Metrological support to producing thermoelectric sensors for short-time molten-metal temperature monitoring

1990 ◽  
Vol 33 (6) ◽  
pp. 589-591
Author(s):  
I. E. Dobrovinskii ◽  
N. M. Kutergina ◽  
I. P. Kuritnyk ◽  
R. A. Sasinova
2008 ◽  
Vol 141-143 ◽  
pp. 191-194 ◽  
Author(s):  
Jin Kyu Lee ◽  
Shae K. Kim ◽  
Young Chul Lee

Novel hot chamber rheo-diecasting process has been successfully developed. It requires no additional processing equipment except commonly used hot chamber diecasting machine, no molten metal control like grain refinement procedure and no additional cycling time to produce slurry-on-demand. Additionally, it could lower molten metal temperature in a furnace. Process concept of novel hot chamber rheo-diecasting is simply based on the paradigm shift from HOW to WHERE for producing slurry-on-demand. This paper will demonstrate the possibility to achieve slurry-on-demand by novel hot chamber rheo-diecasting and the advantages for 3Cs applications.


1999 ◽  
Author(s):  
Y.B. Bragina ◽  
I. V. Bragin ◽  
V.P. Sgibnev ◽  
S.I. Bragin ◽  
I.A. Zheltikov ◽  
...  

2018 ◽  
Vol 925 ◽  
pp. 491-498
Author(s):  
Ryosuke Tasaki ◽  
Hideto Seno ◽  
Kunihiro Hashimoto ◽  
Kazuhiko Terashima

The sand mold press casting method is a novel iron casting process, which has developed by our group in recent years. The proposed method can cast iron into complex shapes with a high yield over 90% and produces high-quality products by filling control of molten metal during pressing motion. However, molten metal inside mold is cooled down by heat transfer to the molds and atmosphere, and often causes solidification before the end of press. Then, the pressing movement of the upper mold is blocked by the solidified metal. Therefore, to avoid the solidification during pressing sand mold, metal temperature must be heated properly to estimate the filling temperature decrease behavior based on analysis results of CFD simulator, FLOW-3D. The necessary condition not to solidify molten metal before the end of press has been found. It was made clear that the mold must be heated up to the necessary temperature beforehand in the pressing process. Furthermore, optimum velocity reference with specified pressure constraints has been designed to prevent casting defect such as penetration and also to minimize the temperature decrease. In this paper, optimum velocity control of servo cylinder considering the both of allowable pressure of molten metal and starting time of solidification is proposed by using a theoretical approach of Model Predictive Control: MPC method. The effectiveness of the proposed control system has been demonstrated by computer simulation and experiments using a laboratory scale machine with molten metal of casting iron.


2019 ◽  
Vol 13 (3) ◽  
pp. 611-617
Author(s):  
Toru Maruyama ◽  
Mitsuyoshi Tamaki ◽  
Gou Nakamura ◽  
Keisuke Nakamura

2018 ◽  
Vol 85 (5) ◽  
pp. 817-822 ◽  
Author(s):  
Zeng Qiang ◽  
Pan Congyuan ◽  
Fei Teng ◽  
Ding Xiaokang ◽  
Wang Shengbo ◽  
...  

1993 ◽  
Vol 25 (3) ◽  
pp. 199-200
Author(s):  
K.-E. Peiponen ◽  
R. Silvennoinen ◽  
C. Gu ◽  
J. Uozumi ◽  
T. Asakura ◽  
...  

2018 ◽  
Vol 41 ◽  
Author(s):  
Barbara A. Spellman ◽  
Daniel Kahneman
Keyword(s):  

AbstractReplication failures were among the triggers of a reform movement which, in a very short time, has been enormously useful in raising standards and improving methods. As a result, the massive multilab multi-experiment replication projects have served their purpose and will die out. We describe other types of replications – both friendly and adversarial – that should continue to be beneficial.


2000 ◽  
Vol 179 ◽  
pp. 197-200
Author(s):  
Milan Minarovjech ◽  
Milan Rybanský ◽  
Vojtech Rušin

AbstractWe present an analysis of short time-scale intensity variations in the coronal green line as obtained with high time resolution observations. The observed data can be divided into two groups. The first one shows periodic intensity variations with a period of 5 min. the second one does not show any significant intensity variations. We studied the relation between regions of coronal intensity oscillations and the shape of white-light coronal structures. We found that the coronal green-line oscillations occur mainly in regions where open white-light coronal structures are located.


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