A method for early transfer of wide and thick plates

Abstract

The application relates to a wide and thick plate early steel transferring method, which comprises the following steps: S1. setting two groups of flat roller tables and marking them as group A roller tables and group B roller tables respectively, conveying a blank from the group A roller tables to a rolling mill direction, and the group B roller tables being a group of reverse roller tables which can be reversely arranged relative to the group A roller tables; S2. calculating a diagonal line value formed by the length and width of a received steel plate, judging whether the head of the blank is in front of the group B roller tables or not: if the diagonal line value of the steel plate is smaller than the width of a transmission track of the rolling mill and the head of the blank is in front of the group B roller tables, the group B roller tables adopt a reverse mode; if the diagonal line value of the steel plate is larger than the width of the transmission track of the rolling mill and / or the head of the blank is not in front of the group B roller tables, the group B roller tables and the group A roller tables are turned to the same direction, and the steel plate is sent into the rolling mill; S3. controlling a handle of an operator, so that the blank keeps the inertia of being conveyed forward, and the head of the blank contacts the group B roller tables and then starts to transfer the steel; the early steel transferring purpose is achieved by adopting the two groups of flat roller tables, and the steel plate production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the production technology field of wide and heavy plate rolling mill, in particular to a method for early transfer of wide and heavy plate. BACKGROUND

[0002] In the production process of wide and heavy plate reversing rolling mill, the transverse and longitudinal rolling mode of the blank is an effective rolling strategy considering the production efficiency and size accuracy control, so it is widely used.

[0003] With the increasing demand for rolling rhythm improvement, the industry often uses the method of replacing the flat bar of the whole set of conveying roller with the tapered roller to achieve the purpose of early transfer of steel plate, thereby saving one pass of transfer time.

[0004] But not all steel plates require the first pass transfer, when the tapered roller is used as a conveying roller, due to the structure of the tapered roller, which is thick at one end and thin at the other end, it is easy to cause the wear of the roller surface, and it is easy to make the steel plate walk obliquely and hit the roller edge guard surface. SUMMARY

[0005] The present application provides a method for early transfer of wide and heavy plate.

[0006] The technical scheme adopted by the present application to solve its technical problems is: a method for early transfer of wide and heavy plate, comprising the following steps:

[0007] S1. Set two groups of flat roller and mark them as group A roller and group B roller respectively, the blank is conveyed from group A roller to the rolling mill direction, and group B roller is a group of reverse roller which can reverse relative to group A roller;

[0008] S2. Calculate the diagonal value formed by the length and width of the received steel plate, and judge whether the head of the blank is in front of group B roller:

[0009] If the diagonal value of the steel plate is less than the width of the transmission track of the rolling mill and the head of the blank is in front of group B roller, group B roller adopts reverse mode;

[0010] If the diagonal value of the steel plate is greater than the width of the transmission track of the rolling mill and / or the head of the blank is not in front of group B roller, group B roller and group A roller have the same turning direction, and the steel plate is sent into the rolling mill;

[0011] S3. Control the handle of the operator to make the blank keep the inertia of forward conveying, and start the transfer of the steel plate after the head of the blank contacts group B roller;

[0012] S4. After the transfer is completed, control group B roller to positive rotation, and convey the transferred steel plate to the rolling mill direction.

[0013] In step S2, the transmission roller of the rolling mill is set to 5m, and the diagonal value of the steel plate is less than 4.75m.

[0014] The speed of the group A roller table and the group B roller table in step S2 is 1.0 m / s.

[0015] By the above technical solution, compared with the prior art, the present application has the following beneficial effects:

[0016] The two groups of flat roller tables are adopted, and the purpose of early steel transfer can be achieved by controlling the roller tables, the large transformation of mechanical equipment is avoided, the problem of steel plate walking obliquely is avoided, and the steel plate production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0017] The present application will be further described below in combination with the drawings and examples.

[0018] Figure 1 is a schematic diagram for embodying the transmission of the steel plate from the group A roller table to the group B roller table according to the present application;

[0019] Figure 2 is a schematic diagram for embodying the steel transfer state according to the present application. DETAILED DESCRIPTION

[0020] The present application will be further described below in combination with the drawings and examples. In the description of the present application, it should be understood that the terms "left side", "right side", "upper part", "lower part" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and "first", "second" and the like do not represent the importance of the parts, and therefore cannot be understood as a limitation on the present application. The specific dimensions used in the present embodiment are only for the purpose of illustrating the technical solutions and do not limit the protection scope of the present application.

[0021] As shown in Figure 1 and Figure 2 , a wide and thick plate early steel transfer method according to the present application comprises the following steps:

[0022] S1. Two groups of flat roller tables are provided and are respectively denoted as group A roller table and group B roller table, the blank is conveyed from the group A roller table to the rolling mill direction, and the group B roller table is a group of reverse roller tables which can be reversed in the opposite direction relative to the group A roller table.

[0023] S2. The rolling system of the wide and thick plate is adopted, including a primary automatic control and a secondary computer control system, and the early steel transfer mode is a function interface added based on the wincc system;

[0024] The operator is responsible for whether the early steel transfer function needs to be used:

[0025] If the steel transfer is not needed, the early steel transfer function key is not checked in the HMI window;

[0026] If the steel needs to be turned, the HMI window is checked for the function key of the steel turning, triggering the secondary computer control system to determine whether the steel plate meets the steel turning conditions, including the diagonal value of the steel plate being less than the width of the transmission track of the rolling mill and the head of the blank being in front of the B group roller. The roller is set to 5m, and the diagonal value of the steel plate is less than 4.75m;

[0027] If the conditions are met, the primary receives the secondary procedures, controls the reverse rotation of the B group roller, and the speed of the A group roller and the B group roller is 1.0m / s; if the diagonal value of the steel plate is greater than the width of the transmission track of the rolling mill and / or the head of the blank is not in front of the B group roller, the conditions are not met, the primary automation control system does not generate the steel turning conditions, the B group roller and the A group roller turn in the same direction, and the steel plate is not affected and is normally transported to the rolling mill for rolling production.

[0028] S3. Control the handle of the operator, which is one of the control devices of the operation platform, and the function is to control whether the roller goes forward or backward. The operator keeps the blank moving forward by inertia through the handle, and the head of the blank contacts the B group roller to start the steel turning.

[0029] Under the action of inertia, part of the head of the blank enters the B group roller, and most of the blank remains in the A group roller at this time. The friction direction of the lower surface of the blank on the A group roller and the B group roller is also different. Due to the difference in the contact area of the lower surface of the blank on the A group roller and the B group roller, the friction force received by the blank in the A group roller area is obviously greater than that received by the blank in the B group roller. The friction force received by different areas of the blank is different in direction and size, so a deflection parallel to the roller plane is generated, and the deflection direction is controlled by the center line of the blank during the steel tapping, and the deflection direction is to the side of the roller center line. After repeated friction between the A group roller and the B group roller, the steel plate can finally be turned transversely and stopped on the A group roller.

[0030] S4. After the steel turning is completed, the B group roller is controlled to rotate forward to transport the turned steel plate to the rolling mill.

[0031] Those skilled in the art can understand that unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as generally understood by those skilled in the art to which the present application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood as having meanings consistent with those in the prior art, and should not be interpreted with idealized or overly formal meanings unless otherwise defined.

[0032] The meaning of "and / or" described in the present application means that each single existence or both existences are included.

[0033] The meaning of "connection" described in the present application can be direct connection between components or indirect connection between components through other components.

[0034] The above-described embodiments according to the present application are merely exemplary and are not intended to limit the present application. A person skilled in the art can make various modifications and changes within the scope of the present application. The technical scope of the present application should be defined by the appended claims rather than by the detailed description.

Claims

1. A method of early transfer of a wide and thick plate, characterized by, The method comprises the following steps: S1. Two groups of flat roller tables are set and are respectively recorded as group A roller table and group B roller table, the billet is conveyed from the group A roller table to the rolling mill direction, and the group B roller table is a group of reverse roller table which can be reversely rotated relative to the group A roller table; S2. The diagonal line value formed by the length and width of the received steel plate is calculated, and it is judged whether the head of the billet is in front of the group B roller table: If the diagonal line value of the steel plate is less than the width of the transmission track of the rolling mill and the head of the billet is in front of the group B roller table, the group B roller table adopts the reverse mode; If the diagonal line value of the steel plate is greater than the width of the transmission track of the rolling mill and / or the head of the billet is not in front of the group B roller table, the group B roller table is turned to the same direction as the group A roller table, and the steel plate is sent into the rolling mill; S3. The handle of the operator is controlled, so that the billet keeps the inertia of conveying forward, and the head of the billet contacts the group B roller table and starts to rotate the steel plate; Under the action of the inertia, a part of the head of the billet enters the group B roller table, at this time, most of the billet remains in the group A roller table, and the friction directions of the lower surface of the billet on the group A roller table and the group B roller table are different; due to the different sizes of the contact surfaces of the lower surface of the billet on the group A roller table and the group B roller table, the friction force received by the billet in the group A roller table area is greater than that received by the billet in the group B roller table; the friction forces received by different areas of the billet are different in direction and size, so that the deflection parallel to the roller table plane is generated, the deflection direction is controlled by the center line of the billet when the steel plate is discharged, and the deflection direction is to the side of the center line of the roller table; after multiple friction between the group A roller table and the group B roller table, the steel plate can be finally rotated transversely and then stopped on the group A roller table; S4. After the rotation of the steel plate is completed, the group B roller table is controlled to be positively rotated, and the rotated steel plate is conveyed to the rolling mill direction. In step S2, the transmission roller table of the rolling mill is set to 5 m, and the diagonal line value of the steel plate is less than 4.75 m.

2. The method of claim 1, wherein, In step S2, the speed of the group A roller table and the group B roller table is 1.0 m / s.

3. The method of claim 1, wherein the thick plate is transferred in advance. ​

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