Abstract To reduce the tooth surface measurement error of spiral bevel gear, a registration method using an improved genetic algorithm (GA) was proposed according to measuring principle coordinate machine (CMM). improve performance GA, unit quaternion used limit initial population generation space, and then simulated annealing search process. Finally, measured theoretical matched. Experimental ...

The spiral bevel gear (SBG), with its high contact ratio, high strength and smooth driving, is widely used to transmit dynamic power in various mechanical products, including vehicles, mining machinery, aerospace engineering, and helicopters [1] to [4]. Typical SBGs are shown in Figs. 1a and b. The SBG has been a subject of research for almost a century, and there is a significant amount of lit...

AMAÇ: Farklı kırık hattı şekillerinin ve aralıklarının grafen oksit ile tamir edilmiş polimetil metakrilat (PMMA) rezin örneklerinin kırılma dayanımına olan etkisinin araştırılmasıdır. GEREÇ VE YÖNTEMLER: 65×10×3 mm boyutunda 50 adet standart mum örnek metal bir kalıp kullanılarak hazırlandı. Hazırlanan örnekler 5 gruba (n=10) ayrıldı; grup 1: kontrol grubu (kırık oluşturulmayan), 2: 0 boşluk d...

in order to help in the engineering design of rice harvesting machines, there is a need to have exact information concerning the physical and mechanical properties of rice stems. the cutting force for rice stems, therefore, was measured by designing and fabricating a static and dynamic shear test apparatus. the effects of moisture levels and the cross-sectional area of stem as well as the varie...

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This review highlights the major efforts devoted to development of molecular gears over past 40 years, from pioneering covalent bis-triptycyl systems undergoing intramolecular correlated rotation in solution, most recent examples gearing anchored on a surface, which allow intermolecular transmission mechanical power. Emphasis is laid different strategies devised progressively control architectu...