giao trinh catia v5 r16 - vtech - bai 5 assembly
TRANSCRIPT
Trung tm o to v ng dng cng ngh VTech 2009TO BN V LP ASSEMBLY
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Trung tm o to v ng dng cng ngh VTech 2009
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Trung tm o to v ng dng cng ngh VTech 2009
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Cng c Define Multi-Instantiation
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Trung tm o to v ng dng cng ngh VTech 2009
Cng tng t nh lnh Rectangle Pattern trong phn Part Design, Cng c Dm dng to cc i tng bng cch copy mt i tng theo mt phng xc nh. _ Click vo Multi-Instantiation Instantate xut hin. trn thanh cng c. Hoc vo Insert > Dm. Hp thoi Multi
Nhp cc thng s cho hp thoi : - Component to Instantiate : Chn i tng thc hin lnh. - Prameters: Chn kiu nhp thng s. + Instance(s) & Spacing: Nhp s i tng v khong cch gia cc i tng (1).
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Trung tm o to v ng dng cng ngh VTech 2009+ Instance(s) & Length: Nhp s i tng v khong chiu di t i tng gc n i tng cui (2). + Spacing & Length: Nhp khong cch gia cc i tng v chiu di t i tng gc n i tng cui (3). New Instance(s): S lng cc i tng cn to mi. S dng ny khi kiu nhp thng s l kiu (1) hoc kiu (2). - Spacing: Khong cch gia cc i tng. S dng ny khi kiu nhp thng s l kiu (1) hoc kiu (3). - Length: Chiu di t i tng gc n i tng cui. S dng ny khi kiu nhp thng s l kiu (2) hoc kiu (3). - Axis: Chn mt trc ta lm hng to cc i tng mi. - OR Select Element: Chn mt ng thng lm hng to i tng mi. - Reverse: o ngc hng va chn. - Result: Hp thoi thng bo vector n v ca phong to i tng. V d nu phng to i tng l X th vector n v to i tng l: (1, 0, 0). Nu phng to i tng l Y th gi tr ca vc t to i tng l: (0, 1, 0) vvTa c th nhp phng to i tng vo ny. - Define As Default: Gi li cc thng s thc hin lnh Fast Multi- Istantiation. Ch : Mi ln Click vo Apply l mt ln thc hin lnh nhng hp thoi vn m cho php ta thc hin tip cc lnh khc.3/ Cng c Fast Multi-Instantiation
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Sau khi thc hin lnh Dm v la chn Define As Default, Click vo Fast MultiInstantiation trn thanh cng c. Hoc vo Insert > Fast Multi-Instance. Sau chn i tng cn thc hin lnh th ngay lp tc cc i tng mi c to thnh theo cc thng s ca lnh Dm va thc hin. C. Cc rng buc (Constraints) trong Assembly Design Workbench. Trong mt bn v Assembly, cc rng buc c s dng sp t cc chi tit v ng v tr ca n trong bn v, cng nh t mi quan h v tr gia cc chi tit.Mt s l-u khi s dng contraints
_ Chng ta ch c th t Constraints gia hai i tng con ca mt i tng ang lm vic (Active Component). Mt Active Component s c mu xanh lc trn Specification Tree. Ch : kch hoi mt i tng thnh i tng lm vic ta Double Click ln i tng .
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Trung tm o to v ng dng cng ngh VTech 2009
_ Khng th t rng buc gia cc thnh phn ca cng mt i tng. _ Khng th t rng buc gia cc nhm chi tit con trong cng mt nhm chi tit nu nhm chi tit khng phi l i tng ang lm vic. V d: Trn hnh v di y ta c th thy i tng ang lm vic l Product B.
(1). Cc i tng khng thuc cng mt i tng lm vic do khng th t rng buc. (2). Cc i tng thuc cng mt nhm chi tit nhng nhm chi tit khng phi l nhm chi tit ang lm vic. (3). Product C v Product D l i tng con ca Product B l i tung ang lm vic do c th t rng buc.
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Trung tm o to v ng dng cng ngh VTech 2009
_ Cc biu tng ca cc rng buc: Constraints Symbol used Symbol displayed
in the geometry area in the specification tree Coincidence
Contact Contact (point) Contact (line)
Offset
Angle Planar Angle
Parallelism
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Trung tm o to v ng dng cng ngh VTech 2009
Perpendicularity
Fix
Rng buc cc i t-ng trng nhau ( Coincidence Constraint ) trn thanh cng c. Hoc vo Insert > Coincidence. Sau chn hai i tng cn t rng buc. Hp thoi Constraints Properties xut hin.
(_ Click vo Coincidence Constraint
_ Nhp cc thng s cho hp thoi: - Name: t tn cho rng buc nu ta khng t th chng trnh s t t tn cho rng buc. -Supporting Elements: Thng bo cc i tng va c chn t rng buc. - Reconect: Chn li cc i tng t rng buc. Mun chn li i tng t rng buc ta Click vo i tng trong Supporting Elements ri Click vo Reconect sau chn i tng mi.
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Trung tm o to v ng dng cng ngh VTech 2009Orientation: Chn hng rng buc cho cc i tng: + Undefine: Khng xc nh hng. + Same: Cng mt hng. + Opposite: Ngc hng nhau. _ Click vo OK kt thc. Sau khi thc hin rng buc th rng buc va to xut hin trn Specification Tree.Rng buc cc i t-ng tip xc vi nhau ( Contact Constraint )
Contact Constraint dng t cc i tng tip xc vi nhau.
_ Click vo Contact Constraint trn thanh cng c. Hoc vo Insert > Contact. Sau chn hai i tng cn t rng buc. Contact Constraint c thc hin v xut hin trn Specification Tree, biu tng Contact Constraint xut hin trn mn hnh.Rng buc khong cch gia 2 i t-ng ( Offset Constraint )
Offset Constraint dng t rng buc v khong cch gia hai i tng. Click vo Contact Constraint trn thanh cng c. Hoc vo Insert > Contact. Sau chn hai i tng cn t rng buc. Hp thoi Constraints Properties xut hin.
Nhp cc thng s cho hp thoi: Ging nh vi lnh Coincidence.
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Trung tm o to v ng dng cng ngh VTech 2009Rng buc gc gia 2 i t-ng song song hoc vung gc vi nhau ( Angle Constraint )
Angle Constraint dng o gc gia hai i tng, t hai i tng song song vi nhau hoc t hi i tng vung gc vi nhau. Click vo Angle Constraint trn thanh cng c. Hoc vo Insert > Angle. Sau chn hai i tng cn t Constraints. Hp thoi Constraints Properties xut hin.
Nhp cc thng s cho hp thoi: - Chn kiu rng buc: + Perpendicularity: t cc i tng vung gc vi nhau. + Prallelism: t cc i tng song song vi nhau. +Angle: t cc i tng to vi nhau mt gc no . Sector: Chn v tr t gc, c 4 v tr t gc c th la chn:
- Angle: Nhp gi tr gc gia hai i tng. - OK: Kt thc Angle Constraint v ng hp thoi.C nh v tr ca i t-ng trong khng gian ( Fix )
Fix dng t c nh v tr mt i tng trong khng gian bn v.
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Trung tm o to v ng dng cng ngh VTech 2009Click vo Fix trn thanh cng c. Hoc vo Insert > Fix. Sau chn i tng cn c nh. Sau khi chn i tng mt biu tng hnh ci neo mu xanh xut hin chng t i tng c c nh trong khng gian bn v. Ch : Khi double-Click vo Fix va to, hp thoi Constraints Definition xut hin. Lick vo More hp thoi c dng nh sau.
B la chn Fix in space sau Click vo OK ng hp thoi, by gi lnh Fix b v hiu ha.C nh v tr tng oi ca 1 nhm i t-ng ( Fix Together )
Cng c Fix Together dng t mt nhm cc i tng c nh tng i vi nhau. Tc l v tr tng i ca cc i tng cng chu nh hng ca Fix Together l khng thay i nhng v tr ca c nhm c th thay i i vi cc i tng khng thuc nhm. Click vo Fix Together Together xut hin. trn thanh cng c. Hoc vo Insert > Fix Together. Hp thoi Fix
Chn cc i tng cn t rng buc, tn ca cc i tng s xut hin trong hp thoi.
loi b mt i tng khi hp thoi ta Click vo i tng trn mn hnh hoc trong hp thoi.
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Trung tm o to v ng dng cng ngh VTech 2009t nhanh rng buc gia cc i t-ng ( quick constraint )
Cng c Quick Constraint dng t nhanh rng buc gia cc i tng. Ty tng loi i tng khc nhau chng trnh s t t cc rng buc ph hp. Rng buc s c to ra theo th t u tin: Surface Contact, Angle, Coincidence, Offset, Perpendicularity. Click vo Quick Constraint trn thanh cng c. Hoc vo Insert > Quick Constraint. Sau chn cc i tng cn t rng buc, rng buc tng ng s c to ra. Ch : Th t u tin trn c th thay i: Vo Tool > Options. Trong hp thoi Options chn Mechanical Design > Assembly Design. Chn tab Constraints > Quick constraint.
Bin i mt contraint thnh mt contraint khc ( Change Contraint )
Cng c Change Constraint cho php thay i mt Constraint to thnh mt Constraint khc. Click vo Change Constraint trn thanh cng c. Sau Click vo Constraint cn thay i, hp thoi Change Type xut hin.\
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Trung tm o to v ng dng cng ngh VTech 2009
Trong hp thoi Change Type, ta chn loi Constraint ri Click vo OK thc hin s thay i.Khng kch hot hay kch hot mt constraint ( Deactive/Active )
Cc Constraint trng thi bnh thng lun c kch hot ngay sau khi n c to ra. Khi mt Constraint khi khng c kch hot th cc chc nng rng buc ca n s khng cn tc dng. V d: a Coicedence.21 v trng thi khng c kch hot, ta Click chut phi ln Coicedence.21 trn Specification Tree hoc trn mn hnh ha. T menu trng thi chn Coincedence.21 object > Deactivate.
Cc Constraint trng thi khng c kch hot s c biu tng Deactivate trn Specification Tree v c mu trng trn mn hnh ha. Mun kch hot li cc Constraint ta lm tng t nh trn v chnTm cc contraint ca i t-ng
Activate.
Mt i tng c th c nhiu Constraint khc nhau, bnh thng khi quan st trn bn v ta kh c th bit c mt i tng c nhng Constraint no. tm v chn cc Constraint ca i tng mt cch nhanh chng v d dng, v d tm cc Constraint ca CRIC_BRANCH1, ta Click chut phi ln CRIC_BRANCH1 trn Specification Tree, t menu trng thi chn CRIC_BRANCH1.1object > Component Constraints. Cc Constraint thuc CRIC_BRANCH1 s t ng sng ln trn Specification Tree.Cp nht 1 constraint ( Updating an Assembly )
Updating mt bn Assembly c ngha l a tt c cc i tng c trong bn v v ng v tr ca n theo cc rng buc t.
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Trung tm o to v ng dng cng ngh VTech 2009Mt Constraint cha c Update s c mu en trn mn hnh v c biu tng Update bn cnh tn ca n trn Specification Tree. Ta c th iu khin qu trnh Update ca bn v: Tool > Options. Trong hp thoi Options chn Mechanical Design > Assembly Design. Chn tab General > Update.
Update ton b bn Assembly ta Click vo Update trn thanh cng c, tc th ton b cc rng buc c trong bn v s c Update, a tt c cc i tng v ng v tr ca n. Update mt Constraint, ta Click chut phi ln Constraint , t menu trng thi chn *object > Update. Khi cc Constraint c Update n s c mu xanh trn mn hnh ha.Kim tra v thay i cc thuc tnh ca constraint
Click chut phi ln Constraint cn kim tra, chn Properties t menu trng thi. Hp thoi Properties xut hin.
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Trung tm o to v ng dng cng ngh VTech 2009
a. Constraint. Trong tab Constraint ta c th t li cc thng s ca Constraint. b.Mechanical. Tab Mechanical thng bo trng thi ca Constraint: Deactivate, Update, Unsolve. c.Graphic. Tab Graphic cho php ta t mu sc hin th ca Constraint v t mt s thuc tnh khc. d.Features. Thng bo tn ca Constraint, tn ngi to, thi gian to, thi gian ln chnh sa cui cng.
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