نتایج جستجو برای: cold forming machine
تعداد نتایج: 477734 فیلتر نتایج به سال:
Air pollution is one of the most important problems in urban areas that always threaten citizen's health. Photochemical smog is one of the main factors of air pollution in large cities like Tehran. Usually smog is not only a part of nature, but is being analyzed as an independent matter, which highly affects on the nature. It has been used as relationship between atmospheric elements such as te...
Abstract The effects of different cooling rates (0.05 °C s ?1 , 0.1 and 0.2 ) on the microstructure mechanical properties 1000 MPa grade automobile steel for cold forming after two-phase annealing were studied. experimental was observed by SEM TEM, its tested a universal tensile testing machine. results showed that increasing rate annealing, more massive retained austenite, uniform fine ferrite...
The study aims to substantiate the design and parameters of comb-forming device with elastic rods. basic principles methods classical mechanics, mathematical analysis statistics were used in this study. authors proposed a machine rods for sowing cotton on combs. main amount vertical load working body are justified by experimental studies. It is established that diameter 3 mm rod, number 64 piec...
ColdZyme® Mouth Spray (ColdZyme) is a mouth spray intended to reduce the probability of catching a cold and/or can help shorten the duration of a cold if used at an early stage of the infection, by forming a barrier on the pharyngeal mucous membrane. This study evaluated the preventative effect of ColdZyme on common cold infections in personnel at elderly care facilities, and assessed the level...
Cold forging is widely used in many industries. Multi-stage cold forming usually utilized fasteners. In this study, numerical simulation and experimental investigations were carried out on a five-stage cold-forming process for the manufacturing of low-carbon steel AISI 1010 relief valve regulating nuts. The through five stages included preparation centering backward extrusion, extrusion over di...
OBJECTIVE Hypothermic machine perfusion may improve outcome after transplantation of kidneys donated after cardiac death (DCD), but no sufficiently powered prospective studies have been reported. Because organ shortage has led to an increased use of DCD kidneys, we aimed to compare hypothermic machine perfusion with the current standard of static cold storage preservation. METHODS Eighty-two ...
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