JPS58199601A - Edger - Google Patents

Abstract

PURPOSE:To perform edging of slabs having different thicknesses efficiently by incorporating >=2 kinds of caliber rolls in an edger for edging of a hot strip mill and using the caliber rolls conforming to the thickness of the slab to be rolled selectively. CONSTITUTION:Two sets of caliber rolls 2, 2 and 3, 3 differing in caliber sizes are mounted to an edger, and in the stage of edging of a slab S, the caliber rolls (for example, 2, 2) conforming to the thickness of the slab S is set to meet the width of the slab S. The width of the rolls 2, 2 in this case is roughly set by moving a mechanism 4 for adjusting position with a motor 43 and further finely adjusted with a liquid pressure cylinder 45 until the width of the rolls conforms exactly to the width of the slab S. Another rolls 3, 3 in this case are kept set in the expanded and retreated position. the labor for changing and installing the caliber rolls in accordance with the change in the thickness of the slab is eliminated and the edging of the slabs having different thicknesses is made possible with high working efficiency.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an edger equipped with grooved rolls that can be applied particularly to several types of slabs with different thicknesses in width reduction rolling of a hot strip mill.

In hot strip rolling, as shown in Figure 1), a slab S with a constant width WO is first rolled with vertical rolls to reduce the width of both edges to a width Wl, and at this time, the upper and lower sides of the edge are rolled. The resulting dock bonin b is then level-rolled with horizontal rolls. In this rolling with horizontal rolls, a part of the tok bone b flows to the edge side, so the width return is thick (the slab width becomes W2, and the width killing effect is small).

In order to obtain a torque bone shape that minimizes the flow during horizontal rolling, a grooved roll 1 as shown in FIG. 2 has been used in recent years for narrow width rolling. According to the grooved roll, the toke bone is formed into the shape shown in Fig. 1 (13), and the width W2 after horizontal rolling has a greater adjustment effect than in the case of the flat roll (A). . This means that E during rolling with 1,000 rolls in Figure 3.
This is also clear from the comparison diagram between F and F when rolled with grooved rolls.

As described above, since the use of a grooved roll is extremely effective in the width cutting process, a grooved roll is often used as an edger. However, the thickness of slabs that can be applied to groove rolls is limited by the groove method, and therefore, when applying to slabs of 2+'m or more with different thicknesses, it is necessary to replace the roll each time. was occurring. Therefore, the working efficiency is reduced and the replacement work itself is difficult, so the use of grooved rolls is not necessarily appropriate in some cases, and the advantages of grooved rolling cannot be fully utilized.

It is an object of the present invention to address these drawbacks of conventional hole-type edgers, and to provide an edger that can easily accommodate two or more different slab thicknesses.

The main purpose of the present invention is to incorporate two or more types of grooved rolls into the same housing so that they can be used, and to select only the desired roll having the grooved shape that matches the slab thickness and set it to the slab width. This is because it is configured to perform width reduction rolling.

An embodiment of the present invention apparatus equipped with two types of grooved rolls will be described with reference to FIG. The two types of grooved rolls 2 and 3 are held as a pair on the left and right sides in the width direction of the passage slab, and are held on the same plane in the housing 1.
The set of grooved rolls 2 and the second set of grooved rolls 6 are arranged so that they can press into contact with the edge of the slug S passed through the housing 1 in exactly the same way.

The holding structure of each roll is completely symmetrical on the left and right with respect to the center line, and the holding structures of the first set of grooved rolls 2 and the second set of grooved rolls O are all (similar, so now the first set The holding structure of the hole-type roll 2 will be explained by taking as an example.The roll 2 is rotatably held by a roll holder 21.This holder 21 allows the slug to slide in the edge direction t\ within the housing 1. Position adjustment mechanism 4
have.

The position adjustment mechanism 4 has a screw shaft 41 screwed into the housing on the side, and by rotating this, the holder 21
is slid along the housing. A spline is provided at the rear of the screw shaft 41, and a gear 44 is attached thereto. The gear 44 is rotated by the motor 43, and as a result, the screw shaft 41 is rotated to move the position of the holder 21. In addition to such a coarse adjustment function, a fluid pressure cylinder 45 is provided between the holder 21 and the housing 1, which also provides a function to finely adjust the roll interval.

The roll 2 is also provided with a roll drive unit (not shown) in addition to the position adjustment mechanism 4, so that uniform rotational motion in a symmetrical direction is transmitted to both of the pair of rolls.

The position adjustment mechanism 4 is provided separately for each roll, but the drive motor 43 can be used in common, and in the roll drive unit (not shown), each pair of They may be provided individually for each unit of grooved rolls, or may be provided in common.

In the edger of the present invention configured as described above, a desired set of grooved rolls 2 or 6 is selected according to the thickness of the slab S, and the roll width of the selected roll (filament 2) is adjusted to match the thickness of the slab S. Set to board width.

During the setting, the position adjustment mechanism 4 is moved by the motor 46 for rough setting, and the rolls in the housing are individually finely adjusted by the cylinders 25. The roll rollers that were not selected at this time should be set to the expanded retracted position. Then, the roll drive unit is operated to rotationally drive the rolls, completing preparation for rolling. The roll opening/closing amount in this device may be a percentage of the width, so it is usually about 100 mm.

According to the edger of the present invention, it is possible to quickly select and use a grooved roll that corresponds to the thickness of the slag, making it possible to perform effective width rolling, thereby increasing the production efficiency of continuous casting equipment. Slab inventory can be reduced. The angle θ (see FIG. 2) of the grooved Teno ξ plane in this type of grooved roll is suitably in the range of 3 to 150°, and most preferably 8°.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the process of width reduction rolling. Figure 2 is a sketch of a grooved roll used for width reduction rolling. FIG. 6 is a comparison diagram of the width killing effect when using flat rolls and when using grooved rolls. FIG. 4 is a plan sectional view of an embodiment of the edger according to the present invention. 1: Housing 2, 3 = Hole roll 4: Position adjustment mechanism 5: Roll drive unit S: Slab

Claims (1)

[Claims] A plurality of sets of groove rolls having different groove sizes, a roll holder that rotatably supports the groove rolls, and a housing that supports the roll holder so as to be slidable in the width direction of the slab to be rolled; An edger comprising a position adjustment mechanism that selectively slides the roll holder, and a roll drive unit that selectively drives the slotted roll to rotate.