HNG DN S DNG PHN MM DEFORM 3D

DEFORM l mt phn mm tnh ton m phng qu trnh da trn phng php phn t

hu hn (FEM) nhm phn tch cc qu trnh to hnh v s l nhit khi to hnh kim loi v cc

cng ngh lin quan. Bng vic m phng qu trnh sn xut trn my tnh, y l cng c tin

tin cho php nh thit k v k s:

Kim nghim cc iu kin trn my tnh m khng cn c nh xng (workshop),

D dng, nhanh chng vi cc gi lp Nu-th.

Ci thin vic thit k dng c v khun mu nhm h gi thnh sn phm, tit kim vt liu.

Rt ngn thi gian tung sn phm mi ra trng.

Cc sn phm ca h thng DEFORM

1. DEFORM -2D (2D)

S dng trn nn UNIX/LINUX (HP, DEC, LINUX) v chy rt tt vi my tnh c nhn

trn nn cc window XP/Vista. C kh nng gii cho m hnh bin dng phng hoc cc chi tit

i xng vi mt m hnh 2 chiu.

2. DEFORM-3D (3D)

S dng trn nn UNIX/LINUX (HP, DEC, LINUX) v cng chy rt tt vi my tnh c

nhn trn nn cc window XP/Vista. DEFORM-3D c kh nng gii c cc bi ton phc tp

vi m hnh 3 chiu v cc c tnh dng chy. N rt l tng gii ci bi ton phc tp khi

bi ton khng h n gin vi m hnh 2 chiu.

3. DEFORM -F2 (2D)

Chy trn nn cc my tnh c nhn ci t Windows XP/Vista. C kh nng gii cc bi

ton vi m hnh 2 chiu i xng hoc bin dng phng. Rt thun li gii vi cc cng

on t nh n trung bnh trong m hnh phn t hu hn.

4. DEFORM F3 (3D)

Chy trn nn cc my tnh c nhn ci t Windows XP/Vista. Gii rt tt trong m hnh 3

chiu v cc bi ton to hnh tri thi thng, m v nng.

5. DEFORM HT

L chng trnh ph tr cho DEFORM-2D v DEFORM-3D. Nh vic b xung cho cc m

hnh bin dng, DEFORM-HT c th m hnh ho cc nh hng ca x l nhit gm c

cng, c ht ca t chc kim loi, bin dng, ng sut d, v hm lng cc bon.

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Mt s sn kt qu m phng s dng phn mm DeForm

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Cc tnh nng:

V bin dng.

M hnh gm bin dng v truyn nhit cho m phng cc qu trnh to hnh trong iu

kin ngui, m, hoc nng.

C s d liu v vt liu phong ph vi nhiu hp kim ph bin bao gm cc loi thp,

nhm, titan, hp kim chu nhit cao.

Ngi s dng c th a vo m hnh vt liu cho loi vt liu bt k khng c trong th

vin vt liu ca chng trnh.

Cho thng tin v loi vt liu, khun, ti, ng sut t khun, ht, cc yu t nh hng

v ph hu do.

Cc m hnh vt liu cng tuyt i, do v do nht, c coi l cc m hnh vt liu l

tng cho bin dng ln.

M hnh vt liu n-do cho cc bi ton ng sut d v n hi.(2D, 3D).

M hnh vt liu xp (porous material) cho m hnh bin dng ca sn phm luyn kim

bt. (2D, 3D ).Trang 3

Tch hp cc m hnh thit b to hnh vi cc loi my nn thu lc , ba, my nn vt

ve, my nn c hc.

Ngi dng vit chng trnh con cho m hnh vt liu, m hnh ng sut, ph hu tiu

chun v cc hm khc (2D, 3D).

FLOWNET (2D, 3D) v d im ( tt c cc sn phm) cho nhng vt liu quan trng

theo thng tin.

V th v nhit , ng sut, bin dng, ph hu v cc bin s n gin khc trong

phn xut kt qu.

T ng t iu kin tip xc ngay trong phn chia li

C kh nng phn tch bin dng a khi cho nhiu phi v phn tch ng sut ca cp

khun (2D, 3D)

Cc m hnh t gy ban u v nt lan truyn da trn nhng thng s ph hu quen

thuc cho php m hnh ho nguyn cng ct, t dp, khoan, bo (2D, 3D).

V x l nhit: M phng qu trnh thng ho, ram, ti

Cc bc c bn trong bi ton m phng s:

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1. M hnh hnh hc:

T yu cu kch thc ca sn phm-> a ra cc khun mu, dng c gia cng, phi thch

hp cho qu trnh to hnh. Cc m hnh hnh hc (gi l m hnh v n l o, khng c thc) c

th xy dng trn cc phn mm khc nh solidwork, Catia.. v lu di ui *STL sau nhp

vo DeForm thit lp m hnh bi ton.

2. M hnh vt liu.

M hnh vt liu(Material Model-MM) cho cc i tng c nhp vo DEFORM. i vi

nhng loi vt liu ph bin, th MM c sn trong th vin ca phn mm v ch vic chn v

a vo s dng. i vi mi loi vt liu mi, MM phi t xy dng v a vo nh l mt

iu kin bt buc. Th vin vt liu ca phn mm c trnh by nh hnh bn di

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Thng tin v vt liu

3. Chia li cho cc i tng trong DEFORM (Meshing)

Sau khi nhp cc i tng vo trong DEFORM cn chia li hu hn cho cc i tng y.

Tc l chia i tng ln thnh cc phn t nh (element) vi s lng hu hn. S phn t ca

mt i tng nh hng rt nhiu n chnh xc ca bi ton v thi gian gii. Do ty

vo tng bi ton, v tr ca tng vng trn i tng... m ly s phn t cho ph hp (ci ny

ty thuc vo kinh nghim v trc quan ca ngi dng).

Phn t y c nhiu dng nhng thng thng ph bin loi phn t khi su mt

(hexahedral) v khi bn mt (Tetrahedral).

4. iu kin bin

y l cc iu kin gia cng to hnh vt liu, x l nhit cho vt liu... nh ma st, iu

kin cng ngh (lc, tc bin dng, t dng c...), iu kin nhit... t vo bi ton sao

cho gn vi thc t nht.

Cc bi ton khc nhau s c iu kin bin khc nhau.

y cng l bc rt quan trng trong bi ton m phng v ngi lm phi hiu bit, nm r

c cng ngh mi t c iu kin bin chnh xc.

5. Gii bi ton

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Sau khi thc hin xong cc phn tin x l (pre-processor) 1-2-3-4, cn phi xut ra mt file

lm u vo cho phn mm t gii.

Thi gian gii bi ton c th ch my pht, c th my gi, c th c tun hoc lu hn ph

thuc vo s lng phn t, quy m bi ton, phn cng ca my tnh.

( gim thiu thi gian gii v ti nguyn ca my tnh cho vic gii bi ton ngi ta

xy dng cc phn mm ti u vic chia li, theo nhng vng c coi l quan trng s

chia li dy hn nhng vng km quan trng).

6. Kim tra kt qu

Sau khi gii xong bi ton, phn hu x l (Post-Processor) l kim tra kt qu. Nu tt c cc

bc 1-2-4 chnh xc m kt qu xa vi thc t th do vn chia li qu th, do cn chia

li li v gii li.

a. Bt u 1 bi ton.

Vo file, chn new problem

Nhn Next tip tc v la chn nh hnh di

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Tip tc nhn Next v chn tn bi ton ca mnh( v d chn l A1) sau nhn Finish.

Giao din mn hnh c dng nh sau:

Nhp vo biu tng nh pha trn bn phi, cnh biu tng -Z tip tc

Khi simulation controls xut hin chn nh hnh bn di

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Cc bn cng c th chn h n v l SI.

Tip tc chn Step ci t s bc thc hin

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b. Nhp hnh dng ca phi v dng c.

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Trn operation c sn workpiece du + nh ngay pha di add thm chy p v

khun p, c th thay i tn cho dng c hoc phi ti object name

Tip tc nhn vo work piece, nhn vo Geometry ti hnh dng ca phi, nhn vo

import geometry chn vo th mc deform/v 6_1/Labs chn hnh dng theo tn ca chng

di dng ui STL, v d ta nhn chn Tool_wear_lab1_workpiece cho Workpiece. Tng t

cho Top Die v Bottom die.

c. Chia li.

Nhn vo Mesh v chn Workpiece, chn nh hnh bn di:

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Nhn generate Mesh kim tra (xc nhn).Tng t vi Topdie.

d. Xc nh vt liu.

Chn General, chn vo phi v chn vo biu tng khi hp nh pha di (bn cnh

Temperature) v ti vt liu cho phi l AISI 1035(1650-2200F) (sau khi nhp vo steel)

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Tng t chn cho chy p l AISI H_13(sau khi chn Die material)

e. Xc nh nhit ban u

Nhn Assign temperature t ch nhit chn nhit cho phi l 1700F, chy l 68F.

f. Xc nh i xng hnh hc

Vo li Geometry v chn vo Symmetry Surface.

La chn cc mt i xng v nhn vo biu tng Add

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Thao tc ny ch p dng cho Bottom Die thi v n khng c chia li.

Cn phi v chy p c ly i xng bng vic nhn vo work piece v chn Bdry.cnd nhp

mt i xng v chn biu tng c du + .

Tng t cho chy p.

g. Truyn nhit

Chn vo phi , chn tip Bdry.cnd, nhn vo Heat exchange , chn mt truyn nhit v nhn +

Tng t vi chy p.

h. Quan h gia cc i tngTrang 14

La chn biu tng c hai hnh hp nh (pha trn)

V nhn yes s xut hin mt hp thoi

Vo edit sa li nh hnh di y :

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Sau nhn Close, nhn Apply to other relation, nhn Generate All

Cc quan h ma st s c sng cc bin ca phi v chy

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i. Xc nh cng cho vt liu

Chn topdie v nhn vo Advanced, chn Elemen data, chn hardness thay 0 bng 55

j. Xc nh chuyn ng ca chy.

Chn Top die v nhn vo Movement v la chn nh hnh bn di:

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k. Tng hp u vo v chy m phng

Nhn biu tng nh mu xanh pha trn cng tng hp u vo, nhn check

V Generate. Nhn OK. Nhn biu tng mu nu pha trn exit khi pre processor.

l. Chy m phng v ly kt qu

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Sau khi exit giao din mn hnh s xut hin file A1.DB. Nhn vo Run chy m phng.

Mt vi kt qu thu c

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