SU867616A1 - Apparatus for working parts with free abrasive - Google Patents

Description

(54) DEVICE FOR HANDLING DETAILS WITH A FREE ABRASIVE

I

The invention relates to abrasive machining, such as deburring, rounding, polishing, cleaning, etc., of parts mainly of the type of gas turbine engine blades and can be used in engineering and other industries.

Devices for processing parts with a free abrasive are known, containing working and gas distributing separated by a gas distribution grid with side openings of the chamber, as well as a hollow spindle 1.

A disadvantage of the known devices is the inadequate processing of parts of complex configuration.

The purpose of the invention is to increase the intensification of machining of parts of complex configuration, such as blades of gas turbine engines.

This goal is achieved by the fact that coaxial central holes are made in the gas distribution chamber and the gas distribution grid, in which the spindle is placed, equipped with a mechanism for moving the workpieces made in the form of a slider installed with the possibility of communicating the reciprocating movement along the spindle axis by means of a lever-screw system located under the gas distribution chamber and the lateral holes of the latter are connected to the atmosphere.

FIG. 1 shows a device performing a method of processing in a turbo-liqueur abrasive, vertical section; in fig. 2 is a view A of FIG. 1, (top view from

10 by partial digging along the rotor with the parts to be processed).

The working chamber 1 of the device is made in the shape of a body of rotation with the central axis of the OO and is located above the gas distribution chamber 2 in which the gas distribution grid 4 is fixed between its shoulder B and the ring 3, made of a porous material such as felt or felt. On the grille 4 poured abrasive layer 5.

In the hub B of the chamber 2 is fixed housing 6

Claims (2)

20 spindle 7 having the ability to rotate in it on bearings. For rotating the pinch, the device is equipped with an actuator containing a bevel gear 8 fixed on the spindle and located on the spindle gear 9 mounted on the output shaft of the gearbox 10, which together with the drive motor is mounted on the frame 11 on which the gas distribution chamber is mounted 2. The housing 6 of the spindle passes through the central hole in the gas distribution grid 4. The cavity D of the Chamber 2 by holes D and E is connected to the atmosphere. In the working chamber 1 there is a rotor 12 on which the workpieces are fixed — blades 13, which are mounted (oriented) on the rotor like blades on a fan. In a non-working state, the bottom surfaces of the W parts are located above the abrasive, which is in the unwrought state. Spindle 7 together with the rotor 12 fixed on it and the parts 13 communicate rotation around its geometrical axis OO in the direction in which the rotor with the parts fixed on it acts as a fan, i.e. it throws air upwards - into the atmosphere through the hole I in the working chamber in which a vacuum is created as a result. At the same time, air from the atmosphere through the openings D and E, the gas distribution grid 4 and the abrasive layer are sucked into the working chamber. Passing through the abrasive layer, it partially weighs it, as a result of which the abrasive layer expands and the parts are in this layer. If the degree of vozveshivaniya is small and the abrasive does not rise to the level of the workpiece, then they, together with the rotating rotor, gradually gradually immersed in the abrasive, i.e., the rotor is shifted down. In this case, the parts rotating in a circle, as a part of the procedure, produce mechanical weighing of the abrasive and are processed therein. As the rotor with the parts is lowered down smoothly, the abrasive is weighed gradually as parts are lowered. As a result, the spindle drive spends much less power than if it had been rotated with parts immersed in a fixed abrasive, the resistance of which is much greater than the resistance of the suspended layer. To immerse the parts in the abrasive, the rotor carrying them is fixed on the transition sleeve 14, which is fixed on the slider 15, which can be axially moved in the cavity of the spindle 7. To prevent the slider from rotating relative to the spindle, a groove K in which the pin pressed into the slider can be moved in the latter 16. The lower end of the fifth L slider rests on its movement mechanism, made, for example, in the form of a rocker arm 17, having the ability to rotate on the axis 18 of the bracket 19 fixed to the frame. The right end of the rocker arm is kinematically connected to a drive, for example, a screw 20, equipped with a handle 21 and a limb with a nonius 22. The screw 20 is mounted on the bracket-23 of the bed 11. When turning the handwheel 21 on the axis 18, the rocker 17 turns, mixes, and the height of the rotor with details, i.e., immersing it in an abrasive or, conversely, lifting it from an abrasive. Vertical movement of the slider can be carried out by other mechanisms. Installation and removal from the spindle of the rotor with parts is carried out through the door 24 in the upper side part of the working chamber. This door is made in the form of a part of the camera and installed on it in the lower directions of M on the rollers 25, and in the upper on the bearing 26 with the possibility of rotation around the geometric axis of the OO camera, which reduces its dimensions. The housing 6 of the spindle has a seal 27, interacting with the sleeve 14, which prevents the ingress of the abrasive in the spindle bearings 28. To improve the aerodynamics of the air flow in the working chamber and to prevent the abrasive from being ejected from it, the profile guides 29 and 30 of the cone are fixed in it, and the cone 31 is fixed on the sleeve 14. Installation of the workpieces on the windmill can be done not only with the rotor, but without it - through the open door 24 in the working chamber. After the parts are machined, the spindle is turned off, the abrasive is deposited on the gas distribution grid, and the rotor with the parts is moved to the upper position in which the parts are replaced. Apparatus for processing parts with a free abrasive, containing working and gas distributing separated by a gas distribution grid with side openings of the chamber, as well as a hollow spindle, in order to increase the processing intensification of parts of a complex configuration of blades of gas turbine engines, in a gas distribution chamber and gas distribution the lattice is made with coaxial central holes in which the spindle is placed, equipped with a moving mechanism, we process x parts, made in the form, e slider mounted for message workpiece m reciprocating movement along the spindle axis by means of lever-screw system introduced into the apparatus beneath the gas distribution chamber, and lateral openings last connected with the atmosphere. 9L 1718 19 Sources of information taken into account in the examination 1. USSR author's certificate in application No. 2758054 / 25-08, cl. B 24 B 31/00, 1979. 23 FIG. 1 20 Type A eleven FIG. 2 M