نتایج جستجو برای: drawing forming

تعداد نتایج: 161973  

Journal: :Arts in Psychotherapy 2022

Experimental research on the psychophysiological effects of different art materials and tasks is still scarce. This mixed methods focused physiological changes emotional experiences in drawing clay forming during copying, creating novel designs free improvisation within fast slow timeframes. It combined an experimental setting analysis 29 participants’ physiology with a qualitative content 18 s...

Journal: :Journal of Japan Institute of Light Metals 2010

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی امیرکبیر(پلی تکنیک تهران) - دانشکده مهندسی نساجی 1386

در این پژوهش خواص ساختاری ضریب شکست مضاعف و خواص حرارتی و خواص فیزیکی خواص کششی جمع شدگی و خواص موحی نخ های نوریس تولید شده در سرعت های برداشت متفاوت کشیده شده و تکسچره شده از چهار نوع پلیمر پلی اتیلن ترفتالات stpc ایران zorlu ترکیه saehan کره و sabic عربستان سعودی که در ویژگی های پلیمر اولیه مانند ویسکوزیته پلیمر مقدار گروههای انتهایی آن و مقدار degو tio2 آنتیموان و غیره متفاوت هستند بررسی شد....

Journal: :نشریه دانشکده فنی 0
قادر فرجی دانشگاه تهران محمدکاظم بشارتی گیوی دانشگاه تهران سعید یارمحمدی دانشگاه تهران محمود موسوی مشهدی دانشگاه تهران

deep drawing of cylindrical shapes with high limiting drawing ratio (ldr) values is relatively difficult. annealing is a further operation, which in turn adds costs and consumes significantly time to the forming process. in the present work, cylindrical cups from brass sheet were made with only limited anneal during few steps, but having ldr of 9 that is about 2 times higher than previous works...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه فردوسی مشهد - دانشکده ادبیات و علوم انسانی دکتر علی شریعتی 1392

the present paper investigates how far ideologies can be tease out in discourse by examining the employed schemata by two ideologically opposed news media, the bbc and press tv, to report syria crisis during a period of nine months in 2011. by assuming that news is not a valuefree construction of facts and drawing on micro structural approach of schema theory, for the first time in discours...

There are mainly two methods of deep drawing analysis; experimental and analytical/numerical. Experimental analysis can be useful in analyzing the process to determine the process parameters that produce a defect free product, and the analytical/numerical modeling can be used to model and analyze the process through all stages of deformation. This approach is less time consuming and more econom...

2014
Lixiao Wang Gang Fang Lingyun Qian Sander Leeflang Jurek Duszczyk Jie Zhou

Magnesium alloys have, in recent years, been recognized as highly promising biodegradable materials, especially for vascular stent applications. Forming of magnesium alloys into high-precision thin-wall tubes has however presented a technological barrier in the fabrication of vascular stents, because of the poor workability of magnesium at room temperature. In the present study, the forming pro...

2016
Bor-Tsuen Lin Cheng-Yu Yang

The developers of high aspect ratio components aim to minimize the processing stages in deep drawing processes. This study elucidates the application of microridge punches in multistage deep drawing processes. A microridge punch improves drawing performance, thereby reducing the number of stages required in deep forming processes. As an example, the original eight-stage deep forming process for...

2004
A. Kratky G. Liedl R. Bielak

In the current work, cup drawing experiments with laser assistance are presented where only selected areas of the work piece have been heated up. Since the strongest deformations occur at the outer circumference of the blank, only that area has been heated up by a defocused laser beam. Selective laser heating of the work pieces was performed by diode as well as Nd:YAG laser radiation. The formi...

In this paper, the drawing process of multi-layer sheet metal through wedge shaped die has been analyzed using stream function and upper bound method. Typically a sandwich sheet contains three layers of metal, where the outer layers are of the same thickness and material and different from those of the inner layer. In this study, a new deformation model has been introduced in which inlet and ou...

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