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Lasersko rezanje z ogljikovimi vlakni ojačenih polimerov pri izdelavi ultralahkih letal
Zuzek, Štefan (Author), Gregorčič, Peter (Mentor) More about this mentor... This link opens in a new window

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Abstract
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.

Language:Slovenian
Keywords:lasersko rezanje laserska obdelava materialov vlakenski laser polimeri z ogljikovimi vlakni ultralahka letala tehnike in parametri rezanja
Work type:Bachelor thesis/paper (mb11)
Organization:FS - Faculty of Mechanical Engineering
Year:2017
Views:397
Downloads:298
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Secondary language

Language:English
Title:Laser cutting of carbon fiber reinforced polymers for production of ultralight aircrafts
Abstract:
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.

Keywords:laser cutting laser material processing fiber laser carbon fiber reinforced polymers ultralight aircrafts cutting techniques and parameters

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