JPS5841603A - Rolling device - Google Patents

Abstract

PURPOSE:To decrease the quantity of crop losses produced in the preceding and succeeding end parts of materials to be rolled by driving a pair of vertical rolls and a pair of horizontal rolls which intersect orthogonally with rolled materials and of which the axial centers are disposed on the same plane thereby rolling the materials to be rolled. CONSTITUTION:Vertical caliber rolls 1, 1a are equipped in housing 8. A lower horizontal roll 6 is equipped in housing 9 and upper horizontal roll 6a in housing 10. These rolls are so disposed that the rolls intersect orthogonally with a slab 3 and their axial centers are on the same plane. The slab 3 is guided by table rolls 12 and advances in an arrow direction. The slab is bitten into two pairs of rolls 1, 1a and 6, 6a driven respectively by driving devices, and compressive stresses are applied on the slab 3 by these rolls, whereby the slab is rolled in thickness and width directions simultaneously. According to said rolling method, the quantity of crop losses is decreased by 30-50% as compared with a conventional rolling method.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a drawing device 111 that can simultaneously roll a slab to be rolled in the width and thickness directions during hot rolling of the slab.

In hot rolling of slabs, as is well known, the portion near the surface of the slab to be rolled is well rolled and elongated, resulting in the formation of two plates called fishtails at the front and rear ends. For this reason, it becomes necessary to cut and remove the leading and trailing ends of the rolled slab, resulting in wasted material (hereinafter referred to as crop loss).

A number of methods and devices for reducing such lop loss have been proposed in the past, and it is easy to list some examples.

(Re) How to optimize the rolling schedule
This is a method to reduce crop loss by appropriately combining convex deformation caused by rolling in the thickness direction with horizontal rolls, but depending on rolling conditions such as slab dimensions, finished strip dimensions, mill capacity, number of rolling passes, etc. There are inevitably limits.

(2) A method for optimizing the shape of the slab before rolling.By chamfering the front and rear ends of the slab in the width direction before rolling, it is possible to reduce the crop loss mark. Not only does this require specialized equipment, but gas cutting also reduces yield.

(3) Rolling method using convex crown rolls Before width rolling with vertical caliber rolls, the front and rear ends of the slab are rolled into a convex shape using rolling rolls with convex crowns to reduce the occurrence of fishtails during subsequent width rolling. However, the rolling mill that incorporates the crown is the same size as a rough rolling mill, and the equipment cost is high.

In order to solve the conventional problems such as upper ml, the present invention drives a pair of vertical rolls and a pair of horizontal rolls that are orthogonal to the rolled material and whose axes are arranged on the same plane. This equipment provides a rolling equipment for rolling materials, and eliminates crop loss that occurs at the leading and trailing ends of rolled materials for other purposes. It? i- It is used for the purpose of decreasing.

Below is the figure 1 River J: Rihon 96 Akira (11-Explain 1, 1st
The figure is a half-1 diagram of the embodiment of the present invention, the second figure is a front view thereof, the sixth figure, the AA sectional view in figure 1, the 11th figure in figure 4 and 2.
111'! Make a paper with f+i IZI. In the figure 1,
1a is a vertical caliber roll arranged facing each other at a constant interval.A gear 2.2a has an iron layer σ on both sides or one side in the vertical direction.This gear 2, Idle gears 4, 4a are meshed with 2a and tj, respectively, and the teeth 4L2, 2a are driven by a drive device (not shown) to a spindle 11. lla, the human power 11M1I5, 5a and the idle chain wheel 4.4a are activated.The caliber rolls 1, 1a are moved in the width direction of the slab 6.
The idle box cars 4, 4a are configured to move following the caliber rolls 1, 1a.

'6, 6a are a pair (1) of horizontal rolls that roll the slab 6 (in the direction of thickness); Arranged on V plane -C, horizontal roll ill/+7
is driven by a drive device (not shown) via a.

Note that this horizontal roll 6.6a is configured to be able to adjust its position in the thickness direction of the slab 6.

In each roll configured as described above, the vertical caliber rolls 1, 1a are attached to the housing 8, the lower horizontal roll 6 is attached to the housing 9, and the horizontal roll 6a is attached to the housing 10&? ':Each device is independently installed.
By combining these six housings 8, 9.degree. 10, one 11-sannobu device is constructed.

The uninvented j]--the same device configured as above,
Now, the slab 3 is inserted into the table roll 1, moves in the direction of the arrow, and almost simultaneously reaches the caliber roll 1.1a and the horizontal roll 6.6a, respectively.
two pairs of rolls 1.1a and 6, which are moved in y by one head;
6aK biting, compressive stress is applied to the slab 6 by these rolls 1.1a and 6.6a, and rolling is performed simultaneously in the thickness direction and in the direction of depression.

According to the experiment VC by Akinagi et al., when a slab was rolled by the rolling device a of the present invention, the amount of fishtail generation was halved, and the amount of crucible loss was reduced compared to when using the conventional rolling device Ut. 1'C reduction by 60-50% was achieved with 1 approval.

The rolling apparatus α according to the present invention may also be used as a double horizontal rolling machine or an edger.1 However, the configuration of the present invention is not limited to the above embodiments. For example, it goes without saying that a power transmission means that uses a combination of a gear and a friction wheel may be modified without departing from the spirit of the present invention.

As is clear from the explanations given below, the invention can produce remarkable effects as described below.

(1) The amount of fishtails that occur at the front and rear ends of the rolled slab is halved, and the amount of crop loss is reduced, so the yield is significantly improved compared to the conventional rolling mill.

(2) Since the vertical caliber roll and the horizontal roll are arranged in the same place directly in one rolling mill, the length of the mill is significantly shortened in the direction of slab flow. This requires less equipment space and reduces equipment costs.1
,

[Brief Description of the Drawings] Figure 1 is a half view of an embodiment of the present invention, Figure 2 is a front view thereof,
FIG. 6 is a cross-sectional view taken along line A--A in FIG. 1, and FIG. 4 is a side view of FIG. 1.1a: Vertical caliber roll 2, 2,
: Gear, 6: Caliba, 4,4a: Idle gear,
6゜6a: Horizontal roll, 8, 9, 10: Housing. Agent Masuji Sato Masatoshi Figure 1-aO+ Figure 3 Ward 4 11-

Claims (1)

[Claims] A rolling device d characterized in that a rolled material is rolled by driving a pair of vertical rolls and a pair of horizontal rolls, which are perpendicular to the rolling direction and whose axes are disposed in the same flat-concave manner.