SU751596A1 - Centrifugal apparatus for abrasive working of parts - Google Patents

Description

The invention relates to devices for the surface: abrasive machining of parts using centrifugal forces and can be used in engineering, instrument-making and other industries.

Apparatus for abrasive machining of parts is known, comprising a container made in the form of a fixed shell and a rotating bottom of the bowl 1.

The disadvantage of such devices is the local nature of the intensification of the mixing of the load in the container and, as a result, the effectiveness of abrasive processing is insufficient.

The aim of the invention is to increase the relative speeds and pressures in the interlayer movements of the mass of the charge, which results in the performance of the device.

This goal is achieved by installing coaxial, freely floating cylinders made of wear-resistant material in the container. In order to EXCLUDE the significant eccentric displacement of these cylinders in the radial direction, limit their axial movements and ensure the transfer of disturbances from the moving loading medium to the cylinders, they are provided with elastic centering spacers. To transmit disturbances from the rotor-chaschi to the cylinders and the elastic shell and the lid of the container, as well as for the uninterrupted circulation of the loading medium, the cylinders have struts along the upper and lower ends.

To ensure the alternate buoyancy and plunging; epp of cylinders along the longitudinal axis of the container and countercurrent loading medium in annular spaces

10 between the walls of the cylinders and the shell of the container, the cylinders are provided with oblique frames made in the form of truncated conical shells attached to the surface of the cylinders from the outside, with their narrow bases, and inside with the spherical bases.

To ensure that the centrifugal device operates in a vibro-impact mode on annular ends.

20 spacers with container walls are installed local semi-oval protrusions in the amount equal to or multiple of the ends of the struts. To ensure the distribution of vibro-impact disturbances throughout

25 design of the device and their uniform transfer to the loading environment, the struts are made in the form of cantilever beams, of equal strength for transverse and longitudinal bending.

The drawing shows a variant of the proposed 3D device.

The device has an abrasive container consisting of a rotating dachshach /, shell 2 and lid 3. On the shell 2 there is a hatch 4 on the side for unloading, and on the lid 3 in the center there is a massive hatch 5 for loading the container. The coaxial cylinders 6 with the inner 7 and outer 8 oblique frames are placed inside the container, the frames have the form: conic ring conical ring shells.

Tsil.indra 6 between each other, shell 2, bottom-bowl / and lid 3 of the container have elastic struts 9 centered on at least three in each annular section, evenly spaced around the periphery.

The spacers 9 are doubled, in the form of equal strengths on the hp: bend kodols of anti friction material, and their length is chosen so that they do not hinder the movement of neighboring cylinders, as well as cascade, spiral circulation of the loading medium in the container. Opposite the ends of the struts 9 are local semi-oval antifriction spikes W, the number of which is a multiple of the number of ends of the struts. The projections W are evenly spaced around the periphery of the annular lines of the container. The bottom is a bowl / fixed on the shaft / L connected to the drive with a rocking speed of swing (not shown).

In the right part of the drawing, arrows A show cascade countercurrents of loading loads inside the container.

The device operates as follows.

The container is filled with the loading medium, the drive is switched on and the load medium is in position; dnashashi Cylinders 6 begin to rotate from the rotation of the bottom of the bowl and the rotating medium. Due to the fact that the peripheral frames in each annular zone of the container resist the movement of the medium of the upward significantly less than the frames located inside the annular zones, inside each zone countercurrent motion with turbulence cascades, indicated by arrows A. The path of any particle traversed from the container shell 2 to its axis becomes long, with numerous deviations and with large relative -inflammatory sliding speeds between the stages and the particles boot environment.

With an increase in rotational speed of the rotating shaft: on-thrust, and the cylinders, together with the attached loading medium, begin to work as eccentric vibrators, creating oblique impacts in different directions. Vibro-impact disturbances from the periodic contact of the ends of the struts 9 with semi-local local projections 10 are superimposed on this movement.

the ring frames on the cylinders perform the vibrating transport action up or down.

The selection of revolutions of the rotor-box sets the mode of vibrocentrifugal processing with periodic alternate floating and immersion of the cylinders. At the same time, the load in the form of a hatch 5 relative to the lid 3 and the peripheral part of the rotor bowl / relative to its shaft is rocked to the beat

U /. A vibroimpact mode | M is obtained with a wide variety of frequencies and amplitudes. By adjusting the speed of rotation of the shaft // and the volume of the load, separate resonant modes can be realized mainly with one resonant frequency.

At the end of the processing end, the hatch 4 is opened and the load is fed from the container for separation.

The proposed centrifugal device / allows all modes of vibration treatment to be implemented in a single container, using LI (SCH single rotor drive, this increases the amount of simultaneously processed loading medium and improves processing homogeneity.

Claims (2)

1. A centrifugal device for abrasive machining of parts, containing a container, vypolienyy in the form of a fixed shell and rotating dachshachi, characterized in that, with the aim increase in relative velocities and pressure in interlayer loading movements, the device is equipped with a cascade unit installed in the container, made in the form of freely floating coaxial cylinders fitted with centering elements. 2. The device is described in clause 1, which is based on the fact that, in order to ensure the operation of the cylinders in vibro-impact mode, The inner surface of the container is mounted limiters, the number of which is equal to the number of centrifugal; their elements. I The source of information taken into account during the examination: 1. USSR author's certificate 537795, cl. 24/31/08, 1975. J L,: -: ...-- r. . -. -,