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NGHIEN CLCU-TRAO DOI ANH HI ONG CL A DO CUNG CAN DAO TIEN DEN CHAT LUONG BE MAT TIEN TRU EFFECT OF THE TOOL HARDNESS ON THE SURFACE QUALITY OF TURNING PROCESS Pham Son Minh' D6 Thanh Trung', H6 Ngoc The Q u a n g ' , Phan T h e N h a n ' Nguyen Thanh Giang', Bui The Phong' 'Truimg Dai hpc Su pham Ky thuat TP H6 Chi Minh -Truimg Cao ding nghS Ky thuat Cong nghe TP Ho Chi Minh TOM T A T Trong nghien ciht ndy, cdc cdn dao lien vdi cirng khac duoc sir dung qua iriiih lien mi Trong qud trinh time nghiem, thong so cdt got duac giir co dinh cho cdc logi thep CIO, C30 vd C45 Qud trinh dao dong cua cdn dao lien duac ghi nhgn thong qua cam bien goc Ket qud thirc nghiem cho thdy vdi thep CIO, bong chi tie! se duac cdi Ihien sir dung cdn dao cd cimg cao han Ngiroc lai, vdi Iheo C30 vd C45, cdn dao co ciriig 50 HRC se cho ket qud tot nhdt ve dd bdng Kel qud do bdng khd phit hap vai ket qud vi' dao dong goc ciia cdn dao Tir khoa: Gia cong kim logi, cdng nghe lien, cdn dao li^n, dd nhdm, dao dong VBSTR\( I In this research, the turning tools with different hardness will he used for the cylindrical turning process By e.vperimenl the cuning paramenlers nil! befitted ii illi the work piece's materials as CIO C30 and €45 The vibration of the turning tool will be collected by the angle sensor With the CIO steel, the experiment result shows that the glo.ts of the product will be belter with the harder tooling However, with the steel of €30 and €45, the 50 HRC tooling show the besi gloss of product The gloss remit got a good agreement with the vibration result Keywords: Metal culling, turning process, tool for turning, roughness, ISSN 0866 - 7056 TAP CHf CO KHi VIET NAM, S6 nam 2016 ^^ww'.cokhivietnam.vn vibration l>tV.7l lll_IX \^\J I-/ l.GiaiTHIEL CHING Nga> nay, trinh san xuat dugc tu ddng hda d mire cao, cae ITnh vuc cdng nghd hidn dai dugc to hgp vdi de hinh mgt cdng nghd mdi cao han nhu td chiic ca khi, didn didn lu tin hgc, thi khoa hgc gia cdng vat lieu da cd nhCmg budc phat tnen mdi Mdt nhung minh chimg rd nhat la vide gia cdng vat lieu san xuat td hgp didu khidn bang may vi tinh CAD/CAM CNC da dem lai hieu qua kinh te va cai thien dugc chat lugng bd mat chi tidt [1-3], Vdi su tidn bd cua khoa hgc ky thuat, su biing nd thdng tin khien cho cdng nghd cao trd cudc each mang thdi dai vdi cac loai may tien hien dai may td hgp, may didu khidn theo chuang trinh Nhung bat ky mdt phuang an cdng nghe, phuang an kdt cau, phuang an tu dgng hda qua trinh gia cdng, hay mgt phuang an td chirc iam \ icc nao ddu phai dugc danh gia trdn quan didm hieu qua kinh tc va chat lugng san pham [4] Chat lugng be mat ciia chi tidt bi anh hudng bdi cac ydu td: He thdng cdng nghe [5], cac ydu td ngoai canh, vat lieu [6], tudi ngudi [7] Ngoai ra, cdng nghd cang cd s^r thay ddi dang kd vd ca dao, may gia cdng va vat lieu gia cdng Khi dd cap den chat lugng gia cdng, khdng the khdng dd cap ddn bdng bd mat mat chi liet \ a nham la chi tidu dd danh gia didu [8] Den thdi didm hidn lai, da cd kha nhieu nghien cuu \ c anh hudng cac phuong phap cat ggt thdng sd cat ggt, he thdng cdng nghd, ddn nham bd m^t qua trinh gia cdng trdn may van nang, cung nhu may CNC [2-4] Tu\ nhidn \ lec nghien cuu cimg ciia can dao tien anh hudng den bdng be mat san pham (mdt cdng nghd mdi gia cong cat ggt) thi chua cd cdng trinh nao nghidn cuu chuyen sau cdng nghd chua dugc phd bien d \iet Nam PHUONG PH.XPTHI NGHIEM Trong nghidn cuu nay, mo hinh thi nghiem can dao tidn nhu Hinh se dugc sir dung cho qua trinh nghien cuu anh hudng ciia Cling can dao ddn bdng bd mat san pham udn Trdn than can dao tidn, cam bidn dao ddng ciia gde chuydn \ j se dugc gdn tai \i tri nhu Hinh Cam bien nay, se cung cap du lien \d dao ddng gde theo phuang: dP, dR va dY (Hinh 2) Trong dd, dao ddng goc theo phuang dP chii yeu dugc ga\ bdi luc cat chinh Qua qua trinh thgc nghidm gia tri gde dP thay ddi kha rd vdi cac thdng sd cat khac Vi vay bai bao nay, gia tn dao dgng theo phuang dP se dugc sir dung so sanh cac trudng hgp gia cdng khac Phuc vu cho qua trinh thi nghidm, qui trinh tien tru be mat chi tiet cd dudng kinh 48mm vdi chidu dai tidn 90 mm Phdi tidn se dugc tidn hanh thuc nghidm vdi loai vat lieu: Thep CIO C30 va C45 Qua trinh gia cdng tidn tru ngoai dugc thuc hidn vdi chidu sau cat t ^ 0.5mm, tdc dg qua\ ciia true chinh n = 800 vdng/phiit va budc tidn dao F = 0.1 mm/vdng trdn may lien CNC ITmh \f hinh thi nghiem dao dong cua cdn dao tien ISSN 0866-7056 TAP CHi CO KHi VIET NAM Sd nam 2016 wwM.cokhi\ ietnam.\ n NGHIEN CLfU - TRAO 001 y PH.AN TICH KKT QL \ THI N« Hinh Goc dao dong cua cdn dao Ngoai ra, can dao tidn se dugc lidn hanh che tao va nhiet lu>cn de dat cac mire cung khac thay ddi tir 40 ddn 60 HRC Trong qua trinh thi nghidm, cac can dao vdi cac ciing khac se dugc sir dung Trong qua trinh gia cdng gde dao ddng ciia can dao theo phuang dP sc dugc thu thap Sau dd dg nham bd mat eiia san pham lien se dugc tien hanh sdi thidt bj dg nham Mitutoyo SJ-301 Qua trinh thu thap kdt qua \c nham bd mat dugc tien hanh vdi lan tren mau Mdi trudng hgp cat img vdi cung can dao khac sc dugc tidn hanh trdn 10 mau Dao dgng ciia can dao dugc thu lh$p thdng qua cam bidn img vdi 10 mau gia cdng cho moi trudng hgp Hinh Qud trinh dp nhdm cua mdy Surftesi SJ-301 1IM Trong nghidn cuu cac can dao tidn cd cung thay ddi tir 40 ddn 60 HRC se dugc tidn hanh thi nghidm Sau dd, gia tri do nham be mat \ a dao dgng goc ciia can dao dugc lien hanh thu thap nhu Bang Nham nghidn cuu anh hudng ciia cimg can dao den dao dgng cua dao qua trinh gia cdng tat ca cac trudng hgp cat ggt dugc tidn hanh cat vdi chieu sau cat t= 0.5mm , tdc dg quay ciia true chinh n = 800 \6ngphLii va budc tidn dao F = 0.1 mm/ vdng Cac kdt qua \e nham va goc dao ddng ciia can dao dugc so sanh nhu Hinh va Kdt qua thuc nghidm cho thav, vdi thep CIO, can dao cd dg ciing cang cao thi nham cang giam (Hinh 4) Didu cd thd giai thich bdi kha nSng cimg vimg ciia CO he Vdi can dao cang cimg, cimg vCmg ciia he thdng cat ggt se tdt han, kdt qua la dao dgng ciia co he se giam (Hinh 5), tao didu kien lang bdng ciia chi tidt sau gia cdng Qua qua trinh thuc nghiem vdi thep CIO, tang cumg can dao tir 40 HRC Idn 60 HRC, nhap nhd bd mat giam tir 25.9 |im xudng 16.85 ^im, tuang ty, dao ddng ciia can dao theo phuang dP (Hinh 2) cung giam tir 0.12906" xudng 0.054442" Khi cat vdi thep C30 va C45, kdt qua thuc nghidm cho thay, cd su khac biet so vdi thep CIO Khi thay ddi cimg can dao tir 40 HRC ddn 50 HRC, nham can dao sg giam Tuy nhidn, tidp tu tang cimg can dao Idn hon 50 HRC, AQ nhSp nhd bd mat se tang theo (Hinh 4) Hi?n tuang nay, cd the dugc giai thich dya vao anh hudng ISSN 0866 - 7056 TAP CHi CO KHi VIET NAM Sd nam 2016 WT\w.cokhivictnam.vn NGHIEN CU-U-TRAO 001 ciia tan so ridng ciia he thdng cat ggt Khi tang cimg tir 40 HRC den 50 HRC, he thdng sc dn dinh hem, nhidn, tidp tuc tang Cling ciia can dao, lin sd dao ddng ciia he sd lidm can vdi tan sd rieng, dd bidn dao ddng cd khuynh hudng gia lang Ket qua thi nghidm cho thav gia tri gde chuydn \i ciia dao phan anh diing \di giai thich trdn (Hinh 5) Bdng I Ktjr qud thirc nghiem DO cirng The] CIO can dao (HRC) Goc dao dpngdPC) 40 45 Th> C30 Thep C Do nham dim) Goc dao doiigdPD 0»n)^ Goc dao dpngdPO 0.129061 25.9 0.1073765 26.96 0.1051305 0.073154 25.99 090712 50 0.0561715 22 54 0.080539 20.63 0.0530855 55 0.061456 18.2 0.07531(15 26.61 60 0.054442 16 85 0.07193 30.6 Do nham O.OS73S3 Do nham J^jn) 23.96 0.067219 0.0577155 , T h i p CIO Th*pC30 Hinh 4nh hudng cua Jo cirng cdn dao den dd nhdm be mat qud trinh tien tru A KET 1.1 AN Qua qua trinh thi nghidm va kidm thuc te phuang phap tidn tru iron vdi cac can dao cd ciing thay ddi tir 40 HRC ddn 60 HRC da dugc lien hanh nghidn ciiu Qua qua trinh phan tich cac gia tri nham chi tidt \a goc dao dgng ciia can dao eac kdt lu^n sau dugc nil ra: Hinh Anh hudng cua dd cimg cdn dao den dao ddng cua i an dao qud trinh ti^n Iru - Khi gia cong vdi cung thong sd cat ggt, vdi vat lieu thep CIO, cimg can dao cang cao dn dinh cua ca he cang tdt va bdng cua san pham sd tang - Vdi cac thdng sd cat ggt nhu thep CIO, nhung Cmg dung cho thep C30 va C 45 hidn lugng cgng hudng lai tan sd ridng ciia he da xuat hien Vdi trudng hgp nay, gia tri dg cimg can dao la 50 HRC, eho kdt qua "' ISSN 0866 - 7056 TAP CHi CO KHi VIET NA.M, Sd nSm 2016 H ww.cokhivietnam.v n NGHIEN CLfU - TRAO OOl tdt nhat vd bdng san pham ciing nhu gde dao ddng ciia can dao se nhd nhat.* Ngay nhan bai: 15/8/2016 Nga> phan bidn: 12/9/2016 Tai lieu tham khao: [1] [2] [3] Dr Oguzhan YILMAZ Cutting Tool Materials and Cutting Fluids Application guide - San\ ik Coromant 2000 Meiacutting Technical guide, turning - milling - drilling - boring - toolholding handbook from sandvik coromant [4] Metalworking Products Turning tools • Sanvik Coromant, 2000 [5] George Schneider - Cutting tool Applications [6] John Moriarty - Application of high-rate cutting tools - Manufacturing Methods - Technology Project - March 1989 [7] J Kopac, Advanced tool materials for high-speed machining [8] Mechanical Engineering, University of Ljubljana Slovenia ISSN 0866-7056 TAP CHi CO KHi VIET NAM, So nam 2016 www.cokhivielnam.vn ... phan tich cac gia tri nham chi tidt \a goc dao dgng ciia can dao eac kdt lu^n sau dugc nil ra: Hinh Anh hudng cua dd cimg cdn dao den dao ddng cua i an dao qud trinh ti^n Iru - Khi gia cong vdi... Hinh Goc dao dong cua cdn dao Ngoai ra, can dao tidn se dugc lidn hanh che tao va nhiet lu>cn de dat cac mire cung khac thay ddi tir 40 ddn 60 HRC Trong qua trinh thi nghidm, cac can dao vdi cac... cimg can dao den dao dgng cua dao qua trinh gia cdng tat ca cac trudng hgp cat ggt dugc tidn hanh cat vdi chieu sau cat t= 0.5mm , tdc dg quay ciia true chinh n = 800 \6ngphLii va budc tidn dao F