JPS594956A - Burnishing roll for horizontal and continuous casting device - Google Patents

Abstract

PURPOSE:To eliminate cold shot generated on the outside circumferential surface of an ingot without influence on the shape of the ingot and the control for drawing the ingot by rolling down lightly the outside circumferential surface of the ingot cast with a continuous casting device with a burnishing roll. CONSTITUTION:When a driving motor is operated, a body 8 is rotated by a gear. Then, a burnishing roll 15 rolls down lightly the entire outside circumferential surface of an ingot while moving rollably on the outside circumferential surface of the intermittently moving ingot. As a result, the cold shot generated in the surface of the ingot is closed and eliminated. In a foreign matter or the like is stuck on the outside circumferential surface of the ingot 7, the rolling reduction of the roll 15 increases considerably and affects the drawing of the ingot but the abnormal rolling reduction is averted by the effect of a belleville spring 18.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a continuous casting apparatus, and more particularly to a burnishing roll apparatus for a continuous casting apparatus.

In recent years, instead of the vertical continuous casting method in which the slab is pulled out horizontally from the bottom of the mold, a horizontal continuous casting method in which the slab is pulled out horizontally from the side of the mold has been put into practical use.

This horizontal continuous casting method has advantages such as being able to reduce equipment costs compared to the vertical continuous casting method.

In the horizontal continuous casting process, the slab is usually withdrawn from the mold intermittently. ff1J After pulling out the slab for a certain period of time, stopping the drawing for a certain period of time, and then pulling out the slab again for a certain period of time, this is repeated. This prevents the solidified shell in the bait mold from sticking to the inner surface of the mold, and ensures smooth casting. We are trying to pull out one side.

By intermittently pulling the slab out of the mold.

Flaws called so-called cold shuts occur on the surface of the slab.

Conventionally, as a method of eliminating cold shut, there is a method of pressing the surface of the slab with a rolling roll, but this method has the following problems.

■In order to completely remove the cold shut, reduce the pressure f.
If the value is increased, it will be difficult to control the drawing of the slab.

■、Cold shut occurs around the entire circumference of the slab, 6+7
) Qi',: Roll stands for removal by rolling & rolling require considerable space. For this reason, it is difficult to install rolling rolls in a narrow space immediately after the mold.

(2) The shape of the slab is deformed by applying positive pressure.

This invention was made in order to solve the above-mentioned problem, and is provided on the outer periphery of a slab having a circular cross section manufactured by a horizontal continuous casting machine, and is capable of being freely transferred along the outer circumferential surface of the slab. It is characterized by the fact that it is equipped with rolls that can adjust the rolling reduction amount.

The present invention will be described by way of examples with reference to the drawings.

FIG. 1 is an explanatory diagram showing an installation mode of a burnishing roll device of the present invention, FIG. 2 is a sectional view of the burnishing roll device of an embodiment of the present invention, and FIG. 3 is a sectional view of the burnishing roll device of an embodiment of the present invention.

FIG. 4 is a partially cutaway front view of the same part, and FIG. 4 is a partially cutaway plan view of the same part.

In FIG. 1, l is a ladle, 2 is a tundish, 3 is a mold horizontally attached to the lower side wall of the tundish 2, 4 is a burnishing roll device of the present invention provided on the downstream side of the mold 3, and 5 is a kite. 6 is a pinch roll, and 7 is a slab drawn from the mold 3 by the pinch roll 6 and has a circular cross section.

In FIGS. 2 to 4, reference numeral 8 denotes a cylindrical punching roll device provided concentrically around the outer periphery of the slab 7;
Reference numeral 9 denotes a bearing that supports the main body 8 rotatably around the slab axis, 10 a gear fixed to the outer periphery of the main body 8, 11 a drive gear that meshes with the gear 10, and 12 a motor for driving the drive gear 11. , 13 is a burnishing head provided on the main body 8.

14 is a roll mounting member provided in the head 13 so as to be movable in the radial direction of the slab; 15 is a burnishing roll attached to a roll shaft 16 fixed to the tip of the roll mounting member 14 in parallel with the slab 7; .

Reference numeral 17 denotes a screw rod for adjusting the reduction in pressure for pressing the roll mounting member 14 in the direction of the slab via the disc spring 18.

When the threaded rod 17 is rotated, the roll mounting member 14 acts on the disc spring 18 and moves in the direction of the slab. As a result, the burnishing roll 15 comes into contact with the outer peripheral surface of the slab 7.

The pressure force of the burnishing roll 15 is adjusted to the extent that it does not interfere with the control of drawing out the slab 7 by adjusting the amount of rotation of the threaded rod 17.

When the drive motor 12 is operated, the main body 8 is rotated via gears 10°11. by this.

The burnishing roll 15 lightly rolls down the entire outer peripheral surface of the slab 7 while rolling on the outer peripheral surface of the slab 7 that moves intermittently. As a result, the cold shut occurring on the surface of the slab is closed and removed.

If foreign matter is attached to the outer peripheral surface of the slab 7, the roll 15
The pressing force increases to a large +lJ, which affects the drawing of the slab, but this abnormal reduction can be avoided by the action of the plate 18.

In the above embodiment, three burnishing rolls 15 are provided, but it goes without saying that the number of rolls 15 is not limited to this.

As explained above, according to the present invention, the cold shut generated on the outer circumferential surface of the slab is removed by lightly rolling down the outer circumferential surface of the slab cast by the horizontal continuous casting device with a nishing roll. Various useful effects are brought about, such as being able to be removed without affecting slab drawing control and requiring less installation space.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an installation mode of a burnishing roll device of the present invention, FIG. 2 is a sectional view of the burnishing roll device of an embodiment of the present invention, and FIG. FIG. 4 is a partially cutaway front view of the same part, and FIG. 4 is a partially cutaway plan view of the same part. In the drawing. l...Ladle 2...Tandish 3
... Mold 4 ... Vanishing roll 5
... Guide roll Device 6 ... Pinch roll 7 ... Slab 8 ... Main body 9 ... Bearing 10 ... Gear
11... Drive gear 12... Motor
13... Burnishing head 14... Roll'& what member 15... Burnishing roll 16... Roll axis
17... Threaded rod 18... Disc spring applicant Nihon Koukan Co., Ltd. agent Keitabe Tsutsumi (1 person) Figure 2/- Figure 3

Claims (1)

[Claims] Horizontal continuous casting characterized in that a burnishing roll that can be moved freely along the outer circumferential surface of the slab is attached to the outer periphery of a slab having a circular cross section produced by a horizontal continuous casting apparatus, so that the rolling reduction amount can be adjusted freely. Burnishing roll equipment for equipment.