Quality of the Cut Surfaces Processed by AWJC as a Function of the Distance between the Cutting Head and Working Sample

Abstract

Water jet cutting is one of the newest techniques in non-conventional machining processes. It is a flexible technology since the same equipment can be used to cut virtually any material, such as steel stainless steel, high-nickel alloys and polymer composites (usually, for these materials, the water jet is mixed with an abrasive material, the process being known as abrasive water jet cutting - AWJC) . Compared with the classical technologies, water jet cutting presents the following advantages: very low side forces during machining, it is rapid, it is silent, no thermal distortion, a good cutting accuracy and minimal burrs. To optimize the process, it is necessary to analyze the influence of process parameters on the quality of cut. The aim of this paper is to analyze the influence of distance between the cutting head and the working sample on the quality of cut, quantified by the following parameters: width of the processed surface at the jet inlet, jet outlet, deviation from perpendicularity, inclination angle and roughness.

Considerations on material thickness influence on the AWJ processing quality of an aluminium alloy

“…The newest technologies are the unconventional technologies, which use the power of electricity, water, air, chemicals etc. Among them, waterjet processing is of great interest for different industrial fields since it can be used for processing of both, soft or hard metallic and non-metallic materials (the processing of hard materials requires the addition into the water jet of an abrasive material and the process is named abrasive waterjet processing -AWJ) [1,2]. Besides, this technology has many other advantages, such as: it is environmentally friendly, it does not degrade thermally the processed surface, in most of cases no additional processing is required, it allows obtaining various complex shapes (using 5-axis machines) since it is CNC controlled.…”