Analysis of acoustic emission recorded during monitoring of abrasive waterjet cutting of stainless steel AISI 309

Tekst se bavi pratećim fizikalnim pojavama koje nastaju u procesu rezanja metalnih materijala tehnologijom abrazivnog vodenog mlaza (AWJ). Tekst opisuje uzroke nastalih vibracija i akustične emisije, tijekom vibracija i akustične emisije analizom njihova frekvencijskog spektra. Podaci su prikupljeni dodirnim senzorima u kontroliranom eksperimentu, u kojemu je korištena AWJ tehnologija za rezanje legiranog čelika. Tijekom eksperimenata, neki ulazni čimbenici su se mijenjali, a izmjereni parametri su bili podvrgnuti različitim vrstama analize pomoću specijaliziranog softvera LabVIEW. Dobiveni podaci pružaju informacije o vibracijama i spektru akustične emisije i omogućuju nam pronaći ovisnost između topografije površine rezanih materijala i spektra emisije popratnih fizikalnih pojava koje se javljaju tijekom AWJ procesa.The paper deals with the accompanying physical phenomena that arise in the process of cutting metal materials by abrasive water jet (AWJ) technology. The text describes the causes of arising vibration and acoustic emission, course of vibration and acoustic emission by analysing their frequency spectrum. Data were collected by touch sensors within controlled experiment, in which the AWJ technology for cutting alloy steel was used. During the experiments, some input factors were changed and measured parameters were subjected to different types of analysis using specialized software LabVIEW. Obtained data provide information about vibration and acoustic emission spectrum and enable us to find a dependency between the surface topography of cut materials and the emission spectrum of the accompanying physical phenomena arising during the AWJ process

Analysis of acoustic emission recorded during monitoring of abrasive waterjet cutting of stainless steel AISI 309

Tekst se bavi pratećim fizikalnim pojavama koje nastaju u procesu rezanja metalnih materijala tehnologijom abrazivnog vodenog mlaza (AWJ). Tekst opisuje uzroke nastalih vibracija i akustične emisije, tijekom vibracija i akustične emisije analizom njihova frekvencijskog spektra. Podaci su prikupljeni dodirnim senzorima u kontroliranom eksperimentu, u kojemu je korištena AWJ tehnologija za rezanje legiranog čelika. Tijekom eksperimenata, neki ulazni čimbenici su se mijenjali, a izmjereni parametri su bili podvrgnuti različitim vrstama analize pomoću specijaliziranog softvera LabVIEW. Dobiveni podaci pružaju informacije o vibracijama i spektru akustične emisije i omogućuju nam pronaći ovisnost između topografije površine rezanih materijala i spektra emisije popratnih fizikalnih pojava koje se javljaju tijekom AWJ procesa.The paper deals with the accompanying physical phenomena that arise in the process of cutting metal materials by abrasive water jet (AWJ) technology. The text describes the causes of arising vibration and acoustic emission, course of vibration and acoustic emission by analysing their frequency spectrum. Data were collected by touch sensors within controlled experiment, in which the AWJ technology for cutting alloy steel was used. During the experiments, some input factors were changed and measured parameters were subjected to different types of analysis using specialized software LabVIEW. Obtained data provide information about vibration and acoustic emission spectrum and enable us to find a dependency between the surface topography of cut materials and the emission spectrum of the accompanying physical phenomena arising during the AWJ process

Vibration emission as a potential source of information for abrasive waterjet quality process control

The paper deals with basic research of vibration generated at abrasive waterjet cutting of materials and their analysis of frequency spectrum in the plane cut. As an experimental material, stainless steel AISI 309 has been used. Experimentally controlled factor involved in the experiment was abrasive mass flow rate with values m a  = 250 and 400 g min−1 at a constant traverse speed v = 100 mm min−1. The vibrations were recorded during experimental cutting by sensors PCB IMI type 607A11 placed on experimental material along the cut at a distance of 50 mm from the cutting plane. Data collection was carried by NI PXI measurement system and frequency analyzer Microlog GX-S. Signal was evaluated by virtual instrument created in the object-programming environment LabView 8.5. Various sizes of amplitudes were observed depending on the distance of abrasive waterjet cutting process from the beginning of the cut. Two peaks of frequency bands have been also found: the first between 500 and 600 Hz and the other at approximately 12.5 kHz. Using this method is possible to ensure the determination of technology efficiency of the material removal process.Web of Science61-429428

Measurement of Thermal Emission During Cutting of Materials Using Abrasive Water Jet

This article deals with measurement of the thermal gradient on material during abrasive water jet cutting. The temperature was measured by thermo camera before the technological process started, during the AWJ cutting process technology, and just after the cutting process. We performed measurements on several types of materials. We calculated the approximate amount of energy during the AWJ cutting process technology that changes into thermo energy, which is the current water pressure drained in a catcher tank