SU1201007A1 - Composite metal-rolling roll - Google Patents

Abstract

COMPOSITE ROLLING ROLL, comprising a housing, an axis, a carbide brace and an axle fastening mechanism, characterized in that, in order to improve the workability of the roll by compensating for thermal expansion of the axis and the brace while simplifying its design and operation, in the axle body concentric grooves are made, and each groove from one end overlaps the groove from the other end.

Description

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The invention relates to metallurgy, in particular, to tools for rolling ferrous and non-ferrous metals, preferably small grades.

The purpose of the invention is to improve the performance of the Valken by compensating for the thermal expansion of the band and the axis while simplifying its design and operation.

The drawing shows schematically the proposed composite mill roll, the section.

The mill roll contains axis 1, a body consisting of left 2 and right 3 cheeks, a carbide band 4. All components are connected by means of screws 5. There is a gap between the carbide band 4 and the axis of the roll, which is determined by the conditions for creating minimum tension operating temperature of the roll. The dimensions and number of screws are determined from the condition of creating a compressive strength of the band 4, sufficient to prevent its displacement under the action of the forces that occur during rolling. At each end of the axis, concentric grooves 6 are formed, which form elastic elements 7. Radial grooves are executed in order to enable the elastic elements to work in the axis.

The device works as follows.

On the axis 1 of the roll, the rights 3 and left 2 cheeks are installed and the entire structure is tightened with screws 5. In the process of work, when the roll heats up to the operating temperature, the preliminary gap between the axis and the bandage is selected without creating excessive stresses.

Research Institute of stretching in a bandage. In case of a roll temperature higher than normal (in case of various failures in the mill), the thermal expansion of the axle is compensated for by elastic elements, as a result of which no dangerous tensile stresses are created in the working ring (band). The minimum deformation of each elastic element in combination with other elastic elements provides a generally significant elastic deformation of the outer diameter of the axis. Depending on the required value of the elastic deformation of the outer diameter of the axis in the latter, two or more elastic elements can be made. At the same time, the stiffness of the elastic elements is sufficient for taking up the axis with practically no deformation of the rolling forces. Calculations show that the pressure at the border of the contact of the band with the axis - from the rolling force is 20 times less than the pressure resulting from the overheating of the roll. Sufficient elasticity of the axis (i.e., with maximum deformation of the outer diameter of the axis, minimum stresses arise in the elastic elements, ensuring durability and reliability of the roll.

In the proposed mill roll design, the tensile stresses in the band are eliminated when the roll is heated during operation, which virtually eliminates the release of rolls due to overheating, increases the equipment utilization rate. The simplicity of the design provides low labor input for the manufacture and operation of the roll.

Claims (1)

COMPOSITE ROLLING SHAFT containing a housing, an axis, a hard-alloy brace and a mechanism for fastening the brace on the axis, characterized in that, in order to increase the operability of the roll by compensating for the thermal expansion of the axle and brace while simplifying its construction and operation, in the body of the axis from its internal the ends are made of concentric grooves, with each groove from the same end overlapping the groove from the other end.