RU74333U1 - DEVICE FOR VIBRATION ABRASIVE PROCESSING OF CYLINDRICAL PARTS - Google Patents

Abstract

The area of use is vibration abrasive finishing processing, in particular, lapping (grinding) of a continuous flow of cylindrical parts in automated production lines. The technical result is a reduction in surface roughness, an increase in the accuracy of the geometric shape of cylindrical parts processed in a stream, the possibility of application in automated production lines. Under the action of vibrations communicated to the container (3), the working transport trays (6, 7) and the transport tray (10) from the inertial vibrator (11), the part oriented by the loading device (1) perpendicular to the longitudinal axis of the working transport tray (6) moves along it along a flat oscillating surface having an abrasive coating (8). The part from the working transport tray (8) enters the transport tray (10), through which it is fed to the abrasive coating (9) of the working transport tray (7).

1 n P. f-ly

3 s P. f-ly

2 ill.

Description

The utility model relates to the field of vibration processing and can be used for finishing processing, in particular, for fine-tuning (lapping) a continuous flow of cylindrical parts in automated production lines.

A device for vibration processing of surfaces of parts, containing a U-shaped working chamber (container), is rigidly mounted on a rectangular vibrating platform. The chamber has nozzles for supplying and discharging process fluid and is filled with abrasive granules up to 2/3 of the volume. Details are loaded into the chamber, which uses vibroplatforms to communicate oscillatory movements (see Babichev A.P., Babichev I.A. in the book "Fundamentals of Vibration Technology" publishing center of the Don State Technical University, Rostov-on-Don, 1999 ., p. 128-135) [1].

A known vibration machine (see application RU No. 95102707 A1 6 MPK V24V 31/06, published March 10, 1997) [2], which achieves an increase in productivity and quality of processing of parts due to the intensification of the movement of the working medium in the container volume. For this, the vibrating machine has an elastically mounted container, the inner surface of which is made in the form of a bellows, guide columns and a vibration exciter. Details are fixed in the container using locks and processed by the working environment.

A known installation for vibration processing of parts (see patent RU No. 2158670 C2 7 IPC V24V 31/06 published 10.11.2000) [3], which contains a U-shaped camera (container) with a vibration exciter, inside the container there is a rod with parts attached to it. Fluctuations in the rod allow you to intensify the processing of interscapular channels of parts of the type

"Turbine" without additional energy costs. However, known installations are not adapted for fine-tuning (lapping) surfaces of parts.

The closest in technical essence to the claimed invention is a device for vibrational abrasive processing (RU 2275286, 7 IPC V24V 31/067, 2006.04.27) [4], taken as a prototype. The prototype device contains a loading and unloading device, a container, elastically mounted on the base. At the bottom of the container mounted vibrators. The container is made of belt-mounted rigidly mounted one under the other and connected into a single technological chain screw tetrahedral columns. The design of the container provides a longitudinal cascade movement of the masses of processed parts and particles of abrasive materials from loading to unloading and simultaneous intensive mixing with a large amplitude and a complex trajectory of movement, which provides finishing and hardening of parts with granular medium, but does not allow fine-tuning of cylindrical parts with high accuracy sizes and shapes.

The problem solved by the invention is to ensure the refinement of cylindrical parts with high accuracy of size and shape by achieving a new technical result - vibration processing of cylindrical parts by rolling on a flat vibrating surface coated with abrasive material, with limited lateral (axial) displacements.

The technical result is achieved by the fact that the device for vibrational abrasive processing of cylindrical parts contains a base on which a container with an inertial vibrator is installed by means of springs, equipped with means for loading and unloading the parts. Inside the container, a means for transporting parts during the abrasive treatment is installed, containing transport channels mounted on a belt level.

According to a utility model, a means for transporting parts during abrasive processing comprises at least two removable parallel

and inclined to the horizontal plane of the working transport tray, made in the form of a rectangular groove, the bottom of which is equipped with an abrasive coating. Between the working transport trays, a transport tray is installed having an angle of inclination to the horizontal plane to the side opposite to the inclination of the working transport tray, and each working transport tray is connected to the supply and removal systems of cutting fluid (coolant).

In the particular case of execution:

- working transport trays have an angle of inclination α to the horizontal plane of 0.5-1 °;

- transport trays have an angle of inclination β to the horizontal plane, the minimum value of which ensures the rolling of parts under the action of gravity;

- the angle between the axis of the vibrator shaft and the longitudinal axis of the working transport tray is 75-90 °.

This allows you to ensure surface roughness in the range of 0.16-0.25 microns and a deviation of sizes from the nominal value in the range of 5-15 microns, which was previously achieved only by processing a single part, but not in the flow of parts.

The utility model is illustrated by drawings. Figure 1 shows a General view of the device in section, where α is the angle of inclination of the working transport trays to the horizontal plane, β is the angle of inclination of the return transport tray to the horizontal plane. Figure 2 - diagram of the movement of cylindrical parts along the working transport tray during vibration processing, where a is a longitudinal section of the working transport tray with the part, α is the angle of inclination of the working transport tray to the horizontal plane, V ₀ is the peripheral speed of movement of the cylindrical part, b - a top view of the working transport tray with the detail, γ is the angle between the axis of the vibrator shaft and the longitudinal axis of the working transport tray, in is the cross section of the working

transport tray with the part where I _ce - the speed of the reciprocating motion of the cylindrical part.

A device for vibrational abrasive machining of cylindrical parts (Fig. 1) contains a base 1 on which a container 3 is mounted by means of springs 2 with means for loading 4, providing an oriented supply of parts, and unloading 5. At least two parallel are fixed inside the container 3 removable working transport trays 6, 7, made in the form of rectangular gutters, each of which has a slope to the horizontal plane from the side of the workpiece at an angle α = 0.5-1 ° (figa). The working surfaces of the trays 6, 7 are equipped with rigidly fixed abrasive coatings 8, 9, respectively. Inside the container between the working transport trays 6, 7 there is a transport tray 10 formed by the vertical walls of the container 3 and a metal flat surface that has an angle of inclination β relative to the horizontal plane to the side opposite to the inclination of the working transport trays, the minimum value of which is selected from the condition of ensuring free rolling parts to the working transport tray 7. On the outside of the base of the container 3 is installed an inertial vibrator 11, the shaft of which receives Electric drive (not shown in Fig. 1). The angle γ (figure 2, b) between the axis of the vibrator shaft and the longitudinal axis of the working transport tray is 75-90 °. Working transport trays 6, 7 are connected to the supply system 12 and the outlet 13 of the cutting fluid (coolant).

The inertial vibrator 11 vibrates the container 3, the working transport trays 6, 7 and the transport tray 10. Under the action of vibration, the part oriented perpendicular to the longitudinal axis of the working transport tray 6 moves along it along a flat oscillating surface having an abrasive coating 8, with limited side ( axial) displacements. In this case, for each period of oscillation, part 14 (Fig. 2) moves along the path section together with the working transport tray 6, then

there is a detachment of the part from the surface of the tray and its free flight on the path section, after which the part collides with the surface of the tray having an abrasive coating 8, slides and rolls over the abrasive coating at a peripheral speed V ₀ (Fig. 2a), making a reciprocating movement across working transport tray with reciprocating speed V _v.p. (figv). In this case, the abrasive treatment of the part and its simultaneous transportation towards the exit. The part from the working transport tray 8 enters the transport tray 10, through which it is fed to the abrasive coating 9 of the second working transport tray 7. Processing of the part on the working transport trays 8, 7 is accompanied by a continuous supply of coolant from the supply system 12. The spent coolant enters through the exhaust system 13 into the sump tank (not shown in FIG. 1).

As laboratory tests of the installation showed, the processing accuracy is 5-15 microns, the surface roughness depending on the granularity of the abrasive coating is 0.16-0.25 microns. This ensures a decrease in surface roughness, increasing the accuracy of the geometric shape of cylindrical parts.

The advantages of the device are:

- effective use in automated production lines;

- low energy intensity;

- lack of rubbing and wearing parts;

- safety of operation.

Information sources

1. Babichev A.P., Babichev I.A. in the book "Fundamentals of Vibration Technology" publishing center of the Don State Technical University, Rostov-on-Don, 1999, pp. 128-135.

2. RU 95102707 A1 6 IPC V24V 31/06 published on 03/10/97. 3. RU 2158670 C2 7 IPC В24В 31/06 published on 10.11.2000. four. RU 2275286, 7 IPC V24V 31/067, 2006.04.27 - prototype.

Claims (4)

1. A device for vibrational abrasive processing of cylindrical parts, containing a base on which a container with an inertial vibrator is installed by means of springs, equipped with means for loading and unloading parts, a means for transporting parts during abrasive processing is installed inside the container, containing transport belts channels, characterized in that the means for transporting parts during abrasive processing contains at least two removable parallels solid and inclined to the horizontal plane of the working transport chutes, made in the form of a rectangular chute, the bottom of which is equipped with an abrasive coating, between the working transport chutes there is a transport chute having an angle of inclination to the horizontal plane to the side opposite to the inclination of the working transport chute, and each working transport chute connected to the systems of supply and removal of cutting fluid (coolant). 2. The device for vibrational abrasive treatment of cylindrical parts according to claim 1, characterized in that the working transport trays have an angle of inclination α to the horizontal plane of 0.5-1 °. 3. The device for vibrational abrasive machining of cylindrical parts according to claim 1, characterized in that the transport trays have an angle of inclination β to a horizontal plane, the minimum value of which ensures rolling of the parts under the action of gravity. 4. The device for vibrational abrasive treatment of cylindrical parts according to claim 1, characterized in that the angle between the axis of the vibrator shaft and the longitudinal axis of the working transport tray is 75-90 °.