NGHIEN cufu - TRAO D O I
/ N G H I E N CU'U, THIET KE VA CHE TAO MAY TIEN CNC PHUC VU OAO TAO
DESIGNING AND MANUFACORTING A MINI CNC LATHE MACHINE FOR TRAINING
TS. Le Thugng HiSn, IhS. Dang Thi Phitdng Lite Trudng Dai hgc Dien LUc
TOM TAT
ffng dung cdng nghe mdi ludn ludn Id nhu cdu cdp bdch ciia mgi nen sdn xudt vd moi qudc gia. Bdi bdo trinh bdy qud trinh thiet ke, che tgo mdy tien CNC phuc vu ddo tgo vdi muc dich ndng cao khd ndng ddo tgo cdng nghe mdi trong cdc trudng dgi hgc vd cao ddng, cdng nhu ddn ddn tiep can vdi cdng nghe cao trong qud trinh hda nhdp vdi nen cd khi the gidi
Tii khoa: CNC, mdy tien, ddo tgo.
Applying new technology is always the urgent demand of manufacturing industry of every country.This report presents the workflow of designing and manufactoring a mini CNC lathe machine for thepurpose to improve qualification of teaching new technology in universities,colkges and gradually
approach modern technology in the intergratingprocess with modern mechanics.
Keywords: CNC, Lathe, training.
ISSN 0866-7056
TAP CHf CO KHi VIET NAM, S6 11 nam 2014 www.cokhivietnam.vn
NGHIEN C U T U - T R A O D O I
1. M O DAU
May tien dieu k h i l n sd CNC da va dang dflpc sfl dtrng trong tat cac cac co sd san xuat, nghien cflu lien quan den co khi, xay dflng,...
Viec che tao may tien CNC de phuc vu
cho viec dao tao trong cac trfldng dai hpc, cao 3.1. Than may.
dang, d^y nghe nham muc dich trang hi cac may gia cdng dat tien nhap ngoai la can thiet va cap bach.
3. NGHIEN CtTU, THIET KE, CHE TAG VA LAP DAT
May tien CNC bao gdm ba bd phan chinh: Than may, tu di^u khien va phan mem dieu khien may.
2. TONG QUAN M A Y GLV C O N G
2.1. Pham vi lilng dung cua may
May tien CNC dflpc che tao trong nfldc phuc vu dao tao cd the dflpc sfl dung de thay the cac thiet bi dat tien nhap ngoai trong viec dao tao tay nghe cho cdng nhan hoac trong cac phdng thi nghiem cua cac tnidng dai hpc, cao dang.
2.2. Thong sd chinh cua may gia cong - Toe dp quay Idn nhat true chinh: 1000 v/p.
- Kich thfldc bao: 800 x 300 x 350 mm.
- Vat lieu gia cdng: Gd, mica va nhdm.
- Dien ap: 200V.
- Khdi Iflpng may: khoang 100 Kg.
- Dpng ca true chinh: 250 W.
- Ph&i mem dieu khien Mach 3.
Than may CNC bao gdm: Vitme dai dc bi, thanh dan hfldng, ddng cp true chinh, dpng CO bfldc va vd may.
Vd may: Vd may la ndi chiu tai trpng chinh cho toan bd may dflpc che tao tfl thep C45 de tang dp cflng vflng cho may CNC.
Ddng cp true chinh: True chinh trong may cdng cu ddng vai trd quan trpng trong qua trinh gia cdng vi nd cung cip tdc dp cat cho dao va la mpt phan cua chuoi truyen lflc gifla may cdng cu va dung cu hoac chi tiet.
Hmh 1. Md hinh mdy tien CNC thiet ke
Hmh 2. Bong cd true chinh Ddng cp true chinh cho may la ddng cP Sfl dung ddng co DC 24V- 14A - 250W-2600v/p.
He thdng thanh dan: He thong thanh trflpt dan hfldng cd nhiem vu dan hfldng cho cac chuyen dpng cua ban theo X, Y va chuyen ddng ISn xudng theo true Z cua true chinh. Yeu cau cua he thdng thanh trflcrt phai thang, cd kha nang chiu tai cao, cflng vflng tot, khdng cd
hien tfldng dinh, gpn khi trflcrt. "^
ISSN 0866 - 7056
TAP CHI CO KHI VIET NAM, Sd 11 nam 2014 www.cokhivietn am. V n
NGHIEN cufu - TRAO DOI
Hinh 3. He thong thanh ddn
3.2. Tu dieu khien.
Tu dieu khien dflpc cau thanh tfl cac bp phan chinh: Ngudn, mach drive dieu khien ddng ca, mach driver dieu khien true chinh va mjich giao tiep.
- Ngudn: Ngudn cua tii di6n la bd bien ap chinh Iflu dung d^ chuyen dien ap xoay chieu 220V xudng diep ap mpt chieu on dinh 24V. Dien ap mpt chieu nay cd nhiem vu nuoi cac mach driver dieu khien 3 true chinh cija may CNC.
Mach driver dieu khien ddng ca bfldc: De dieu khien dflpc ddng cP bfldc truyen chuyen ddng cho vitme bi thi ta can phai thiet ke 3 diver tfldng flng de dn dinh tin hi$u truyen, qua tim hieu va so sanh da Ifla chpn phfldng an thiet ke mach dieu khien la mach TB6560 vdi cac flu diem la gpn va dp chinh xac dilu khien c a o .
Sau khi thiet ke cac phan mach rieng biet, tich hdp thanh hop dieu khien chung cho san pham.
Hinh 4. Sd do nguyen l-y vd mach in he diiu khiin 3.3. Phan mem dieu khien
Hmh 5. Hop dieu khien ehung cua mdy CNC
Hi$n nay, cd nhieu phan mem dflpc thiet ke de sfl dung dieu khien chfldng trinh trong may CNC, tuy nhien. de phu hdp vdi tinh nang sfl dung cua may da che tao, da chpn phan min Mach3 lam phan m e m dieu khien dpng cd trong may CNC. Mach3 la phan mem cua hang ArtSoft, ban dau dfldc thiet ke danh cho nhflng ngfldi che tao may CNC tai nha theo sd thich nhflng da nhanh chdng trd thanh phan mim dieu khien linh boat trong cdng nghiep vdi cac
ISSN 0866 - 7056
TAP CHi CO KHI VIET NAM, S6 11 nam 2014 www.cokhivietnam.vn
NGHIEN cufu - TRAO D 6 |
tinh nang: Bien may tfnh ca nhan thanh mdt bp dieu khien may CNC 6 true; Cho phep import trflc tiep cac file dxf, bmp, jpg va hpgl thdng qua phan mem LazyCam; Hi^n thi G-code trflc quan; Tao file G-code thdng qua LazyCam hoac Wizards; Giao dien cd the tuy bien hoan toan theo y thich ngfldi sfl dung; Tuy bien M-code va Macro bang each sfl dung VBscript;
Dieu khien dfldc nhieu rdle ddng-cat.
Hinh 6. Giao dien phdn mim Mach3.
Chflc nang chinh cua phan mem Mach3 la npi suy tpa dp, giai ma xuat tin hieu xudng drive cac true va xuat tin hieu dieu khien di qua mach dam BOB.
Sau khi thiet ki, che tao va lap rap thanh san pham. Cho phep tien hanh gia cdng san pham thfle theo quy trinh cdng nghe cua cac chi tiet dflpc lap:
Hmh 7. Quy trinh congn^egia congchi tiet tren mdy tien CNC
4. KET LUAN
Nghien cflu, thiet ke va che tao thanh edng may tien CNC phuc vu dao tao cd the gia cdng cac chi tiet tien bang eae vat lieu: Nhdm, ddng, mika, ket qua da khang dinh dfldc viec flng dung ly thuyet dao tao vao thiic tien thiet ki, che tao hoan ehinh mdt thiet bi cdng nghe hien dai dang sfl dung trong va ngoai nfldc, dfldc thfle hien tai Trfldng Dai hoc Dien liic.
ISSN 0866 - 7056
TAP CHI CO KHI VIET NAM, Sd 11 nam 2014 www. colchivietn a m. vn
NGHIEN cflu - TRAO DOI
Hinh 8. Mdy tien CNC hodn ehinh
May tien CNC phuc vu dao tao dfldc ehe tao thanh cdng se m d ra hfldng mdi cho cac trfldng dai hpc, cao dang va cac cdng ty trong nfldc trong viec ehe tao cac may gia cdng tien tien phuc vu d^o tao va gia edng trong nfldc, han ch^ nhap ngoai. •
Ngay n h ^ hai: 19/10/2014 Ngay phan bien: 15/11/2014
TM li^u tham khao:
[1]. Nguyen Thi Ngpc Huyen (2012); Nghien cdu tuoi thg, do tin cdy cua dUdng ddn hUdng ma sdt ldn mdy cong cu CNC trin cd sd mon trong diiu kien khi hdu Viit Nam, Luan an Tien si Ky thu^t co khi, Trfldng Dai hpc Bach Khoa Ha Npi.
[2], Nguyen Tan Tien, Pham Hoang Long; Cdc loai truyin ddng trong ed khi, NXB. EChoa hoc Ky thudt (2010).
[3]. PMI ballspline catalog. Precision motion industries, INC.
[4]. Linear guideway technical information, Hiwin motion control and system technology.
[5]. Machine tools for high performance machining, LN.Lopez de Lacalle, A.Lamikiz.
[61. Website cua cac hang www.pmi-amt.com, www.Hiwin.com.
ISSN 0866 - 7056
TAP CHI CO KHf VIET NAM, Sd 11 nam 2014 www.cokhivietnam.vn
