JPH0515923A - Metal slab conditioning equipment row - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a refinement device array capable of effectively performing a refinement work of a metal slab while hot in a process of directly connecting a continuous casting process and a steel plate rolling process. In a metal slab manufacturing apparatus row, a traverse transportation apparatus 9a is connected to a side portion on an outgoing side of a first transportation apparatus row 3, 4, 5 equipped with a hot surface inspection apparatus 4. Second transport device row 10, 1 capable of transporting parallel to the first transport device row 3, 4, 5.
1 is equipped with a full-face abrasion machine 10 and a surface inspection device 11,
The transverse transport device 9b is connected to the side of the output side of the second transport device rows 10 and 11. The partial grinding device 1 is provided on the third transfer device rows 13 and 14 that can be transferred in parallel to the second transfer device rows 10 and 11.
4 is provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a case where a metal slab is cast by a continuous casting machine, hot defects are inspected on the surface of the metal slab, and surface defects are removed by fusing or grinding. The present invention relates to a train of adjusting devices.

[0002]

2. Description of the Related Art In order to make full use of the low-cost mass-production capacity, which is a feature of continuous casting machines, an energy-saving process has been established by integrating the slab size and directly connecting to the rolling process. Various methods have been proposed as a method of supplying the continuous casting slab to the rolling process.

For example, as disclosed in Japanese Patent Application Laid-Open No. 55-19465, a metal slab having a constant width dimension is manufactured in a continuous casting process, the slab is heated, and then width reduction rolling is performed, which is then rolled into a steel sheet. There is a method of supplying it to the process. The widthwise rolling of this metal slab is performed by a vertical rolling mill having a hole type, but if the width direction rolling amount is increased and the width change amount is increased, a local plate thickness called dogbone is formed on the slab cross section. Increased part occurs. When the locally increased thickness portion becomes large, surface defects due to biting from the die and increase in rolling power in widthwise rolling are caused.

Therefore, as a hot width reduction rolling method, as disclosed in, for example, Japanese Patent Laid-Open No. 55-117501,
There is a width rolling method for a metal slab in which only the locally increased portion of the plate thickness generated by the width rolling is horizontally rolled down to have the same thickness as the supplied metal slab thickness, and the width rolling is repeatedly performed again using a hole roll.

Further, as an apparatus train for directly connecting and supplying a metal slab to the continuous casting process and the steel plate rolling process, for example, a continuous cooling device is directly connected to a continuous casting line as described in Japanese Patent Publication No. 53-7373. Then, after cutting the slab, the traverse transporting device in which the outlet side of the continuous cooling device is connected to the side part
There is a metal slab manufacturing device line that sends to the next cooling device, cares for surface flaws on a care conveyor connected to the side part, and sends to the steel plate process.

[0006]

The feature of the hot width rolling method for the metal slab is that, unlike the conventional slab-rolling method for steel ingots, it is intended for continuously cast slabs, and roll contact during rolling is performed. The ratio of the arc length to the average plate width, that is, the roll gap shape ratio is as small as 0.1 to 0.2, and the cyclic width reduction amount per one time is as large as 200 to 300 mm. Therefore, the width reduction force due to the vertical rolls during width rolling does not propagate to the center of the width, and a locally increased thickness portion occurs at both end portions of the width. When so-called dog bone leveling rolling is performed in which the thickened part is horizontally rolled to the original thickness of the metal slab as in the past, during the leveling rolling, minute vertical cracks due to sagging or wrinkles in the dog bone part are formed. 10-20 mm at the center of the width due to a surface defect or a parting phenomenon in which the widthwise central part is also stretched in the longitudinal direction when the plate thickness increasing parts at both ends of the plate width are stretched in the longitudinal direction. Depth of depth occurs. Since the compressive stress due to rolling does not act on this indented portion and it is just a tensile phenomenon, the internal quality is different from the locally deformed portion at both ends of the plate width, and the internally solidified structure undergoes plastic working by rolling. However, the material becomes inferior in terms of material quality, and surface flaws often occur, for example, cracking flaws caused by casting become apparent by pulling.

[0007] In the conventional apparatus row, a cooling device is provided to carry out surface maintenance of the metal slab, and a full-fusing machine is installed in the production line. For this reason, in the width rolling process that directly connects the continuous casting process and the hot rolling process, the hot-conditioning device line that detects and removes the surface defects of the hot slab without impairing the rolling efficiency is used. Was strongly desired. The present invention provides an effective metal slab hot-conditioning device array that solves the above problems.

[0008]

DISCLOSURE OF THE INVENTION The gist of the present invention is, in a metal slab manufacturing apparatus row, a side portion on the outlet side of a first conveyor row having a device for hot-inspecting the surface of the metal slab. To the second conveying device row that can be conveyed in parallel to the first conveying device row by connecting the transverse conveying device to the device, which is capable of hot-melting the entire surface of the metal slab, and the metal slab after the welding. A metal slab is provided on the third carrier row, which is equipped with a device for inspecting the surface, has a transverse carrier connected to the side of the exit side of the second carrier row, and is capable of carrying parallel to the second carrier row. It is equipped with a device that can partially grind the surface of the metal by hot, and it is a metal slab conditioning device train that enables the movement of metal slabs between the first carrier train, the second carrier train, and the third carrier train. is there.

[0009]

According to the present invention, in a metal slab manufacturing apparatus row which directly connects the continuous casting step and the steel plate rolling step, a surface flaw inspection apparatus for the metal slab is provided (first conveying apparatus row), and the output of the equipment row is provided. On the side of the side, there is provided a full-scale ablation device and a surface defect inspection device for metal slabs (second conveying device row), and further, a surface defect removing device capable of partially grinding is provided on the output side of the equipment row ( Third carrier row). That is, the present invention does not provide a surface defect removing device for a metal slab in a manufacturing device row, only a surface inspection device is provided, and a device for removing various surface defects is provided in another transport device row, thereby It enables efficient manufacturing without hindering physical distribution. Further, by moving the metal slab by the traversing transport device between the manufacturing equipment row and the transportation equipment row, it becomes possible to secure a distance for holding the required number of metal slabs on the equipment, avoiding interruption of work,
The subsequent processing can be performed continuously.

Further, a full surface ablation device is provided as a surface defect removing device on the second transfer device line on the side of the manufacturing machine line, and then a partial grinding device is provided on the third transfer device line. The material to be surface-inspected by removing surface defects that are detected by the hot surface inspection device of the first transfer device row or scattered on the entire surface, inclusions under the surface or scale of the surface layer of the metal slab is the second transfer device. A predetermined amount of the entire surface of the metal slab is removed by the entire surface ablation device, and is inspected by the surface defect detection device provided in the device line. Further, the remaining surface defects are removed by the partial grinding device in the third transfer device row. The flaws detected by the hot surface inspection apparatus arranged in the first carrier line can be directly supplied to the third carrier line while avoiding the second carrier line.

In the apparatus train which directly connects the continuous casting process and the steel material rolling process, this device train enables removal of surface defects without disturbing the flow of the preceding and following processes while being hot, and the metal slab to be manufactured is manufactured. Can be supplied to the next step while the entire amount is hot.

[0012]

Embodiments of the present invention will now be described in detail with reference to the drawings.

A metal slab having a constant width of 1830 mm manufactured by the continuous casting machine train 1 composed of a plurality of units is introduced into the recuperator 2 at a high temperature of 800 to 1050 ° C. without being cooled. After the temperature distribution in the slab of the metal slab is uniformly processed in the recuperator 2, the slab dimension width 750 to 1830 mm required by the steel material rolling step is rolled by the wide width rolling mill 3. The rolling mill 3 is provided with vertical rolling mills before and after the horizontal rolling mill, and has a production capacity equivalent to or higher than the casting and supply capacity of the continuous casting machine. The surface of the rolled metal slab is inspected for surface defects by the hot surface inspection device 4. Cutting machine 5
After the metal slab is cut and divided into a predetermined length dimension required by the steel plate rolling process, the metal slab having a surface defect tolerance value or less is hot-transferred from the transfer table 6 to the steel plate rolling process 8 via the high-speed transfer carriage 7. To be done. The metal slab whose surface defects on the surface of the metal slab exceed the permissible value is detected as
5 is removed from the first transport device row by the transverse transport device 9a provided on the side of the exit side of 5, and is transported to the second transport device row. In the second carrier row, one side of the metal slab is 1 to 3 m.
There are provided a full-face ablation machine 10 capable of ablating m, a surface inspection device 11 after a full-face ablation, and a carrying table 12a. Traverse transport device 9 provided on the exit side of the second transport device rows 10 and 11
b, metal slab reversing machine 13, metal slab one side 3 to 15
Partial grinding device 14 capable of grinding mm, transport table 12
b, the traverse transport device 9c that connects the third transport device row and the second transport device row, the transport tables 12a and 12b, and the transport table 6
There is a metal slab transfer machine 15 between them.

The metal slab supplied by the traverse transfer device 9a requires the removal of the target material or surface inclusions determined by the hot surface inspecting device 4 to be required to remove surface defects by the full-face shaving machine 10. Target materials, etc. need to be inspected after removing the surface scale. The target metal slab is subjected to surface ablation by the entire surface ablation machine 10, and then surface inspection is performed by a surface inspection device 11, and the metal slab having no surface defect is conveyed by the conveyance table 12a and the conveyance device 15 in the first conveyance device row. It is transported to the table 6 and supplied to the steel plate rolling step 8 as hot.

Surface inspection device 4 arranged in the first transfer device row
The metal slab whose partial surface grinding is required is supplied to the transfer table 12b via the transfer devices 9a, 12a, 9b or from the transfer table 6 via the transfer device 15. Further, the metal slab which has been judged by the surface inspection device 11 of the second transport device row to further need to remove the partial defect on the surface is supplied to the third transport device row by the traverse transport device 9b, and then the reversing machine 13 and the partial grinding are performed. The device 14 removes the surface defects in the required places, and the transport table 12b or 12b, 9
It is conveyed to the conveying table 6 of the first conveying device row by the conveying device 15 via c and 12a, and is supplied to the steel plate rolling step 8 as hot.

The traverse transfer devices 9a, 9b, 9c provided on the side pieces of each transfer device row serve as a storage place for the metal slabs or the surface partial grinding completed slabs supplied to the second and third transfer device rows. It has a function and can work continuously, and can supply all metal slabs to the next steel plate rolling process while still hot.

[0017]

According to the present invention, the removal of the surface defects of the metal slab can be continuously hot-processed entirely on the transfer device row without impairing the production capacity, so that great effects such as facility saving and energy saving can be achieved. Be brought.

[Brief description of drawings]

FIG. 1 is an explanatory plan view showing an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Continuous casting machine row 2 Reheating furnace 3 Wide reduction rolling machine 4 Hot surface inspection device 5 Cutting machine 6 Conveying table 7 High-speed conveying carriage 8 Steel plate rolling process 9a, 9b, 9c Traverse conveying device 10 Full surface lapping machine 11 Surface Inspection device 12a, 12b Conveying table 13 Reversing machine 14 Partial grinding device 15 Transfer machine

Claims (1)

Claim: What is claimed is: 1. In a metal slab manufacturing apparatus line, a transverse transfer device is provided on a side portion on a delivery side of a first transfer device row, which is equipped with a device for inspecting a surface of the metal slab while hot. Is connected to the second conveyor row which can be conveyed in parallel to the first conveyor row, and an apparatus capable of hot-melting the entire surface of the metal slab, and the surface of the metal slab after the welding are inspected. A transverse transportation device connected to the side of the exit side of the second transportation device row, and the surface of the metal slab is heated to a third transportation device row that can be transported parallel to the second transportation device row. A metal slab adjusting device row that is equipped with a device that can partially grind between the first and second transfer device rows, the second transfer device row, and the third transfer device row.