KNOWLEDGE development and interchange

Dec 10 2007

Mould and coremaking
Modeling and identification of pouring flow process with tlting-type ladle for an innovative press casting method using greensand mold Yusuke Matsuo*, Yoshiyuki Noda*, Kazuhiko Terashima*, Kunihiro Hashimoto**, Yuji Suzuki***
*Toyohashi Univ. of Technology; **Sintokogio, Ltd.; *** Aisin Takaoka Co., Ltd.
67th World Foundry Congress
Recently, a new method of a press casting using greensand mold was proposed by our group as a means of ferrous casting. This method has advantages in terms of energy savings and cost because a sprue cup and runner channel are not needed. Still, it is important to pour accurately and quickly in this method. Therefore, a feedforward outflow control is presented by using a mathematical model and inverse dynamics. The outflow is measured by ...

Nov 30 2007

Advanced simulation techniques
Prediction of shrinkage defect in steel casting for marine engine cylinder cover by numerical analysis K H Kim*, J H Hwang*, J S Oh*, D H Lee**, I H Kim* and Y C Yoon*
Hyundai Heavy Industries Co., Ltd.,Korea ** Hankuk Heavy Machinery Ind., Korea
67th World Foundry Congress
Shrinkage defect in an alloy steel casting for marine engine cylinder cover was estimated by numerical analysis with reference to casting variables such as riser and chiller. Retained melt modulus was employed as a prediction parameter in this study. Shrinkage defects were developed at the final solidification region. This is associated with hot spots, which could be controlled more effectively by adjusting the height of riser and by att...

Nov 30 2007

Advanced simulation techniques
Nonlinear modeling with Hydrodynamics and flow control using inverse pouring dynamics of tilting-ladle-type automatic pouring process Yoshiyuki Noda*, and Kazuhiko Terashima*,
* Department of Production Systems Engineering, Toyohashi University of Technology
67th World Foundry Congress
This paper is concerned with the pouring control of tilting-ladle-type automatic pouring systems in casting industries. A new approach to the modeling and control system of the pouring process is proposed. In the approach, the flow rate model is described by a nonlinear system with hydrodynamics. The flow rate control system is built by a feedfoward control using the inverse dynamics of the flow rate model. In this control system, contro...

Nov 30 2007

Metal matrix composites
Production of hybrid metal matrix composites and its wear behavior Mahendra K. V *, and Dr. K. Radhakrishna **.
*New Horizon College of engineering, Bangalore, Ind.**B.M.S. College of engineering, Bangalore, Ind
67th World Foundry Congress
Metal matrix composites are engineered materials formed by the combination of two or more dissimilar materials (at least one of which is a metal) to obtain enhanced properties. In the present investigation Al-4.5%Cu alloy was used as the matrix and fly ash & silicon carbide (SiC) as filler material. The composite was produced using conventional foundry techniques. The particulates were added in 5%, 10% and 15% by weight to the molten...

Nov 30 2007

Metal matrix composites
Production, evaluation and comparison of mechanical, wear, and corrosion properties of Al-Flyash1 and Al-Flyash2 metal matrix composite M.Ramachandra and K.Radhakrishna
BMS College of Engineering, India
67th World Foundry Congress
In the present investigation, Aluminium based particulate composites containing 15 weight percentages of two types of flyash particulates as reinforcement were synthesized using stir-casting method and their properties are compared. The properties like density, sliding wear, hardness, slurry erosive wear and corrosion resistance of the composites were investigated and their properties are compared. The results of wear studies have shown ...