CN1775475B - Vibrotumbling machine - Google Patents

Abstract

The present invention provides a vibrotumbling machine (10) in particular for inner surfaces of a manufactured product (18) by means of an abrasive mix comprising several elements of not particularly hard material, abrasive particles, water and additives, the machine (10) comprises vibrating means (20,30) to cause a relative movement between the various elements of the abrasive mix and the manufactured product (18) in order to obtain a surface processing of the same, the vibrating means are associated with the manufactured product (18) to make it vibrate directly, thus obtaining the surface processing of the same. The machine (10) comprises pressure means for obtaining a forced flow of the abrasive mix with respect to the manufactured product (18), in particular for obtaining a forced flow inside at least one cavity of the manufactured product (18).

Description

Vibration tumbler

technical field

The present invention relates to a vibratory tumbling machine, in particular to a vibratory tumbling machine suitable for processing articles having at least one cavity or inner surface.

Background technique

The vibratory tumbling process represents an economical solution for removing surface layers in the case of at least one surface, in particular obtained by electroerosion techniques.

The surface layer is in fact obtained by galvanic erosion, wherein said surface layer is generally hard and brittle, or in any case for example has microstructural and morphological features not permissible for the particular type of application.

An example of an article of this type comprises, inter alia, an object having at least one cavity, such as a rotor.

Treatment of the outer surface by vibratory tumbling is simple and economical since the article to be treated is immersed in the abrasive mixture.

The article is held in a container which in turn is subjected to vibrating means to vibrate.

Abrasive mixtures generally include a variety of generally not particularly hard material components known by the English term "media", abrasive grains, water and additives.

The function of the various material constituents, ie, the media, is to impart kinetic energy to the abrasive particles so that these material constituents impinge on the article to be treated.

Each media component is surrounded by abrasive grains present in the abrasive mixture and receives vibrations from the vibrating means through the container.

In this manner, the various components of the abrasive mixture impinge on the outer surface of the article being treated, causing the abrasive particles to rub against said same surface.

By rubbing the surface, the particles cause the removal of material on the outer surface of the article, resulting in abrasion of the surface layer and removal of material therefrom.

Thus, a vibratory movement is imparted to the abrasive mixture machines currently on the market for vibratory tumbling or vibratory finishing, whereupon this vibratory movement is transmitted to the article to be treated or the smoothed surface.

In other words, vibrations are transmitted to the article to be treated through the abrasive mixture, wherein the article is completely submerged in the abrasive mixture; the abrasive mixture is held in a container subjected to vibration.

The vibrations are in turn transmitted to the abrasive mixture and thus to the article.

Vibration of the abrasive mixture induced by the vibrating device exclusively produces a relative movement of the abrasive mixture with respect to the surface of the product to be treated.

A disadvantage of current machines is therefore that the abrasive mixture in the internal cavities does not flow, resulting in a so-called "plugging" effect, thus making the abrasive mixture in grooves, openings, cavities and narrower fins Relative motion is reduced or completely absent.

Efficient treatment of the internal surfaces of the product to be treated is not possible due to the fact that an effective relative movement between the abrasive mixture and the often inaccessible internal surfaces of the product to be treated is not possible with existing machines.

This leads to the fact that it is often necessary to obtain the product by a different process, usually with higher operating costs and at the same time with reduced quality, since it is not possible to treat said inner surface by the abrasive action of the abrasive mixture.

Even when it is possible to use vibratory abrasers, it is not possible to effectively treat internal surfaces such as those of grooves and especially of thin cavities such as in some rotors with narrow sections.

In this case, the grinding device reaches the inner surface without vibrational energy, or worse is held inside the groove or cavity.

In both cases, no effective action of the abrasive mixture on said inner surface accessible by rather thin and narrow sections, where the section minimum is in the range of 5-10 mm, cannot be obtained.

Another disadvantage is that in any case, for wider sections, mainly near the outside of the product to be treated, the surface is subjected to uneven grinding.

This is due to a change in direction and velocity resulting in a higher frequency and impact strength of the abrasive mixture components on the object.

Contents of the invention

The object of the present invention is to provide a vibratory tumbler capable of treating the inner surfaces even when the grooves, cavities, casings and holes are thin and narrow.

Another object of the invention is to produce a vibratory tumbler capable of uniformly removing material from at least one inner surface of an article to be treated having at least one cavity or indentation.

Yet another object of the present invention is to provide a vibratory tumbler capable of efficiently and uniformly treating inner and outer surfaces.

Another object of the present invention is to provide a simple and economical vibrating tumbler.

These objects according to the present invention are achieved by producing a vibratory tumbler according to technical solution 1 .

Other technical features of the present invention are shown in other technical solutions that follow.

Description of drawings

The technical features and advantages of the vibratory tumbling machine according to the present invention will be more apparent through the following exemplary and non-limiting description combined with the schematic drawings. in:

Fig. 1 is the right perspective view of a preferred embodiment of vibratory tumbler according to the present invention;

Fig. 2 is a partial cross-sectional schematic diagram of the vibratory tumbler shown in Fig. 1;

Figure 3 shows a detail of Figure 2; and

FIG. 4 shows a detail from FIG. 1 .

Detailed ways

Referring to these figures, there is shown a machine 10 for vibratory tumbling of an article 18, such as a rotor, through an abrasive mixture comprising a variety of material components that are not particularly hard, abrasive particles, water, and additives.

The machine 10 includes vibratory means for inducing relative motion between the abrasive mixture and the article 18 for processing thereof.

Said vibrating means are associated with said article 18 so as to directly vibrate it and effect its treatment.

The vibrating device is preferably associated with the article 18 via a rod 20 or the vibrating device is directly connected to the article 18 .

Said machine 10 also comprises pressure means for obtaining a pressurized flow of said abrasive mixture relative to said article 18, in particular for obtaining a pressure of a pressurized flow inside at least one cavity of said article 18 device.

The pressure means preferably comprises a cylinder of abrasive mixture positioned above the article 18 so that the pressurization creates a relative flow relative to the same portion of the abrasive mixture proximate to the article 18 to uniformly remove material therefrom.

Simultaneously, as shown in Figure 3, commercial abrasive mixture (preparation, abrasive product, water, additive) is supplied to described rotor 18 through rubber collector 62, and described rubber collector receives from and hangs about 1000 millimeter above storage The mixture in the delivery pipe 61 to which the tank 60 is connected.

According to a preferred embodiment, said machine 10 preferably comprises a frame 12 to which said rod 20 is constrained by means of elastic means 40, such as in particular a series of springs.

The rod 20 is preferably constrained at the first upper end 21 of the frame 12 by means of a series of vertical guides 45 and is suspended from the frame by means of the elastic means 40 which allow the The rod 20 undergoes a relative movement in the vertical direction with respect to said frame 12 .

The vertical rod 20 also has a lower end 22 on which the rotor 18 is tightened and the upper end 21 is connected to vibration means such as in particular an unbalanced motor 30 transmitting vibrations thereto. connected.

Said motor 30 is preferably located above said frame 12 and said motor 30 is preferably constrained to said upper end 21 of said rod 20 by means of a disc 24 integral with said rod 20 .

The vibration device is thus directly associated with the product 18 to be treated and is therefore able to transmit vibrations thereto without any type of damping.

Said machine 10 preferably comprises a rubber collector 62 for introducing said mixture into or onto said at least one cavity of said article 18 .

The pressure device preferably includes a storage tank 60 and a delivery pipeline 61, the delivery pipeline 61 comprising a first end and a second end, the first end being located downstream of the storage tank 60, and the second end The ends are located upstream of the article 18 to allow flow of the abrasive mixture relative to the article 18 .

The storage tank 60 is located above the conveying pipe 61 , and a rubber collector 62 is connected below the conveying pipe 61 to introduce the abrasive mixture into the at least one cavity of the product 18 .

The second end of the delivery conduit 61 is preferably connected upstream of the rubber collector 62 to allow the abrasive mixture to flow relative to the article 18 .

The storage tank 60 is preferably suspended about 1000 mm above the article 18 such that the weight of the abrasive mixture cylinder contained within the delivery conduit 61 is in contact with the article 18, or close to the article 18. 18 part of the abrasive mix creates pressure.

In this manner, the portion of the abrasive mixture is forced into flow relative to the article 18, thereby uniformly removing material from its surface.

The machine 10 preferably includes a basin-shaped formation 63 constrained to the article, surrounding the article so as to allow simultaneous treatment of the inner and outer surfaces of the article.

After flowing through the at least one cavity of the rotor 18, the abrasive mixture is actually collected into the basin 63 and in this way also acts on the outer surface of the article 18. dealt with.

This condition continues until the abrasive mixture reaches the maximum height of the tub 63 , from which it will overflow and be collected in a container 64 restrained on the frame 12 .

The machine 10 preferably includes the container 64 for collecting the abrasive mixture when overflowing from the basin 63 .

The drained abrasive mixture collected in the container 64 is then flushed, mixed with fresh abrasive mixture, and reintroduced into the upper storage tank 60 .

This function can be performed by manual means or by means of automatic means, thus providing a continuous working cycle.

According to the present invention, the grinder 10 has the following innovative technical features:

- the grinder transmits vibrations directly to the article to be treated, rather than through the abrasive mixture;

• The fluid is pressurized to produce a flow relative to the article to be treated, in particular relative to the inner surface of eg a particularly thin and narrow cavity, hole or groove.

By directly vibrating the object to be treated, it is thereby possible to obtain a relative movement between the inner surface to be treated having a very narrow section and the stream of abrasive mixture flowing under pressure in said at least one inner cavity, A vibratory abrasive effect is thereby obtained which is capable of smoothing the surface or in any case removing material evenly therefrom.

The stream of abrasive mixture is forced to flow inboard at the at least one interior surface by a pressure device, thereby enhancing the relative movement between the abrasive particles dispersed in the mixture and the interior surface of the interior cavity to be treated.

This causes the abrasive particles to impinge on at least one inner surface to be treated, producing an abrasive effect on the surface itself.

Use of pressure means to press the abrasive mixture against the at least one interior surface to be treated advantageously prevents stagnation of the abrasive mixture in the bores and cavities of rotors and other components, thereby emptying the abrasive material.

The vibratory tumbler of the present invention is advantageously very efficient for interior surfaces that are difficult to reach or access, especially for interior surfaces such as grooves, cavities and holes.

It can be seen that the vibratory tumbling machine according to the present invention achieves the above-mentioned purpose.

The vibratory tumbler according to the invention thus conceived is subject to numerous modifications and variations all included within the scope of the same inventive idea.

Furthermore, in practice, the materials used, but also the dimensions and components can be modified according to technical requirements.

Claims (10)

1. One kind by comprise to abrasive grain transmit kinetic energy multiple be not the Vibrotumbling machine (10) that is used for goods (18) inner surface of the abrasive mixture of hard especially material composition, abrasive grain, water and additive; Said Vibrotumbling machine (10) comprises that the relative motion that is used to cause between said abrasive mixture and the said goods (18) is to realize that said goods (18) are carried out the surface-treated vibrating device; It is characterized in that; Said vibrating device is associated with said goods (18); Thereby said goods (18) are directly vibrated and realize surface treatment said goods (18); And said Vibrotumbling machine (10) comprises the pressure apparatus that is used for obtaining with respect to the pressurized stream of the said abrasive mixture of said goods (18); Said Vibrotumbling machine (10) comprises the basin shape structure (63) that is constrained on the said goods; Be suspended on storage tank (60) on the said goods (18) make the weight be contained in the abrasive mixture cylinder in the conveyance conduit (61) with abrasive mixture that said goods (18) contact on produce pressure, wherein said conveyance conduit (61) comprises first end and the second end, said first end is connected to the downstream of storage tank (60); And said the second end is connected to the upper reaches of said goods (18); Thereby allow said abrasive mixture mobile with respect to said goods (18), it is characterized in that, said basin shape structure centers on said goods (18) thereby allows to be handled the inner surface and the outer surface of said goods simultaneously.
2. 2. Vibrotumbling machine according to claim 1 (10) is characterized in that, said vibrating device is associated with said goods (18) through bar (20).
3. 3. Vibrotumbling machine according to claim 1 (10) is characterized in that, said vibrating device is arrived on the said goods (18) by immediate constraint.
4. 4. according to each described Vibrotumbling machine (10) among the claim 1-3, it is characterized in that said vibrating device comprises non-equilibrium motor (30).
5. 5. according to each described Vibrotumbling machine (10) among the claim 1-3; It is characterized in that; Said pressure apparatus comprises the abrasive mixture cylinder that is positioned at said goods (18) top; It is mobile relatively that thereby the part of the approaching said goods (18) of pressurization abrasive mixture self produces with respect to said goods (18), so that from said goods (18), remove material equably.
6. 6. Vibrotumbling machine according to claim 2 (10) is characterized in that, said Vibrotumbling machine comprises framework (12), and said bar (20) is attached on the said framework (12) through elastic device (40).
7. 7. according to each described Vibrotumbling machine (10) among the claim 1-3, it is characterized in that said Vibrotumbling machine comprises in order to the rubber gatherer (62) at least one cavity that said abrasive mixture is imported said goods (18).
8. 8. Vibrotumbling machine according to claim 7 (10) is characterized in that, the said the second end of said conveyance conduit (61) is connected to the upper reaches of said gatherer (62), thereby allows said abrasive mixture mobile with respect to said goods (18).
9. 9. according to each described Vibrotumbling machine (10) among the claim 1-3, it is characterized in that said Vibrotumbling machine comprises the container (64) that is used to collect said abrasive mixture.
10. 10. Vibrotumbling machine according to claim 1 (10); It is characterized in that the said pressure apparatus that is used for obtaining with respect to the pressurized stream of the said abrasive mixture of said goods (18) is the pressure apparatus that is used for obtaining in the pressurized stream of at least one cavity inside of said goods (18).

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