NGHIEN cufu-TRAODdl
^ PHAN TICH MAI MON DUNG CU KHI GIA CONG KHO NHOM HOP KIM A390 B A N G DAO CO PHU NITRIT TITAN
ANALYSIS OF ABRASIVE TOOLS WHEN DRY MACHINING OF ALUMINUM ALLOY TITANIUM NITRITE COATED KNIFE
ThS. Le Nhu- Trang', GS,TSKH. Banh TiSn LongS TS.Tran Xuan ThaiS ThS. Nguyin Van Mui^
'NCS Truotig Dai hpc Bdch Khoa HdNpi
^Giang vien Truong Dai hpc Bach Khoa Hd Npi
^Gidng vien Truang Dai hpc Kinh tl Ky thudt Cong nghiep
TOM TAT
Hien nay, gia cong hap kim nhom tren mdy phay CNC ngdy cdng pho bien. Tuy nhien, viec phdn tich mdi mon dung cu khi gia cong kho nhom hap kim A390 bdng dao co phu Nitrit titan vdn con nhieu hgn che dgc biit khi xet din yeu to th&i gian. Bdi bdo trinh bdy kit qud phdn tich su dnh hu&ng ciia che do cat khi gia cong tren mdy phay CNC KIRA VTC-^OB den luang mon dao khi gia cong kho nhom hgp kim. Kit qud thuc nghiem cho thdy moi quan he giiea cdc thong so che do cdt vd th&i gian gia cong den luong man dao. Tie do thief lap chucmg trinh cho mdy tit dgng bit lucmg mon dao theo th&i gian nhdm ndng cao chdt luang gia cong vd tuoi bin cua dao.
Tur khoa: Nhom hgp kim, chi do cdt, mdi mon.
ABSTRACT
Nowadays, processing aluminum alloy on CNC milling machines is increasingly popular.
However, the analysis of abrasion when processing dry A390 aluminum alloy by titanium nitride coated blades are still limited especially when considering about time. This article presents the analysis result of the influence of the regime cut on CNC miller machine KIRA VTC - 40B to blade abrasion when dry processing aluminum alloy. Experimental results show the relation between the cutting parameters and processing time to the amount of blade abrasion. Then set the program to machine automatically compensate for blade abrasion over time in order to improve processing quality and durability of the blade.
Keywords: Aluminum alloy, cutting parameters, abrasion.
ISSN 0866 - 7056
TAP CHI CO KHf VIET NAM. Sfi 6 nam 2015 www.cokhivietnam.vn
NGHIEN cufu-TRAO Ddl
l.DATVANDE
Cfing nghe gia cong tren mdy phay CNC phu thufic vdo cac yeu to: Mdy, dao, vdt lieu gia cfing, dung dich tron ngufii,... Do tiln bp cua khoa hpc ky thuat, viec phdn tich mai mon dyng cu khi gia cfing khfi nhfim hgp kim dong vai tro rat quan trpng den chdt lugng gia cfing.
Viec xdy dung mfii quan he giua cdc thong sfi che dp cat va lugng mon dao duoi dang mfi hinh toan hpc nhdm:
+ Bieu dien quan he giiia cdc thfing so che dp cdt (V, S^, T) vci lupng mon dao Ah mfit cdch tucmg minh.
+ Ket qud nghien cuu ndy se dugc sii dung ldm dieu kien bien cho bai todn tfii uu hoa qud trinh gia cfing khfi nhfim hpp kim bdng dao phay thep gio cfi phii Nitrit titan tren mdy phay CNC KIRA VTC-^OB.
2. GIAI QUYET VAN DE 2.1. Phirong phap thi nghi&m
So dfi phdn tich mai mfin dimg cu khi gia cfing khfi nhom hop kim bdng dao phu Nihit titan cho or hinh 1.1, cho thdy co ba dai lugng dac tnmg cho thfing sfi cfing nghe dau vdo, do la:
- Van tfic cdt v(m/phiit);
- Lugng tien dao s(mm);
- Chieu sau cdt t(mm).
Sfi diem thl nghiem:
N = 2 ^ - 8 (dilm).
Ap d\ing phucmg phap quy hoach thuc nghiem vd xii Iy sfi lieu ciia gido su Popke, nhom nghien ciiu xay dung so dfi tiln hdnh thi nghiem.
Lupng tien dao Sz(mm/ rang) Hinh I. Sa do quy hogch thuc nghigm
2.2. May va dyng cu thi nghiem Hang may
Kieu may Hanh trinh Toe d$ true ehinh
KIRA VTC-40B
X: 600mm; Y: 400 mm;
Z: 450mm 8000 r.p.m Dung cu gia cong;
Dao phay ngon thep gio co phu Nitrit titan tiSu chuto cac cac thong s6 ky thuat sau:
- Duong kinh than dao phay: ili20mm;
- ChiSu dai than dao: 125mm;
-Vat lieu phu TIAN.
- So Iugng luoi cit: 02.
Vdl lieu Ihi nghiem;
Hpp kim nhom A390.
ISSN 0866-7056
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NGHIEN CUTU - TRAO Ddl
2.3. K i t qua thi nghiem
Bdng I: Thong so chi do cdt
TT 1 2 3
Cac thong so dau vao Van toe cat v(mm/phut) Lugng ch^y dao s(mm/rang)
Chieu sau c i t t(mm)
Gia trj mS hoa - N h o
65 0,020
1.00
0 Trung binh 165 0,065
2.00
+ Lon 300 0,085
4.00 Bang 2: Kit qua lugng mon dao Ah phu thugc thong so cdng nghe v,s,t
Diem TT
POl P02 P03 P04 POS P06,7
POS P09 PIO P l i P12 P13 P14
Thong so cong ngh V(m/phut)
165 65 65 165 300 300 300 65 300 300 165 165 165
S{mm/rang) 0,085 0,085 0,085 0,045 0,045 0,045 0,065 0,065 0,065 0,065 0,100 0,065 0,065
T(mm) 3,12 3,12 2.21 1,31 1,31 2,21 3,12 1,31 1,31 2,21 2,21 1,00 2,21
Lngng mon dao Ah (T=I45ph4t)
(nm) 87 38 24 9 32 35 56 61 03 89 29 31 32 Phucmg trinh lugng mon dao phu thupc vao cac thong so che dp cat (V, S^, T):
Ah = 1 7 ? [/"0.836 O0.748 -T.0,09
Bang 4: Kit qud lUdng mon dao Ah phu thugc vdo thdi gian T
Di§m TT POl P02 P03
Th5ng s6 cong nghe V(m/ph)
165 65 65
S(mm/rg) 0,085 0,085 0,085
T(mm) 3,12 3,12 2.21
Phuvng trinh luornj Lugng mon
Ah=3,496.T''°' Ah=4,321.T°-«' Ah=6,778.T°-"'
;mdn W
0,997 0,996 0,971
Ah=C..T°
c„
3,498 4,321 6,780
c,
1.038 0,927 0,788
ISSN 0866 - 7056
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NGHIEN ClJfU - TRAO Ddl
P04 P05 P06.7
POS P09 PIO PU P12 P13 P14
165 300 300 300 65 300 300 165 165 165
0.04.^
0.045 0.045 0,065 0,065 0.065 0,065 0,100 0,065 0,065
1.31 1.31 :.21 3,12 1,31 1,31 2,21 2,21 1,00 2,21
Ah=6.529.l""-"
AhM.OVI.i'"*' Ah=4.512.T"'"
Ah=4,509.T»'»' Ah=5,341.T»»-"' Ah=4,509.T"™
Ah=4,509.T"'"
Ah=8.862.T""' Ah=4,709.T»''=
Ah=6,228.T"«' 0.989 0.993
o.9s:
0,994 0,993 0,994 0,994 0,980 0,984 0,975
6.530 4.698 4.508 5,086 5,335 5,086 5,086 8,863 4,706 6,228
0,747 0.896 0.891 0,904 0838 0,904 0,904 0657 0,992 0,840 Sir dung phuang phap xir ly so lieu theo
phuong phap ta xdc dinh dupc phuang trinh bieu dien moi quan he giiia luang mon dao \ a thong sfi cfing nghe:
AA = Cn,;..r^' Trons 36:
= 5i2.4s.r-"-'V5,-^'-"-\r'-'
rung dpng. nhiet cat.... cung nhu ma rpng them cac thong so dau vao de qua trinh nghien cim
"Phan tfch \ a toi uu hoa mai mon dung cu khi gia cong kho nhom hpp kim bang dao co phu Nitrit titan" cang da\ du \ a toan dien ciing nhu nang cao dupc dp chinh .\ac cua ket qua nghien cuu.*>
Nga\ nhan bai: 01/6/2015 Ngay phan bien; 13/6/2015 3. K E T LUAN
Tai lieu tham Ivhao:
Nghien cini da dgf dietrc mdt so kit qud sau:
Anh huang ciia \', S^, T toi lupng mon dao Ah tuan theo qu\- iuat ham so mu. Qua so sanh gia tri cac so mu ta thay. van tfic cat co anh huoTig lan nhat den lugng mon dao \ a chieu sau cat CO anh huong nho nhat den JLTong mon dao Ah.
Tir cac ket qua ciia bai bao ket hop ven dicu kien gia cong cu the ta co the lira chpn mfii ben T^ hgp Iy nhat cho qua trinh gia cong. Viec xac dmh tuoi ben T^ cua dung cu tren co sa phan tich. danh gia iupng mon dao Ah. se cho kit qua chinh xac.
Huong phat trien cua de ldi:
Xay dung them cac mo hinh cac dai lugng dac trung nhu: Dp nham be mat. luc cit.
[I] Ngu>en Trcing Binh; Toi ini hoa qua trinh cdt got. bk\
giang cao hoc va nghien cim smh Truong Dai hoc Bach Khoa Ha Noi (i 997).
[2]. Bill Cong Cucmg. Bui Minh Tri; Giao trinh .xdc .xudi l-a f/!d«g/re imgiiyjg, NXB. Giao thong Van tai. Ha Xoi (1997).
[3]- Tiin Van Dinh; Cong nglie tren may C.\C. NXB Khoa hoc Ky thuat (2000).
[4]. Tran Van Dich. Sghien ciru do chinh xac gia cong bang pinrong phdp thuc nghiem. bai giang cao hoc \a nghien ciai sinh Truong Dai hoc Bach Khoa Ha Noi (1997), [5] Ta Van Dlnh: Phirongphap tinli. NXB. Giao due |2000).
[6], Nguyen Nhat Le: T6i mi hoa img dung. NXB Khoa hoc Ky thuat (2001).
[7] Banh Tien Long. TrSn Th^ Luc, Trin S\ Tiiy; Sgicyen l\ gia cong vgt lieu. NXB. Khoa hpc Ky thuat (2000) [8]. R. Khenabi a.*. L, Fatmi b. J. Masounave a. V Songmene a CIRP Joumal of Maoufactunng Science and Technology 6 (2013) 175-180,
[9], M Nouari*. G. List. F Girot, D Ge'hin Intemation- al Journal of Machine Tools & Manufacture 45 (2005) 1436-1442
ISSN 0866 - 7056
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