Karakterizacija obrabe orodja v frekvenčnem spektru pospeškov

Knez, Domen (author), Pušavec, Franci (mentor)

Karakterizacija obrabe odrezovalnih orodij in njihove obstojnosti je zahteven proces, ki ima neposreden vpliv na kakovost obdelave in je ob velikih izdelovalnih serijah pomemben iz ekonomskega vidika. Sodobne orodjarne si želijo preko merljivih in ponovljivih preizkusov ovrednotiti, kdaj postane obdelava zaradi obrabe orodja nezadostna. V sklopu naloge smo predstavili, kako ustrezno in natančno okarakterizirati obstojnost stružnega noža preko analize frekvenčnega spektra pospeškov. Z različnimi orodji za analizo spektra smo uspeli dvigniti izkoriščenost obstojnosti odrezovalnega orodja in predstavili način preizkušanja, ki je ponovljiv in aplikativen neodvisno od stružnih parametrov.

• Language: Slovenian
• Keywords: načrt eksperimentov, kakovost površine, frekvenčni spekter, obraba orodja, diskretna Fourierjeva transformacija, analiza s kurtozo
• Work type: Master's thesis/paper
• Typology: 2.09 - Master's Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [D. Knez]
• Year: 2023
• Number of pages: XXII, 107 str.
• PID: 20.500.12556/RUL-152434
• UDC: 539.375.6:621.941.025:517.443(043.2)
• COBISS.SI-ID: 183168515
• Publication date in RUL: 24.11.2023

Secondary language

• Language: English
• Title: Tool Wear Characterization inside Frequency Spectrum of Accelerations

Abstract

Characterisation of cutting tool wear and life is a demanding process, which has a direct influence on the quality of manufacturing process and is of big importance in case of large manufacturing series. Modern (CNC) machine shops seek to determine when the manufacturing process is inefficient due to tool wear based on measurable and repeatable tests. Throughout the master thesis we presented a way to accurately determine the tool life of a lathe tool bit using the frequency spectrum analysis of accelerations. Using different tools of spectrum analysis, we successfully extended the use of available tool life and presented a test, which is repeatable and applicative independent of turning parameters.

• Keywords: design of experiments, surface finish, frequency spectrum, tool wear, discrete Fourier transform, kurtosis analysis