background: welding emits harmful rays to the eyes. we evaluate and compare the uv, blue light and ir transmittance characteristics of some currently available welding safety protectors with ansi z87.1 criteria. materials and methods: three type of welding safety protectors (three of each type) have been evaluated for spectral transmittance. one-sample t-test was performed to establish is there...

The large problem to create manual welds of constant high quality results from missing optical information during the actual welding process. Due to the extreme brightness conditions e.g. in arc welding and the use of protective glasses even experienced welders can hardly recognize details of the welding pool, the welding seam and the environment. This paper describes a new research project for...

1 Supported by the German Federal Ministry of Education and Research (bmb+f) Abstract The large problem to create manual welds of constant high quality results from missing optical information during the actual welding process. Due to the extreme brightness conditions in arc welding and the use of protective glasses, even experienced welders can hardly recognize details of the welding process a...

Background and Objective: Non-ionized radiation from arc welding may cause retinal lesions such as photo retinitis. In this report, a patient with bilateral macular bleeding which had been caused by inappropriate use of protective safety glasses is introduced. Case Report: On 26 July 2008 a 23-year-old male with blurred vision was referred to Shahid Beheshti's faculty of Rehabilitation Clinic....

Previous reports of ultrafast laser welding of glass-to-glass have indicated that a pre-existing optical contact (or very close to) between the parts to be joined is essential. In this paper, the capability of picosecond laser welding to bridge micron-scale gaps is investigated, and successful welding, without cracking, of two glasses with a pre-existing gap of 3 µm is demonstrated. It is shown...

The friction welding of Zr55Al10Ni5Cu30 bulk metallic glasses (BMG) has been tried. An apparatus for the friction welding of BMGs adopting a pneumatic cylinder and gripper based on a conventional lathe, and a welding process which provides a sufficient cooling rate after welding were devised. Friction time and friction pressure were chosen as the control parameters in the friction welding proce...

© 2016 Journal of ophthalmic and Vision research | published by Wolters KluWer medKnoW Dear Editor, All types of welding produce ultraviolet (UV), visible, and infrared (IR) radiation at damaging levels.[1] Photokeratoconjunctivitis (welder's flash), pingueculum, pterygium, corneal opacity, and pigmentary macular deposits are common eye disorders among welders.[2-4] Use of protective eyewear wh...

A novel welding technique of diffusion bonding for Zr-Cu metallic glass with pre-oxidized surfaces is proposed in this study, which systematically investigated by molecular dynamics (MD) simulation. Compared the conventional technique, process can be well implemented below crystallization temperature glass. The obtained structure possesses glass–glass interfaces (GGIs) similar those nano-glasse...

High-rate squeezing process of bulk metallic glasses from a cylinder into an intact sheet achieved by impact loading is investigated. Such a large deformation is caused by plastic flow, accompanied with geometrical confinement, shear banding/slipping, thermo softening, melting and joining. Temperature rise during the high-rate squeezing process makes a main effect. The inherent mechanisms are i...