SU1234042A1 - Centrifugal casting machine with vertical axis of rotation for making bulky articles - Google Patents

Description

The invention relates to foundry and can be used in the centrifugal casting of large-sized products, mainly mill rolls,

The purpose of the invention is to increase the reliability of the machine.

Fig. 1 shows a centrifugal casting machine with a vertical axis of rotation for casting large-sized products, a general view; figure 2 - section aa aa figure 1.

The machine contains a mold 1, a support 2, STANDING from bed 3, spring 4, ring plate 5, upper 6 and lower 7 thrust spherical bearings, radial spherical bearing 8, face plate 9, flexible rod 10, bearing 11 and drive consisting of motor 12 and belt transmission 13.- The faceplate 9 rests on the bottom 7 and top 6 thrust spherical bearings and is kept from lateral mixing by the radial spherical bearing 8

The upper thrust spherical bearing 6 is supported by an annular plate 5 lying on the springs 4. The spring dimensions are selected in such a way that the vertical load is distributed evenly between the thrust spherical bearings.

Bearing spheres 6-8 have a center 14, located on the vertical axis of the machine, so that the faceplate 9 with the casting mold fixed on it) has mobility relative to this common center.

The flexible rod 0 is fixed in the bed 3. Its upper end is connected through the bearing 11 to the faceplate 9, so that the faceplate 9 with the shape I is held in a vertical position.

The rotating set — the mold 1 and the planiba 9 of the support 2 — is performed with a certain tolerance for static and dynamic imbalance.

If necessary, the machine can be envisaged, except for flexible

rod 10, additional devices, for example, horizontal limiting rollers 15 in the upper zone of the mold, in order to limit the shape oscillations

with the passage of the resonant zone, ceasing their action when the centrifugal mashine at the steady-state speed. The need for such devices is determined by calculation. The presence of a flexible rod Yu reduces the load on the restrictive rollers 15 in the upper zone of the form.

The machine works as follows; Foundry Form 1, set to

The faceplate 9, when the engine 12 is turned on through the belt drive 13, is rotated and, after passing through the resonance zone, reaches a steady-state speed. The mold 1 is then filled with metal. The vertical load from the mass of the mold 1 filled with metal is transmitted through the faceplate 9 to the lower thrust spherical bearing 7 and the upper

spherical thrust bearing 6, supported by an annular plate 5, - lying on the springs 4.

Spring 4 develops a force equal to 1/2 the weight of a set of rotating

mass, whereby the vertical load is evenly distributed between the bottom 7 and the top 6 thrust spherical bearings. The horizontal load is perceived by the pa. diagonal spherical bearing 8.

The proposed machine design allows the foundry to reduce vibration by allowing the center of gravity to combine

Form with the axis of its rotation when the machine reaches the super-synchronous speed, which reduces the quality of the castings, as well as increases the service life of the machine and reduces the energy consumption for friction in

support unit by reducing the loads and speeds in the bearing unit. In addition, the deviation of the axis of the molds from the vertical axis of the machine and the load on the horizontal limiting rollers as a result of the elastic central rod is reduced.

FIG. 2

Claims (1)

CENTRIFUGAL CASTING MACHINE WITH A VERTICAL ROTATION AXIS FOR CASTING LARGE-SIZED PRODUCTS, containing a casting mold, a plan washer rigidly connected to a driven pulley, and a bed, characterized in that, in order to increase the reliability of work, it is equipped with a spherical support persistent and one radial spherical bearings, the centers of the spheres of which coincide, and an annular plate; spring-loaded relative to the bed η spaced between the upright bearings. 1 1234042. 2