Investigation of the abrasive water jet trajectory curvature inside the kerf

Hlaváč, Libor M.

doi:10.1016/j.jmatprotec.2008.10.009

Cited by 88 publications

(60 citation statements)

References 7 publications

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“…The declination angle of striations measured at the bottom edge of a sample wall for a certain traverse speed introduced by Hlaváč [ 25 ] can be used for the calculation of the limit value according the equation

where the traverse speed

is the experimental one for which the declination angle

is measured on the kerf wall [ 25 ]. The declination angle or respective relative traverse speed (the ratio of

and

) can be utilized for determination of some quantities and process parameters regarding required quality of cutting, i.e., declination angle of striations on the kerf walls [ 23 ] and inclination of the walls (the taper) [ 26 ].…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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Influence of Material Structure on Forces Measured during Abrasive Waterjet (AWJ) Machining

et al. 2020

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Material structure is one of the important factors influencing abrasive waterjet (AWJ) machining efficiency and quality. The force measurements were performed on samples prepared from two very similar steels with different thicknesses and heat treatment. The samples were austenitized at 850 °C, quenched in polymer and tempered at various temperatures between 20 °C and 640 °C. The resulting states of material substantially differed in strength and hardness. Therefore, samples prepared from these material states are ideal for testing of material response to AWJ. The force measurements were chosen to test the possible influence of material structure on the material response to the AWJ impact. The results show that differences in material structure and respective material properties influence the limit traverse speed. The cutting to deformation force ratio seems to be a function of relative traverse speed independently on material structure.

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where the traverse speed

is the experimental one for which the declination angle

is measured on the kerf wall [ 25 ]. The declination angle or respective relative traverse speed (the ratio of

and

Section: Theoretical Backgroundmentioning

confidence: 99%

“…The theoretical model presented in [ 23 , 24 , 25 , 26 ] makes it possible to limit the transfer values determined for one machining configuration to another, reducing the necessary experimental work. Equation (4) is based on functional dependences of traverse speed on respective changing variables-Equations (1) and (2).…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Influence of Material Structure on Forces Measured during Abrasive Waterjet (AWJ) Machining

et al. 2020

Self Cite

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“…Softer materials like rubber and foam are cut by pure water jet, abrasive water jets cut harder materials like steel, titanium, hard rock, common or bullet-proof glass, ceramics and even such materials as corundum or carbides. The continuous improvement of the technology includes deeper study of relationships between material properties and cutting quality [5,6] aimed at better understanding of the cutting process as well as prediction and analyses of its results. The basis for theoretical description of the interaction between the jet and material was derived in the or water, solid particles and air), are produced either as slurry jets or injection jets.…”

Section: High-energy Liquid Jet Benefits and Hazardsmentioning

confidence: 99%

High-energy liquid jet technology — risk assessment in practice

Hlaváčová

Mulicka

2012

International Journal of Occupational Medicine and Environmental Health

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Objectives:The contribution deals with a risk assessment in practical applications of the high-energy liquid jet technology from the point of view of the risk identification, estimation and evaluation. Materials and Methods: Differences between three different types of workplaces are highlighted and analysed -the indoor, the outdoor and the research ones. Theoretical analyses are supported by particular application of the method for the risk assessment in the Laboratory of Liquid Jets at the VŠB -Technical University of Ostrava. This laboratory is primarily oriented to research. Nevertheless, the conclusions can be used also for predominantly commercial workplaces. Results: Some new considerations and evaluations concerning health and safety are presented. Conclusions: Failure Mode and Effect Analysis (FMEA) procedures were applied and their limitations in risk assessment of water jet-based technologies are explained.

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“…These two quantities can be measured by contact profilometers or by non-contact profilometers [14][15][16]. Nevertheless, the values depend not only on cut material or depth in the kerf but also on abrasive material quality and grain size [17]. Former research works aimed at the problem of abrasive material changes in the mixing process show, however, that the problem is not easy to solve [18,19] because not only the average mean size a o plays the decisive role in changes to new one a n but also the amount and type of the original damage of abrasive grains.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Water Jet Cutting of Hardox Steels—Quality Investigation

Krenický

Servátka²,

Gašpár

et al. 2020

Processes

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The paper aims to study the surface quality dependency on selected parameters of cuts made in Hardox™ by abrasive water jet (AWJ). The regression process was applied on measured data and the equations were prepared for both the Ra and Rz roughness parameters. One set of regression equations was prepared for the relationship of Ra and Rz on cutting parameters—pumping pressure, traverse speed, and abrasive mass flow rate. The second set of regression equations describes relationships between the declination angle in kerf as the independent variable and either the Ra or the Rz parameters as dependent variables. The models can be used to predict cutting variables to predict the surface quality parameters.

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Investigation of the abrasive water jet trajectory curvature inside the kerf

Cited by 88 publications

References 7 publications

Influence of Material Structure on Forces Measured during Abrasive Waterjet (AWJ) Machining

Influence of Material Structure on Forces Measured during Abrasive Waterjet (AWJ) Machining

High-energy liquid jet technology — risk assessment in practice

Abrasive Water Jet Cutting of Hardox Steels—Quality Investigation

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