The Aplication of Vibro – Abrasive Machining for Smoothing of Castings

Abstract

The paper presents the production problems related to casting using precision casting methods. The essential adverse effect of the casting process is the presence of burrs understood as oversize material necessary to remove the next finishing operations. In addition, the surfaces of the cast often characterized by a porous structure. One of the methods to improve the smoothness of the area proposed by the authors is the use of vibro-abrasive finishing. This type of treatment is widely used in the treatment of finishing small objects as well as complex shapes. Objects in the form of casting in the first step was treated with aggressive deburring polyester matrix abrasive media. The second stage was polishing, with using smoothing porcelain media. The study evaluated the effect of vibro-abrasive machining typical cast on the basic parameters of the geometric structure of the surface. Observations using optical microscope Nicon Eclipse MA 200 compared changes in surface microstructure and the effect of deburring. Clearly we can say that vibro-abrasive machining an effective way of reducing the size of burrs, smoothing and lightening the surface of objects made by casting.

Vibratory Machining Effect on the Properties of the Aaluminum Alloys Surface

“…Commonly vibratory machining is also referred to as vibration, rotor machining, rotor finish, tumbling, trowelling, or micro machining processes [11,12]. Vibratory machining is often used as a finishing, to deburring, remove burrs, rounding edge or smoothing to polishing to gloss [13]. The process takes place in closed tumbler containing the workpieces, working medium in the form of suitably selected abrasive or polishing media, and liquid lubricant -working fluid [14][15][16].…”

The Effect of Selected Parameters of Vibro-Abrasive Processing on the Surface Quality of Products Made of 6082 Aluminium Alloy

“…When selecting appropriate processing parameters, preliminary (exploratory) tests are often conducted in order to make a preliminary assessment of the influence of the selected parameters of vibratory processing on the obtained quality parameters of the material processed. Since the expected quality of vibro-abrasive processing is influenced by a number of variables, preliminary tests are often carried out multiple times [19,20].…”

Tests of finishing work of parts cut using loose fittings

“…Proces chemiczno-mechanicznej obróbki wykończenio-wej luźnymi kształtkami w wibrujących pojemnikach jest określany mianem obróbki wibrościernej [1][2][3]. Często też stosuje się nazwy: obróbka wibracyjna lub roto-wibracyjna, bębnowanie i trowalizacja, a używając nomenklatury anglosaskiej - vibratory mass finising, rotofinish lub tumbling [4][5][6].…”