NGHIEN cCru - TRAO eOi KHAO SAT THLTC NGHIEM QUA T R I N H KHOAN MA SAT TREN MAY PHAY EXPERIMENTAL SURVEY FRICTION DRILLIMH PROCESS O N MILLING MACHINE Pham Quoc Hoing', Nguyen Tniemg An', Trin Cdng Hung", Nguyjn Hflu Quin' 'Hpc vien Ky thuit Quin s\( 'Tru6ng Dai hpc Cdng nghiep TP Ho Chi Minh T6M TAT Qud trinh khoan ma sdt chi tilt thdnh mdng chiu dnh hudng cia nhieu ihdng so, viec phin tich dexdc dinh dung cdc ylu to cdng nghi, cd dp lUc dgc true dnh hudng den chdt lUdng vd ning sudt khoan Id dieu cdn thilt vd quan trgng Bdi bdo trinh bdy kSt qud cda khdo sdt thUc nghiim thay thllUdngtiln dao bangcdch tri vd cSdinh dp lUc doc true khoan ma sdt thip cacbon Kit qud nghiin cdu chi rdng cd the khoan ma sdt trln mdy truyln thdng thay thl mdy CNC, md vh ddm bdo chdt lUifng ndng sudt gia cdng Tfl khoi: Khoan nhiit: Khodn ma sat: Khoan dinh hinh; Khoan chdy: Life ddy khoan ABSTRACT Friction dulling process for thin components is influenced by many parameters Ifs important to define the main criteria ofthe cutting conditum and the axial pressure affecting the quality and th h T l T"'"f "^- ^"^'P^'P''^^*^ "-^ residts af experimental investigatigns, the benefits of affecting of the maintenance the constant thrust friction when drilling carbon steel ^^J^Comj^ra^veanaysismodelthroughtherelevantfactorssuchassp^ mdchmes but ensuring quality and machining productivity Keyworfs: Frictwn drilling Thermal drill; Form drilU Flow drill: Flow punch ISSN 0S66-7056 TAP CHf CO KHi VI$T NAIM, Sd nam 2016 www.cokhivietnam.vn NGHieN CLfU - TRAO DOI I.DATVANDE hinh" (^^ m ' ' T ^ ^ ^ " " *"*' ^ ' ' ' " ^ " ^ ' ^ « ' " ( * " ™ ^ -Ml), "khoan dtah dung cu (mm khoan) va phdi lim cho trd liic bi& d ^ cua vat lieu giim, dudi tic dmig cua an toe len mui khoan se tao M tren tim kim loai, nhu l l hiln tren ^ ^ ^ ' -«-wyr^::*u7: Tren hinh 2, the hien ip lUc dpc trijc tuong flng vdi cic giai do|n Ap lUc Pz ting nhanh * giai d o ^ ban dau, miii khoan xim nhap vio v^t lieu gia cdng vi nhiet tao chua Idn (hinh W (b), (c) Ap luc dpc trvic d?t dmh miii khoan xim nhjp vao gan het chieu day phdi (hinh 2.d) Sau do, dien tich tifp xiic tang Ien Iim tang nhanh nhiet vit U^u bi mem di, chiy len phia trin dijng Of, ip luc giim xudng (hinh (e), ({) Ap luc se tang tr* 1?! phan vat liOu chay lOn phia tren dyng cii cd die htoh thinh cdio ong 16t, hojc bi cat ddt t,obem*tphangtrenph0i(hinh2(g, H!„I,,J„,,J _ ' " " " ' ^ " ' ^ ^ ' ^ ^ ^ *^'" do(?n ISSN 0866-7056 TAP CHi COKHi VlfiT NAM, Se7nam 2016 www.cokhivietnain.vn NGHieNCCfU-TRAOOOl Cdc nghien cCtu deu chi rang, lUc cat tang cao chu y^u lildng chay dao tang Day la dieu khdng i mong mudn gia cdng is:| cac chi tiet mdng, bdi | m '• nd cd the lam bien dang chi t i ^ can gia cdng De giam Iilc cat, can giam lilcfng chay dao din den nang suat gia cdng giam Gi3i phap dildc diia la thay ddi Iildi^ HUnh Chuang trinh CNC khoan ma sdt vdi cdc budc tiin dng vdi cdc dogn chu yeu chay dao theo tiing giai doan qua trinh khoan Dieu nay, chi thiic hi^n diidc tr^n may gia cdng s6 Nhi sin xuat dung cy khoan Flowdrill da di xuit giai phap niy the hi^n tren hinh Tuy nhien, d^ thiJc hi?n di^u can phii dau til thi6t bi may gia cdng ky thuat s6, ngoai ra, cin lap trinh gia cdng d^ thay doi ItiOng chay dao theo tiing giai doan Mye tieu cia nghien ciiu la thay vi gia cdng tren miy CNC, se gia cdng tr^n may truy&i thdng (khoan phay) Yi^c khdng ch^ li^c cat bang cich thay d6i lu^ng chay dao tr6n may CNC dd(?c thay the bang cich tri mdt ap lilc dpc true cd dinh khoan Ap lUc dii nhd de khdng lam hiin dang chi ti^t gia cdng Tuy theo trang thii nhiet dp ciia phdi vi ip l\ic dgc tr\ic, bildc ti^n se thay ddi theo V^T I i £ u VA THIET BI TH^C NGHI$M Qui trinh khio sat thilc nghiem dildc tien hanh gia cdng tren phdi la thep (f>30xl ,3 mm, vSt Ii?u Ii th^p cacbon thap CT38 cd cic phan hda hpc dildc thi hien d bing Vdi dung cu khoan M8(hhih4.) ^ • Bdng 1: Thdnh phdn hda hgc cua thip CT38 Mic th^p CT38 TCVN 1651-85 P(max) 0.40-0.65 0.04 4H ^^ Hinh Thdng so hinh hgc dung cu khoan ma sdt M8 (tpZS) ISSN 0866-7056 TAP CHl CO KHf VI$T NAM Sd nam 2016 www.cokhivietnam.vn S(maK) N G H I S N CCI-U - TRAO OOl thuc nghiem dupc Hen hanh tren hai giai doan: Gifli dogn I: ThUc nghiem kiem chiing, duae thuc hien tren may phay van ning Frejoth FVHM-6.000S, vdi tdc dp true chinh li 2.200, 2.500, 2.800 v/ph, budc Hen ian lupt la 50, 75, 100 mm/ph, SiS dui^ cim bien lUc CBSB-3.000 N, bp ludng khufch dai tin hieu KYOWA WGA 200A, bo mach MEGA Ardumo 2.560 giao tiep thu thap dtt lieu tfl thiet bi vl miy tinh thdng qua phin mem IVlatlab/Simulink Giai dogn 2: Thiic nghiem tri co dinh ip lUc dpc true bang each sij( dung mOt hai phuong in: Dit tai kieu ddi trpng vi sfl dung he thong nen the hien tren hinh Phuong in dat tii don gian, p h i hop vdi dieu kien gia cdng thac te, my nhien, nghiOn cflu sfl dvng md hmh he thdng nen dS dieu khiSn hnh hoat, dong thdi diuin lpi ket ndi vdi thiet bi cam bien lildng vi cam bien hanh trinh Md hmh thi i^hiem, diloc chi tren hinh Tifti hanh thl nghiem vdi tdc dO true chinh n=2.S00v/phut, Pz=1150N n ^^^^^^^^^# "''*'-OuytrldpIUcbandduPz:PhUgngdnlsddungdiilrgnsPhUdngdn2sddvngkhini„ I—^21 mnh Mdhinh hi thdng t^u khiln tri dp iUc bing nen vdgiag lilp kit xudt da lilu mdv Hnh •Mngquaphd„m(mUmigb/Simulinkvdigdlh6tn;chobomgchMEGAArduiT2560 ISSN 0866-7056 TAP CHi CO KHl V i t T NAM, SO nam 2016 www.colduvietnam.VB NGHIEN CU'U-TRAO OCl KET QUA VA T H A O LUAN Ket qua thilc nghiem kiem chiing d giai do?n 1, dilc^c th^hi^n tren hinh Ta thay, ip lilc ban dau tang dot ngdt sau dd giam, Iilc cat tang ldn Iilcfng chay dao tang, ddng thdi tdc dp tryc chinh khdng ddng vai trd viic tang giim i p lilc dpc true Di^u phii h^p vdi cic kit qui nghifin Cliu tnidc ^ _ , : _ —'" 7/1 Tf Th61^|Ueb^lCUCt2l»«a) Ill ,Th*l'iUnllicaM7i(Z20O-75l 1/ I I \ ThM flHi KtalA«^^ |U(i(hia»i / / 4IL1J ' —^ [ z™_7» i -f -Tfrnfl mffy^j^, noo.ioo L zl^ »» ^ lUftUlciJUijJ h— RE l * H - JJ00.7S ; % ^^-' - ^ r4-L -h i i p m 4M| ôã* " ^ ^ • l -te (HM n» - T - | 1 >ul MOpJ f\\ M0.1M L , ^ ll iJwiMilili L \^F^-ai^ - 1— 1-iJL , ''*?^!f>M •••^tM lOi (unb^q -T- "^ I- _ l j (It IKM.SO (IJ MOO.TS -f/jn V' "•""a^gjkt*!!! ?^ UOOITS) i l / l l t L "niM-t»n»«c6Hi Sl IKMMOpJ -» »^- — J - «»_» i lI'MltA I / / - "^njtowly T j t ^ ^ f—r ^T-^'^WvWft f i««_i«i L ^ j J ^ ™* i - -—— tfSfN^"ii^ - I ^ "'"'•'•^Pl'^I^^thipCT38:Wcddtrucchlnh(2.200,2.500,2.800v/fh)vdbUdctil„(SO,75.100mm/ph) ISSN 0866 7056 TAP CHl CO KHl VlfiT NAM, Sd nim 2016 www.cokhivietnani.vn NGHIEN CU'U - TRAO B | Ket qua thfle nghiem d giai doan 2, dupc thl hien tren hinh g Thdng qua biiu ta nhan thiy, vdi gii tri i p Iflc cd dinh v i tri, Iflc cit tang dan v i dn djnh (dfldng dd thi nam ngang) trd ve qua trinh khoan hoan tat, dong thdi sudt qui trinh gia cong budc tien dung cu thay ddi, thdi gian gia cdng dflflc nit ngin lam cho nang suat gia c o i ^ tang Ddi vdi thep