A method for finding and controlling the offset, pressure of a curled side guide

Abstract

The present invention belongs to the field of hot rolling technology, and in particular relates to a method for offsetting, finding and controlling a curling side guide; the technical solution includes that the curling side guide includes a working side guide and a control side guide, and the curling side guide offset method includes: establishing a curling side guide center line in the middle of the working side guide and the control side guide, and the curling side guide center line is consistent with the moving direction of the strip. Establishing a strip center line on the strip, and the strip center line is parallel to the curling side guide center line. With the working side guide as a reference, obtain the offset of multiple points at the head of the strip and passing through the strip center line relative to the working side guide in a direction perpendicular to the strip center line. According to the offset, the curling side guide moves in a direction perpendicular to the curling side guide center line so that the curling side guide center line overlaps with the strip center line.

Description

Technical Field

[0001] The invention belongs to the technical field of hot rolling, and in particular relates to a method for finding and controlling the offset and pressure of a curling side guide. Background Art

[0002] After finishing rolling, the steel strip needs to be coiled in a coiling machine to form a steel coil for easy storage and transportation. For a long time, the steel coil has been plagued by problems such as towering coils and crushed coils.

[0003] The problems of tower coils and squeezed coils are mainly caused by the side guide of the coil before the strip enters the coiling roller. That is, the head of the strip is offset when entering the coiling roller, resulting in the strip not being able to overlap during the subsequent coiling machine operation, thus causing tower coils. In addition, in order to prevent the strip from deviating in the side guide of the coil, the side guide of the coil applies working pressure on the surface of the strip. However, the working pressure is difficult to control, which may cause damage to the surface of the strip and cause squeezing. Summary of the Invention

[0004] In order to overcome the above-mentioned defects in the related art, the present invention provides a method for offsetting, finding and controlling the pressure of a curling side guide.

[0005] To achieve the above technical objectives, the present invention provides, in one aspect, a method for offsetting a coiling side guide. The coiling side guide includes a working side guide and a control side guide. The method comprises: establishing a coiling side guide centerline between the working side guide and the control side guide, wherein the coiling side guide centerline is aligned with the moving direction of the strip; and establishing a strip centerline on the strip, wherein the strip centerline is parallel to the coiling side guide centerline.

[0006] Taking the working side guide as a reference, obtain the offset of multiple points on the strip head and passing through the strip centerline relative to the working side guide in a direction perpendicular to the strip centerline.

[0007] According to the offset, the curling side guide moves in a direction perpendicular to the center line of the curling side guide, so that the center line of the curling side guide overlaps with the center line of the strip.

[0008] Among them, when the offset is less than or equal to 8 mm, the moving distance of the curling side guide is equal to the offset; when the offset is greater than 8 mm and less than or equal to 15 mm, the moving distance of the curling side guide is 10 mm; when the offset is greater than 15 mm, the moving distance of the curling side guide is 12 mm.

[0009] There are at least eight of the multiple points, and the distances between the eight points from the strip steel end to the strip body are 0.1 meters, 0.3 meters, 1 meter, 3 meters, 7 meters, 12 meters, 20 meters, and 30 meters respectively.

[0010] On the other hand, the present invention also provides a method for finding the pressure of a curling side guide, wherein the curling side guide includes a working side guide and a control side guide, the working side guide includes a working side guide pinch roller and a first pressure sensor, the first pressure sensor is configured to detect the pressure of the working side guide pinch roller on the strip, the control side guide includes a control side guide pinch roller and a second pressure sensor, the second pressure sensor is configured to detect the pressure of the control side guide pinch roller on the strip; the curling side guide pressure finding method includes:

[0011] The steel type, specification and running speed of the strip steel are obtained, and the corresponding movement speed, pressure control time and head pressure of the working side guide and control side guide are extracted.

[0012] The head area of ​​the strip is located in the curling side guide, and the working side guide pinch roller and the control side guide pinch roller are set and controlled in position.

[0013] The working side guide pinch roller and the control side guide pinch roller move toward the strip according to the movement speed, so that the working side guide pinch roller and the control side guide pinch roller bite the strip. The pressure exerted by the working side guide pinch roller and the control side guide pinch roller on the strip after biting is the head pressure, and the working side guide pinch roller and the control side guide pinch roller on the strip maintain the pressure control time.

[0014] Determine whether the strip is pinched or the edge of the strip is squeezed. If so, reduce the head pressure and bite the strip according to the reduced head pressure. If not, reset the control side guide pinch roller to the control position, and maintain the pressure of the working side guide pinch roller on the strip at the working pressure.

[0015] The working pressure includes head pressure and strip body pressure. The head pressure is 1.2 to 1.35 times the strip body pressure. When the working side guide pinch roller is located in the head area of ​​the strip, the pressure on the strip is the head pressure. When the working side guide pinch roller is located in the strip body area of ​​the strip, the pressure on the strip is the strip body pressure.

[0016] The control position is in the vertical direction, 10 to 20 mm away from the strip steel.

[0017] When the thickness of the strip steel is greater than 5.0 mm and the distance between the control side guide pinch roller and the bite strip steel is greater than or equal to 15 mm, the curling side guide exit pressure is sought.

[0018] When the thickness of the strip is less than or equal to 5.0 mm and the distance between the control side guide pinch roller and the bite strip is greater than or equal to 10 mm, the curling side guide exit pressure is sought.

[0019] In another aspect, the present invention further provides a method for controlling a curling side guide, comprising the following steps:

[0020] Before the strip enters the curling side guide, adjusting the opening and offset of the curling side guide according to the curling side guide offset method described in any of the above embodiments;

[0021] The head of the strip enters the curling side guide, and according to the curling side guide pressure finding method described in any of the above embodiments, the pressure of the working side guide pinch roller of the curling side guide on the strip is obtained.

[0022] The beneficial effects of the present invention are:

[0023] The coiling guides are adaptively adjusted based on the offset position of the finished material, ensuring that the strip does not form a pyramidal coil due to offset during coiling. Simultaneously, the coiling guides are adjusted to correct the offset of the finished material, laying the foundation for the subsequent coiling guide pressure search and preventing strip deviation during the pressure search.

[0024] The curling side guide pressure search can be carried out through experimental verification to find the appropriate pressure of the curling side guide, so as to avoid excessive pressure that may damage the strip or too low pressure that may fail to achieve the purpose of guidance. Implementation Method

[0025] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are also within the scope of protection of the present invention.

[0026] In one aspect, the present invention provides a method for offsetting a coiling side guide, wherein the coiling side guide includes a working side guide and a control side guide. The method comprises: establishing a coiling side guide centerline between the working side guide and the control side guide, wherein the coiling side guide centerline is aligned with the moving direction of the strip; and establishing a strip centerline on the strip, wherein the strip centerline is parallel to the coiling side guide centerline.

[0027] Taking the working side guide as a reference, obtain the offset of multiple points on the strip head and passing through the strip centerline relative to the working side guide in a direction perpendicular to the strip centerline.

[0028] According to the offset, the curling side guide moves in a direction perpendicular to the center line of the curling side guide, so that the center line of the curling side guide overlaps with the center line of the strip.

[0029] Among them, when the offset is less than or equal to 8 mm, the moving distance of the curling side guide is equal to the offset; when the offset is greater than 8 mm and less than or equal to 15 mm, the moving distance of the curling side guide is 10 mm; when the offset is greater than 15 mm, the moving distance of the curling side guide is 12 mm.

[0030] There are at least eight of the multiple points, and the distances between the eight points from the strip steel end to the strip body are 0.1 meters, 0.3 meters, 1 meter, 3 meters, 7 meters, 12 meters, 20 meters, and 30 meters respectively.

[0031] On the other hand, the present invention also provides a method for finding the pressure of a curling side guide, wherein the curling side guide includes a working side guide and a control side guide, the working side guide includes a working side guide pinch roller and a first pressure sensor, the first pressure sensor is configured to detect the pressure of the working side guide pinch roller on the strip, the control side guide includes a control side guide pinch roller and a second pressure sensor, the second pressure sensor is configured to detect the pressure of the control side guide pinch roller on the strip; the curling side guide pressure finding method includes:

[0032] The steel type, specification and running speed of the strip steel are obtained, and the corresponding movement speed, pressure control time and head pressure of the working side guide and control side guide are extracted.

[0033] The head area of ​​the strip is located in the curling side guide, and the working side guide pinch roller and the control side guide pinch roller are set and controlled in position.

[0034] The working side guide pinch roller and the control side guide pinch roller move toward the strip according to the movement speed, so that the working side guide pinch roller and the control side guide pinch roller bite the strip. The pressure exerted by the working side guide pinch roller and the control side guide pinch roller on the strip after biting is the head pressure, and the working side guide pinch roller and the control side guide pinch roller on the strip maintain the pressure control time.

[0035] Determine whether the strip is pinched or the edge of the strip is squeezed. If so, reduce the head pressure and bite the strip according to the reduced head pressure. If not, reset the control side guide pinch roller to the control position, and maintain the pressure of the working side guide pinch roller on the strip at the working pressure.

[0036] The working pressure includes head pressure and strip body pressure. The head pressure is 1.2 to 1.35 times the strip body pressure. When the working side guide pinch roller is located in the head area of ​​the strip, the pressure on the strip is the head pressure. When the working side guide pinch roller is located in the strip body area of ​​the strip, the pressure on the strip is the strip body pressure.

[0037] The control position is in the vertical direction, 10 to 20 mm away from the strip steel.

[0038] When the thickness of the strip steel is greater than 5.0 mm and the distance between the control side guide pinch roller and the bite strip steel is greater than or equal to 15 mm, the curling side guide exit pressure is sought.

[0039] When the thickness of the strip is less than or equal to 5.0 mm and the distance between the control side guide pinch roller and the bite strip is greater than or equal to 10 mm, the curling side guide exit pressure is sought.

[0040] In another aspect, the present invention further provides a method for controlling a curling side guide, comprising the following steps:

[0041] Before the strip enters the curling side guide, adjusting the opening and offset of the curling side guide according to the curling side guide offset method described in any of the above embodiments;

[0042] The head of the strip enters the curling side guide, and according to the curling side guide pressure finding method described in any of the above embodiments, the pressure of the working side guide pinch roller of the curling side guide on the strip is obtained.

[0043] In the description of this specification, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0044] The above are only specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A curling side guide offset method, wherein the curling side guide includes a working side guide and a control side guide, characterized in that: The curling side guide offset method includes: Establishing a curling side guide center line in the middle of the working side guide and the control side guide, wherein the curling side guide center line is consistent with the moving direction of the strip; Establishing a strip centerline on the strip, wherein the strip centerline is parallel to the curling side guide centerline; Taking the working side guide as a reference, obtaining the offset of multiple points on the strip head and passing through the strip centerline relative to the working side guide in a direction perpendicular to the strip centerline; According to the offset amount, the curling side guide moves in a direction perpendicular to the center line of the curling side guide so that the center line of the curling side guide overlaps with the center line of the strip; Among them, when the offset is less than or equal to 8 mm, the moving distance of the curling side guide is equal to the offset; when the offset is greater than 8 mm and less than or equal to 15 mm, the moving distance of the curling side guide is 10 mm; when the offset is greater than 15 mm, the moving distance of the curling side guide is 12 mm.

2. A curling side guide deviation method according to claim 1, characterized in that: There are at least eight of the multiple points, and the distances between the eight points from the strip steel end to the strip body are 0.1 meters, 0.3 meters, 1 meter, 3 meters, 7 meters, 12 meters, 20 meters, and 30 meters respectively.

3. A method for finding the pressure of a curling side guide, wherein the curling side guide includes a working side guide and a control side guide, the working side guide includes a working side guide pinch roller and a first pressure sensor, the first pressure sensor is configured to detect the pressure of the working side guide pinch roller on the strip, the control side guide includes a control side guide pinch roller and a second pressure sensor, the second pressure sensor is configured to detect the pressure of the control side guide pinch roller on the strip; characterized in that The method for finding the curling side guide pressure includes: Obtain the steel grade, specification and running speed of the strip steel, and extract the corresponding movement speed, pressure control time and head pressure of the working side guide and the control side guide; The head area of ​​the strip is located in the curling side guide, and the working side guide pinch roller and the control side guide pinch roller are set and controlled in position; The working side guide pinch roller and the control side guide pinch roller move toward the strip according to the movement speed, so that the working side guide pinch roller and the control side guide pinch roller bite the strip. The pressure exerted by the working side guide pinch roller and the control side guide pinch roller on the strip after the pinching is the head pressure. The working side guide pinch roller and the control side guide pinch roller maintain the pressure on the strip for a controlled time. Determine whether the strip is pinched or the edge of the strip is squeezed. If so, reduce the head pressure and bite the strip according to the reduced head pressure. If not, reset the control side guide pinch roller to the control position, and maintain the pressure of the working side guide pinch roller on the strip at the working pressure.

4. A method for finding the curling side guide pressure according to claim 3, characterized in that: The working pressure includes head pressure and strip body pressure. The head pressure is 1.2 to 1.35 times the strip body pressure. When the working side guide pinch roller is located in the head area of ​​the strip, the pressure on the strip is the head pressure. When the working side guide pinch roller is located in the strip body area of ​​the strip, the pressure on the strip is the strip body pressure.

5. The method for finding the curling side guide pressure according to claim 3, characterized in that: The control position is in the vertical direction, 10 to 20 mm away from the strip steel.

6. A method for finding the curling side guide pressure according to claim 3, characterized in that: When the thickness of the strip steel is greater than 5.0 mm and the distance between the control side guide pinch roller and the bite strip steel is greater than or equal to 15 mm, the curling side guide exit pressure is sought.

7. A method for finding the curling side guide pressure according to claim 3, characterized in that: When the thickness of the strip is less than or equal to 5.0 mm and the distance between the control side guide pinch roller and the bite strip is greater than or equal to 10 mm, the curling side guide exit pressure is sought.

8. A method for controlling a curling side guide, characterized in that: The steps include: Before the strip enters the curling side guide, the curling side guide offset method according to claim 1 or 2 is used to adjust the opening and offset of the curling side guide; The head of the strip enters the curling side guide, and the curling side guide pressure finding method according to any one of claims 3 to 7 is used to obtain the pressure of the working side guide pinch roller of the curling side guide on the strip.