Abstract
This paper deals with an assessment of the machined surface created by abrasive waterjet technology regarding its cutting performance versus profile, lagging and waterjet angle assessments. The results of the experiments presented in this study are with regard to Carrara marble. The machined surfaces were measured in seven different locations across a 40 mm depth of cut by a high precision contact-type profilometer and thus assessed using the standardized amplitude parameters of the profile distribution. The lagging and waterjet angle were also evaluated by creating a digital photo of the machined surface together with a reference gauge. The existence of machining marks on the machined surface has been mostly noticeable in the bottom zone around ~20 mm depth of cut down to jet exit. This investigation leads to a conclusion that, stand-off distance and traverse rate play the roles of the utmost importance in considerations of the machined surface quality in contrast to abrasive mass flow rate. In addition, while the striation zone (rough surface) cannot be eliminated entirely, by selecting proper process parameters, a smooth cutting machined surface can be accomplished.
Highlights
The main advantage of Abrasive waterjet (AWJ) technology is the elimination of the thermal effects due to the cutting process of using the medium formed of fluid on the workpiece so that there is no thermal degradation and it is not Published analyses and repeatability performance data relating to the effects of the stand-off distance (SOD), traverse rate (TR) and abrasive mass flow rate (AMFR) machining process factors on the surface roughness, waviness and profile, e.g. [6]
An investigation of the cutting performance and erosive process in abrasive waterjet (AWJ) machining of Carrara marble material is presented. It demonstrates that AWJ cutting can generate a good machined surface quality at high production rates if the cutting parameters are suitably selected
The abrasive waterjet process parameters were successfully employed in contour machining of up to 40 mm thick Carrara marble that is being used in Al-Masjid Al-Haram, The Holy Mosque, in Makkah, KSA, for internal flooring and internal/external cladding application
Summary
The machined surface quality control of Carrara marble is a very significant part of the surface preparation in all categories of technologies that are used in Al-Masjid Al-Haram, The Holy Mosque, in Makkah, KSA, for internal flooring. Abrasive waterjet (AWJ) technology is a material removal process [4] [5]. It is a state-of-the-art non-traditional machining (NTM) process [6] [7]. This technology generates a special surface on the machined material, which should be studied precisely when assessing the parameters of the surface topography.
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