TRƯỜNG ĐH SƯ PHẠM KỸ THUẬT HCM KHOA ĐÀO TẠO CHẤT LƯỢNG CAO QUY TRÌNH THIẾT KẾ KHUÔN ÉP NHỰA BÁO CÁO GVHD:Ths. TRẦN MINH THẾ UYÊN SVTH : LÊ VĂN TÀI MSSV:11144168
CC CH THIT K SN PHM TRONG CNG NGH P PHUN
CC CH THIT K SN PHM TRONG CNG NGH P PHUN
TRNG H S PHM K THUT HCMKHOA O TO CHT LNG CAO
QUY TRNH THIT K KHUN P NHA
BO CO
GVHD:Ths. TRN MINH TH UYN SVTH : L VN TI MSSV:11144168
QUY TRNH THIT K KHUN P NHABN V THIT KTHIT K SN PHM V KHUNN T HNG
ZC TNH ,CHN VT LIU, LP RP
N T HNGNhu cu ca con ngi s lng nhiu hay t Quyt nh cch sn xut
I.THIT K SN PHM V KHUN
1.GC THOT KHUN i vi sn phm c gn, vu li, rnh su hay c b mt vt ta nn thit k gc vt theo hng m ca khun sn phm c th thot khi khun 1 cch d dng.Chi tit khng gc vt Chi tit c gc vt
Saing
Saing
Saing
th gip thit k gc vt cho ph hp.2.B DYa.Hiu qu thit k: Rt ngn thi gian chu k p phun v ch to khun Gim gi thnh sn phm v khun Tit kim vt liu m vn hiu qu Trnh cong vnh, l kh, vt lm, ng hn
y l cc khuyt tt thng gp khi thit k b dy sn phm khng ph hp
Nu phn vt liu bn trong li sn phm ngui chm hn vt liu bn trn b mt, s to ra s co rt khng ng u sn phm. S co rt ny s gy ra cng vnh sn phmSn phm b cng vnh
3.GC BOa.Hiu qu thit k: Sn phm c lm ngui ng u Gim kh nng sn phm b cong vnh Gim s cn dng Gim s tp trung ng sut Nha lng d in y lng khun
Qu mngQu dy
Cc khuyt tt thng gp phi:
Hnh (a) l vt nt.Hnh(b) l vt kha hnh.Hnh (c) l np gp b mt.
4.GNThit k sao cho b dy sn phm cng mng cng tt. ( cng vng tng khi khong cch gn gim li)B dy, gc cn, cao lin quan n nhau, nu b dy gn qu ln dn n vch lm v gc cn qu ln s kh khn in y khun nghing mi bn khong 10, b dy y gn max l 0.8 dy sn phm ni t gn (0.5-0.8)Gn tng bn phi nm thng hng vi hng m khun
Cc gn nn t dc theo 1 hng t cng vng tt (nn t dc).
Cc kiu t gn
5.VU LICc vu li thng dng bt vt hay cc cht bt vt li vi nhau.B dy ca vu nn nh hn 75% b dy t vu, khi b dy vu vt qu 50% d a n cc vt lm trn b mt v ng sut tp trung tng.
Hnh trn l cc thng s thit k vu li
6.L TRN SN PHMa.L khng sut Chiu su ca l thng khng vt qu 3 ln ng knh l. i vi cc l c ng knh nh hn 5mm th t l ny l 2. B dy ca phn vt liu di cng nn ln hn 20% ng knh l loi tr khuyt tt cho mt i din.
Cc thng s thit k l khng sut
b.L sut Khong cch gia 2 l hoc gia cc l vi mp ngoi ca sn phm nn bng 2 ln b dy hay bng 2 ln kch thc ln nht c o theo chu vi ca l.
Cc thng s thit k l sut
7.THIT K SN PHM C RENa.bin dng ren
Ren phi tiu chund.Mt s yu cu cn ch : Bn knh nh ren v chn ren nn rt ln nht c th trnh s tp trung ng sut. on cui ren nn lm trn trnh tun ren, h ren.
To ng trn cui cng ca ren
8.UNDERCUT Undercut l phn trn sn phm gay ra kh khn khi tch khun, nh l ngang trn sn phm, hay l nhng l song song vi mt phn khun. to c nhng l nh th ny chng ta phi t li v khi tch khun ly sn phm ta phi rt li trc ri mi tch khun ly sn phm.V d: Ban u khng th tho sn phm ra khi khun
Sn phm sao khi thit k li c th tho sn phm ra khi khun
GVHD: TRN MINH TH UYN Page 15