20.500.12556/RUL-160455 Ultrazvočno varjenje zaščitne membrane Ultrasonic welding of protective membrane Hladilna črpalka se med delovanjem segreva, s tem pa se lahko pojavi nevarnost kondenzacije. Pojav vlage lahko kvarno vpliva na življenjsko dobo elektronskega vezja in posledično celotne črpalke. To preprečujemo z ultrazvočnim varjenjem ePTFE membrane na električni konektor. V prvem delu eksperimentalnega sklopa smo varili s sonotrodo z ravnim dnom pri različnih metodah krmiljenja zaključka varjenja. V drugem delu smo na osnovi dognanj skonstruirali novo sonotrodo z usmerjevalnikom energije. Kakovost spojev smo vrednotili glede na njihovo vizualno kakovost ter tlak puščanja. Opravili smo tudi meritve višine zvarnega roba. Ugotovili smo, da je z vidika ponovljivosti in porabe materiala najboljša sonotroda z usmerjevalnikom energije v kombinaciji z ravnim zvarnim robom. Ultrazvočno varjenje s sonotrodo z ravnim dnom in usmerjevalnikom energije na zvarnem mestu pa porabi 50 J oziroma kar 11x manj energije kot sonotroda z usmerjevalnikom energije, kar ga naredi bolj trajnostnega. The cooling pump heats up during operation, which can lead to condensation. The occurrence of moisture can have a detrimental effect on the lifetime of the electronic circuitry and consequently of the whole pump. This is prevented by ultrasonically welding the ePTFE membrane to the electrical connector. In the first part of the experimental set-up, a flat bottom horn was welded with different controlling methods. In the second part, a new horn with an energy director was constructed based on the findings. The quality of the weld joints was evaluated in terms of their visual quality and leakage pressure. Weld edge height measurements were also carried out. We found that the horn with an energy director in combination with flat weld edge is the best in terms of repeatability and material consumption. Ultrasonic welding with a flat bottomed horn and an energy director on the weld spot is more sustainable since it uses 50 J or 11x less energy than a horn with an energy director, making it more sustainable. ultrazvočno varjenje polimerov zaščitna membrana električni konektor sonotroda krmiljenje procesa test puščanja ultrasonic welding of polymers protective membrane electronic connector horn process control leakage test true false false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2024-08-29 07:30:04 2024-08-29 07:30:10 2024-12-11 11:33:32 0000-00-00 00:00:00 2024 0 0 XX, 56 str. 2024 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 621.791.1:678.7:621.315.682(043.2) 263693 218572803 34889.pdf 34889.pdf 1 81F2F48369255EEA112722527DE4962B 3ab9a13c3b57da4b564944a598df9808e1a4011870a05422f336f1bd59b6813e 87ba399a-65c7-11ef-8f74-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=189152 Fakulteta za strojništvo 0 0 0