Ứng dụng dập thuỷ tĩnh dập vuốt chi tiết dạng tấm trong ngành công nghiệp ôtô

NGHIEN CUU -

LFNG DUNG DAP THUY TTNH DAP VUO T CHI TI^T DANG TAM

TRONG NGANH C6N G NGHIEP OTd

U Trung Ki^n', Pham Van Nghf', Dinh VSn Duy=

'Traesng Dai hgc Bdch khoa Hi N6i, 'Vi$n Miy vi Dyng CM C6ng nghifp - IMI

TOM TAT

Cong nghe d^p thuy tinh Id mot trong nhvCngphUOngphdp gia cdng tao hinh vAt liiu tdtn tiin tih

sit dung chdt ldng cao dp di'ddp vuot cdc chi tiifl dang tdm. Nhd nhSng Uu diim noi bdt ciia phUdng phdp

nhu tdng khd ndng bien dang cua vdt lieu, ndng cao do chinh xdc cdng nhUchdt lUdng bi mdt, cO ~ ly tinh

cua vdt hiu tot, khong cdn gia cdng chdy nin gidm cht phi chi tao khudn. Cdng nghi dap thuy tinh dang

dUdc dp dung hieu qud dctao hinh cdc chi ttet dang tdm vd ong, ddc biit Id trong ngdnh Cdng nghiip 0 to

de chi tao cnc chi tiet phdc tap md cdng nghi ddp vudt truyin thdng khd thtic hiin. Bdi viit ndy trinh bdy

nhdng kit qud nghiin cUu ban ddu vi cdng nghi ddp thiiy tinh trong diiu kiin sdn xudt tqi Viit Nam.

ABSTRACT

Hydroforming - advance technology is a method for deep drawing of sheet using high pressure oflitpdd.

Based on many outstanding advantages such us increasing of deformation limit of material improving accu￾racy of product as well as surface quality reducing of costs for die manufacturing, this method is widely usii^^

many Industrial fields, especially In the automobile Industry, to producing of complicated parts from sheets and

tubes. This article presents the research results of this technology with considering of Vietnam's conditions

I.DATVANDE

Viec tao hinh chi tiet c6 chi^u sau dap vuot

ldn tii tam bang cong nghe truyen thong diigc

gi6i han bdi cac yeu to nhii: tinh deo vat lifu, ilng

suat chiy, ma sit giiia phoi vi dung cu,... cac yeu

to nay thong thucmg dugc danh gia bdi he so dam

vuot m. Khi dap cac chi tiet dang cau bing chiy

ciJng - coi Cling thong thudng kho khan bdi vi

phan ldn be mat cua phoi khdng bj ep bdi chiy

d giai doan bat dau dap vuot do dd chi tiet sau

khi djp de bi nhan va bien djng khong ddng deu.

Phuang phap dap tao hinh thuy tinh (hinh 1, 2)

li i p suat chSt cong tic se tac dung dtfu len be

mat ciia phdi, do dd chi tiet dap se bien dang dong

deu, nang suat cao. Cdng nghe niy ap dyng cho

cac chi lift ddi hdi do chinh xac cao vi ciu triic

dong nhat, hinh dang khdng gian phUc tap, ho?ic

vat Heu vdi tinh d^o tUdng ddi thap.

nguon: lUL, Dortinun

lio nguyen ly dap tliuy tinh chi tiel

CK" tru Iihung sii' dung doi ap

,f^

• ^

n — —

^

_ nguon: lUL, DdBK

Hinh 2: So dfi nguyen ly dap thuy tinh chi tiet

dang coc try co ddi ap

TAP CHl CO KHl VIETNAM • s a 5 (Thang 5 nam 2012)

m2012)