2229 KB35 KB199920252015Chen, GenyuDeng, ZhaohuiLiu, WeiRen, YinhuiZhang, GaofengZhang, Xiaohongštevilka:12letnik:61str. 689-697, SI 127ISSN:0039-2480COBISSID:14390555URN:URN:NBN:SI:doc-FJ4EK6CLenZveza strojnih inženirjev in tehnikov Slovenije et al.Strojniški vestnikcirkonijev oksidlasersko izdelane luknjicemokro brušenjeporazdelitevpriprava vrhnje plastisila pri brušenjuLaser-induced deterioration grinding of zirconium oxide (ZrO2) - generation of layer patterns and performance evaluation|Laser-induced deterioration was proposed for the wet grinding of zirconium oxide (ZrO 2 ) ceramic used in the dental, semiconductor and automotive industries. The mechanisms for laser induced deterioration and wet grinding of the deterioration layer were theoretically analysed, and the four key processing parameters that determine the micro-topography and distribution of the laser-induced crater were proposed, including the laser power density I p , the defocus distance z, the laser spot overlap ratio U s and the laser scanning track line overlap ratio U l . Further, the forming mechanism of the single pulse-induced crater under different laser power densities, the defocus distance, and the interaction mechanisms between adjacent spots along the longitudinal and transverse directions were investigated. The optimal values of the key processing parameters were identified. To further evaluate the effect of laser-induced deterioration objectively, a comparative experiment was conducted under laser-induced deterioration wet grinding (LIDWG) and conventional grinding (CG) conditions. It was found that the procedure of laser-induced deterioration had a strong influence on the grinding results. The normal and tangential grinding forces for LIDWG condition were lower than for CG condition, with a maximum reduction of 59.2 % (62.9 %)Kljub vse večjemu povpraševanju po izdelkih iz cirkonijevega dioksida je širjenje uporabe omejeno zaradi majhnih stopenj odvzema materiala in visokih stroškov obdelave, ki presegajo 75 % stroška komponente. Razrešitev težav, povezanih z natančnostjo in učinkovitostjo obdelave keramike ZrO2, je zato pomembna za proizvodno industrijo. Za tradicionalno lasersko podprto brušenje (LAG) so značilne omejene možnosti uporabe hladilne tekočine in površinske/podpovršinske razpoke, ki se tvorijo zaradi akumulacije toplote. Te težave predstavljajo ozko grlo pri praktični uporabi LAG in zato je predlagana nova strategija za lasersko pripravo površine keramike ZrO2 na mokro brušenje (LIDWG). Cilj LIDWG je nadzorovano poškodovanje vrhnje plasti v enakomernih vzorcih kot priprava na visokoučinkovito brušenje. Proces LIDGW je sestavljen iz dveh različnih podprocesov: priprave in brušenjaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Fakulteta za strojništvo