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

Abstract

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