SU1509234A1 - Device for centrifugal planetary abrasive machining workpieces - Google Patents

Abstract

The invention can be used for the mechanization of finishing work for deburring, surface dimensionless grinding in the conditions of mass production of small parts. The purpose of the invention is to improve the quality and productivity of processing due to the uniform rotation of the working chambers. The device contains a base 1, a rotating platform 3, on which working chambers 4 are mounted, mounted for additional rotation around their axes, the central element 8 being fixed to the base using a torsion bar 9, and on the lower part of the chambers mounted hingedly retaining ring 13. 1 Il.

Description

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The invention relates to a planetary centrifugal treatment and can be used for finishing operations of small and thin sheet parts in the engineering and other industries.

The aim of the invention is to improve the quality and productivity of processing, due to the uniform depth of the working chambers.

The drawing shows a device for processing fine parts in an abrasive environment, a slit.

A centrifugal-abrasive machine can be used as a drive when there is no need to process hard parts with a large loading mass.

The device contains a stationary cylindrical base 1 with a vrah, a cup-shaped bottom 2, in the center of which a platform 3 is fixed, with several working-length and 4 chambers 4 uniformly spaced along the bottom and fitted with centering cups 5 mounted on hinged axes with bearing bushings 6 mounted on the platform 3. In the bottom part, the working chambers have means 7 for rotation (a ring gear, a roller, etc.) interacting with the central element 8 mounted coaxially with the plate / mold 3 on the torsion bar 9, which replen on the roof with openings 10 for access to the working chambers 4. Torsion 9 must be located coaxially with the cup-shaped bottom so that the means of rotating the chambers reliably come into contact with the central element, since the working chambers are fixed equidistantly from the central axis of the platform or cup-shaped bottom ( The frame is rigidly mounted on a bowl-shaped bottom, it may have a different design).

The inner surface of the walls 11 and 12 of the working chambers is lined with wear-resistant material. The system of supply and removal of fluid is not shown.

The retaining ring 13 lies on the rims of the bearing sleeves 6 with the lower end and interacts with the outer surface of the centering cups 5 with the inner surface. In some cases, the inner surface of the ring 13 may be provided with a gear ring for direct interaction with the means 7 for rotating the working chambers. Spurious gears can be installed between the central element 8 and the means 7 for rotating the working chambers, rollers (not shown) for changing the angular speed of rotation of the working chambers around their axes, for example, to eliminate the self-lining effect.

The device works as follows.

When the drive is turned on, the platform 3 together with the cup-shaped bottom 2 and the working chambers 4 rotates in one direction.

The research institutes, while working chambers, rolling around the central element 8, receive rotation around their axes. The centrifugal forces arising from the rotation result in

the mass of the load (parts and abrasive filler) of the working chambers, resulting in processing. Torsional vibrations (uneven rotation) are caused by a number of reasons: the difference in load masses, the coefficient of friction, the amount of working fluid in the working chamber, etc., which adversely affects both the durability of the drive and the uniformity (quality ), therefore, on processing performance. The higher the uniformity of processing, the fewer parts that require manual or other refinement.

When raising the angular speed of one of the working chambers, the retaining ring, interacting with it, as well as with other working chambers, takes some of the energy (the flywheel moment) and distributes it among the others, remove them and increase the angular velocity, its average value, ring, Thus, it reduces the amplitude of torsional vibrations of the first working chamber, increasing the angular velocity (intrinsic) to a certain value. With a decrease in the angular velocity of one (or all) of the working chamber, the massive ring, having given off its kinetic energy, aligns the angular velocity of this working chamber. Such a phenomenon can be observed, for example, when there is a large discrepancy between the mass of loading of the working chamber and the rest (due to blockage of the opening for discharging the working fluid) or, conversely, when the supply of working fluid is stopped.

Possessing a large inertial mass, co. 13 serves as a balanced flywheel, connected through friction (which is promoted by articulated axles) or gear.

the engagement with the working chambers ensures the reduction of the torsional vibrations of the working chambers that run around the central element 8.

The torsion bar 9, bending in the direction of the forces developed by the working chambers, provides a flat movement of the central element 8, creating evenly distributed forces in the kinematic chain of rolling, i.e. allowing the central element to be installed coaxially with the cup-shaped bottom 2.

Claims (1)

Invention Formula A device for centrifugal-planetary abrasive machining of parts, comprising a platform rotating by means of a drive, carrying vertically placed working chambers mounted rotatably around their axes pu1509234 56 the kinematic connection with the zeitral platform is articulated and connected between the element fastened by means of a shaft which is inserted into the device with a bandage on the base, characterized in that, at the same time, the shaft connecting the center of the quality and the production element with the base, processing, the working chambers are placed5 torsion.