JPS6323841B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in cross-roll rolling mills. In recent years, requirements for thickness accuracy in the width direction of rolled products have become increasingly strict.Currently, this is countered by adding an initial crown to the rolls to cancel the pinching of the rolls due to the rolling load. When rolling conditions such as sheet width and thickness change drastically, it is necessary to keep and replace rolls with many different types of initial crowns, which leads to a decrease in operating efficiency due to roll replacement. Furthermore, since the crown of the roll changes due to wear and thermal expansion of the roll as the rolling process progresses, there has been a need for a means to control the thickness shape of the rolled plate in the width direction without replacing the roll.

Therefore, as a control method, a work roll bending method has been developed and has shown some success, but with this method, there is a limit to the bending that can be applied to the work roll due to the strength of the roll neck of the work roll. It is not possible to obtain sufficient ability to correct the thickness shape in the width direction, and especially when the width of the rolled material is narrow relative to the roll length, the contact areas at both ends of the back-up roll and work roll become a hindrance. The desired effect cannot be fully exerted.

Therefore, in order to eliminate the above-mentioned drawbacks of conventional rolling mills, the present applicant has developed a technology that enables control of the thickness shape of a rolled plate material over a wide range of width directions using the same roll, and that also extends the life of the rolls. Specifications and drawings of Japanese Patent Application No. 53-138837 (Japanese Unexamined Patent Publication No. 55-64908) and Japanese Patent Application No. 54-59327 (Japanese Unexamined Patent Application No. 55-153605) as a rolling mill that can be extended more than twice as long as the conventional one. 4 shown in
Developed a corrugated rolling mill.

These rolling mills are designed so that the upper roll and lower roll intersect each other at the required angle with respect to a line perpendicular to the rolling direction. was able to achieve this.

Furthermore, as a mechanism for crossing the upper and lower rolls as described above, we have developed a specific mechanism as shown in the specifications and drawings of Japanese Patent Application Nos. 55-32612 and 1987-32613.

In these mechanisms, the roll jocks of the upper roll and lower roll are rotated in the same horizontal plane using a vertical axis as the rotation axis by a jack attached to the housing or a pedestal provided in the housing, and the upper roll and lower roll are rotated in the rolling direction. It is made to cross each line perpendicular to the line.

Figure 1 shows the patent application developed by the applicant in 1982.
It is a cross mechanism of the four-high rolling mill of No. 32613, and in the figure, 8 is a housing, 20, 20' are pedestals,
13a, 13b, 13c, 13d, 13a', 13
b', 13c', 13d' are jacks, 6, 7 are roll jocks for the upper rolls, and 6', 7' are roll jocks for the lower rolls, and the above-mentioned mechanisms are provided on both ends of the rolls, respectively. .

Therefore, the jacks 13a, 13b...13d' are operated to move the jacks 6, 7, 6', 7' back and forth in the rolling direction A, and the upper rolls 2, 3, lower rolls 2',
3' can be crossed.

However, each of the jacks 13a, 13b...13
In addition to the roll movement role of crossing the upper roll and lower roll, d′ is also required to have the following functions.

(b) A function that holds the upper roll and lower roll in place.

(b) A function to support the positive or negative horizontal force generated in the rolling direction of the rolled plate against the upper roll and lower roll during rolling.

(c) The upper roll and lower roll also need to move vertically under the above conditions (a) and (b) when setting the rolling reduction amount and during operation, and this is a function to obtain appropriate clearance between each jack and roll chock.

(d) The upper roll and lower roll rotate in a horizontal plane around the center, and the jack surface of the roll chock is inclined with respect to the jack, so the function is to press and support the inclined surface with the jack head.

etc. are required. Therefore, considering the functions (a), (b), (c), and (d) above, it cannot be said that the roll crossing mechanism shown in FIG. 1 can sufficiently fulfill these roles. Furthermore, simply pressing the surface of the roll chock with the head of the jack is mechanically insufficient, and there are also problems in terms of stability, durability, and maintenance management of the equipment.

The present invention relates to an improvement of a cross-roll rolling mill having the above-mentioned problems, and involves displacing the roll chock of the rolling mill in the rolling direction so that the angle formed by the roll axis with respect to the rolling direction is slightly less than a right angle in a horizontal plane. In a rolling mill that has rolls that can be tilted, tuning beams that are placed along the front and back sides of the rolls and roll jocks in the rolling direction and sandwiching the roll jocks are pivoted at the rolling center line, and both tuning beams are tilted at slightly equal distances. Pressing means for turning are installed on the front and rear sides of the rolling direction,
The feature is that the roll is given a cross, and its purpose is to move both ends of the roll by equal amounts in exactly opposite directions, and to firmly support the roll in the cross position. The object of the present invention is to provide a cross-roll rolling mill that is stable and stable.

The present invention has the above-mentioned configuration, in which a tuning beam arranged along the front and back sides of the roll and roll chock in the rolling direction so as to sandwich the roll chock is pivoted at the rolling center line portion, and both tuning beams are rotated by a slightly equal amount. Since pressing means are provided on the front and rear sides in the rolling direction, the pressing means allows both tuning beams to pivot by the same amount in precisely opposite directions at both ends of the beams around the pivot point on the rolling center line. , and the roll chock held between both tuning beams can be directly swiveled to move and position the rolls at the required exact cross position with respect to the rolling center line, and the tuning beams do not move during the rolling operation. Since a beam is interposed and the head of the jack is brought into contact with the tuning beam surface, a means such as an uneven arcuate surface is applied to the head of the jack and the surface of the tuning beam so that the contact area does not always change even if the jack is tilted. This makes it possible to firmly press and fix the tuning beam with the jack head, and at the same time, since the roll yoke is directly supported by the tuning beam, the roll is firmly supported and stabilized.

Further, although the roll is stabilized as described above, it is possible to move in the vertical direction when setting the rolling reduction amount and during rolling operation.

An embodiment of the present invention will be described below with reference to FIG. FIG. 2 is a plan view of the upper roll 3 in FIG. 1, and 8a, 8b, 8c, and 8d are housings disposed on both sides (drive side, work side), front and rear sides in the rolling direction A; 3 is a roll, 71a and 72b are separators provided between housings 8a and 8c on both sides and between 8b and 8d, and 72a and 72b are roll chocks placed along the front and back sides of the roll 3 and roll chocks 7a and 7b on both sides in the rolling direction. The tuning beams 72a, 72b are pivotally connected to the separators 71a, 71b by vertical pins 74a, 74b in the rolling center line area.
Both ends can be turned back and forth in the rolling direction with 4a and 74b as centers.

Further, jacks 73a, 7
3b, 73c, and 73d are the housings 8, respectively.
a, 8b, 8c, 8d directly or indirectly, and slide blocks 75a, 75b, 75c, 75d disposed at the tip of each jack are structured as jack heads in contact with both sides of the tuning beams 72a, 72b. ing. Note that the tip of the slide block is formed into a convex spherical surface and is in contact with the tuning beam surface.

In the above, only role 3 was explained, but
The other rolls in FIG. 1 have similar structures.

Since the embodiment of the present invention has the above-described structure, when the oppositely arranged jacks 73a...73d are expanded and contracted by the same amount in opposite directions, the slide blocks 75a...75d are moved. , both tuning beams 72a, 72b are equally pivoted by a small angle α about pins 74a, 74b located on the rolling center line. Roll check 7a,
Since the beam 7b is sandwiched between the tuning beams 72a and 72b, it is rotated in the same manner as the tuning beams.

Therefore, by moving each jack 73a...73d by the same amount in opposite directions,
The roll 3 can be given an inclination α in a horizontal plane from a direction C perpendicular to the rolling direction A. Moreover, by giving an opposite inclination α to another roll (not shown) provided opposite to the roll 3, both rolls can be placed in a cross position.

The embodiment is as described above: (a) By keeping the extension of each jack constant, the tuning beam can be fixed in a fixed position and the roll having a roll chock can be held in a fixed position.

(b) Each jack is firmly fixed directly or indirectly to the housing of the rolling mill, so the rolling horizontal force generated on the rolls is supported by the housing via the roll chock, tuning beam, and jack.

(c) In the embodiment shown in Fig. 2, a plan view of one roll is shown and only that roll is explained.
By installing another roll above or below that roll, providing a similar cross mechanism, and slightly tilting the upper roll and lower roll in opposite directions within a horizontal plane, a roll cross can be created between the upper roll and lower roll. can give.

(d) Since the roll chock is in surface contact with the tuning beam and is sandwiched from both sides, it is reliably held stably.

(e) By making the tip of the slide block a convex spherical surface, it is possible to stably support the tuning beam even if it is slightly tilted.

(f) Since the synchronized beam is rotated around a pin located on the rolling center line, both sides (work side part, drive side part) are reliably moved by a fixed amount in opposite directions, and the rolls are rolled. Accurate cross position relative to the line.

(g) The roll between the tuned beams can move in the vertical direction.

Although the present invention has been described above with reference to embodiments, it goes without saying that the present invention is not limited to such embodiments, and that various design modifications can be made without departing from the spirit of the present invention. .

[Brief explanation of the drawing]

Figure 1 is a side view of a conventional cross roll rolling mill.
FIG. 2 is a plan view of the cross roll rolling mill of the present invention. 3: Roll, 7a, 7b: Roll check, 8
a, b, c, d: housing, 71a, b: separator, 72a, b: tuning beam, 73a, b,
c, d: jack, 74a, b: pin, 75a,
b, c, d: slide block, a: rolling direction,
B, B′: Roll axis center, C: Rolling center line.

Claims (1)

[Claims] 1 Displace the roll chock of the rolling mill in the rolling direction, and adjust the angle formed by the roll axis with respect to the rolling direction.
In a rolling mill that has rolls that can be tilted slightly from a right angle in a horizontal plane, a tuning beam is placed along the front and back sides of the rolls and roll jocks in the rolling direction, sandwiching the roll jocks, and is pivoted at the rolling center line. A cross-roll rolling mill characterized in that pressing means for slightly turning the beam by an equal amount are provided on the front and rear sides in the rolling direction to give a cross to the rolls.