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Autodesk Inventor 11 Thit k chi tit

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Ch-ng 2

thit k chi titVic thit kchi tit -c thc hin theo cc b-c sau:1 - To ra cc hnh phc trn mt phng (2D Sketch) hoc trong khng gian 3 chiu (3D

Sketch) lm bin dng tohnh khi ca chi tit.2 - Dng cc cng c to hnh khi 3 chiu to ra cc chi tit t cc bin dng -c

to ra trong b-c 1.

3 - Tu sa thnh chi tit hon chnh.

2.1giao din mi tr-ng thit k chi tit2.1.1Thit lp ban u cho chi titDng lnh:

Trnh n: Tools Applycation Option PartGii thch:Hp thoi hin ra:

Mc Part - chi tit

Cc la chn gm: No New Sketch: khng m mt phng hnh phc khi to chi tit mi.

Th-ng mc nh khi to mt chi tit mi, lun xut hin mt phng XY vi cc l-i mnhnh km theo thanh cng c ng-i dng v phc bin dng (Sketch) dng cho vic to hnhkhi (hnh 1-a).

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Nu chn ph-ng n ny mt phng phc khng hin ra m ch hin ra khng gian chachi tit (hnh 1-b). Mun v hnh phc bin dng phi nhn nt chn Sketchtrn thanhcngc.

Hnh 1 - a

Hnh 1 - b

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Sketch on X-Y Plane:chn mtphng XY lm mt phng cha hnh phc u tin khi tochi tit mi (new part). y cng l mt phng mc nh nu khng chn No NewSketch.

Sketch on Y-Z Plane:chn mt phng YZ lm mt phng cha hnh phc u tin khi tochi tit mi (new part).

Sketch on X-Z Plane:chn mt phng XZ lm mt phng cha hnh phc u tin khi tochi tit mi (new part).

Opaque Surfaces: Mt dng hnh c mu c. Mc nh, mt mt dng hnh(constructions) th-ng trong sut (translucent) (hnh 2-a), nu chn ph-ng n ny,mt s c (hnh 2-b).

Hnh 2 - a Hnh 2b

Autohide in-line work feature: t ng n i t-ng khi n ha nhp vi hnh khi khc. Auto-consume Work Features and Surface Features:t ng dng cc i t-ng dng

hnh nh- mt phng lm vic khi to cc im hoc mt khn gian khi to cc i t-nghnh xon.

Nhn Apply kt thc thit lp hoc Closekt thc lnh.

2.1.2Thit lp cho mt phng cha hnh phcDng thit lp mt s ch phc v cho vic v phc cc hnh th. Lnh ny c th

tin hnh bt c lc no.Dng lnh:

Trnh n: Tools Application Options

Gii thch:Hp thoi hin ra, nhn chn mc Sketch.Trong hp thoi ny c cc nt chn sau:

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Nhm Constraint Placement Priority - cc rng buc di chuyn con tr khi v hnh-c -u tin

Parallel and Perpendicular: song song v vung gc.Vertical and Horizontal: thng ng v nm ngang.Ch -c chn mt trong hai nt ny. Cc la chn ny cho php khi v hoc chnh sa,

khi -a con tr n cc v tr thch ng, cc rng buc t hin ra thnh cc -ng chm chmdn dt con tr bm theo. Th-ng chn song song v vung gctin li v hiu qu.

Nhm Display - cho hin thGrid lines:l-i mn hnh. Nu ON c hin th -ng k m theo cc tham s t

ti Document Settings. OFF - khng hin th.

Minor grid lines: ON hin th -ng k m, OFF khng hin th.Axes: trc to (-ng k m nht chia mn hnh lm 4 phn). ON c hin th,OFF khng hin th.

Nhm OverConstrained Dimensions - kch th-c c th thay i cc rng bucCh -c chn mt trong hai ph-ng n sau:Apply Driven Dimension:cho php cc kch th-c thay i ln nhau. Nu mt kch

th-c cho ln ln th cc kch th-c ni tip vi n hoc c rng buc cng bthay i theo.

Warn of OverConstrained Dimensions:bo tr-c khi cho kch th-c th khngth cho cc rng buc.

i vi cc i t-ng ni tip nhau thnh mt hnh khp kn, khi cho kch th-c thmt s kch th-c khng th sa -c v b cc kch th-c khc khng ch. Cc rng buc

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(Constraint) cng khng ththc hin -c. Mun cho li cc rng buc cho mt i t-ng,phi xo kch th-c ca i t-ng ( t do).

Cc nt la chn khc

Snap to Grid:bt vo cc im nt(khong cch -c cho trong Snap Spacing). ONc cho bt im, OFF khng bt im. La chn ny cn c th -c t bt clc no bng cch -a contr vo tnSketchti vng trnh duyt hoc -a vomt i t-ng bt k, nhn phm phi chut, nhn chn Snap to Grid.

Edit dimension when created: cho thay i gi tr ngay lc ghi kch th-c. Hpthoi nhp s liu hin ra ngay sau khi kch th-c -c kch hot.

Autoproject edges during curve creation:t ng chiu cc cnh nhn thy ca chitit ln mt phng phc khi to cc i t-ng ca hnh phc mi.

Automatic reference edges for new sketch:t ng chiu cc cnh nhn thy cahnh khi ln mt phng phc khi to mt phng v phc mi.

Parallel View on New Sketch Creation: T ng xoay mt phng cha hnh phcthng h-ng nhn ca ng-i dng.

AutoBend width 3D Line Creation:t ng un cong khi on thng 3D -c v.Tham s to on cong -c ni ti hp thoi Document Settings trn.

Nhn Apply kt thc thit lp hoc Closekt thc lnh.

2.1.3Bt u vo vng lm vic to chi tit mi

2.1.3.1Lnh New - to bn thit k miDng lnh:

Trnh n: File New Standard.IPTThanh cng c:

Gii thch:Inventorlun cho chng ta cc bn v mu theo cc tiu chun th gii. Khi ra lnh, mt hp thoi xut hin chng ta chn bn mu km theo tiu chun.

Trong ny c cc tp tin mu theo cc loi tiu chun.Trong hp thoi ny c 3 mc l Default(mc nh), English(h Anh) v Metric(h

Mt). Hnh d-i l hp thoi cc tp tin mu Default(mc nh). Cc bn mu u c tn lStandard. Cn theo tiu chun k thut no, ph thuc v lnh Format -> Standard.

Tip sau l hai h o l-ng hay -c dng nht: English(h Anh). Cc tp tin mu cah Anh l ANSI n v l incher.

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V h Metric(h Mt):

Trong ny c cc bn v mu theo tiu chun ISO, DIN, BSI, JIS, GB, n v l milimt.Chn tp tin Standard.ipt, nhn OK.Mn hnh giao din to chi tit hin ra.a- Nu ti thit lp ban u Applycation Options -> Parts,khng chn No new

Sketch, chn hnh phc trn mt phng no th mn hnh giao din mi tr-ng hnhphc (Sketch) trn mt phng hin ray cc cng c cho chng ta thc hinbn v phc 2D (2D Sketch).

b-Nu chn No new Sketch, mn hnh l mi tr-ng to hnh khi. Mun v hnhphc bin dng phi nhn nt chn Sketchtrn thanh cng c.Nhn chn mt phng to hnh phc trn trnh duyt, mn hnh phc hin ra lmvic.

Trong mn hnh giao din lun c Thanh lnh (Panel bar),Trnh duyt (BrowseBar)v khng gian cha hnh khi hoc mt phng v hnh phc.

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2.1.3.2Khng gian cha chi titKhng gian cha chi tit l khng gian 3 c h trc to . Mi tn mu xanh l cy l trc Y,my l trc X, trc Z mu xanh thm.

Nhn thng gc vi mt phng XY t chiu d-ng ca trc Z.

Nhn t im X>0, Y>0, Z>0, thng vo gc to .

Chng ta c th v phc ti bt k mt phng no ca khng gian 3 chiu, th-ng mcnh l mt phng XY hoc chng ta chn mt phng v hnh phc ti lnh Tools Applycation Option Part (xem2.1.1). thay i mt phng v, nhn nt OrigintrongTrnh duyt:

Mt danh sch cc mt phng v trc to hin ra. Nhn chut chn, mt phng -cchn tr thnh mt phng v phc. Trong v d ny l mt YZ. Hnh v phc c th -c v trnhai mt phng khc nhau (hnh bn phi).

Cc thao tc v v chnh sa ca Inventor-c thc hin phn ln bng cc thanh cngc v nhy phm phi chut.

2.1.3.3Thanh lnh v thanh cng cKhi khi ng chuyn mc 2D SKETCH, trn mn hnh xut hin Thanh lnh 2D

Sketch(Panel Bar). Nu khng hin th, vo View -> Toolbar -> Panel Bar hin ththanh lnh hoc2D Sketch Panel hin th thanh cng c.

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Ngoi ra hin th Thanh cng c, nhn Tools trn Trnh n, nhn chnCustomize, hp thoi xut hin:

Chn mc Toolbars, chn 2D Sketch Paneltrong danh sch cc thanh cng c, nhnnt Show. Nhn Close ng hp thoi. Trn mn hnh s xut hin thanh cng c 2DSKETCH.

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2.1.3.4Trnh duytng thi xut hin vi Thanh lnh l Trnh duyt (Browse Bar)

Mc gc bao gi cng -c t tn lPartxx(part1,part2..). y chnh l tn tp chachi tit. Tip sau l n cc mc con. Mi ln chng ta to thm cc i t-ng li -c thmmt mc con v cc mc chu, cht v.v.... Cc mc con ny th-ng t tn mc nh nh-Sketch1, Sketch2, Extrude1, 2....Chng ta c th nhy p chut vo cc tn t tn theoqui -c ring d nh, d qun l hn.

Mun thao tc vi cc i t-ng, -a chut vo tn ca i t-ng trn trnh duyt vnhn phm phi, cc lnh thao tc (Trnh n ng) hin ra, nhn chut vo lnh cn thc hin.

2.1.3.5Lnh Save ngha:

L-u tr bn thit k.Dng lnh:

Trnh n: File SaveThanh cng c:

Gii thch:Lnh ny dng chung cho tt c cc loi bn v trong Inventor.Hp thoi xut hin:

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Ti File name: cho tn tp tin l-u tr. Phn m rng ca file ph thuc vo chng taang lm vic vi loi bn v no (xem phn cc tp tin ti Ch-ng 1). Trong ny l tp tin.IPT(tp tin v hnh khi chi tit 3D). Nhn Save l-u tr.

2.1.3.6Lnh Open ngha:

M bn thit k c.Dng lnh:

Trnh n: File Open

Thanh cng c:Gii thch:Lnh ny dng chung cho tt c cc loi bn v trong Inventor.Hp thoi xut hin:

Ti File name: cho tn tp tin l-u tr hoc chn trn danh sch cc tp tin. NhnOpen m tp ra lm vic.

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2.1.4 Cc lnh thao tc vi mn hnh2.1.4.1t mu cho mn hnh vMn hnh c th thay i mu bng lnh:

Tools Application Options ColorosHp thoi xut hin:

Chn cc mu trong Color Scheme, nhn Applykt thc cng vic, nhn OKhocg Enterkt thc lnh.

2.1.4.2Lnh Rotate ngha:

Xoay khng gian v theo mi gc .Dng lnh:

Trnh n: View RotateThanh cng c:Bn phm: F4

Gii thch:Khi thc hin lnh ny, mn hnh nh- sau:

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Khi con tr t vo bn trong vng trn n c dng , c th xoay theo mi h-ng.

Khi -a ra ngoi vng trn chun, con tr c dng xoay quanh trc vung gc

vi mn hnh.

Xoay hnh quanh trc thng ng.Nu nhn phm phi chut ti gia mn hnh, mt trnh n ng xut hin:

Chn Common View [Space bar],s -c mt khi khng gian iu chnh gcnhn theo cc h-ng nht nh. Nhn chut vo mi tn nh h-ng nhn (hnh d-i).

C th g thanh cch(Space bar) chuyn i gia hai ch xoay mn hnh. Nhnphm phi chut, chn Donehoc g ESC kt thc lnh.

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2.1.4.3Lnh Pan ngha:

Di chuyn mn hnh theo mi h-ng.

Dng lnh:Trnh n: View Pan

Thanh cng c:Bn phm: F2

Gii thch:

Sau khi ra lnh, con tr c dng , nhn v gi chut, di chuyn chut di chuynmn hnh.

2.1.4.4Lnh Look at ngha:-a i t-ng -c chn vo trung tm mn hnh v nhn thng gc vi mt phng cha

i t-ng.Dng lnh:

Trnh n: View Look atThanh cng c:

Gii thch:

Sau khi ra lnh, con tr c dng , -a con tr n i t-ng hoc mt ca hnh khicn chn, nhn chut. i t-ng -c -a vo tm mn hnh v h-ng nhn thng gc vi mtphng cha i t-ng hoc mt -c chn ca hnh khi.

2.1.4.5Lnh Zoom ngha:

Tng gim tm nhn.Dng lnh:

Trnh n: View ZoomThanh cng c:Bn phm: F3

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Gii thch:

Con tr c dng , nhn v gi chut, khi -a biu t-ng ra xa ng-i dng (ln trnmn hnh hay t tri qua phi) th hnh nh b thu nh li, ng-c li, hnh nh -c hin to ln

(ng-c li vi AutoCAD).

2.1.4.6Lnh Zoom Window ngha:

-a hnh nm trongca s do ng-i dng xc nh vo tm mn hnh vi tm nhn gnnht.Dng lnh:

Trnh n: View Zoom WindowThanh cng c:

Gii thch:Chn ca s bng cch v mt hnh ch nht qua hai im gc i nhau qua -ng cho.

2.1.4.7Lnh Zoom Select ngha:

Cho hin ton b mt i t-ng -c chn ln mn hnh. Dng lnh:

Trnh n: View Zoom Select

Thanh cng c:Gii thch:

C hai cch thc hinlnh:- -a con tr n i t-ng cn chn, nhn chut sau ra lnh.

- Ra lnh, con tr c dng , -a con tr n i t-ng, nhn chut.

2.1.4.8Lnh Zoom All ngha:

-a ton b hnh ca bn thit k vo mn hnh.

Dng lnh:Trnh n: View Zoom AllThanh cng c:

Gii thch:Sau khi ra lnh, tt c cc i t-ng -c -a vo mn hnh.

2.1.4.9Lnh Isometric View ngha:

Nhn theo hnh chiu trc o.

Dng lnh:Trnh n: View Isometric

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Gii thch:Sau khi ra lnh, tt c cc i t-ng -c -a vo mn hnh vi gc nhn hnh chiu trc

o.

2.1.4.10 Lnh Prevoius View v Next View ngha:

Prevoius View: Quay li mn hnh ca ln xem tr-c.Next View: Chuyn n mn hnh ca ln xem tip theo.

Dng lnh:Trnh n: View

Trnh n ng:

Gii thch:Khi ra lnh, mn hnh t ng chuyn v cc trng thi t-ng ng.

2.1.4.11 Cc nt chuyn i ch lm vicInventorc hai ch lm vic: ch Sketch(bn v phc) v ch BaseModel

(m hnh c s).Ch v phc (Sketch) v cc bin dng 2D ti cc mt phng bt k.Ch m hnh c s (Base Model) quan st v to cc khi 3D.

Nt chuyn i .Nhn nt Sketch thc hin cc cng vic v phc.Nhn nt Return sang ch hnh khi 3 chiu (Model) .

2.1.4.12Cc tr gip th-ng trc trong khi ang thc hin cngvic

Trong Inventorkhi cc lnh ang -c thc hin, nhn phm phi chut s hin ra mtTrnh n ngt-ng ng phc v cho la chn ph-ng n hoc cc b-c tip theo ca cngvic . Trnh n ngminh ho d-i y xut hin trong cc lnh v.

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2.1.4.13Kt thc mt lnhMt lnh trong Inventor -c thc hin mt cch ln tc cho n khi no ng-i dng ra

lnh kt thc bng cc cch sau:

- Nhn phm phi chut, Trnh n nghin ra, nhnDone.- Nhn phm ESC.

2.1.4.14Tr gip bt imTrong Inventorc s tr gip bt vo cc im c bit ca i t-ng nh- trung im,

im (Midpoint) u mt (End point) khi -a con tr n ln cn cc im ny.Ngoi cc ch dn dt n cc rng buc mt cch t ng nh- trn, Inventorcn

cho php khi v, c th nhn phi chut, chn bt vo cc im nh- sau: Midpoint bt vo trung im ca i t-ng.Center btvo tm -ng trn hoc cung trn.Intersection bt vo giao im ca cc i t-ng.-a con tr vo i t-ng th

nht, nhn phm tri sau -a con tr n i t-ng th hai, lp tcxut hin du hiu mt im, nhn phm tri s bt -c vo giaoim.

AutoProject t ng chiu cc cnh nhn thy ca hnh khi ln mt phng phc bt im. Tr-ng hp ny dng cho vic thc hin hnh phc khi c hnh khi.

2.1.4.15Tr gip h-ng dn s dngHow To....nhn nt ny s c cc ch dn bng ting Anh ca Inventor.

2.2Hnh phc 2D - 2D sketchsHnh khi ca chi tit -c to ra t cc bin dng 2D (2D Sketch) hoc 3d (3D

Sketch).Cc hnh ny -c v theo qui trnh v cc -ng nt c bn sau to ra cc rng buc

gia chng bng cc rng buc hnh hc (v tr gia chng vi nhau) v rng buc v kch th-c

-c mt bin dng chc chn khng b x lch.Trong mt phng v hnh phc, lun c l-i vung, khong cch gia cc -ng k-c xc nh trong lnh Tools Document Settings Sketchv n -c hin th haykhng ph thuc vo cc thit lp trong lnh Tools Application Options -> Sketch.Cth dng tr gip bt im vo cc nt l-i trong v hnh.

Bt u bn v chi tit mi, nu khng hin mt phng phc nhn nt Sketch, nhn contr vo mt phng XY ca bn v phc.

Cc cng vic v v chnh sa -c thc hin bng cc nt trn thanh cng c.

Cc nt Undo (b vic va lm)v Redo (khi phc li vic va b b)

cng nh- cc phn mm khc.

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2.2.1Cc thit lp tr gip cho bn v phcKhi thc hin vic to chi tit mi, cc thanh cng c thit lp tr gip hin ra..

Tr-c khi bt tay vo cng vic thit k, chng ta phi nh n v o di, n v o gc, chnh xc sau du phy thp phn, cch hin th cc yut cn thit ca bn v. Th-ng ccthit lp ny -c t mc nh theo tiu chun thit k m ta chn phn trn. Trong mc nychng ta nghin cu cc thit lp .

2.2.1.1 Lnh Document Settings ngha:

Thit lp n v, cc ch l-i mn hnh cho bn vphc.Dng lnh:

Trnh n: Tools Document SettingsGii thch:Hp thoi xut hin.

Trong ny c rt nhiu mc thit lp cc thng s ban u. Chng ta chnghin cucc thit lp lin quan n hnh phc - Sketch.

1- Mc Units - nh dng n v

Hp thoi:

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Trong c cc nt sau:

Nhm Units - t n v oLenght:chn n v o di. Nhn chut vo nt , mt danh sch cc n v o hinra: milimet, centimet incher... chn.Angle:n v o gc. Cch lm t-ng t nh- trn.Time:n v o thi gian.Mass:n v o khi l-ng.

Nhm Modeling Dimension Display - hin th kch th-c

Linear Dim Display Pecrision: chn chnh xc cho n v di. Nhn chut vo nt, mt danh sch cc chnh xc hin ra chn. Trong cc con s 12345....sau s0 l s ch s thp phn sau du phy.Angle Dim Display Precision:chn chnh xc cho n v o gc. Cch lm t-ng tnh- trn.Cho php chn mt trong cc nt sau hin th kch th-c:Display as Value: hin gi tr bng s. Display as Name: hin gi tr bng ch k hiu.Display as Expression: hin gi tr bng cng thc.Display tolerance: cho hin gi tr dung sai.Display precise value: cho hin gi tr chnh xc (khng c dung sai).Cc la chn ny cng t-ng -ng vi lnh Chn ph-ng thc hin th kch th-c

-c gii thiu ti phn rng buc v kch th-c. Sau khi chn xong nhnApply.

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2- Mc Sketch - nh l-i mn hnh

Trong c cc nt sau:

Nhm Snap Spacing - t khong cch bt imX: khong cch theo ph-ng X. G s.Y:khong cch theo ph-ng Y. G s. Cc s ny gip cho ng-i v bt im nhanh v

chnh xc.V d: X: 1mm, Y: 1mm nh- trn hnh hp thoi ngha l con tr bt dnh vo cc imcch nhau mi chiu 1mm, khng ph thuc vo l-i hin th cch nhau bao nhiu.

Nhm Grid Display - v l-iSnap Per Minor : khong cch gia cc -ng k m. n v l mm. Trong v d, c

2mm k mt -ng m. C th g s khc.Maijor evrry minor line:khong cch gia cc -ng k m tnh bng s -ng m.Trong v d, c sau 10 -ng m li k mt -ng r hn.

Nhm 3D Sketch - dng t ng to cc -ng un trong khng gian 3 chiuAuto Bend Radius: t ng un thnh cung trn nu on va v nh hn gi tr cho

trong nhp liu. Gi tr ny c th thay i bng s khc do ng-i dng g vo. Nhn OKkt thc lnh.

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3- Mc Modeling - nh bt im trong khng gian 3 chiu

Trong ny ccc nhp s liu:Distance Snap: khong cch c th bt im. G s.Angle Snap: gc ln cn bt im. G s.Nhn OK kt thc lnh.

2.2.2Cc lnh v, chnh sa hnh phc - Sketch2.2.2.1Lnh v on thng - LineDng lnh:

Thanh lnh:Bn phm: g L

Gii thch:Khi ra lnh, con tr tr thnh mt chm mu c ch thp. Nhn vo im nh v ko

n im th hai s -c mt on thng. C tip tc s -c -ng gy khc. Khi no imcui ca mt on mi v dnh vo mt i t-ng khc coi nh- mt i t-ng -c to ra, ktthc vic v i t-ng . Nu v tip, li bt u bng mt im mi.

Mi ln g Enter kt thc mt on hoc mt s on lin tip nh-ngch-a kt thclnh.

Kt thc lnh: Donehoc ESC.Hnh d-iminh ho vic v on thng v cc k hiu, -ng dn n cc rng buc.

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Sau khi kt thc lnh, ta -c mt hnh phc nh-ng ch-a c kch th-c chnh xc.Dng lnh Create Dimension cho kch th-c v chnh sa kch th-c.Dng lnh Create Constraint cho v chnh sa cc rng buchnh hc.

Cc tr-ng hp c bit v hnh phc bng lnh LINE

Ngoi vic v on thng theo to hai im thng th-ng, chng ti gii thiu thmcc tr-ng hp c bit khi dng lnh Line.

1- V cung trn ni lin vi on thng

a- Cung trn tip tuyn vi on thng va v

Ra lnh Line. V mt on thng. Nhn phm tri chut vo im u mt ca onthng (hnh 1- a), gi phm, r chut thnh cung trn (hnh 1- b). Kt qu nh- hnh 1 - c).

1- a 1- b 1 - c

b- Cung trn vung gc vi on thng va vRa lnh Line. V mt on thng. Nhn phm tri chut vo im u mt ca on

thng, gi phm, r chut thnh cung trn theo h-ng vung gc vi on thng (hnh 1- d). Ktqu nh- hnh 1-e.

1-d 1- eTrong khi v, chng ta c th thay i h-ng r chut thay i h-ng ca cung.

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2- V on thng tip tuyn vi -ng trn, cung trn hoc ElpRa lnh Line. Nhn phm tri chut vo cung trn, -ng trn hoc elp, gi phm, r

chut tm im tip theo ca on thng (hnh 2.- a, b). on thng t ng tip tuyn vi cc

i t-ng ni trn. Kt qu nh-hnh 2-c).

2-a 2- b 2- c

2.2.2.2Lnh v -ng cong trn - SplineDng lnh:

Thanh lnh: ,nt ny nm chung vi nt , nhn nt, nt lnh hin ra.Gii thch:

Ging nh- Line, con tr hin ra, mi ln nhn phm tri chut ta c mt im caSpline.

Nu im u v im cui ca Spline trng nhau, kt thc mt chu trnh, -ngSplinekhp kn -c v ra.

Mun v -ng Splineh, nhn phm phi chut ti im cui, Trnh n nghinra, chn Continuehoc g Enter hoc nhy p chut kt thc mt on cong nh-ng ch-akt thc lnh.

Nu chn Back, b on va v, con tr tr v im ngay tr-c .Nhn phm phi chut vo vng trng, chn Donekt thc lnh.Ngoi vic v cc on cong theo to cc im thng th-ng, chng ti gii thiu

thm cc tr-ng hp c bit khi dng lnh Spline.

V -ng cong tip xc ni lin vi on thng

Ra lnh Spline.

Nhn phm tri chut vo im u mt ca on thng, gi phm, r chut thnh -ngcong tip xc vi on thng (hnh a), nhn phm tri chut nh v im tip theo.

Kt qu nh- hnh b.

a b

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2.2.2.3Chnh sa SplineSau khi v xong, -ng Spline-c chnh sa nh- sau:- Chnh sa bng cc im nt(cc im khi bm chut m Splinei qua): nhn chut

vo cc im nt ny v ko, hnh dng ca Splineb thay i.

- Bng cc lnh ti Trnh n ng

-a con tr vo Spline v nhn phm phi chut. Trnh n ng hin ra:

Trn Trnh n nggm cc mc sau:Close Spline:khp kn -ng cong.

Insert Point: thm im nt. Mi ln nhn phm tri vo -ng cong, ti c thmmt im.

Fit Method: cc ph-ng thc lm trn. Nhn chut tri, hin ra 3 ph-ng thc:Smooth, Sweet v AutoCAD, mi ph-ng thc c cong khc nhau.Display Curvature:cho hin cc -ng php tuyn th hin cong.

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Bowtie - nt gc ca cung. Nhn nt , hin ra cc ph-ng n bin i hnh dngcung.

- Handle: dng th cng (bng tay).Cc nt ca -ng tip tuyn vi cung hin

ra, nhn phm tri chut vo nt v r chut, hnh dng -ng cong bin i theo (hnh a ).

a b- Curvature:dng cung nh cong. C thm mt cung km theo cc nt gc

hin ra ti im un, nhn phm tri chut vo nt v r chut, hnh dng -ng cong bini theo bn knh cung (hnh b).

- Flat:bin on cong thnh phng.

Spline Tension: cng ca -ng cong. Hp thoi cho s liu xut hin:

Dng thanh tr-t thay i gi tr. Gi tr cng ln, on cong cng gn vi -ngthng (cng) (hnh d-i).

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2.2.2.4Lnh v -ng trn - CircleDng lnh:

Thanh lnh: nhn nt chn ph-ng n v.Bn phm: Shift + C.

Gii thch:Trn thanh cng c c hai cch v -ng trn:

1-V theo tm v mt im khc trn -ng trn -hocShift + CDng nhc:

Select Center of Circle: cho tm -ng trn.Select Point on the Circle: cho mt im trn -ng trn.

2- V -ng trn tip xc vi 3 on thng

Dng nhc:

Select First Line: chn on thng th nht.Select second Line: chn on thng th hai.Select a line to create Circle: chn on thng cui cng to ra -ng trn.

p li cc dng nhc trn bng cch -a con tr n cc -ng thng, nhn phm trichut. Hnh d-i minh ho cc dng v -ng trn tip xc vi 3 on thng.

2.2.2.5Lnh v hnh Elp - EllipseDng lnh:

Thanh lnh : .

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Nt Elpnm trong nt v -ng trn nh- thanh cng c minh ho. Nhn nt, nt lnh hin ra.

Gii thch:

Dng nhc:Select ellipse center: cho tm im.Select first axis point: cho im u mt trc.Select point on ellipse:cho mt im trn elp.

Tt c u nhn phm tri chut.Kt qu -c 1 hnh elp. Hnh d-i minh ho cch v Elp.

2.2.2.6Lnh v cung trn - ArcDng lnh:

Thanh lnh: , nhn nt chn ph-ng n v.

Gii thch:C 3 cch v cung trn.

1- V theo 3 im u, cui v trn cung trn -

Dng nhc:Select start of arc: cho im u ca cung trn.

Select end of arc: cho im cui ca cung trn.Select point on arc: cho mt im trn cung trn.

2- V theo tm, im u v im cui -

Dng nhc:Select center: cho tm im.Select start point: cho im u ca cung trn.Select end point: cho im cui.

3- V theo 1 im u mt ca i t-ng khc v im cui -

Dng nhc:

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Select start point: cho im u ca cung trn. im ny phi l u mt ca mt it-ng khc nh- cung trn hoc on thng.Cung trn -c ni vii t-ng c v tip tuyn vi nhau.

Select end of arc: cho im cui ca cung trn.i vi cc hnh -ng trn, cung trn, elp khi v khng c ph-ng n tip xcnhau hoc tip xc vi on thng nh-ng sau khi v c th dng cc rng buc to cc tip xc cn thit.

2.2.2.7Lnh v hnh ch nht - RectangleDng lnh:

Thanh lnh: , nhn nt chn ph-ng n v.Gii thch:

C 2 cch v hnh ch nht.

1- V theo hai im ca -ng cho -

Dng nhc:Select first corrner: cho im u ca -ng cho.Select opposite corner:cho im i din.

V bng ph-ng php ny -c hnh ch nht c hai cnh nm ngang v thng ng(hnh a).

2- V theo 3 im gc -

Dng nhc:Select first corrner: cho im ca gc th nht.Select second corner: cho im gc th hai. im ny v im th nht cng nm trn mt

cnh.C th ko theo ph-ng bt k.Select third corner: cho im gc th ba. Con tr t ng ko theo ph-ng vung gc vi

cnh -c to bng hai im trn.V theo ph-ng php ny -c hnh ch nht nm theo ph-ng bt k(hnh b).

a b

2.2.2.8 Lnh v mt im - Pointim (Point) -c dng vi mc ch sau:- Lm tm l khi v cc l 3D hoc tm -ng trn.

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- Lm im dng mt phnglm vic (Work plane) cha hnh phc.- Lm im to im lm vic (Work point) dng -ng 3D trong khng gian.

1- V trc tipDng lnh:

Thanh lnh:Gii thch:

Dng nhc:Select Center point: cho tm l. -a chut n v tr cn thit nhn phm tri. Kt thc lnh

bng ESChoc Done. Khi v l, c im bt tm. Cc im -c hin th bng du

t v tr ca im mt cch chnh xc cch cc cnh mt khong cho tr-c, dnglnh Create Dimensionv Edit Dimension.Khi cho kch th-c, nhn chut vo im v v on thng hoc i t-ng cn ly

khong cch, kch th-c hin ra v cho s (hnh d-i).

2- Nhp t tp d liu

Dng lnh:

Thanh lnh:

Thanh cng c: 3D sketchGii thch:

Tp d liu -c to ra bng Excel. Ni dung ca bng d liu phi tun th theo cphp nh- hnh d-i.

i vi hnh phc 2D khng cn nhp gi tr Z.

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Sau khi ra lnh, hp thoi xut hin.

Nhn chn tn tp cn nhp. Nhn Open, cc im -c v ra.

2.2.2.9Lnh v a gic uDng lnh:

Thanh lnh:Gii thch:

Hp thoi xut hin:

nhp s cnh. G s hoc nhn nt bn cnh chn cc s c sn.Ti y c 2 cch v:

v theo tm v nh

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v theo tm v trung im mt cnh

Dng nhc:Select center of polygon:cho tm im.Select point on polygon:cho im trn a gic. im ny tu theo cch v, l nh hay trung

im ca cnh.Trong qu trnh ang v mt hnh, ta c th thay i s cnh, cch v, lp tc hnh thay

i theo.Kt thc lnh: nhn Done.

2.2.2.10 Lnh 2D Fillet ngha:

Lnh dng v gc thnh cung trn, ch dng -c cho giao im gia cc on thng,gia cc cung trn v on thng vi cung trn.Dng lnh:

Thanh lnh:Gii thch:

Hp thoi nhp bn knh cung:

Dng nhc:

Select line or arc to fillet:chn hai on thng hoc cung trn fillet. Nhn nt ON(chm xung) khng ghi kch th-c cung trn v gc, OFF (ni ln) c ghi kch th-c.

Kt qu nh- hnh d-i

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2.2.2.11Lnh 2D Chamfer ngha:

Lnh dng vt gc cc nh.

Dng lnh:

Thanh lnh: nt ny nm trong cng v tr vi Fillet. Nhn nt chn lnh.Gii thch:

Hp thoi chn cc ph-ng n:- Hai khong cch t nh n im pht bng nhau. Ch phi nhp mt gi tr nh- hp

thoi (hnh a).- Hai khong cch khc nhau, phi nhp hai gi tr Distance 1v Distance 2(hnh b).

- Cho mt khong cch v mt gc, phi nhp Distance: khong cch v Angle: gc(hnh c).Dng nhc:

Select line to chamfer:chn hai on thng.

a

b

c

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Nhn nt chm xung s t ng ghi kch th-c.

Nhn nt chm xung, khng ghi kch th-c ti v tr pht gc.

Nu c ghi kch th-c, s d dng thay i gi tr kch th-c, hnh s thay i theo.

2.2.2.12Lnh Mirror ngha:

V hnh i xng qua mt trc.Dng lnh:

Thanh lnh:Gii thch:

c im ca lnh ny l i t-ng mu ly i xng v trc i xng phi l cc it-ng c trong bn v.Hp thoi chn cc ph-ng n:

Select: chn i t-ng. Dng nhc: Select Geometry to mirror.Mirror line: chn trc i xng. Dng nhc: Select Mirror line.Trong ny c th chn i t-ng tr-c hoc sau chn trc. i t-ng -c chn ly i xng khng th -c chn lm trc i xng. Sau khi mi i t-ng -c chn y , nt Applymi -c kch hot. Nhn Apply

thc thi. C th lm tip vi cc i t-ng khc n khi nhn Donehoc ESC, lnh mi ktthc.

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2.2.2.13 Lnh Rectangular Pattern ngha:

To ra mt lot cc hnh, xp theo hng v ct.

Dng lnh:

Thanh lnh:Gii thch:

Hp thoi xut hin:

Trong hp thoi c cc nt:Geometry: chn hnhgc. Nhn chut vo i t-ng cn chn.

Direction 1: h-ng pht trin th nht. Nhn nt chn mt on thng lm ph-ng,

nhn nt nh h-ng. Hai ph-ng l hai on thng hp vi nhau mt gc btk.

cho s hnh. G s.

khong cch. G s hoc nhn nt chn cch cho gi tr hoc ccgi tr c sn.

Direction 2 - t-ng t nh-Direction 1.

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Sau khi xc nh y cc yu t nh- hnh d-i, c th nhn nt hin raphn la chn ph (hnh d-i)

Supress: loi b mt s hnh trong dy. Nhn chut vo hnh cn loi b.Hnh ny s khngthamgia vo vic to nn hnh khi.

Associative:ON (c nh du) - cc hnh gn kt thnh mt khi, mt hnh b thay i , cchnh khc cng thay i theo. OFF (khng dnh du) - cc hnh l cc c th ring r.Mc nh l ON.

Fitted:ON (c nh du) - cc hnh nm cchu nhau trong on c di cho trong nhp

khong cch. OFF (khng dnh du) - cc hnh cch nhau mt on bnggi tr chotrong nhp khong cch.

Fitted:ON Fitted:OFFNhn OK, kt thc lnh.

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2.2.2.14 Lnh Circular pattern ngha:

To ra mt lot cc hnh, xp theo vng trn. Cc hnh -c to ra lun xoay h-ng tm.

Dng lnh:

Thanh lnh:Gii thch:

Hp thoi xut hin:

Trong hp thoi c:Geometry: chn hnh gc. Nhn chut vo cc i t-ng gc

Axis:chn mt im lm tm dy. im ny phi l cc u mt, tm ca vng trn, cung trnhay l mt im (point) -c v trong bn v.

Nt nh chiu khai trin ca dy.

:cho s hnh. G s

cho gc tm dy. G s.

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Sau khi xc nh y cc yu t nh- hnh d-i, c th nhn nt hin raphn la chn ph na bn d-i hp thoi:Supress: loi b mt s hnh trong dy. Nhn chut vo hnh cn loi b. Hnh ny khng

tham gia vo victo khi.Associative:ON(c nh du) cc hnh gn kt thnh mt khi, mt hnh b thay i, cc

hnh khc cng thay i theo. OFF(khng dnh du) cc hnh l cc c th ring r. Mcnh l ON.

Fitted:ON(c nh du)cc hnh u v cui cch nhau bng gi tr gc tm , OFF(khngdnh du)cc hnh cch nhau mt gc bng gi tr cho trong gc tm .

Fitted: ON

Fitted: OFFCc hnh lun xoay h-ng tm.

2.2.2.15 Lnh chnh sa dyChnh sa khi hnh -c to bng Cirrcularv Rectangular Pattern.Khi mt dy -c to ra, nhn phm phi chut vo thnh vin ca dy, Trnh n ng

hin ra.

Suppress Element(s):loi b mt s thnh vin ca dy. Thnh vin chn b loi.

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Delete Pattern:xo dy. Cc bn sao b xo, hnh gc vn gi nguyn.

Edit Pattern:sa dy. Hp thoi Patternhin ra thay i cc tham s.

2.2.2.16Lnh Offset ngha:

V mt i t-ng song songvi i t-ng gc v cch i t-ng gc mt on cho tr-c. Dng lnh:

Thanh lnh:Gii thch:

Sau khi ra lnh, nhn phm phi chut chn cc ph-ng n la chn i t-ng v rngbuc gia cc i t-ng mi vi i t-ng gc. Trnh n ng nh- sau:

Loop Select: ON - cc i t-ng ni nhau lin hnh s -c chn ng thi. mi ln nhnphm tri chut, i t-ng -c chn s l mt xu cc i t-ng kt lithnh mt -ng lin v dnh vo con tr di chuyn.OFF - cc i t-ng c th -c chn ring r.mi ln ch chn -c mti t-ng ring r. Kt thc chn i t-ng bng Enter hoc nhn phmphi chut, chn Continue. Tip theo, hnh offset dnh vo con tr ng-i dng ko v t vo v tr cn thit.

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Constrain Offset:ON - i t-ng gc v i t-ng sao chp gn vi nhau thnh mt khi.Khi c mt lot cc i t-ng to thnh mt bin dng khi cho khong cch gia mttrong cc i t-ng ny vi i t-ng gc th tt cc cc thnh vin ca bin dng cng

cch cc i t-ng gc t-ng ng bng khong cch va cho (hnh a).OFF - i t-ng gc v i t-ng pht sinh khng c rng buc g. Cc khong cchgia cc i t-ng (gc v mi) trong cng mt bin dng c th l khc nhau (hnh b). Dng nhc:

Select curver to offset:chni t-ng offset.Dng nhc ti b-c ny l:Select offset position:chn im t. Nhn phm tri chut ti v tr cn thit.Sau y l cc hnh minh ho cch Inventorthc hin lnh:

Bn v ch-a c offset.

Hnh a Hnh bCc khong cch cn chnh xc dng lnh Create Dimensioncng ging nh- cc i

t-ng khc.

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2.2.2.17Lnh Extend ngha:

Ko di cc i t-ng n cc i t-ng i din.

Dng lnh:

Thanh lnh:Gii thch:

Sau khi ra lnh, dng nhc:Select curve to extend:chn i t-ng ko di.Khi con tr chm n i t-ng no, nu

c kh nng ko di, lp tc hin on ko di n i t-ng gn nht. Nhn phm trichut, cng vic -c hon tt.Khi ang thc hin EXTEND, nhn phi chut, chn TRIM s thc hin ct b hoc

ng-c li.

Hnh d-i minh ha cc on -c ko di.

Hnh gc

i t-ng -c chn v ko di.

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2.2.2.18Lnh Trim ngha:

Ct b nhng phn tha hoc c mt i t-ng.

Dng lnh:

Thanh lnh:Gii thch:

Sau khi ra lnh, dng nhc:Select portion of curve to trim:chn on cn ct. Khi con tr chm n on no, on

b nh du thnh t on, nhn phm tri chut, on hoc i t-ng b xo. Khi ang thc hin TRIM, nhn phi chut, chn EXTENDs thc hin ko di hoc

ng-c li.Hnh d-i minh ha cc on b ct b.

Hnh gc

Chn i t-ng Kt qu

2.2.2.19Lnh Text ngha:

Ghi ch vo hnh phc.Dng lnh:

Thanh lnh:

Bn phm: T

Gii thch:Vic ghi ch vo hnh phc c mt s chc nng sau:- ghi dng m t hnh phc. y l chc nng ph.

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- to bin dng cho vic gn ch d-i dng hnh khi vo b mt chi tit. Chng ta sminh ho chc nng ny bng v d trong phn to hnh khi.

Sau khi ra lnh, nhn mt im t dng ch. Hp thoi xut hin:

Sau khi ra lnh, con tr c dng .Nhn con tr vo v tr cn t dng ch, hp thoi xut hin:

Trong hp thoi c cc thng s:Font:chn phng ch. Nhn nt chn.Size: chiu caoch. G s hoc nhn nt chn gc gi tr c sn.

Cc nt cn chnh theo im va chn trn bn v.

Nt iu khin rng buc ch theo cc h-ng. Nhn nt ny, thng sRotation-c kch hot.

chn chiu quay ca dng ch. Nhn nt chn cc chiu:

t tri qua phi.

Phng ch Chiu cao ch

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t trn xung d-i.

t phi qua tri.

t d-i ln trn.Nt chn mu cho ch.

%Stretch:t l gia chiu rng v chiu cao ca ch ci. < 100 ch hp, > 100 ch rng.Line Spacing:cho khong cch gia cc dng. Nhn nt chn cc khong cch.

Ring ph-ng n Exactly, c hin th Value cho gi tr khong cch bng s.

Cc nt chn cc dng c m, nghing hoc gch chn.

Nt chn ghi cc k hiu c bit nh-:

Cc nt phng to, thu nh ch trong khung g ch.trng d-i cng l ni g ch.Nhn OKkt thc vic vit mt khi ch. Kt qu khi ch hin ra hnh phc nh- hnh

d-i.

C th tip tc ghi khi khc hoc nhn Donekt thc lnh.Khi nhn Finish Sketch, dng ch hin trn mt phng v.

Khi ch c th -c di chuyn n v tr bt k trong mt phng bng cch nhn phmtri vo khi ch, gi chut v di chuyn n v tr cn thit.

2.2.2.20Chnh sa khi chDng lnh:

Trnh n ng: Edit Text.Gii thch:

Nhn phm phi chut vo khi ch, chn Edit Sketch chuyn sang mn hnh vphc. Tip tc nhn phm phi chut vo khi ch, chn Edit Text. Hp thoi hin ra chnh

sa.Chng ta s nghin cu ng dng dng ch to hnh khi 3Dtrong phn sau.

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2.2.2.21Lnh Insert Image ngha:

Chn bc tranh dng .BMP vo hnh phc.

Dng lnh:

Thanh lnh:Gii thch:

Vic -a bc tranh vo hnh phc c mt s chc nng sau:+ Dng v li cc -ng bao bng cc i t-ng ca Inventor to ra bin dng xy

dng hnh khi 3D.+ Dng lm hnh can dn ln b mt ca chi tit. Hp thoi chn tp tin hnh nh *.BMP hin ra:

Chn tp tin cn thit, nhn Open.Tr li bn v phc, nhn phm tri chut chn im t. Mi ln nhn phm tri chut ta

-c mt bc tranh.Nhn phm phi chut, chn Donekt thc lnh.Bc tranh -c gn vo mt phng v phc.

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Chng ta c th di chuyn bc tranh bng cch nhn phm tri v gi chut ti cc imnh- trong hnh minh ho v -a n v tr cn thit.

T-ng t, chng ta cng c th phng to, thu nh v xoay bc tranh.

Chng ta s nghin cu nghaca bc tranh trong cc phn sau.

2.2.2.22Lnh Move ngha:

Chuyn i t-ng t im ny nim khc.Dng lnh:

Thanh lnh:Gii thch:

Lnh ny ch thc hin -c khi c im gc v im ch l cc i t-ng trong bnv.

Sau khi ra lnh, hp thoi xut hin:

Nhn nt Select chn i t-ng.Dng nhc: Select Geometry to move: chn i t-ng di chuyn.

Nhn nt chn im gc, dng nhc: Select first point.

Nhn nt chn im ch, dng nhc: Selct second point.

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Cc im y phi l cc im thc s nh- im u mt ca cc i t-ng, tm -ngtrn, cung trn, hoc l mt im -c v bng lnh point. Cc im khc nh- trung im,giao im khng -c chn. Nu mun bt vo trung im phi v mt im ti tr-c.

Chn

Copys c thm mt hnh.Nhn Applykt thc mt ln, mhm Donekt thc lnh.Hnh d-i minh ho lnh Move.

Hnh gc

Hnh di chuyn CopyNgoi lnh Move, cc i t-ng nm ring bit hoc c mt cm cc i t-ng lin

kt vi nhau bng cc rng buc c th b di chuyn bng cch ko mt ca s chn ton b sau nhn vo mt trong cc i t-ng v di chuyn, lp tc c cm hoc i t-ng nm ring

bit -c chn s di chuyn n v tr mi khng cn c cc im v tr-c.Nu khng chn ton b m nhn chut vo cc nt ko, hnh b ko dn xc xch.

2.2.2.23 Lnh Rotate ngha:

Xoay i t-ng i mt gc.Dng lnh:

Thanh cng c:

Thanh lnh:Gii thch:Sau khi ra lnh, hp thoi xut hin:

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Nhn nt Select chn i t-ng.Dng nhc: Select Geometry to Rotate: chn i t-ng xoay.

Nhn nt chn tm xoay, dng nhc: Select center point.Angle:cho gc xoay, >0 ng-c chiu kim ng h,

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2- Xo c bn v phc

Nu nhn phm tri chut ti tn ca hnh phc (v d: Sketch1) trn Trnh duyt, tonb hnh trong bn v phc -c chn.

Nhn phm phi, chn Delete, tt c b xo.Cc lnh Copy, Deletedng cho tt c cc i t-ng k c cc hnh khi (feature)

sau ny.

2.2.3Rng buc hnh hc gia cc i t-nghnh phc

Theo quan im ca Inventor,cc hnh nh-on thng, cung trn, -ng trn, hnhelp, ch nht v.v...khi ghp li lin mch vi nhau chng c s gn b rt khng kht c v kchth-c cng nh- v tr t-ng i v ph-ng. Khi mt i t-ng c thay i, ko theo cc it-ng khc cng thay i theo cho ph hp.

Khi v, nu trong bn v c mt s i t-ng, con tr l-t qua i t-ng no, nu vtr thch hp, Inventor t ng sinh ra cc rng buc nh- l bt song song hoc vung gc,thng ng hoc nm ngang bng cc k hiu hoc -ng chm m dn dt cho vic v thitk -c chnh xc v nhanh chng. Khi v xong, cc rng buc ch-a -c nh- , c th dngcc rng buc chnh sa.

2.2.3.1Cch to rng buc hnh hcRng buc hnh hcgia cc i t-ng vi nhau to ra mi lin kt cht ch gia chng.

Cc i t-ng b rng buc khng th tu tin thay i v tr hoc t- th nu rng buc khng cho php. Cc rng buc ny cng c th b ph v bi lnh Delete.Dng lnh:

Thanh cng c: nhn vo nt , mt bng cc rng buc hin ra, mun to rngbuc no, nhn vo nt .

Thanh lnh: , nhn nt, trnh n lit k cc rng buc hin ra.

Trnh n ng: Create Constraint, trnh n lit k cc rng buc hin ra nh- sau:

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Cc rng buc c ngha sau:Perpendicular t vung gc vi mt thnh vin no .Parallel t song song vi mt thnh vin khc.

Hai rng buc ny c chung dng nhc:Select First line or ellipse axis:chn -ng th nht hoc mt trc ca Elp. y li t-ng gc (c nh).Select second line or ellipse axis:chn -ng th hai hoc mt trc ca Elp. y li t-ng ph thuc (b thay i).

Tangent t tip xc vi -ng trn hoc cung trn. Trong ny c th cho cc it-ng tip xc nhau:- Chn on thng tip xc vi -ng trn, cung trn hoc elp.- Cung trn, -ng trn hoc elp tip xc vi nhau.

Coincident t bt dnh vo mt im ca i t-ng.

Concentric t ng tm vi cung trn hoc -ng trn.Dng nhc:Select first cirrcle arc or ellipse:chn -ng th nht.Select second cirrcle arc or ellipse:chn -ng th hai. Cng nh- trn, i t-ng not rng buc b di chuyn.

Colinear t cng nm trn mt -ng thng. T-ng t nh- trn.Horizontal t nm ngang.Vertical t thng ng.Equal t mt i t-ng bng i t-ng khc v kch th-c.

Dng nhc:Select first line, cirrcle, arc to equaltion: chn on thng, cung, -ng trn th nht lm php bng nhau.Select second line, cirrcle, arc to equaltion:chn -ng th hai. Cng nh- trn, it-ng no t rng buc b thay i. Nu chn vo cc i t-ng c rng buc bngnhau vi i t-ng khc, cc i t-ng s theo tnh bc cu.

Fix t c nh khng thay i v tr cng nh- kch th-c. Symmetry t i xng vi i t-ng khc qua mt trc.

Dng nhc:Select first sketch element or Restat: chn i t-ng th nht.Select second sketch element or Restat:chn i t-ng th hai.Select a symmetry line:chn trc i xng.

Cng nh- trn, i t-ng no t rng buc b di chuyn. Cc i t-ng b rng buc vii t-ng -c chn s b thay i theo gi rng buc c.

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Smooth lm cc -ng cong tip xc nhau li hoc lm. Nhn chn hai -ng cong ni vinhau bng im gy khc. Rng buc ny s to ra hai on tip tuyn nhau ti tipim, s l lm hoc li tu theo tip tuyn ca hai on cong.

Cc rng buc ny c th -cs dng ngay trong lc v hoc sau khi v xong quaysang chnh sa bng lnh Create Constraintsv Edit Constraints.

2.2.3.2Cho hin v n cc rng buc hnh hcKhi v xong mt bn v phc, kim tra chng ta c th cho hin cc rng buc.

Dng lnh:

Thanh lnh:Trnh n ng: + Cho hin cc rng buc:

Show AllConstraint.+ Cho n cc rng buc:HideAllConstraint.

Gii thch:Sau khi ra lnh, cc rng buc hin ra hoc n i. Mun n rng buc ca tng i t-ng, nhn nt ti rng buc cn n.Cc rng buc ny c th g b (xo i) ring r cho tng i t-ng. Khi -a con tr vo ntrng buc, nt -c hin mu ng thi cc i t-ng b rng

buc cng hin mu rt d kim sot.

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Cch xo rng buc

Dng mt trong hai cch sau y:- Nhn phm tri chut vo rng buc cn xo, -a con tr ra ngoi, nhn phm phi,

chn Delete.- Nhn phm phi chut vo rng buc cn xo, chn Delete.Khi rng buc b xo, cc i t-ng tr-c y lin quan -c gii phng, c th thay i

v tr hoc t- th.

2.2.4Rng buc v kch th-cTrong Inventor, lnh ghi kch th-c (Dimension) khng ch cho bit kch th-c mcn l cc gi tr thay i hnh dng ca i t-ng.

2.2.4.1Thanh nhp s liu khi v hnhTrong Inventor chng ta c th v bin dng t-ng t nh- hnh mu sau to rng

buc v hnh hc gia cc hnh to nn bin dng v cho kch th-c. ng thi vn c th chos liu trc tip khi ang v. Trong cc lnh v v cc lnh hiu chnh c vic chn im, im -c cho bng cch nhn chut trc tip trn mt phng phc hoc nhp theo cc ph-ng ntrong cc ca thanh cng c. Thanh cng c nh- sau:

hin thanh cng c ny dng lnh:View Toolbars Inventor precise input.Thanh ny ch -c kch hot khi c mt lnh v hoc lnh hiu chnh ang thc hin.

Nhn nt sau chn mt im t gc to t-ng i.

Nhn nt , gc to t-ng i lun bm theo v dnh vo im -c v cui cng. Nhn nt chn cch nhp gi tr. Cc ph-ng n hin ra, nhn chn mt ph-ng n.

+ XYcho gi tr vo 2 X v Y. Nu ch nhp mt gi tr X hoc Y, im ny s nm trn

-ng nm ngang hoc thng ng.

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+ Cho gi tr X v gc nghing.

+ Cho Y v gc nghing.

+ Cho di v gc nghing.

Cc gi tr trn u ph thuc vo v tr ca gc to t-ng i.

2.2.4.2Lnh Create Dimension ngha:

Ghikch th-c cho cc i t-ng v phc nhp gi tr chnh xc. Kch th-c ny nh rng buc v kch th-c ca cc i t-ng .Dng lnh:

Trnh n ng: Create DimensionThanh lnh:Bn phm: g d

Gii thch:Vi mi loi i t-ng c nhng thao tc ghi kch th-c khc nhau. Chng c th -c

phn ra s b nh- d-i y.

1- Ghi di

-a con tr n i t-ng, mi tn ch h-ng ghi kch th-c hin ra. Nhn tri chut, cm kch th-c hin ra. C th thc hin chn kch th-c theo cch sau: + -a con tr theo h-ng nm ngang hoc thng ng chi kch th-c theo hnh chiuln trc X hoc Y.Nhn tipvo i t-ng -a con tr h-ng vung gc vi i t-ng ghi di i t-ng.

Gc to t-ng i

im sp v

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+ Nhn phm phi chut, trnh n ng hin ra.

Nhn chn:Vertical: ghi theo trc Y.Horizontal:ghi theo trc X.Aligned: ghi chnh di ca i t-ng.

Nhn phm tri chut, kch th-c hin ln.

2- Ghi khong cch

+ Nhn p phm tri vo cm kch th-c, mt nhp s liu hin ra . Cho gi tr kchth-c ca i t-ngva chn, nhn nt bn cnh cp nht gi tr mi.

Lp tc, cc i t-ng-c thay i theo kch th-c cho. Cc i t-ng khc c lin

quan cng thay i kch th-c theo.Trong v d d-i y, on ta v ra c kch th-c ngu nhin l 14,2012732mm. Ta thaybng s 15. Kt qu nh- hnh d-i.

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T kch th-c ca i t-ng th hai tr i c th g cng thc theo cc kch th-c ghitr-c.

V d, khi ghi cho d1c th g: 2*d0trong nhp s, kt qu d1c di gp i d0.

Mun nhp kch th-c hin ra ngay sau khi kch th-c -c kch hot, dng lnhSketch Options, chn Sketch, trong hp thoi ny chnEdit dimension when created.

2.2.4.3Cch nhp s liuT nay v sau trong tt c cc lnh, ti cc nhp liu c dng:

Chng ta c th nhp gi trnh- sau:1- G s.2- Gbiu thc tnh tonbng s v cc hm ton hc thng dng.3- G biu thcph thuc vo cc i l-ng -c t tn bng k hiu v c gi

tr cho tr-c.4- Nhn nt chn cc gi tr c hoc cc ph-ng thc khc.

Khi nhn nt , Trnh n nghin ra:

Nhn chn mt trong gi tr c hoc chn:Measure: ly gi tr o -c ca mt i t-ng c trong bn v. Con tr c dng

, nhn vo i t-ng cn o trn bn v. Gi tr o -c ca i t-ng-c -a vo nhp s liu (xem thm Lnh Measure).

Tolerance:ly dung sai. Hp thoi hin ra cho dung sai:

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Nhn ntti Type chn ph-ng thc ghi dung sai.Cc ph-ng thc l:Default:mc nh theo gi tr thit lp trong Document Settings.Symetrical:cn trn, cn d-i bng nhau. Ch cho mt gi tr dung sai.

Diviation:cn trn, cn d-i khc nhau. Cho hai gi tr dung sai.

Limits-Stacked:gii hn kch th-c ca trc. Cho hai gi tr kch th-c.Limits-Linear:gii hn kch th-c ca di. Cho hai gi tr di.

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MAX, MIN:Gi tr o -c -c coi l MAX hoc MIN.Limits/Fits....:cho dung sai ca l. Nhn nt ti cc Hole, Shaft chn cc k

hiu dung sai t-ng ng.

Cc kch th-c c dung sai.

2.2.4.4Lnh Auto DimensionKhi v -c mt bin dng, ch-a cho kch th-c c th, dng lnh ny t ng hin

kch th-c cc i t-ng va v xong.

Dng lnh:Thanh lnh:

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Hp thoi hin ra:

Nhn nt chn i t-ng cn hin kch th-c. Nu chn i t-ng no th ch it-ng mi hin kch th-c.

Nu khng chn i t-ng, nhn Apply, tt c cc kch th-c t ng hin ra.Nhn Remove tt tt c cc kch th-c.Chng ta c th thay i gi trcc kch th-c ny nh- bnh th-ng.

2.2.4.5Lnh chn ph-ng thc hin th kch th-cKch th-c ca mt i t-ng -c hin th theo 3 ph-ng thc: 1- Hin th gi tr bng s.2- Hin th k hiu bng ch.Cc s kch th-c o -c hoc g vo l cc s bnh th-ng, nh-ng khi hin th l cc

k hiu bng ch d0, d1, d2....theo th t lc ghi. Bt u t kch th-c th hai c th vitbng cng thc c tham s bng ch l cc kch th-c ghi tr-c n, gi tr -c ly theo cngthc, hin th vn l cc k hiu nh- trn.

3- Hin th bng cng thc.Kch th-c l cc bin s, biu din d-i dng ng thc:Cc s kch th-c o -c hoc g vo l cc s bnh th-ng, nh-ng khi hin th l cc

k hiu bng ch d0=....., d1, d2....theo th t lcghi. Bt u t kch th-c th hai c thvit bng cng thc c tham s bng ch l cc kch th-c ghi tr-c n, gi tr -c ly theocng thc, hin th cng l cng thc. V d: d0 = 2.45, d1 = 5.674, d3 = 2*d1, v. v....

Khi cc k hiu kch th-c tham gia vo cng thc (bin s) thay i gi tr th cc it-ng ph thuc cng thay i theo c v gi tr cng nh- hnh dng.

Cc thit lp ph-ng thc hin th ny -c gii thiu ti lnh Document Settings -> Units, hoc c th chn ph-ng thc hin th v to rng buc v kch th-c gia cc it-ng ngay ti cm kch th-c trn hnh phc.

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Dng lnh:C hai cch:

1- -a con tr ra khong trng ca bn v, nhn phm phi chut, s hin mt Trnh n ng,

nhn chn Dimension Display, chn mt trong cc ph-ng thc hin th:

Value cho hin th bng s.Name cho hin th k hiu bng ch.Expression cho hin th bng cng thc.Tolerance cho hin c dung sai.Precise Value cho hin gi tr chnh xc. Kch th-c s hin ra vi 8 ch s

thp phn sau du phy.2- -a con tr vo mt kch th-c bt k, nhn phm phi chut, s hin mt Trnh n ng,

chn Dimension Properties.Gii thch:

Khi nhn chn theo cch 1, cc kch th-c lp tc hin th theo ph-ng n chn. Khi chn theo cch 2, hp thoi xut hin:

Nhn chn mc Document Settings, nhn nt ti Modeling DimensionDisplay,mt danh sch cc ph-ng thc hin ra, nhn chn mt ph-ng thc cn thit, nhnOKkt thc.

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Ti y cng c th cho gi tr dung sai.Tt c cc kch th-c lp tc hin th theo ph-ng n chn. Hnh d-iminh ha hin th kch th-c bng ch v bng cng thc.

2.2.4.6Lnh Parameters ngha:

Lnh ny cho cc kch th-c bng cng thc, cho s, hay ch k hiu kch th-c. Lnh ny c th -c s dng ti cc bn thit k chi tit (Part - .IPT) khi v phc hoc

dng hnh khi cng nh- ti bn lp ghp (Assembly.IAM).Dng lnh:

Trnh n: Tools Parameters

Thanh lnh:Gii thch:Hp thoi hin ra:

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Trong hp thoi ny c 2 loi tham s:Model Parameters - cc tham s hnh hc ca m hnh 3 chiu (chi tit). N gm cc kch

th-c ca hnh phc v cc kch th-c ca hnh khi -c thit k trong bn v. Cctham s t ng hin ra, chng ta c th thay i gi tr ca chng.

User Parameters - cc tham s do ng-i dng -a vo. Cc tham s nh- th tch, khi l-ng, di, thi gian v.v.... Cc tham s ny c th hiu nh- cc bin d tr cho cc thngs hnh hc ca chi tit tham chiu ti. Mun to ra cc tham s ny, nhn chut vo mcny, nhn nt Add. Mt dng hin ra cho cc thng s. Mi ln nhn Add, thm -cmt dng.

Trong mi bng gm cc ct sau:

Parameter Name - tn tham s+ i vi Model Parameters, mc nh ldn(d0, d1, d2 v...), c th cho tn khc

tu bng cch nhn vo tn cn thay i sau g tn khc. y chnh l tn bin

s l-u gi tr tham s ca chi tit.+ i vi User Parameters, ti ny chng ta phi t tn mi, cc tn ny khng-c trng vi tn cc tham s ca Model.

Bin SBR -c dng cho d26

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Units - n v o (th nguyn)+ i vi Model Parameters, th nguyn ny ph thuc vo lc chn tiu chun v vph thuc vo tham s rt ra t chi tit thit k.

+ i vi User Parameters, khi nhn vo ct ny, mt bng cc th nguyn hin ra chng ta chn (chng ti cho ting Vit vo bn cnh) :

Nhn vo nt + s hin tip n v chn (hp thoi bn phi). V d trong Lengthcmilimeter(mm), centimeter(cm) v.v....

Equation - biu thcTi y c th g s, biu thc ton hc rng buc gia cc tham s trong chi tit. Value:gi tr ca tham s. Cc gi tr ny t ng hin th theo cc biu thc cho tiEquation.

Comment - li ch thch

Tol. (Tolerance) - nh gi tr dung sai+ i vi Model Parameters, gi tr dung sai -c cho ti lnh Document Settings-> Units hoc cho trc tip trn kch th-c -c chn (xem mc chn ph-ng thchin th kch th-c). Kch th-c no c dung sai -c gch chn.+ Nhng kch th-c no c dng Parameters-c ghi chfx:ng tr-c.

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Ct - cho xut gi tr

Mun xut gi tr no, nhn nh du vo t-ng ng.i vi tt c cc tham s ni trn u c th thay i bng cch nhn phm tri chut

vo tham s cn t hoc thay i, cho gi tr mi.C th thay cc chk hiu kch th-c bng cc ch khc tu . Cng thc ch s rng

buc gia cc kch th-c bng cc biu thc ton hc v n c th b thay i bt c lc notheo ca ng-i thit k.

Nt Display only parameters used in equation: ch cho hin nhng tham s ctham gia trong biu thc.Nhn Donekt thc lnh.Ti bn v nhn nt Updatecc i t-ng trn bn v lp tc b thay i theo.Trong v d, ta thay d2 = 12, kt qu nh- hnh d-i

Qua y chng ta thy cc kch th-c u -c t tn mc nh l dxx, chng ta c tht tn khc theo thit k.

2.2.4.7Chnh sa kch th-cVic chnh sa kch th-c thc ra l chnh sa i t-ng -c tin hnh theo mt trong

cc cch sau:- Khi ch-a c kch th-c: dng lnh Create Dimension.

- c kch th-c: nhy p chut vo kch th-c cn sa, cc b-c tip theo nh- gii thiu trn.- Dng lnh Parameters.

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Nhn nt Diagnose Sketch bt u kim tra. Hp thoi chn cc ph-ng n chnon:

Cc ph-ng n nh- sau:

Redundant points: c cc im tha.Missing coincident constraints: thiu s trng kht.Overlaping curves: cc i t-ng chng ln nhau.Open loops: hnh ch-a -c khp kn.Self-intersecting loops: mt i t-ng t giao vi mnh.Nhn OKtip tc, hp thoi tip theo:

My t ng kim tra v x l. Nhn Finishkt thc.Hnh d-i minh ho mt bn v phc hon chnh.

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2.2.5.4Lnh Measure ngha:

o di i t-ng, gc gia cc i t-ng, din tch, chu vi ca bin dng.

Dng lnh:

Trnh n: ToolsTrnh n ng:

Gii thch:Trong qu trnh v thit k, chng ta c th thc hin cc lnh o (Measure) bt c lc

no.

Sau khi ra lnh, con tr c dng: .

Measure Distance:o di ca i t-ng hoc khong cch gia hai i t-ng hoc haiim im.1- o di i t-ng:-a con tr vo i t-ng, nhn phm tri chut, thng bo di hin ra.

2-o khong cch gia hai i t-ng hoc hai im. -a con tr vo i t-ng (im)th nht, nhn phm tri chut, -a con tr vo i t-ng (im) th hai, thng bo

khong cch hin ra.

Gia hai i t-ng Gia 2 im

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Measure Angle:o gc gia hai i t-ng. Nhn phm tri chut vo hai on thng, thngbo kt qu hin ra.

Measure Loop:o chu vi mt hnh khp kn. Nhn phm tri chut vo hnh khp kn, thngbo kt qu hin ra. i vi hnh khng kn, khng o -c.

Measure Area:din tch mt vng khp knNhn phm tri chut vo hnh khp kn, thngbo kt qu hin ra. i vi hnh khng kn, khng o -c.

Trong khi o, c th nhn nt chn ph-ng thc o khc nh- hp thoi d-i y.

Add to Accumulate:-a kt qu vo b gp (cng dn).Mi ln o mt di, chu vi hoc

din tch, chng ta nhn dng ny cng dn.

Cleare Accumulate:xo kt qu cng dn.Display Accumulate:cho hin kt qu cng dn.Vi mi ph-ng thc o chng ta c kt

qu t-ng ng.Reset: o li. Xo kt qu o i t-ng khc.

Nhn ESChoc nt kt thc lnh.

2.2.5.5Lnh Insert AutoCAD Drawing ngha:

Chn bn v ca AutoCAD hoc AutoCAD Mechanical vo bn v phc.

Dng lnh:

Thanh lnh:

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Gii thch:Bn v AutoCAD hoc AutoCAD Mechanicalth-ng l nhng bn v n gin c th

dng -c vo vic to ra cc khi 3D. Sau khi bn v -c chn vo, tt c cc i t-ng ca

bn v k c mt ct (Hatch)... u bin thnh cc i t-ng thng minh ca Inventor.Sau khi ra lnh, hp thoi xut hin:

Dng chut nh du vo tn bn v cn -a vo., nhn Open. Bn v lp tc -c -avo vng v phc ca Inventor.

Trong hp thoi ny c nt Find tm bn v nu khng nh -c tn th- mc cha n. File of Type:chn kiu tp bn v. Nhn nt , c cc kiu hin ra. C 2 kiu DWGv

DXF.

Slecttive import - chn cc i t-ng -a voCc i t-ng -c chn theo cc nhm sau:- Nhn chn theo lp. Chn cc i t-ng ti cc lp -c nh du -a vo.

Trong ny c danh sch tt c cc lp cha cc i t-ng ca AutoCAD.Hnh bncnh hin th y cc i t-ng, nu lp no khng cn -a vo, trn hnh skhng hin th cc i t-ng thuc lp .

- All: ON - chn tt c cc i t-ng theo cc lp chn.OFF - chn tng i t-ng. Tr-ng hp ny, nhn nt mi tn bn cnh, sau chn i t-ng ti vng cha hnh v.

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Autodesk Inventor 11 Thit k chi tit80C th ly hnh ca tp tin AutoCAD t khng gian m hnh (Model Space) hoc

khng gian giy v (Layout) bng cch nhn chn mt trong hai nt ny.Nt 3DSOLIDS:cho php ly cc hnh khi th c 3D ca AutoCAD.

Import Files Units - n v ca tp nhp voC 2 la chn:Detected Units: chn nv t ng. Theo ph-ng n ny, n v s ly theo thit lp

n v to khi (gi tr INSUNITS) ca AutoCADth-ng l Incherhoc mm.Specify Units: nhn nt chn cc n v: Incher, Cm(xng ti mt) v mm

(milimt).Nhn Finish, bn v -c -a vo v tr thnh cc i t-ng ca hnh v phc .

Chng ta c th s dng mt s i t-ng to thnh bin dng phc v cho vic to rahnh khi 3D.

s dng mt cch hiu qu chc nng ny, chng ta c th v nhng bindng ring bit (m trong Inventorthy kh thc hin) trongAutoCAD sau dnglnh ny chuyn vo Inventor.

2.2.5.6Kt thc vic v phc kt thc vic v phc, chuyn sang b-c to khi 3D, chng ta c th thc hin theo

cc cch sau:- Nhn nt Returntrn thanh cng c.- Hoc nhn phm phi chut ti vng trng ca bn v, Trnh n ng hin ra, nhn

chn Finish Sketch.

Kt thc phn v phc 2D, chng ti mun nhc li l khi thit k cc hnh khi 3D ticc tp tin (file) .IPT, lp rp cc hnh khi titp tin .IAMhoc v cc hnh phng ti tp tin.IDW, nu dng n SKETCH chng ta lun lun phi s dng cc lnh trnh by tich-ng ny.

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IV11 Sketch