20.500.12556/RUL-92950
Lasersko rezanje z ogljikovimi vlakni ojačenih polimerov pri izdelavi ultralahkih letal
Laser cutting of carbon fiber reinforced polymers for production of ultralight aircrafts
Lasersko rezanje lahko predstavlja pomembno rešitev pri rezanju polimerov, ki so ojačeni z ogljikovimi vlakni (CFRP kompoziti). Rezanje CFRP kompozitov je posebej pomembno pri izdelavi ultralahkih letal, kjer jih večinoma režejo z žago, kar je zelo zamudno. Zato smo v tem delu preizkusili različne načine laserskega rezanja CFRP kompozitov. Uporabili smo vlakenski laser z valovno dolžino 1060 nm in spremenljivo dolžino bliska. Eksperimente smo opravili pri dolžini bliskov 28 ns ter povprečni moči 20 W. Preizkusili smo štiri različne strategije rezanja: rezanje po enojni črti, ter tri načine rezanja z graviranjem. Pri rezanju z graviranjem smo žarek vodili po pravokotniku debeline 1 mm, in sicer: po vzporednih črtah (0° graviranje), po medsebojno pravokotnih črtah (0°/90° graviranje) in po črtah pod štirimi različnimi koti (0°/18°/45°/71° graviranje). Preizkuse smo izvedli na dveh CFRP ploščah debelin 1 mm in 2 mm. Ugotovili smo, da je najučinkovitejše rezanje z graviranjem, kjer žarek vodimo v različnih smereh (0°/90° ali 0°/18°/45°/71°). Pri tem izbira smeri nima pomembnega vpliva na učinkovitost in končni rezultat. Z izbranimi parametri smo iz 2 mm plošče uspešno izrezali krog in kvadrat. Rezultati kažejo, da uporabljen nanosekundni vlakenski laserski sistem omogoča fleksibilno lasersko rezanje CFRP kompozitov s podobno dobrim rezom kot ga dobimo pri konvencionalnem in zamudnem rezanju z žago.
Laser cutting represents an important solution for cutting carbon fiber reinforced polymers (CFRP). Cutting CFRP is particularly important in the production of ultralight aircrafts, where they are mostly cut with a saw, which is very time-consuming. Therefore, the main aim of this thesis is to test different approaches of laser cutting CFRP composites. We used a fiber laser with a wavelength of 1060 nm. Experiments were performed by using pulse duration of 28 ns and an average power of 20 W. Four different cutting strategies were tested: cutting on a single line and three ways of cutting by an engraving. In the case of cutting by an engraving the laser beam was guided within an 1-mm-thick rectangle: filled by parallel lines (0 ° engraving), filled by perpendicular lines (0°/90° engraving) and filled by lines under four different angles (0°/18°/45°/71° engraving). Tests were performed on two CFRP plates with thicknesses of 1 mm and 2 mm. We have found that the most efficient results are obtained by cutting by engraving, where the beam is guided in different directions (0°/90° or 0°/18°/45°/ 71°). Here, the choice of directions has negligible influence on the efficiency and final result. By using the selected laser parameters we successfully cut a circle and a square from the 2-mm-thick CFRP plate. The results proved that the used nanosecond fiber laser system enables flexible laser cutting of CFRP composites with very similar final result as the conventional and time-consuming cutting by a saw.
lasersko rezanje
laserska obdelava materialov
vlakenski laser
polimeri z ogljikovimi vlakni
ultralahka letala
tehnike in parametri rezanja
laser cutting
laser material processing
fiber laser
carbon fiber reinforced polymers
ultralight aircrafts
cutting techniques and parameters
true
false
false
Slovenski jezik
Angleški jezik
Diplomsko delo/naloga
2017-07-11 09:22:10
2017-07-11 09:22:11
2022-08-10 01:22:24
0000-00-00 00:00:00
2017
0
0
0000-00-00
NiDoloceno
NiDoloceno
NiDoloceno
0000-00-00
0000-00-00
0000-00-00
1970-01-01
189589
494.pdf
494.pdf
1
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772207b5-a1b3-11eb-a523-00155dcfd717
20.500.12556/rul/0bbeee8f-d0e4-43e0-9987-00864d2369e5
https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=101116
Fakulteta za strojništvo
0
0
0