Vibrotumbling machine

Abstract

A vibratory tumbler (10) especially for inner surfaces of articles (18) by means of an abrasive mixture comprising a plurality of not particularly hard material components, abrasive grains, water and additives, said vibratory tumbler (10) comprising vibrating means for inducing relative motion between the various components of said abrasive mixture and said article (18) to effect surface treatment thereof, said vibrating means being associated with said article (18) such that It vibrates directly and achieves its surface treatment. Said vibratory tumbler (10) comprises pressure means for obtaining a pressurized flow of said abrasive mixture relative to said article (18), in particular for obtaining at least one cavity in said article (18) Internal pressure device for pressurized flow.

Description

technical field [0001] 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 [0002] 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. [0003] 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. [0004] An example of an article of this type comprises, inter alia, an object having at least one cavity, such as a rotor. [0005] Treatment of the outer surface by vibratory tumbling is simple and economical since the article to be treated is immersed in the abrasive mixture. [0006] The article is hel...

AI Technical Summary

Problems solved by technology

[0016] 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 Decreased or complete absence of relative motion

[0022] 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

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