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Connection method and system for hot rolled strip steel endless rolling intermediate billets

A technology of endless rolling and hot-rolling strip steel, applied in metal rolling, metal rolling, manufacturing tools, etc., can solve the problems of slow connection speed and poor reliability of intermediate blanks, achieve fast connection speed and strengthen connection effect , Improve the effect of connection reliability

Pending Publication Date: 2019-08-16
CISDI ENG CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to provide a method and system for connecting hot-rolled strip endless rolling intermediate billets, which are used to solve the problem of slow connection speed and poor reliability of intermediate billets in the prior art. question

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  • Connection method and system for hot rolled strip steel endless rolling intermediate billets
  • Connection method and system for hot rolled strip steel endless rolling intermediate billets
  • Connection method and system for hot rolled strip steel endless rolling intermediate billets

Examples

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no. 1 example

[0054] see figure 2 , is a flow chart of the first embodiment of a method for connecting a hot-rolled strip endless rolling intermediate billet provided by the present invention, including:

[0055] In the above embodiment, that is, in steps S1 to S5, before step S4, it also includes:

[0056] Step SA, using a cooling device to lower the temperature of the tooth-shaped region of the intermediate billet to cool it to 800°C-850°C.

[0057] Wherein, the cooling device can be a high-pressure water descaling device, or other cooling devices, through which the temperature of the end of the intermediate billet with the toothed area is cooled to 800°C-850°C, compared to the other The temperature of the end of the intermediate billet is 950-1050°C. For example, when the temperature of the end of the intermediate billet with the toothed area is cooled to 800°C, the temperature of the other corresponding intermediate billet is 950°C. The temperature of the end of the intermediate blan...

no. 2 example

[0059] see image 3 , is a flow chart of the second embodiment of a method for connecting a hot-rolled strip endless rolling intermediate billet provided by the present invention, including:

[0060] On the basis of the above steps S1 to S5, it also includes:

[0061] Step S6, using the trimmer separation device to complete the trimmer separation before the connected intermediate billet enters the finish rolling mill.

[0062] In this embodiment, the burrs or protrusions extruded from the connecting area of ​​the intermediate billet are removed by the cutting head separation device, so as to ensure that the surface of the connecting area of ​​the two connected intermediate billets can be smooth and flat, which is convenient for subsequent entering into the finishing mill for finishing. rolling to ensure that the subsequent finishing mills are not damaged.

[0063] see Figure 4 , is a schematic diagram of equipment for a connection system of a hot-rolled strip endless rolli...

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Abstract

The invention provides a connection method and system for hot rolled strip steel endless rolling intermediate billets. A crop shear, a shear machine, a high pressure water descaling device, a liftingdevice and a pressure machine are sequentially arranged between a rough rolling machine and a finish rolling machine on a hot continuous rolling production line in the movement direction of the intermediate billets. The method comprises the steps that the ends of roughly-milled intermediate billets are cut to be flush through the crop shear, and the head and tail of every two adjacent intermediatebillets form a flat and straight end face; the shear machine is used for carrying out tooth cutting on the head of the later intermediate billet or the tail of the previous intermediate billet to from a toothed area; high pressure water is used for carrying out descaling on the head and the tail of every two adjacent intermediate billets; the lifting device is used for overlapping one end of theintermediate billet with the toothed area to the end of the other intermediate billet; the pressure machine is adopted for applying pressure to carry out shearing and extrusion on the end of each intermediate billet by means of the toothed area, and the overlapped areas of the front and back intermediate billets are connected together through plastic deformation. By means of staggered engagement of tooth grooves and the intermediate billets, connection reliability is improved.

Description

technical field [0001] The invention relates to the technical field of hot-rolled steel strips, in particular to a connection method and system for hot-rolled steel strip endless rolling intermediate blanks. Background technique [0002] Hot-rolled strip endless rolling technology is one of the most advanced technologies in the world's steel production. It can connect several rough-rolled intermediate billets and continuously enter the finishing rolling unit for continuous and stable rolling. , and is stably cooled and phase-transformed by the laminar cooling line, and finally cut by flying shears and coiled into multiple hot-rolled strip coils by a coiler. Compared with conventional rolling, endless rolling can significantly increase production efficiency and yield, improve strip threading performance, reduce roll consumption, and realize stable production of new products such as extremely thin strips. [0003] However, in the existing endless rolling technology, the conne...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B15/00B21B45/08
CPCB21B15/0085B21B15/0007B21B45/08
Inventor 王万慧韩会全张万里
Owner CISDI ENG CO LTD