JPH0227042B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a cross-roll rolling mill that can smoothly move the slide base horizontally when changing the rolls and horizontally rotate the rolls when the rolls are crossed. .

Figures 1a to 1c are the four-high cross roll rolling mill shown in Japanese Patent Application No. 57-155142 (Japanese Patent Publication No. 63-23843) proposed by the present inventors, and Figure 1a is the conventional example. FIG. 1b is an enlarged side view of a part of FIG. 1a, and FIG. 1c is a view taken along the line A-A in FIG. 1b. These figures 1a to 1c
As shown in FIG. 2, a pair of upper and lower work rolls 2a and 2b that clamp and press the rolled material 1 are rotatably supported at both ends by work roll jocks 6a and 6b, respectively, and are circumscribed by the work rolls 2a and 2b. In addition,
The lower pair of back-up rolls 3a, 3b also have back-up roll yoke 7a, 7b at both ends, respectively.
The roll chock 7a, 7b is formed into a lip channel steel shape, and the work roll chock 6a, 7b is supported at the tip corresponding to the lip.
6b is supported so as to be embraced, and the outer walls of the back-up roll yoke 7a, 7b are connected to the housing 8 through a gap.
installed inside. Also, work rolls 2a, 2b
In order to apply roll bending to the
Roll bending devices 5a and 5b are provided which push the rolls a and 6b and extend upward and downward, while a back-up roll chock 7 is provided to cross the rolls.
Roll cross jacks 13a and 13b are provided to press a pair of upper and lower cross heads 17a and 17b that are in contact with both side walls a and 7b. Further, in order to apply a rolling force, an upper beam 16a is provided which contacts the inner wall of the opening of the housing 8, and is located at the upper end of the back up roll yoke 7a.
This upper beam 16a applies a rolling force to the roll by the rolling down device 11 on the upper part of the housing 8.
On the other hand, a bottom beam 16b is also provided on the lower side of the lower back up roll yoke 7b on a fixed base 22 fastened to the lower part of the housing 8 in the form of a bridge, and is configured to resist the above-mentioned rolling force. A rocker plate 25 and a slide base 14 are interposed between the back up roll chock 7b and the bottom beam 16b, and during roll cross operation, these back up roll chock 7b, rocker plate 25 and slide base 14 are interposed between the back up roll choke 7b and the bottom beam 16b. cross head 17 by jack 13b
It has a structure that allows it to move horizontally in one piece via b. In the figure, 9 is a show plate.

Furthermore, a pair of center rollers 21 are provided at the line center X of the rolling mill to serve as guides when the slide base 14 moves horizontally, and which contact both sides of the slide base 14.
It is rotatably supported by a roller bracket 23 fixed on the roller bracket 2. Also slide base 14
As shown in Fig. 1b and c, the bottom beam 16
Since the slide base 14 is installed so that it can slide smoothly on the top of b (this is operated by the pusher 24), even if roll rearrangement or roll cross operation is repeated, the slide base 14 is always stable and can smoothly move straight forward and backward. The structure allows the required cross angle to be set easily and smoothly.

However, each roll chock 6a, 6
b, 7a, and 7b, it is unavoidable that the roll axis and the roll chock axis become eccentric to some extent due to machining errors during manufacturing or uneven wear on both side walls of the roll chock due to long-term operation. In these cases,
The upper and lower pair of cross points no longer coincide with the longitudinal center of each roll. Therefore, the roll cross jacks 13a, 13b and the cross head 17
If an attempt is made to align the cross point with the longitudinal center of each roll via rollers a and 17b, the slide base 14, which moves horizontally together with the lower roll chock 7b, will be restrained from horizontal movement by the center roller 21. , cannot be implemented.

On the other hand, as a means to suppress step wear caused by the rolled material 1 on the upper and lower work rolls 2a and 2b, the cross points of the upper and lower roll pairs are appropriately moved to both sides of the line center X of the rolling mill to perform rolling shift rolling. or if the roll is to be ground online to remove the stepped wear portion,
That is, it is necessary to roll the upper and lower roll pairs in pressure contact with each other without biting the rolled material 1, and to move their cross points appropriately to both sides of the rolling line center X in the roll axis direction. Also in the case of slide base 1 by center roller 21
Since the horizontal rotational movement of 4 is restricted, Fig. 1a~
There was a drawback that the rolling mill shown in FIG. 1c could not be used.

The present invention has been made in order to effectively eliminate the above-mentioned drawbacks, and its purpose is to correct the position of the cross point of the upper and lower roll pairs due to machining errors such as roll chock and uneven wear caused by operation. Regardless of the misalignment between the axes of the roll and roll chock, roll cross operation centered on the longitudinal center of the roll,
Another object of the present invention is to provide a cross-roll rolling mill that enables online roll polishing, strip shift rolling, etc. by arbitrarily moving the cross point in the roll axis direction, and also enables smoother horizontal movement of the slide base when changing rolls. be.

In order to achieve such an object, the present invention provides a cross-roll rolling mill in which a fixed base provided at the lower end of a housing is supported on a side surface of a fixed base so as to be immovable in the horizontal direction and movable only in the upward and downward directions. The guide plate is characterized in that the guide plates are detachably brought into contact with the lower inner surface of the slide base so as to be located approximately at the center of the line of the rolling mill.

A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 2a is a partially cutaway front view of a rolling mill according to the present invention, FIG. 2b is a side view showing an enlarged part of FIG. 2a, and FIG. A
The arrow view, FIG. 2d, is a sectional view taken along the line BB in FIG. 2b. Components that are the same as those in the conventional device are designated by the same numbers as in FIG. 1, and explanations thereof will be omitted. The lower part of the slide base 14 has a U-shaped concave groove extending along the entire longitudinal length at both ends thereof and forming a pair of protrusions 14b of appropriate height and thickness. A bottom beam 16b is interposed on the fixed base 22 and has a convex surface longitudinally extending through the bottom edge of the portion 14b and slidably engaging a concave surface with an appropriate gap therebetween. The gaps between the sides of the concave portion of the slide base 14 and the convex portion of the bottom beam 16b allow the slide base 14 to freely horizontally rotate integrally with the lower work roll chock 7b during the roll cross operation, and also to provide a guide as described below. The plate 28 is determined so that it can freely move in and out through a slight gap.

On the other hand, the housing 8 is supported by a power device such as a guide 26 and a cylinder 27 fixed to both sides of a fixed base 22 that bridges the lower part of the housing 8 so that it cannot be moved horizontally and can only move upward and downward. A pair of guide plates 28 having an appropriate thickness are attached to the gaps on both side surfaces of the slide base 14 and the bottom beam 16b so as to be removable.

Note that the guide plate 28 has a top portion that is
It descends below the lower edge of the protrusion 14b of the slide base 14 so as not to interfere with the roll cross operation,
When replacing the rolls, the lifting stroke is determined so that the slide base 14 is smoothly horizontally moved in the roll axis direction by the pusher 24 using the respective outer surfaces as guide surfaces, and so as to project into the gap. Also, the strength of the guide plate 28 should be determined so as to be able to support the pushing force against lateral vibration during horizontal movement of the slide base 14, and the guide plate 28 should be installed so that the sides of the bottom beam 16b or the fixed base 22 are in contact with each other. is desirable.

With the above configuration, the cross roll rolling mill according to the present invention can easily and smoothly set the required cross angle at any cross point position during rolling, and can easily and smoothly set the required cross angle at any cross point position during rolling. Online roll polishing work using shift rolling or roll crossing becomes possible, and even if roll rearrangement or roll crossing operations are repeated, the slide base can always be stably moved horizontally in the roll axis direction.

[Brief explanation of drawings]

Figure 1a is a front view of a conventional rolling mill;
Fig. 1b is a side view showing an enlarged part of Fig. 1a, Fig. 1c is a view taken along the line A-A in Fig. 1b, and Fig. 2a is a front view of the rolling mill according to the present invention. Figure 2b is Figure 2a
FIG. 2c is a side view showing an enlarged part of FIG.
It is a sectional view taken along the B line. In the drawing, 2a, 2b are work rolls, 3a, 3
b is a back up roll, 6a, 6b are work roll jocks, 7a, 7b are back up roll yoke, 8 is a housing, 11 is a lowering device, 1
3 is jack, 14 is slide base, 16a,
16b is an upper and bottom beam, 22 is a fixed base, 26 is a guide, 27 is a cylinder, and 28 is a guide plate.

Claims (1)

[Claims] 1 Both ends are rotatably supported by a pair of upper and lower work roll jocks, respectively, and both ends are supported by a pair of upper and lower work rolls that clamp and press the rolled material, and a pair of upper and lower back up roll jocks, respectively. a pair of upper and lower back up rolls that are rotatably supported and circumscribe the work roll; a bottom beam that is located on the lower side of the back up rolls and has a slide base interposed therein; In contact with the walls on both sides of the backpack,
A cross-roll rolling mill comprising roll cross jacks for pressing a pair of lower crossheads, each of which is disposed in a housing, and the lower crossheads are brought into contact with both the lower back up roll chock and the slide base. , a guide plate supported on a side surface of a fixed base provided at the lower end of the housing so as to be immovable in the horizontal direction and movable only in the upward and downward directions is placed approximately in the center of the line of the rolling mill. A cross-roll rolling mill characterized in that the lower inner surfaces of the slide base are respectively brought into contact with and detachable from the lower part of the slide base.