SU806180A1 - Composite rolling roll - Google Patents

Description

(54) COMPOUND ROLLED ROLLS

one

The invention relates to rolling production, in particular to rolls of section rolling mills, and can be applied to rolls of pipe rolling mills.

A roll for cold rolling of tubes is known, consisting of an axis and annular gauges mounted on it during a hot fit, having grooves on the end surfaces in which the connecting elements are arranged in the form of prismatic tongues 1.

However, in this design, the ring gauges are mounted on the drive axle by means of hot landing, which significantly weakens the axle due to a decrease in its established strength, while the torque transfer of the gauges occurs stepwise, i.e., not smoothly, which reduces their durability.

In addition, in this design, it is difficult to assemble and disassemble the rolls, to replace gauges due to the fact that they are planted on the axle with tension, as well as the small working surface of the roll.

The closest technical solution to the proposed relates to a composite mill roll containing an axle with collar and mounted on it with a gap and in sttsk between themselves bandages with a profile outer surface and their connecting elements in the form of stepped keys 2.

The disadvantage of this roll is that the stepped tongues impede the transmission of significant torques, which reduces the carrying capacity of the roll and the reliability of fixing the gauges against rotation.

The purpose of the invention is to increase the carrying capacity of the roll.

To achieve this goal, an integral mill roll containing an axis with a collar, mounted on it with a gap and joint between the tires with the profile and outer surface and their connecting elements, the latter are made in the form of difference rings with a cylindrical inner and profile outer surface, under which are made in the ends of the adjacent bandages profile grooves.

Claims (2)

FIG. 1 shows a mill roll for grade, general view; in fig. 2 is a section A-A in FIG. one; in fig. 3 and 4 section bb in fig. 1 (possible options). The mill roll contains an axis 1 with a collar 2, bandages 3 installed on it with profiled strands 4 on the outer surface and their connecting elements in the form of differential rings 5 with a cylindrical inner and profiled outer surfaces. Install the bandages on the axle in a loose fit, i.e. with a gap in the joint between each other, .and are enclosed between the sleeve 6 and the nut 7, wrapped in the threaded part of the axis. In the end surfaces of the neighboring. the bandages are made with profile grooves in which rings 5 are fitted with a gap. The rings are mounted on the I-shaft along the free fit. The most optimal profile of differential rings is a multi-axis form, formed on the basis of a regular triangle (Fig. 3), since it provides a constant coaxiality of the mating parts and creates more favorable conditions for torsion work. Possible embodiments of the connecting elements may be rings of a cycloidal (pericycloid, hypocycloid) cross-sectional shape, ellipsoidal, in the form of a polygon with rounding at the corners, a circle without one or two segments. The roll assembly is carried out as follows. Axis 1 is installed in a vertical position, lowering the sleeve 6 until it stops in the shoulder 2, having flats, and alternately wearing the differential rings 5 and bandages 3. After dialing the bandages, tighten the nut 7, pressing the bandages, the rings and the sleeve one to another and shoulder on the axis. The disassembly of the rolls is carried out in reverse order. Composite mill roll of the proposed design works as follows. The torque from the axis 1 to the band 3 is transmitted by means of a sleeve 6, planted on the shoulder with flats on the axis, and connecting elements, which are inserted in the profile grooves of the bandages and sleeve 6. The transfer of torque from the sleeve to the bandages is due to that the grooves of the bushings and rings 5 have a non-circular shape. The implementation of the connecting elements in the form of core rings, respectively, to the groove of the tires allows to create favorable conditions for torsional work and thereby increase the durability of the gauges, allows to transmit a greater torque, thereby increasing the bearing capacity of the roll, to increase the fixation of the tires by turning. The present invention possesses an enhanced axle resistance due to an increase in its fatigue strength, an increased endurance of the bandages due to an increase in the smoothness of the transmission of torque, as well as a higher reliability of fixing the bandages against rotation. In addition, the invention allows for quick assembly and disassembly, multiple use of the axle and retaining gauges. Claims of the Invention: Composite mill roll comprising a collar with a collar mounted on it with a gap and a joint between themselves of tires with a profile outer surface and their connecting elements, characterized in that, in order to increase the bearing capacity of the roll, the connecting elements are made in the form of differential rings with cylindrical inner and profile outer surfaces, under which profile grooves are made at the ends of adjacent bands. Sources of information taken into account in the examination 1. USSR patent № 240559, cl. B 21 B 27/02. 1966. 2. USSR author's certificate No. 485793, cl. B 21 B 27/02, 1974.