SU1495082A1 - Machine for cengtrifugal abrasive working of articles - Google Patents

Abstract

The invention relates to the volumetric processing of parts of various configurations with a free abrasive. The machine contains a welded frame 1, inside which the working chamber 2 is installed. The working chamber is formed by a fixed cylindrical shell 14 and a bottom-rotor 15. A window is made in the shell that is covered by a separation grid 16 and a door 17. The door is connected to the shaft by levers 19 and 20 installed in shell brackets and connected to an electric motor. The shell is mounted on the pallet 29 in the form of a box mounted on the frame 30, and is based on the centering box at the bottom 31 of the gearbox housing. Inside the box there is a cavity 32 for collecting and draining the working fluid. Workpieces and abrasive are loaded into the working chamber, where they are moistened with liquid. During rotation, the entire mass of the load is involved in a complex toroidal-screw motion, in the course of which the movement and interaction of the filler granules and the parts, causing the processing process, takes place. 2 hp f-ly, 8 ill.

Description

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This invention relates to the volumetric processing of parts and products of various configurations with a free abrasive and can be used in mechanical engineering and other industries.

The purpose of the invention is to simplify the design of the machine.

Figure 1 shows a machine with a loading device, general view; figure 2 is the same, the section along the working chamber; on fig.Z - type L on figure 2; Fig. 4 is a cross-section b-B in Fig. 2, embodiments of inclined sections on the inner conical surface of the rotor; on fig.Z - view In figure 2; on fig.b - lattice rigidly fixed on the inner surface of the shell; figure 7 is a view of the figure 6; on Fig - the position of the door and the grid when unloading parts.

The machine consists of a welded frame 1 (Fig. 1), inside of which the working chamber 2 is mounted, the rotational drive of the rotor and electrical equipment with a control panel 3 are controlled. From the outside, the frame is closed by lining 4. To close the working chamber, a lid 5 is installed on the lining. The rotor drive includes an electric motor 6, an automatic gearbox (LPC) 7 and a gearbox 8. The gearbox electromagnetic clutch is lubricated by gear pump tank 10 The motor is connected to the LPC through a belt drive 11.

The composition of the machine also includes a tank 12 of the working fluid and the boot device 13.

The working chamber of the machine is formed by a fixed cylindrical shell 14 and a bottom-rotor 15, made in the form of a plate (figure 2). In the shell there is a window covered by a separating grid 16 and a door 17 adjacent to it with an elastic seal 18. The door is connected to shaft 21 by means of a hinge 21, which is installed in shell bracket 22 (FIG. 3) and is connected to coupling 23 single turn actuator 24.

A bypass tray 25 is fixed to the shell, having a rotatable part 26 with a film 27, which fits with a separating projection 28

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082 grids 16 mounted on the same axis with the door 17.

The shell is mounted on a pallet 29 in the port ;; e of the box, which is mounted on the frame 30 and is based on the centering box on the bottom 31 of the gearbox housing 8. Inside the box there is a cavity 32 for collecting and draining the working fluid. On the box is fixed to the second bypass tray 33 and a single-turn electric actuator 34, which through the coupling 35 is connected to the axis of the rotary part 26 of the tray 25.

The rotor 13 is fixed on the spindle 36 and on the inner conical surface has two or more evenly spaced inclined and non-intersecting axis of rotation radial protrusion, each of which in cross section has the shape of a segment with an area increasing to the periphery of the rotor.

The inner surfaces of the shell and the rotors are covered with elastic wear-resistant material 37 and 38, for example rubber or polyurethane, and polyurethane seals 39 and 40 are installed in the interface of the rotor and shell.

The tray 29 has an inclined partition 41 rigidly connected with its walls, on which a vertical flange 42 is placed with a horizontal partition 43, in which a central opening is made to accommodate the centering ska 31 therein.

In one embodiment, the interchangeable grill 16 may be rigidly fixed to the inner surface of the shell, and the bypass tray 25 is made integral (Figures 6 and 7). In this case, the tray 33 and the actuator 5 are not installed 34.

The machine works as follows.

The parts to be machined and the abrasive filler are loaded into the working chamber, where they are moistened with liquid / carbon dioxide supplied by the pump through the pipe 44 (figure 2). When the rotor rotates, the entire mass of the load is involved in a complex toroidal-screw motion, during which the relative displacements and interactions of the filler granules and parts occur, causing the machining process.

With waste treatment through the gap between seals 39 and

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40 flows into the cavity 32 of the box, from where through the hole 45 and the pipeline flows into the tank 10.

The processing mode (angular speed of the rotor, filler, working fluid) is chosen depending on the size and configuration of the parts being machined, the material from which they are made, the quality requirements for processing, etc.

After the processing is completed, the actuator 24 is turned on, which turns the shaft 21 and opens the door 17 through the levers 19 and 20 (Fig. 8). At the same time, the granules of the abrasive filler, whose dimensions are smaller than the lattice holes, are ejected into the chute 25 by the action of centrifugal forces, in which they roll into the container of the loading device 13. After unloading the filler, the angular rotational speed of the rotor switches to a smaller one. At the same time, the actuator 34 is turned on, which rotates the upper part 26 of the tray 25. At this time, the tray 25 overlaps, and the bar 28 opens the lug 28. The machined parts are ejected through centrifugal forces through the window in the shell to the tray 33, through which they enter special packaging. After unloading the machined parts, the turning part 26 of the tray 25, the grill 16 and the door 17 are returned to their original position. The abrasive filler is returned to the working chamber, where the next batch of workpieces is loaded, by means of a loading device, and the cycle is repeated.

The control of the machining cycle in the machine, including the switching of the angular velocity of the rotor, is carried out automatically using a time relay and an automatic transmission.

Unloading abrasive filler through a vertically positioned replacement grill provides the possibility of separation within the working chamber of a wider range of parts as compared to separation in an autonomous separator with a horizontally arranged vibrating grid. This is due to the fact that the filler granules of a relatively regular shape move with respect to the lattice at high speed.

and freely pass through its openings. Parts whose dimensions in different planes, as a rule, are significantly different, do not pass through the holes of the lattice, since the probability of their orientation to smaller dimensions relative to the holes of the lattice is small. On

a horizontal grid where the parts move under their own weight at much lower speeds, the likelihood of such an orientation is much higher,

When the grille is rigidly mounted on the inner surface of the shell, the filler is unloaded in the same way as described above, and the machined parts are unloaded either manually,

either with magnetic or other special devices. In this case, parts can be unloaded both when rotating and with a stationary rotor.

Such an embodiment is simpler and can be used with small (up to 50 liters) volumes of the working chamber.

The machine provides an increase

performance, expanding the range of workpieces with separation and automatic mode, as well as simplifying the design, assembly process, testing and debugging.

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Claims (3)

1. A machine for centrifugally-abrasive machining of parts, containing a frame with a tray to drain the working fluid with processing waste, a working chamber mounted on a frame, formed by a vertical cylindrical shell and a rotor-shaped bottom connected to the vertical} 1st output rotary drive shaft mounted in the bed, separation grid and on the outside of the grid the tray for collecting the separated elements, characterized in that, in order to simplify the design, the centering gear is made coaxially with the output shaft on the rotational drive housing on the juice, the pallet is made in the form of a box with an inclined partition rigidly connected to its walls, on which a vertical flange is placed with a horizontal partition, in which a central opening is made, which is intended to accommodate a centering ska in it, while a window is made in the wall of the shell. , in which the separation grid is installed and the door is inserted into the machine. 2. The machine according to claim 1, characterized in that the separation grating and the door are rotatably mounted on a common axis, the upper part of the bottom tray being rotatable and intended for interaction with the lower end of the lattice during the removal of parts outside the chamber. one 3. The machine according to claims 1 and 2, characterized in that radial protrusions are equally spaced around the inner conical surface of the rotor, each of which in cross section has the shape of a segment type with an area increasing to the periphery of the rotor. / J 1 V Type G FIG. 7 FI.6 20