TOM TATTrong nhirng nam gftn day tren th~ gioi gia cong t6c d9 cao HSM-high speed machining dff duoc irng dung r~t rong rffi vao trong san xu~t co khi, di}.cbiet tren cac may CNC, g6p ph
Trang 2Gr ~~ ' f: ;
TRUONG f)~I HQC SUPH~M KY THU~T
BQ GIAO DVC v A D Ao TAO
THANH PHO HO CHi MINH
LU~N vAN TH~C sl
PH~M QUOC L<}I
XAY DlfNG QUI TRINH TiNH ToAN CHE DQ CAT
CHO GIA CONG TOC DO CAO TREN MAy PHAY CNC
NGANH: CONG NGHt CHE T~O MAy - 605204
Huang dfrnkhoa hoc: TS DANG THIBN NGON
~ ~ J l~ ~ ~t_ ; "' ~~ ~ am2012
~~~~~~~ ~ ~~ ! ~ " ~= •- 'V ~ ~f t~ 1 A ~ ,n ~ ~ '~ F=~ i F =~~~~~~~~~
- - .
-' "
Trang 3TOM TAT
Trong nhirng nam gftn day tren th~ gioi gia cong t6c d9 cao (HSM-high speed machining) dff duoc irng dung r~t rong rffi vao trong san xu~t co khi, di}.cbiet tren cac may CNC, g6p phan nang cao nang su~t giup giam gia thanh san pham o Viet Nam cong nghe nay cling dff duoc irng dung va buoc dftu mang lai hieu qua thiet thuc Tuy nhien viec chon ra ch~ d9 c~t gia cong t6c d9 cao tren co sa cac h~ thong cong thirc va bang tra cti thirong diroc dung tren may van nang nhieu khi khong con phu hop ciing nhu khong c6 du cac thong s6 d~ tra ciru Trong d~ tai luan van cao hoc nay toi d~ xu~t mot qui trinh tinh toan ch~ d<)c~t va h~ thong bang tra cuu khi gia cong t6c d9 cao tren may phay CNC Qui trinh tinh toan ducc kiem nghiem va danh gia k~t qua bang cac thirc nghiem ti~n hanh tai tnrong Dai hoc Sir pham Ky
thuat Tp He, Chi Minh va cac d6i tac cong nghiep tir ngay 1 thang 2 d~n 28 thang 2 nam 2012
ABSTRACT
In recent years the world's high-speed machining (HSM) has been widely used for increasing productivity and reduce production costs in mechanical production, especially on CNC machine In Vietnam, HSM is a promising technique and has been initially applied to increase the efficiency, accuracy, the workpiece quality as well as to reduce the production costs and machining time However, the selection
of high-speed cutting mode based on the old formula and table which has been used
on conventional machine tools is not more suitable and not enough parameters for checking In high school the subject of this thesis i proposed a process for calculating cutting mode and the checked table system using for high-speed machining on CNC milling Calculation process has tested and evaluated experimentally at the Ho Chi Minh University of Technical Education and manufacturers from February 1 to February 28, 2012
v
Trang 4MUCLUC• •
TRANG
Trang nra
Quyet dinh giao de Uti
Danh sach cac chtr viet tAt ix
,
1 1 !fmg 5ua~ c~ung ye linh VlJC nghien ciru, cac k€t qua nghien ciru trong va
1.1.1 D~t vAn de: 1
1 2. C'ac ng ren cuu vehiA , ; HSM a? V· AtN H; am va ren ' t A tht e gioi: , 3
1 2 1 Cac nghien ciru ve HSM aVi~t Nam 3
1 2.2 Cac cong trinh nghien ciru tren th€ gioi : 3
1 3 Muc tieu-Nhiem vu- Phuong phap nghien ciru: 6
1 3 1 Muc tieu, khach th~ va d5i tUQ11gnghien ciru: 6
1 3.2 Nhiem vu cua de tai va pham vi nghien ciru : 6
1 3 3 Phuong phap nghien ciru : 7
2 1 Co so ly thuyet cAt got kim loai c6 dien : 8 2.1 1 Cac be mat lam viec trong qua trinh cAt: 8 2.1 2- Cac chuyen dong trong qua trinh cAt: 8 2.1.3- K€t cAu dung cu cAt : 10
2 1 4- V~t lieu lam dung cu cAt: 10
2.2Co sa ly thuyet ve gia cong t5c d9 cao: 14
VI
Trang 52.2.1- Gia cong t6c dQ cao (HSM): 14
5.1 So sanh h~ thong che dQ c~t trong gia cong phay thong thuong voi phay gia
5.1.1 Cong tlnrc tinh che dQ c~t xet d~n cac y~u t6 anh huang trong gia cong
5.1.2 Cong thirc tinh ch~ dQ c~t xet d~n cac y~u t6 anh huang trong gia cong
Vll
Trang 6Chuang 6 :KIEM NGHIEM KET QUA TiNH ToAN CHE D<) cAT TRONG GIA
6.1 Muc dich- M6 hinh hoa qua trinh thirc nghiem : 8
6.1.2 M6 hinh hoa qua trinh thuc nghiem: 81
6.2 Cach thirc xu ly s6li~u thirc nghiem: 82
6.2.2 Cac buoc tien hanh thirc nghiem: 85
Vll