EN CUU-TRAO Dc: XAC DjNH THONG S6 CONG NGHE TAO HJNH KHI DAP THOY TINH CHI TI^T HiNH CAU DU^ONG KINH 50 MM TLT PHOI TAM DETERMINATION OF TECHNOLOGICAL PARAMETERS IN SHEET HYDRO FORMING PROCESS TO PRODUCE THE SPHERE PARTS WITH DIAMETER 50MM Le Trung Kiln, Pham Van Nghe Trfldng Dai hpc Bach Khoa Ha Ndi TOM TAT Cdng nghe sdn xudt tien tiin Id cd sd cua ngdnh Cong nghiep hien dai Cdng nghe dap thuy tinh (DTT) Id mdt hUdng nghien ciiu vd iing dung ngdnh Cdng nghiep sdn xudt did xe mdy Trong qud trinh ndy, chdy chdt long tdc dung len phoi tdm ldm biin dang theo hinh dang cua cdi Bdi bdo trinh hdy phuong phdp xdc dinh vd phdn tich tdc dpng cua cdc thdng s6 tao hinh quan trpng den khd ndng hinh thdnh chi tiit Cdc yiu to dnh hUdng din qud trinh tao hinh chi tiet dUpc xdc dinh qua viic nghidn ctiu trqng thdi Ung sudt, biin dang tai cdc vimg nguy hiim bdngphtiPngphdp mo phong so Cdc gid tri dinh lUpng thu dupc nhd md phong so dUPc cdi ddt qud trinh thiic nghiem nhdm xdc dinh mien ldm viec cda cdc thdng sd cdng nghe Thi nghiem dUpc tien hdnh trin ddng Latong A70 tdm ddy 0,8 mm Kit qud thiic nghiem se dUpc Ung dung de sdn xudt cdc chi tiet dang tdm co hinh dang phiic tap dUpc chat lUdng vd hieu qud Tfl khda: Ddp vudt; Dap th-dy tinh; FEM; Nhdn; Rach ABSTRACT Advanced manufacturing technology plays importantrole for moderning and developing of industry Hydro forming is a researching direction and new application in the automobile industry In this process, this fluid affects on the blank to deform it on the cavity of die This paper presents the methods to determine influences of some important parameters on the ability forming details The factors affect to the process details are determined by researching the stress, strain in the danger zone by numerical simulation The quantitative values obtained by numerical simulation are installed in the experimental work to determine the domain of the parameters The experiment was carried out by 0,8 mm thickness brass sheet (Latong A70) The reseach results will be applied to produce complex shaped products from sheet metal with quality and efficiency Keywords: Drawing, hydrostatic, FEM, wrinkle, crack TAP CHf CO KHf V I £ T NAM, Sd nam 2013 NGHIEN C U T U - T R A O D C I H I thdng thi nghiim dfldc xay dflng theo sd dd nhu hinh 2, dd bao gdm: l.DATVANDE Cdng nghe dap thuy tinh dfldc phat trien va Ung dung de khac phue nhflng nhupc diem cua cdng nghe dap vudt truyln thdng Muc dich nham tang mflc dap vudt, giam biln day, giam chi phi che t^o khudn, giam sd nguyin cdng Cdng nghe dap thuy tinh chi ddi hdi che tao long cdi cd hinh dang cua chi tilt - H I thdng cung cap chat long cao dp (1); - H I thdng chan (may ep - 2); - Khudn thfly tinh (3); - He thdng ddi dp (4); - He thdng thu thap vd xfl ly tin hieu (5) ch4t 0000 Kei ilmc Ngudn: [3] Ifinh Nguyen ly va qud trinh dap thuy tmh phoi tdm Hinh la nguyen ly va qua trinh hinh chi tilt dap thuy tinh phdi tdm Phdi dfldc biln dang theo bien dang coi vdi kha nang tao hinh tdt nhat Gidng nhU dap vudt truyen thdng, cac yeu td chinh dnh hudng din qud trinh tao hinh bao gdm: Hinh SO d6 hi thdng thi nghiem thuy tinh Ngudn chat ldng cao ap dfldc cung cdp bdi he thdng kich thuy liic kit hdp binh tich dp - Thdng sd cdng nghe: Ap suat can thilt de tao hinh, lUc chdn, lUc ddi dp; - Thdng sd hinh hpc: Ban kinh gdc Ifldn cdi, mflc dp phflc tap cua chi tiet; Hinh He thong tang dp cung cdp chdt long - Thdng sd vat lieu: Vat lieu phdi; - Ma sat gifla phdi vdi chan va coi; He thdng ddi ap cho khudn dUdc sfl dung mdy nen cung cap vao he thdng bao gdm xilanh nen dfldng kinh £|)50mm D l che tao cac chi tilt dam bao chat lUdng mong mudn, can thiet phai nghien cflu va xdc dinh cdc thdng sd tao hinh tien tdi xdy dflng mien Iam vile cua cac thdng sd cho cac dang san pham cd hinh dang phflc tap HE THONG VA VAT Ll£U NGHIEN CUXJ 2.1 Thilt k l h e thdng thi nghiem Hmh Khuon vd hi thong doi dp TAP CHi C O KHi VIET NAM, Sd nam 2013 NGHIEN CUTU-TRAO Ddi HI thdng chan dfldc sfl dung la mdy ep thfly lflc 125 tan cd the dilu chlnh dfldc ap suat chan va thdng sd bang he thdng va xfl ly tin hilu Hmh Hi thdng thi nghiim lap rdp hodn chinh Khudn thfly tinh dfldc thilt k l nham nghiin cflu eac thdng sd cd ban gia cdng chl tao chi tilt dang cau dfldng kinh D = 50 mm Bdngl: Tinh chdtvdtiieu dong Latong A70 369 MPa 128GPa 48GPa 140 GPa 0,34 Dd cflng theo thang Vickers Md dun Young Md dun cat Md dun nen He sd Poisson Bang thi nghiim keo nen theo hUdng Kit qua cho thay thdy quan he gifla flng sudt va biln dang theo hfldng gdn nhfl nhau, ta cd t h i eoi la vdt lieu dang hfldng tren cd sd dd md phdng sd vdi md hinh vdt heu dflpc dp dung vdi bai todn biln dang ngudi la md hinh deo tflc thdi tuyln tinh dang hfldng cfla Von Mises Tfl dd xdc dinh dfldc dfldng cong chay bang phfldng phdp thflc nghiem Hinh Hi thong, ket qua keo mau vat Ueu trin mdy MTS-809 Axial/Torsional Test System Hinh Khuon ddp thuy tinh: I Dekiiudndit3i:2 TAindem: Bul6ngMS;4.C6i-, T^m chin giodngi Khuon I 7, Dikhuoit tren, BuldngMS S.GiodngilO Bul6ngM4, I! (Mt ddi dp: 12 TSm day, 13 Bda v4; 14 Xilanh dSi dp ; ,.; ;" - -•••flw " I -flMwy 2.2 Vat lilu nghien cflu va thii nghiim Sfl dung vat lieu thi nghiem ddng Latong A70 vdi phdn va tinh chat nhfl sau : Hmh Do thi g««" bi itng sudt - bien dang cua vdt I'?" keo theo cdc hudng (f, 45" vd 90" so vdi hudng cdn Bdng 1: Thdnh phdn hoa hoc dong Latong A70: Thanh phSn hoa hpc dong Latong A70 (%) zinc Copper 30 70 SU" DUNG M PHONG SO DINH LU'ONG CAC T H O N G SO ANH HU'DNG TRONG D A P THUY TiNH Md phdng la mpt cdng cu rat hieu qua trong^ TAP CHf CO KHl V I £ T NAM, S6 nSm 2013 NGHIEN CUfU-TRAO D | viec giam thieu qua trinh gia cdng thfl Nd cho chung ta biet nhflng ket qua gan dung nhat thflc tl CJ day, nhdm nghien cflu sfl dung phan mim dl tien hanh md phdng cac trfldng hdp lan Ifldt cd dinh cac thdng sd de tim thdng sd cdn lai Ap suSt can thiet: 250 bar Lite chan: 60 kN San phim dat y6u cau Ap suit can thiet: 250 bar LUc chan: 65 kN San pham co dau hieu bi pha hiiy