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8/3/2019 Bao Cao Thi Nghiem Khuon Mau

1/27

Th nghim khun mu

ti:NG DNG PHN MM PRO/ENGINEER WILDFIRE 4.0THIT K KHUN NP CM IN I 2 CHU

SVTH : ng Phc Huy MSSV: 07103044

GVHD: Trn Minh Th Uyn

NI DUNG BO COI.Sn phmII. Chn vt liu v thng s ca vt liuIII. B dy sn phm

IV. M phng, phn tch dng chy ca nha trong qu trnh p phunV. Tch khun v p thVI. Kim tra gc thot khunVII. Gia cng lng khunVIII. Thit k khun(Dng EMX 5.0)

I. Sn phm1.Gii thiu:- Tn sn phm: NP CM IN I 2 CHU

Hnh 1.1- Np cm l thit b bao bn ngoi cm in nhm mc ch cch ly mi trng lm

vic ca cm vi bn ngoi bo v ngi s dng v tng tnh thm m cho sn phm.2.Cc bc thit k sn phm- u tin khi ng phn mmPro/ENGINEER Wildfire 4.0, to filePartmi, t tn

lsan_pham chn n v mms_part_solid. Sn phm c thit k theo cc bc di y:- Bc 1: To mt khi c tit din nh hnh 1.2, n 45mm v hai pha, ta c nhhnh 1.3.

Hnh 1.2 Hnh 1.3

GVHD: TRN MINH TH UYNPage 1


2/27

Th nghim khun mu

- Bc 2: Dng lnh draft surface to gc nghing 20 thot khun cho 4 mt bn nhhnh 1.4

Hnh 1.4- Bc 3: Dng lnh hole, to l bc c kch thc nh hnh 1.5, v tr ca l nh hnh

1.6

Hnh 1.5 Hnh 1.6- Bc 4: Dng Round bo cc cnh nh trn hnh 1.7 vi bn knh bo l 2mm

Hnh 1.7 Hnh 1.8

- Bc 5: Dng Shell khot rng bn trong vi chiu dy l 1mm, nh hnh 1.8- Bc 6: Cng Cut Extrude khot sut l bt vt 3.5mm.- Bc 7: To mt cha cc l cm bng lnh Extrude, chn phng n n l To

Select, vi mt phng v phc l mc phng DTM1 nm song song v cch mt thp nhtca sn phm 20mm nh hnh 1.9, tit din nh hnh 1.10



3/27

Th nghim khun mu

Hnh 1.9

Hnh 1.10

- Bc 8: Khot 4 l cm, dng Cut Extrude tit din nh hnh 1.11, ta c sn phmnh hnh 1.12

Hnh 1.11 Hnh 1.12

- Bc 9: To vng lm xung quanh 4 l cm, dng Cut Extrude tit din nh hnh1.13, ta c sn phm nh hnh 1.14

Hnh 1.13 Hnh 1.14- Bc 10: Dng round bo trn cc cnh nh trn hnh 1.15 vi bn knh bo l 0,5mm



4/27

Th nghim khun mu

Hnh 1.15- Bc 11: To gn tng cng cho lng trong sn phm. u tin, to gn bn tri trc,

tit din nh hnh 1.17, c sn phm nh hnh 1.18

Hnh 1.17 Hnh 1.18

Tip theo dng lnh mirror to bn gn cn li, ta c nh hnh 1.19

Hnh 1.19- Bc 12: To b phn ngn cch 2 cc in, dng extrude c tit din nh hnh 1.20

trn mt phng v phc l mt trn ca gn tng cng ta c sn phm nh hnh 1.21, vichiu di n nh hnh 1.22, mt bn chn To Select ti mt di ca mt cong

Hnh 1.20 Hnh 1.21



5/27

Th nghim khun mu

Hnh 1.22

II. Chn vt liu nha v thng s ca vt liuCc loi nha thng dng hin nay l: Polypropylene (PP), Polyethylene (PE),

Polystyrene (PS), Styrene co-polymers (ABS) Trong , nha ABS l loi nha k thutchu mi mn cao, chng va p, bn chc, cch in h th. V vy, chn nha ABS lmvt liu cho sn phm trn.

Cc thng s ca nha ABS: ( theo sch THIT K KHUN CHO SN PHM NHA- 1994 - V Hoi n)

- Nhit khun: 10oC - 80oC

- Nhit cui piston vit: 220oC -235oC- Nhit ph hy (ra nt): 310oC- co rt: 0.4% - 0.7%- Nha ABS d b oxy ha trong khun nu gin on sn xut qu 15 pht.

III. B dy sn phmMt ct ca sn phm th hin b dy ln nht, nh nht ca sn phm.

Hnh 3.1: B dy ln nht v nh nht ca sn phmB dy nht ca sn phm l phn cha bn l ca cm, b dy nh nht ca sn phm

l cc thnh bn, v thnh l bt vt, nh hnh 3.1Kim tra b dy chi tit: menu Analysis/ Model/ thich ness, chn tit din ct ngang l

tit din nh hnh 3.1- Nhp b dy l MAX l 4.5, MIN l 4, phn mm thng bo chi tit khng c ch

no dy hn 4.5mm, nhng c chiu dy ln hn 4mm, nh hnh 3.2 vi din tch b mt l247,318638

- Nhp b dy 3mm, kt qu c nh hnh 3.3, thng bo c mt phn din tch lnhn 3mm



6/27

Th nghim khun mu

Hnh 3.2 Hnh 3.3Cht ph gia VPE2300 l mt h ca nha tng hp PE c sn xut nh l mt cht

xc tc tin tin kt hp vi gii php v cng ngh INSITE TM c quyn ca Dow. Vi cutrc kiu chui c o ny to cho mng film tnh phn quang tt, kh nng hn dn cao,cng thm n hi, mm do, bm dnh v s tng thch trong hn hp nhaABS.

Dng phn mm Pro E tnh c khi lng sn phm : 7,9g

IV. M phng dng chy ca nha trong qu trnh p phun bng MoldflowKt qu phn tch bng phn mm Moldflow:



7/27

Th nghim khun mu

- Qu trnh in y:

Thi gian in y mt 0,3166s

- Biu lc kp:

Lc kp tng chm t thi im mi phun n 0,25s v tng nhanh n lc in y



8/27

Th nghim khun mu

- ng hn:

Ni dng chy nha giao nhau c ng hn nh hnh v

- L kh:



9/27

Th nghim khun mu

L kh gy khuyt tt cho sn phm cn b tr thot kh cho ph hp

- Hng chy ca dng nha

V. Tch khun v p th:Tnh ton s lng khun vi yu cu nng sut ca my

N=0.8xS/m= 0.8x267/8= 28 lng khunTnh ton s lng khun theo nng sut lm do ca myn = P/(X*W) = 1233/ (6*7,9)=26 lng khunX= 60/tc = 60/6 =(10 ln/ pht)Tnh ton s long khun theo lc kp ca myn = (Fp/P-A)/S=(12*10^5/84,3-1000)/3150 = 4,2 lng khunvi Fp l lc kp ti a ca my (N)P l p sut trong khun (N/mm2)(dng Moflow m phng)

A l din tch d kin ca knh dn chiu ln mt phn khun.S l din tch ca mt lng khun chiu ln mt phn khun.ta chn s lng khun bng 4Tnh s lng khun theo kch thc my p :

N= [Dm/Dk]x[Rm/Rk] = [350/150]x[295/90] =6 lng khun.Dm, Rm l chiu di v chiu rng lm vic ca my pDk, Rk l chiu di v chiu rng cn thit thit k mt lng khun.

- u tin khi ng phn mm Pro/ENGINEER Wildfire 4.0, to file Manufacturingmivi sub-type l Mold Cavity, t tn l Mold_openingchn h n v mms_mfg_mold. Sn

phm c tch theo cc bc di y:

- Bc 1: a chi tit vo mi trng Pro/Mold, thit lp s lng khun l 4, hiu chnhsao cho 4 sn phm quay v cng mt hng theo hng tch khun, nh hnh 5.1



10/27

Th nghim khun mu

Hnh 5.1- Bc 2: To phi bng cch to phi t ng vi cc thng s nh hnh 5.2, ta c

sn phm nh hnh 5.3

Hnh 5.2 Hnh 5.3- Bc 3: Nhp h s co rt ca vt liu l 0,05%- Bc 4: To mt phn khun

- Chn Parting Surface, ta c 4 mu sn phm, chn copy cc b mt bao bn ngoica 1 sn phm, sau paste ln chnh v tr nh hnh 5.4. Nhng v trn b mt c ccl cm lm cho b mt b thng nn phi trm cc l ny li bng cch m tab Option vchnExclude surfaces and fill holes nh hnh 5.5, sau chn 5 tit din cn trm li, tac nh hnh 5.6

Hnh 5.4 Hnh 5.5



11/27

Th nghim khun mu

Hnh 5.6- Tng t, to cc surface cho 3 sn phm cn li. bc ny, ta cn c th dng

lnh Mirror thc hin. Ta c nh hnh 5.7

Hnh 5.7- To mt Fill bng cch vo menu Edit/Fill, chn mt phng v phc l mt i qua

chn ca np cm c secsion nh hnh 5.8, ta c nh hnh 5.9

Hnh 5.8 Hnh 5.9- Merge 4 mt ca 4 sn phm vi mt Fill ta c mt phn khun th nht bng

cch chn c 5 mt ri vo menu Edit/Merge

- To mt phn khn th hai trn chia cc tm khun, mt ny cch mt phnkhun 20mm theo hng tch khun bng lnh Extrude.

- Bc 5: To cc tm lng khun



12/27

Th nghim khun mu

- Chia hm khun thnh hai phn trc, chn Volume Split trn thanh cng c, chnTwo Volume chia thnh 2 phn v All Work pieces ct c hm khun. Chn mt

phng ct l mt phn khun, t tn phn di l TAM_DUOI (Hnh 5.10), phn trn lTIEP.

- Tip tc chia TIEP thnh hai phn, chn Volume Split trn thanh cng c, chnTwo Volume chia thnh 2 phn v Mold Volume, chn phn tn TIEP ct, t tn

phn trn l TAM_TREN(Hnh 5.11) vphn di l TAM_GIUA (Hnh 5.12)- Extract cc tm khun ra, trong menu MOLD chn Mold Comp/Extract chn cc

tm mun extract ra.

Hnh 5.10 Hnh 5.11

Hnh 5.12- Bc 6: M khun

Trong menu MOLD chn Mold Opening/ Define step/ Define move, xc nh chiuv gi tr di chuyn ca cc tm ta c nh hnh 5.13 v hnh 5.14



13/27

Th nghim khun mu

Hnh 5.13 Hnh 5.14- Bc 6: p th

- Thit lp h thng knh dn nha, sau dng Moding p th c sn phmnh hnh 5.15

Nha ABS, G = 8g, b dy danh ngha thnh sn phm l 1 mm t suy ra ng knhknh dn tham kho l 3mm.

ng knh knh dn chnh l Dc = Dn x N1/3

N: s nhnh r l 8 Dc = 3x2 =6mm.

Vy kch thc ng knh knh dn chnh l 6mm, knh dn nhnh l 3mm.



14/27

Th nghim khun mu

a

Hnh 5.15

VI. Kim tra gc thot khunTrong menu Mold/Mold Opening/Define Step/ chn Draft check, sau khi phn tch vi

gc draft l 2o , ta c kt qu nh hnh 6.1

Hnh 6.1



15/27

Th nghim khun mu

T kt qu phn tch, ta thy cc thnh ng, gn u tha mn gc thot khun.

VII. Gia cng lng khun7.1. Quy trnh cng ngh gia cng TAM_DUOI

- Bc 1: gia cng th- Bc 2 : gia cng bn tinh

- Bc 3 :Gia cng tinh v nh bng lng khun Bc gia cng th :- Khi ng Pro Engineer / manufacturing / NC assembly- a tm di vo mi trng lm vic ca Pro Engineer- To phi cho tm di

Hnh 7.1 phica tm di

- Chn my v chn chun

Hnh 7.2 chn my , chn chun- Chn phng php gia cng : gia cng bng phng php pocketing ( phng

php ny gia cng c c bin dng mt bn v mt y ) .+ chn dao :



16/27

Th nghim khun mu

Hnh 7.3 chn dao+ Chn ch ct :

Hnh7.4 ch ct



17/27

Th nghim khun mu

- Chn bin dng gia cng

Hnh 7.5 Chn bin dng gia cng- Tin hnh gia cng

Hnh 7.6 gia cng th

Gia cng bn tinh : bng phng php :surface Mill ( gia cng mt y )- Dng my cc dng c ct nh ch gia cng th



18/27

Th nghim khun mu

hnh 7.7 daoChn ch ct :

Hnh 7.8 bng ch ct gia cng bn tinh- Tin hnh gia cng :



19/27

Th nghim khun mu

Hnh 7.9 gia cng bn tinh Bc 3 : gia cng tinh- Chn my v chun nh cc bc trn :- Chn phng php gia cng finishing

+ chn dao :

Hnh 7.9 dao gia cng tinh+ Chn ch ct :

Hnh 7.10 ch ct gia cng tinh+ tin hnh gia cng tinh :



20/27

Th nghim khun mu

Hnh 7.11 gia cng tinh tm di .- Tin hnh nh bng b mt

7.2 Quy trnh cng ngh gia cng TM _GIA :Bc 1 : gia cng thBc 2 : Gia cng tinh v nh bng lng khun .

Gia cng th : Tng t nh gia cng tm di ta cng tin hnh a tm giavo mi trng lm vic , tin hnh to phi , chn my chn chun :

Hnh nh phi tm gia



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Th nghim khun mu

Hnh 7.2 chun , my- Chn phng php gia cng : gia cng bng phng php pocketing ( phng

php ny gia cng c c bin dng mt bn v mt y ) .+ chn dao :

Hnh 7.3 :Dao ph Hnh 7.4 ch ct



22/27

Th nghim khun mu

Chn bin dng gia cng :

Hnh 7.5 bin dng gia cng- Tin hnh gia cng :

Hnh 7.6 gia cng thBc 2 : gia cng bn tinh :

Gia cng bn tinh : bng phng php :surface Mill ( gia cng mt y )- Dng my cc dng c ct nh ch gia cng th- Chn dao :



23/27

Th nghim khun mu

hnh 7.7 dao bn tinh

- Chn ch ct :

Hnh 7.8 ch ct bn tinh- Tin hnh gia cng



24/27

Th nghim khun mu

Hnh 7.9 gia cng bn tinh

Bc 3 :chn phng php gia cng finish- Chn dao

Hnh 7.7 daotinh

-Ch ct



25/27

Th nghim khun mu

-

Hnh 7.8 ch ct .Tin hnh gia cng :



26/27

Th nghim khun mu

Hnh 7.9 gia cng tinh- dng tia laser lm tinh bin dng ca cc rnh gn .

-Tin hnh nh bng lng khunVIII. Thit k b khun hon chnhDng phn mm EMX thit k theo trnh t (xem foder thit k b khun)

- Tm kp di- Gi - To tm gi- To tm gia- To tm khun ci- To tm kp trn- Cc chi tit trong khun bao gm :bc dn hng, cht nh v, vt lc gic chm

trn tm kp di ng, vt lc gic chm trn tm khun kp, cht hi, l xo chthi,h thng rnh rt nha.



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Th nghim khun mu

Khi thit k ch b dy ca khun c v khun ci c th cha c khun, nhngchi tit khc c phn mm tiu chun ha.

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