JPS6029562B2 - Cross roll rolling mill - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a four-roll rolling mill in which the cross-sectional shape of a rolled material can be controlled by changing the contact state between a work roll and a backup roll.

In general, in continuous rolling equipment, the cross-sectional shape of the rolled material in the intermediate rolling stage is medium-height, with the central part bulging out a little more than the peripheral part, and in the finishing mill, the central part of the rolled material is pressed more strongly than the peripheral part to produce a flat rolled product. It has been conventional practice to use rolls with crowning as work rolls in finishing rolling mills.

However, devices using such crowning rollers have drawbacks such as the need to replace the roll itself in order to change the amount of crowning, and the crowning changes due to wear.

SUMMARY OF THE INVENTION An object of the present invention is to provide a rolling mill that eliminates the drawbacks of conventional apparatuses and allows continuous adjustment of the cross-sectional shape of a rolled material. An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 indicates a housing of a rolling mill equipped with a gate part 2; 3 and 4 indicate an upper backup roll and a lower backup roll; 5 and 6 indicate an upper backup roll chock and a lower backup roll chock; 7 and 8 are an upper work roll and a lower work roll, 9 and 1 are an upper work roll chock and a lower work roll chock, 11 and 12 are left and right cam blocks with 〈 letter-shaped inclined surfaces, and 13 and 14 are right and left upper parts of a right trapezoid. Cross flocks, 15 and 16 are right-angled trapezoidal left and right lower cross flocks, 17 and 18 are upper cross flocks 13 and 14 and upper work roll chock 9.
Roll pending cylinders 19 and 20 are roll pending cylinders 21 and 22 provided between the lower cross flocks 15 and 16 and the flange parts of the lower work roll chock 10.
24 is a hydraulic cylinder for swinging the balance beam 23, and 25 is a rolled material.

In such a device, the balance beam 23 or the horizontal (
1), the cam blocks 11, 12, cross blocks 13, 14, 15, 16, and work roll chocks 9, 10' are at the dotted line positions, and the work rolls 7,
8 is located at the center (dotted line position) and its roll axis is parallel to the roll axes of the backup rolls 3 and 4.

In this state, the upper work roll 7 and the lower work roll 8
The distance between them is uniform. Next, when the balance beam 23 is moved to the solid line position in FIG. 1 by the hydraulic cylinder 24, the cam block 11 is pushed down by the rod 21, and the rod 2
2, the cam flock 12 is pulled down (solid line position) to the upper cross flap.

blocks 13 and 14 move to the left, lower cross block 1
5 and 16 move to the right. (solid line position). Therefore the upper work. The end of the roll 7 moves to the left, and the end of the lower work roll 8 moves to the right and assumes the solid line position. The housings 1 are provided at both ends of the rolls 3, 4, 7, 8, and the movement directions of the work roll chocks 9, 10 within each housing 1 are opposite, so the upper work roll 7 and the lower work roll 8 are separated from each other as shown in FIGS. As shown in FIG. 4, they intersect in opposite directions with respect to the roll axes of the backup rolls 3 and 4, respectively.

When the upper work roll 7 is pressed against the upper backup roll 3 by the roll pending cylinders 17 and 18 and the lower work roll 8 is pressed against the lower backup roll 4 by the roll pending cylinders 19 and 20, each work roll 7 and 8 is pressed against the backup roll 3. . The swollen supply-side rolled material becomes a rolled product with a uniform thickness.

The intersection angle of commonly used work rolls 7 and 8 is 0 to 4.
By changing this intersecting angle, the interval between the work rolls 7 and 8 can be adjusted and the cross-sectional shape of the rolled product can be controlled. In the embodiment of the present invention, a cam block moving means for moving the cam block using a lever bar and a rod is used, but a cam block moving means for moving the cam block up and down using a threaded rod may be used instead of the rod.

[Brief explanation of drawings]

Fig. 1 is a front view of the housing showing an embodiment of the cross-roll rolling mill of the present invention, Fig. 2 is an A-A view of the same as above, and Fig. 3 shows the backup roll and work roll of Fig. 1 taken out. The drawing, FIG. 4, is a view taken along the line B-B of the same as above. 1... Housing, 3, 4... Backup roll, 7
, 8... Work roll, 9, 10... Work roll check, 11, 12... Force block, 13, 14, 15
, 16... Cross flock, 21, 22... Rod, 2
3... Balance beam. Figure 2 Figure 4 Dance Figure 3

Claims (1)

[Claims] 1. In a roll rolling mill equipped with a set of work rolls that sandwich a rolled material and a set of back-up rolls provided on the outside of the work rolls, a set of cam blocks with a dogleg-shaped inclined surface is rolled. A pair of right-angled trapezoidal upper cross blocks are provided on the sides of the opening of the machine housing so as to be slidable up and down, and a pair of right-angled trapezoidal upper cross blocks are installed between both sides of the upper work roll chock and the upper half of each cam block on each contact surface. A pair of right-angled trapezoidal lower cross blocks are placed between both sides of the lower work roll chock and the lower half of each cam block on each contact surface. A cross roll rolling mill characterized in that the cross blocks are arranged to be slidable and the cross blocks themselves are movable in the horizontal direction, and are provided with cam block moving means for moving one of the cam blocks upward and the other downward.