نتایج جستجو برای: die steel

تعداد نتایج: 205411  

2011
PK Sharma Rohit Kumar P Sreenivas

The main body of primary system valves discussed in this paper is made of stabilized austenitic stainless steel and are of intricate shapes & sizes. These bodies are produced through close die forging route and are manufactured first time in Indian forging shops. Finished forgings produced through three stage close die forging process are subjected to comprehensive quality assurance plan at eac...

Journal: :The journal of contemporary dental practice 2013
Yamini Nandini K B Vinitha Supriya Manvi M Smitha

BACKGROUND This study was conducted to compare the linear dimensional accuracy of die materials before and after disinfection of the impression. Type IV and V conventional dental stone, type IV-resin impregnated and copper-plated die materials were studied. MATERIALS AND METHODS A stainless-steel master die analogs to a complete veneer crown preparation with three scribed lines (I: vertical, ...

2009
Andres Bustillo Javier Sedano Leticia Curiel José R. Villar Emilio Corchado

In this paper we present a soft computing system developed to optimize the laser milling manufacture of high value steel components, a relatively new and interesting industrial technique. This multidisciplinary study is based on the application of neural projection models in conjunction with identification systems, in order to find the optimal operating conditions in this industrial issue. Sens...

2012
B. Rossi

Cold-formed structural sections are manufactured at ambient temperature and hence undergo plastic deformations which result in an increase in the yield stress and ultimate stress, but reduced ductility. This paper begins with a comparative study of existing predictive models to harness this strength increase. Modifications to the existing models are then made and an improved model is presented....

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه سیستان و بلوچستان 1390

seismic retrofit strategies have been developed in the past few decades following the introduction of new seismic provisions and the availability of advanced materials and methods. it can be observed that new approaches to deal with more lateral forces are more innovative and more energy absorbent. in line with this, there is a growing trend toward the use of steel shear walls as a system with ...

Journal: :Development 2006
Christopher Runyan Kyle Schaible Kathleen Molyneaux Zhuoqiao Wang Linda Levin Christopher Wylie

During germ-cell migration in the mouse, the dynamics of embryo growth cause many germ cells to be left outside the range of chemoattractive signals from the gonad. At E10.5, movie analysis has shown that germ cells remaining in the midline no longer migrate directionally towards the genital ridges, but instead rapidly fragment and disappear. Extragonadal germ cell tumors of infancy, one of the...

Journal: :Dental materials journal 2015
Heike Rudolph Michael R S Graf Katharina Kuhn Stephanie Rupf-Köhler Alfred Eirich Cornelia Edelmann Sebastian Quaas Ralph G Luthardt

Among other factors, the precision of dental impressions is an important and determining factor for the fit of dental restorations. The aim of this study was to examine the three-dimensional (3D) precision of gypsum dies made using a range of impression techniques and materials. Ten impressions of a steel canine were fabricated for each of the 24 material-method-combinations and poured with typ...

2016
Hongjin JUNG Eiji SHAMOTO Takashi UEYAMA Seiji HAMADA Liangji XU

Ultrasonic elliptical vibration cutting has recently been utilized in industry for finishing of various precision parts such as mirror surface finishing and precision micro machining of dies and molds. However, its application has been limited to high-cost ultra-precision machining, where depth of cut is typically in a range from a few micrometers to several tens of micrometers due to power lim...

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