SU1178514A1 - Rolling stand - Google Patents

Abstract

ROLLED STEEL containing a bed, support rolls, work rolls with support bearings placed in pliers mounted in the bed and thrust support plates located in housings and fixed axially on the work roll notches on the side of the transshipment side, hydraulic cylinders of the axial displacement and fixation device installed in the horizontal plane, the plungers of which are connected to the bearings of the thrust bearings by means of spherical hinges, push, anti-bend and balancing devices VA, as well as sensors measuring the axial movement of the work rolls, characterized in that, in order to increase the service life of the rolls, increase the accuracy and quality of rolled products by increasing the stroke of the work rolls in the axial direction during the pauses between rolling and reliably fix them during rolling, hydraulic the cylinders of the axial movement and fixation device of each working shaft (L ka are fixed on the thrust bearing housing.

Description

00

ate

The invention relates to rolling production and can be used in the construction of work stands, mainly sheet mills.

The purpose of the invention is to increase the service life of the rolls, increase the accuracy and quality of rolled products by increasing the stroke of the work rolls in the axial direction during the pauses between the rolling and reliable fixation during rolling.

FIG. 1 shows a rolling stand, general view; in fig. 2 shows the device for axial movement and fixation of the work roll of the rolling stand (enlarged view).

The rolling stand (Figs. 1 and 2) comprises a frame 1, support rolls 2, work rolls 3 mounted in support bearings 4 arranged in pillows 5 which are fixed in the frame, and thrust bearings 6 in housings 7 arranged and fixed in axial direction the direction on the necks of the work rolls on the transfer side, hydraulic devices 8 for axial movement and fixation of work rolls 3, a pressure device 9, a balancing device 10, sensors 11 and 12 for axial movement, while hydraulic device 8 for axial movement and fixation each The second work roll 3 contains two hydraulic cylinders 13 and 14, which are mounted in a horizontal plane and fixed to the thrust bearing casing 7 parallel to the horizontal axis of the rolls 3, and the plungers 15 of each of the cylinders 13 and 14 are connected to the pillows 5 of the thrust bearings 4 through a spherical joint 16 .

The rolling stand works as follows.

Before the rolling pressure device 9, the necessary clearance between the work rolls 3 is established. With the devices 8, axial movement and fixation, the work rolls 3 are shifted in opposite directions to a predetermined value depending on the width of the rolled strip. For this purpose, the hydraulic drive of the cylinders 13 and 14 of each of the axial movement devices (separately for the lower and for the upper work rolls 3) is included.

Under the pressure created in the cavity of the cylinders 13 and 14, which are fixed to the housing 7, the work roll 3 is moved relative to the support bearing 4 to a predetermined position, monitored by the position sensor 12.

The force generated in the cylinder bores 13 and 14 is transmitted to the work roll 3.

through the housing of the thrust bearings 6, which are rigidly fixed on the cheeks of the work rolls 3. The plungers 15 of the cylinders 13 and 14 are rigidly connected to the pillows 5 through the spherical hinge 16, which are fixed axially relative to the base 1 and remain stationary, and the movement of the roll 3 is carried out together with the housing 7, in which the thrust bearing 6 is installed, and the cylinders 13 and 14 fixed on it. During the rolling process, elastic bending of the rolls 2 and 3 takes place, as a result of which the plunger 15 is tilted relative to the cylinder 1 4 is prevented by a spherical self-aligning hinge 16. Moving the roll 3 relative to the pillow 5 with the support bearing 4, which are fixed axially relative to the bed 1, does not change the relative position of the pillows 5, and therefore the movement of the rolls 3 does not

0 is reflected in the work roll bending work.

To move the work roll 3 in the thrust bearing 4, obstacles are interrupted, since in all existing structures the shaft-bore mating is made by easy-fit fit.

Mutual movement of the work rolls 3 relative to each other is carried out according to the program, depending on the specified rolling program according to the width nomenclature

0 and the thickness of the finished strips. In this case, the movement of the work rolls 3 is carried out in pauses between rolling. The direction of movement is also selected on the basis of the rolling program to ensure the reduction of wear and tear (development) of the rolls under the strip and is accomplished by switching the supply of pressure in the cylinder cavities. The rolling stand offered in comparison with the best samples of similar equipment has an increased reliability of work when the rolls are moved and their fixation in the axial direction. In addition, the axial displacement limits are 1.5 times larger compared to the prototype design.

Use of the proposed rolling

 The stands allow an increase in the service life of the mill rolls by reducing uneven wear along the length of their drum. For example, for a continuous wideband mill “2000 hot rolling life

Q work rolls finishing group with the introduction of the proposed design of the cage increased by 30-35%.

(Reg. 2

Claims (1)

ROLLING CELL, containing the bed, backup rolls, work rolls with thrust bearings located in the pillows installed in the bed and thrust bearings located in the housings and axially mounted on the necks of the work rolls from the transshipment side, hydraulic cylinders of the axial displacement and fixing device installed in the horizontal plane, the plungers of which are connected to the pillows of the thrust bearings by means of spherical joints, pressure, anti-bending and balancing devices, and There are also sensors for measuring the axial movement of work rolls, characterized in that, in order to increase the service life of the rolls, to increase the accuracy and quality of rolling by increasing the stroke of the work rolls in the axial direction in the pauses between rolling and their reliable fixation during rolling, the hydraulic cylinders of the axial transfer device § the position and fixation of each work roll are fixed on the thrust bearing housing. SU ... 1178514