Design of Flexible Die Punch and Control System for Three-dimensional Curved Forming Surface

DOI : 10.5228/KSTP.2011.20.3.206

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YW]GV穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊G G

࣯焮毖ࣜ昷笛凧彺ࣜ割笊汊ࣜ氊穢ࣜ儆懆匎笛汞ࣜ碆獞ࣜ愕ࣜࣜ

洢檺柢枪癢ࣜ昪凊ࣜ

G

昢欇笾

竎昷焲

割痢歊

卆 洛

儛憚朞

G

Design of Flexible Die Punch and Control System for Three-dimensional Curved Forming Surface

G

Y. H. Seo, S. C. Heo, T. W. Ku, J. Kim, B. S. Kang

(Received November 17, 2010 / Revised March 17, 2011 / Accepted April 1, 2011) G

Abstract

A flexible die, which is composed of a number of punches with adjusted heights to form a three-dimensional curved surface, is a crucial part of a flexible forming technology. In this study, the punch and control system of the flexible die were designed.

The flexible die is divided into three modules, namely, punch, control and joint, and the corresponding modules were developed.

The punch module materializes a three-dimensional forming surface by the control module, which is composed of an AC servo motor set and a linear guide. The joint module is necessary for the sequential motion between the servo motor set and the punch module. A sequential motion algorithm for the AC servo motor set, that uses the data of the punch relative heights, was also proposed. Finally, a flexible stretch forming test was carried out using the presently designed flexible die.

G G

Key Words : Flexible Forming Technology, Flexible Die, Three-dimensional Curved Forming Surface

41# ⇆# ᤊG G

3㹾㤦 ἷ䕦㠦 ╖䞲 㑮㣪⓪ ㍶⹫, 䟃Ὃ₆, 㧦☯

㹾, ἶ㏣㻶☚ ❇ ┺㟧䞲 ㌆㠛㠦㍲ 㰖㏣㩗㦒⪲ 㺓 㿲♮ἶ 㧞┺. 㰖⁞₢㰖⓪ ┾㧒⁞䡫(solid die)㦚 ㌂ 㣿䞮㡂 䞮⋮㦮 ⁞䡫㦒⪲ 䞮⋮㦮 3㹾㤦 䡫㌗㠦 ╖ 䞲 䕦㨂⯒ ㌳㌆䞮㡖ἶ, ㏢䛞㫛 ╖⨟㌳㌆ 㼊㩲㠦

₆⹮㦚 ⚦㠞▮ 㫛⧮㦮 ㌆㠛㠦㍲⓪ ⶊⰂ㠜㧊 ㌂㣿

♮㠊 㢪┺. ㏢⨟㌳㌆㧊 䞚㣪䞲 ⿖䛞㦮 ṖὋ⿚㟒㠦

⓪ ⁞䡫Ṳ⹲㠦 ➆⯊⓪ ἓ㩲㎇㦚 Ⱒ㫇㔲䋺₆ 㥚䞮 㡂 㑮㧧㠛㦚 ㌂㣿䞮㡂 㢪┺[1]. 㫆㍶㠛㠦㍲ Ⱔ㧊

㌂㣿♮ἶ 㧞⓪ ㍶㌗Ṗ㡊⻫(line heating method)㧊

╖䚲㩗㧎 㡞㧊┺[2]. 䞮㰖Ⱒ 㑮㧧㠛㠦 ➆⯊⓪ 㡊㞛 䞲 㧧㠛䢮ἓ㦖 Ṳ㍶♮㠊㟒 䞮Ⳇ, 㧦☯㹾 ㌆㠛㠦㍲

☚ 㧦₆ ⰴ㿺䡫 㧦☯㹾㠦 ╖䞲 㑮㣪Ṗ 㯳Ṗ䞾㠦

➆⧒ ┺䛞㫛 ㏢⨟㌳㌆㼊㩲⪲ ザ⯊Ợ ㌆㠛ῂ㫆Ṗ 㩚䢮♶ ộ㦒⪲ 㡞㌗♲┺. ⡦䞲 䟃Ὃ₆ ⹥ ἶ㏣㻶

☚㦮 㣎䞒(skin structure)⓪ ⁎ 䡫㌗㧊 ⰺ㤆 ┺㟧䞮 㡂 ┺䛞㫛 ㏢⨟㌳㌆ ῂ㫆㠦 㩗䞿䞲 ㌆㠛䡫䌲⪲

㰖⁞₢㰖 ἷ䕦 䡫㌗㠦 ➆⧒ ㏢㣪♮⓪ ⁞䡫㦮 Ṳ

⹲, ⽊ὖ ⹥ ㍺䂮 ゚㣿㦒⪲ 㧎䞮㡂 ἓ㨗⩻㦮 㩖䞮

⯒ Ṗ㪎㢪┺[3, 4]. ➆⧒㍲ ㌆㠛ῂ㫆㦮 㩚䢮₆⯒ ⰴ ἶ 㧞⓪ 䡚 㔲㩦㠦㍲ ㌞⪲㤊 ㌳㌆㼊㩲㠦 㩗䞿䞲 ἷ䕦㦮 ㎇䡫Ὃ㩫㧊 䞚㣪䞮┺.

⽎ 㡆ῂ㠦㍲⓪ Ṗ⼖⁞䡫[5, 6]㦮 ㍺Ἒ ⹥ 㧊⯒

㧊㣿䞮㡂 3㹾㤦 ㎇䡫ἷⳊ㦚 ῂ䡚䞮ἶ㧦 䞲┺. Ṗ

⼖⁞䡫㦖 ┺㑮㦮 䗖䂮⪲ ῂ㎇♮㠊 㧞㦒Ⳇ, 㧊✺㦮

⏨㧊⯒ ㎇䡫ἷⳊὒ ⿖䞿䞮☚⪳ 㫆㩞䞾㦒⪲㖾 䞮

⋮㦮 ⁞䡫㦒⪲ ┺㟧䞲 ㎇䡫ἷⳊ㦚 ῂ䡚䞶 㑮 㧞

┺[1, 7]. Ṗ⼖⁞䡫㦖 ṗṗ㦮 ₆⓻㠦 ➆⧒ 䋂Ợ 3Ṳ

XUG ⿖㌆╖䞯ᾦG 䟃Ὃ㤆㭒Ὃ䞯ὒG ╖䞯㤦G YUG ⿖㌆╖䞯ᾦG 䟃Ὃ㤆㭒Ὃ䞯ὒG

JG ᾦ㔶㩖㧦aG ⿖㌆╖䞯ᾦG 䟃Ὃ㤆㭒Ὃ䞯ὒSG‰š’ˆ•Žg—œšˆ•UˆŠU’™G

穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊VYW^G

G

㦮 ⳾✞(䗖䂮, 㩲㠊, 㼊ἆ)⪲ ῂ㎇♲┺. ┺㑮㦮 䗖 䂮⪲ ῂ㎇♮㠊 㧞⓪ 䗖䂮⳾✞㦖 3㹾㤦 ㎇䡫ἷⳊ 㦚 ῂ䡚䞮Ⳇ, ṗṗ㦮 䗖䂮⏨㧊⓪ AC ㍲⽊⳾䎆㢖 Ⰲ┞㠊 Ṗ㧊✲⪲ ῂ㎇♲ 㩲㠊⳾✞㠦 㦮䟊 㫆㩞♲

┺. 㼊ἆ ⳾✞㦖 䗖䂮⳾✞ὒ 㩲㠊⳾✞㦮 㡆ἆ₆⓻ 㦚 㑮䟟䞶 㑮 㧞☚⪳ ㍺Ἒ䞮㡖┺. ⡦䞲 䗖䂮⳾✞

㧊 ㎇䡫ἷⳊ㦚 ῂ䡚䞮₆ 㥚䟊㍲ 㾲㏢㦮 ㍲⽊⳾䎆

⪲ ┺㑮㦮 䗖䂮⯒ 㩲㠊䞮₆ 㥚䞲 㑲㹾㩗 㩲㠊 㞢 ἶⰂ㯮㦚 Ṳ⹲䞮㡖┺. 㧊 ➢ ṗ 䗖䂮㦮 ⏨㧊⓪ ₆ Ṳ⹲♲ 䗖䂮⏨㧊 ㌆㿲 㞢ἶⰂ㯮[1]㠦 㦮䟊 Ἒ㌆♲

┺. 㾲㫛㩗㦒⪲ Ṗ⼖⁞䡫㦚 㧊㣿䞮㡂 3㹾㤦 ㎇䡫 ἷⳊ㦚 ῂ䡚䞮㡖㦒Ⳇ, 㧊⯒ 㧊㣿䞮㡂 㓺䔎⩞䂮 ㎇ 䡫㔺䠮㦚 㑮䟟䞮㡖┺.

G

51# 㘂ᖆ➒♞# ⇎൮

514# 㐪⼂᭒ᕲ#

Fig. 1㦖 䗖䂮⳾✞㦮 ㍺Ἒ☚㧊┺. 䗖䂮⳾✞㦖 ㎎

⿖㩗㦒⪲ 䗖䂮, 䗖䂮⺆㡊, ㌂㧊✲ 䝚⩞㧚 ⁎Ⰲἶ 䞮⿖ 䝚⩞㧚㦒⪲ ῂ⿚䞶 㑮 㧞┺. ⁎ 㭧 Ṗ⼖⁞䡫 㠦㍲ Ṗ㧻 䟋㕂㩗㧎 㡃䞶㦚 䞮⓪ 䗖䂮㠦 ╖䞲 ㎎

⿖㍺Ἒ㠦 ╖䟊 㤆㍶㩗㦒⪲ ㍺ⳛ䞲┺. 䗖䂮⓪ Fig.

2㠦 ☚㔲䞲 ⹪㢖 ṯ㧊 䗖䂮䠺✲(head), 㓺䋂⮮

(screw), 䃷(cap), 㰖㰖╖(support), 㫆㧎䔎(joint) 㽳 5 Ṳ㦮 ⿖䛞㦒⪲ ῂ㎇♮㠊 㧞┺.

㎇䡫Ὃ㩫 㭧 䕦㨂㢖 㰗㩧㩗㦒⪲ 㩧㽟䞮⓪ 䗖䂮 䠺✲㦮 䡫㌗㦖 Fig. 3ὒ ṯ㦖 ⹮ῂ䡫㌗㦒⪲ ἆ㩫䞮 㡖┺. 䗖䂮㦮 ㌗╖⏨㧊⓪ 䗖䂮䠺✲㦮 䡫㌗ὒ 䗖䂮

Side Frame Punch

Punch Array

Lower Frame

Fig. 1 Schematic diagram for flexible die

䠺✲㢖 䕦㨂Ṗ 㩧㽟䞮⓪ 㩧㽟㩦㠦 㦮䟊 ἆ㩫♮⸖

⪲ 䗖䂮䠺✲㦮 䡫㌗㠦 ╖䞲 ⏨㦖 ṖὋ 㩫⹖☚Ṗ 㣪ῂ♲┺. ⡦䞲 䗖䂮㦮 ⏨㧊⓪ ⋮㌂㤊☯㠦 㦮䟊 㫆㩞♮⸖⪲ ⋮㌂㦮 ṖὋ㡺㹾⓪ ㎇䡫㡺㹾㢖 㰗ἆ

♲┺. ➆⧒㍲ 䗖䂮 㓺䋂⮮⓪ 㧒⹮ 㼊ἆ㣿㧊 㞚┢

1 㦮 㩫⹖☚⯒ Ṗ㰚 㑮⋮㌂⪲ ṖὋ♮㠞㦒Ⳇ, 㞪

⋮㌂⪲ ṖὋ♲ 䗖䂮 䃷ὒ ἆ䞿♮㠊 ㍲⽊⳾䎆㦮 䣢㩚㠦 㦮䟊 ⏨㧊Ṗ 㩲㠊♲┺. ⡦䞲 ⋮㌂ 㩧㽟 Ⳋ 㩗㠦 㦮䟊 ⹲㌳䞮⓪ Ⱎ㺆㦚 㾲㏢䢪 䞮₆ 㥚䞮㡂 䃷 ⌊⿖㦮 ⋮㌂ ṖὋ⿖⓪ 㾲㏢㦮 Ⳋ㩗㦚 Ṭ☚⪳

㍺Ἒ♮㠞┺. Ⱎ㺆㦚 㾲㏢䢪 䞾㦒⪲㖾 䗖䂮㩲㠊 㔲 䞚㣪䏶䋂⯒ 㭚㧊Ⳇ, 㩲㧧゚㣿ὒ 㰗ἆ♮⓪ ㍲⽊⳾

䎆㦮 㣿⨟㦚 㭚㧒 㑮 㧞┺. 䗖䂮 㫆㧎䔎⓪ 㼊ἆ

⳾✞ὒ 㡆ἆ♮㠊 ㍲⽊⳾䎆 ㎎䔎㦮 㑲㹾㩗 㩲㠊⯒

Ṗ⓻䞮☚⪳ ㍺Ἒ♮㠞┺. Ⱎ㰖Ⱏ㦒⪲ 䗖䂮 㰖㰖╖

⓪ 䗖䂮⳾✞㦮 䞮⿖ 䝚⩞㧚ὒ 䞾℮ ㎇䡫Ὃ㩫㠦㍲

⹲㌳䞮⓪ 䞮㭧㦚 㰖䍇䞮⓪ 㡃䞶㦚 䞲┺.

䗖䂮⺆㡊㦖 ㎇䡫Ⳋ㩗ὒ 䗖䂮䋂₆㠦 ➆⧒ ἆ㩫♮

Ⳇ ⳿㩗ἷⳊ㠦 ⿖䞿䞮⓪ 3㹾㤦 ㎇䡫ἷⳊ㦚 䡫㎇

䞮Ợ ♲┺. 200mmശ300mm㦮 ㎇䡫Ⳋ㩗㠦 ╖䞮㡂 䗖䂮㦮 䋂₆Ṗ 20mm㧎 ἓ㤆 䗖䂮⺆㡊㦖 10ശ15

⪲ ἆ㩫♲┺. ㌂㧊✲ 䝚⩞㧚㦖 䗖䂮⺆㡊㧊 ⿚㌆♮

㠊 ㎇䡫ἷⳊ㦮 㡺㹾Ṗ ⹲㌳䞮㰖 㞠☚⪳ ㎇䡫䞮㭧 㦚 㰖䍇䞲┺. ⡦䞲 ㎇䡫Ὃ㩫㠦㍲ ⹲㌳䞮⓪ 䞮㭧㦖 ṗṗ㦮 䗖䂮㠦 㧧㣿䞮㡂 ⋮㌂㠦 ㏦㌗㧊 ⹲㌳䞶

Fig. 3 Shape of punch head

Punch cap Punch screw

Punch joint Punch support Punch cap Punch screw Punch head

Punch joint Punch support Punch head

G Fig. 2 Punch structure composed of five parts

YW_GV穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊G G

㑮 㧞ἶ 㰖㏣㩗㧎 䞮㭧㠦 㦮䟊 䗖䂮㦮 㫢Ὴ㧊 ⹲

㌳䞲┺. 㧊⓪ ㎇䡫㡺㹾㦮 㤦㧎㧊 ♮⸖⪲ 䞮⿖ 䝚

⩞㧚ὒ 䗖䂮 㰖㰖╖⯒ ㍺Ἒ䞮㡂 ㎇䡫䞮㭧㦮 㰖䍇

⹥ ⿚㌆㦚 㥶☚䞮㡖┺.

#

515# ⣆♞᭒ᕲ#

䗖䂮⳾✞㧊 ⳿㩗ἷⳊὒ ⿖䞿䞮⓪ ㎇䡫ἷⳊ㦚 䡫㎇䞮₆ 㥚䟊 ṗṗ㦮 䗖䂮⏨㧊⓪ 3.1㩞㦮 䗖䂮⏨

㧊 ㌆㿲 㞢ἶⰂ㯮㠦 㦮䟊 Ἒ㌆♮⓪ 䗖䂮㦮 ㌗╖

⏨㧊㠦 ➆⧒ ㍲⽊⳾䎆㠦 㦮䟊 㫆㩞♮㠊㟒 䞲┺.

㞴㍲ 㠎 䞲 ⹪㢖 ṯ㧊 䗖䂮㦮 ⏨㧊 㫆㩞㦚 㥚䞮 㡂 䗖䂮ῂ㫆⓪ 㑮⋮㌂㢖 㞪⋮㌂㦮 ἆ䞿㦒⪲ 㧊⬾

㠊㪎 㧞┺. 㯟 䗖䂮㦮 ㌗╖⏨㧊⓪ ⋮㌂㦮 䣢㩚㠦 㦮䟊 㫆㩞♮Ⳇ, 㔳 (1)ὒ ṯ㧊 ⋮㌂㦮 䞒䂮㢖 䣢㩚 㑮㠦 㦮䟊 ⏨㧊⓪ ἆ㩫♲┺(Fig. 4).

G

h revupitch (1)

㡂₆㍲ rev⓪ 䣢㩚㑮⯒ 㦮⹎䞮Ⳇ, pitch[mm/360deg]

⓪ 1䣢㩚╏ 㧊☯ỆⰂ⯒ 㦮⹎䞲┺. 㯟 ⋮㌂Ṗ 1䣢 㩚 䞶 ➢Ⱎ┺ 䗖䂮㦮 ⏨㧊⓪ 䞒䂮Ⱒ䋒 㫆㩞♲┺.

ṗṗ㦮 䗖䂮⓪ ㍲⽊⳾䎆⯒ 㧊㣿䞮㡂 㩲㠊䞮Ợ ♮

⓪◆, ⳾✶ 䗖䂮㠦 ㍲⽊⳾䎆⯒ ἆ䞿䞮㡂 ☯㔲㠦

⏨㧊⯒ 㫆㩞䞾㦒⪲㖾 3㹾㤦 ἷⳊ ㌳㎇㠦 ㏢㣪♮

⓪ 㔲Ṛ㦚 䋂Ợ 㩞Ṧ䞶 㑮 㧞┺. 䞮㰖Ⱒ ㍲⽊⳾䎆 Ṗ ἶṖ㦮 ⿖䛞㧚㦚 Ṧ㞞䞮Ⳋ, ㎇䡫Ⳋ㩗㧊 䄺㰖ἶ 䗖䂮䋂₆Ṗ 㧧㞚㰦㠦 ➆⧒ 䗖䂮㢖 ㍲⽊⳾䎆Ṗ 㯳 Ṗ䞮Ợ ♮⸖⪲ 䗖䂮㢖 ⳾䎆㦮 1:1⺆䂮⓪ 㩲㧧゚㣿 㦮 ㌗㔏 ⹥ ㌳㌆┾Ṗ ㌗㔏㦮 㤦㧎㧊 ♲┺. ➆⧒㍲

1 Pitch

1 rev = 360¶

Female Screw

Male Screw

G Fig. 4 Punch structure by combination of female and

male screwsG

㫛䣷⹿䟻㦮 㤖㰗㧚㦚 ἆ㩫䞮⓪ ⳾䎆㢖 䗖䂮㦮 ⏨ 㧊 㫆㩞㠦 㰗㩧㩗㦒⪲ ㌂㣿♮⓪ ⳾䎆⪲ ῂ㎇♲

㍲⽊⳾䎆㎎䔎⯒ 䢲㣿䞮㡂 ㍺Ἒ䞮㡖┺. 㩲㠊⳾✞㦖

㍲⽊⳾䎆㎎䔎㢖 ⏨㧊㫆㩞 ⳾䎆㦮 㫛䣷⹿䟻 ⳾㎮

㦚 㥚䞲 Ⰲ┞㠊 Ṗ㧊✲⪲ ῂ㎇♲┺.

㍲⽊⳾䎆⯒ ㌂㣿䞮㡂 䗖䂮⯒ 㩲㠊䞾㠦 㧞㠊㍲

䗖䂮㢖 ⳾䎆⯒ 1:1⪲ ⺆䂮䞮⓪ ộ㦖 ⿞Ṗ⓻䞮⸖⪲

Fig. 5㢖 ṯ㧊 䗖䂮⯒ 㰗㩧㩗㦒⪲ 㩲㠊䞮⓪ ㏢㑮㦮 Z-㿫 ⳾䎆㢖 Z-㿫 ⳾䎆㥚䂮㦮 㫛䣷⹿䟻 㤖㰗㧚㦚 ἆ㩫䞮⓪ X-, Y-㿫 2Ṳ㦮 ⳾䎆⪲ ῂ㎇♲ ㍲⽊⳾䎆

㎎䔎⯒ 䢲㣿䞮㡂 ┺㑮㦮 䗖䂮⯒ 㩲㠊䞲┺. Z-㿫 ⳾ 䎆Ṗ 㧚㦮㦮 䗖䂮㠦 ╖䞲 ⏨㧊 㩲㠊⯒ Ⱎ䂮Ợ ♮ Ⳋ Y-㿫 ⳾䎆Ṗ Z-㿫 ⳾䎆⯒ ┺㦢 䟟㦮 䗖䂮⪲ 㧊

㏷㔲䋺Ợ ♮Ⳇ, 䟊╏ 㡊㦮 䗖䂮㩲㠊Ṗ ⊳⋮Ợ ♮ Ⳋ X-㿫 ⳾䎆Ṗ Y-, Z-㿫 ⳾䎆⯒ ┺㦢 㡊⪲ 㧊㏷㔲 䋺⓪ ⹿⻫㦒⪲ 㑲㹾㩗㦒⪲ ⳾✶ 䗖䂮⯒ 㩲㠊䞲┺.

㍲⽊⳾䎆㦮 ㌂㟧 ㍶㩫㦚 㥚䞮㡂 䗖䂮㦮 䡫㌗Ἒ㑮

⯒ 㧊㣿䞲 䗖䂮㦮 ㌗䞮⳾㎮㠦 䞚㣪䞲 䏶䋂⯒ Ἒ

㌆䞮㡖┺. Fig. 6㠦 ㌂ṗ⋮㌂㦮 䡫㌗Ἒ㑮⯒ ☚㔲䞮 㡖㦒Ⳇ, 㔳 (2)㠦 䡫㌗Ἒ㑮⯒ ╖㧛䞮㡂 䗖䂮⯒ ㌗ 㔏㔲䋺₆ 㥚䞲 䞚㣪䏶䋂(Tu)㢖 䗖䂮⯒ 䞮ṫ㔲䋺₆ 㥚䞲 䞚㣪䏶䋂(Td)⯒ ṗṗ ㌆㿲䞮㡖┺.

G

X Y

X Y

Z-axis servo motor X-axis servo motor Y-axis servo motor Linear guide

G Fig. 5 Composition of servo motor setG G

Effective diameter (d_p) Effective diameter (d_p)

D

dp D

dp

X Y

dp

 F

P

N

f PN

L P

N

D Z

Y X

Y

dp

 F

P

N

f PN

L P

N

D Z

Y

G Fig. 6 Geometrical coefficient for rectangular screw

穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊VYW`G

G

2 cos

cos

2 cos

p p

u

p

p p

d

p

Pd d L

T d L

Pd d L

T d L

PS D

S D P

PS D

S D P









(2)

516# ⵞ൚᭒ᕲ#

2.2㩞㠦 㠎 䞲 ⹪㢖 ṯ㧊 ㍲⽊⳾䎆 ㎎䔎⯒ 䢲 㣿䞮㡂 㑲㹾㩗㦒⪲ 䗖䂮⯒ 㩲㠊䞾㠦 ➆⧒㍲ 䗖䂮 㢖 ㍲⽊⳾䎆Ṛ㦮 䌞㹿㧊 Ṗ⓻䞲 Ⲫ䄺┞㯮㦚 ㍺Ἒ 䟊㟒 䞲┺. Fig. 7ὒ ṯ㧊 䗖䂮㦮 ☢₆ ⿖⿚㧊 ⳾䎆 㦮 䢞ὒ ἆ䞿䞮㡂 ⳾䎆㦮 䣢㩚㤊☯㦚 䗖䂮㠦 ⿖ 㡂䞮☚⪳ ㍺Ἒ䞮㡖┺. 㧊㠦 ➆⧒ ⳾䎆 㩲㠊 䝚⪲

⁎⧾ ῂ㎇ 㔲 䗖䂮㢖 ⳾䎆 ἆ䞿 㰗㩚㠦 䗖䂮㦮 䣢㩚⨟ ⹥ ⳾䎆㦮 䣢㩚⨟㠦 ➆⯎ ἆ䞿 䣢㩚ṗ㦚 㺔㞚⌊⓪ 㞢ἶⰂ㯮㦚 㿪Ṗ䞮㡖┺.

61# ◶ඊᩖ⩂# ೆ᳆#

614# 㐪⼂ሼ⠞# ⅚⹆# ◶ඊᩖ⩂#

Ṗ⼖⁞䡫㦚 㧊㣿䞮㡂 3㹾㤦 ἷ䕦㦚 ㎇䡫䞮₆ 㥚䟊㍲ ⳿㩗ἷⳊὒ ⿖䞿䞮⓪ 3㹾㤦 ἷⳊ㦚 ῂ䡚 䟊㟒 䞮Ⳇ 㧊⯒ 㥚䟊㍲⓪ ṗṗ㦮 䗖䂮㢖 䕦㨂㦮 㩧㽟㩦㦚 㺔㞚⌊㠊 䗖䂮㦮 ⏨㧊⯒ ἆ㩫䟊㟒 䞲┺.

㧊 ὒ㩫㠦㍲㦮 㡺㹾⓪ ㎇䡫㡺㹾㢖 㰗ἆ♮⸖⪲ 㩫 䢫䞲 䗖䂮⏨㧊㦮 ㌆㿲㧊 㣪ῂ♮Ⳇ ⡦䞲 㩫䢫䞲

㍲⽊⳾䎆㦮 㩲㠊Ṗ 䞚㣪䞮┺. ⽎ 㡆ῂ㠦㍲⓪ 䗖䂮 䠺✲㦮 䡫㌗㦚 ‶㧒䞲 ἷ⮶⹮ἓ㦚 Ṗ㰖⓪ ⹮ῂ⪲

Ṗ㩫䞮㡖㦒Ⳇ, 䗖䂮⏨㧊 ㌆㿲 㞢ἶⰂ㯮㠦㍲⓪ 㧊

⩂䞲 䔏㎇㦚 䢲㣿䞮㡂 䗖䂮⏨㧊⯒ ㌆㿲䞲┺[1].

Fig. 7 Schematic diagram for joint module

䗖䂮䠺✲㢖 䕦㨂㦮 㩧㽟㦖 ἷⳊ 䡫㌗㠦 ➆⧒

㧚㦮㦮 㩦㠦㍲ 㧊⬾㠊㰖㰖Ⱒ 㩧㽟㩦㦖 ἷⳊ㌗㠦 㫊㨂䞮Ⳇ, 䗖䂮䠺✲㦮 䡫㌗㧊 ⹮ῂ㧚㦚 ἶ⩺䞮Ⳋ 䗖䂮㦮 㭧㕂㩦㦖 䗖䂮㦮 㩧㽟㩦ὒ ㌗ὖ㠜㧊 ἷⳊ 㠦㍲ 䗖䂮䠺✲㦮 ἷ⮶⹮ἓⰢ䋒 㡺䝚㎡ ♲ Ⳋ㌗㠦 㫊㨂䞲┺. 䗖䂮㦮 ㌗╖⏨㧊⯒ Ἒ㌆䞮₆ 㥚䟊㍲ 㤆

㍶㩗㦒⪲ 㡺䝚㎡ ♲ ἷⳊ㦚 X-Y䘟Ⳋ㠦 䒂㡗㔲䅲 Fig. 8ὒ ṯ㧊 㧧㦖 㣪㏢(element)⪲ ⋮⑚㠊㭖 ┺㦢 䗖䂮㦮 㭧㕂㧊 㫊㨂䞮⓪ 㣪㏢⯒ 㺔㞚⌎┺. 㣪㏢⯒

㺔⓪ ⹿⻫㦖 Fig. 8㠦 ☚㔲䞲 ộ㻮⩒ 䗖䂮㭧㕂㧊 㣪㏢ ⌊㠦 㫊㨂䞲┺Ⳋ 㣪㏢㦮 Ⳋ㩗ὒ 䗖䂮㭧㕂㠦 㦮䟊 ㌳㎇♮⓪ ⍺ Ṳ㦮 ㌒ṗ䡫 Ⳋ㩗㦮 䞿㦖 ṯ┺

⓪ 㫆Ị㦚 ㌂㣿䞲┺. 㣪㏢ ⌊㠦 䗖䂮 㭧㕂㧊 㫊㨂 䞮㰖 㞠㦒Ⳋ ㌒ṗ䡫 Ⳋ㩗㦮 䞿㦖 㣪㏢㦮 Ⳋ㩗⽊

┺ 䋊 ộ㧊┺. Fig. 9㦮 㣪㏢ 䘟Ⳋ⹿㩫㔳㦚 䢲㣿䞮 㡂 䗖䂮⏨㧊⯒ 㔳 (3)ὒ ṯ㧊 Ἒ㌆䞶 㑮 㧞┺[5].

1 1 1

2 1 4 1 4 1 2 1

4 1 2 1 2 1 4 1

4 1 2 1 4 1 2 1

F x x G y y Hz

z H

F y y z z y y z z

G x x z z x x z z

H y y x z x x y y

    

    

    

    

(3)

+ +

+ +

A4 A3

A2 A1

A4 A3

A2 A1

A3

A2 A1

A3

A2 A1

Out of surface

Inner point Projectile element

Fig. 8 Distinction of element including punch center

A&

B&

N& uA B& &

P& ^{P(x, y, z)} n₁(x₁, y₁, z₁)

n₂(x₂, y₂, z₂)

n₃(x₃, y₃, z₃) n₄(x₄, y₄, z₄)

Fig. 9 Plane equation and geometrical information for element

YXWGV穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊G G

Punch Position Data Comparison Operation

Flat sequence

Motion Path

Determination Flat Punch Control

sequence Punch Position Data

Comparison Operation Punch Position Data Comparison Operation

Flat sequence

Motion Path Determination

Motion Path

Determination Flat Punch ControlPunch Control sequence

(a) Overall flow chart For loop (i=0,1,…,M)

For loop (i=0,1,…,M)

For loop (j=0,1,…,N) For loop (j=0,1,…,N)

Loading of Before Position Data

Comparison Operation Loading of Current

Position Data

Punch Motion Data For loop (i=0,1,…,M)

For loop (i=0,1,…,M)

For loop (j=0,1,…,N) For loop (j=0,1,…,N)

Loading of Before Position Data Loading of Before

Position Data

Comparison Operation Comparison

Operation Loading of Current

Position Data Loading of Current

Position Data

Punch Motion Data Punch Motion

Data

(b) Punch position data comparison algorithm

For loop (i=0,1,…,M) For loop (i=0,1,…,M)

For loop (j=0,1,…,N) For loop (j=0,1,…,N)

Loading of Punch Motion Data Loading of Punch

Motion Data

Motion Path=1 Motion Path=1 Case

data>0.05 Case data>0.05

Yes

No

Motion Path=0 Motion Path=0

(c) Motion path determination algorithm

For loop (i=0,1,…,M) For loop (i=0,1,…,M)

For loop (j=0,1,…,N) For loop (j=0,1,…,N)

Loading of Motion Path Data Loading of Motion

Path Data Data AbstractionData Abstraction

Case Data=0

Case Data=0

Summation Summation

X-axis Movement

X-axis Movement Y-axis MovementY-axis Movement

Null Null

Z-axis Movement Z-axis Movement No

Yes

(d) Punch height control algorithm Fig.10 Flow chart for punch control

穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊VYXXG

G 615# 㐪⼂⣆♞# ◶ඊᩖ⩂#

䗖䂮㩲㠊 ⹿㔳㠦⓪ ἶ㩫㔳ὒ ⓻☯㔳 2Ṗ㰖㦮 䌖㧛㧊 㧞┺[3]. ⁎ 㭧 ㎇䡫 㔲 ㏢㣪♮⓪ 㔲Ṛ㧊

゚ᾦ㩗 㰽㦒Ⳇ, ┾㑲䞲 ἷⳊ ṖὋ㠦 㩗䞿䞲 ἶ㩫 㔳 䗖䂮㩲㠊 ⹿㔳㦚 ㌂㣿䞮㡖┺. ⡦䞲 ⳾✶ 䗖䂮 㠦 ㍲⽊⳾䎆⯒ 㧻㹿䞮Ợ ♮Ⳋ 䗖䂮⏨㧊 㩲㠊㠦

㏢㣪♮⓪ 㔲Ṛ㦚 䋂Ợ 㩞Ṧ䞶 㑮 㧞㦒⋮ ㍲⽊⳾

䎆Ṗ ἶṖ㦮 ⿖䛞㧊⸖⪲ ⳾✶ 䗖䂮㠦 1:1⪲ ㍲⽊

⳾䎆⯒ ⺆䂮䞮⓪ ◆⓪ ゚㣿㩗 䁷Ⳋ㠦㍲ ⶊⰂṖ 㧞㦒⸖⪲ 㫛䣷⹿䟻㦮 㤖㰗㧚㦚 ἆ㩫䞮⓪ ⳾䎆㢖 䗖䂮㦮 ⏨㧊 㫆㩞㠦 㰗㩧㩗㦒⪲ 㧊㣿♮⓪ ┺㑮㦮

㍲⽊⳾䎆 ㎎䔎⯒ 䢲㣿䞮㡂 ㍺Ἒ䞲┺. 䞲 㡞⪲ 䗖 䂮䋂₆Ṗ 25mm㧊ἶ ㎇䡫Ⳋ㩗㧊 250mmശ500mm 㧒 ἓ㤆 䗖䂮⺆㡊㦖 10ശ20㦮 䡫䌲Ṗ ♮Ⳇ, ㌗䞮

⿖ Ṗ⼖⁞䡫㠦 1:1⺆䂮⯒ 䞶 ἓ㤆 㽳 400Ṳ㦮 ⳾ 䎆Ṗ 䞚㣪䞮┺. ⡦䞲 䗖䂮㦮 䋂₆Ṗ 㧧㞚㰦㠦 ➆

⧒ ㍲⽊⳾䎆㦮 ὋṚ㧊 㭚㠊✺㠊 㩲㠊⳾✞㦮 ㍺Ἒ Ṗ ⽋㧷䟊㰚┺. ➆⧒㍲ 㩲䞲♲ 㑮㦮 ⳾䎆⯒ 䢲㣿 䞮㡂 ┺㑮㦮 䗖䂮⯒ 㩲㠊䞶 㑮 㧞⓪ ㍲⽊⳾䎆 ㎎ 䔎⯒ ㌂㣿䞮㡖┺.

㩚㼊㩗㧎 㩲㠊 䦦⯚☚⯒ Fig. 10(a)㠦 ☚㔲䞮㡖┺.

䋂Ợ 3Ṳ㦮 䕢䔎Ṗ 㑲㹾㩗㦒⪲ ῂ㎇♮㠊 㧞┺. 䡚 㨂 䗖䂮⺆㡊㧊 ῂ䡚䞮ἶ 㧞⓪ ㎇䡫ἷⳊ㠦 ╖䞲 䗖䂮⏨㧊㢖 3.1㩞㠦㍲ 㩲㔲䞲 䗖䂮⏨㧊 ㌆㿲 㞢ἶ Ⰲ㯮㠦 㦮䟊 Ἒ㌆♲ ㎇䡫ἷⳊ㠦 ╖䞲 䗖䂮⏨㧊⯒

゚ᾦ䞮㡂 ㍲⽊⳾䎆 ㎎䔎㦮 ῂ☯⹿䟻(motion path)㦚 ἆ㩫䞲┺. 㧊⓪ 3㹾㤦 ㎇䡫ἷⳊ ㌳㎇ 㔲Ṛ㦚 ┾㿫 㔲䋺₆ 㥚䞾㧊┺. 㧚㦮㦮 䗖䂮㦮 䡚㨂 䗖䂮⏨㧊㢖 ῂ䡚♮㠊㟒 䞶 䗖䂮⏨㧊Ṗ 㧒㩫 ⻪㥚 ⌊㠦㍲ 㧒 䂮䞲┺Ⳋ ῂ☯⹿䟻㠦㍲ 㩲㣎♲┺. ㌗₆ 㫆Ị㦚 Ⱒ 㫇䞮⓪ 䗖䂮㥚䂮⪲ ῂ㎇♲ ῂ☯⹿䟻㦚 ἆ㩫䞲 䤚 䗖䂮⏨㧊⯒ 㫆㩞䞲┺.

Fig. 10(b)⓪ 䗖䂮⏨㧊 ◆㧊䎆⯒ ゚ᾦ/㡆㌆䞮⓪ 㞢ἶⰂ㯮㧊┺. MശN㦮 䗖䂮⺆㡊㠦 ╖䟊㍲ ⳾✶

䗖䂮㦮 䡚㨂 ⏨㧊㢖 ῂ䡚♮㠊㟒 䞶 ⏨㧊 ◆㧊䎆

⯒ ⪲❿䞮㡂 㹾㦮 㩞╖Ṩ㦚 䗖䂮 ⳾㎮ ◆㧊䎆⪲

㍲ 㩖㧻䞲┺. 䗖䂮 ⳾㎮ ◆㧊䎆⯒ 㧊㣿䞮㡂 ῂ☯

⹿䟻㦚 ἆ㩫䞮⓪ 㞢ἶⰂ㯮㦖 Fig. 10(c)㠦 ☚㔲䞮㡖

┺. 䗖䂮 ⳾㎮ ◆㧊䎆⯒ ⪲❿䞮㡂 ⏨㧊㹾Ṗ 0.05 㧊㌗㧎 䗖䂮㠦 ╖䟊㍲ ῂ☯⹿䟻㦮 Ṩ㦒⪲ 1㦚 ⹮ 䢮䞮ἶ 0.05㧊䞮㧎 䗖䂮㠦 ╖䟊㍲ 0㦮 Ṩ㦚 ⹮䢮 䞲┺. Ⱎ㰖Ⱏ㦒⪲ 䗖䂮㩲㠊㠦 ╖䞲 㞢ἶⰂ㯮㦚 Fig. 10(d)㠦 ☚㔲䞮㡖┺. kṲ㦮 䗖䂮⏨㧊 㫆㩞 ⳾ 䎆Ṗ 㧞㦚 ἓ㤆 ṗṗ㦮 Z-㿫 ⳾䎆㠦 ╖䞲 ῂ☯⹿

䟻 ◆㧊䎆⯒ ⪲❿䞮㡂 䗖䂮㠦 ╖䞲 ῂ☯⹿䟻㦮

Ṩ㦚 䞿䞲┺. ἆὒṖ 0㧒 ἓ㤆 㯟, 䡚㨂 㩲㠊╖㌗

㧎 kṲ㦮 䗖䂮㠦 ╖䞲 ῂ☯⹿䟻 ◆㧊䎆㦮 䞿㧊 0 㧊Ⳋ 䟊╏䗖䂮㠦 ╖䞲 ⏨㧊㩲㠊⓪ ㌳⨋♲┺. 䞿㌆

ἆὒṖ 0㧊 㞚┢ 䗖䂮㥚䂮⪲ 㧊☯ 䤚 㼊ἆ ⳾✞

㦮 ἆ䞿㦚 㥚䞮㡂 䣢㩚ṗⰢ䋒 㫆㩞䞮Ⳇ, ἆ䞿 䤚 䗖䂮⏨㧊⯒ 㩲㠊䞲┺. 䗖䂮⏨㧊 㫆㩞 㞢ἶⰂ㯮㠦

⓪ 㫆㧎䔎 ⳾✞㦮 䌞㹿Ὃ㩫㧊 䙂䞾♮㠊 㧞㦒Ⳇ,

㌗㣿 䝚⪲⁎⧾㧎 LABVIEW 8.6㦚 ㌂㣿䞮㡂 ῂ䡚 䞮㡖┺.

71# ಪᵪາ㚿ೆ᳆#

(a) Punch module

(b) Combination of joint module Fig.11 Flexible die

714# ಪᵪາ㚿# ⎆⣆⠻#

㔲㩲㧧♲ Ṗ⼖⁞䡫㦮 䗖䂮䋂₆⓪ 20mm㧊ἶ ㎇ 䡫Ⳋ㩗㦖 200mmശ300mm㧊┺. ➆⧒㍲ 䗖䂮⳾✞㦖 10ശ15㦮 䗖䂮⺆㡊㦚 Ṗ㰚┺. ㍲⽊⳾䎆 ㎎䔎⓪ 2 Ṳ㦮 Z-㿫 ⳾䎆㢖 㧊✺㦮 㫛䣷⹿䟻㦮 㥚䂮⯒ ἆ㩫 䞮⓪ X-㢖 Y-㿫 ⳾䎆 㽳 4Ṳ㦮 ㍲⽊⳾䎆⪲ ῂ㎇♮

㠊 㧞┺. ⡦䞲 㼊ἆ ⳾✞㦮 䌞㹿㦖 㥶㞫 㩲㠊⹿㔳 㦒⪲ 㩲㧧䞮㡖┺. Fig. 11(a)⓪ ⽎ 㡆ῂ⯒ 䐋䟊 Ṳ⹲

YXYGV穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊G G

♲ Ṗ⼖⁞䡫㦮 䗖䂮⳾✞㧊┺. 䗖䂮㌂㧊 Ṛỿ㧊 ⍞ ⶊ 㧧㦒Ⳋ 䗖䂮Ṛ㦮 Ⱎ㺆㠦 㦮䟊 ㍲ ⽊⳾䎆㠦 ὒ

⿖䞮Ợ ỎⰂỢ ♮Ⳇ, ⹮╖⪲ 䗖䂮Ṛ㦮 Ṛỿ㧊䄺㰖 Ⳋ 䗖䂮Ṗ 㫢㤆⪲ 䦪✺ⰂỢ ♮㠊 Ṗ⼖⁞䡫㦚 䐋 䟊 ῂ䡚♲ 3㹾㤦 ㎇䡫ἷⳊ㧊 ⳿㩗ἷⳊὒ 㧒䂮䞮 㰖 㞠㞚 ㎇䡫㡺㹾⯒ ⹲㌳㔲䋾┺. ➆⧒㍲ 䗖䂮Ṛ㦮 Ṛỿ ⹥ ㌂㧊✲ 䝚⩞㧚ὒ 䗖䂮⺆㡊Ṛ㦮 Ṛỿ㡺㹾

⯒ 㾲╖䞲 㭚㡂㟒 䞲┺.

Fig. 11(b)⓪ 㼊ἆ ⳾✞ὒ 䗖䂮 㫆㧎䔎 ⿖⿚㦚 ☚ 㔲䞮ἶ 㧞┺. 3.1㩞㠦 㠎 ♲ 䗖䂮⏨㧊 ㌆㿲 㞢ἶ Ⰲ㯮㦚 ㌂㣿䞮㡂 䗖䂮 ⏨㧊 ◆㧊䎆⯒ ㌆㿲䞮Ⳇ, 3.2㩞㦮 䗖䂮㩲㠊 䝚⪲⁎⧾ὒ ㍲⽊⳾䎆 ㎎䔎⯒ ㌂ 㣿䞮㡂 3㹾㤦 ㎇䡫ἷⳊ㦚 ῂ䡚䞲┺. 㧊 ὒ㩫㠦㍲

㼊ἆ ⳾✞㦖 䗖䂮㢖 ㍲⽊⳾䎆Ṛ㦮 䌞㹿㦚 Ṗ⓻䞮 Ợ 䞮㡂 ㍲⽊⳾䎆 ㎎䔎⯒ 㧊㣿䞲 ┺㑮㦮 䗖䂮⏨

㧊⯒ 㑲㹾㩗㦒⪲ 㩲㠊 Ṗ⓻䞮Ợ 䞲┺.

715#6Ⳓ❺# ⇛㚿උᬞ# ถ㚮#

Fig. 12㢖 ṯ㧊 㔲㩲㧧♲ Ṗ⼖⁞䡫㦚 㧊㣿䞮㡂

㌳㎇♲ 400mm㦮 ┾㧒ἷ⮶⹮ἓ㦚 Ṗ㰖⓪ 䙂ⶒ㍶

䡫䌲㦮 ㎇䡫ἷⳊ㦚 㧊㣿䞮㡂 㓺䔎⩞䂮 ㎇䡫㔺䠮 㦚 㑮䟟䞮㡖┺. 䗖䂮⳾✞ὒ 1mm㦮 㞢⬾⹎ⓚ ㏢㨂

㌂㧊㦮 㩦 㩧㽟㠦 㦮䞲 㓺䋂⧮䂮 ❇㦮 ἆ䞾㦚 㾲

㏢䢪䞮₆ 㥚䞮㡂 5mm㦮 㤆⩞䌚 䕾✲⯒ ㌂㣿䞲 ἆὒ ㏢㨂 䚲Ⳋ㦮 ἆ䞾㦖 ㌳㎇♮㰖 㞠㞮㦒Ⳇ, ㎇ 䡫♲ ㏢㨂㦮 3㹾㤦 䡫㌗ 䁷㩫 ἆὒ⪲㍲ 㧎㧻⹿䟻 㦒⪲㦮 ἷ⮶⿚䙂⯒ ☚㔲䞮㡖┺. ⡦䞲 ╖䃃Ⳋ㦚 ₆ 㭖㦒⪲ 䞲 ㎇䡫㡗㡃㠦 ╖䞲 䁷㩫ἆὒ㢖 ⳿㩗ἷⳊ 㦮 㧎㧻⹿䟻 ἷ⮶⿚䙂⯒ Fig. 13㠦 ゚ᾦ䞮㡂 ☚㔲 䞲 ἆὒ ⳿㩗ἷⳊὒ⓪ ┺㏢ 㹾㧊⯒ ⽊㧊ἶ 㧞┺.

㎇䡫㡺㹾㦮 㤦㧎㦖 ㏢㨂㦮 䌚㎇䣢⽋ ⹥ Ṗ⼖⁞䡫 㦮 㡺㹾⪲ 㧎䟊 ⹲㌳䞲 ộ㦒⪲ 㡞䁷♲┺. ➆⧒㍲

Ṗ⼖⁞䡫㦮 㩫⹖☚ 䟻㌗ ⹥ 䌚㎇䣢⽋㠦 ╖䞲 ⽊ 㩫㍺Ἒ㠦 ╖䞲 㿪Ṗ㩗㧎 㡆ῂṖ 䞚㣪䞶 ộ㦒⪲

䕦┾♲┺. 䞮㰖Ⱒ ⽎ 㡆ῂ⯒ 䐋䟊 Ṳ⹲♲ Ṗ⼖⁞

䡫㦖 ₆㫊㦮 ┾㧒⁞䡫㦚 ╖㼊䞮㡂 ┺䛞㫛 ㏢⨟㌳

㌆ 㼊㩲㦮 ㌆㠛ῂ㫆㠦 ⿖䞿䞮⓪ ┺㟧䞲 ㎇䡫Ὃ㩫 Ṳ⹲㠦 䢲㣿♶ 㑮 㧞㦚 ộ㧊┺.

# 81# ൚# ᤊ#

⽎ 㡆ῂ㠦㍲⓪ ┺䛞㫛 ㏢⨟㌳㌆ 㼊㩲⪲㦮 ㌆㠛 ῂ㫆 㩚䢮㠦 ➆⯎ 㔶 Ṳ⎦㦮 ㎇䡫Ὃ㩫 Ṳ⹲㦚 㥚 䞲 Ṗ⼖⁞䡫㦚 ㍺Ἒ䞮㡖ἶ 㧊⯒ 㧊㣿䞮㡂 3㹾㤦

㎇䡫ἷⳊ ῂ䡚䞮㡖┺.

1 2

Fig.12 Stretch forming test using flexible die

#

#

direction

(1) ₆⓻⼚⪲ ῂ⿚ ♮㠊㰚 䗖䂮, 㩲㠊, 㼊ἆ ⳾

✞㠦 ╖䞲 ㎎⿖㩗㧎 ㍺Ἒ⯒ 㑮䟟䞮㡖┺. 䗖䂮⳾✞

㦖 䗖䂮䋂₆ ⹥ ㎇䡫Ⳋ㩗㠦 㦮䟊 ἆ㩫♮⓪ 䗖䂮

⺆㡊ὒ ㎇䡫䞮㭧㦚 㰖䍇䞮⓪ ㌂㧊✲ ⹥ 䞮⿖ 䝚

⩞㧚㦒⪲ ῂ㎇♮㠞┺. 㩲㠊⳾✞㦖 㾲㏢㦮 ゚㣿㦒

⪲ ┺㑮㦮 䗖䂮⯒ 䣾㥾㩗㦒⪲ 㫆㩞䞮₆ 㥚䟊 ㍲

⽊⳾䎆 ㎎䔎⯒ 㧊㣿䞮㡖㦒Ⳇ, 㾲㏢䞚㣪䏶䋂⯒ Ἒ

㌆䞮㡂 ㍲⽊⳾䎆㦮 ㌂㟧㦚 ἆ㩫䞮㡖┺. Ⱎ㰖Ⱏ㦒

⪲ ㍲⽊⳾䎆 ㎎䔎㦮 㑲㹾㩗 㩲㠊⯒ 㥚䟊 䗖䂮㢖

⳾䎆Ṛ㦮 䌞㹿㧊 Ṗ⓻䞮☚⪳ 㼊ἆ ⳾✞㦚 ㍺Ἒ䞮

穢剳暒昷儆击穟箒滆V洢YW劒G 洢Z笾SGYWXX噊VYXZG

G

(2) 䞮✲㤾㠊 ㍺Ἒ㠦 㧊㠊㍲ 䗖䂮⳾✞㧊 ⳿㩗ἷ Ⳋὒ ⿖䞿䞮⓪ 3㹾㤦 ㎇䡫ἷⳊ㦮 ῂ䡚㦚 㥚䞲 䗖 䂮⏨㧊 ㌆㿲 㞢ἶⰂ㯮㦚 㩲㔲䞮㡖┺.

(3) 䗖䂮⏨㧊 ㌆㿲 㞢ἶⰂ㯮㠦 㦮䟊 Ἒ㌆♲ 䗖 䂮⏨㧊 ◆㧊䎆⯒ 㧊㣿䞲 䗖䂮㩲㠊 㞢ἶⰂ㯮㦚 㩲 㔲䞮㡖┺. 䗖䂮⏨㧊 ゚ᾦ㡆㌆㦚 䐋䟊 ῂ☯⹿䟻㦚 ἆ㩫䞮Ⳇ, 㧊㠦 ➆⧒ 㑲㹾㩗㦒⪲ 䗖䂮⯒ 㩲㠊䞮㡂 3㹾㤦 ㎇䡫ἷⳊ ῂ䡚㠦 ㏢㣪♮⓪ 㔲Ṛ㦚 㾲㏢䢪 䞮㡖┺.

(4) 䗖䂮, 㩲㠊, 㼊ἆ ⳾✞⪲ ῂ㎇♲ Ṗ⼖⁞䡫㦚 㔲㩲㧧䞮㡖㦒Ⳇ, 㧊⯒ 㧊㣿䞮㡂 3㹾㤦 ㎇䡫ἷⳊ㦮 ῂ䡚 ⹥ ㎇䡫㔺䠮㦚 㑮䟟䞮㡖┺.

㝮 ໚ G

㧊 ⏒ⶎ㦖 2008⎚☚ ὒ䞯₆㑶⿖㦮 㨂㤦㦒⪲ 䞲 ῃὒ䞯㨂┾㦮 㰖㤦㦚 ⹱㞚 㑮䟟♲ 㡆ῂ㧛┞┺(No.

R0A-2008-000-20017-0). ⡦䞲, ὒ䞯₆㑶⿖/䞲ῃὒ䞯 㨂┾ ῃṖ䟋㕂㡆ῂ㎒䎆㌂㠛(No. R15-2006-022-02002- 0)㦮 ⿖⿚㩗 㰖㤦㠦 㦮䞮㡂 㑮䟟♮㠞㦒Ⳇ 㧊㠦 ὖ Ἒ㧦 㡂⩂⿚✺℮ Ṧ㌂✲Ⱃ┞┺.

Ⳣ ඊ ᯢ 㙶

[1] S. C. Heo, Y. H. Seo, T. W. Ku, J. Kim, B. S. Kang, 2009, Study on application of flexible die to sheet

metal forming process, Trans. Mater. Process., Vol.

18, No. 7, pp. 556~564.

[2] S. C. Heo, Y. H. Seo, J. W. Park, T. W. Ku, J. Kim, B. S. Kang, 2008, Numerical and experimental study on plate forming process using flexible die, Trans. Mater. Process., Vol. 17, No. 8, pp. 570~578.

[3] Y. H. Seo, S. C. Heo, J. W. Park, T. W. Ku, W. J.

Song, J. Kim, B. S. Kang, 2010, Development of stretch forming apparatus using flexible die, Trans.

Mater. Process., Vol. 19, No. 1, pp. 17~24.

[4] Z. Y. Cai, S. H. Wang, X. D. Xu, M. Z. Li, 2009, Numerical simulation for the multi-point stretch forming process of sheet metal, J. Mater. Process.

Technol., Vol. 209, pp. 396~407.

[5] K. A. Pasch, 1981, Design of a discrete die surface for sheet metal forming, S.B. Theis, Department of Mechanical Engineering, Massachusetts Institute of Technology.

[6] M. Z. Li, Y. H. Liu, S. Z. Su, G. Q. Li, 1999, Multi point forming: a flexible manufacturing method for a 3-D surface sheet, J. Mater. Process. Technol., Vol.

87, Issues 1-3, pp. 277~280.

[7] L. Li, Y. H. Seo, S. C. Heo, B. S. Knag, J. Kim, 2010, Numerical simulations on reducing the unloading springback with multi-step multi-point forming technology, Int. J. Adv. Manuf. Technol., Vol. 48, pp. 45~61.