. The device has a simplified structure and strong adaptability, and can significantly improve the rolling efficiency and plate shape quality. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0027] Figure 1 It is a schematic diagram of the overall structure of the steel plate rotating device for angle rolling of medium and heavy plates;

[0028] Figure 2 It is a schematic diagram of the structure of a single longitudinal lead screw drive module;

[0029] Figure 3 It is a schematic diagram of the connection between the nut assembly and the lead screw;

[0030] Figure 4 It is a schematic diagram of the structure of a single transverse lead screw drive module;

[0031] Figure 5 It is a schematic diagram of the connection between the hydraulic push rod assembly, the lead screw and the sliding guide rod;

[0032] Figure 6 It is a schematic diagram of the connection between the transverse lead screw drive module and the sliding track;

[0033] Figure 7 It is a schematic diagram of the connection between the base of the transverse lead screw drive module and the nut assembly;

[0034] Figure 8 It is a schematic diagram of the piston rod assembly structure of the hydraulic push rod assembly;

[0035] Figure 9 It is a partial cross-sectional view of the internal structure of the rotating block and the sliding body;

[0036] Figure 10 It is a working schematic diagram of the piston rod assembly of the hydraulic push rod assembly when rotating the steel;

[0037] Figure 11 It is a flow chart of the angle rolling method for medium and heavy plates.

[0038] Explanation of the reference numerals in the drawings:

[0039] 1 - First longitudinal lead screw drive module, 11 - First asynchronous motor, 12 - First coupling, 13 - First laser distance sensor, 14 - First nut assembly, 15 - First lead screw, 16 - First convex-shaped sliding guide rail A, - First convex-shaped sliding guide rail B, 17 - First lead screw bearing block A, - First lead screw bearing block B, 18 - First rolling bearing A, - First rolling bearing B;

[0040] 2 - Second longitudinal lead screw drive module, 25 - Second lead screw, 26 - Second convex-shaped sliding guide rail A, - Second convex-shaped sliding guide rail B;

[0041] 3 - First transverse lead screw drive module, 31 - Third asynchronous motor, 32 - Third coupling, 33 - Third laser distance sensor A, 34 - Third laser distance sensor B, 35 - Third hydraulic push rod assembly, 36 Third lead screw, 37 - Third sliding guide rod A, - Third sliding guide rod B, 38 - Third base, 39 - Third rolling bearing A, - Third rolling bearing B, 310 - Third lead screw bearing block A, - Third lead screw bearing block B, 311 - Third slide rod base aA, - Third slide rod base aB, 312 - Third slide rod base bA, - Third slide rod base bB, 313 - Third concave track A, - Third concave track B, 351 - Third push rod base, 352 - Third hydraulic cylinder, 353 - Third piston rod assembly, 353-1 - Third piston rod, 353-2 - Third spring, 353-3 - Third sliding block, 353-4 - Third rotating block, 353-5 - Third axial positioning nut, 353-6 - Third angle sensor, 353-11 - Third tabletop, 353-12 - Third milled surface, 353-13 - Third hole;

[0042] 4 - Second transverse lead screw drive module, 453-4 - Fourth rotating block, 46 - Fourth lead screw.

[0043] The realization, functional features and advantages of the object of the present invention will be further described with reference to the embodiments and the accompanying drawings. Detailed implementation manners

[0044] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0045] A steel plate rotating device for angle rolling of medium and heavy plates is composed of two longitudinal (parallel to the rolling direction) lead screw drive modules (the first longitudinal lead screw drive module 1 and the second longitudinal lead screw drive module 2), and two transverse (perpendicular to the rolling direction) lead screw drive modules (the first transverse lead screw drive module 3 and the second transverse lead screw drive module 4), as Figure 1 shown, and is fixed on the ground under the front conveying roller table.

[0046] Two longitudinally (parallel to the rolling direction) lead screw drive modules with the same structure (the first longitudinal lead screw drive module 1 and the second longitudinal lead screw drive module 2) are symmetrically arranged. The structure of the first longitudinal lead screw drive module 1 is as Figure 2 shown, and it is composed of a first asynchronous motor 11, a first coupling 12, a first laser distance sensor 13, a first nut assembly 14, a first lead screw 15, two first convex-shaped sliding guide rails (the first convex-shaped sliding guide rail A 16 and the first convex-shaped sliding guide rail B ), two first lead screw bearing seats (the first lead screw bearing seat A 17 and the first lead screw bearing seat B ), and two first rolling bearings (the first rolling bearing A 18 and the first rolling bearing B ). The second longitudinal lead screw drive module 2 is also composed of a second asynchronous motor, a second coupling, a second laser distance sensor, a second nut assembly, a second lead screw 25, two second convex-shaped sliding guide rails (the second convex-shaped sliding guide rail A 26 and the second convex-shaped sliding guide rail B ), two second lead screw bearing seats, and two second rolling bearings.

[0047] Among them, the first asynchronous motor 11 and the first lead screw bearing seats (the first lead screw bearing seat A 17 and the first lead screw bearing seat B ) are fixed to the ground by anchor bolts. The first rolling bearings (the first rolling bearing A 18 and the first rolling bearing B ) are installed at both ends of the first lead screw 15 and are assembled in the first lead screw bearing seats (the first lead screw bearing seat A 17 and the first lead screw bearing seat B ). The first lead screw 15 and the first asynchronous motor 11 are connected by the first coupling 12, and the first asynchronous motor 11 drives the first lead screw 15 to rotate. The first lead screw 15 and the first nut assembly 14 form a thread pair, and the rotation of the first lead screw 15 can drive the first nut assembly 14 to move longitudinally, asFigure 3 As shown. Two first convex-shaped sliding guide rails (first convex-shaped sliding guide rail A16 and first convex-shaped sliding guide rail B ) are symmetrically arranged about the central axis of the first lead screw 15 and fixed to the ground by bolts. The distance between the first convex-shaped sliding guide rail A16 and the first convex-shaped sliding guide rail B is less than the roll body length of the front roll table, and its length is greater than the length of the steel plate. The first laser distance sensor 13 is fixed to the end of the first convex-shaped sliding guide rail A16.

[0048] Among them, the distance between the two first convex-shaped sliding guide rails (first convex-shaped sliding guide rail A16 and first convex-shaped sliding guide rail B ) in the first longitudinal lead screw drive module 1 is determined by the roll body length of the front roll table and is generally taken as .

[0049] Two identical transverse (perpendicular to the rolling direction) lead screw drive modules (first transverse lead screw drive module 3 and second transverse lead screw drive module 4) are arranged in parallel. The structure of the first transverse lead screw drive module 3 is as Figure 4 shown, and it consists of a third asynchronous motor 31, a third coupling 32, third laser distance sensor A33, third laser distance sensor B34, a third hydraulic push rod assembly 35, a third lead screw 36, two third sliding guide rods (third sliding guide rod A37 and third sliding guide rod B ), a third base 38, two third rolling bearings (third rolling bearing A39 and third rolling bearing B ), two third lead screw bearing seats (third lead screw bearing seat A310 and third lead screw bearing seat B ), two third slide bar bases a (third slide bar base aA311 and third slide bar base aB ), two third slide bar bases b (third slide bar base bA312 and third slide bar base bB ), and two third concave tracks (third concave track A313 and third concave track B ). The second transverse lead screw drive module 4 consists of a fourth asynchronous motor, a fourth coupling, fourth laser distance sensor A, fourth laser distance sensor B, a fourth hydraulic push rod assembly, a fourth lead screw 46, two fourth sliding guide rods, a fourth base, two fourth rolling bearings, two fourth lead screw bearing seats, two fourth slide bar bases a, two fourth slide bar bases b, and two fourth concave tracks.

[0050] Among them, the third asynchronous motor 31 is connected to the two third lead screw bearing seats (third lead screw bearing seat A310 and third lead screw bearing seat B )(It is) fixed to the third base 38 by bolts, and two third concave tracks (third concave track A313 and third concave track B) are welded below the third base 38 ), and two third rolling bearings (third rolling bearing A39 and third rolling bearing B) are installed at both ends of the third lead screw 36 and assembled in two third lead screw bearing seats (third lead screw bearing seat A310 and third lead screw bearing seat B) ), the third asynchronous motor 31 is connected to the third lead screw 36 through the third coupling 32, and the third asynchronous motor 31 drives the third lead screw 36 to rotate. Two third sliding guide rods (third sliding guide rod A37 and third sliding guide rod B) ) are respectively fixed to the third base 38 through two third slide bar bases a (third slide bar base aA311 and third slide bar base aB) and two third slide bar bases b (third slide bar base bA312 and third slide bar base bB) ), and are symmetrically arranged on both sides of the third lead screw 36. The third hydraulic push rod assembly 35 is composed of a third push rod base 351, a third hydraulic cylinder 352, and a third piston rod assembly 353. As shown in ), there is a threaded hole and two through holes below the third push rod base 351. The third lead screw 36 and the threaded hole cooperate to form a thread pair. The third sliding guide rods (third sliding guide rod A37 and third sliding guide rod B) Figure 5 pass through the through holes to form a sliding pair. The rotation of the third lead screw 36 can drive the third hydraulic push rod assembly 35 to move horizontally. The third laser distance sensor A33 is fixed on the third slide bar base bA312, and the third laser distance sensor B34 is fixed at the end of the hydraulic cylinder 352 .

[0051] Install the two concave tracks (third concave track A313 and third concave track B) below the third base 38 in the first transverse lead screw drive module 3 onto the two first convex-shaped sliding guide rails (first convex-shaped sliding guide rail A16 and first convex-shaped sliding guide rail B) in the first longitudinal lead screw drive module 1 to form a sliding pair; and connect the third base 38 in the first transverse lead screw drive module 3 to the first nut assembly 14 of the first longitudinal lead screw drive module 1 by bolts, as shown in and Figure 6 and Figure 7 shown

[0052] In order to monitor the rotation angle in real time during the rotation of the steel plate, a special structural design is made for the third piston rod assembly 353 of the third hydraulic push rod assembly 35. The third piston rod assembly 353 is composed of a third piston rod 353-1, a third spring 353-2, a third sliding block 353-3, a third rotating block 353-4, a third axial positioning nut 353-5, and a third angle sensor 353-6, as shown in Figure 8 . A third table surface 353-11 is provided at the upper end of the third piston rod 353-1, and a third hole 353-13 is drilled on the third table surface 353-11 for connecting with the third spring 353-2. There is a third milled surface 353-12 on the third piston rod 353-1 for cooperating with the third sliding block 353-3 to restrict the circumferential rotation of the third sliding block 353-3. The third sliding block 353-3 and the third rotating block 353-4 are internally columnar cam members, and the internal structure of the third rotating block 353-4 is as shown in Figure 9 . The two are relatively joined. The third axial positioning nut 353-5 is connected to the end of the third piston rod assembly 353 to restrict the axial movement of the third rotating block 353-4. The upper end surface of the third rotating block 353-4 is used to install the third angle sensor 353-6. Similarly, a special structural design is also made for the fourth piston rod assembly of the fourth hydraulic push rod assembly of the second horizontal lead screw drive module 4. The fourth piston rod assembly is composed of a fourth piston rod, a fourth spring, a fourth sliding block, a fourth rotating block 453-4, a fourth axial positioning nut, and a fourth angle sensor.

[0053] When the operation of rotating the steel is required, the two hydraulic push rod assemblies (i.e., the third hydraulic push rod assembly 35 of the first horizontal lead screw drive module 3 and the fourth hydraulic push rod assembly of the second horizontal lead screw drive module 4) are arranged diagonally. The two hydraulic push rod assemblies apply a torque to the steel plate to make the steel plate rotate. Taking the counterclockwise rotation of the steel as an example, the specific working process of the third hydraulic push rod assembly 35 is as shown in Figure 10 . The third rotating block 353-4 at the end of the third hydraulic push rod assembly 35 rotates synchronously with the steel plate. The side end surface of the third rotating block 353-4 is always in contact with the edge of the steel plate. The third sliding block 353-3 is pressed down, and the third spring 353-2 is compressed under force. After the rotation of the steel is completed, the third rotating block 353-4 leaves the steel plate, and the third spring 353-2 rebounds to push the third sliding block 353-3 to move upward. Due to the cam structure inside the third sliding block 353-3 and the third rotating block 353-4, the third rotating block 353-4 realizes automatic reset.

[0054] Assume that the thickness, width, and length of the medium-thick plate before rolling are , and , the roll body diameter and roll body length of the front-stand roller table are and , and the distance between the two rollers is According to the rolling process requirements, the steel plate needs to rotate clockwise (or counterclockwise) in front of the machine degrees. The specific implementation process of the steel plate rotating device for angle rolling of medium and heavy plates is as follows Figure 11 :

[0055] Step S1, center the steel plate and calculate the preset distance X between the two transverse lead screw drive modules (the first transverse lead screw drive module 3 and the second transverse lead screw drive module 4). Transport the steel plate to in front of the machine and stop at the designated position, and use the steel plate centering device of the original production line to center the steel plate to the longitudinal center of the front roller table.

[0056] The preset distance X is determined by the steel plate length L, the width diameter d of the conveying roller, and the distance b between the roller tables:

[0057]

[0058] Among them:

[0059] : The preset distance X between the two transverse lead screw drive modules, unit m;

[0060] : The steel plate length, unit m;

[0061] : The roll body diameter, unit m;

[0062] : The distance between the two rollers, unit m;

[0063] Taking the first longitudinal lead screw drive module 1 and the first transverse lead screw drive module 3 as an example, start the first asynchronous motor 11 in the first longitudinal lead screw drive module 1 to drive the first lead screw 15 to rotate. Through the threaded cooperation between the first lead screw 15 and the first nut assembly 14, drive the first transverse lead screw drive module 3 to move from the initial position to the right rear of the front roller table; similarly, the second longitudinal lead screw drive module 2 drives the second transverse lead screw drive module 4 to move from the initial position to the left front of the front roller table. When the distance between the two transverse lead screw drive modules (the first transverse lead screw drive module 3 and the second transverse lead screw drive module 4) reaches the preset distance X, turn off the motors of the two longitudinal lead screw drive modules.

[0064] Step S2, lift the rod part of the hydraulic push rod. Taking the first transverse lead screw drive module 3 as an example, the third piston rod group 353 in the third hydraulic push rod assembly 35 rises under the push of the third hydraulic cylinder 352. When the third laser distance sensor B34 detects that the rising distance of the third rotating block 353-4 is h1, the third hydraulic cylinder 352 stops working. Similarly, the rotating block in the second transverse lead screw drive module 4 also rises to the same height.

[0065]

[0066] Wherein:

[0067] : The distance from the conveying roller surface to the ground, unit: m;

[0068] : The distance from the lower end face of the rotating block to the ground in the initial state, unit: m;

[0069] : The rising distance of the piston rod, unit: m;

[0070] Step S3, according to the rolling process requirements, the steel plate needs to be rotated clockwise (or counterclockwise) in front of the machine, and move the hydraulic push rod assemblies of the two transverse lead screw drive modules to 、 (or 、 ).

[0071] Taking the first transverse lead screw drive module 3 as an example, start the third asynchronous motor 31 in the first transverse lead screw drive module 3 to drive the third lead screw 36 to rotate. Through the threaded fit between the third lead screw 36 and the third hydraulic push rod assembly 35, drive the third hydraulic push rod assembly 35 to move from the initial position to the side of the steel plate, so that the side end face of the third rotating block 353-4 contacts the side end face of the steel plate, and the third hydraulic cylinder 352 stops working. Similarly, the rotating block in the second transverse lead screw drive module 4 also moves to contact the side end face of the other side of the steel plate.

[0072] During this process, the lateral movement distance of the third hydraulic push rod assembly 35 is:

[0073]

[0074] In the formula:

[0075] : The distance between the initial position of the unilateral hydraulic push rod and the edge of the steel plate after centering, unit: m;

[0076] : The working length of the transverse lead screw drive module, unit: m;

[0077] : The width of the steel plate, unit: m;

[0078] Step S4, rotate the steel plate. Start the asynchronous motors in the two transverse lead screw drive modules. The asynchronous motors have the same speed and opposite rotation directions. The third rotating block 353-4 in the first transverse lead screw drive module 3 moves to the left, and the fourth rotating block 453-4 in the second transverse lead screw drive module 4 moves to the right. When they both contact the steel plate, they continue to move horizontally at the same speed, giving the steel plate a torque to push the steel plate to start rotating. The angle sensor on the upper end face of the rotating block measures the rotation angle of the steel plate in real time. When the angle detected by the angle sensor reaches the angle required by the process , the motors stop working.

[0079] During this process, the horizontal movement distance of the third hydraulic push rod assembly 35 is:

[0080]

[0081] In the formula:

[0082] : The movement distance of the unilateral hydraulic push rod to push the steel plate to the target rotation angle, unit: m;

[0083] : The target billet rotation angle, unit: degree;

[0084] Step S5, lower the rod part of the hydraulic push rod. The hydraulic push rod assemblies of the two transverse lead screw drive modules retract downward to the initial height under the action of the hydraulic cylinders. Roll the steel plate. Use the front roller table to carry the steel plate into the rolling mill for rolling.

[0085] Embodiment

[0086] The known steel plate dimensions, target steel rotation angle, and equipment parameters are as follows:

[0087] Plate length 6m, plate width 1.5m, plate thickness 0.15m;

[0088] Target rotation angle of the angle-rolled billet 20°;

[0089] Diameter of the conveying roller table roller 0.45m, roller gap length 0.46m, roller length 3m;

[0090] Working length of the transverse lead screw drive module 2.8m;

[0091] The calculation results are as follows:

[0092]

[0093]

[0094]

[0095] The preset distance between two transverse lead screw drive modules = 5 m;

[0096] The distance between the initial position of the unilateral hydraulic push rod and the edge of the steel plate after centering = 0.65 m;

[0097] The moving distance of the unilateral hydraulic push rod to push the steel plate to reach the target rotation angle = 1.1699 m.

[0098] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made by using the content of the specification of the present invention under the inventive concept of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A steel plate rotating device for angle rolling of medium and heavy plates, characterized in that, Including: Two longitudinally arranged screw drive modules symmetrically disposed, parallel to the rolling direction; each longitudinally arranged screw drive module includes an asynchronous motor, a screw, and a convex-shaped sliding guide rail; Two transversely arranged screw drive modules arranged in parallel, perpendicular to the rolling direction; each transversely arranged screw drive module includes an asynchronous motor, a screw, a concave track, a hydraulic push rod assembly, and a sliding guide rod; The transversely arranged screw drive module is connected to the convex-shaped sliding guide rail of the longitudinally arranged screw drive module through the concave track; the hydraulic push rod assembly includes an angle sensor and a cam-spring reset structure for real-time monitoring and controlling the rotation angle of the steel plate.

2. The steel plate rotating device for angle rolling of medium-thick plates according to claim 1, characterized in that, The longitudinally arranged screw drive module includes an asynchronous motor, a coupling, a laser distance sensor, a nut assembly, a screw, two convex-shaped sliding guide rails, two screw bearing seats, and two rolling bearings; among them, the asynchronous motor and the screw bearing seat are fixed to the ground by anchor bolts, the rolling bearings are installed at both ends of the screw and assembled in the screw bearing seats, the screw and the asynchronous motor are connected through the coupling, and the asynchronous motor drives the screw to rotate; the screw and the nut assembly form a screw pair, and the rotation of the screw drives the nut assembly to move longitudinally; the two convex-shaped sliding guide rails are symmetrically arranged about the central axis of the screw and fixed to the ground by bolts, the distance between the two convex-shaped sliding guide rails is less than the roll body length of the front roll table, and its length is greater than the length of the steel plate; the laser distance sensor is fixed at the end of the convex-shaped sliding guide rail.

3. The steel plate rotating device for angle rolling of medium-thick plates according to claim 1, wherein, The transversely arranged screw drive module includes an asynchronous motor, a coupling, laser distance sensor A, laser distance sensor B, a hydraulic push rod assembly, a screw, two sliding guide rods, a base, two rolling bearings, two screw bearing seats, a slide rod base a, a slide rod base b, and a concave track; among them, the asynchronous motor and the screw bearing seat are fixed to the base by bolts, two concave tracks are welded under the base, the rolling bearings are installed at both ends of the screw and assembled in the screw bearing seat B, the asynchronous motor and the screw are connected through the coupling, and the asynchronous motor drives the screw to rotate; the two sliding guide rods are respectively fixed to the base through the slide rod base a and the slide rod base b and are symmetrically arranged on both sides of the screw.

4. The steel plate rotating device for angle rolling of medium and heavy plates according to claim 3, characterized in that, The hydraulic push rod assembly is composed of a push rod base, a hydraulic cylinder, and a piston rod assembly. A threaded hole and two through holes are provided under the push rod base. The screw and the threaded hole cooperate to form a screw pair, and the sliding guide rod passes through the through hole to form a sliding pair. The rotation of the screw drives the hydraulic push rod assembly to move horizontally; laser distance sensor A is fixed on the slide rod base a or the slide rod base b, and laser distance sensor B is fixed at the end of the hydraulic cylinder.

5. The steel plate rotating device for angle rolling of medium and heavy plates according to claim 4, characterized in that, Install the concave track under the base in the transversely arranged screw drive module onto the convex-shaped sliding guide rail in the longitudinally arranged screw drive module to form a sliding pair; and connect the base in the transversely arranged screw drive module to the longitudinally arranged screw drive module by bolts.

6. The steel plate rotating device for angle rolling of medium and heavy plates according to claim 5, characterized in that The piston rod assembly is composed of a piston rod, a spring, a sliding block, a rotating block, an axial positioning nut, and an angle sensor. A tabletop is provided at the upper end of the piston rod, and a hole is drilled on the tabletop for connecting with the spring; There is a milled surface on the piston rod to cooperate with the sliding block and restrict the circumferential rotation of the sliding block; the inside of the sliding block and the rotating block is a columnar cam member, and the two are relatively joined; the axial positioning nut is connected to the end of the piston rod assembly to restrict the axial movement of the rotating block; the upper end surface of the rotating block is used to install the angle sensor.

7. The steel plate rotating device for angle rolling of medium and heavy plates according to claim 6, characterized in that, When performing the steel plate rotation operation, the two hydraulic push rod assemblies are arranged diagonally. The two hydraulic push rod assemblies apply a moment to the steel plate to make the steel plate rotate. Taking the counterclockwise steel plate rotation as an example, the rotating block at the end of the hydraulic push rod assembly rotates synchronously with the steel plate. The side end surface of the rotating block always contacts the edge of the steel plate. The sliding block presses down, and the spring is compressed under force. After the steel plate rotation ends, the rotating block leaves the steel plate, and the spring rebounds to push the sliding block upward. Due to the cam structure inside the sliding block and the rotating block, the rotating block realizes automatic reset.

8. A method for angle rolling of medium-thick plates, using the steel plate rotating device for angle rolling of medium-thick plates according to any one of claims 1-7, comprising the following steps: S1. Preset distance calculation: Determine the distance between the two transverse lead screw drive modules according to the length of the steel plate and the roller path parameters; S2. Lifting of the hydraulic push rod assembly: Control the lifting height of the hydraulic push rod assembly through the laser distance sensor B; S3. Positioning of the hydraulic push rod assembly: The transverse lead screw drive module drives the hydraulic push rod assembly to contact the side of the steel plate to form a diagonal thrust; S4. Execution of steel plate rotation: The two transverse lead screw drive modules move synchronously in the reverse direction, and in combination with the feedback of the angle sensor, drive the steel plate to rotate to the target angle; S5. Reset and rolling: The hydraulic push rod assembly descends and resets, and the steel plate enters the rolling mill for rolling.

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