Ceramic sponge Abrasive Waterjet (AWJ) precision cutting through a temporary filling procedure

Viganò, Francesco; Cristiani, Cinzia; Annoni, Massimiliano

doi:10.1016/j.jmapro.2017.05.014

Cited by 13 publications

(7 citation statements)

References 25 publications

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“…Pressure fluctuations are related to the pressure intensifier architecture, but also to the characteristics of the other components of the pumping system. A model able to simulate the pump behaviour and implemented with the Modelica language [ 17 ] was reported in [ 10 ] ( Figure 3 ). The model was validated via an experimental campaign and is a powerful tool for pump designers and researchers.…”

Section: Process Modellingmentioning

confidence: 99%

“…Ceramic sponge machining after firing is a great issue, requiring special tools and procedures because of the material peculiar macrostructure and its intrinsic brittleness [ 191 ]. The study reported in [ 192 ] approached the problem by exploiting the AWJ process and showing its potential as a flexible tool coming up as an alternative to other ceramic manufacturing processes such as grinding, ultrasonic machining and laser machining [ 185 ]. The influence of a temporary pore filling agent, infiltrated in the already sintered sponge, was evaluated and its effect on the jet coherence was investigated through both modelling and experimental approaches.…”

Section: Applicationsmentioning

confidence: 99%

“…Defects are measured, using both conventional and CMM, grazing light surface inspection and digital image analysi chemical actions are applied by the AWJ cutting process and the neglig on the struts preserve their integrity. A case study geometry was machi tolerances of 0.1 mm on a Ø 10 mm ceramic sponge cylinder over a 1 complex-shaped component was cut from a 35-mm-thick sponge (Figu [192].…”

Section: Nonconventional Waterjet Cutting Applicationsmentioning

confidence: 99%

See 2 more Smart Citations

A Review of Waterjet Cutting Research towards microAWJ and the Definition of the Waterjet Digital Twin

Annoni

2024

Materials

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This review paper aimed to draw the red line passing through almost 25 years of research on waterjet cutting carried out at WJ_Lab, the waterjet laboratory of the Department of Mechanical Engineering of Politecnico di Milano. The purpose was not to just historically analyse the obtained scientific results by themselves but to make them even more useful by introducing the concept of the waterjet digital twin passing through the accuracy improvements due to microAWJ. This strategy effectively creates synergy among the topics and gives the opportunity to researchers in this field to both have an example of how research in industrial manufacturing processes can be guided by scientific and industrial needs, at least from the author’s point of view, and to appreciate how it can be made useful for further improvements by introducing a powerful concept as the digital twin.

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Section: Process Modellingmentioning

confidence: 99%

Section: Applicationsmentioning

confidence: 99%

Section: Nonconventional Waterjet Cutting Applicationsmentioning

confidence: 99%

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A Review of Waterjet Cutting Research towards microAWJ and the Definition of the Waterjet Digital Twin

Annoni

2024

Materials

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“…Compared with 0-3, 1-3 and, 2-3 piezoelectric composites, 3-3 ceramic/polymer composites have a bi-continuous architecture comprising an active ferroelectric ceramic phase and a passive flexible polymer phase, which possess high hydrostatic pressure sensitivity and good coupling properties with water, thereby improving the bandwidth and transmitting and receiving sensitivity of the transducer (Newnham et al, 1978;Tressler et al, 1999;Bowen and Topolov, 2003). But traditional fabricating methods, such as the self-assembly method (Liu et al, 1996), the gel-casting method, the cutting-filling method (Viganò et al, 2017) and so on, have certain disadvantages like low material utilization, long production cycles and limited product complexity (Woodward et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

4D Printing of Lead Zirconate Titanate Piezoelectric Composites Transducer Based on Direct Ink Writing

Zhang

Zhou

et al. 2021

Front. Mater.

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Lead zirconate titanate (PZT) piezoelectric composites used in transducers were fabricated via direct ink writing (DIW) combined with furnace sintering and resin impregnation. A ceramic slurry with a volume fraction of 52 vol% and suitable viscoelasticity was prepared. After post-process, the PZT ceramic specimens showed a nanoscale grain size with a density of 7.63 g/cm3, accounting for 97.8% of the theoretical density. The effects of different printing rod spacing on the electrical properties of composites were evaluated and lucubrated. Finally, an underwater acoustic transducer was assembled by using the PZT piezoelectric composites fabricated by the above method. The electrical signal generated by the underwater acoustic transducer changed autonomously with the acoustic stimulation, which indicated the application mode of 4D printing in functional devices in the future.

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“…The energy loss not only affects the jetting efficiency, but also harms the operator and system stability, for the lost energy exists as heat and sound energy. Therefore, an important aspect of optimizing nozzle structure and jetting efficiency is to disclose the relationship between energy loss and nozzle parameters [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Measurement of Flow Field in Waterjet Nozzles with Different Structures

Hua¹,

Zhang²,

Li³

et al. 2019

I2M

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This paper attempts to measure the jet flow field of different nozzles accurately, and optimize the effect of the jetting devices. For this purpose, four nozzles with different structures were physically and mathematically modelled, including conical-cylindrical nozzle, conical nozzle, cylindrical nozzle and streamlined nozzle. The turbulence was described by the improved standard k-epsilon (k-ε) turbulence model. Then, the measurement space was meshed into unstructured triangular grids, with high grid density in key areas. Next, the flow field inside and outside each nozzle was simulated on ANSYS Fluent, and the jet velocity field distribution at different positions, velocity fields and kinetic turbulence were analyzed based on the simulation results. The analysis shows that the streamlined nozzle achieved the highest flow velocity and lowest turbulent energy at the centerline of the flow field, and should be prioritized in actual applications. The conical-cylindrical nozzle strikes a good balance between efficiency and cost, providing a good option for jetting operations. By contrast, conical nozzle and cylindrical nozzle should not be adopted. The cylindrical segment can stabilize the shape of the jet by increasing the jet acceleration and peak velocity. The nozzle structure should be optimized to reduce the energy loss in each phase of energy conversion, thereby lowering the energy required to destroy a unit volume of the target. The simulation results shed important new light on the selection of nozzle for jetting devices.

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Ceramic sponge Abrasive Waterjet (AWJ) precision cutting through a temporary filling procedure

Cited by 13 publications

References 25 publications

A Review of Waterjet Cutting Research towards microAWJ and the Definition of the Waterjet Digital Twin

A Review of Waterjet Cutting Research towards microAWJ and the Definition of the Waterjet Digital Twin

4D Printing of Lead Zirconate Titanate Piezoelectric Composites Transducer Based on Direct Ink Writing

Measurement of Flow Field in Waterjet Nozzles with Different Structures

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