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

Hlaváč, Libor M.; Štefek, Adam; Tyč, Martin; Krajcarz, Daniel

doi:10.3390/ma13173878

Cited by 10 publications

(13 citation statements)

References 24 publications

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“…It is a result of forced convection (as a large amount of energy is required to remove the material particles), the friction of the abrasive water jet with the workpiece surface, and heat dissipation. The material structure features indicate local changes in temperature taking place in the jet impact zone and the impact affected zone [ 22 ].…”

Section: Introductionmentioning

confidence: 99%

Influence of Local Temperature Changes on the Material Microstructure in Abrasive Water Jet Machining (AWJM)

et al. 2021

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This article considers effects of local heat transfer taking place insteel cutting by abrasive water jet machining (AWJM). The influence of temperature changes during AWJM has not been investigated thoroughly. Most studies on AWJM suggest that thermal energy has little or no effect on the material cut. This study focused on the analysis of the material microstructure and indentation microhardness in the jet impact zone and the adjacent area. The structure features revealed through optical metallography and scanning microscopy suggest local temperature changes caused by the impact of the abrasive water jet against the workpiece surface. From the microscopic examinationand hardness tests, it is clear that, during the process, large amounts of energy were transferred locally. The mechanical stress produced by the water jet led to plastic deformation at and near the surface. This was accompanied by the generation and transfer of large amounts of heat resulting in a local rise in temperature to 450 °C or higher.

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Section: Introductionmentioning

confidence: 99%

Influence of Local Temperature Changes on the Material Microstructure in Abrasive Water Jet Machining (AWJM)

et al. 2021

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“…Since that time, it has been used for the investigation of the impact of the AWJ on materials. The first remarks about force measurements performed with our sensor were presented at a conference in 2019 [ 32 ]. Research of the AWJ force’s dependence on the material structure was presented soon after [ 33 ].…”

Section: Introductionmentioning

confidence: 99%

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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“…Modal analysis along with monitoring of process data are aimed at studying the frequencies in which the vibration amplitude is significantly increased for certain induced frequencies, even when the periodic excitation forces are small [ 16 , 17 ]. In addition, since these and other processes affect the machining results, the impact of the changed conditions on the machining process needs to be further investigated in order to improve.…”

Section: Introductionmentioning

confidence: 99%

“…The frequency ranges analyzed in the studies depend on the process parameters [ 24 ]. An important multi-parametric description of the cutting process has been presented by the Ostrava group [ 16 , 17 , 18 , 19 , 25 ]. The group of TU Kosice researchers is involved in systematic studies of the operational states of manufacturing processes using progressive technologies and the influence of the process parameters on the operation and quality of the machining [ 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Water Jet Technology: Experimental Verification of the Input Factors Variation Influence on the Generated Vibration Levels and Frequency Spectra

Olejárová

Krenický

2021

Materials

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Vibration measurement belongs amongst the most important activities for the correct and stable operation of machines in terms of quality, economy, and safety. Monitoring the condition of the machine provides the key data for the detection of machine parts damage, thus preventing unexpected failure states and production drop-outs. Therefore, special attention is paid in the paper to the measurement and evaluation of basic parameters of vibration, particularly the frequency of vibrations and the amplitude of vibration acceleration. Experimental measurements were performed while machining the material HARDOX 500/10 on a production system using the abrasive water jet technology (AWJ) with the varied abrasive mass flow and the feed rate. By evaluating the results of measurements, recommendations of suitable and inappropriate combinations of operating parameters were formulated, widening current knowledge in the field of the abrasive parameters and the speed of movement of the technological head influence the amplitudes of vibration acceleration in the operation of production systems with AWJ technology.

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

Cited by 10 publications

References 24 publications

Influence of Local Temperature Changes on the Material Microstructure in Abrasive Water Jet Machining (AWJM)

Influence of Local Temperature Changes on the Material Microstructure in Abrasive Water Jet Machining (AWJM)

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

Water Jet Technology: Experimental Verification of the Input Factors Variation Influence on the Generated Vibration Levels and Frequency Spectra

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