Multicriterial optimisation of polymer gear pairs

Polimerni materiali se vedno bolj uporabljajo pri izdelavi zobnikov, saj so zaradi nizke cene, enostavnosti izdelave, manjše teže ter drugih lastnosti v veliko primerih bolj primerni kot kovinski. Slednji imajo, zaradi svoje dolgoletne tradicije, veljavne mednarodne standarde za preračun nosilnosti, polimerni materiali so podprti le z relativno novimi priporočili VDI 2736: 2014, ki so zelo skopa z materialnimi podatki potrebnimi za preračun. Priporočila predpisujejo način preizkušanja novih materialov, vendar pa ta zahteva posebne pogoje izvajanja, ki jih mnogi ne bi mogli izpolniti. V okviru magistrske naloge je bil izdelan računalniški program za preračun polimernih zobnikov glede na korensko in bočno trdnost ter na temperaturo. Program omogoča večkriterijsko optimiranje polimernih zobniških dvojic zasnovanih iz materialov podanih v priporočilih VDI 2736: 2014, hkrati pa dodatno omogoča vnašanje novih materialov in izvajanje preračuna z le temi. V sklopu naloge je bila prav tako razvita metoda za določevanje časovne trdnosti polimernih materialov na osnovi izvedenih testov. Uporabniški vmesnik omogoča naknaden vnos podatkov o časovni trdnosti. Pravilnost preračuna zobnikov je bila verificirana.The use of polymer materials in gear manufacture is constantly increasing. Due to the low cost, ease of manufacture, light weight and other characteristics of such materials they are in many cases more suitable than conventional metals. The latter have, due to their long use, valid international standards for calculating carrying capacity. On the other hand, polymer materials only have VDI 2736: 2014 guidelines, which describe only a handful of materials with the data necessary for calculations. The guidelines prescribe a testing procedure for obtaining more data, but this procedure is complicated and thus unavailable to many. In the scope of this Master\u27s thesis a computer program was developed, which provides calculations of gear root and flank load-carrying capacity and temperature. The program offers multicriterial optimisation of polymer gear pairs in accordance to the VDI 2736: 2014 guidelines. Additionally it has the capability to accept material data obtained by the user and use it in calculations. Additionally, in the course of this thesis, a method of obtaining material fatigue strength was developed, the results of which can be added into the program by the user thus enabling calculations with new materials. The correctness of the calculation was verified