i
:
THÁI NGUYÊN
i Trung tâm H
/>
Tôi là:
-
khí, khóa 2011-
-
.
Thái Nguyên, ngày 18 tháng 11
i Trung tâm H
/>
-
ngh
giáo,
i Trung tâm H
/>
....................................................................................................... i
N ........................................................................................................... iii
................................................................................................................. iv
.............................................. vii
....................................................... ix
DAN
........................................................................................x
....................................................................................................- 1 ..................................................................................... - 1 ............................................................... - 2 ......................................................................................... - 3 .............................................................. - 3 ........................................................................................ - 3 -
Ch
ng 1.
...............- 4 ............................................................. - 4 -
1.1.1. Quá trình hình thành phoi ............................................................................ - 4 .....................................................................- 4 ..........................................- 5 1.1.1
.................................................- 5 .............................................................................................................- 6 -
1.2.1. C
.....................................................................- 6 ..................................................... - 7 ................................................................................................................- 9 -
1.3.1. N
.......................................................................................................- 9 ...................................- 12 ..............................................- 12 i Trung tâm H
/>
...........................................................- 12 ............................................................- 12 .........................................................................................................- 13 Ch
ng 2.
............................................................................................................- 14 .................................................- 14 ..............................................................- 15 ..............................................................................- 16 ........................................................................................- 16 .....................................................................................- 16 ...........................................................................- 17 -
2.3.5
........................................................... - 17..........................................................- 18 -
2.3.6
................................................................................- 20 -
2.3.7
.........................................................................................- 22 -
2.3.8
..............................................................- 23 ....- 24 ....................................................................................................- 24 .......................................................................- 24 -
Ch
ng 3
.....................................................- 26 -
3.1. Ph
.........................................................- 26 ..................................- 26 ........................- 27 ...................................................................- 30 .........................................................- 30 ..................................................................................- 30 -
i Trung tâm H
/>
.......................................................................................- 31 .............................................................................- 34 3.4.1.S
.....................................................................- 34 ..................................................................................- 35 ...................................................................- 35 .............................................................................................- 37 ..........................................................................................- 41 ng 3 .........................................................................................- 42 ................- 43 .................................................................................- 45 -
i Trung tâm H
/>
Góc
1
G
G
t
C
S
L
V
V
Ra
L
C
Lo
C
a1
a
R
ng lên dao
Ro
R1
N
Fo
N'
Fo
i Trung tâm H
/>
Px
T
Py
T
Pz
T
n
S
A
A1
A2
A3
Công s
Ps
Q
o
T
dao
G
Góc sau
D
P
i Trung tâm H
/>
.......................................................................................... - 5 Hình 1.2. S
............................. - 5 -
Hình 1.3. S
...................................................... - 6 -
Hình 1.4. S
.........................................................- 11 .................................................................................- 17 .......................- 19 -
Hình 2.3. S
........................................................- 20 -
Hình 2.4. S
.........................................................................- 21 -
Hình 2.5. S
...................................................- 21 Hình 2.6. S
...............................................- 22 -
Hình 2.7. Các
.................................................- 23 .............................................................................- 31 -
Hình 3.2: Trung tâm gia công VMC - 85S ..........................................................- 32 Hình 3.4: Phôi thép lò xo 60C2............................................................................- 33 .............................................- 33 -201 ...........................................................................- 34 Hình 3.7: S
.............................................................- 34 ............................................- 39 ............................................- 40 ..........................................- 41 ..........................................- 41 -
i Trung tâm H
/>
...................................................- 35 ..................................................................- 36 -
i Trung tâm H
/>
-1-
1. Tính
-
này có
14].
i Trung tâm H
/>
phay c
2
.
a).
i Trung tâm H
/>
a công VMC - 85S -
Công
Thái Nguyên.
Dao:
Phay tinh
khi gia cô
là thép lò xo 60C2 qua tôi.
a
c s cho vi c nghiên c u t i
S d ng làm c s cho vi c l a ch n ch
các lo i thép
nâng cao
chính xác, và ch t l
i Trung tâm H
t i các c s s n xu t
.
c t khi phay
Vi t Nam
ng b m t chi ti t gia công.
/>
1.1.
1.1.1. Quá trình hình thành phoi
1.1
oi
[4].
[4].
[4].
i Trung tâm H
/>
1.1
2a), sau
2
5 (hình 1.2c).
(
)
, góc
1.1
i Trung tâm H
/>
1.2.
Hình 1.3
(Hình 1.3
)
0
0
0
R0= N + F0.
0
1.
0
hình 1.4
0
= R0 + R1
-
-
y
i Trung tâm H
y
/>
là
.
Pz = Ncos + F0sin + F0
Py = -Nsin + F0cos
2
0
);
]:
Px = (0,2
0,3)Pz
Py = (0,3
0,4)Pz
S, V, t,
,
i Trung tâm H
/>
t/sin
tb
v
h
x pv
1
)
tb
v.
v
i Trung tâm H
/>
v
sau:
theo S
:
x pv
y pv
1.3.
1.3.
n dao [4].
i Trung tâm H
/>
A1
A2
A3
z.L
Pz
A = Pz.V = Ps.Vs + F.VF + F1.VF1
Pz
Vs
F1
VF = V/K:
(m/phút);
VF1
dao (m/phút), VF1 = V.
Vì
:
Q =A/427 = Pz.V/427
i Trung tâm H
/>
4
xung quanh.
(Hình 1.4
gia công
Q = Q1 + Q2 + Q3 = Qp + Qd + Qc + Qm
Tro
:
Q1, Q2, Q3
(1);
Qp, Qd, Qc, Qm
. [4]
0
0
0
Khi
i Trung tâm H
C.
C và 4000C. [4]
/>
. [4]
[4]
1.4.
nay khi
quá
vào trong
.C
phay
- Manufacturing Technology,
.
công trình n
i Trung tâm H
/>
,
1.5.
i Trung tâm H
/>
2.1.
p kim)
c
gia công khuôn
vùng
8000
0
i Trung tâm H
11000C.
/>
80% n
40%
nhi
2.2.
Thép lò xo
ng là các mác thép carbon cao (
là mác thép 60C2 (GOST), S60CM(JIS)
i Trung tâm H
/>