Huong Dan Su Dung ProE- Thiet Ke Khuon

8/6/2019 Huong Dan Su Dung ProE- Thiet Ke Khuon

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Bai tap ln: Thiet ke khuon mau - Khoa C Kh HSPKTVINH

Chng: 12

THIET KE KHUON (MOLD

DESIGN)1. Chuan

b chitietmauVechieccocnhaco kchthcnhtrenhnh ve,atten

ly_nhua

2. M file mi: thiet ke khuon

NewmanufacturingMoldgo ten khuon_duc_ly_nhuaChon Set Up thiet lap n v o la mm

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3. at chi tiet can lam khuon vao mat phangchuan.

Feature Mold AssemblyDatum Datum Plane Default xuathien 3 mat phang chuan DoneReturn.

Vi chiec coc nha nay, dohnh dang khong phc tap nen cothe bo tr 4 long khuon tren mokhuon uc e tang nang suatuc

Mold Model Reference PartLayout Create xuat hien hopthoai nh hnh ben.

Click bieu tng Open diReference Model chon file ly_nhuaOK.

Tiep theo Click chuot len Reference Model OriginCa sochi tiet coc nha xuat hien. Do cha co iem goc toa onen khong the chon Seclect ma chon Create Default etao mi.

Ch CSO xuat hien di Reference Model Origin.Tiep en Click chuot len Reference Part Layout Origin

CreateDefaultDone Tiep en Click chuot len

Rectangle trong nhom Layout, chon

lieu bo tr (Layout) la Rectanglebang cach click chuot vao nuttron xuat hien them ca soo xuong, khai bao so hang chitiet theo truc X, truc Y va khoangcach gia cac long khuon, choncach nh hng (Orientation) laX-Symmetric (oi xng qua truc X), chu y mat phang XY la

mat phang Datum 3 thang ng oi dien vi mat ta. ChonPreview, neu ket qua va y th OKDone Return, khong th

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chnh lai cac khoang tang. Ket qua mong muon nh hnhve.

4. Tao phoi cho khuon uc.Mold Model Create Workpiece nhap ten phoi

Protrusion Extrude ve mot hnh hop co kch thc360x450x200 oi xng va bao lay 4 chi tiet. ket qua nhhnh ve.

5. Thay oi kch thc long khuon theo he so co rutcua vat lieu nha

Chon Shrinkage t menu Mold, chon chiec coc, chon ByDimension Set/Reset All Dims xuat hien dong nhac: Enter

shrink ratio 'S' (Formula: 1 + S ) for all dimensions nhap gia tr0.05DoneDone Return.6. Tao ong rot nha vao khuon (Spure)Feature MoldAssembly Solid Cut RevoleSolid Done, chonDatum 2 lam

mat phang ve

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phac va ve Section nh hnh ve di bang lenh Line vaArc.

7. Tao ng dan nha chnh (Runner)Feature Mold

Assembly Runner nhapten Runner chon loaing dan co tiet dientron, nhap ng knh10 chon mat phang ve

la Datum3 OK DefaultDung lenh Line ve motng thang i qua 2iem 1 va 2 nh hnh ve,s dung Constraint laAligment e cho hai iemau mut cua ngdan nha ngang tam cua

coc nha.Chon Done Auto SelectConfirm...OK. Ket qua nh hnh ve

Muon chnh sa ng dan nha, tang kch thc cuachung len, ta lam cach sau:

Modify Assembly Feature Redefine Select query selectva chon ngdan nh. Trong

hop thoaiRunner, chonDefside va nhaplai gia tr 15OK

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8. Tao cac kenh dan nha con trc tiep dan nhavao tng long khuon

Cung tng

t nh tren,Feature MoldAssembly Runnernhap tenRunner_2 nh macnh chon loaing dan cotiet dien tron,

nhap ng knh10 chon matphang ve laDatum3 hoac sdung UsePrevous OK Default Chon 2ng Reference

va Dung lenh Line ve cac ng thang i qua 2 iem 1va 2 nhan chuot giava chon them iem 3 va4 nh hnh ve, S dungConstraint la Align e chong dan nha trungvi ng tam cua coc,kch thc chieu dai cua

ng dan cac ay coc10mm nh hnh ve DoneAuto Select ConfirmDoneOKKet qua

9. Tao cac ca vao nha (Gate), con goi la cuong.

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Cua vao (gate) la ni dan nha t ng dan (runner)en long khuon, no phai co that lai (co tiet dien nhodan) e de be

cuong lay sanpham sau nay.Feature Mold

Assembly Solid Cut Revole Done,chon mat phangve la Datum 3 Default

Ve mot centerline va mot hnhthang kn nh hnhve (au nho cach 2mm, au to tiep tuyen vi ngdan) Done OK 360

0 Done va cac bc quen thuoc

khacKet qua

phai nh hnh

ve tren . Tao 3cuong nhacon lai banglenh oixng: MoldModify MoldAssemblyFea

ture

Copy

Mirror DoneQuery selectchon cong vao , chon mat phang oi xng nh cac bana biet.

Ket qua nh hnh ve ben

10. Tao hai mat phan khuon e rut loi hai benBan hnh dung ket qua can phai at c nh hnh

ve di, cong viec tien hanh nh sau:

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Mold PartingSurface Createnhap ten side1,

Add RevolveDone va thc hiencac bc nhthng gap, chonmat phang ve laDatum3.

S dunglenh Geometry

ToolsUse edge eco ng 1 va 2, s dung lenh Line e ve ng 3.Chon goc quay 360DoneOKMat tron xoay tao ra.

Tng t, tiep tuc Add va lam nh tren e c mattron xoay th hai. Ket qua phai nh hnh ve di

Tiep en la ve them cac mat phang sau o Mergevi hai mat phang tron xoay va roi e tao thanh motmat phang kn thong nhat e co the tach c phan

ben hong cua khuon ra.

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2

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Ta thc hien nh sau: Tiep tuc chon Add ExtrudeDone Both SideChon mat phangve phac laDatum1 (theo cach

ve cua ban cothe la Datumkhac datum1), vesection nh hnh veben.

Khai baochieu dai cankeo ra la Upto

Pnt/Vtx va chonhai iem goc cuaphoi.

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Merge hai mat tron xoay va cac mat phang va taothanh mot mat duy nhat, sao cho ket qua nh hnh ve.

Sau khi comat phan khuonth nhat nh hnhve, ta tiep tuc taora mat phankhuon e tachloi th hai. Cach

lam hoan toantng t nh tren:Parting SurfaceAddnhap tenside2 quy trnhlam tng t nhtren. Ket quacuoi cung phai

co hai mat phankhuon the hien bang cac ng hai pha nh hnh vedi

11. Tao hai mat phan khuon tach oi than khuon iqua mat phang oi xng cua 4 chi tiet coc nha

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Mold Parting SurfaceCreate nhap ten la middle chon Add Flat Done e ve mat phan khuon la matphang chon mat phang ve la Datum3 (mat oi xng

cua khuon).e ve section, dung lenh Geometry Tools Use edge ecopy 4 canh cua phoi (hoac dung lenh Rectange cungc) Done OK mat Flat tao ra tren man hnh bang 4ng bien12. Chia phoi thanh cac na khuon.a) Tach loi th nhat (slide1)Mold Volume SplitTwo VolumesAllwrkpcsDonemay yeu

cau: Select parting surface for splitting the workpiece.

chonmat phan khuon side1 Done select chng trnh yeu cau:Enter mold volume name for the highlighted volume go tenvolume1 cho phan khuon mau vang, phan khuon nay sec tach tiep cac bc sau nay.

may tiep tuc yeu cau: Enter mold volume name for thehighlighted volume [Quit]go ten slide1 cho phan can tachra co mau xanh dong thong bao hoan thanh xuat hien:

SPLIT has been created successfullyb) Tach loi th nhat (slide2)Tiep tuc lam tng t Mold Volume Split e chia

Volume1 tren thanh 2 volume: at ten la Volme2 vaSlide2 e tach loi th hai ra giong nh loi th nhat.c) Tach phan con lai cua khuon lam oi thanh 2 nakhuon tren va di (Top& Bottom)

Mold Volume SplitTwo VolumesAllwrkpcsDonemay

yeu cau: Select parting surface for splitting the workpiece.

chonmat phan khuon middleDone select chng trnh yeu cau:Enter mold volume name for the highlighted volume go tenTop cho phan mau vang chng trnh yeu cau: Enter moldvolume name for the highlighted volume go ten Bottom chophan mau xanh.

Nh vay la ta a chia phoi ban au thanh cac nakhuon can thiet cho viec tach khuon

13. Tach khuon (Extract)

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Mold Mold Component Extract Ca so Creat MoldComponent xuat hien chon tat ca cac Volume OKDoneReturn

14. Kiem tra goc thoat khuonKhi thiet ke vat uc cung nh khuon uc, can phaiam bao goc thoatkhuon, co ngha lacan phai co motgoc nghieng nho ecac tam khuon dedang lap ghep vi

nhau trong qua trnhong mo khuon valay san pham ra makhong b ket.

Mold DrafCheck Both Side Full Color Done chon mat phang mahng thoat khuon vuong goc vi mat o Nhap goc

thoat khuon la 50 chon phan khuon can kiem tra goc

thoat (v du chon phan khuon side1). Ket qua nh hnh ben,nhng mat co goc thoat khuon khac nhau se co cac

mau khac nhau.Neu muon kiem tra cac na khuon khac, chon

Continue va lam tng t nh tren

14. M khuonMold Mold Opening

Define Step Define MoveChon phan khuon slide1may yeu cau chonhng m: Selectdirection to explode byselecting edge, axis or face. pick vao mot canhcua phoi theo hng

can dch chuyen phankhuon o, chu y chieumui ten mau o va

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nhap gia tr dch chuyen khi m khuon la 200 hoac -200 Done.

Thc hien tng t cho phan khuon Slide2 vi khoang

dch chuyen 200, phan khuon Top va Bottom vi o dichchuyen cung la 200.Ket qua nh hnh ve

15. Giau cac phan t phu trNh tren hnh ve minh hoa m khuon noi tren ta thay

hnh khong ro rang v b che khuat bi phoi, chi tiet cocva cac mat phan khuon. e an cac mat nay ta thchien nh sau:

- Giau chi tiet: Mold ModelBlankReference Modelchoncac coc nhaDone select

- Giau phoi: Mold ModelBlankWorkpieceDone- Giau mat phan khuon: Parting SurfBlank chon tat

ca cac mat phan khuon Done Return16. Mo phongqua trnh mkhuon

Thc hienlai qua trnhm khuon(Mold Opening),ket qua nhhnh ve

e khuonlan lt mtheo cac bctuan t, tadung lenh MoldOpeningExplode va lan lt nhan phm Enter .

16. Tao vat uc

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Vat uc va ca he thong ong dan i kem giong nhluc ay san pham ra se c tao ra bang lenh MoldingCreateNhap ten san phamKet qua

S dung lenh m khuon ta se thay luon ca chumsan pham nh hnh ve di

18. Chnh ly khuon.Ta hoan toan co the thay oi va chnh sa lai mat

phan khuon va thembt hay thay oi hnhdang cua chi tiet tham

chieu (Reference Model)bang lenh Mold

ModifyRef ModelMuon thay oi hay

chnh sa mat phankhuong ta dung lenhParting SurfaceModify neumuon xoa hay them bt,

Redefine neu muon nhngha lai

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Muon cap nhap lai cac thay oi cho cac bo phankhuon va cac tam khuon ta phai dung lenh Regenerate19. Thiet ke cac chi tiet phu tr

a) ng nc lam mat (Water Line)FeatureMold AssemblyWater Linemay yeu cau nhaptenchap nhan WATERLINE_1, nhap ng knh ng dannc lam mat (v du nhap 10) la chon mat phang vephac chon Make Datum Offset Chon Datum 3 la matphang trung vi mat phan khuon Middle, EnterValuenhap gia tr la 80 Done Chon hai ng referenceva s dung lenh line e ve ng tam cua ng nc

lam mat nh hnh ve

Done

Auto Select

Done

OK, ketqua nh hnh ve pha trcThc hien tng t e co c ng lam mat cho

tam con laib) Lo chot ay san pham (Ejector Pin Holes)Feature Mold Assembly EJ Pin Hone Linear Done chon

mat phang ve phac la Datum 2 e tao hai lo chot aytai cac ng dan nha. V ly do tham my cho san pham,

khong the ay san pham tai ngay phan than coc nhama ta ay ng dan nha va no se loi san pham raluon (oi vi bo khuon nay)

Cac thc hien lenh giong hoan toan lenh Hole, ta cothe ve them lo chot ay tren tam khuon sau khi aExtract giong nh phan ve file *.prt ma khong can phaithc hien ay kha roi ram ve hnh ve.

c) Lo chot dan hng

Se c thc hien bang lenh tao lo thong thng nhtrong phan ve Modeling

ProE2000i khong ho tr th vien chuan cho cac chi tiet phukhac cua mot bo khuon hoan chnh nh cac tam e,tam gi va khong t ong xay dng ban ve lap rapcac bo phan phu khac (Mold Componets) thanh mot bokhuon hoan chnh theo cac tieu chuan cua cac nha sanxuat khuon mau nh HASSCO, FUTABA, MITSHUMI , ay lamot han che cua ProE2000i trong phan thiet ke khuon vano c bo sung trong ProE20001. Tuy nhien bo phan quan

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trong nhat cua khuon uc la long khuon a c hoanthanh ay u nh cac lenh ma ProE cung cap. Cac chitiet phu tr khac la cac chi tiet tieu chuan nen de dang

mua, che tao va co the s dung chung cho nhieu khuonkhac nhau.

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PHNG PHAP PHAN KHUONBANG TAO MOLD VOLUME TRC TIEP

Ngoai viec phan khuon bang cac mat phan khuon

e tach phoi ra thanh cac long khuon th ta cung co thetach khuon bang cach tao trc tiep cac Volume, sau otach cac volume nay ra. Sau ay la mot v du kha ienhnh cho phng phap nay ve viec phan khuon cho vo mochiec ien thoai di ong mo hnh a ve phan Modelingtrong cac bai hoc trc.

1. at chi tiet vao he thongMold Model Assemble Ref Modelm file vo ien thoai

di ong2. Tao phoiMold Model CreateWorkpiece go ten phoi S dung

lenh Protrusion Extrude e ve mot hnh hop co kch thc180x80x60 bao can oi chi tiet.

3. Chon he so co rutShrinkage By Dimension Set/ResetAll Dims nhap

0.003Done/Return.4. Tao cac Mold VolumeMold Volume Create nhap ten volume la core (tam

c), Gather anh dau check vao cac o select, fill, closeneu no cha c chonDone SurfacesDone Kien nhanchon tat ca cac mat pha trong cua vo ien thoaiDone

Done Ref

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May yeu cau: Specify surface to exclude all its inner

contours. Co ngha la chon cac mat e bo cac lo thong

(bao gom mat cha nut bam , mat cha man hnh va

mat co lo anten) au tien chon All va chon mat cha

cac lo nut bam, tuy nhien theo cach ve cua vo ien

thoai nay th co mot hang nut bam va lo man hnh

khong thuoc cung mot mat phang nen cac lo nay

khong b lap c mot cach t ong ma ta phai ch rang bien kn cua chung bang cach chon tuy chon

Loops trong menu Gather Fill Done select Done Ref

DoneReturn.

Menu Closure xuat

hien dung e khai bao

be mat phang ma cac

mat chung ta a chon

se un en mat nay

e tao thanh khoi ran

(Mold volume) chon tuy

chon All Loops Done

chon mat tren cua

phoiDone Return Show VolumeKet qua nh hnh vee hoan thanh phan loi core cua khuon ta can

them vao mot volume khac na theo ng phan khuonla vien lap ghep cua ien thoai.

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Hang locan lap

thu congLo manhnh canlap thu

cong

Matcha lonut bam

Matcha loman hnh


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SketchAdd ExtrudeSolidOnesideDone chon mat

hong cua phoi lam mat phang ve phac. Ve section bang

lenh Use Edge cua Geometry Tools chon cac canh doc theo

mep lap ghep cua ien thoai va s dung them lenh Lineva Trim e hoan thanh section kn nh hnh ve

Chon chieu sau can un la Upto Surface chon mathong oi dien vi mat a ve Sketch cua phoiKet qua

la khoi Volume va tao cong vi khoi volume a tao banglenh Gather hp lai vi nhau thanh mot khoi nh hnh ve.(s dung lenh Shade trong menu Mold volume e co hnhnay)

e co phan th hai cua khuon la tam cai (cavity), tas dung lenh Split e tach phoi ban au bang cach trphoi ban au cho tam khuon c (core).

Mold Volme Split One Volume All WorkpieceDoneChon mat phan khuon la Volume core Done selectmay hoi: Check mark islands to be included in the volume.

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Va ong thi menu Isalnd List hien ra, rechuot len cac Island1, 2 va 3,ta se phathien ra au la Island can thiet (co mau

xanh l)

chon Island o bang cach anhdau check va no Done select Nhap ten

cho Volune la

cavity_tam_thoiKet qua. Dung lenh Shade va chonvolume cavity_tam_thoi, ket qua nh hnh ve di

Do phan anten nam sau ben trong cua tam khuoncavity tam thi va roi nen can phai tach phan an tennay ra ta s dung them mot Mold volune na cho phanan ten nay.

Trc het can giau cac volume va tao cho ro hnh:

Mold VolumeBlankchon hai volume a taoTao them Volume th 3 ni an ten: Chon Mold Volume

Create nhap ten volume la Slide Sketch Extrude DoneOne Side Done chon mat phang ve la mat phang cuaphoi oi dien vi anten, ve section la mot hnh vuong11x10 nh hnh ve (chu y canh tren cua hnh ch nhattrung hoac cao hn mep tren cua mat lap ghep cuaien thoai tai cho an ten)

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Chon chieu sau un la Upto Surface chon mat au

cua ien thoai cho anten. Sau o dung lenh Trim e tr

bt i the tch cua phan

an ten. Ket qua nh hnh ve:

Trong o volume Slide co dang nh sau:

Cho hien lai cac Volume va tach Volume Cavity tam thira (bo vung the tch)

Mold Volme Split One Volume Mold volumeDoneChon mat phan khuon la Volume

cavity_tam_thoi

Done selectmay yeu cau: Select parting surface for splittingselected mold volume. chon volume Slide Chon Island1 (tcla phan cavity con lai) tren menu Island List Done Selectnhap ten cho volume la Cavity. S dung lenh shade ketqua nh hnhve:

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Trch cacthanh phan cuakhuon: S dunglenh MoldComponentExtract chon 3thanh phan la

core, cavity, slideOK

M khuon:Mold OpeningDefine step DefineMove nh a lam cac bai trc(nh an i cac

volume, phoi vachi tiet). Ket qua nh hnh ve ben. (chu y: v du nay chatao vome cho phan rong pha trong anten).

Chu y: Phng phap tao Mold Volume bang lenh Gathercc ky hu hieu khi phan khuon co cac chi tiet co ratnhieu lo tren cac mat cong v cac lo nay c t onglap i ma khong can ta phai lap thu cong tng lo khimat phan khuon yeu cau phai kn e mi co the tach

khuon.KY THUAT TAO MAT PHAN KHUON DUNG

LENH SHADOWShadow (tao mat da vao bong theo mot hng chieu

anh sang) - ay la mot lenh cc ky hu hieu trong viectao mat phan khuon mot cach nhanh chong, tuy nhienkhong phai chi tiet nao cung co the phan khuon theophng phap nay. No thng ap dung cho khuon hai tamva can co yeu cau la mat hng anh sang e taong bien cua bong phai la mat nghieng hoac vuong

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chon be mat ma hng chiet se vuong goc vi be mato (ch mat tren cua phoi), xuat hien mui ten o chhng chieu va ban phai ch hng chieu theo hng

chieu gio thoi trong cach quat that. Ket qua nh hnh vetrang trc, ng Silhouette tao ra phai la mot ng lientuc va khep kn, khong co oan h cung nh cho tha.Co nh vay phng phap tao mat phan khuon bang lenhShadow mi thanh cong.

Tao mat phan khuon bang lenh Shadow:Parting Surface Create nhap ten bat ky Add

ShadowDoneChon mat tren cua phoi (la mat gan vi

pha trc cua canh quat)

ch hng chieu anh sang(neu cha ung hnghay dung Flip OKay)hop thoai Shadow Surfacexuat hien trong o conhieu thong so t chonkhong bat buoc Optionala c chon mat nh.

Hay chon ShutOff Plane(mat phang ma anh sang en o se dng lai va ongthi o cung la mat phang tham gia vao viec tachkhuon).

Define Make Datum Plane Offset chon mat tren

cua phoiEnter Value, nhap gia tr la -80 e cho Datum ha

thap xuong so vi mat tren cua phoi Done DoneReturn OK. Ket qua mat phan khuon tao ra nh hnh ve.

(co the khai bao goc thoat khuon nhng vi bai tap nayneu khai bao goc thoat khuon khac 0 se gay ra loi hnhhoc). Dung lenh Shade e quan sat mat phan khuon. Tathay rang Shadow se copy cac mat hng anh sang vathem cac mat keo dai, mat tach ngang e tao matphan khuon kn. Viec nay ta cung co the thc hien thucong thong qua cac v du cac bai pha sau.

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Tach khuon, trch khuon va m khuon:Thc hien nh thong thng cac bai trc. Ket qua

nh cac hnh ben di:

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Mat phan khuon tao ra khi dunglenh Shadow

Hnh ve nay a s dung them lenh Mesh trong Viewe minh hoa cho ro


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Hnh tren la ket qua sau khi tao mat phan khuonbang lenh Shadow

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M khuon (Mold Opening) va trch khuonthanh hai tam


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KY THUAT TAO MAT PHAN KHUON DUNG LENHSKIRT

Skirt la lenh tao tao mat phan dang nh mot chiec

vay xoe rong gia. Skrit se om vao chi tiet tai ngbong (Silhouette), do vay lenh nay ch thc hien c khia tao ra ng bong trc nh a noi bai canh quat.

Vi bai tapcach quat, lenhSkirt thc hien khagiong nh lenhShadow nhng co

them bc chonng Silhouette,ket qua nh hnhve di e cacban hnh dung (nokhong kn gianh mat Shadow).Ket qua tren

khong giong chiecvay xoe cho lam v no a xoe ngangSau ay thc hien mot bai tap khac ien hnh cho

phng phap Skirt: phan khuon cho chiec mu a ve chng Basic Solid Modeling.

Cac bc can thiet ban au nh lap chi tiet, tao phoikhai bao o co rut cac ban t thc hien. Tiep en bcquan trong la:

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Tuy mat vay la rong gia nhng en ay ta co thephan khuon ngay c bi v trong qua trnh phan khuon,may se t ong cong them mat ben trong mu e tach

khuon.Tach khuon:Nh thng le, chon mat phan khuon la mat Skirt va

cac khai bao quen khuoc khac. Ket qua nh hnh ve:

Nh vay, ta thay rang phan khuon bang mat Skirt ratthch hp cho cac chi tiet co mat tiep giap gia hai tamkhuon la mot mat cong phc tap khong the thc hienc bang lenh Flat hay cac lenh khac, tuy nhien can

thiet phai co mot ng bong kn va khong qua phctap.oi vi chi tiet canh quat, ta cung co the dung

phng phap Skirt nhng goc Draf Angle phai la 00

va phaichon them ShutOff Plan.

Ky thuat tao mat phan khuon bang Copy vaMergecac mat

co san.Comot so

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chi tiet khong the thc hien phan khuon bang cac lenha hoc noi tren th ta phai s dung bien phap thu conge tao mat phan khuon. Thng gap chu yeu ay la

copy mat va tao them mot so mat mi sau o mergechung lai. Gia s can phan khuon cho chi tiet canh bmhng truc nh hnh ve.

Vi chi tiet tren ta khong the phan khuon t ongbang cac phng phap Shadow hay Skirt noi tren ma phaitao mat phan khuon theo kieu giong nh bai phankhuon cho 4 chiec coc. Tuy nhien ay s dung phng

phap Copy mat va tao them cac mat ket noi e taothanh mot mat phan khuon kn.

Vi v du tren, cach tao mat phan khuon gom cacbc chnh nh sau:

- Bc 1: Copy cac mat canh pha tren va mat trucua canh.

- Bc 2: ve them cac mat tai vung anh dau chA hnh ve tren bang lenh Surface AdvanvceBounderies. Dung lenh CopyMoveRotate e tao haimat tng t con lai.

- Tao mat mat phang tron pha tren bang lenhFlat e che kn lo va lien ket mat tru ngoai.

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- Tao mot mat Flat e cat ngang phoi- Tm cach merge cac mat noi tren lai vi nhau

thanh

motmat knvathongnhatnh hnhve

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Sau khi co mat phan khuon, tien hanh phan khuonthu c ket qua nh hnh ve. Cac bc chi tiet khong trnhbay ay, chu yeu ay la trnh bay phng phap v

ay la phan nang cao, cac lenh c ban xem nh a thanhthao.

Documents

Huong Dan Su Dung ProE- Thiet Ke Khuon