Evaluation of tooth root stress control on reconstructed gear model made from polymer material

Dandanes se velik del razvoja posveča iskanju bolj varčnih rešitev za izdelavo izdelkov. Eden od pogosto uporabljenih načinov je izdelava z uporabo polimernih materialov. Težava je v tem, da imajo polimerni materiali v primerjavi s kovinskimi materiali veliko slabše mehanske lastnosti. Zaradi tega je pri razvoju potrebno veliko pozornosti nameniti temu, ali bodo lastnosti izdelka ustrezale namenu. Cilj zaključne naloge je bil izdelati čim bolj natančno rekonstrukcijo zobnika iz polimernega materiala PA11 z uporabo SLS tehnike 3D tiska. V drugem delu so primerjani rezultati korenske nosilnosti zoba, pridobljeni na tri različne načine. Ti trije načini so bili izračun po priporočilih iz standarda VDI 2736, izvedba simulacije v programu ABAQUS ter izvedba mehanskega preizkusa. Ugotovili smo, da sta mehanski preizkus in simulacija dala podoben rezultat sile in deformacije, medtem ko je preračun po priporočilih dal občutno manjše vrednosti.A lot of development is dedicated to finding new, cheaper and more economical ways to make products. One of the commonly used procedures is to make products from polymer materials. The problem is that polymer materials are weaker when compared to metals. When a product from a polymer material is designed, it needs to be checked, if the part is still strong enough to whitstand the loads. Our objective was to create a reconstruction of gear from polymer material PA11 with use of SLS 3D printer. Next, the results of gear root tooth stress calculacions were compared for three different methods. These methods were calculation of gear root tooth stress with equasions from standard VDI 2736, numerical simulation in ABAQUS and gear testing on stress testing machine. It was found out, that gear testing and simulation gave pretty similar results, but calculation results according to VDI recommendations were a lot smaller