Remarks to Abrasive Waterjet (AWJ) Forces Measurements

Štefek, Adam; Hlaváč, Libor M.; Tyč, Martin; Barták, Pavel; Kozelský, Jiří

doi:10.1007/978-3-030-53491-2_22

Cited by 6 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The sensor has been used for measuring many samples during several years. Some of the problems which may occur on some cutting devices were highlighted in the conference contribution [61]-detection of random strikes, DC voltage shifts or random electromagnetic pulses. The impact of the internal structure of steel materials on force measurements [62] and the relationship between the relative traverse speed and the cuttingto-deformation force ratio (CDFR) were also published [63].…”

Section: Introductionmentioning

confidence: 99%

Abrasive Waterjet (AWJ) Forces—Potential Indicators of Machining Quality

et al. 2021

Self Cite

View full text Add to dashboard Cite

The necessity of monitoring the abrasive waterjet (AWJ) processes increases with the spreading of this tool into the machining processes. The forces produced on the workpiece during the abrasive waterjet machining can yield some valuable information. Therefore, a special waterjet-force measuring device designed and produced in the past has been used for the presented research. It was tested during the AWJ cutting processes, because they are the most common and the best described up-to-date AWJ applications. Deep studies of both the cutting process and the respective force signals led to the decision that the most appropriate indication factor is the tangential-to-normal force ratio (TNR). Three theorems concerning the TNR were formulated and investigated. The first theorem states that the TNR strongly depends on the actual-to-limit traverse speed ratio. The second theorem claims that the TNR relates to the cutting-to-deformation wear ratio inside the kerf. The third theorem states that the TNR value changes when the cutting head and the respective jet axis are tilted so that a part of the jet velocity vector projects into the traverse speed direction. It is assumed that the cutting-to-deformation wear ratio increases in a certain range of tilting angles of the cutting head. This theorem is supported by measured data and can be utilized in practice for the development of a new method for the monitoring of the abrasive waterjet cutting operations. Comparing the tilted and the non-tilted jet, we detected the increase of the TNR average value from 1.28 ± 0.16 (determined for the declination angle 20° and the respective tilting angle 10°) up to 2.02 ± 0.25 (for the declination angle 30° and the respective tilting angle of 15°). This finding supports the previously predicted and published assumptions that the tilting of the cutting head enables an increase of the cutting wear mode inside the forming kerf, making the process more efficient.

show abstract

Section: Introductionmentioning

confidence: 99%

Abrasive Waterjet (AWJ) Forces—Potential Indicators of Machining Quality

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

“…Zones can be defined on the basis of various criteria, such as the depth of grooving, roughness, shape deviation, or other factors affecting the surface's quality. In this way, it is possible to identify areas with high roughness, undesirable shape deviations, or other problems and focus on their optimization and improvement [9,10].…”

Section: Introductionmentioning

confidence: 99%

The Influence of the Wavelength of Laser Light on the Non-Contact Measurement of the Roughness of Shiny Cut Surfaces on Stainless Steel A304 Material

Ružbarský

2024

Applied Sciences

View full text Add to dashboard Cite

The article is focused on the study of the effect of laser light with three wavelengths used in a laser profilometer for the measurement of selected roughness parameters of the shiny surface of stainless steel A304 material. The measured results were compared with the results we achieved with the reference contact roughness meter (SJ-400). The findings presented are relevant to the parameters of the experiment outlined within the article. In general, the obtained results make it possible to state that when measuring the roughness of shiny cut surfaces using non-contact laser profilometry, reflections of laser light occur. The relatively best results of measuring the parameters of the roughness of a shiny cut surface on the evaluated material (A304) were achieved by laser light with a wavelength of λ = 445 nm. In contrast, as the surface roughness of the cutting surface of the used material increased, the reflection of laser light decreased. Furthermore, we can state that the values of the roughness parameters Ra and Rz of the shiny surface measured by laser profilometry were several times higher than the values measured by the reference method. In contrast, the non-contact method of laser profilometry is not suitable for accurate measurements of the roughness parameters of shiny surfaces.

show abstract

“…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 ]. Some recent findings are presented here, e.g., the application of the sensor for testing of the assumption regarding linkage between the ratio of forces in x and z orthogonal axes and the ratio of cutting to deformation wear (i.e., respective tangential and normal forces).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Remarks to Abrasive Waterjet (AWJ) Forces Measurements

Cited by 6 publications

References 17 publications

Abrasive Waterjet (AWJ) Forces—Potential Indicators of Machining Quality

Abrasive Waterjet (AWJ) Forces—Potential Indicators of Machining Quality

The Influence of the Wavelength of Laser Light on the Non-Contact Measurement of the Roughness of Shiny Cut Surfaces on Stainless Steel A304 Material

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

Contact Info

Product

Resources

About