Karakterizacija interakcij med krtačo in obdelovancem s spremljanjem sil in pospeškov pri postopku raziglevanja

Piasecka, Aleksandra (author), Pušavec, Franci (mentor)

Raziglevanje z abrazivnimi ščetkami je v glavnem določeno s kontaktno silo med ščetko in obdelovancem. Za doseganje optimalnih rezultatov obdelave mora kontaktna sila ostati konstantna. Vendar nanjo vplivata obraba ščetke in spreminjanje procesnih parametrov. V tej raziskavi so bile interakcije med ščetko in obdelovancem karakterizirane s spremljanjem sile in pospeškov. Senzorji sile Nanosen PNC so merili kontaktno silo pri različnih stanjih ščetke in globinah vstavitve, medtem ko je pospeškomer PCB 603C91 spremljal vibracije pri različnih vrtilnih hitrostih, globinah vstavitve in stanjih ščetke. Kontaktna sila se je z večanjem globine vstavitve nelinearno povečevala, pri čemer je najbolj obrabljena ščetka izkazovala večje sile kot srednje obrabljena ščetka. Metoda kompenzacije obrabe je bila validirana z vzpostavitvijo kontaktne sile obrabljene ščetke na ravni sile nove ščetke. Spearmanova korelacija je pokazala pozitivno korelacijo med globino vstavitve in SD RMS (ρ = 0,73, p < 0,001) ter negativno korelacijo med vrtilno hitrostjo in amplitudo FFT (ρ = −0,58, p < 0,05) v frekvenčnem pasu 5–10 kHz, kar kaže na potencial spremljanja teh značilk za prilagajanje globine vstavitve in vrtilne hitrosti. Vendar značilke vibracij niso zanesljivo razlikovale med kakovostjo površine in stanjem ščetke.

• Language: Slovenian
• Keywords: raziglevanje, interakcije med ščetko in obdelovancem, spremljanje na osnovi, meritev pospeškov, obdelava signalov, merjenje kontaktne sile
• Work type: Master's thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2026
• PID: 20.500.12556/RUL-188815
• Publication date in RUL: 29.09.2026

Secondary language

• Language: English
• Title: Characterisation of Brush–Workpiece interactions through forces and accelerations monitoring in Deburring process

Abstract

Deburring with abrasive brushes is mainly governed by the contact force between the brush and workpiece. For optimal machining results, the contact force should be kept constant. However, it is affected by brush wear and variations in process parameters. This study characterised brush-workpiece interactions through force and acceleration monitoring. Nanosen PNC force sensors measured contact force across different brush conditions and insertion depths, while a PCB 603C91 accelerometer monitored vibrations across varied rotational speeds, insertion depths, and brush conditions. Contact force increased non-linearly with insertion depth, with the most worn brush showing higher forces than the intermediate worn brush. A wear compensation method was validated by restoring the contact force of a worn brush to the level of a new brush. Spearman correlation showed that insertion depth positively correlated with SD_RMS (ρ = 0.73, p < 0.001) and rotational speed negatively with FFT amplitude (ρ = −0.58, p < 0.05), both in the 5–10 kHz band, indicating the potential of monitoring these features for insertion depth and speed adjustment. However, vibration features did not reliably distinguish visual quality or brush condition.

• Keywords: deburring, brush-workpiece interactions, accelerometer-based monitoring, signal processing, contact force measurement