SU948477A1 - Apparatus for embracing roll in rolling stand by strip - Google Patents

Description

one

The invention relates to rolling production and can be used in rolling shops of ferrous and non-ferrous metallurgy plants.

The closest technical solution to a similar task is a device for spanning a roll in a rolling stand that contains a crankshaft lever mounted on the drive shaft, which carries a toothed pressure roller on the free, Q end, a lever lock in the working position, made in the form of a toothed sector, mounted on the end of the lever and interacting with the gear, mounted-ts. in the cage and connected in turn with the ratchet mechanism S13.

This device allows rolling the rolls during rolling-drawing of thin and very thin strips and 20 strips. The main disadvantages of the device. WA: 4

1) an increase in the dimensions of the cage outside the working position;

2) the inability to automatically press the strip roller when changing the radial installation of the rolls;

3) it is necessary to fix the lever in different positions when changing the gap between the work rolls.

 The purpose of the present invention is to ensure that the strip is constantly pressed by the bypass pressure roller regardless of the radial positioning of the work rolls.

The goal is achieved by the fact that in the device for stripping a roll in a rolling stand containing a lever mounted on the drive shaft, having the shape of a knee and carrying a bypass pinch roller on the free end, the lever.or in the working position, made in the form of a toothed sector installed at the end of the lever and interacting with a gear mounted in a cage and connected in turn with a ratchet mechanism, according to the invention, the lever is made of two parts pivotally interconnected and equipped with a spring stretching, binding portion thereof, wherein the hinge pin in the operative position of the lever and the axis of the bypass pressure roller races are laid on opposite sides of the plane of the axes of the work rolls, and gear retainer arm sector is located at the end portion of the lever mounted on the drive shaft.

In order to increase the angle of the roll by the strip, the DEVICE is equipped with an additional roller mounted on one of the parts of the lever.

FIG. 1 shows the arrangement of the device for covering the rolls with a strip in the rolling stand relative to the work rolls (the dotted line shows the inoperative position of the device; Fig. 2 is a view along arrow A in Fig. 1; Fig. 3 and are the forces acting on the bypass roller in the working the stages of creating a strip of rolls for covering rolls.

A device for covering the rolls with a strip in a rolling stand has two rolls of water 1. Their centers are displaced from the plane of rolling of the strip, fixed at their ends relative to them, one lever 2 consisting of two parts. Both parts of each of the levers are pivotally connected by means of axis 3.

.At the end of the lever is installed in bearings bypass pressure roller. On one of the parts of the lever (also in bearings) a bypass roller 5 is installed. Both parts of the lever are pulled together by a spring 6. The lever 2 is locked in the working position by means of the toothed sector and gear 7 mounted in the cage and connected to the ratchet mechanism.

The drive shafts 1 are installed in the housings 8 on bearings and placed, for example, on the stand of the cage. In the working position, the axis 3 of the hinge is placed in such a way that the resulting force from the tension of the strip acting on the pressure bypass roller k passes below the specified axis. Otherwise, the bypass pinch roller will not be pressed against the shaft, and the coverage of the rolls 9 by the strip 10 during rolling will be impossible.

The device works as follows.

In the initial position, the bypass pinch roller k is located below the strip rolling plane. When this spring 6 holds part of the lever

2c bypass roller t from decay. After filling the strip 10 into the gap between the rollers 9 and creating pressure between them, the drive shaft 1 begins to rotate clockwise -t

ke. Movie k carries along a strip. Upon further movement of the lever 2, the roller through the strip comes into contact with the generator of the barrel of the work roll 9, and at the moment of contact the axis 3 of the roller must be located at a distance greater than the roll radius. Otherwise, the roller will be driven into the roller, and further movement of the lever will be impossible.

After contact of the roller with the work roll 9 and further movement of the lever 2, the roller rolls over the forming roll. Wherein

under the action of the spring, the strip 10 is pressed against the roll barrel.

When rolling a strip and a large coverage angle, the touch of a strip branch incident on the bypass pressure roller

and the branch escaping from it is eliminated due to the bypass roller 5, which can be mounted on one of the parts of the lever.

When reaching a working position

The lever 2 is fixed, for example, by means of a gear 7, a toothed sector mounted on the end of a part of the lever 2 located on the drive shaft 1.

The use of this device for covering the rolls with a strip in the rolling stand will ensure that the belts and strips are filled with the purpose of rolling-drafting, to improve the quality

the surface of rolled strips and strips, reduce the time for filling the strip and thereby increase the productivity of the mill by about 15-20.

Claims (1)

1. Device for covering the roll strip in the rolling stand, containing a lever mounted on the drive shaft, having the shape of a knee and carrying at the free end a bypass pressure roller, a lever lock in the working position, made in the form of a gear sector mounted on the end of the lever and interacting with gear mounted in a cage and connected in turn with a ratchet mechanism, characterized in that, in order to permanently press the strip with a bypass pressure roller, regardless of the radial setting of the work rolls, the lever made of two parts hinged together, and provided with a tension spring connecting its part, with the hinge axis in the operating position of the lever and the bypass axis when  84776 the roller roller is located on different sides of the plane of the axes of the work rolls, and the toothed sector of the lever retainer is located at the end of the lever portion mounted on the drive shaft. 2, the device pop. 1, differs from the fact that, in order to increase; The coverage angle is provided with an additional roller mounted on one of the parts of the lever. Sources of information taken into account in the examination 1. USSR author's certificate 15 No. 419275, cl. B 21 B 39/16, 1972 .. Hinge axis fig.Z ffcb hinge l Fy ut.5 Phi1, $