JP2007216278A - Equipment of rolling steel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve productivity by shortening the processing interval between slabs in a plate rolling line of a slab. <P>SOLUTION: A heating furnace 10, descaling apparatus 11, turning device 12, turntable 13 and rolling mill 14 are installed in order from the upstream side on a rolling line L. In the turning device 12, the next slab H can be turned while a slab H in front is rolled in the rolling mill 14. The turning device 12 is installed so that the distance from the rolling mill 14 is longer than the maximum rolled length of operated steel. A tong-type device with which the slab H is clamped, lifted and turned is used for the turning device 12. The slab H is beforehand turned on its side in the turning apparatus 12, carried in the rolling mill 14 and rolled as soon as the rolling of the preceding slab is finished. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rolling facility for rolling a steel material such as a slab.

  For example, in the hot rolling process of thick plates, the cast slab is heated in a heating furnace, and then the scale on the surface of the slab is removed by a scale removal device, and then the slab is sent to a rolling mill for a predetermined length and width. , Rolled to thickness. This hot rolling process is performed in a series of rolling lines, and in this rolling line, a plurality of slabs are sequentially conveyed and processed.

  In the above rolling mill, the slab is rolled in two directions, ie, the width direction and the longitudinal direction, according to the dimensions of the thick plate product. For this reason, it is necessary to turn the slab 90 ° during the rolling. Therefore, conventionally, a turning table for turning the slab with a roll has been provided on the front surface of the rolling mill of the rolling line (see Patent Document 1).

  In the rolling line described above, the slab that has been heated is conveyed with its longitudinal direction directed in the conveying direction. And a slab is turned 90 degree | times with the above-mentioned turning table just before a rolling mill, and the width direction is orient | assigned to a conveyance direction. In the horizontal state, the slab passes through the rolling mill and is rolled in the width direction. Thereafter, the slab is returned again to the original direction by the turning table, and then the rolling is performed in the longitudinal direction by reciprocating the rolling mill a plurality of times.

JP-A-6-7828

  By the way, in the above rolling line, the slab is continuously conveyed, but while the previous slab is being rolled by the rolling mill, since the rolling mill and the turntable are in use, the next slab is being used. Had to wait on the upstream side of the turntable. For this reason, the slab was rolled by a rolling mill after it was sent to the turning table and turned after the rolling of the previous slab was completed. Therefore, the slab rolling interval in the rolling line was long and the productivity was not high.

  The present invention has been made in view of the above points, and an object of the present invention is to improve productivity by shortening a rolling treatment interval of steel materials in a rolling line in a rolling equipment for steel materials such as slabs.

  According to the present invention for achieving the above object, in the rolling line in which the heating furnace, the scale removing device, and the rolling mill are provided in this order from the upstream side, while the previous steel material is being rolled by the rolling mill. Comprising a turning device for turning the next steel material, wherein the turning device is a tong type that grips and lifts and turns the steel material, and is installed between the scale removing device and the rolling mill, A rolling facility for rolling steel is provided.

  According to the present invention, the direction of the next steel material can be changed in advance to the rolling direction while the previous steel material is being rolled by a rolling mill. For this reason, after the rolling process of the previous steel material is completed, the next steel material can be immediately sent to a rolling mill for rolling. As a result, it is possible to shorten the rolling interval of the steel material and improve the productivity of the rolling line. In addition, since the tong type is used as the turning device, the steel material can be reliably turned stably. Therefore, it is not necessary to place a worker for the turning operation of the steel material, and the steel turning operation can be automated. Furthermore, since this turning device is provided on the downstream side of the scale removing device, the steel material with the scale attached is not gripped by the tongs, and surface flaws caused by this can be prevented.

  The turning device may be installed such that a distance from the rolling mill is longer than a maximum rolling length of the operation steel material.

  Between the tong type rolling device and the rolling mill, another rolling device for rolling the steel material in the vicinity of the rolling mill may be provided. The vicinity of the rolling mill means a position at least closer to the tong type rolling device.

  The rolling line is provided with a sensor for detecting a position in the length direction and a position in the width direction of the steel material, and a center portion in the length direction of the steel material according to detection information of the sensor for detecting a position in the length direction of the steel material. The steel material is stopped so that it coincides with the center of the turning device, and the center of the turning device is moved to coincide with the center of the width direction of the steel material according to the detection information of the sensor that detects the position of the steel material in the width direction. Then, the side surface of the steel material may be gripped by the tongue of the rolling device.

  ADVANTAGE OF THE INVENTION According to this invention, in the rolling line of steel materials, the processing interval of steel materials can be shortened and productivity can be improved.

  Hereinafter, preferred embodiments of the present invention will be described. Drawing 1 is a mimetic diagram showing the outline of the composition of rolling equipment 1 of steel materials concerning this embodiment.

  The rolling equipment 1 includes, for example, a heating furnace 10, a scale removing device 11, a turning device 12, a turning table 13 as another turning device, a rolling machine 14, a straightening machine 15, a cooling device 16, and the like in this order. , Constituting a rolling line L. In the rolling line L, a plurality of slabs H can be continuously conveyed and processed.

  The heating furnace 10 is a walking beam type continuous heating furnace, for example, and can heat the cast slab H to a temperature necessary for rolling or a temperature for obtaining a desired material.

  On the exit side of the heating furnace 10, for example, a linear roller transport table A along the X direction (left and right direction in FIG. 1) is formed, and on the roller transport table A, the scale removing device 11, the turning device 12, A turning table 13, a rolling mill 14, a straightening machine 15 and a cooling device 16 are installed.

  The scale removing device 11 can remove oxide (scale) on the surface of the slab, for example, by jetting high pressure water to the slab H.

  The turning device 12 is, for example, a tong-type lifting and turning device, and can hold the side surface of the slab H and lift it to turn the slab H by 90 °. The rolling device 12 is provided at a position away from the rolling mill 14 on the downstream side by the maximum rolling length of the operating steel material, for example, 80 m or more. The details of the configuration of the turning device 12 will be described later.

  The turning table 13 is provided immediately before the rolling mill 14, for example, at a position within 20 m of the rolling mill 14. For example, as shown in FIG. 2, a plurality of rolls 20 having a large diameter portion 20 a and a small diameter portion 20 b on the same axis are arranged in parallel on the rolling table 13 along the roller conveyance table A. The plurality of rolls 20 are arranged so that the positions of the large diameter portions 20a are alternately staggered. As the adjacent rolls 20 rotate in opposite directions, the slab H on the turntable 13 can be turned.

  For example, a reverse type mill is used for the rolling mill 14 shown in FIG. 1, and the slab H can be passed back and forth to perform reciprocating rolling.

  The straightening machine 15 can correct the shape of the rolled steel sheet with a roll, and the cooling device 16 can reduce the temperature of the rolled steel sheet to a predetermined temperature.

  Next, the configuration of the above-described turning device 12 will be described. For example, as shown in FIG. 3, the rolling device 12 includes a main body portion 40 that grips and rotates the side surface of the slab H, and a support structure portion 41 that supports the main body portion 40 and moves it up and down.

  The main body 40 includes a horizontal plate-like horizontal base 50, for example. A rotating drum 52 that is rotated about a central axis N in the vertical direction by a motor 51 is attached to the upper part of the horizontal base 50. The central axis N passes through the center of the horizontal base 50. Two sets of gripping members (tongues) 53 that grip the slab H from both sides are attached to both sides of the horizontal base 50 in the Y direction (the direction perpendicular to the transport direction X of the roller transport table A). The gripping member 53 can be moved in the Y direction by a cylinder 54 attached to the horizontal base 50, for example.

  A gate-type frame 60 is formed on the support structure 41 so as to straddle the roller transport table A, for example. A rail 61 is formed on the upper surface of the portal frame 60, and a carriage 62 is provided on the rail 61. A wire 63 that suspends the main body 40 is connected to the carriage 62. The carriage 62 is provided with a winch 64 for raising and lowering the wire 63, and the main body 40 can be moved up and down by raising and lowering the wire 63.

  With this configuration, the direction of the slab H can be changed by gripping the side surface of the slab H on the roller transport table A by the gripping member 53, lifting the slab H by the winch 64 and rotating the slab H by the rotating drum 52. .

  As shown in FIG. 4, for example, the turning device 12 is provided with a position sensor 70 for detecting the position of the slab H on the roller transport table A. The position sensors 70 are provided at two locations along the roller transport table A. Each position sensor 70 is a laser distance sensor, for example, and can measure the distance from the side of the roller transport table A to the side surface of the slab H. The measurement result of the position sensor 70 can be output to the control unit 71, for example. The control unit 71 can detect the center position of the slab H in the Y direction (slab width direction) based on the distance from each position sensor 70 to the slab H and the preset width of the slab H. Based on the detection result, the control unit 71 can control the operation of the carriage 62, for example, so that the center axis N of the main body 40 (the center of the turning device 12) is aligned with the center of the slab H in the Y direction.

  Further, for example, the roller conveyance table A of the turning device 12 is provided with a sensor 80 that detects the presence or absence of the slab H. This sensor 80 can detect that the tip of the slab H has passed above. The output result of the sensor 80 can be output to the control unit 71, for example. The length of the slab H is input to the control unit 71 in advance, and the control unit 71 controls the roller transport table A based on the length information of the slab H and the output result of the sensor 80, and the slab H The slab H can be stopped so that the center of H in the X direction (slab length direction) coincides with the center of the rolling device 12.

  Next, the thick plate rolling process of the slab H performed in the rolling equipment 1 configured as described above will be described.

  First, a plurality of slabs H are sequentially carried into the heating furnace 10 and heated to a desired temperature. The slab H heated in the heating furnace 10 is sequentially carried out to the roller conveyance table A as shown in FIG. The slab H carried into the roller conveyance table A is conveyed downstream, and first passes through the scale removing device 11 and the scale is removed with high-pressure water. Subsequently, the slab H is conveyed to the turning device 12. In the turning device 12, for example, the tip of the slab H is detected by the sensor 80, and the slab H stops so that the center of the slab H is located directly below the central axis N of the main body 40 as viewed from the side as shown in FIG. 4. Is done. Thereafter, the center position of the slab H in the Y direction is detected by the position sensor 70, the position of the carriage 62 in the Y direction is corrected based on the detected position, and the center axis N of the main body 40 and the center of the slab H are aligned. Thereafter, the main body 40 is lowered by the winch 64 shown in FIG. 3, and the slab H is gripped by the gripping member 53. Thereafter, the main body 40 is raised by the winch 64, and the slab H is lifted. The rotating drum 52 rotates and the slab H is rotated 90 °. Thus, as shown in FIG. 5, the slab H is turned sideways, and the width direction of the slab H is directed in the transport direction. The slab H is lowered by the winch 64 and placed again on the roller transport table A.

  Thereafter, the slab H is transported on the roller transport table A in a lateral state, passes through the turning table 13 and is carried into the rolling mill 14. Thereby, rolling of the slab H in the width direction is performed. After the slab H is widened, the slab H is returned to the turntable 13 as shown in FIG. In the turning table 13, the roll 20 rotates, the slab H is turned 90 °, and the longitudinal direction of the slab H is directed in the transport direction.

  Thereafter, the slab H is rolled while reciprocating the rolling mill 14 a plurality of times back and forth as shown in FIG. 7 and rolled to a predetermined length. The rolled steel sheet H is conveyed in order to the downstream straightening machine 15 and cooling device 16.

  As shown in FIG. 7, while the previous slab H is being rolled in the rolling mill 14, the next slab H is turned 90 ° in the turning device 12 and waits in a sideways state. Then, when the rolling of the previous slab H is completed, the next slab H is immediately conveyed to the rolling mill 14 and rolled. In this way, a plurality of slabs H are sequentially conveyed, and the next slab H is turned sideways in the turning device 12 while the previous slab H is being rolled.

  According to the above embodiment, since the turning device 12 different from the turning table 13 immediately before the rolling mill 14 is provided between the scale removing device 11 and the rolling mill 14 in the rolling line L, the previous slab is provided. While H is being rolled in the rolling mill 14, the next slab H can be rolled in advance in the horizontal direction. By carrying out like this, after the rolling process of the previous slab H is complete | finished, the next slab H can be immediately conveyed to the rolling mill 14, and a width direction rolling can be performed. As a result, in the rolling line L, the slab H can be processed at shorter intervals, and the productivity of the rolling mill 14 can be improved.

  In addition, since the turning device 12 is a tong type device that grips the slab H with the gripping member 53, lifts it, and rotates it, the slab H can be rotated stably and reliably. In particular, since the slab H does not slip as compared with a roll 20 such as the turn table 13, the stability of the slab H can be improved. In addition, since the turning stability can be improved in this way, the operator does not need to operate the turning device 12. For this reason, even if it arrange | positions the turning device 12 in the position away from the rolling mill 14 with a worker, it is not necessary to arrange | position a separate worker for the turning device 12, and can be automated.

  By the way, when the scale is attached to the side surface of the slab H, when the slab H is pressed by the gripping member 53, a pressing rod is generated at the pressed portion. This indentation flaw appears as a linear flaw on the surface of the steel plate after rolling. According to the present embodiment, since the turning device 12 is provided on the downstream side of the scale removing device 11, the slab H is gripped by the gripping member 53 of the turning device 12 after removing the scale on the side surface of the slab H. . As a result, indentation flaws by the gripping member 53 do not occur on the side surface of the slab H, and no flaws remain on the surface of the rolled steel sheet. Therefore, the quality of the rolled steel sheet can be maintained.

  Since the turning device 12 is installed such that the distance to the rolling mill 14 is longer than the maximum rolling length of the operational steel material, the slab H being rolled in the rolling mill 14 interferes with the slab H of the turning device 12. In other words, rolling of the rolling mill 14 and turning of the turning device 12 can be performed at the same time.

  Since the rotation device 12 is provided with the position sensor 70 and the sensor 80 and the position of the slab H on the roller transport table A is detected, the slab H on the roller transport table A can be stably and reliably gripped. Can prevent lifting failure and falling. Further, since the center of the slab H can be gripped, the slab H can be lifted and rotated with good balance.

  The preferred embodiment of the present invention has been described above with reference to the accompanying drawings, but the present invention is not limited to such an example. It will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the spirit described in the claims, and these are naturally within the technical scope of the present invention. It is understood that it belongs.

  For example, in the above embodiment, the turning device 12 is fixed, but it may be allowed to travel between the scale removing device 11 and the rolling mill 14 along the roller transport table A. In this case, for example, both turning of the waiting slab H and turning of the slab H during the rolling process can be performed by the turning device 12. Therefore, for example, the turning table 13 immediately before the rolling mill 14 becomes unnecessary, and the turning of the slab H can be performed by one turning device 12.

  In the above embodiment, the turning table 13 is provided immediately before the rolling mill 14, but may be provided immediately before or after the rolling mill 14. In the present embodiment, the present invention is applied to the rolling equipment of the slab H, but can be applied to other types of steel materials other than the slab H.

  The present invention is useful in improving the productivity of steel rolling equipment.

It is a schematic diagram which shows the outline of a structure of rolling equipment. It is a top view which shows the structure of a turning table. It is a perspective view which shows the structure of a turning apparatus. It is explanatory drawing which shows the position of the sensor of a turning apparatus. It is a schematic diagram of the rolling equipment for demonstrating a rolling process. It is a schematic diagram of the rolling equipment which shows the state by which the slab was turned by the turning table. It is a schematic diagram of the rolling equipment which shows the state by which the slab is rolled.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rolling equipment 10 Heating furnace 11 Scale removal apparatus 12 Turning apparatus 13 Turning table 14 Rolling mill L Rolling line A Rolling conveyance table H Slab

Claims (4)

In a rolling line in which a heating furnace, a scale removing device, and a rolling mill are provided in this order from the upstream side, a rolling device for rolling the next steel material while the previous steel material is rolled by the rolling mill,
The rolling device is a tong type that grips, lifts, and turns a steel material, and is installed between the scale removing device and the rolling mill. The steel rolling facility according to claim 1, wherein the turning device is installed such that a distance from the rolling mill is longer than a maximum rolling length of the operating steel material. The steel material according to claim 1 or 2, wherein another rolling device for rolling the steel material in the vicinity of the rolling mill is provided between the tong type rolling device and the rolling mill. Rolling equipment. The rolling line has a sensor for detecting the position in the length direction and the width direction of the steel material,
According to the detection information of the sensor for detecting the position in the length direction of the steel material, the steel material is stopped so that the center portion in the length direction of the steel material coincides with the center of the turning device, and the position in the width direction of the steel material is determined. The side surface of the steel material is gripped by the tongue of the turning device after the turning device moves so that the center of the turning device coincides with the center in the width direction of the steel material according to detection information of the sensor to be detected. The rolling equipment for steel materials according to any one of?

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