JPS6040932B2 - Side guide for strip rolling using horizontal flat rolls - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a side guide for rolling a strip using horizontal flat rolls.

Strips, such as bars, wires, etc. of bar steel and other non-ferrous metals (
For rolling (hereinafter simply referred to as strip material), a secondary hole type roll has generally been used.

However, the grooved roll has the following problems.

Not only is caliber processing inherently difficult, but there is also the risk of roll breakage, so the initial roll diameter must be made thicker, and there are severe disadvantages such as the need to have a large number of rolls for a wide variety of rolling sizes. It requires troublesome roll rearranging, and in doing so, downtime is unavoidable for adjusting the centering between the caliber flanges of each roll and between the entry and exit guides.
It takes a lot of time to clean the grinder due to damage and friction in the caliber, the amount of reduction at the corner of the caliber is particularly large, which increases the amount of fishtail cut off, and resistance to deformation within the caliber. is high, so the power cost also increases, especially the wear of the caliber,
Since the cutting cost for the repair work is added and the hole contour is expanded, it is impossible to at least restore it to its original size.

By the way, the use of so-called flat rolls, or plain rolls, which have roll arms made of a simple cylindrical surface without a caliber, in place of the grooved rolls that have been used in the rolling of long steel, means that, for example, the rolls can be arranged horizontally and vertically. JP-A-56-17112 related to the rolling mill train that became
It is disclosed in the publication No.

However, in this case, although it is mentioned that the side guide interval is adjusted in accordance with the rolling reduction amount of the rolling rolls, considering the example of application to vertical rolls in the example, There is no mention of extending the life of the rolls by equalizing the wear in the axial direction, and of leading to grinding and repair of the roll cylinders without changing the size of the rolled material.

The inventors discovered that during conventional grooved roll rolling, the guides used on the entry side or on the entry and exit sides are directed exclusively toward the caliber of the slotted roll at a position far away from the roll gap. The caliber flanges were used to control the guidance of the material to be rolled, and the caliber flange was used to restrain the material from folding (making the rolled cross section into a parallelogram) and twisting.

Rolling of long strips using rolling rolls lacks a means to hold the material to be rolled in the roll gap, and it was revealed through rolling experiments on an actual operational scale that this has a significant effect on the rolling process. The horizontal roll provides effective support to the side surface of the rolled material through the roll gap, and also contributes to a significant extension of roll life by effectively dispersing unavoidable wear on the roll eye of the roll in all directions of the roll axis. We have developed the following configuration for side guides for strip rolling using flat rolls. This invention provides a pair of guide plates that pass through the roll gap of a rolling horizontal flat roll having a roll arm made of a cylindrical surface and are spaced apart in the axial direction of the roll body between the entrance and exit sides. Each side guard of both side manipulators is individually hinged with a vertical pin, so that the inner distance between the guide plate and the side guard can be variably set at any position along the center of the roll cylinder. This is a side guide for rolling strips using horizontal flat rolls. The guide plate of the side guide according to the present invention penetrates through the roll gap and secures the rolling section over a predetermined width, so that the rolling section is advantageously realized with flat rolls without sagging or twisting. This method not only effectively eliminates all of the above-mentioned problems associated with this type of rolling using slotted rolls, but also particularly improves the inner spacing at any position along the koji center direction of the roll cylinder.
Due to the variable setting of the side guards of both the input and output manipulators, the entire surface of the horizontal flat roll 8 should be utilized as the rolling operation surface under the distributed selection of the rolling width sections of the roll 8. The service life of each rolling roll is significantly extended.

Flat rolls are originally extremely easy to repair, and can be easily repaired by grinding, and can be easily applied to existing conventional rolling mill arrangements of this type. Now, FIGS. 1 and 2 show a horizontal flat roll according to the present invention. Guide plates 5, 6 extending through the roll gap on the input and output sides thereof, and side guards 17, 19, 18, 20 of the manipulators 15, 16 that guide the rolled material at the input and output sides of the horizontal rolls.
An example of the side guide 7 is made of a square bar with an 80 willow width, a 115 skin width, and a 145 side width, an outer diameter of 75 to 85 ribs, a 90
The first stage mill for bar rolling, which produces round bars of approximately 10 and 11 mm, is shown, in other words, the case where rough rolling is carried out by alternating forward and reverse feeding of the rolls. In the figure, 1 and 1' are horizontal flat rolls for rolling having a roll body with a cylindrical surface, 2 is a chock thereof, 3 is a mill housing, and 4 is a table loaf.

In the present invention, a pair of guide plates 5, 6 passing through the roll gap of the horizontal flat rolls 1, 1' for rolling and extending between the entry and exit sides thereof are placed at any position in the roll gap along the axial direction of the roll edges. At, input and output side manipulator 15
, 16 and the side guards 17, 19, 18, 20, the wear of the roll cylinders of the horizontal flat rolls 1, 1' as strip rolling progresses can be uniformly reduced over the width direction. This makes it possible to significantly extend the service life of each roll chance.

Here, the guide plates 5 and 6 each have notches 7 and 8 corresponding to the roll gap of the horizontal flat rolls 1 and 1' for rolling.
A reinforcing rib 1 in the longitudinal direction is placed on the back of the flat plate 9 that has been hollowed out.
0 and 11, and a number of reinforcing plates 12 connecting them can be welded, and yoke ends 13 and 14 with holes are fixed to both ends, respectively.

These guide plates 5 and 6 are connected to the yoke ends 21, 22 and 23 of the push side and pull side side guards 17, 18 and 19, 20 of both the inlet and outlet manipulators 15, 16, which are attached to the mill housing. 24
, and are hingedly connected using a vertical mari pin 25.

The input and output manipulators 15 and 16 are, for example, as illustrated in FIG. 3 for an example of a mechanical synchronous drive operation system.
A pinion in which input and output side guards 17, 18 and 19, 20 are fixed to pinion shafts 30, 33 by push side rams 26, 27 and pull side rams 28, 29, respectively, on the push side and pull side. By engaging the rack with the rack, the guard gap can be individually adjusted in a synchronous manner.

In the figure, 34 is a relay shaft provided as necessary, and 35 and 36 are drive motors. Here each side guard 17, 18 and 1
A pair of guide plates 5 and 6, which are hinged to each other by vertical ball pins 25, divide rolling sections according to the width of the material to be rolled at arbitrary positions in the longitudinal direction of the roll cylinder. It is possible to do this.

The synchronized drive operation system of the input and output manipulators 15 and 16 can also be electrically synchronized using, for example, a Selsyn motor.

As described above, according to the present invention, the wear allowance generated on the roll chest of horizontal flat rolls for rolling is equalized, resulting in significant benefits in extending the service life of each roll chance, and also reducing the number of rolls owned. Coupled with this, the roll consumption rate has been significantly reduced to approximately 1/10 compared to conventional grooved rolls, and the operating rate has been reduced by approximately 3 to 4%, as the labor of changing rolls and adjusting the center of the roll is eliminated. Furthermore, the crop shape is improved by eliminating fish tails due to the strong reduction especially in the corners with the grooved rolls, and the yield is increased by about 15%. In addition to its unique benefits in rolling materials, it also prevents sagging and twisting.
It can be reliably realized under any rolling width, and its operation can be performed easily.

[Brief explanation of the drawing]

1 and 2 are a plan view and a sectional view on a rolling line showing an embodiment of the present invention, and FIG. 3 is an explanatory diagram of an operating system. 1,1'...Horizontal flat roll for rolling, 5,
6... Guide plate, 1 6, 1 6...
・Manif. Rator, 17, 19, 18, 20"" Side guard, 25... Vertical shaft pin. Fig. 1 Fig. 2 Fig. 3

Claims (1)

[Claims] 1. A pair of guide plates 5 passing through the roll gap of the horizontal flat rolls 1, 1' for rolling strips having a roll body with a cylindrical surface and leaving a gap in the axial direction of the roll body between the input and output sides. 6, the horizontal flat roll 1,1
Manipulators 15 and 1 installed on the inlet and outlet sides of '
6, and insert each guide plate 5, 6.
Each side guard 17 of both exit side manipulators 15, 16,
19, 18, and 20, respectively, with vertical shaft pins 25, and thereby the guide plate 5
, 6 and the inner intervals of the side guards 17, 19, 18, 20 can be variably set at any position along the axis of the roll cylinder. .