Manufacture of an abrasive jet machining (AJM) equipment adapted for the treatment of rotary flexion fatigue specimens

Abstract

The influence of micro-geometric irregularities on fatigue strength and, in particular, surface topography is widely accepted. The different machining processes generate surface roughness on machined parts that may significantly modify their fatigue behaviour and compromise their use in components where structural stability is required. Therefore, the study of these materials behavior under cyclic loading stresses becomes highly relevant. The aim of this work is to design and manufacture an abrasive jet machining machine, in order to improve the surface roughness in the dry turning of aluminium alloys, using similar parameters to any equivalent industrial equipment. For this purpose, several components from obsolete machines belonging to the Manufacturing Engineering Department of the University of Malaga have been reused, to reduce the final cost. Several test have been carried out with the aim of testing the manufactured equipment. The experimental data have shown results in line with those offered by others in industrial use for similar abrasives and processing material. The equipment has been built in accordance with the ISO 12100:2010 Safety of machinery - General principles for design - Risk assessment and risk reduction.