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Study of influence of traverse speed and abrasive mass flowrate in abrasive water jet machining of gemstones

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Abstract

Abrasive water jet (AWJ) machining is characterized by its versatility, i.e., it can be applied to a wide variety of materials. Currently, one important application is for manufacturing gem artifacts, especially agate, which is the largest gemological material produced in the state of Rio Grande do Sul. However, one of the main obstacles to its popularization is the cost associated with the process, due to the high abrasive consumption required for a good quality surface finish. In this sense, this research paper presents a study of the influence of the main process parameters (traverse speed and abrasive mass flow rate) on the surface finish of agates machined by AWJ. The experimental procedure used three different traverse speeds, four abrasive mass flow rate in two different thicknesses of agate’s plates. Surface roughness and angle of striation marks were observed for different depths from the jet entrance surface. Results were analyzed using analysis of variance (ANOVA). Through the study, it was found that the machined surface finish varies according to the depth from the entrance surface of the abrasive jet. Also, it was concluded that the surface finish of the machined surface by AWJ (surface roughness and striation marks) of the agate’s plates machined by AWJ exhibits similar results for both thicknesses tested. ANOVA showed that the traverse speed is more significant than abrasive mass flow rate for the material studied with respect to the surface finish. Thus, for a small material thickness, it is possible to use high traverse speed and low abrasive mass flow rate which makes the process more economical.

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Authors and Affiliations

  1. Departamento de Engenharia Mecânica DEMEC, Universidade Federal do Rio Grande do Sul - UFRGS, Porto Alegre, Brazil

    Carlos Edmundo de Abreu e Lima, Rodrigo Lebrón, André João de Souza, Ney Francisco Ferreira & Patric Daniel Neis

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  1. Carlos Edmundo de Abreu e Lima
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  2. Rodrigo Lebrón
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  3. André João de Souza
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  4. Ney Francisco Ferreira
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  5. Patric Daniel Neis
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Correspondence to Carlos Edmundo de Abreu e Lima.

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de Abreu e Lima, C.E., Lebrón, R., de Souza, A.J. et al. Study of influence of traverse speed and abrasive mass flowrate in abrasive water jet machining of gemstones. Int J Adv Manuf Technol 83, 77–87 (2016). https://doi.org/10.1007/s00170-015-7529-9

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  • DOI: https://doi.org/10.1007/s00170-015-7529-9

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