Primerjava mehanskih lastnosti ultrazvočno zvarnih spojev iz polimera PSU GF30

Oražem, Gregor (author), Klobčar, Damjan (mentor)

Dandanes je uporaba polimernih materialov zelo priljubljena, pri njihovi uporabi pa se pogosto srečujemo z različnimi tehnikami spajanja. Ena izmed zelo razširjenih oblik spajanja polimernih materialov je ultrazvočno varjenje, ki je zelo razširjeno na vseh področjih, kjer se uporabljajo polimeri, kot na primer pri izdelavi igrač, raznih ohišij strojnih delov, pakiranju v prehranski industriji itd. V zaključni nalogi smo se osredotočili na analizo termoplastičnega polimera PSU GF30. V prvem delu eksperimentalnega sklopa smo analizirali mehanske lastnosti osnovnega materiala, izrezanega iz plošče v smeri ekstrudiranja in prečno na smer ekstruzije. V drugem delu smo varili plošče v prekrivnem spoju z ultrazvočnim varjenjem. Pri tem smo spreminjali tehnološke parametre, kot sta globina uvaritve in velikost prekritja plošč. Ugotovili smo, da imajo vzorci, izdelani vzporedno na smer ekstruzije, 50 % višjo strižno trdnost kot vzorci, razrezani pravokotno na smer ekstruzije. Najboljše trdnostne lastnosti smo dosegli pri najmanjšem prekrivanju in najmanjši globini posedanja, pri čemer je bila porabljena manjša količina energije.

• Language: Slovenian
• Keywords: ultrazvočno varjenje, varilni parametri, porušna trdnost, polimeri, zvari
• Work type: Final paper
• Typology: 2.11 - Undergraduate Thesis
• Organization: FS - Faculty of Mechanical Engineering
• Place of publishing: Ljubljana
• Publisher: [G. Oražem]
• Year: 2023
• Number of pages: XV, 41 str.
• PID: 20.500.12556/RUL-149004
• UDC: 621.791.053:539.389.1(043.2)
• COBISS.SI-ID: 164959491
• Publication date in RUL: 02.09.2023

ORAŽEM, Gregor, 2023, Primerjava mehanskih lastnosti ultrazvočno zvarnih spojev iz polimera PSU GF30 [online]. Bachelor’s thesis. Ljubljana : G. Oražem. [Accessed 18 April 2025]. Retrieved from: https://repozitorij.uni-lj.si/IzpisGradiva.php?lang=eng&id=149004

Secondary language

• Language: English
• Title: Comparison of mechanical properties of ultrasonic welded joints made of PSU GF30

Abstract

Nowadays, the use of polymer materials is very popular, and as a result, we frequently come across different techniques for joining them together. One of the widely used methods for joining polymer materials is ultrasonic welding, which is prevalent in all fields where polymers are utilized, such as toy manufacturing, production of various machinery casings, packaging in the food industry, etc. In this final project, we focused on analyzing the thermoplastic polymer PSU GF30. In the first part of the experimental setup, we analyzed the mechanical properties of the base material, cut from a plate in the direction of extrusion and perpendicular to the extrusion direction. In the second part, we welded the plates in an overlapping joint using ultrasonic welding. During this process, we varied technological parameters such as penetration depth and plate overlap size. We found that samples produced parallel to the extrusion direction had 50% higher shear strength compared to samples cut perpendicular to the extrusion direction. The best strength properties were achieved with the smallest overlap and shallowest penetration depth, while consuming a smaller amount of energy.

• Keywords: ultrasonic welding, welding parameters, tensile strenght, polymers, welds