円管外径の影響

第4章 偏肉率減少を目的とした工具形状の提案 50

第4章 偏肉率減少を目的とした工具形状の提案 51

Fig. 4.2.19 Thickness distribution on thinnest side during drawing with plug (t0ave=3.2mm)

Fig. 4.2.20 Thickness distribution on thickest side during drawing with plug (t0ave=3.2mm)

2.50 2.80 3.10 3.40

-5 0

5 10 15

20

Position from boundary between bearing and taper parts l_p/mm Thickness on thinnest side during drawingtdmin/mm

bearing part taper

part Drawing direction

Tube outer diameter dt /mm

31.5 33

Die half angle

 /°

7 10

0.01 0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33 0.01

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33

2.50 2.80 3.10 3.40

-5 0

5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Thickness on thickest side during drawingtdmax/mm

bearing part taper

part Drawing direction

Tube outer diameter dt /mm

31.5 33

Die half angle

 /°

7 10

0.01 0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33 0.01

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts lp/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts lp/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33

第4章 偏肉率減少を目的とした工具形状の提案 52

Fig. 4.2.21 Distribution of thickness variation during drawing with plug (t0ave=3.2mm)

Fig. 4.2.22 Distribution of thickness variation rate during drawing with plug (t0ave=3.2mm)

0.05 0.10 0.15 0.20 0.25

-5 0

5 10 15

20

Position from boundary between bearing and taper parts l_p/mm Thickness variation during drawingt /mm

bearing part taper

part Drawing direction

Tube outer diameter dt /mm

31.5 33

Die half angle

 /°

7 10

0.01 0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

dt/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33

Tube outer diameter dt /mm

31.5 33

Die half angle

 /°

7 10

0.01 0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts lp/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

dt/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 0.01 33

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

7 10

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

Die half angle

/deg.

bearing part taper

part Drawing direction

Tube outer diameter

d_t/mm 31.5 33 0.01

0.03 0.05 0.07 0.09

-5 0

5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Thickness variation rate during drawingEd

bearing part taper

part Drawing direction

第4章 偏肉率減少を目的とした工具形状の提案 53

(a) Deviatoric hoop stress (b) Deviatoric radial stress Fig. 4.2.23 Distribution of deviatoric stress rate during drawing with plug

(=7°, d^t =31.5mm, t0ave=3.2mm)

(a) Deviatoric hoop stress (b) Deviatoric radial stress Fig. 4.2.24 Distribution of deviatoric stress rate during drawing with plug

(=7°, dt =33mm, t0ave=3.2mm)

-600 -450 -300 -150 0 150 300

-5 0

5 10

15

Thickest side Thinnest side

Position from boundary between bearing and taper parts l_p/mm

bearing part taper

part Deviatoric radial stresssrd' /MPa

Thickest side Thinnest side

Drawing direction

-100 -50 0 50

-5 0 5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Deviatoric hoop stresss' /MPaDeviatoric hoop stresss' /MPa

(a)

(b)

(c)

-100 -50 0 50

-5 0 5 10 15 20

Position from boundary between bearing and taper parts lp/mm Deviatoric radiral stresssrd' /MPa

Position from boundary between bearing and taper parts lp/mm

(a)

(b)

(c)

-600 -450 -300 -150 0 150 300

-5 0

5 10

15

Thickest side Thinnest side

Position from boundary between bearing and taper parts l_p/mm

bearing part taper

part Deviatoric radial stresssrd' /MPa

Thickest side Thinnest side

Drawing direction

-100 -50 0 50

-5 0 5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Deviatoric hoop stresss' /MPa

(a)

(b)

(c) -100

-50 0 50

-5 0 5 10 15 20 Deviatoric radiral stresssrd' /MPa

Position from boundary between bearing and taper parts l_p/mm

(a)

(b)

(c)

第4章 偏肉率減少を目的とした工具形状の提案 54

(a) Deviatoric hoop stress (b) Deviatoric radial stress Fig. 4.2.25 Distribution of deviatoric stress rate during drawing with plug

(=10°, dt =33mm, t0ave=3.2mm)

Fig. 4.2.26 Distribution of deviatric hoop stress on FEM model (=7°, dt =33mm, t0ave=3.2mm)

-600 -450 -300 -150 0 150 300

-5 0

5 10

15

Thickest side Thinnest side

Position from boundary between bearing and taper parts l_p/mm

bearing part taper

part Deviatoric radial stresssrd' /MPa

Thickest side Thinnest side

Drawing direction

-100 -50 0 50

-5 0 5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Deviatoric hoop stresss' /MPa

(a) (b)

(c) -100

-50 0 50

-5 0 5 10 15 20

Position from boundary between bearing and taper parts l_p/mm Deviatoric radiral stresssrd' /MPa

(a) (b)

(c)

Deviatric hoop stress s’ /MPa

-70 40

Die

Tube Plug

y

z

第4章 偏肉率減少を目的とした工具形状の提案 55

ドキュメント内 初期偏肉を有する管抽伸において工具形状が加工後の寸法精度に及ぼす影響 (ページ 55-60)