tổng quan về phần mềm catia

Tng quan v phn mm Catia

Trung Tm o To V ng Dng Cng Ngh VTech 2009

www.vtechco.org Page 1

tng quan v phn mm catia i/ gii thiu v phn mm catia:

Phan mem Catia la mot phan mem ho tr cho cong viec thiet ke cac chi tiet may cua ngi ky s thiet ke. Ngoai ra Catia con cung cap chc nang lap ghep cac chi tiet may ri rac thanh mot cum chi tiet, mot c cau may hay mot may c kh hoan chnh. Va sau o, ngi s dung phan mem Catia co the mo phong chuyen ong cua cum chi tiet, c cau hay may c kh a lap rap tren mot cach sinh ong. S chuyen oi gia cac moi trng lam viec trong Catia het sc linh hoat bang cach s dung thanh cong cu Start giup cho ngi thiet ke cam thay thoai mai va tiet kiem c nhieu thi gian. Vi nhng phan mem thiet ke c kh khac nh Pro/E, Solid Edge, Solid Word, e bat au lap rap cac chi tiet may a thiet ke cac ban can thc hien cac thao tac nh thoat file cua chi tiet ban ang thiet ke va tao mot file lap rap mi rat mat thi gian. oi vi Catia, ngay khi ban ang lam viec trong moi trng thiet ke chi tiet ma ban muon chuyen sang moi trng lap rap th ban ch viec chon thanh cong cu Start va sau o chon moi trng lap rap chi tiet la ban a thc hien bc tao file lap rap rat nhanh chong va linh hoat. Hoac khi muon mo phong chuyen ong cua c cau a lap rap ban cung ch viec thc hien thao tac tng t tren e vao moi trng mo phong chuyen ong. Ngoai ra cac ban co the cam thay c nhng chc nang, tnh nang thiet ke va mo phong cua Catia khi cac ban s dung no.1/ H-ng dn ci t phn mm catia: 1.1/ Cu hnh i hi ca my tnh : _ Phn cng my tnh ca bn phi chp nhn -c cc i hi sau y: Disk drive : 1 Disk drive bn trong hay bn ngoa ( dung l-ng ti thiu theo yu cu l 4GB ) uc i hi l-u tr ch-ng trnh thc hin, ch-ng trnh d liu, mi tr-ng s dng v khng gian trng. Ci t tt c cc sn phm ca phin bn CATIA 5 i hi 2.0 GB trn Windows v ci t tt c cc sn phm ca ENOVIA DMU i hi 700 MB trn Windows. B nh ( Memory ) : RAM 256 l dung l-ng ti thiu chp nhn -c ca b nh dnh cho tt c cc ng dng. RAM 512 l chp nhn -c cho ng dng ca DMU trn mt b phn ln. i hi c l s cao hn khi s l-ng d liu ln. _ V phn mm phin bn CATIA 5 chy -c trn : Windows 2000 Windows XP 1.2/ Ci t phn mm: _ Ci t ny ging nh- ci t ch-ng trnh bnh th-ng vi mt vi s khc bit nh. _ Tr-c tin, b a vo CD_ROM v ci t ging nh- cc kiu ci t bnh th-ng. _ Khi co dong nhac cac ban nhap cac yeu cau ( neu co ) cho qua trnh cai at phan mem.



_ Click Next . Hp thoi Setup Type xut hin

_ Click complete ci t tt c nhng phn mm.



_ Click nut Finish e ket thuc qua trnh cai at.2. Cach s dung chuot va cac phm tat : 2.1 Cach s dung chuot :_ Left-clicking ( click chuot trai ) : chon oi tng._ Holding left button ( gi chuot trai ) : cho phep ban keo oi tng._ Left-button double-click ( click nut trai chuot 2 lan lien tiep len oi tng ) : m hop thoai e hieu chnh cac thuoc tnh cua chi tiet._ Holding middle button ( gi nut gia chuot ) : kch hoat chc nang Pan._ Holding middle button + Right-clicking (gi nut gia chuot + click chuot phi) : kch hoat chc nang zoom, va sau o di chuyen chuot len xuong e phong to thu nho oi tng._ Holding middle button + Right button (gi nut gia chuot nut chuot phai) : kch hoat chc nang xoay oi tng._ Phm CRTL : co tac dung chon nhieu oi tng cung mot luc. 2.2 Cac phm tat :_ ESC : thoat khoi lenh hien hanh._ F1 : m chc nang tr giup cua phan mem CATIA._ SHIFT + F1 : m chc nang tr giup cho oi tng thanh cong cu,_ SHIFT + F2 : m tat chc nang xem tong quat specifitation tree._ F3 : hien hay an specifitation tree._ SHIFT + F3 : chuyen oi qua lai specifitation tree va gemeotric area._ ALT + F4 : thoat CATIA._ CRTL + F : kch hoat chc nang Search._ CRTL + C : sao chep oi tng._ ALT + E : hieu chnh oi tng._ ALT + F : m menu file t thanh cong cu chnh._ ALT + H : m menu help t thanh cong cu chnh._ ALT + I : m menu insert t thanh cong cu chnh._ CRTL + N : m file d lieu mi.ii/ TONG QUAN VE GIAO DIEN CUA CATIA :1/ Thanh menu : Bao gom cac menu nh :Start, File, Edit, View, Insert, Tools, Analyze, Window, Help.

- Start Menu : dung chuyen oi gia cac moi trng lam viec.- File Menu : bao gom nhng lenh New/Open/Save/Close/Print. No cung cha mot danh sach

cac file a dung trc o.- Edit Menu : bao gom cac lenh hieu chnh nh Cut/Copy/Paste va cac lenh khac nh Update.

Menu nay tng t nh danh sach so xuong.- View Menu : la menu quan trong gom tat ca cac cong cu va la chon, la chon ieu khien ( Manupulating ) nh Zoom, Pan va la chon Render.- Insert Menu : gom cac lenh dung e chen mot vat the hay mot chi tiet vao trong file.



- Tools Menu : la menu quan trong s dung e gan cac thuoc tnh cho moi trng lam viec cua Catia.

- Window Menu : dung e chuyen oi va quan sat cac file a m.- Help Menu : dung e m d lieu tr giup cua Catia.

2/ Specication Tree va vng v (Geometry Area) : _ Specification Tree

thun tin cho qu trnh thao tc v qun l cc sn phm trong bn v, CATIA cung cp cho ngi thit k Specification Tree. Specification Tree lu gi tt c cc sn phm cng nh cc lnh m ngi thit k dng to nn sn phm ca mnh, ta c th quan st thy Specification Tree pha trn bn tri ca mn hnh. tt hoc bt Specification Tree ta vo: View-> Specifications (Hoc n F3). + Bt ch Full Screen:View->Full Screen. + Thot khi Full Screen: Right Click ln mn hnh v hy chn Full Screen. Mun di chuyn Specification Tree ta xoay chut gia th cy th mc chuyn ng ln xung tng ng. Mun phng to, thu nh cy th mc ta nhn Ctrl + xoay chut gia.



_ Geometry Area: la vung o hoa pha di specifitation tree hay bao gom toan bo man hnh.

3/ Compass : CATIA cung cp 3D Compass cho php ngi dng c th thay i khung nhn v di chuyn cc vt th trong chng trnh. 3D Compass nm pha trn bn phi ca mn hnh.

Tc dng ca compass4/ Cac thanh cong cu va bieu tng ( Toolbars & Icons ) V tr cua cac thanh cong cu va bieu tng c ch tng ng tren hnh ve. Cac bieu tng c cha trong cac thanh cong cu, s dung e thc thi cac lenh ma ngi s dung muon thc hien. Tuy moi trng ma ban ang lam viec ma co cac thanh cong cu cha nhng bieu tng vi nhng chc nang khac nhau. Chung se c trnh bay cu the trong cac chng tiep theo. III / MOT SO THAO TAC C BAN 1/ To, m v l-u tr 1 d liu ( Creating, Opening, And Saving Documents )

1.1/ To 1 file mi to mt file mi trong CATIA ta c hai cch :_ Click vo biu tng trn thanh cng c. Hoc chn trn menu: File > NewSau khi thc hin lnh trn, chng trnh hin ln hp thoi New. Trong hp thoi New ta chn dng file cn to.

_ Trn Desktop ca Windows explorer click chut phi ln mn hnh v chn new t Contextualmenu (menu Ng cnh). Trong menu new chn dng file cn to. 1.2/ M 1 file d liu m mt file c sn ta c th dng cc cch sau:_ Click vo biu tng hoc chn trn menu: File -> Open.



Sau chn ng dn n file cn m._ Trn Windows Explorer ta Double-click vo file cn m._ Ko v th file: Khi chng trnh CATIA ang chy, ta c th ko v th mt file c sn ln chng trnh.

_ To mt file mi t mt file c sn (To file mi t file Newfrom.CATPart).

Trn menu chn: -File-> New fromTrong hp thoi File Selection chn ng dn v file cn chn.Khi to file mi t file c sn th file mi s cha ton b cc d liu ca file c. 1.3/ Lu gi file lu mt file ta c th c cc la chn sau:_ Lu File hin hnh, Click vo biu tng hoc trn menu chn:File->Save._ Lu File hin hnh di mt nh dng khc:File->Save As... Hp thoi Save as hin ra, trong hp thoi ta c th t tn v dng file cho sn phm._ Lu tt c cc file cha trong Product:File->Save All. 2/ Chon oi tng ( Select Objects ) Qu trnh thc hin cc lnh trong chng trnh i hi ngi s dng phi chn la mt hoc nhiu i tng cho mt lnh no . i tng c chn c th l cc khi, cc mt, cc ng, cc im, cc cnh, cc nh ca m hnh_ S dng chut kt hp vi Ctrl hoc Shift

+ Chn biu tng nu ch chn i tng cha c kch hot +Gi Ctrl chn nhiu i tng cng mt lc:

Trn vng thit kTrn Specification TreeTrn danh sch lit k trong hp thoi

+Gi Shift chn nhiu i tng cng mt lcTrn Specification TreeTrn danh sch lit k trong hp thoi

+ hy chn: Click bt c u trn nn mn hnh

_ S dng Selection Traps.

chn mt hay nhiu i tng, ta c th s dng Selection Traps. _ S dng ng bao Bounding Outline + Chn biu tng nu ch chn i tng cha c kch hot, + Dng chut tri ko-th (Drag-Release) to ng bao ph kn i tng cn chn_ The Intersecting Trap : Dng chut to mt Trap hnh ch nht. Tt c cc i tng giao nhau vi Trap s c chn.



_ Polygonal Trap : To nn mt Trap hnh a gic, ti c cc i tng nm hon ton trong Traps c chn._ Paint Stroke Selection . Dng chut to Trap l mt ng bt k, tt c cc i tng b ng Strocke i qua s c chn.

_ Other Selection... Command.( M file: Newfrom.CATPart). C hai cch thc hin lnh:+ Chn i tng, sau vo menu : Edit->Other Selection...+ Right Click ln i tng, chn Other Selection t context menu. Lu gi cc i tng cn Select (M file: SelectionSets.CATPart): _ Edit->Selection Sets Edition... Hp thoi Selection Sets Edition cho php:

+To mi (Create): Mun to mi mt Seclection Set ta click vo Create Set sau chn cc i tng cn to.

+Thm i tng (Add). Khi to mt Set, nu ch Add element c kch hot th cc i tng c chn s c thm vo Set.

+Bt i tng (Remove).Khi to mt Set, nu ch Remove element c kch hot th cc i tng c chn s b loi khi Set.

+Xa(Delete): Chn Selection Sets cn xa ri Click vo Delete Set.+Xa mt Set rng (Delete empty sets): Khi Cick vo Delete empty sets th tt c cc Set khng

cha i tng no s t ng b xa i._ Gi li cc i tng lu gi: Selection Sets (Ctrl+G) Sau khi to cc Set, ta c th gi li chng. Trn menu chn Edit->Selection Sets(Hoc n Ctrl+G). Hp thoi Selection Sets hin ra. Mun chn mt Set, ta click vo Set ri Click vo Select.3/ ieu khien oi tng ( Manipulating )_ Undoing Actions

hy b lnh va thc hin ta s dng lnh Undo. Click vo biu tng trn thanh cng c Standard hoc trn menu chn Edit->Undo Ta c th hy b mt s lnh va thc hin ch bng mt thao tc duy nht: + Click vo biu tng (Undo with history) trn thanh cng c Standard+ Trong hp thoi Undo with history ta chn cc lnh cn Undo ri Click vo Apply. OK._ Redo

Ngc li vi lnh Undo, ta c th thc hin lnh Redo khi phc li thao tc va hy b. - Click vo biu tng trn thanh cng c Standard hoc trn menu chn Edit->Undo - Click vo biu tng (Undo with history) trn thanh cng c Standard_ Cuting and Paste Object

Ta c th Cut v Paste cc i tng trong cng mt bn v hoc gia cc bn v khc nhau. Mun cut mt i tng ta Right Click ln i tng, chn cut (Ctrl+X).



Paste mt i tng ta Right Click ln v tr cn Paste ri chn Paste (Hoc Ctrl+V)._ Copying and Pasting Objects.

Cng tng t nh Cut v Pase, ta c th Copy v Paste i tng. Trong cng mt bn v hay gi cc bn v vi nhau.Mun Copy mt i tng ta Right Click ln i tng cn Copy ri chn copy hoc n Ctrl+C._ Paste Special... Command (m file: Pase special. CATProduct). Sau khi copy mt i tng ta c th paste i tng theo nhiu cch khc nhau. Right Cick ln v tr cn paste ri chn Paste Special. Hp thoi Paste Special hin ra cho ta mt s la chn: +As Specified in Part Document: i tng mi to thnh tn ti c lp vi i tng c, i tng mi c th thay i li cc thng s ban u. +AsResultWithLink: i tng mi lin kt vi i tng c, nu cc thng s ban u ca i tng c thay i s lm i tng mi thay i theo. +AsResult: i tng mi tn ti c lp vi i tng c, khng th thay i li cc thng s ban u ca i tng mi.

_ Xa mt i tng: Edit->Delete



Ch : khi xa mt i tng c cc children th chng trnh hin ln bng delete. Nu ta chn Deleteall children th tt c cc children ca i tng s b xa._ Measuring Objects

CATIA cho php kim tra nhanh kch thc ca mt i tng.G lnh c:Scale Planes vo command line.

Hp thoi Scale plane Properties cho php ta t kch thc ca li (Width, Height). t t l kch thc gia m hnh v kch thc li (Scale). Nu ta khng chn Show the grid li s n i.4/ Thc hien nhanh mot so lenh : thc hin mt lnh, thng thng chng ta Click vo lnh cn thc hin ri chn cc i tng thc hin lnh, hoc lm ngc li: chn i tng cn thc hin lnh ri chn lnh cn thc hin. Ngoi hai cch thng thng ny, CATIA cn cho php ta thc hin lnh bng cch Click vo icon ca lnh , gi chut ri th ln i tng cn thc hin lnh. Hoc click vo mt lnh thc hin trn i tng ri th ln i tng khc._ Dragging and Dropping Icons onto Objects

Chng hn mun thc hin lnh Fillet ta Click vo Fillet gi chut v th ln cnh ca hnh hp.

5/ Cac thao tac ieu khien the hien oi tng tren man hnh :_ S dng chut v bn phm zoom, pan, rotate khung nhn:


www.vtechco.org Page10

-Zoom: ->Ctrl+Pageup=Zoom in. ->Ctrl +Pagedown = Zoom out. ->Gi chut gia, n left mouse sau nh left mouse, di chuyn ln trn phng to (Zoom in), di chuyn xung di thu nh. -Pan: ->Ctrl+Arrow key. ->Gi chut gia v di chut. -Rotate: ->Shift + Arrow key. ->Gi chut gia + chut tri v di chut._ S dng menu v toolbar:Click vo Fit All In icon nhn ton b cc vt th c trong khung nhn.Click vo Pan icon di chuyn khung nhn.Click vo Zoom in icon phng to khung nhn.Click vo Zoom out icon thu nh khung nhn.Trn menu View->Zoom Area ri chn khung nhn zoom khung nhn va chn.

Click vo Normal View icon nhn vung gc vi mt mt phng chn.Click vo Rotate icon xoay khung nhn.6/ n v hin i t-ng : _ Right Click vo i tng sau t context menu chn Hide/Show icon



_ Sau khi thc hien th chi tiet c an va khong xuat hien tren hnh ve.



BI 2: v phC ( sketcher )Gii thiu cch xy dng cc bn v lp 3D phc tp theo 2 cch : t di ln v t trn xung.Xy dng t di ln: t cc bn v Part xy dng bn v Assembly. u im l n gin, d v

tng chi tit.Xy dng t trn xung l t khng gian v assembly chn thm i tng part vo. Nhc im:

bn v dung lng ln, gy dt my khi v gy ra kh khn. u im c th s dng kch thc ca cc chi tit khc trong qu trnh xy dng chi tit mi.

i/ gii thiu v phc v mI trung v phc: 1/ Gii thiu: To Sketcher l bc c bn u tin to m hnh. M hnh to thnh trong CATIA c lin kt vi bin dng ca chng. Khi hiu chnh bin dng, m hnh t ng cp nht nhng thay i ny. Ta lm vic trong mi trng v phc cn to ra hoc hiu chnh cc bin dng ca m hnh. Mi trng v phc bao gm cc mt phng v cc cng c v phc(Sketch Tools). Mt phng v phc cha cc bin dng ca vt th. N c th l cc Plane hoc l cc mt phng ca cc vt th c sn.

2/ Mi tr-ng v phc:



_ Click vo Sketch trn thanh cng c. Hoc t menu File chn :Start -> MechanicalDesign -> Sketcher.

Chn mt phng to Sketch trn mn hnh ho hoc trn Specification tree.Sketch workbench xut hin.

- Thit lp li bt im cho khng gian sketch: Bn vo insert / option / Mechanical Design / Sketcher Hp thoi xut hin nh hnh di. y bn c th thit lp cc thng s cho sketch.Chng ta quan tm n thng s Grid: Chn Display hin th li, khong cch Primary Spacing nh khong cch gia 2 mt li ln. Cn Graduations l s mt li nh trong 1 mt li ln

- u nhc im ca bt tt li, Khuyn co khng ln dng li



Cc toolbar chnh to sketch gm



2.1 Sketch Tools

Sketch tools dng nhp cc thng s cho i tng v v kch hot mt s chc nng iu khin:_Snap to point(1): Chc nng ny c kch hot mc nh, khi n c kch hot th con tr s t ng nhy n cc nt ca Grid khi chng ta di chuyn con tr trn mn hnh._Construction/ Standard Element (2): - Construction: Cc Construction l cc ng tm thi, thng c dng xy dng ln cc ng khc. Cc Contruction t ng n i sau khi thot khi Sketch.



- Standard: L cc ng c dng xy ng ln bn v Sketch, n vn cn lu li sau khi thot khi Sketch._Geometrical Constraints (3): Chc nng ny c kch hot s cho php chng ta truy bt t ng cc rng buc gia cc i tng hnh hc._Dimensional Constraints (4): Cho php t cc rng buc v kch thc._Cc thng s ca i tng v (5): Mun nhp cc thng s vo Sketch Tools ta c th dng phm Tab hoc dng con tr click vo tng ng.2.2 Profile

Bao gm cc lnh dng to ra cc i tng ng v khung dy trong mi trng 2D Sketch

2.2.1 Lnh Profile: To mt Profile bao gm cc i tng ng thng v cung trn. Bng cch

nhp vo biu tng lnh Profile hoc truy xut lnh bng trnh n Insert Profiles Profile.

- To mt Profile gm c ng thng v cung trn

- To bin dng c xc nh trc

- To ng trn v cung trn

- To bin dng 1 ng Spline, connect

- To cc ng c bit nh Elip, parabol, hyperbol,conic

- To mt on thng, ng thng, ng tip xc, ng phn gic..

- To i tng l mt im



Theo mc nh th biu tng trong lnh profile l to trc tin mt on thng. Click vo cc im lin tip trn mn hnh to Profile l cc ng thng lin tip.Khi to Profile, thanh cng c Sketch tools s xut hin thm cc la chn: Line, Tangent Arc,Three Point Arc. Click vo cc biu tng ca chng thc hin la chn. Bn c th thc hin chuyn i nhanh ng thng v ng trong bng cch l n vo im cui cng va v v r chut th chuyn ch t v ng thng sang cung trn

Double Click xc nh im cui ca Profle.2.2.2 Lnh to cc hnh dng Profile xc nh trc

Hnh ch nht nghing Hnh then Hnh l kha

Hnh ch nht Hnh bnh hnh Hnh xuyn Hnh lc gic

Lnh to hnh ch nht

Trn thanh cng c chn Rectangle . Thanh cng c Sketch tools s c dng nh hnh v:



Trn thanh Sketch tools ta c th nhp cc thng s cho hnh ch nht cn to. Sau Sketch tools s thay i sau mi bc thc hin lnh. S dng Sketch tools mt cch linh hot kt hp vi s dng con tr ta c th to c hnh ch nht theo nhiu cch khc nhau. Hnh ch nht to thnh c xc nh bng hai nh i din nhau.

Lnh ta hnh ch nht nghingMt hnh ch nht nging c xc nh bng 3 im.- Click vo Oriented rectangle trn thanh cng c.- Click vo mt v tr trn mn hnh xc nh nh th nht ca hnh ch nht.- Click vo v tr khc xc nh nh th hai.- Click mt v tr na trn mn hnh xc nh nh th ba.S dng Sketch tools ta c th nhp cc thng s: First corner, Second corner, Third coner, Width, Length, Angle.

Parallelogram (To hnh bnh hnh). to mt hnh bnh hnh chng ta cn xc nh 3 nh ca hnh bnh hnh.

- Click vo Prallelogram trn thanh cng c.- Click vo mt im trn mn hnh xc nh nh th nht ca hnh bnh hnh.- Click vo im khc xc nh nh th hai ca hnh bnh hnh.- Click vo im na xc nh nh th ba ca hnh bnh hnh.



S dng thanh cng c Sketch tools ta c th to hnh bnh hnh t cc thng s: First corner, Second

corner, Third coner, Width, Height, Angle.To hnh rnh then

To hnh xuyn

To hnh l kha



To hnh lc gic

Lnh to ng trn v cc cung trn



Circle (to ng trn).

- Click vo Circle trn thanh cng c.- Click vo mt im trn mn hnh xc nh tm ca ng trn.- Click vo mt im khc xc nh im nm trn ng trn.C th dng Sketch tools nhp cc thng s cho ng trn: Circle center, Point on circle, Radius.Three point circle (to ng trn bng cch nhp 3 im).- Click vo Three point circle trn thanh cng c.- Chn im th nht nm trn ng trn.- Chn im th hai nm trn ng trn.- Chn im th ba nm trn ng trn.

Circle using coordinate (to ng trn bng cch s dng hp thoi).Click vo Circle using coordinate trn thanh cng c. Hp thoi Circle Definition xut hin. Cng ging nh s dng Sketch tools, ta c th nhp cc thng s cho ng trn vo hp thoi.



Tri-tangent circle (To ng trn tip xc vi 3 i tng khc).- Click vo Tri-tangent circle trn thanh cng c.- Chn i tng tip xc th nht.- Chn i tng tip xc th hai.- Chn i tng tip xc th ba.

Arc (To cung trn).- Click vo Arc trn thanh cng c.- Chn im lm tm cung trn.



- Chn im u ca cung trn.

- Chn im cui ca cung trn.

Three point arc (To cung trn bng ba im nm trn cung trn).



Three point arc starting with limits (To cung trn bng 3 im, hai im u l gii hn ca cung trn).



To Spline 2D: Gm 2 tnh nng 2D Spline v connect cuver

Spline (v ng cong Spline).

- Click vo Spline trn thanh cng c.- Click vo cc im lin tip trn mn hnh to Spline.- Double Click xc nh im cui cng ca Spline.

Lnh to cc bin dng c bit



To Elip: Cch to ng Elip chn 3 im bt k to ra Elip theo nguyn tc im u tin s l tm ca Elip, im 2 xc nh bn knh ln ca Elip, im 3 xc nh ln ca bn knh nh. Ngoi ra cc bn cng c th nhp trc tip cc thng s ca Elip vo thanh Sketch Tools

To parabol Lnh ny cho php to ra bin dng c hnh Parabol, chn ln lt 4 im to ra ng Parabol nh hnh di y



To ng Hyperbol : Chn ln lt theo th t hnh di y cho 5 im to ra bin dng c hnh Hyperbol

To ng Conic chn ln lt 5 im theo hnh di y to c mt bin dng conic theo mong mun

Lnh to ng thng



To ng thng v tn : Dng lnh to ra nhng ng thng c chiu di v tn, c th to ra ng thng nm ngang hoc to ra ng thng ng hay bn c th to ra mt ng thng bt k vi chn la hai im hoc 1 im v mt gc.



To ng thng tip tuyn hai i tng : To mt ng thng tip tuyn vi hai i tng c sn, i tng ny c th l ng trn hay ng cong bt k.

To mt ng phn gic ca hai cnh cho trc : Lnh ny cho php bn to ra mt ng phn gic ca mt gc c to bi hai ng thng cho trc.



To ng tm



To im

To im trc tip Click chut vo mt im bt k trn vng ha to ra im mong mun. Hoc bn nhp thng s ta H,V trong thanh Sketch Tools



2.3 Cc thut ton s l bin dng



Cc tnh nng Tranfomation



2.4 Cc tnh nng trong 3D Geometry



2.5 Rng buc trong Sketch



Rng buc Geometry

Rng buc Dimension



Kim sot kch thc v rng buc trong Sketch



BAI TAP T LUYEN : Thc hien ve thiet ke 2D cac hnh cho di ay :