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NGHIEN ClJfU-TRAODCl ; ' ^

-V

RESEARCH ON THE HYDROSTATIC FORMING

TO PRODUCE COMPLEX SHEET PARTS IN CARS

NGHIEN cu r CONG NGHE DAP THUY TINH DE TAO HINH CHI TIET

PHLTC TAP TRONG XE OTO

^ , ^ Dinh Van DuyS Tran Anh Quan'

NguVen Thi Thu\ Nguyen Dac TrungS Le Trung Kien^

' Industrial Machinery and Instruments Holding (IMI Holding)

^Hanoi University of Science and Technology, Department of Metal forming

ABSTRACT

f/^^ in the automobile manifacturing industry, most of sheet parts in the body of cars are

f' complex. Moreover, the preciseland qualitv of their shape, geometry and durability have to be

warranted during manufacturing. Therefore, it is difficult to deform them by common methods,

such as forming with solid punch and dia pr with rubber punch or with rubber die. One of the

most advance methods, which drew the'interest of researchers recently and was applied to

produce the complex sheet parts, is the hydrostatic forming. By using the high pressure of liquid,

hydrostatic forming makes the part deform easier and increase the quality of its surface.

However, in Vietnam, this method is smlllnew, so it hceven't been applied widely yet. The authors

built the model for center pillar - a part to link two dqors in a car- and researched the influence

of parameters of hydrostatic fprming on the quality of this part. This paper shows the simulation

result of this research with Dpnaforrn an^ setting empirical model.

Keywords: Hydrostatic forming, sheet metpl forming, hydo-forming.

^T6MTA T \y I,

Trong cdng nghiep sdn xudt oto, hdu f^et cdc chi tiit cua vo xe deu co dgng tdm phuc tgp

vd cdn dugc ddm bdo ve hinh ddng, cMt lugng vd dp bin trong qud trinh che tgo. Do do, viec

tgo hinh chimg khd kho khdn doi v&i/dcpfiuang phdp thong thu&ng nhu sic dung chdy cimg, coi

cung hay su dung cdc loai chdy hggac&i bang cao su. Mpt trong nhicng phuang phdp tiin tien

dang dugc quan tdm nghien cicu ya miugc su dung de che tgo chi tiet vo mong phuc tgp Id cong

nghi dap thuy tinh. V&i viec siefiunsap sudt chdt long cao, dap thuy tinh giup phoi de biin dgng

vd tdng chdt lugng bi mat sdn phdm. Tuy nhien, a Viet Nam, phuang phdp ndy cdn khd m&i vd

chua dugc ung dung rpng rfii Nmm tdc gid dd xdy dung mo hinh cho chi tiit ndi cdnh cua 6 to

vd tiin hdnh nghien ciru dnhmmng cua cdc thong sd cong nghe dap thiiy tinh t&i chdt lugng cua

sdn phdm. Bdi bdo nay trinb^boy ket qud nghien cuu bdng mo phong sd v&i phdn mim Dynaform

vd mo hinh hi thong thicc hmiim cong nghe ndy.

Tir khda: Dap thuy tinh, tgo hinh thuy luc, tgo hinh vdt lieu tdm.

i /

ISSN 0866 - 7056

TAP CHi CO KHf VIET NAM, S6 1+2 nam 2015

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