SU284957A1 - TRUNK DRUM MOBILE MILL - Google Patents

Description

The traction drum of the drawing mill is well-known, consisting of a number of metal cheeks on which interchangeable ceramics are installed. However, when fixing the working rings, their destruction is often observed.

In the proposed drum, the destruction of the working rings is prevented and, thereby, its overall strength is increased. This is achieved by installing additional metal inner rings rigidly connected to ceramic working tires and having temperature compensating slots.

FIG. 1 shows a section drum; in fig. 2-bandage with a ring in the section.

The drum consists of metal cheeks 1, 2, 3, 4, and 5 fixed to the shaft of the drawing machine in internal diameter and kept from turning with a key (not shown in the drawing). Bandages 6, 7, 8 and 9, made of a brittle, wear-resistant material, are coupled with the surface of the end cheeks on the outer diameter and on the end surfaces of the metal rings 10 and are kept from turning relative to the base parts of the Cri with the pins 11.

The end grooves of the cheeks are designed to cover the ends of the bandages and the perception of traction. In order to eliminate the possibility of transferring banding radial forces from the cheeks of the parts when they expand from heat during operation, they mate with the cheeks along the internal diameter of the fit with a guaranteed clearance.

Bandages are rigidly connected with metal rings, for example, with the help of glue.

Metal rings, in order to reduce thermal stresses, have temperature-compensation grooves, and to eliminate axial

The forces arising on ceramics are made somewhat wider than external tires. In this case, the metal rings and cheeks are made so that in the axial direction to exclude the contacting of the cheeks and external

fragile bandages. This is achieved, for example, if the metal rings are made wider than the external bandages, which provides a guaranteed gap between the end surfaces of the fragile external bands.

and cheeks.

During operation, metal cheeks can expand unhindered when heated, due to which dangerous stresses for fragile bandages do not occur. Last

in their outer diameter and are subject only to compressive forces. The torque from the shaft of the machine to the external bandages is transmitted through the metal rings. When repairing bandages, metal rings are used as basic for installing and fixing bands in fixtures. All this allows to significantly reduce the cost of wear-resistant material and improves its performance.

Subject invention

A pull drum of a drawing mill consisting of a row of metal cheeks on which replaceable working bands of wear-resistant brittle material, such as ceramics, are installed, characterized in that, in order to increase strength, it is provided with internal metal rings rigidly connected to the working bands, having thermocompensation grooves.

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