thiet ke khuon voi solidwork

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li ni u Trong cng cuc i mi i ln ca t nc . Cng nghip ho hin i ho l mt yu cu tt yu ni chung , trong c kh ho trong cc lnh vc sn xut ang l mt yu cu cp thit ni ring . L mt sinh vin ca nghnh c kh chng em lun c nh trng to iu kin tip xc vi cc thit b v qui trnh sn xut c kh , bng th nghim v i thc tp . Y thc c tm quan trng ca vic thc tp nhn thc , n l bc m khng th thiu c ca mi sinh vin . Nn trong thi gian thc tp vi s gip ch bo tn tnh ca thy gio : PGS TS : Trn xun Vit , em ht sc c gng hon thnh nhng cng vic c giao . V vy em c iu kin tip xc vi thc t sn xut , qua c s nhn nhn, nh gi , so snh gia kin thc mnh tip thu c trong trng vi thc tin sn xut bn ngoi . Bn cnh em cng hc hi c rt nhiu lm hnh trang cho vic xy dng ti tt nghip sau ny v c sau khi ra trng . Vi s gip , hng dn tn tnh ca thy gio : PGS -TS : Trn xun Vit , em c giao nhim v tm hiu phm mm Solids Works , phn mm Master Cam l nh hng v ti tt nghip sau ny . Trong thi gian thc tp em hon thnh nhng cc nhim v c c giao.Tuy vy khng th trnh khi c sai st do kin thc cn hn ch , nn em rt mong c s quan tm ch bo tn tnh ca cc thy v c gio trong b mn Cng ngh ch to my.

Qua y cho php em cm n thy gio : PGS TS : Trn xun Vit to iu kin v tn tnh hng dn cho em hon thnh tt t thc tp nhn thc va qua . Mt ln na em xin chn thnh cm n ! ! ! Sinh vin : Bi Minh Sng V Ngc Sng

Chng 1. Gii thiu sn phm nha1.1. vt liu nhit do. nh ngha : Vt liu nhit do l cht do c th nung nng cho mm ra nhiu ln sau khi ngui . N c th c phun khun, c nghin vn li v lp li qu trnh . Tt nhin l vt liu cht do s b mt phm cht khi qu trnh lp li nhiu ln v s mt i cc tnh cht mong i Vt liu ch to chi tit hp c tn thng mi l PolyPropylen (PP). N c kt cu ho hc nh sau:n[ CH 2 = CH ] [ CH 2 CH ] n

Vt liu nhit do ny thng cng v bn dai v c tnh nhng thng khng trong sut do cu trc tinh th gy cn tr cho s truyn qua ca nh sng. Vt liu ny thng c s dng trong cng nghip lm gia dng. S pht trin ca tinh th PolyPropylen ng vai tr quan trng trong s thay i cc tnh cht ca chng. Do cu trc ca PolyPropylen c trt t v i xng m n lm cho lc gia cc chui xch c th pht trin v v vy tinh th ln ln chim ch. Mc khng trong sut ph thuc mt phn vo tc lm ngui trong qu trnh gia

cng ngui nhanh c khuynh hng lm ng bng , ngn cn chuyn ng ca chui v ngn cn s pht trin ca tinh th. Tnh cht ca PolyPropylen c th b thay i bi s sa i trng lng phn t v s chia nhnh chui . S thay i nh th s c hiu qu khng ch i vi cc tnh cht c hc m thay i c s in y vt liu trong khun. Du hiu nhn bit nha PP : Nh Mm a ra Bt la Mu la Vng,xa PP C D nh l C t y Mt s tnh cht khc : Nhit khun 8 mm v gi nguyn nh vy trnh lm thay i tc dng chy khi thay i tit din dng chy. - Chia h thng lm mt lm nhiu vng trnh cc knh nha ko di dn n s chnh lch nhit .

- Ch c bit n vic lm mt nhng phn dy ca sn phm. a. V tr ca h thng lm mt : V tr ph thuc vo kch thc sn phm v s khc nhau v chiu dy thnh sn phm. H thng lm mt nn t ch nhit kh truyn t nha nng sang khun. Vic lm mt nh nhau trn ton b sn phm. b. Lm mt tm khun : L mt trong nhng h thng thng thng nht c dng cho nhng sn phm nh, trong nhiu trng hp, cc knh nha c khoan trn my khoan thng thng, nhng i vi cc knh nha qu di v khng thng, cc knh nha phi cch nhau t nht l 3 mm. i vi cc knh nha di trn 150 mm th cch nhau l 5 mm. c. Lm mt li : Li thng b bao ph bi lp nha nng v vic truyn nhit n cc phn khc ca khun l c mt vn . lm c iu ny, cch n gin nht l lm li bng vt liu c dn nhit nh ng hoc ng berilium. Nhc im ca loi vt liu ny l bn thp. Phng php tt hn l t cc knh lm mt trong li. u im ca phng php ny l c th iu khin c nhit bng s tng hoc gim nhit dng chy cht lng chy qua cc knh. d. Lm mt cht : Lm mt cht kh hn lm mt li v vic truyn nhit n cc phn khc ca khun l rt kh.

e. Lm mt lng khun : Ni chung lng khun c th c lm mt tt v c s dn nhit tt n cc phn khc ca khun.

2.4 Cng ngh ch to khunThit k sn phm Thit k khun Xy dng d liu CAM Thc hin gia cng nh bng m v lp rp (Dng

solidworks to lp bn v sn phm) (Dng solidworks to lp bn v lp lng khun , li khun )

My thng v my CNC

1.Quy trnh ch to khun. ch to ra c mt b khun, ta a ra cc bc ch to nh s di y : - Thit k sn phm : trong phn ny ta c th thit k mi mt sn phm nha theo yu cu hoc phi thc hin vic tho lun vi nh thit k a ra cc phng n m bo cho vic thit k nh : v vt liu ca sn phm, kt cu v hnh dng ca sn phm c m bo tnh cng ngh thc hin thit k c. - Thit k khun : Thit k bn v lp khun xc nh s phn b ca lng khun, c cu y, cc chuyn ng ca khun cn cho vic m khun v to hnh cho sn phm. T a ra bn v chi tit cho tng phn thc hin qu trnh ch to v gia cng. - Xy dng d liu CAM : S dng phn mm Mastercam, Catia lp trnh v m phng qu trnh gia cng trc khi thc hin gia cng thc. - Thc hin gia cng : vic gia cng cc lng khun v li khun c thc hin trn trung tm gia cng CNC, my ct dy CNC, my gia cng bng tia la in CNC.

- nh bng, m v lp rp : to bng cho lng khun v li khun th ta phi thc hin cng vic nh bng bng cc vt liu l cc ht mi c mn sau em m bng Crm. Cui cng l lp rp cc b phn thnh mt b khun hon chnh.

chng 3. tm hiu phn mm solidwork2005Tp on c tr s c tr s t ti bang Massachusetts , Hoa K . y l phn mn chy trn h iu hnh Windows (Bt u t Win98), c vit bng ngn ng Visual Basic v s dng cc cng ngh mi nht v lnh vc ho my tnh . Cc vt th c biu din ht sc trc quan ,sinh ng to cm gic cho ngi s dng nh lm vic trn m hnh tht . Giao din chng trnh thun li cho ngi s dng , khng bt ngi dng phi nh tn cc lnh mt cch chi tit , v cc biu tng ca nt lnh trn cc thanh cng c cho ngi s dng bit s b v chc nng ca chng . Nhng ta cng c th gi lnh t bn phm nh trong Auto Cad bng cch vo : Tool Add-Ins SolidWorks 2D Emulator . a) Bt u vi SolidWorks . Trong phn mn SolidWorks c ba dng bn v Part: thit k cc bn v chi tit dng 3D, cc file ny c phn m rng *.sldprt.

Assembly: Sau khi c cc bn v chi tit Part , c th chon Assembly lp ghp cc chi tit thnh cm chi tit hay thnh mt c cu hay my hon chnh . cc file ny c phn m rng *.sldasm . Drawing: Thit k bn v 2D da trn chi tit thc c sn trn cc bn v Part hay Assembly . SolidWorks s t ng to ra cc hnh chiu t cc im nhn khc nhau chng ta c th la chn d dng . Cc file ny c phn m rng *.slddrw.

Ngoi ra Solidworks 2005 vic trao i cc bn v thit k qua mng internet ton cu rt d dng thng qua cng c eDrawing , tm nhn v m iu ny l c li cho tt c cc k s khi thit k cc chi tit phc tp. b) Nghin ca bn v chi tit Part . V cc i tng 2D : Trong phn ny ta s trnh by cc lnh c bn v cc i tng 2D (ng thng, cong, cc bin dng phc tp) trong SolidWorks lm c s cho thit k cc i tng 3D. Ch : Cc i tng 2D ch thc hin trn mt mt phng v phc tho no sau khi m Sketch. V ng thng vo biu tng trn thanh Lnh: Line v mt on thng. s dng lnh ny c th kch

cng c Sketch Tools hoc t menu Tools\Sketch Entities\Line thun tin kch chut phi mt menu hin ra, sau chn Line.

V hnh ch nht

Lnh: Rectangen

v mt hnh ch nht hay hnh vung. thc hin lnh ny ta cng c th kch s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\ SketchEntities\Rectangen. V hnh ch nht c cnh phng bt k Lnh: Parallelogram v hnh ch nht, hnh vung c cc cnh nghing vi mtgc bt k. thao tc vi lnh ny ta vao menu Tools\ SketchEntities\ Parallelogram V a gic u Lnh: Polygon v cc a gic u. thao tc vi lnh ny ta vao menu Tools\ SketchEntities\ Polygon

V ng trn Lnh: Circle Dng v ng trn. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\ SketchEntities\ Circle. hiu chnh ta cng lm tng t vi cc lnh trn. V cung trn i qua 3 im Lnh: 3 Point Arc Dng v mt phn cung trn. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\Sketch Entities\ 3Point Arc V cung trn ni tip t mt im cui ca i tng khc Lnh : Tangent point Arc Dng v mt phn cung trn ni tip t im cui ca mt i tng khc. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\Sketch Entities\ Tangent point Arc V ng trn qua 3 im ( im tm, im u, im cui ) Lnh: Center Point Arc Dng v mt cung trn. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\Sketch Entities\Center Point Arc V ng Elip Lnh: Ellipse

Dng v mt hnh elip . s dng lnh t menu Tools\ SketchEntities\ Ellipse.

V cung Elip Lnh: Center point Elipse Dng v mt cung hnh elip . s dng lnh t menu Tools\SketchEntities\ Center point Elipse. V ng tm Lnh : Center Line Lnh ny dng v ng tm, khi s dng lnh Mirror, revolve. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\Sketch Entities\ Centerline. V t do Lnh : Spline Dng v ng cong trn i qua cc im cho trc. s dng lnh ny c th kch vo biu tng trn thanh cng c Sketch Tools hoc t menu Tools\Sketch Entities\ Spline. Nhp mt i tng 2 D t Autocad sang Solidworks Ngoi cc lnh v trn cc thanh cng c ca Solidworks th phn mn Solidworks cn cho php nhp bn v 2D t Phn mn Autocad . Khi mt bin dng phc tp thun tin cho vic thit k ta c th lin kt d liu bin dng t phn mm Autocad. nhp mt bn v phc tho phc tp t Cad sang ta lm theo cc bc sau:

Cc lnh chnh sa v nhanh cc i tng 2D Sau y ta s trnh by cc lnh v nhanh, chnh sa cc i tng 2D. Ly i xng Lnh: Mirror v cc chi tit c tnh i xng. s dng lnh ny c th kch vo biu tng trn thanh cng c Ketch Tools hoc t menu Tools\Sketch Tools\Mirror V cung trn Lnh: Fillet

Lnh c tc dng v trn cc i tng c ni lin tip vi nhau(cc i tng c th l cc on thng, cung trn hay cc a gic hay cc ng Spline). s dng lnh ny ta c th kch vo biu tng trn thanh cng c Sketch Tool hay t menu Tools\Sketch Tools\Fillet. Vt gc Lnh: Chamfer

Lnh c tc dng vt gc cc i tng l cc on thng ni tip hay cc cnh ca mt a gic. Ta c th gi lnh ny t biu tng trn thanh cng c Sketch Tool hay t menu Tools\SketchTools\ Chamfer.

Offset

Lnh: Offset Entities

Lnh dng copy mt i tng theo mt khong cnh cho trc. s dng lnh ny ta c th kch chut vo biu tng trn thanh cng c Sketch Tool hay t menu Tools\SketchTools\ Offset Entities. Cht (ct) Lnh: Trim

Dng ct cc phn ca i tng khi cn ct b. Ta c th gi lnh ny t biu tng trn thanh cng c Skecth Tool hoc t menu lnh Tools\SketchTools\ Trim sau tin hnh kch chut vo cc i