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$ %# & # $ ! ” . 8 17
7 )6 6- / “. 3″ ” 4 5 ” .# ’( ” )* +# +,# – . -/ / 0 12
> 6! 6″ ?5 6 .6 6# >6?& # +, 5 @ ?5 A ” – < = ” :; ; .”84 9-
64 5 ” . # G +; . # ++C5 +D ” EF# . . ( + B ’( . ” ) ’ + # 5
6″ 6 4 6+K5 6; . 7 . . . H- 0+- IB 0+- # 5 J3″ ++C5 +K5 3+ + # ” > 6& L+6K# * 6 6++C5 6K# 364 6! 6; . ” # $ F-& +K5 ; . . ! * # $ F-& +K5
6 ! 6″6 +D ) ” ?5 +$ . & ’FFK# N -& ” , F# .& ” ?5 < %# +,H5 M+: 5 ” ) ANSYS3
./ . H- ’ + # 5 < EO# ” ’ 5# +D N -& 7 . # ’%& E F# N -& . #( 0+- IB 0+- # 5 +K5 ) )* : < 9 :;
Thermo-Elastic-Plastic Analysis of Plate Forming Process by
Flame Bending Method
Seyyed Jalal Hemmati, M.A. Niazi, M. Maarefat, and R. Naghdabadi
Faculty of Engineering, Tarbiat Modarres University
Mechanical Engineering Department, Sharif University of Technology
Abstract: Flame bending process is one of the forming processes of steel plates. During this process, plate is formed with heating by gas torch flame followed by controlled cooling along specified paths. Considering simple tools used in the process, it is
a popular and economical forming method. At present, this process is manually done on the basis of skilled technician’s

!& ** . /! 0123’ ! &*

experience. Experimental and non-automated procedures decrease productivity of the process. In this paper, a method is proposed for simulation of material deformation. Regarding the physics of the process, large deformation thermoelastic-plastic analysis has been applied. In the simulations, a new analytical solution is used for thermal analysis of plate. The analytical solution along with finite element analysis of the deformation in ANSYS program is able to interpret experimental observations. The simulations show reasonable results, compared with the analytical results by other researchers and with experimental data. The method and simulation results can be used to study the process automation.
Keywords: Plate forming, Flame bending process, Thermo Elastic Plastic Analysis
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8077201141984

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j< ?ANSYS r Q.’ G / F =~.II[P !? Y 0rp .!1 * o . j~I’ ~ 1 .P 0: IX i .F
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5N+ 1 – W % 8V

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No. h
(mm) v
(mm/s) qeff
(cal/s) (mm-2)
5 z 5/55z4

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5

5/55
y/ y55 5/55y
& &# 4 z& &4 y55 5/55y
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5/55y
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<<_ ’ B<< : =73<< r<</. 1 XE : ‘<<a *<< / ?<< / *
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4z
H < < E < .D i!? ? < 0: ) 0 .F ( ) ! 7 r<</. P .<<W zcal/sec =73<< .}1<< K 1<<P .
.<h’ ! 5mm/sec =73< E.< ? 5/55y mm 2 KL
.’ H .D
::’ s XE ?F } ! 1 j .D T 19
cp = 0.098 cal/gr. Co
k = 0.016 cal/ mm.sec.oC(y)
= 0.00782 gr/ mm3
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? H < ‘~E J ? i ? : =~ .II[P ? C 9 KL K Q.D <| 0 1<N <F . < |j< =I 0R ? F KL
? K )<~ g? ?! .<; k<a X . P 7F F = 5/ : X . P
. 5/55 rad .F .F X . P <F J ? 0 Y <Z \ X ’ H .’ (5)=~ ! b< jW.E +p ! ’ s U ( H .’ U ( 0:
Q.<D H1<p? J ? rF =~ .II [P F . B ! . H
Y <Z .< +F s <XEF .; 19 H I3| J ? j 3a ? H
: 1<h < .!1<F <; 19 j <p <F p i ! rI’ J ? j’ I
=~< B ! . s Y Z B )X’ X \ X ’ s XE
i .<F j<? < K )<8 7 _ .; 2I ’ 5/ 0: F
1<F. j Y ! . !1F ; 19 s? J ? . | i +’ :
Q < P i .<F y i ! ’ \ X ’ [5] o t ’ F
B< ! H < Q.<D <p? ! ^<> ? ’ j 7 X ’
()=~< <F 1<p<F | *P 1Z ! .’1 j O)X
B ! HQ.<D <p? ! J ? r/.<<<_ ’ !1 j H ; <3

M E- 1 _ J * #+ * /- .^
[=a] Q& E ‘ /
@ <F J X_’ P !1 ( ’ 5/55z4 mm 2 67 r/. P .W [5]^ <p. ! 67 < r </. P . <W .!1 <H ; 3 <
B< ! 67< B .F < F . H H!: BI (P 5/55y mm 2
.!1 * * IF CIa .P H!.3 R
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g? ? s I<W. .!.</ ) [5]^p. ! H Q E t ’
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H< H!< H! < r<F =~< .II[P ? Ia /
B ? <P v< 1 !1<9 =8< .II[P .<S6I6YP’.F .
j< .F K = > H a K! ! : i.ID16p i .F ? H!.|
<| <F «*F ( ’ H I; | i.IS .S ’ » g? s X Y g? s <I rp ? < i < F C s U(3 . H!.F
0 .<F < . <’ H 3<’ .<| i. <I S .S ’ i .<F H E t < ’ <F *<67 g? : H L ! F t ’ . 3IF * .F
[email protected] 1.P 0!E / = I6YP G [5]^ p.
<F B .< P B< ! .< H < H! ! IP.P rI’ GIa
.<II[P ? * < .D 0 +6I6YP 0?! .; ANSYS ’.F G /
G< !r’ 0 .<F .’H Q 2’ !? Y 0rp g? F =8
: [5] <o =< I6YP <F <2 0! E =I6YP O . K!1F
H H! ANSYS! HI; / 0. IS .S ’ s ’ 8
.

‘ / M [=a]1 _ c _> * O / 8b

‘ / M [=a]1 _ d6 e _/+ O / 8=a

’ ?0 W+ < O / 8==
! <X q <| i H < a .<S ! M.N: . 1 7 (5)=~()=~< ! .!1< *< GI <a i 3< C’./ ]!
i < ! <| < B< j J P j_9 C .D .J ? r<|. <_ ’ ! J ? (W i!Ia C’.|
<F 3<S’ F 1_9 ’ H! jS X’ jE1’ C .D O9H < Q.<D <p? r<|. ! <~ <F <p1P F .H b
. <;! j< K 3<’ j~ rI H a B ( )=~ . Lj !1p?.<h’<F < H < g r<D j< Ia C’.| B . 3IF
H a B :?.F (5)=~ ! j67 uI<YP F1F. j Y0 YZ \ X ’ ! 1 ! j 67 u IYP t ’ j
44
! C < .D O .< . H!.| ( ’ i!? ? 0: )
::’ s XE *
v =1.2[mm/sec]
qeff = 800 [cal/sec] = 0.164[cm 2] u <IYP ?! .<; <F 1<F. K < : &! i +IY (y)=~ ! <+IY !1< j< <hR | 0 1N K ; .’ H H! ! K 3’ K < : –rI9 i ; !1 ’ rI’ (z)=~ ! .’ uX_ b;.F |
B< . <’ H < b< H < Q.<D p? ! J ? r|. _ ’ i .F
?! .<; ! H * IF CIa rI9 | ;! j K 3’ ; !1 ’ s <hY ! H < L < ! <F t ’ : .!1F ; 19 K )~ g? ; 19 I? e1~7 C 9 ]! J ? !1 j hR j F
! 67< r</. P .<W ! <2 ( )? <p : BI< f ; .
! KL .<Ih’ : CIF 67 .}1 7 ? . / * g? <h ’ </ 0 1<N K < ; .!1< *< .D .h’ ! j67 g?
H * IF CIa rI9 K )8



قیمت: تومان


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