Cdng nghiep rirng
JXAC LAP THONG SO CONG NGHE GIA CONG VAT LI$U GO TREN MAY CNC MA HBfU SHDILINE 2010
Hoang Vidt
TS. Trudng Dgi hgc Ldm nghiep TOM TAT
Bai viet trinh bay ket qua n ^ e n ciiu xac lap cac thong so cong ngh? gia cong go tren may CNC ma hieu Sherline 2010 hi?n dang dugc sii dung tai tnmg tam thirc hanh Khoa Co di?n & Cong trinh. Kit qua n^ien cuu thurc nghiem da xac dinh cac phirong trinh toan hoc bieu th) anh hu6ng ci^a ba thong s6 co ban thuoc ch£ d$ cat la van tdc cat 5, van tdc day F, chieu sau cat t tdi dac trung chat luong gia cdng [diay ranh cd bien d^ng phiic tap tren miu go nhd la sai sd be r$ng ranh AB, dp xo sudc T va dp chay b^ m^ gia cong R. Qi th€, khi chieu sau c5t r = 1 mm: AB, = 1,039 - 0,024S + 6,25.10V - 5,33.10''F - 4,5.10"*SF + 1,4.10''F^; Ta = 8,524 + 0,1395S - 3,499.10'^S- - 6,02.10"-F - 4,15.10-^FS + 1,576.10V; R; = 2,796 - 4,99.10''S + 2,437.10"'S- 1,521F-2,65.10'*FS +2,959. lO'^F^. Tir co sd dd xac dinh cac thdng sd cdng nghe gja cdng hgp ly khi sii dyng may CNC ma hieu Sherline 2010 de th\rc hanh gia cong vat lieu go; S = 26 m/phiit, F = 320 - 335 mm/ph va I = I mm. K^ qua nay cung cd the ap dung hieu qua tren cac may va thiet bi CNC khac co nhGng dac tinh ky thuat tucmg drag vdi cac may CNC ma hieu Sherline 2010.
Tirkhoa: Anh hudng, bieu dien, che dp cdt, chdy bi mat, may CNC Sherline, xo su&c I. DAT VAN DE
Cac may CNC ma hidu Sherline 2010 tai tnmg tam thuc hanh Khoa Co didn & Cdng tiinh la thiet bi chuyen dirng phuc vu dao tao nganh ky thuat co khi. Trdn may cd thd dung mui khoan de gia cdng Id, dung dao phay hinh try &e gia cdng mat phing, dung dao phay dinh hinh gia cdng mat dinh hinh, dao phay ngdn de t^o ranh. Trong ITnh vuc didu khidn hpc ky thu|t, ve bdn chat, cac thiet bi dieu khien so ndu trdn cd nhieu diem chung vdi cac mdy CNC gia cdng go va cd thd van dyng linh hoat Cie phuc vu dao tgo ky su nganh chd bidn Idm san. Tuy nhidn, van de quan trgng can gidi quyet chinh la phai lira chgn cdng cu cdt va xac dinh cdc thdng so cdng nghe gia cdng sao cho phu hgp vdi ddi tugng gia cdng la go vd vat li^u tii gd.
Nghien cuu qua trinh gia cdng vdt lieu gd trdn cac mdy CNC ma hidu Sherlme 2010 vdi vi?c xac dinh dugc tuong quan dinh lugng giiia chdt lugng gia cdng vdi cac yeu td ca bdn thugc che do cat la co sd dd xdy dung cdc bai th\rc hdnh vd liiih vuc cdng nghd CNC gia cdng go. Sinh vidn ngdnh Che bidn lam san cd
dugc ky ndng co ban khi tidp can vdi mdy gia cdng CNC, gdp phan nang cao chat lugng dao tao, nghidn ciiu khoa hgc ciing nhu ndng cao hieu qud su dung trang thiet bi phuc vu ddo tao ciia Nhd trudng.
IlNQIDUNGVAPHUiDffVG PHAP NGHIEN c u t 2.1. Ndi dung, doi tirong va nguyen, vat lieu nghidn ciru
- Nhiing npi dung nghien cuu chinh bao gdm: Khdo sat nguyen Iy hoat dgng, cau t?o va he thdng dieu khien ciia mdy CNC ma hieu Sherline 2010, khdo sdt cdng nghd va thiet bi gia cdng go CNC tai mgt sd doanh nghidp sdn xuat; Co sd khoa hoc ve s\r tac dpng tuong h5 giua cdc ydu td co ban cua chd do cat vdi cac ddc tnmg chat lugng gia cdng phay; Nghien ciiu thuc nghidm xac dinh tuong quan giiia sai so kich thudc, dp xo sudc va dg chdy bd mat gia cdng tren may vdi cdc ydu to ca bdn thugc chd do cat lam co sd danh gia va dd xuat che do gia cdng hgp ly phuc vu xac lap ngi dung thuc hdnh cdng nghd va thidt bi CNC trong liiih vuc gia cdng vat Hdu gd tren may Sherhne2010.
96 TAP CHI KHOA HOC VA CONG NGHE LAM NGHIEP S 6 2-2015
Cdng nghiep rirng - Go de gia cdng Id cdc thanh gd Huong
(dang mdu nhd), tmdc khi dua vdo gia cdng chiing dugc sdy dd dat dg dm trung binh 12%;
Thidt bi nghien ciiu trong gia cdng Id may phay CNC ma hidu Sherlme 2010, th^rc nghidm tidn hanh tai Trung tdm thuc hdnh Khoa Co didn &
Cdng trinh, trudng Dai hgc Ldm nghiep.
- Cdc thdng so didu khidn: Cdc thdng sd ca bdn nhat ciia chd dg gia cdng tren mdy la van toe cat S, van tdc day F va chidu sau cat /.
- Cac ham muc tieu: Cdc dac tnmg ciia chat lugng gia cdng tao ranh phay Id sai sd kich thudc, do xo sudc va chay bd mat.
2.2. Phirong phap nghien cihi
- Phuang phdp ke thira: Tham khdo tai lieu, phdn tich lya chpn, sii dung cac ket qud da dugc nghidn cuu tren thd gidi va trong nudc cd lidn quan phuc vu giai quyet ndi dung thuc nghiem, nhan xet danh gia kdt qud.
- Phuong phdp thuc nghiim: dugc sii dung la quy hoach th\rc nghi?m don va da yeu td dd gjai quyet cdc ngi dung nghidn ciiu thuc nghidm.
Trong sd cac phuong an quy hoach bac hai nhu phuong an Keeferi J, phuang dn true giao, ke hoach trung tam hop thdnh. Box Wilson, phuong an H.O. Hartley, tac gia chpn phuang
an H.O- Hartley v\ day la phuang an ddi hdi sd lugng tbi nghidm tuong ddi it ma van dat do tin cay bao dam. Trdn co sd ly thuydt quy hoach thuc nghidm, dd tai nay dp dung kd hoach thuc nghidm trung tam hgp thanh tryc giao vdi cac ydu td day du dd xac dinh sy dnh hudng ciia cdc ydu td van tdc cat va van tdc ddy va su dnh hudng ciia chiing den sai sd kich thudc, cac tinh chdt ciia m^t gia cdng nhu vet siit, sudc, didn tich chdy. Xu ly sd hdu thi nghiem xac dinh cac tuong quan todn hgc bang phdn mem Excel va chuang trinh xir ly sd lieu da yeu td OPT trdn may vi tinh.
ffl. K I T QUANGHIEN C U X J V A T H A O L U A N 3.1. Anh hirdng cua van t^c c^t S, v§in toe day F tdi sai so Rich thirdc AB
u. Anh hudng cua vgn tdc cat S, van tdc day F tdi sai sd kich thuac AB; khi chiiu sdu cdt t = 0.5 mm
- Phuong trinh hdi quy md ta tuang quan dnh hudng;
ABl = 0,720 - 1,38.10-23 + 3,125.10^82 -3,98.10-3F-3,0.I0-5SF+ 1,08.10-5F2 (1) - Dd thi bidu didn tuang quan giira van tdc cat vd van tdc day vdi sai sd kich thudc ABI dugc xay dyng nhu trdn hinh 1.
\ ' u n (oc ft j i , mm/pb
Hlnh 1. Do thf biiu dien mdi quan he giira van tdc cdt, vgn tdc day vdi sai sd kick tku&c sdnpkdm khi ckieu sau cdt t = O.Smm TAP CHI KHOA H Q C VA CONG NGHE LAM NGHIEP SO 2-2015
Cdng nghiep rung
b. Anh hu&ng ctia van tdc cdt S, van toe ddy F AB2 = 1,039 - 0,024S + 6,25.10-432 tdi sai sd kich thudc AB2 khi chiiu sdu cdt t = 5,33.10-3 F - 4,5.10-5SF + 1,4.I0-5F2 (2) iOmm E)5 thj \y\^ j j | j j tuong quan giua v^n toe - Phuong trinh hdi quy md td tuong quan cat vd van tdc ddy vdi sai sd kich thudc AB2 anh hudng: nhu hinh 2.
250 300 3S0
Van 16c <la>, nini/|>h
Hinh 2. Dd thj bieu dien mdi quan hg giira van toe cdt, van tdc day vm sai so kich thudc sdn pham khi ckieu sdu cdt t =1.0mm
u. Anh hu&ng ciia vgn tdc cdt S. van ldc day F AB3 = - 0,3807 + 0,0i3S - 4,375.10^8^ + tai sai sd kich thuac ABj khi chieu sdu cdt t = 2,35.I0"^F - I,5.I0"^SF - 7,99. 1 0 ' ' F ^ (3) l-5mm - Do thi bidu didn tuong quan giiia van tdc
- Phuang trinh hdi quy md td tuang quan cdt va van tdc ddy vdi sai sd kich thudc AB3 dnh hudng: nhu hinh 3.
\ ' a n toe tlay, ituit/ph
Hinh 3. Dd thi bieu dien mdi quan kg giira van toe cdt, van toe day vdi sai sd kich thudc sdn phdm khi chieu sau cdt t =I.5mm
98 TAP CHI KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015
Cdng nghigp rirng N14n xet chung: Van toe cdt, van tdc ddy va
chieu sdu cdt cd dnh hudng ldn tdi do chinh xac hinh hgc san pham gia cdng, qua cac sd ligu thyc nghidm va do thi trdn cdc hinh 1; 2; 3 ta cd thd nhdn thdy sai sd kich thudc san phdm ty Id thuan vdi van tdc day vd ty Id nghich vdi van tdc cat, tuy nhien cac quy luat ndy la phi tuyen. Sai sd kich thudc san phdm tang ldn khi chidu sau cat t tang tCr 0.5 - 1 5mm, chieu sdu cat cang Idn thi sai sd kich thudc san phdm cdng Idn.
Dieu do dugc gidi thich nhu sau: Khi van tdc cat tang Idn do khdi lugng cat ggt khong ddi, qua trinh thuc hidn cat ggt vdi mgt lugng phoi nhd lam cho chat lugng mat gia cdng cao, sai so kich thudc nhd. Khi tang van tdc day, tuong ling khi do lugng cdt ggt ldn han (chieu day phoi ldn), Iyc tdc ddng ciia go len Iudi cat tang cao dan den miic dp dao ddng ciia he
thong "may - ludi phay - phdi" tang vd hdu qud Id ldm cho sai sd kich thudc sdn phdm tang IdrL Cung tuong tu nhu vay khi chieu sau cat ldn ban lugng phoi cat se Idn hon, Iuc tac dung Idn dao cdt tang len Iam gidm dg dn dinh ciia he thdng, do dd sai sd kich thudc san pham gia cdng bien ddi nhu da trinh bay.
3.2. Anh hirdng cua van the cdt S, van toe day F tdi dg x o sirdc ranh phay
a. Anh hu&ng dia van tdc cdt S, van tdc day F t&i do xa su&c rdnh phay Ti khi chiiu sdu cdt t
= O.Smm
- Phucmg trinh hdi quy md ta tuong quan dnh hudng:
Tl = 32,376 - I,207S + 1,95.10-2 S2 - 0,1347F + 7,85.10-4 SF + 2,5.10^ F2 (4) - Dd thi bieu dien tuong quan giiia van tdc cat va van tdc day vdi dp xo sudc ranh phay Tl nhu hinh 4.
Van tDc day, mm/pb
Hinh 4. Do tki biiu diin moi quan ke giu-a vgn tdc cdt, van tdc ddy vdi dp xaxudc rdnkphay khi chieu sdu cdt t =0.5mm
b. Anh hu&ng aia van toe cdt S, van tdc ddy F - Dd thi bidu didn nrong quan giua van tdc tai dg xa su&c rdnh phay T2 khi chiiu sdu cdt t cdt vd van tdc ddy vdi dp xo sudc ranh phay
= l.Omm T2 nhu hinh 5.
- Phuong trinh hdi quy md ta tuong quan:
T2 = 8,524 + 0,1395S - 3,499.I0-3S2 - 6,02.I0-2F-4,15.10^FS+I,576.10-4F2 (5)
TAP CHI KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015 99
Cdng nghiep rung
c. Anh hu&ng cda van toe cdt S, van toe day F t&i dg xa su&c rdnh phay 7> khi chiiu sdu cdt t
= 1.5mm
- Phuang trinh hdi quy mo ta tuong quan:
T3 = 17,26 - 0,4027.S + 5,875.10-3S2 - 7,583.10- 2F-4,999.I0-6FS +1,712.10-4 F2 (6)
- Dd thi bidu didn tuong quan giiia van toe cat vd vdn tdc ddy vdi do xo sudc rdnh phay T2 nhu hinh 6.
Van tdc- itii}, mm/|th
Hinh 5. Do tkf bieu dien moi quan he giu:a vpn tdc cat, van tdc ddy vdi dg xffxudc rank phay kki ckieu sdu cdt t =1.0mm
V^n toe 4lay, mni/ph
Hinh 6. Dd thi bHu dien moi quan kg giira vgn tdc cat, van tdc day vdi dp xaxudc rdnkphay khi ckieu sdu cdt t =1.5mm
Nhan xet chung: Qua cac s6 lieu xir Iy thi pham t^ 1? thu$n vdi chieu tang cua v|[n toe nghiem vd cdc dd thi d cac hinh 4, 5, 6 ta cd day va ty Id nghjch vdi chieu tdng cua van toe the nhan thdy sd lugng vet sut, vdt xo sudc san cdt. So lugng vdt siit, vdt xo sudc sdn pham
TAJ» CHi KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015
Cdng nghiip rirng tang len khi chieu sau cdt tdng tii 0.5 -^ 1.5mm.
Dieu dd dugc giai thich nhu sau: Khi van toe cat tdng Ien do khoi lugng cdt gpt khdng ddi, khi dd cimg mgt luc cat luoi cdt chi thuc hien cdt gpt vdi lugng phoi nhd, luoi phay dn dinh tdt. Tdc do cao tuong iing vdi tang tdc dd pha huy moi lidn kdt giOa cac phan tu vat Ueu go, khi dd qud trinh cat ggt xdy ra nhanh han sy bidn dang cua cac phdn tii v$t lieu. Nhimg dieu ndy da tao didu kidn nang cao chdt lugng mach cat. Cdn khi tang toe do day thi lugng cdt ggt Idn hon, lyc tac ddng cua go Idn Iudi cdt Idn hon, khi ay miic do dao ddng cua ludi phay ldn hon Iam tang su va d^p giiia canh cdt vdi phdi va do dd sd lugng vdt siit, vet xo sudc tang len. Cung tuong ty nhu vay khi chidu sdu cat Idn han thi so lugng vet sut, vet xo sudc
cimg tang len. Khi chieu sau cat tang Idn, lugng phoi cat Idn hon, luc tac dung Idn Iudi phay tdng Ien lam giam dg dn dinh ciia dao phay. Do do, so lugng vet sut, vet xo sudc san phdm tang len.
3.4. Anh huong cua van toe ciit S, van toe day F tdi dd chdy be mat R
u. Anh hu&ng ciia van tdc cdt S, van toe ddy F t&i do chdy bi mat rdnh phay Rj khi chiiu sdu cdtt= 0.5mm
- Phuang trinh hdi quy md ta tuang quan;
R, = 2,412 - 5,499. IQ-'S + 2,437.10'^S^ - 1,289.10-¥ - 2,45.10-VS + 2,479.10V (7)
- Dd thi bieu dien tuong quan gifia van tdc cat va vdn tdc day vdi do chay be mat ranh phayRI nhu hinh 7.
\~na roc dav, imn/pli
Hlnh 7. Dd thf biiu dien mdi quan he giira vgn toe cdt, van toe ddy vdi dp chdy bi mat rdnh phay khi ckieu sou cdt t = O.Smm b. Anh hu&ng cua van toe cdt S, vgn toe day F
t&i do chdy bi mat rdnh phay Rj khi chieu sdu cdtt = J.0mm
- Phuang trinh hdi quy md ta tuong quan:
R2= 2,796-4,99.10'^S + 2,437.10"^S^- 1,521F .2,65.10^FS +2,959.10-^F^ (8)
- Dd thi bidu dien tuong quan gifia van tdc cdt va van tdc day vdi do chay bd mat ranh phay R2 nhu hinh 8.
TAP CHI KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015
Cdng nghigp rung
c day, luin/pli
HID h 8. Do thi bieu dien mdi quan kg giira van toe cdt, van toe ddy vdi dp chdy be mat rdnh phay kki chieu sau cdt t = 1.0mm c. Anh hu&ng cua van toe cdt S, van tdc day F
t&i do chdy bi mdt rdnh phay R3 khi chiiu sdu cdt t = 1.5mm
- Phuang trinh hdi quy md ta tuang quan:
R3 = 2,628 + 2,5.10-^S + 2,312.10-^ - 1,314.10"
^F - 2,499.10^FS + 2,479.lOV (9)
- Dd thi bidu dien tuong quan gifia van toe cat vd v^n tdc day vdi dO chdy be m^t ranh phay R3 nhu hinh 9.
Hinh 9. Dd thf bieu diin moi quan kg giira van tdc cat, vgn tdc ddy vdi dp chdy be mgt rank phiQ! khi chiiu sdu cdt t = I. Smm Tu ket qud nhan dugc cho thdy quy Iuat
bien doi ciia dien tich vdt chdy trong trudng hgp nay cung tuong tu nhu khi phay vdi chidu sau cat t = 0,5 va l,Omm. Dien tich vdt chay ty Id nghich vdi van tdc ddy va ty Id thudn vdi van toe cdt.
Nhu da ro, trong qua trioh cat mgt phdn nhidt d vimg cdt tmydn vdo chi tiet gia cdng, nhfing vdt chay xuat hi?n khi viing cdt cd nhi^
do cao. Nhiet do dugc truydn vao chi tiet phu thudc vdo chd do cat. Cu thd nhu khi phay vdi van tdc day cao thi nlii?t dg d chi tiet giam do 102 TAP CHI KHOA HOC VA CONG NGHE LAM NGHIEP SO 2-2015
Cdng nghiep rimg thdi gian tdc d^ng nhi?t tdi chi tidt dugc nit
ngan, do vay khd nang chay giam di. Khi tang van tdc cat vdi van tdc ddy va chieu sdu cat khdng ddi, dieu nay tuong iing vdi tang tan so tiep xiic dao cdt vdi phdi Iam tang nhiet do viing cat, do dd muc dg chay tang Idn. Trong trudng hpp tang chieu sdu cdt thi nhidt do cua chi tiet tang. Dieu ndy xudt phdt tu nguydn nhan chinh Id khi dd lugng phoi nhieu, khd thoat nhanh ra ngodi lam ma sat tang va tuong iing la lugng didn tich chdy be m ^ gia cdng tang.
3.5. De suat cac tbdng so cdng nghf gia cdng hop ly
Qua ket qua nghidn cuu thuc nghidm va dd thi tren cdc tu hinh I den hinh 9 cho thay khi gia cdng t^o ranh tren mdy CNC Sherline van tdc cat, tdc do day dnh hudng rat Idn ddn chit lugng gia cong, chieu sdu cat t cd anh hudng nhung vdi miic dp khdng Idn.
Dd dam bao do chinh xac kich thudc sdn phdm theo ydu cau AB < 0,25mm cac thdng so chd do gja cdng dugc xac dinh nhu trong bang 1.
Bang 1. Cde tkong sd che dp gia cong kgp ly tkeo sai sd kich thudc Chieu s^u cat t (mm) Vdn tdc cat S(in/ph) Van toe day F(iniii/phut)
0,5 1,0 1,5 0,5 1,0 1,5 0,5 1,0 1,5
18 18 18 22 22 22 26 26 26
< 3 3 0
< 3 I 5
<275
< 3 4 0
< 3 3 0
< 3 1 0
< 3 5 0
< 3 4 0
<335 Qe xac dinh cac thdng sd che dg gia cdng
hgp ly cd tinh den ydu cau tdi giam sd lugng vdt Slit, vet xa sudc va di?n tich vet chdy
chiing tdi tinh toan cac sd li§u so sanh nhu bang 2.
Bang 2. Cdc thdng so cki dp gia cdng tkeo ddc trung ckdt lugng gia cdng Chilu sau c i t t
(mm) 0.5
1.0
1.5
Van toe c i t S(m/ph)
18 22 26 18 22 26 18 22 26
V i a toe day F(mm/phut) AB<0.25(mm) T< 4.0(vlt/cv)
250 - 308 250 - 320 250 - 340 2 5 0 - 3 1 2 250 - 330 250 - 340 250 - 278 2 5 0 - 3 1 5 250 - 342
2 5 0 - 3 1 2 250 - 322 250 - 345 2 5 0 - 3 1 8 250 - 328 250 - 335 250 - 270 250 - 305 250 - 320
R<0.5(cm'/cv) 265 - 350 285 - 350 320 - 350 250 - 350 285 - 350 320 - 350 250 - 350 250 - 350 275 - 350
IV. KET LUAN
Trdn co sd ciia nhirng nghidn ciiu ly thuyet vd thyc nghidm vd dnh hudng cua cac ydu to che dg gia cdng den chat lugng phay
ranh trdn may CNC Sherline Model 2010 tao cac chi tidt mdu do mdc dan dung, nghien ciiu da d?t dugc mgt sd ket qua sau:
- May CNC Sheriine Model 2010 tai Trung TAP CHI KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015 103
Cdng nghiip rimg
tdn TNTH cua khoa Ca dien & Cdng trinh cd thd van dung hnh hoat de gia cdng cac Ioai mdu go nhd phuc vu dao tao ky su ngdnh chd bien Iam sdn.
- Trdn co sd khdo sat cac ydu td anh hudng den chat lugng gia cdng phay ranh dinh hinh trdn mau gd tren may CNC Sherhne Model 2010 da de xuat dugc kieu logi ludi cat chuydn dung va cac tbdng so cdng nghd gia cdng can nghidn ciiu xac dinh de phii hgp vdi ddi tugng gia cdng la gd va vdt lieu tu go dd la: van tdc cdt, van tdc day va chidu sdu cdt.
Bdng nghidn ciiu thuc nghidm da xay dung dugc cac cdng thuc thyc nghiem xac dinh anh hudng ciia cdc thdng sd cdng nghd gia cdng lya chpn nghien ciiu den cac chi tieu dac tnmg chat lugng gia cdng: sai sd kich thudc - cdc cdng thiic (1), (2), (3); sd lugng vdt xo sudc - cac cdng thiic (4), (5), (6); didn tich vet chay - cac cdng thiic (7), (8), (9). Nhung ket qua nay la co sd quan trpng phuc vu giai bai todn tdi uu hod xdc dinh cac thdng sd tdi uu cho qua trinh gia cdng dam bdo nang cao chat lugng san pham.
- Da tinh toan dugc cac thdng sd cdng ngh$ gia cdng hgp Iy: van tdc cdt 5 = 26 m/phiit, van tdc day F = 320 -^ 335mm/ph va chieu sdu cdt t = I mm cho phay rdnh trdn mau go Huang, khi dd dam bao dugc chdt
lugng san phdm gia cdng cao.
- Ket qua lap trinh gia^ cdng, gia cdng khdo nghiem trong didu kidn th^rc td tai phdng thyc hanh cdng nghe CNC cua khoa Ca didn &
Cdng trinh cho thdy cac chi tieu chdt lugng san pham ddu dam bao tdt cac ydu cdu. Qua dd khang dinh kdt qua nghidn ciiu ve cac thong so cdng nghd gia cdng ma dd tai dua ra cd thd dp dung tot cho gja cdng go va cdc v§t lieu tu gd.
TAI LIEU THAM KHAO
1. Pham Van Lang, Badi Qudc Khang (1998), Orsdly th^ quy hogch time nghiem vddng dung trong ky thugt ndng nghigt, Nxb. N&ig nghiep. Ha Ndi.
2. Hoang Nguyen (1980), Mdy thiel bi gia cong go.
Tap 1 - Nguyen ly cat got go, Nxb. Ndng nghiep. Ha Ngi.
3. Nguyen Thi San, Nguyen Ng(?c Phuong (2012), Sd tay gia cong CNC, Nxb. Khoa hgc va ky thuat, Ha Npi.
4. Hoang Viet, Hoang Thj Tliuy Nga (2010), Cff so tinh todn thiet ke mdy vd thiet bi gia cong go, Nxb.
Ndng nghiep. Ha Ndi.
5. Hoang Viet (2012), Nghien ciiu loi im hoa qud trinh phay bdo go, Bao cao ket qua de tai khoa hoc, Trudng dai hgc Lam nghiep, HN.
6. Hoang Viet (2012), Mdy vd thiit bi chi biin gd, Nxb. Ndng nghiep, Ha Ndi.
7. Joe Martin, Ray Henry (2012), Operating Instruction for the Sherline vertical milling machine CNC syctem, Sherline Products.
8. EyxTHHpOB B.H.(1976), CnpasoiHHK MedenbuiMica, H3fl."JIecHafl npoMbiuuieH- HOCTb", MocKsa
104 TAP CHi KHOA HQC VA CONG NGH$ LAM NGHIEP S 6 2-2015
Cdng nghiep rdng
ESTABLISHED PARAMETERS TECHNOLOGY OF WOOD MATERL\LS PROCESSING ON CNC MACHINE CODE SHERLINE 2010
Hoang Vift SUMMARY
The paper presents results of research on the establishment of technologica] parameters Woodworking on the CNC machine code Sherline 2010 currently used in practice centers of faculty of Electrical engineering and constructirai. Results of experim^lal studies have identified the mathematical equations indicate the influence of the three basic parameters of speed crop mode is cutting speed S, velocity thrust F, depth of cut t to specific processing quality milling with complex shape on small wood samples the accuracy of groove width AB, the fiber scratch T and the burning surface machining R. Specifically, when the depth of cut ( = 1,0 mm: AB^ = 1,039 - 0,024S + 6,25.10''S- - 5,33.10-^ F - 4,5.I0-'SF + 1,4.10"*F-; Tj = 8,524 + 0,1395S - 3,499.10-^ - 6,02.10"¥ - 4,15.10"^S + 1,576.10^^ R, = 2,796 - 4,99.10"'S + 2,437.10'^S- - 1,521F - 2,65.10^FS + 2,959.10'*F^, From the basis of parameters that determine the appropriate processing technologies using Sherline CNC machme code 2010 to practice processed wood materials. From that basis determine the parameters appropriate processing technologies use CNC machine code Sheriine 2010 to practice machining wood materials: 5 = 26 m/min., F ^ 320 -s- 335 mm/min. va / = l.Omm. This result can also be applied effectively on CNC machines and other devices have similar specs to the CNC machine code Sheriine 2010.
Keywords: CNC machine Sherline, cutting mode, fiber scratch, influence, performance, surface fire.
Ngirdi phan bien Ng^y nhdn bai Ngay phan bien Ngay quyet dinh dang
PGS.TS. Vu Khac Bay 07/3/2015
19/5/2015 09/6/2015
T ^ CHI KHOA HQC VA CONG NGHE LAM NGHIEP SO 2-2015 105
