SU1660778A1 - Prestressed rolling stand - Google Patents

Abstract

The invention relates to rolling production and can be used on continuous mills equipped with non-permanent prestress cysts. The purpose of the invention is to expand the technological capabilities of the stand by adjusting the solution of the rolls under load and simplifying the design of the stand. The installation of gear racks fitted with a drive, for example, hydraulic, in the pillows of the rolls allows the cage to expand its technological capabilities, since it changes the center distance of the rolls under the rolling force and provides the possibility of remotely changing the center distance of the rolls. Making the roll solution indicator in the form of a ruler connected to an eccentric bushing by means of a lever-rocker mechanism, for example, and supplying it with a sensor, expands the technological capabilities of the stand, since it ensures the proportionality of the signal produced by the sensor, the amount of change in the center distance of rolls, and the center distance of the rolls, the stand adjustment by the sensor and the stand operation in automatic mode. 5 il.

Description

The invention relates to rolling production and can be used on continuous mills equipped with non-permanent pre-tensioned stands.

The aim of the invention is to expand the technological capabilities of the stand by adjusting the solution of the rolls under load and simplifying the design.

Fig. 1 shows a cage with a cut along a roll and a mechanism for adjusting the center distance; in fig. 2 is a view A of FIG. one; in fig. 3 is a view B in FIG. 1; in fig. 4 shows a section B-B in FIG. 1 (gear rack drive-hydraulic); na1

FIG. 5 - the same led gear racks - screw.

The prestressed rolling stand consists of work rolls 1 and 2. mounted on bearings 3 in pillows 4-7 are joined in pairs by traverses 8 and 9. adjusting gaskets 10 installed between the pillows, the adjustment mechanism and the indicator of the roll solution mounted in pillows 6 and 7 one roll. Traverses 8 and 9 are connected by bolts 11 and tightened with the help of hydro-nuts 12.

The mechanism for adjusting the center distance consists of two eccentric bushings 13 with cylindrical gear

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Fingers 14, placed between bearings 3 and cushions 6 and 7, two double-sided rails 15, installed in guide 16 cushions b and 7, shaft-gear 17, coupled with racks, shaft 18, separating shaft-gear. The drive of the rails 15 is made hydraulic (Fig. 4), the guides 16 are made in the form of glasses constituting the bodies of plunger hydrozippers, and the ends 19 of the rails 15 are cylindrical and provided with annular seals 20.

The drive rails 15 can be made manual (Fig. 5). In the rail 15, a threaded bore 21 is formed at this, cooperating with a screw 22 fixed with an axial movement in the guide 16. At the end of the screw, a square is made to rotate it manually.

The solution index of the rolls 1 and 2 consists of a slider 23 mounted on guide rods 24 fixed on the cushion 6, a roller 25 fixed by means of a bracket 26 on the end of the eccentric bushing 13 and cooperating with the slider groove. On the slider there is a reading ruler 27 with a uniform scale of reference and a gear comb 28 with which a gear wheel 29 is mounted, mounted on the shaft of the pulse sensor 30. The sensor is fixed on the cushion 6. The kinematically drive of the ruler 27 is a lever-link mechanism in which the movement the axis of the roller 25 copies with a zoom scale the movement of the axis of the roller 2 relative to the axis of rotation of the eccentric sleeve 13, and the movement of the slide 23 is directly proportional to the amount of movement of the roller.

The cage works as follows. The assembly of the mechanism for adjusting the center distance is carried out in the following sequence: eccentric sleeves 13 are installed in cushions 6 and 7, rail 15 are mounted into the holes under the guide cushions, then inserted into bores of cushions shaft gears 17 and secure them.

No adjustment of the engagement of the double-sided rail 15 with the gear rim 14 of the eccentric sleeve 13 and the gear shaft 17 is not made.

Next, the assembled pillows with bearings are mounted on the rolls 1 and 2, the pillows are combined with crossbars 8 and 9, the required thickness of shims 10 is selected and two rolls with pillows and crossbars are bolted 11 with hydraulic nuts 12 for the calculated force. By turning the gear shaft 17, the eccentric sleeves 13 are placed coaxially and the zzl gears are interconnected by a shaft 18. Thereafter, the size of the gauge of the rolls is adjusted by a drive for moving the rails 15 and the roll position data is entered into the information system of the mill. In case of adjusting the center distance of the rolls when the stand is installed in the line of the rolling mill, the data on the amount of movement of the roll from the pulse sensor 30 0 is entered into the information tracking system. This allows the use of the stand in the automated process control system for the rolling process, as well as remotely adjust the center distance 5 of the rolls.

The hydraulic drive of the rails consists in applying pressure to the plunger hydraulic cylinders, in which the end parts 19 of the rails 15 are installed. The force developed by the hydraulic cylinders is sufficient to turn the eccentric sleeves 13 under the action of the rolling force.

When adjusting the center distance 5, the slider 23 with the ruler 27 performs movements directly proportional to the movement of the roll, the shaft of the sensor 30 is also rotated by an amount proportional to the movement of the roll. A uniform scale of 0 on the ruler 27 simplifies the reading of the position of the roll, and the sensor 30 enters data into the information tracking system without distortion.

Compared with the known stand, the invention allows to achieve the following advantages:

to expand the technological capabilities of the stand by allowing the rolls to change the solution under rolling force 0, remotely adjust the center distance of the rolls, and ensure that the stand operates in automatic mode; reduce mill downtime by providing roll dilution in the event of metal being stuck between rolls;

Claims (1)

increase the yield of rolled products; simplify the assembly and configuration of the cage. Claims Pre-stressed rolling-0 on a stand, including rolls installed in pillows, a mechanism for adjusting the center distance of the rolls, containing eccentric sleeves with cylindrical gears, installed in 5 pillows of one of the rolls, turning the eccentric sleeves and the indicator of roll solution characterized by the fact that. in order to expand technological capabilities by adjusting the solution of the rolls under load and simplify the design, the rotational drive of the eccentric bushings is made in the form of toothed racks interacting with the toothed rims and fitted with hydraulic cylinders, these cylinders, the roll solution indicator is made in the form of a ruler connected to the eccentric bushing by means of a lever-rocker mechanism, and is equipped with the ends of the rails are made in the form of plungers 5 pulse sensor. In id SS № 15 17 28    // but at Phia.1 14 15 77 2 WITH rd id to t l AT 8 13 sixteen yy