1 B $ <JC *M I0 N IJ /> KF$ CL 9 /. $G 6 'O

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1 1 B $ <JC *M I0 N IJ > KF$ CL 9. $G 6 'O %* 04 #M #$ H#* # H *P QG4 <5U K04 6?*@ * #S Effect of various bottom gating system designs on fluid flow and solidification behavior of a cylindrical casting A. Khoshkharam, M. Divandari, S.M.A. Boutorabi Iran University of Science and Technology #$Sh X.* W*FM # *G <8 X$% < ** N X 0.. * 'O R * Gd 1 B I0 N IJ >6> > KF$ %b$ = &$dm% J < A. JC. $G.<= O * <FJ7 N= B*% H *0$J 420. #M.* #>*P CL <@C X $9 R. J <4 W\ *U HW\ b <JC * 'O #$@*% # 1$ X J $$s% #U 40 % 35 #M # 1 > CL #.#A <# #U 36 *# <FJ7 N= 6> > KF$ :#$0J 0J Abstract: Computer simulation of the casting process is becoming and indispensable tool in the effort to achieve high casting yield. In this work, the fluid flow and solidification behavior of a 420 kg weight cylindrical shape casting is studied. Various bottom gating systems were designed and simulated using one of the available simulation software in the foundry market. Results showed less surface turbulence would be realized when metal entrance velocity in the gate was limited below one meter per second. Casting yields were changing between 35 to 40 percent and the best result was obtained in 36 percent. Key words: fluid flowprocastcylindrical shape

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15 b < JC) N I J 8J >CL.٤ # $@*% > PA J 5 < $0 O H(W\ <4 W\ y %<$V$J 'O.# 1ms. G>) *4 >G> W\ 5J S.٥ * J = 8P o$@ (*V$.<F$ \7S R. W\ <P*5S l.*% W*0' <@C.٦.< A L > G> R * HG>.b y HW\ KL8% # A.٧ = J < <$V$J 'O #$@*% *% # >6> KF$ J *L H<F$ > 1 # G \ < P*5S l.*%.# 'O $1$ :. #5%G4 ;C &$dm% < JC * M X$ $% <4 >.١ CL < $0 O < #5* $F W\.#5J *. W\ <P*5S l.*% o t > G> > CL.٢ x P HoS J G> 65 >G> > # K>= W\ <P*5S <4 c> J >G> cn= S J XN6 > 5N. # ** \.#* W*FM CL > 6> K F$ # \ <P*5S l.*% 5J.٣ 5 < \ 7 S ;* *U Bd= G> >G>. #%. V CL (os J 65) >. <*@ > l [1] Grube, K., J.G. Kura, and J.H. Jackson, The study of vertical gating. AFS Transactions, : pp [2] Grube, K.R. and J.G. Kura, The study of vertical gating. AFS Transactions, : pp [3] Beeley, P.R., Foundry Technology. 2001, Oxford; Boston: Butterworth Heinemann. [4] Campbell, J., Castings Practice: The Ten Rules of Castings. 2004: ButterworthHeinemann. [5] Tiedje, N. and P. Larsen, Investigation of the stability of melt flow in gating systems. Metallurgical and Materials Transactions B, (1): p [6] Hwang, L.R., T.S. Shih, and S.S. Hsiau, Effect of viscosity on fluid flowin gating systems. AFS Transactions, : pp <5U K04 6 :1376.>6> > KF$ CL X* 6H.S>.w. H %* [٧] [8] Reilly, C., N. Green, and M.R. Jolly, The present state of modeling entrainment defects in the shape casting process. Applied Mathematical Modelling, (3): pp [9] Larsen, P., Iron Melt flow in thin walled sections small cast in vertically parted green sand moulds, Phd Thesis. [10] Symposium on Principles of Gating. 1951: American Foundrymen's Society [11] Sirrell, B., M. Holliday, and C. Campbell, Benchmark testing the flowand solidification modeling of Alcastings. JOM, (3): pp [12] Sun, W. and C.E. Bates, Visualizing defect formation in gray iron castings. AFS Transactions, Xu, Z.A. and F. Mampaey, Experimental and simulation study on mold filling with various gating.systems. AFS Transactions, : pp [١٣]

16 [14] ASM International. Casting Design and Performance. ASM International, [15] Jain, P.L., Principles of Foundry Technology. 1979: McGraw Hill. [16] Rao, T.V.R., Metal Casting : Principles and Practice. 1996: New AgeInternational Publishers. [17] Rao, P.N., Manufacturing Technology. Vol : Tata McGraw Hill.. :1368.>#h \\s% >6> >KF$ CL *UH.C HFP. :1361H\ \s% >6> F$ G #hh.n7 H [١٨] [١٩] [20] Magma, International Usermeeting 2006, Committed to Casting Excellence c>] 7 N J GP HX$ *7 'O #5A=.$G CL H.S> H. H0 [٢١] P H86 HK> H1392..?*@ 104 ٣٢

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