Lựa chọn bộ thông số hình học hợp lý của mảnh dao hợp kim cứng chế tạo tại Việt Nam theo chỉ tiêu nhám bề mặt và độ chính xác kích thước khi tiện công tua thép không gỉ SUS304

037-043

B i Ng c Tuyên1*, Nguy n Ch Công1,2
1

Công ty TNHH MTV H a ch t 21 - Th x Ph Th , t nh Ph Th

2

2-11-

-02-2017

T mt t
B i b o tr nh b
l a ch n h p l
nh d ng h nh h c m nh dao
h p kim c ng ch t o t i Vi t Nam (b n k nh m i dao r, g
c , g c sau , g c nâng
mb o
nh m b m t v
ch nh x c k
c h nh h c khi ti n chi ti t th p không g SUS304 c biên d ng
cong l i trên m y ti n CNC.
nh gi m
ng c
nh h c d ng c c
iv
nh m b m t, v
ch nh x c k ch t
g

c c m
ng l n nh t, ti p n l b n
k nh m i dao r, g c sau v cu i c ng l g c nâng . Qua phân tích, th o lu
n
c
h nh d ng h nh h c m nh dao h p kim c ng ph
nh m b m t v
chính xác k
c (-5o), g c sau
o
o
o
(12 ), b n k nh m i dao r (0,4mm), g c nâng -6 ), g c nghiêng ch nh
93 ), g c m i dao 35o).
T kh a: Th p không g

nh m b m t (Ra), T s S/N, Phân t

Abstract
This paper presents an experimental study for selecting the appropriate geometrical parameters such as
of carbide insert, which is made in Viet nam,
to ensure best surface roughness and dimensional accuracy contour turning SUS304 stainless steel with
convex curved profile on the CNC lathe. Method of experimental design and analysis of variance shuch as
Taguchi and ANOVA were used to assess the influence level of the geometric parameters of cutting tools on
the two targets. The study results shows that for the surface roughness and the dimensional accuracy,
assessed by the deviation of the machining diameter compared with the design diame
he the greatest influence level, Followed by, the contribution percentages for the nose radius r, the
finds out the optimized parameters to achieve the best surface roughness and dimensional accuracy
o), the nose radius r (0.4 mm),the
simultanously

-5o
o
o
-6o
), the nos
).
Keywords: Stainless steel, Surface roughness (Ra), Signal to Noise (S/N), Analysis of variance (ANOVA).

*

*

Tel: (+84) 904180428
Email:


037-043
o

o

o

o

2.1. V t li u, d ng c , thi t b th nghi m
V t li u:

b min

(MPa)

o

o

c min

(MPa)

min

(%)

min

(%)

(HVmax)


037-043

Thi t b :
, (%)
max

max

max

M

nh m:

, (%)
a
y
max
a

d
(g/cm3)

M u th nghi m:

u

(MPa)

(HRA)
2.2 Nghiên c u, l a ch n c c thông s h nh h c
m nh dao h p kim c ng ( tr ng th i t nh).

-0,05

D ng c

c t:
o

o

.

o

o

o


037-043

o
i

o

e

o

T

A

B

C

o
A

A

T

B

B

T

C

C

T

e

e

T

2.3. Thi t k th nghi m Taguchi

o

n

MSD

j
0

n

xj
j 1

x0

2


037-043

TT

B ng tr c giao
r

RaTB

S/NRa

(mm)

1

0

10 0.2 -6

1.385 -2.8290 0.0510

25.8486

2

0

10 0.2 -6

1.367 -2.7154 0.0505

25.9342

3

0

10 0.2 -6

1.371 -2.7407 0.0513

25.7977

4

0

12 0.4

0

1.227 -1.7769 0.0341

29.3449

5

0

12 0.4

0

1.203 -1.6053 0.0327

29.7090

6

0

12 0.4

0

1.231 -1.8052 0.0312

30.1169

7

0

14 0.6

6

1.113 -0.9299 0.0437

27.1904

8

0

14 0.6

6

1.112 -0.9221 0.0432

27.2903

9

0

14 0.6

6

1.117 -0.9611 0.0414

27.6600

10

-5

10 0.4

6

1.019 -0.1635 0.0350

29.1186

11

-5

10 0.4

6

1.013 -0.1122 0.0311

30.1448

12

-5

10 0.4

6

1.012 -0.1036 0.0330

29.6297

13

-5

12 0.6 -6

0.933 0.6024 0.0213

33.4324

14

-5

12 0.6 -6

0.862 1.2899 0.0242

32.3237

15

-5

12 0.6 -6

0.901 0.9055 0.0211

33.5144

16

-5

14 0.2

0

1.127 -1.0385 0.0411

27.7232

17

-5

14 0.2

0

1.122 -0.9999 0.0392

28.1343

18

-5

14 0.2

0

1.112 -0.9221 0.0363

28.8019

19 -10 10 0.6

0

1.397 -2.9039 0.0513

25.7977

20 -10 10 0.6

0

1.391 -2.8665 0.0524

25.6134

21 -10 10 0.6

0

1.397 -2.9039 0.0532

25.4818

22 -10 12 0.2

6

1.313 -2.3653 0.0573

24.8369

23 -10 12 0.2

6

1.282 -2.1578 0.0533

25.4655

24 -10 12 0.2

6

1.243 -1.8894 0.0521

25.6632

25 -10 14 0.4 -6

1.112 -0.9221 0.0432

27.2903

26 -10 14 0.4 -6

1.113 -0.9299 0.0423

27.4732

27 -10 14 0.4 -6

1.125 -1.0231 0.0441

27.1112

T ng

-34.789

756.448

a


037-043

a

mm.

2

a

3

2

2

2

o

3

1
2

2

2

1

o

o

o

2

2
1

o

2

o

2

o

mm)

-0,05

(mm)
(o)

a

(o)
o

()
(o)
(o)

2

1


037-043

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