Vibratory Machining Effect on the Properties of the Aaluminum Alloys Surface

Abstract

The article presents an example of finishing treatment for aluminum alloys with the use of vibration machining, with loose abrasive media in a closed tumbler. For the analysis of selected properties of the surface layer prepared flat samples of aluminum alloy PA6/2017 in the state after recrystallization. The samples in the first stage were subjected to a treatment of deburring using ceramic media. In a second step polishing process performed with a strengthening metal media. In addition, for comparative purposes was considered. only the case of metal polishing. The prepared samples were subjected to hardness tests and a tangential tensile test. As a result of finishing with vibratory machining, it was possible to remove burrs, flash, rounding sharp edges, smoothing and lightening the surface of objects made. The basic parameters of the surface geometry were obtained using the Talysurf CCI Lite -Taylor Hobson optical profiler. As a result of the tests it can be stated that the greatest reduction of surface roughness and mass loss occurs in the first minutes of the process. Mechanical tests have shown that the most advantageous high values of tensile strength and hardness are obtained with two-stage vibration treatment, -combination of deburring and polishing. Moreover the use of metal media resulted in the strengthening of the surface by pressure deburring with metal media.

Influence of Postprocessing on Wear Resistance of Aerospace Steel Parts Produced by Laser Powder Bed Fusion

“…Furthermore, the methods based on mechanical machining often leave cutting traces or traces of erosion such as those from cavitation-abrasive finishing that can dramatically influence the functional surfaces' wear resistance. At the same time, the positive influence of local heating and remelting with the formation of a more fine-grained submicron structure while avoiding volumetric spreading and high quenching temperatures of the sample during laser-plasma, ion-plasma, and electron beam polishing, and while strengthening the surface and subsurface layers through plastic deformation, vibratory tumbling [30][31][32][33][34] for large-scale parts, and etching [35][36][37], in combination with reduced roughness can significantly improve the wear resistance of the surfaces in the friction pair [38,39] and ensure tight contact with detachable fasteners of parts when subsequent heat treatment reduces anisotropy of the exploitation properties [40][41][42][43][44]. Surface roughness parameters of additively manufactured parts are critical for the nuclear industry to provide smooth contact between rods and volumetric mesh structures [45,46] to ensure smooth surfaces of nozzles and dies [47,48].…”

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].…”

Influence of Cold Work on the Efficiency of Vibratory Machining

“…Currently, container processing is widely used in many industries. The use of vibrating devices as compared to rotary machine tools allows for a significant reduction of machine times, required to obtain the assumed parameters of the geometric structure of the surface [9,10].…”

“…They can be made as abrasive media with a ceramic or resin binder, e.g. polyester, porcelain, metal, but also in the form of shapes made of materials of natural origin such as, for example, granules from nut shells, corn, rice, shavings, or shapes or wood chips [13,14]. The use of appropriately selected machining fluids allows to increase the effectiveness of the processes of mechanical abrasion [15], smoothing or polishing.…”