SU1639815A1 - Device for replacing mill stand rolls with t-shaped pads - Google Patents

Description

one

(21) 4680362/02 (22) 04/18/89 (46) 04/07/1. Bul № 13

(71) Production Association Novokramatorsk Machine-Building Plant

(72) L.I.Odin, V.N.Tiunov and V.P.Ilyin (53) 621.771.2.06 (088.8)

(56) U.S. Patent No. 3,699,796. B 21 B 13/08, 1972.

USSR Author's Certificate number 1444001. class. B 21 V 31/08, 1987. (54) DEVICE FOR CHANGE ROLL CLEAN ROLLS WITH T-SHAPED PILLOWS

(57) The invention relates to metallurgy and can be used to change the rolls of rolling stands. The purpose of the invention is to increase the reliability and simplify the design of the device. The device is equipped with wedge guides 18 and 19, which are supports of the sliders 11 and 12, which provides automatic installation of a set of new rolls at the filling position and simultaneous output of a variable pair of rolls when moving the trolley 5 in the direction perpendicular to the direction of transshipment. The use of the device makes it possible to significantly simplify its design by eliminating the power cylinders and their supply lines. driving the sliders 11 and 12. 4 Il.

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The invention relates to metallurgy and can be used to change the rolls of rolling stands.

The purpose of the invention is to increase the reliability and simplify the design of the device.

Figure 1 shows the device, top view; figure 2 - section aa in figure 1; on fig.Z - the position of the device during handling of the support rolls; Fig, 4 is a section bB in Fig.2,

The device for changing work rolls 1 of a stand with T-shaped pillows 2 consists of a hydraulic cylinder 3 for cutting and filling work rolls mounted on a stand 4, and a carriage 5 moving in a direction perpendicular to the direction of transshipment driven by a hydraulic cylinder b and carrying two pairs of guides 7 and 8 for moving worn and new rolls. The connection of the trolley 5 with the hydraulic cylinder 6 is made in the form of a T-shaped lock, which allows the trolley to move relative to the hydraulic cylinder in the direction of transshipment. The center distance A of the guides 7 and 8 is in the range

l + in

- M C5,

where B is the maximum width of the pillows for 2 rolls, measured along their horizontal wing 9;

b is the width of the pillows along the protrusions 10 for the axial fixation latches (b B).

The trolley 5 is equipped with two pairs of vertically movable sliders 11 and 12, the floor, the zuns 11 are installed along the axes of the guides 7, and the sliders 12 are aligned along the axes of the guides 8. The center distance of the sliders of each pair (measured along the rolls axis) is equal to the axial distance pillows 2 sides transshipment and drive side. The sliders 11 are displaced relative to the sliders 12 in the direction of transshipment to the distance L, slightly longer than the horizontal wings 9 pillows. The upper ends 13 and 14 of the sliders 11 and 12 are adapted to cooperate with the bases 15 of the pillows 2, and the lower ends of the rollers 16 and 17 are mounted resting on the shaped wedge guides 18 and 19 parallel to the direction of movement of the cart 5. The length of the guides 18 and 19 corresponds to the stroke of the carriage 5, and the difference N of levels somewhat exceeds the height h of the horizontal opener 9 of the pillows 2. The guides 18 and 19 are located on the support platform 20 mounted on the guides 21 for reloading the rolls. The directions of the slope of the wedge surfaces of the guides 18 and 19 are opposite.

The device works as follows.

In the initial position (Fig. 2), a set of new rolls is installed on the ends 14 of the raised sliders 12. Then, the hydraulic cylinder 3 removes the worn rolls from the stand onto the guides 7. Since the lift

0 new rolls above the level of guides 7 and 8, determined by the difference of the levels of the wedge guides 18, exceeds the height h of the wing 9 pillows, the wing 9 of the worn set of rolls in

5, the dumping process freely passes under the cushions of the new rolls. Worn rolls removed from the cage to install their pillows 2 above the lowered sliders 11.

After removing worn rolls

0 by the hydraulic cylinder 6, the cart 5 is moved until the guides 8 are installed along the transshipment axis. In the course of the stroke, the slide blocks 11 interacting with the rollers 16 with the guides 18 move out of the carriage 5 and abut

5 butts 13 in the base 15 of the pillows 2 of the worn rolls raise them to a height H above the level of the guides 7 and 8. At the same time, the sliders 12 lower the set of new rolls onto the guides 8. After

0 aligning the axes of the guides 8 with the axis of the cage with the hydraulic cylinder 3 introduce new rolls into the cage.

Thus, the worn rolls are raised to a height greater than the height of horizontal roll pads, and the new rolls are simultaneously lowered to the transfer level during the course of the trolley 5, automatically and without any additional force mechanisms.

When transferring the support rolls, after removing and cleaning from the cart 5 worn work rolls, the cart 5 is installed with a hydraulic cylinder 6 in the middle position

5 (FIG. 3), when the axes of the guides 7 and 8 are located symmetrically on opposite sides of the transshipment axis. Simultaneously with the removal of the support rollers, the platform 20 carrying the carriage 5 is moved away from the stand by

0 guides 21 under plate 4, bringing the carriage out of engagement with the hydraulic cylinder 6, wherein the interaction of the sliders 11 and 12 with oppositely directed wedge guides 18 and 19 provides

5 self-alignment and precise centering of the trolley 5 relative to the platform 20, which facilitates the subsequent connection of the trolley with the hydraulic cylinder b (getting into the lock) when the platform returns to the cage. Self-centering of the cart 5, as well as the lack of pressure disconnection when it leaves the stand, facilitates the maintenance of the device when changing the support rolls. The proposed device allows to increase the reliability and simplify the design of the mechanism of change of rolls by eliminating the system for supplying working fluid and power hydraulic cylinders.

Claims (1)

Apparatus of the Invention A device for changing rolls of a rolling stand with T-shaped cushions, ON With A carriage moving in a direction perpendicular to the direction of transshipment and equipped with sliders for raising and lowering worn and new sets 0 five rolls, means for raising and lowering the sliders, a platform characterized in that, in order to increase reliability and simplify the design, the means for raising and lowering the rolls are made in the form of two pairs of profiled wedge guides mounted on the platform, arranged parallel to the direction of movement of the cart and installed interactions with opposing pillows with the ends of the sliders, while the directions of the wedges' slopes for interacting with the worn-out sliders and the new roll sets are opposed false.