Shape distortion reduction method for abrasive water jet (AWJ) cutting

Hlaváč, Libor M.; Hlaváčová, Irena M.; Arleo, Francesco; Viganò, Francesco; Annoni, Massimiliano; Geryk, Vladan

doi:10.1016/j.precisioneng.2018.04.003

Cited by 27 publications

(26 citation statements)

References 29 publications

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“…Beside the basic metal set also used in past experiments [ 37 ], two additional sets of samples were prepared of 34CrMo4 steel (DIN norm), each one with a different nickel ratio. These samples were austenitized at 850 °C, quenched in polymer and tempered at various temperatures; their tempering and respective uniaxial strengths are presented in Table 3 .…”

Section: Experimental Setup Presumptions and Resultsmentioning

confidence: 99%

“…Therefore, the most typical task of the AWJ operator is to set up an appropriate traverse speed, ensuring the desired quality of a product. An example of complex knowledge application, based on the theoretical description of an AWJ cutting through the declination angle and the taper, was demonstrated in [ 37 ], comparing results of the theoretical model and experimental investigation on columns cut from various metal samples. The simplified Hlaváč’s model for limit traverse speed calculation can be expressed as Equation (1):

…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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Abrasive Waterjet (AWJ) Forces—Indicator of Cutting System Malfunction

et al. 2021

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Measurements enabling the online monitoring of the abrasive waterjet (AWJ) cutting process are still under development. This paper presents an experimental method which can be applicable for the evaluation of the AWJ cutting quality through the measurement of forces during the cutting process. The force measuring device developed and patented by our team has been used for measurement on several metal materials. The results show the dependence of the cutting to deformation force ratio on the relative traverse speed. Thus, the force data may help with a better understanding the interaction between the abrasive jet and the material, simultaneously impacting the improvement of both the theoretical and empirical models. The advanced models could substantially improve the selection of suitable parameters for AWJ cutting, milling or turning with the desired quality of product at the end of the process. Nevertheless, it is also presented that force measurements may detect some undesired effects, e.g., not fully penetrated material and/or some product distortions. In the case of a proper designing of the measuring device, the force measurement can be applied in the online monitoring of the cutting process and its continuous control.

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Section: Experimental Setup Presumptions and Resultsmentioning

confidence: 99%

…”

Section: Theoretical Backgroundmentioning

confidence: 99%

Abrasive Waterjet (AWJ) Forces—Indicator of Cutting System Malfunction

et al. 2021

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“…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 ]. Because the traverse speed of the cutting head is the most easily controlled parameter of AWJ machining, it is very important to know the relationship between this speed and resulting quality, as it was presented by Hlaváč et al [ 27 ]. However, the limit declination angle used for the calculation of the limit traverse speed depends on the jet energy and material parameters.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…Equation (4) is based on functional dependences of traverse speed on respective changing variables-Equations (1) and (2). Therefore, the values ones determined for certain machine configuration like, e.g., in [ 27 ], need not be determined again making new samples and measuring respective angles on them. Provided that the nozzle diameter, pressure and abrasive type are changed, the limit traverse speed for configuration 2 is calculated from the value for configuration 1 through the equation

where

is the limit traverse speed calculated for machine configuration 2;

is the limit traverse speed already known for machine configuration 1;

is a ratio of abrasive qualities (the second to the first one), if they differ;

are the respective nozzle diameters of configurations;

are the respective pumping pressures of configurations.…”

Section: Theoretical Backgroundmentioning

confidence: 99%

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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“…The microscopic models describing the mechanism of material cutting were prepared [18] as well as the macroscopic model of cutting front behavior [19,20]. An interesting multi-parametric phenomenological description of the cutting process has also been presented by the Ostrava group [21][22][23]. The group of TU Kosice researchers entered this research area as a part of systematic studies of the operational states of manufacturing processes using progressive technologies [14,15,24] and influence of the process parameters on the surface quality [25,26] a few years ago.…”

Section: Introductionmentioning

confidence: 99%

Abrasive Water Jet Cutting of Hardox Steels—Quality Investigation

Krenický

Servátka²,

Gašpár

et al. 2020

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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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Shape distortion reduction method for abrasive water jet (AWJ) cutting

Cited by 27 publications

References 29 publications

Abrasive Waterjet (AWJ) Forces—Indicator of Cutting System Malfunction

Abrasive Waterjet (AWJ) Forces—Indicator of Cutting System Malfunction

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

Abrasive Water Jet Cutting of Hardox Steels—Quality Investigation

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