NGHIEN cufu - TRAO 06\ PHAN TICK TfflET KE Hf THONG TAG MAU NHANH LOM DESIGN RAPID PROTOTYPING SYSTEM LOM ThS Pham Quang Thing, PGS, TS Thdi Thj Thu Ha Phdng Thi nghidm Trpng didm Qudc gia Didu khidn sd va Ky thudt He thdng TOM T A T Bdi bdo gidi thiiu vi cdng nghi LOM; tren ca sa phdn tich, so sdnh da Itfa chgn cdc phuang dn vd tiin hdnh tinh todn thiit ki mgt mdy LOM quy md cdng nghiip, ddng thdi tinh todn ung sudt vi chuyin vi mdy hdng phan mim Abaqus ABSTRACT This article presents LOM technology; on the basis of analysis, comparison has selected the alternatives design and conduct design calculations a LOM machine, and calculate the stresses cM displacements by computer software Abaqus GIOI THIEU CONG NGHE TAO MAU NHANH LOM K(*i«4B«lite Cdng nghd ddn theo lop LOM (Laminated Object Manufacturing), la mdt nhimg phuong phdp co bdn cua cdng nghe tao mlu nhanh, dupe sdng chd bdi Michael Feygin vdo nam 1985 vd dupe thupng mai hda vao ndm 1991 bdi cdng ty Hehsys •V»l|i Cdng nghe tao man nhanh ndi chung vd cdng nghe LOM ndi ridng dupe ling dung rdng rai de phdt tridn sdn phdm cua nhidu ngdnh cdng nghipp cung nhu trpng nhidu Iinh vuc khdc nhu Hinh Nguyen ly hogt ddng ciia mdy LOM CO khi, y hpc, an nmh qudc phdng, gido due dao tao, l.L Nguyen 1^ LOM: _ Do vay, vide nghien Clin sdn xudt mdy tao mau nhanh, md budc dau la mdy tao mdu nhanh theo cdng ngh? LOM la can thidt, gid tr; ddu tu nghien ciiu vd khd nang che tao phu hpp vdi di^u kidn hipn t,i d Vidt Nam TAP CHi CO KHl Vlf Nguyen If ldm vipc cua qud trinh tao miu nhanh LOM dupe thi hi?n tren hinh Ddu tt«n vdt lieu duoc dua vdo bdn may bdi cudn cdp li?u Sau dd Idn gia nhipt se ep vat Udu gidy vdo ban miy ^ p theo, dpng cu cdt (laser hoac dao) sedt Sd 10 (Thang 10 ndm 2012) NGHIEN CiAJ • TRAO DOt tim vat U^u tren iheo dudng bidn dang vd dudng - Hidu sudt bd tiiiyen: ca rd Nhu v|y, phin v$t hpu t?io mau sS dugc tgf '1' ir + />•) gifla l?i bdn may va phin v$t lipu thua sS dugc tg&^m cu^n l^i bdi cudn thu Chu k^ dugc ldp ^u - Cdng sudt ddng cd: cho ddn hodn thdnh sdn phim „ ^ F,v 476,48x0,01 2.TiNH T O A N T H I E T KE Hf THONG LOM 2.1 Ydu cau k^ thu^t Ap suat cho phep chpn [p] = 6Mpa, K = 0,85: he sd tinh den mdt mat cdng suat ma sat Sau can nhdc tham khdo cac may cdng - Chon vit me dai cd diidng kinh dl = 10 nghiep, chiing tdi de xuat cdc ddc tinh ydu cau ky mm, ps = nun thu^t cua may theo bdng 1: Bang tnigt din hudng: Bdng Dgc tinh ky thugt cua mdy - Tdi trpng thUc tUOng dildn] Cdc dac tinh ky thu|it Kich thudc may Thd tich Idm vide Dyng cii cdt diing ngudn laze C02 Toe dp cit tdi da Dd day cua t ^ gidy DO chinh xdc cua mdy Yeu cdu 800 X 600 X 650 mm 300 X 300 X 300 mm Cudng dp 50 MW 50mm/s 0,08-0,15 mm 0,02 mm = 2x10-5 m '^ 2x192 JTxOSB m 2x19237+500ar, „ „ ^ „ ^ - - , = 7584 tf L26(33 + 33 -f 57} Tudi thp cua bang triipt: t = ^ ) *10* » ( ^ g j ) xlO» « 0.28x10* Im 2.2 Cac cym truydn dQng D^a vdo nguydn ly boat dgng cua may LOM, cd the phan ciu trdc mdy ldm phdn: cym truyln ddng X-Y, cum ndng Im bdn mdy, cym c ^ va thu vdt Ii$u, cum lan nhidt (ep vdt li§u) Hinh 2: Truyin ddng theo phUcfng Y 2.3 Tmh tokn thik \ii Tryc dd giay: De dam bao mdy hoat ddng dap ung ydu cau ky thu^t, cac bp truydn ddng cd cdc thdng sd Theo bi^u dd moment thi tiet dien nguy sau: hilm nhat tai diem A BO truydn dOng vit me dai 6c: « At = 48,520C -> t^j = t^^ + At = 180,3 + 48,52 -228,55?^., 2.4 Tinh toan ung suat va chuyen vj mdy sii dung phan mem Abaqus: i ABAQUS la mgt bg phin mdm Idn diing de mo phdng cdng trinh dua tren phuong ph^ Q^ = oF (t^^-t^) = 10,6665 x (0,25 xnx 0,04) x (1 SO- phan tu huu ban, pham vi giai quyet van dd c u ^ SO) - 50,26 (W) tir phan tich tuyen tinh tuong ddi don gian ddnM (vdi a : he sd tda nhiet cua ldp ddng thau) de md phdng phi tuydn tinh phiic tap A B A Q ^ - Phuong trinh can bang nhiet: Q = Q,=Q,-50,26W (vdi QI: nhidt Iugng tda cua day didn trd vonfram) cd kho phan tu phong phii, cd the md phdng Wnli dang thuc td cua tat cd cac dang vdt lieu, dap ling dugc cac yeu can ky thudt ca hpc vdt ran, cfl hpc rdi rac, co hpc luu chat, didn, am hay nhiet - TAP C H i C O KHi V I | T NAAl • Sd 10 (Thdng 10 nam 2012) NGHIEN C I A J - TRAO eCl Pirni rai giay Hinh Ket cdu mdy tgo mdu nhanh LOM Hinh Tgo va chia heai mo hinh Abaqus Ket qua tinh toan va phan tieh md hinh: I link Bien dang theo phmmg Z TAP CHi CO KHi VIET NAM Hinh 10 (fngsudt *l* Sd 10 (Thang 10 nam 2012) ^ NGHliN CiJu - TRAO DOI Bdng 2: Ket qud phdn tich vet Thep Md dun dan hdi: E = 200xl0« Pa H? sd Poison: v = 0,3 Khdi lupng rieng: p = 7800 kg/m3 Nhom Md dun dan hdi: E = 75xlOô Pa HĐ sd Poison: v = 0,33 Khdi lupng rieng: p = 2700 kg/m= Luc tdc dyng theo phuong Ox Fj.,„.,= 43,144 (N) Van toe chuyen ddng theo phUofng Qx Luc tac dyng theo phucfng Oy VSn tdc chuydn ddng theo phucrng Oy Luc t^c dyng theo phuong Oz v ^ = 0,05 m/s Van tdc chuy6n dpng theo phuong Oz v„^ = 0,01 m/s Trpng lupng cum XY P „ = 192,37 N Trpng lupng cudn giiy Frt='«ON Tai chan may Ehrgc cd dinh theo cdc phuong bang cac buldng Ii$u Didu ki$ii bidn ban diu Phan tich bdng phan mdm Abaqus ''E(0,)='».992(N) V;,^ = 0,05 m/s FEm = t76.48N S ^ - (3,41-l,36)xl0-4 = 2,05xlO-f m 6y = ^ = (3,064-l,535)xl0-4= 1,529x10- a ^ ^ = 1,181x10+8 (N/m^) n S.KETLU^ Ngay nhjn bM: 25/9/2012 Ngay phan bien: 15/10/2012 Bai bao dS phan tich Iua chpn cac phuang NgwM phan Men: PGS.TS Dang VSn Nghin, an thidt kd va tinh tpan thidt kd cho mdt may LOM Vidn Ca hpc va Tin hpc U'ng dung quy md cdng nghipp Qua trinh phto tich he thing may t?ip mlu nhanh LOM bing phin mdm Abaqus vdi cac thdng sd diu vao da chpn cho kdt qua dap ling dupe yen eiu vd chinh xac cHa may cua mdy May t»c mlu nhanh LOM da dupe chd tap va dang trpng qua hinh 15p rap thii nghiem • TAP CHl CO KHl V I T NAM TM lieu tham khao: [l].PatentWO97/39903,WO99/598I2,WO99/349f [2] ABAQUS Standard 6.11, User's Manual, Hiblft Karlsson & Sorensen U.S.A [3] Nguyin Hlhi Lpc, Giiottinhco sd thi^t ke miy, NXB Dai hpc Qudc gia Tp Hd Chi Minh, 2011 [4] Hoang Dinh Tin - Biii Hai, Nhiet dpng hpc 1^ thuat vattuydnnhidt, NXB Dji hpc Qudc gia TP HJ Chi Minh, 2004 rnrrhano inn5m 9(1191 ... thidt kd va tinh tpan thidt kd cho mdt may LOM Vidn Ca hpc va Tin hpc U''ng dung quy md cdng nghipp Qua trinh phto tich he thing may t?ip mlu nhanh LOM bing phin mdm Abaqus vdi cac thdng sd diu... Sd 10 (Thdng 10 nam 2012) NGHIEN C I A J - TRAO eCl Pirni rai giay Hinh Ket cdu mdy tgo mdu nhanh LOM Hinh Tgo va chia heai mo hinh Abaqus Ket qua tinh toan va phan tieh md hinh: I link Bien... sd diu vao da chpn cho kdt qua dap ling dupe yen eiu vd chinh xac cHa may cua mdy May t»c mlu nhanh LOM da dupe chd tap va dang trpng qua hinh 15p rap thii nghiem • TAP CHl CO KHl V I T NAM TM