SU818833A1 - Vibration centrifugal machine for finishing parts - Google Patents

Description

3

10 has a massive deflecting device 13 having seiing openings and an internal cavity freely encompassing fungus-shaped measles 14 fixed in the center of the rotating bowl 8. In addition, the pulling device 13 from the center of the bowl 8 has a replaceable friction tip 15 interacting with the corresponding surface in the middle of the bowl.

Along the shaft 10, rubberized elastic petals 16 are placed in a fan in a horizontal plane, one end fixed to the sleeves 17, and the other ends in contact with the walls of the container. The sleeves 17 transfer torque from the shaft 10 to the petals 16 by means of a spline connection (not shown in the drawing) .-- The sleeves 17 between themselves and the ends of the shaft are separated by rubberized coil springs 18.

In the region of the lower section of the shell 4, there is a hatch 19 for separating the abrasive from the parts when unloading the container. In the upper section of the shell there is a hatch 20 for loading. A pipe 21 is provided to drain the liquid and waste from the chamber.

The adjustment of the working length of the flexible shaft 10 is carried out by means of a threaded joint 22. To adjust the self-oscillating mode of operation of the machine, the ring 3 is made in the form of an annular pneumatic chamber with an elastic insert 23.

The proposed machine works as follows. Set the length of the shaft 10 by means of a threaded joint 22. Set the gap between the friction surfaces of the tip 15 and the bowl 8 by changing the air pressure in the chamber of the ring 3. Then the container is filled with working medium through the hatch 20, the drive shaft 7 is turned on, and the rotating bowl 8 is removed on a given mode.

Loading in its helical motion near the container walls captures the petals 16 of the shaft 10, thereby causing an elastic loss of stability of the petals and the corresponding vertical and torsional self-oscillations of the shell with the lid and shaft 10, supported and strengthened as a result of the flow of fluid flowing into the container from under the rotating bowl, and due to the interaction of the friction surfaces of the bowl 8 and tip 15.

After that, the actuator I is turned on. Specifying the direction and magnitude of the rotational speed of the actuator 11, and also adjusting the rigidity of the oscillatory system by changing the pressure in ring 3, the maschine is introduced into a stable self-oscillatory mode of operation. In this case, the rotating lobes 16, deflected upward by the turbulent action of the rotating load, are periodically pressed by the free ends to the shell and then, pushing away from it, enter the mode of disruptive high-frequency bending-torsional self-oscillations, i.e., the flutter mode.

The shaft 10 can be installed with an unbalance due to the appropriate placement of the petals, which enhances the politer shaft oscillations. Rotating loading and petals in contact with the container in

the deflection of the shaft, limit its transverse oscillations.

At the same time, the vertical oscillations of the shell 4 cause the tip of the shaft 15 to touch the bowl 8, as a result of which the shaft 10 receives an additional twist, as well as longitudinal compression and loses stability. At the moment of the loss of stability by the shaft, its petals are sharply pressed against the wall of the container in

the direction of the shaft arching and, together with the loading action, push the shaft 10 back into a vertical position. The shaft, being pulled, again comes into contact with its tip with a thicket. 1Dickle repeats,

amplifying vertical and torsional auto-oscillations of the shell.

After the parts have been machined, the lead 11 is turned off, the hatch 19 is opened, and the container is unloaded using centrifugal forces from rotating the bowl. Then turn off the drive shaft 7.

The movement of a typical particle A during processing is shown by a discontinuous line. Thanks to the screw action of the petals

shell height and filling of the container can be increased.

The proposed centrifugal machine has a simple compact design and allows all degrees

abrasive surface treatment of parts: from rough to fine finish, as well as various degrees of surface hardening. The proposed flexible shaft with petals can be embedded in existing

centrifugal machine.

Claims (2)

1. A vibrating centrifugal machine for finishing parts, comprising a base, a sealed container rigidly fixed on the base, with a vertical axis of symmetry composed of upper and lower elastic shells interconnected a conical shape, a conical thicket mounted rotatably inside the container, as well as a shaft located along the vertical axis of symmetry of the container fixed by the upper end to the cover of the upper shell rotatably and having a tapping centering device at the lower end, characterized in that, in order to intensify the process, the shaft is made in the form of a flexible rod and provided elastic horizontal fan-shaped petals, while the shaft pulling device on the side of the bowl has a frictional surface adapted to interact with the counter surface of the bowl. 2. Vibrocentrifugal machine according to claim 1, characterized in that the horizontal petals are mounted on the shaft with the possibility of sliding along it and separated by elastic elements. Sources of information taken into account in the examination 1. USSR author's certificate No. 580099, cl. B 24V 31/08, 1976. // 13 2 /