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Investigation of the influence of the AWJ-specific energy on the cutting kerf profile on aluminium 6082

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Abstract

This study introduces the abrasive waterjet specific energy as a novel physical quantity to characterize the taper ratio in abrasive waterjet cutting. Said quantity was defined as a proper combination of the most influential control factors. A series of abrasive waterjet cutting experiments on aluminium 6082, were conducted, according to the design of experiments methodology. For each experimental run, the width of the kerf profile was measured and characterized in terms of taper ratio. The effect of the abrasive waterjet specific energy and the main process parameters on the measured quantities were investigated. Results showed that inside the experimental range of the process parameters, the abrasive waterjet specific energy correlates well with the taper ratio. As a conclusion, different combinations of the control factors (water pressure, abrasive mass flow rate, feed rate), corresponding to the same level of abrasive waterjet specific energy, produced the same cutting kerf geometry as well as the same taper ratio. This result gives freedom to the waterjet users in selecting the best parameter combination according to some criteria (e.g., time or cost) for achieving the target AWJ-specific energy and the consequent kerf quality.

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Data availability

The data that support the findings of this study are available on request from the corresponding author.

Abbreviations

\(p\) MPa:

Water pressure

\({d}_{{\text{n}}}\) mm:

Primary orifice diameter

\(\rho\) kg∙m− 3 :

Water density

\({v}_{{\text{th}}}\) m∙s− 1 :

Waterjet theoretical velocity

\(n,L\) -, MPa:

Constants

\({v}_{{\text{j}}}\) m∙s− 1 :

Real jet velocity

\(\psi\) -:

Compressibility coefficient

\({c}_{{\text{v}}}\) -:

Velocity coefficient

\({c}_{{\text{d}}}\) -:

Discharge coefficient

\({\dot{m}}_{{\text{w}}}\) kg∙s− 1 :

Water mass flow rate

\({Q}_{{\text{w}}}\) m3∙s− 1 :

Water volume flow rate

\({S}_{n}\) mm2 :

Nominal cross-sectional area of the orifice

\({P}_{{\text{hydr}}}\) W:

Jet hydraulic power

\({\dot{m}}_{{\text{a}}}\) kg∙min− 1 :

Abrasive mass flow rate

\({d}_{{\text{f}}}\) mm:

Focuser tube diameter

sod mm:

Standoff distance

\({v}_{{\text{f}}}\) mm∙min− 1 :

Feed rate

\({P}_{{\text{part}}}\) W:

Jet power

\({E}_{{\text{sp}}}\) J∙mm− 1 :

Abrasive waterjet specific energy

\(c\) J∙mm− 3 :

Material volume removed per unit energy

\(h\) mm:

Sample thickness

\(w\) mm:

Kerf width

\({T}_{{\text{R}}}\) mm/mm:

Taper ratio

\({w}_{{\text{r}}}(z)\) mm:

Right side of the kerf profile

\({w}_{{\text{l}}}(z)\) mm:

Left side of the kerf profile

\({w}_{{\text{p}}}\left(z\right)\) mm:

Half kerf profile

\({\overline{w} }_{{\text{p}}}\left(z\right)\) mm:

Average half kerf profile

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This research received no external funding.

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Authors and Affiliations

  1. Dipartimento di Meccanica, Politecnico di Milano, Via Giuseppe La Masa 1, 20156, Milan, Italy

    Francesco Perotti, Michele Monno & Massimiliano Annoni

  2. Consorzio MUSP Macchine Utensili Sistemi di Produzione, via Callegari, 29122, Piacenza, Italy

    Francesco Perotti

Authors
  1. Francesco Perotti
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  2. Michele Monno
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  3. Massimiliano Annoni
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Contributions

F.P conceived the conceptualization and the methodology, designed and performed the experiments and wrote the paper. M.A conceived the research and supervised and reviewed the manuscript. M.M performed the proofreading of the paper.

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Correspondence to Massimiliano Annoni.

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Perotti, F., Monno, M. & Annoni, M. Investigation of the influence of the AWJ-specific energy on the cutting kerf profile on aluminium 6082. Int J Adv Manuf Technol 130, 2799–2809 (2024). https://doi.org/10.1007/s00170-023-12841-9

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  • DOI: https://doi.org/10.1007/s00170-023-12841-9

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