نتایج جستجو برای: cold forming machine
تعداد نتایج: 477734 فیلتر نتایج به سال:
در این پایان نامه در ابتدا دلایل شکل گیری آلاینده ها در شرایط cold start و warm up و راهکارهای کاهش آنها ارائه می شود. در ادامه، بهینه سازی فرایند شکل گیری مخلوط هوا و سوخت از طریق کنترل دقیق نسبت هوا به سوخت بعنوان یکی از بهترین راهکارهای عملی کاهش آلاینده ها در شرایط cold start و warm up با جزئیات کامل مورد بررسی قرار می گیرد. مدل بدست آمده (برای موتور پیکان انژکتور)، شبیه سازی می شود و نتایج...
Ultrasonic vibration assisted single point incremental forming (UVaSPIF) is based on localized plastic deformation in a sheet metal blank. It consists to deform gradually and locally the sheet metal using vibrating hemispherical-head tool controlled by a CNC milling machine. The ultrasonic excitation of forming tool reduces the vertical component of forming force. In addition, application of ul...
BACKGROUND Graft reperfusion poses a critical challenge during liver transplantation and can be associated with hemodynamic instability/postreperfusion syndrome. This is sequel to ischemia-reperfusion injury and normothermic machine preservation (NMP) may affect hemodynamic changes. Herein, we characterize postreperfusion hemodynamics in liver grafts after NMP and traditional cold preservation....
PURPOSE OF REVIEW Organ shortage in transplantation medicine forces surgical research toward the development of more efficient approaches in organ preservation to enable the application of 'less than optimal' grafts. This review summarizes current techniques aiming to recondition cold-stored organ grafts prior to transplantation to reduce reperfusion-induced tissue injury and improve postimplan...
Abstract The novel Hot Forming and cold die Quenching (HFQ®) process can provide cost-effective complex deep drawn solutions through high strength aluminium alloys. However, the unfamiliarity of new prevents its widescale adoption in industrial settings, while accurate Finite Element (FE) simulations using most advanced material models take place late design processes require forming expertise....
Abstract Progress in applied research for sustainable machine tools and forming technologies bases upon industrial environmental requirements resource efficiency. Relevant technical trends base impact studies projects on the lifecycle consumption manufacturing processes systems. This paper gives an overview about a unified methodological approach of evaluation efficiency tools. It answers scien...
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