Study on a New Semi-Solid Injection Molding Method for Heat-Resistant Magnesium Alloys
ņ Trial Production and Process Verification of Machine ņ
Tatsuya TANAKA*, Yutaka IMAIDA*, Kenji SHINOZAKI**, Makoto YOSHIDA***, Toshio FUJII****
(Received May 7, 2010)
Based on the experiment result of semi-solid injection molding machine which has the mold clamp force of 20 tonf reported previously, the trial model with the mold clamp force of 200 tonf was designed and then was manufactured. By using this trial model, accuracy of the control method of semi-solid temperature zone was verified, and it was checked that a solid phase rate could fabricate at least 30%. As the result of the trial test by same molding conditions, it was clarified that mobility differed by the molten state and the semi-solid one. And it was checked that there were many merits by comparing this new semi-solid injection molding process with the conventional die casting. In order to verify this new process, trial production molding of the clutch piston which was a main part of a car was carried out. At this time, in order to obtain the clutch piston without defect, an experimental design was used. Durability was evaluated using an equipment which allowed repeated load on a clutch piston without defect. As a result, trial production parts were inferior to the conventional parts made from aluminum alloy. In order to conquer this problem, it turned out that the part shape which was suitable for the Magnesium alloy of low rigidity compared with the aluminum alloy should be designed.
-G[YQTFU semi-solid processing, injection molding, magnesium, heat-resistance, solidification crack
ࠠࡢ࠼㩷ඨಝ࿕ടᎿ㧘ᚑᒻ㧘ࡑࠣࡀࠪ࠙ࡓ㧘⠴ᾲᕈ㧘ಝ࿕ഀࠇ
⠴ᾲ /I ว㊄↪ᣂඨಝ࿕ᚑᒻࡊࡠࠬߩ⎇ⓥ㧔╙ੑႎ㧕
֣֣ᣂဳ VQP ဳ✦ജඨಝ࿕ᚑᒻᯏߩ⹜ߣᦨㆡᚑᒻ᧦ઙ֣֣
↰ਛ ㆐㧘↰ ⼾㧘◉ፒ ⾫ੑ㧘ศ↰ ⺈㧘⮮ ᢅᄦ
* Department of Mechanical and Systems Engineering, Doshisha University, Kyoto Tel: +81-774-65-6465, FAX: +81-774-65-6465, E-mail:tatanaka@mail.doshisha.ac.jp
** Department of Mechanical System Engineering, Graduate School of Engineering, Hiroshima University, Hiroshima
*** Department of Material Science and Engineering, Waseda University, Tokyo
**** Western Hiroshima Prefecture Industrial Institute, Kure, Hiroshima
㧚ߪߓߦ
ㄭᐕ㧘ⅣႺ߳ߩ㗴߆ࠄ᷷ᥦൻࠟࠬߢࠆ CO2ᷫߩߚߩദജ߇⇇ਛߢߥߐࠇߡࠆ㧚
CO2⊒↢ߩ18.5㧑㧔ㆇャㇱ㐷ߩว⸘㧕ࠍභࠆ⥄േ
ゞ↥ᬺߢߪ㧘㔚᳇⥄േゞ߿ࠟ࠰ࡦࠛࡦࠫࡦߣ૬↪
ߔࠆࡂࠗࡉ࠶࠼ゞߩ᥉߇⪺ߒ㧚ߘߒߡ㧘േജ Ḯߩᄙ᭽ൻߛߌߢߪߥߊ㧘ゞシ㊂ൻߩ⋡⊛߆ࠄ㜞
ᒝᐲߩ㜞ᒛജ㍑᧼ߩ᭴ㅧㇱຠ߳ߩ↪߇Ⴧ߃ߡ
ࠆ㧚ߐࠄߦ㧘ࠕ࡞ࡒ࠾࠙ࡓ㧔AƐ㧕ว㊄߿ታ↪㊄ዻਛ ߢᦨ߽ૐኒᐲߩࡑࠣࡀࠪ࠙ࡓ㧔Mg㧕ว㊄ߩ⥄േゞ ㇱຠ߳ߩㆡ↪߽Ⴧടߒߡ߅ࠅ㧘ߎࠇࠄߩ᧚ᢱߦࠃࠆ シ㊂ൻߩᦼᓙߪᄢ߈㧚
৻⥸ߦ㧘シว㊄⥄േゞㇱຠߪ㧘ᄢ㊂↢↥ߦะ
ߡࠆ࠳ࠗࠞࠬ࠻ᚑᒻ߇↪ߐࠇࠆߎߣ߇ᄙ㧚ߒ
߆ߒ㧘ᓥ᧪ߩ࠳ࠗࠞࠬ࠻ᴺߢᚑᒻߔࠆ႐ว㧘ᚑᒻਛ ߦᒻᚑߐࠇࠆᒁߌᎽ߿⎕ᢿ࠴࡞ߥߤߦࠃࠆᰳ㒱ߩ ሽߦࠃࠅ㧘ᒝᐲߩା㗬ᕈߦਲߒߊ㧘㊀ⷐㇱߦ
↪ߐࠇߡࠆߣߪ⸒㔍㧚৻ᣇ㧘1970ᐕઍᓟඨߦ
MITߩFlemings1)ߦࠃߞߡឭ᩺ߐࠇߚඨṁⲢඨಝ
࿕ࡊࡠࠬߪ㧘࠳ࠗࠞࠬ࠻ᚑᒻᴺߩ⺖㗴⸃ᶖ߳ߩᦼ ᓙ߆ࠄ㧘߽ฦ࿖ߢ⎇ⓥ㐿⊒߇⛯ߌࠄࠇߡࠆ2,3)㧚
⪺⠪ࠄߪ㧘᮸⢽↪ᚑᒻᯏࠍᡷㅧߒ㧘⠴ᾲ Mg ว㊄↪ߩၮ␆ታ㛎↪ඨಝ࿕ᚑᒻᯏࠍ⹜ߒߚ4)㧚 ߘߒߡ㧘ⵝ⟎⸳ቯ᷷ᐲߣඨಝ࿕ࠬߩ࿕⋧₸᷹
ቯ߆ࠄ㧘ⵝ⟎ߩ᷷ᐲᓮᕈߣߘࠇߦ߁ඨಝ࿕ࠬ
↢ᚑ᧦ઙߩᛠី㧘ߐࠄߦߪඨಝ࿕ᚑᒻᴺߩᒁߌ Ꮍᰳ㒱㒰߳ߩലᕈߦߟߡࠄ߆ߦߒߚ㧚
ᧄ⎇ⓥߢߪ㧘వߕၮ␆ታ㛎↪ඨಝ࿕ᚑᒻᯏ4) ߢขᓧߒߚၮ␆࠺࠲ࠍࡌࠬߦ⸳⸘ߩࠬࠤ࡞
ࠕ࠶ࡊࠍ⹜ߺ㧘873K એߢ↪น⢻ߢ㧘ታ↪ൻࠍ
⋡ᜰߒߚဳ✦ജ200tonߩMg↪ඨಝ࿕ᚑᒻᯏ ࠍ⹜ߒߚ5)㧚ߘߒߡ㧘⹜ᚑᒻⵝ⟎ߦࠃࠆታ㛎߆ ࠄ㧘ඨಝ࿕ࠬ↢ᚑ᧦ઙࠍࠄ߆ߦߒ㧘᷷ᐲ
ᓮߩലᕈߦߟߡᬌ⸽ߒߚ㧚ߘߩߢ㧘ౕ⊛ߥ ㇱຠ߳ߩㆡ↪ߣߒߡ㧘⥄േゞㇱຠߩࠢ࠶࠴ࡇࠬ
࠻ࡦࠍᚑᒻߒ㧘ᦨㆡᚑᒻ᧦ઙࠍᛠីߒᚑᒻຠߩ․ᕈ
⹏ଔࠍⴕ߁ߎߣߢ㧘ᧄࡊࡠࠬߩലᕈࠍࠄ߆ߦ ߔࠆߎߣࠍ⋡⊛ߣߒߚ㧚ᚑᒻታ㛎ߦߪ㧘Mg ว㊄ߩ
⠴ᾲᕈะߩ⋡⊛ߢ Ca ߇ᷝടߐࠇߚ AZ91D ߿ AM60ࠃࠅඨಝ࿕᷷ᐲ㗔ၞ߇⁜ߊ㧘ߐࠄߦ㔍ടᎿ᧚ ᢱߣߥߞߡࠆ⠴ᾲMgว㊄5)ࠍ↪ߒߚ㧚
㧚VQP ඨಝ࿕ᚑᒻⵝ⟎ߩ⹜
㧚 VQP ඨಝ࿕ᚑᒻⵝ⟎ߩၮᧄࠦࡦࡊ࠻
Fig.1ߦߪ㧘ၮ␆ታ㛎↪ߦ⹜ߒߚဳ✦ജ20ton
ߩඨಝ࿕ᚑᒻᯏߩᮨᑼ࿑ࠍ␜ߔ4)㧚ᧄⵝ⟎ߪ᮸
⢽↪ࠗࡦࠗࡦᑼ❑ဳᚑᒻᯏߩࡃ࡞߅ࠃ߮
ࠬࠢࡘㇱࠍ㜞᷷↪ߣߒߡ㋕♽⠴ᾲ㍑ߦᡷㅧߒ㧘ࠪ
ࡖ࠶࠻ࠝࡈࡃ࡞ࡉࠍઃਈߔࠆ╬㧘ᧄࡊࡠࠬߩല ᕈࠍᬌ⸽ߔࠆߚߦ⹜ߒߚ߽ߩߢࠆ㧚↪ߔࠆ Mgṁḡߪ1㨪ᢙPa㨯sߣ᮸⢽ߦᲧߴߡ㕖Ᏹߦ☼ᕈ߇ ૐߊ㧘ඨಝ࿕⁁ᘒ㧔ᵹേน⢻ߥ࿕⋧₸30㨪40wt%એ ਅ㧕ߢ߽᮸⢽ߩ☼ᕈߢࠆ100㨪1000Pa㨯s⒟ᐲ߹ߢ Ⴧടߒߥ㧚ߘߩߚ㧘ࠗࡦࠗࡦᣇᑼߩᚑᒻ
ᯏߩᄢ߈ߥࡔ࠶࠻ߢࠆ࠴ࠚ࠶ࠢࡦࠣᯏ⢻ߢ ߪ㧘ṳᵨࠍ㒐߉ᓟߩജࠍᜬߔࠆ㧔એਅ㧘
ᤨജ㧕ߎߣߪ㔍ߒߎߣ߇ಽ߆ߞߡࠆ4)㧚
ߘߎߢ㧘ታ↪ൻࠍ⋡ᜰߔ 200ton ඨಝ࿕ᚑᒻ ᯏߩၮᧄⵝ⟎᭴ᚑߪ㧘ඨಝ࿕ࠬࠍᠣᜈ↢ᚑߔ ࠆࠬࠢࡘᷙ✵ㇱߣ㊄ဳౝߦࠬࠍ㜞ㅦ㜞
ߢߔࠆࡊࡦࠫࡖㇱࠍಽഀߒߚࡊࡊ
ࡦࠫࡖᣇᑼࠍណ↪ߒߚ㧚ਥⷐㇱߪ㧘Fig.2 ߦ␜ߔࠃ ߁ߦ㧘ࠬࠢࡘᷙ✵ㇱ㧘ࡊࡦࠫࡖㇱߣၮ␆ታ Fig.1. Schematic illustration of lab molding machine.
Screw mixing part
Shut-off valve
Plunger injection part
Nozzle
Screw mixing part
Shut-off valve
Plunger injection part
Nozzle
Fig.2. Schematic illustration of the trial injection molding machine at clamp force 200ton.
㛎ᯏߣห᭽ߦࠪࡖ࠶࠻ࠝࡈࡃ࡞ࡉㇱ߆ࠄ᭴ᚑߐࠇ ࠆ㧚ࠪࡖ࠶࠻ࠝࡈࡃ࡞ࡉㇱߪ㧘࿁ォᑼߩ㐿㐽ᑯߢ⸘
㊂ᤨߦ㊄ဳౝ߳ߩMgߩᵹࠍ㒐ߋ㧚߹ߚ㧘ṁḡ߿
ඨಝ࿕ࠬߪ㧘ࠬࠢࡘߦࠃࠆߒᵹേ߇࿎
㔍ߥߚ㧘వߩၮ␆ታ㛎ᯏߣห᭽ߦ㧘⥄㊀ߦࠃࠆᵹ
േࠍᦼᓙߒߡࠬࠢࡘᷙ✵ㇱߪ❑㈩⟎ߣߒߚ㧚߹ߚ㧘
ᤨߪ㧘ࠬࠢࡘ߇ਅ㒠ߒ㧘ࠬࠢࡘࡋ࠶࠼ㇱߢ
ㇱࠍቢోߦኒ㐽ߒߚ⁁ᘒߦߔࠆߎߣ߇᧪ࠆ㧚
VQP ඨಝ࿕ᚑᒻᯏߩਥ᭽
ฦㇱߩኸᴺቯߦ㓙ߒ㧘ࠬ↢ᚑᤨ߅ࠃ߮
ᤨߩᔅⷐ᧦ઙ߆ࠄਥ᭽ࠍቯߒߚ㧚Table 1 ߦᧄⵝ⟎ߩਥ᭽ࠍ␜ߔ㧚Mgว㊄ߪᲧᾲ߇ዊߐߊ
಄ළߒ߿ߔߚ㧘৻⥸ߦߪ㜞ㅦ㜞ߢߩ㊄ဳౝ
߳ߩలႯ߇ᔅⷐߣߐࠇߡࠆ㧚ඨಝ࿕᧚ߪ㧘ቢోṁ Ⲣ᧚ࠃࠅߐࠄߦᾲ㊂߇ዊߐߚ㧘ᤨߩࡊࡦ
ࠫࡖߩᦨᄢㅦᐲࠍ4m/s㧘ߐࠄߦߪ┙ߜ߇ࠅࠍㅦߊ ߔࠆߚടㅦᐲࠍ40Gએ㧘ᦨᄢജࠍ70MPa ߣ⸳ቯߒߚ㧚
ඨಝ࿕ᚑᒻᯏߩേේℂ
Fig.3 ߦᧄඨಝ࿕ᚑᒻᯏߩേේℂࠍ␜ߔ㧚
ඨಝ࿕ࠬ↢ᚑߔࠆߚߩࠬࠢࡘᷙ✵ㇱߩ
ࠬࠢࡘߪ㧘ࠨࠗࠢ࡞㐿ᆎ೨ߦߪਅ㒠㧔೨ㅴ㧕ߒߡ
ࠆ㧚ߘߒߡ㧘(a)Mgว㊄ࠬߩ⸘㊂ᤨߦ੍
⸳ቯߒߚኈ㊂ߣߥࠆ⟎߹ߢṁḡࠍ಄ළᡬᜈ ߒߥ߇ࠄߔࠆ㧚ᰴߦ㧘(b)⸳ቯߒߚㅦᐲߢࠬࠢ
ࡘ߇ਅ㒠ߒ㧘ඨಝ࿕ࠬࠍᠣᜈߒߥ߇ࠄࡊࡦ
ࠫࡖㇱ߳⒖ㅍߔࠆߣหᤨߦ㧘ࠬࠢࡘࡋ࠶࠼ㇱ ߇ኽᱛᑯߣߥࠅㇱ߳ߩᵹ〝ࠍ㐽㎮ߔࠆ㧚ߎߩᤨ㧘
ࠪࡖ࠶࠻ࠝࡈࡃ࡞ࡉߪ㧘㐽ߓߚ⁁ᘒߢ⸘㊂ᤨߩ㊄ဳ
ౝ߳ߩMgߩᵹࠍ㒐ߋ㧚ߘߩᓟ㧘(c)ࡊࡦࠫࡖߦ ࠃࠆേߩ㐿ᆎߣหᤨߦࠪࡖ࠶࠻ࠝࡈࡃ࡞ࡉ ߪ㐿ߣߥࠅ㧘ඨಝ࿕ࠬ߇ࡁ࠭࡞ࠍㅢߞߡ㊄ဳ
ౝ߳ߐࠇࠆ㧚ߘߒߡ㧘಄ළᓟ㧘(d)ဳ߇㐿߈ᚑᒻ
ຠ߇ขࠅߐࠇࠆ㧚
Fig.4 ߦ⹜ߒߚඨಝ࿕ᚑᒻᯏߩో㈩⟎࿑
ࠍ␜ߔ㧚ૉߒ㧘Mgว㊄ࠍṁ⸃ߔࠆἹߪ㒰ߡࠆ㧚
ඨಝ࿕ᚑᒻᯏߩᕈ⢻ᬌ⸽
⹜ߒߚဳ✦ജ 200ton ߩඨಝ࿕ᚑᒻᯏࠍ
↪ߡ㧘᷷ᐲᓮᕈ㧘ㅦᐲ㧘ടㅦᐲ㧘ᜬജ
╬ߦߟߡߩᕈ⢻⹏ଔࠍⴕߞߚ㧚⹏ଔߦ↪ߒߚ Mgว㊄᧚ᢱߪAM♽ߦCaࠍᢙ%ᷝടߒ⠴ᾲᕈࠍะ
(a)Metering (Valve shut)
(b)Filling (Valve shut)
(d)Product extraction
(c)Injection (Valve off) (a)Metering (Valve shut)
(b)Filling (Valve shut)
(d)Product extraction
(c)Injection (Valve off) Fig.3. The principle of operation of semi-solid
injection molding machine.
Fig.4. The arrangement plan of a mechanical apparatus.
Table 1. The main specification of the trial injection molding machine at clamp force 200ton.
Item Main specification
Injection speed Maximum 4 m/s Acceleration at injection Minimum 40G Hold pressure at injection Maximum 70MPa
Capacity at injection 430cm3 Semi-solid ratio Maximum 30±5 % Vacuum in mold less than 5kPa
Cycle time less than 60sec Measurement accuracy less than ±1%
Clamp force 2000kN
ߐߖߚAMC403㧔Mg-4mass% Al-3mass% Ca㧦᷹
ቯ⚿ᨐࠃࠅ㧘ṁ⸃ὐ882K㧘ಝ࿕ὐ833K㧕6)ߢࠆ㧚
ฦㇱߩ᷷ᐲᓮᕈ
Fig.5 ߦ㧘ਥⷐ᭴ᚑㇱಽߢࠆࠬࠢࡘᷙ✵ㇱ߅
ࠃ߮ࡊࡦࠫࡖㇱߢߩᾲ㔚ኻߦࠃࠆ᷷ᐲ᷹ቯ
⟎ࠍ␜ߔ㧚ࠬࠢࡘᷙ✵ㇱߪ SB㧘ࡊࡦࠫࡖ
ㇱߪPBߣߒߡߐࠇߡࠆ㧚߹ߚ㧘᷹ቯ♖ᐲ ะߩߚ㧘ోߡߩㇱಽߦ᷷ᐲ⸳ቯ↪ߩᾲ㔚ኻߩㄭ றߦታ᷹ቯ↪ߩᾲ㔚ኻࠍ㈩⟎ߒ㧘ࠬࠢࡘᷙ✵ㇱߪ㧘
ᣇะߢ180ᐲ⋧ኻะߩ⟎ߦ߽ᾲ㔚ኻࠍ㈩⟎
ߒ㧘ᷝ߃ሼߩ1ߣ2ߢ␜ߔ㧚
Fig.5. The positions where temperature were measured with the thermo couples.
Fig.6 ߦ㧘ඨಝ࿕ࠬࠍ↢ᚑߔࠆࠬࠢࡘᷙ
✵ㇱߩ᷷ᐲᓮᕈࠍᤨ㑆⚻ㆊߢ␜ߔ㧚ࠬࠢࡘゲᣇ ะ 3 ߆ᚲߩ᷹ቯ⚿ᨐߢࠅ㧘SB-1 ߇ᦨ߽ㇱߦ ㄭ⟎ߢࠆ㧚ోߩ⸳ቯ᷷ᐲߪ903K㨪913Kߢ
ࠅ㧘ߕࠇߩㇱߢ߽ᄌേߪr1͠ౝߢផ⒖ߒ㧘
߶߷⸳ቯ᷷ᐲߢᓮߐࠇߡࠆ㧚ᰴߦTable 2ߦ␜
ߒߚ⸳ቯ᷷ᐲߩᄌᦝߦᓥߞߡSBߩ᷷ᐲ߇ᄌൻߒߚ
⁁ᘒࠍFig.7 ߦ␜ߔ㧚⸳ቯ᷷ᐲߩᄌᦝ㧔㒠ਅ㧕ߦว
ࠊߖߡࠬࠢࡘᷙ✵ㇱߩ᷷ᐲ߽ૐਅߒߡࠆ㧚ฦㇱ
㧔SB ߅ࠃ߮ SN㧦ࡊࡦࠫࡖㇱߣߩធวㇱ㧕ߪ㧘
⚂ 15 ಽ⒟ᐲߢቯߒߚ᷷ᐲߦߥߞߡࠆ㧚ߐࠄߦ
ࡊࡦࠫࡖㇱౝߢታ᷹ߒߚඨಝ࿕᷷ࠬ
ᐲ߽ห᭽ߦૐਅߒߡࠆ߇㧘ቯߒߚ᷷ᐲߦߥࠆߦ ߪ15ಽએߩᤨ㑆߇ᔅⷐߢࠅ㧘SNㇱ᷷ᐲߩᓇ㗀 ࠍᄢ߈ߊฃߌࠆߎߣ߇ಽ߆ߞߚ㧚
SNͲ1SB2Ͳ1 SNͲ2SB2Ͳ2 SB1Ͳ1SB4Ͳ1 SB1Ͳ2SB4Ͳ2
Fig.6. Change of the barrel temperature time over.
913 908 893 898 893 888 883
0 30 60 90 120
Temperature T (K)
Time t (min)
Shot8Ͳ10 Shot
11Ͳ15 Shot
17Ͳ21 Shot
22Ͳ27
SNͲ1SB4Ͳ1 SNͲ2SB4Ͳ2 SB1Ͳ1SB3Ͳ2 SB1Ͳ2SB5Ͳ1 SB2Ͳ1SB5Ͳ2 SB2Ͳ2slurry
Temperature T (K)
Fig.7. Change of the barrel temperature time over.
Table 2. Temperature condition at barrel.㧔Unit㧦K㧕 Shot No. Slurry SN SB1 SB2 SB3 SB4 SB5 SB6 8䌾 895 903 903 903 903 903 903 903
11䌾 903 893 866 864 865 865 873 㸡
17䌾 891 875 㸡 㸡 㸡 㸡 㸡 㸡
22䌾 882 871 862 860 861 861 869 㸡
ᓮᕈ
ᰴߦ㧘᧦ઙߦ㑐ߔࠆᬌ⸽ࠍታᣉߒߚ㧚ߘߩ⚿
ᨐࠍFig.8ߦ␜ߔ㧚ㅦᐲߩᦨ㜞୯ߪ4.5m/sߣ⋡
ᮡ୯ߩ 4m/s એࠍ㆐ᚑߒߚ㧚߹ߚ㧘ߘߩᤨߩടㅦ ᐲ߽57Gߣߥࠅห᭽ߦ⋡ᮡ୯ߩ40Gࠍ߃ߡࠆ㧚 ߐࠄߦ㧘ᦨ㜞ᜬജ߹ߢߩ㆐ᤨ㑆ߪ12msߢ㧘 ߘߩᤨߩᜬജߪ77MPaߣ70MPaࠍ߃ߚ㧚ߎ ߩജߢ 1s એᜬน⢻ߢ㧘⹜ᯏߩ㜞ࠪ࡞
ᕈ߇⸽ߢ߈ߚ㧚
એߩ⚿ᨐ߆ࠄ㧘ࠨࠗࠢ࡞࠲ࠗࡓࠍ㒰ߡ㧘߶߷
⸳⸘ᤨߦ⋡ᮡߣߒߚ᭽୯ߪ㆐ᚑߢ߈ߚ㧚
Injection Stroke Ɛ (㬍0.1mm) Injection Force F (㬍100N)
Time t (ms)
Injection Speed V (mm/s)
䋺Injection Stroke 䋺Injection Force 䋺Injection Speed Injection Speed :4.5 m/s Acceleration 57 G
Hold Time for Max. Pressure䋺1 s Hold Pressure 䋺77MPa Time until Max. Pressure 䋺12ms
Fig.8. Injection wave to evaluate the trial machine.
ඨಝ࿕ࠬ↢ᚑࠪࡒࡘ࡚ࠪࡦ
ᧄ⎇ⓥߢ↪ߒߚ⠴ᾲMgว㊄ߩ☼ᐲ᷹ቯ߆ࠄᓧ ࠄࠇߚ☼ᐲ࠺࠲ࠍߞߡ㧘ታ㓙ߩᚑᒻታ㛎ࠍߔࠆ ೨ߦ㧘ඨಝ࿕ࠬ↢ᚑㇱߢࠆࠬࠢࡘᷙ✵ㇱ ߩ᷷ᐲ⸳ቯߩᦨㆡൻࠍ⋡⊛ߦᢙ୯ታ㛎ࠍⴕߞߚ㧚Fig.9 ߦ㧘☼ᐲ࠺࠲ࠍၮߦ⸘▚ߒߚ☼ᕈࡕ࠺࡞
ࠍ␜ߔ㧚⠴ᾲMgว㊄ߩ☼ᐲ᷹ቯߦߪ㧘㜞᷷ߢㅪ⛯
⊛ߥ᷷ᐲᄌൻߦኻᔕߒߚ☼ᐲ᷹ቯ߇น⢻ߢ㧘㊄ዻߩ ᵹേᕈ߿ㅢᶧᕈ߇⹏ଔߢ߈ࠆᝄേ ᑼ☼ᐲ⸘ࠍ
↪ߒߚ7-8) 㧚Fig.10㧘11 ߦߪ㧘㜞☼ᕈᵹേ㒢ⷐ⚛
ᴺߦࠃࠅ⸃ᨆߒߚࠬࠢࡘᷙ✵ㇱߢߩṁⲢࠬ
ߩᵹㅦಽᏓߣ᷷ᐲಽᏓ⚿ᨐࠍ␜ߔ㧚ᵹㅦಽᏓࠃࠅ
ࠬࠢࡘᷙ✵ㇱญߢᣧㅦᐲ㗔ၞ߇ࠅ㧘ߎߩㇱ ಽߢࠬߩ⊒ᾲߦࠃࠆ᷷ᐲ߇੍ᗐߢ߈ࠆ㧚
߹ߚ㧘Fig.11ߩ᷷ᐲಽᏓ⚿ᨐ߆ࠄ㧘ࠬߩญ
ߣญ᷷ᐲࠍᶧ⋧✢એߣߒ㧘ᷙ✵ㇱࡃ࡞ო㕙᷷
ᐲ㧔Ⴚ⇇᧦ઙ㧕ࠍ873Kߣᶧ⋧✢એਅߦ⸳ቯߒߚ႐ ว㧘5min એౝߢࠬࠢࡘవ┵ㇱઃㄭ߇ 873㨪875K 㧔ᗐቯ࿕⋧₸10%㧕ߦૐਅߒ㧘ߘߩవߩ᧚ᢱṛ⇐ㇱ ߪ896K⒟ᐲߦߥࠆߎߣ߇੍᷹ߢ߈ࠆ㧚ࠬࠢࡘᷙ
✵ㇱߢߪ5ಽ⒟ᐲߩṛ⇐ᤨ㑆ࠍᗐቯߒߚᒻ⁁⸳⸘ࠍ ߒߡ߅ࠅ㧘903K ߢṁ⸃ߒߚṁḡߪ㧘ࠬࠢࡘᷙ✵
ㇱߢߩᷙ✵ਛߦᶧ⋧✢᷷ᐲએਅ㧔ඨಝ࿕᷷ᐲ㗔ၞ㧕 ߦ಄ළߐࠇ㧘หᤨߦࠬࠢࡘ࿁ォߦࠃࠆᠣᜈ↪ߢ
⊒↢ߔࠆߖࠎᢿᔕജߦࠃࠅ࿕⋧☸ߣߥࠅߘࠇ߇ಽ ᢔߒߚඨಝ࿕ࠬߦ↢ᚑߐࠇࠆߎߣ߇ಽ߆ࠆ㧚
Fig.9. The viscous model used for the numerical analysis.
Fig.10. The velocity distribution in the screw mixing section by a numerical analysis.
ߎߩඨಝ࿕ࠬߪ㧘ᚲቯߩ㊂ߛߌ⸘㊂ߐ ࠇࡊࡦࠫࡖㇱ߳⒖ㅍߐࠇࠆ߇㧘ࠬࠢࡘవ┵
ㇱߩṛ⇐ㇱߩ᷷ᐲ߇ᶧ⋧✢ࠍ߃ߡࠆߚߦ㧘ṛ
⇐ᤨ㑆߇㐳ߊߥࠆߣౣṁ⸃ߐࠇࠆน⢻ᕈ߇ࠆ㧚1 ಽ⒟ᐲߩṛ⇐ߢࠇ߫ᾲવዉߦࠃࠅౣṁ⸃᷷ᐲߦ
Enlarged view
Enlarged view
0 50(mm/s)
0 250
^ 100 2`
4
0 3
8
1 2
29
3 4
1
exp 273.15 3.099 10 , 0.7552 3.641 10 , 58330
C C
C C T
C C
C C
K K K J K
½
® ¾
¯ ¿
u u
20
15
10
5
0
773 823 873 923 973 Temperature T
䋨͠䋩
ViscosityȘ
䋨
Pa䊶
s䋩
^
1 00 2`
4
0 3
8 1
2
29 3
4
1
exp 273.15 3.099 10
0.7552 3.641 10 58330
C C
C C T C
C C C K K
K J K
½
® ¾
¯ ¿
u
u
䋨K䋩
ߪߥࠄߥߎߣࠍᾲવዉ⸃ᨆߦࠃࠅ⏕ߒߡࠆ㧚 ߒ߆ߒ㧘ࠬࠢࡘᷙ✵ㇱ߆ࠄࡊࡦࠫࡖㇱ߳ߩ
ࠬࡓ࠭ߥ⒖ㅍߣࠬࠢࡘవ┵ㇱએ㒠ߩᠣᜈ↪
ࠍฃߌߥߊߥࠆㇱಽߢߩ᷷ᐲ⸳ቯߪ㊀ⷐߢࠆ㧚
1min.
2min.
3min.
4min.
5min.
903 903
873 903
903 (a) The boundary condition of temperature.(Unit䋺K)
(b) Change of the temperature distribution in every minute 873K 903K
Fig.11. Change of the temperature distribution over time by a numerical analysis.
ඨಝ࿕᷷ࠬᐲ㧔࿕⋧₸㧕ߩᓮᕈ
ᧄ⹜ᚑᒻⵝ⟎ߪ㧘࿕⋧₸30wt%߹ߢߩඨಝ࿕ࠬ↢ᚑࠍน⢻ߣߔࠆߎߣࠍ⋡ᮡ୯ߣߒߡࠆ㧚 ߘߎߢ㧘⸥ߒߚᢙ୯⸃ᨆ⚿ᨐࠍㆡ↪ߒ㧘ฦㇱࠍㆡ
ಾߥ᷷ᐲߦ⸳ቯߔࠆߎߣߢ㧘᷷ࠬᐲ㧔࿕⋧₸
ߣ৻⟵⊛ߦኻᔕ㧕ࠍ⥄ߦ⸳ቯߢ߈ࠆ߆ߦߟߡᬌ
⸽ߒߚ㧚Fig.12ߦࠬ↢ᚑㇱࠍઍߒߡSB1ߩ
᷷ᐲࠍ❑ゲߦ㧘ᮮゲߦߪࡊࡦࠫࡖㇱࠍઍߒ ߡPB7ߣߒߡᚑᒻߐࠇߚMgว㊄ඨಝ࿕ࠬ
߇ߤߩࠃ߁ߦᄌൻߒߡࠆ߆ࠍ␜ߒߚ㧚PB7ߩㇱ
ߢߩ᷷ᐲ߇903Kߩ႐วߪ㧘ᷙ✵ࠬ↢ᚑㇱ ߩPB1ࠍߊࠄᄌൻߐߖߡ߽࿕⋧ߪᶖᄬߒߡߚ㧚
৻ᣇ㧘PB7ࠍ893Kએਅߦߔࠆߣ㧘ࠬ↢ᚑㇱ ߢߩ᷷ᐲࠍᤋߐߖߚ᷷ᐲߦߥࠆߎߣ߇ಽ߆ߞߚ㧚 හߜ㧘Mg ว㊄ඨಝ࿕ࠬߩ᷷ᐲᓮߦߪ㧘
ࡊࡦࠫࡖㇱߩ᷷ᐲߪṁⲢ᷷ᐲ㧔ߎߩMgว㊄ߩ
႐วߪ㧘882K㧕એਅߣᤨߩࠬ⾂⬿ㇱಽߢ
ࠆࡊࡦࠫࡖㇱߩ᷷ᐲߩᓇ㗀ࠍฃߌߥߎ ߣ߇ಽ߆ߞߚ㧚ߘߩ⚿ᨐ㧘Mg ว㊄ඨಝ࿕ࠬ
ߩ࿕⋧₸ߩ⸳ቯߦߪ㧘ᷙ✵ࠬ↢ᚑㇱߢࠆ
SB1㨪SB5ߩㇱߢߩ᷷ᐲ⸳ቯߢน⢻ߢࠆ㧚
Fig.12. The mapping of the rate of solid phase by semi-solid temperature conditions.
ඨಝ࿕ࠬߦࠃࠆᚑᒻᕈ
ࠬࠢࡘᷙ✵ㇱߩᾲવዉ߅ࠃ߮ᵹേ⸃ᨆ⚿ᨐߣ ඨಝ࿕ࡑ࠶ࡊࠍၮߦ㧘ቢోṁⲢ⁁ᘒߣඨಝ࿕⁁ᘒ 㧔࿕⋧₸30%ࠍᗐቯ㧕ߩ᧦ઙࠍᗐቯߒ㧘ඨಝ࿕
ᚑᒻᯏోߩᦨㆡߥ᷷ᐲ⸳ቯࠍⴕ㧘ቢోṁⲢߣඨ ಝ࿕ࠬ⁁ᘒߩᵹേ⁁ᘒߩ㆑ࠍ⏕ߔࠆ
ᚑᒻታ㛎ࠍታᣉߒߚ㧚᧼⁁㧔ෘߺ5mm㧕㊄ဳߦ㧘
ࠬ⁁ᘒߩ⇣ߥࠆ᧚ᢱࠍหߓ᧦ઙߢᧂల ḩᚑᒻ㧔࡚ࠪ࠻࡚ࠪ࠶࠻㧕ߒߚ㧚ᵹേᕈߩ㆑
ࠍFig.13ߦ␜ߔ㧚ቢోṁḡ߇㘧߮ᢔࠅߥ߇ࠄྃ㔵
⁁ߢలႯߐࠇߡࠆߩߦኻߒߡ㧘ඨಝ࿕ࠬߪ ႙⁁ߢలႯߐࠇߡࠆ㧚ߎࠇߪ㧘ඨಝ࿕⁁ᘒߦࠃࠆ
☼ᕈߩჇട߇㧘ᵹേᕈߦᄢ߈ߊᓇ㗀ߒߡࠆߎߣ߇ ኈᤃߦಽ߆ࠆ㧚ߔߥࠊߜ㧘ඨಝ࿕ࠬߩᣇ߇ࠃ ࠅ᮸⢽ߦㄭ☼ᕈᵹേࠍߒ㧘㊄ဳౝߢߩᵹേߩࠟࠬ
Ꮞ߈ㄟߺ╬ߩᡷༀ߇ᦼᓙߢ߈ࠆ⚿ᨐߣߥߞߚ㧚
SemiͲSolid SlurryMetal
MoltenMetal
Fig.13. The difference of flow status between semi-solid and molten metal.
PB7 of Temperature T (K)
SB1 of Temperature T (K)
853 863 873 883 893 903 913
863 873 883 893 903 913
853
883K 885K >893K
>893K
>893K 882K
882K 878K
875K 870K
>893K
㧚ࡊࡠࠬߩᬌ⸽ߣࠢ࠶࠴ࡇࠬ࠻ࡦߩ⹜
ᓥ᧪ߩ࠳ࠗࠞࠬ࠻ᚑᒻߣᲧߴߡ㧘ඨಝ࿕ᚑᒻ ࡊࡠࠬߩὐࠍએਅߦߍࠆ㧚
Ԙಝ࿕❗/ഀࠇߩᛥ߇น⢻
ԙࠟࠬᏎ߈ㄟߺߩᛥ߇น⢻
Ԛ㊄ဳ߳ߩઃ߈ߩᛥ߇น⢻
ԛ㊄ဳߩ㐳ኼൻߥߤ
ඨಝ࿕ᚑᒻⵝ⟎⹜ᓟ㧘ࡊࡠࠬߩఝᕈࠍ ᬌ⸽ߔࠆᦨ⚳⊛ߥ⹜ᚑᒻຠߩ࠲ࠥ࠶࠻ߣߒߡ㧘
Fig.14ߦ␜ߔ⥄േゞ↪ࠢ࠶࠴ࡇࠬ࠻ࡦࠍᚑᒻߒ⹏
ଔߒߚ㧚ࠢ࠶࠴ࡇࠬ࠻ࡦߪ㧘⥄േゞࡄࡢ࠻ࠗ
ࡦㇱຠߩਛߢ߽∋ഭᒝᐲߦኻߔࠆା㗬ᕈࠍᔅⷐߣ ߒ㧘߹ߚシ㊂ൻߩലᨐ߽⋭ࠛࡀߦኻߒߡᄢ߈ߚ㧘 ᓥ᧪᧚ᢱߢࠆAƐว㊄ߦઍᦧ᧪ࠇ߫㕖Ᏹߦലᨐ ߇ᄢ߈ㇱຠߢࠆ㧚౮⌀ߦߪ㧘࿕⋧₸ߩ᷹ቯ⟎
߽หᤨߦ␜ߒߡࠆ㧚
Fig.14. A clutch piston sample. Numbers indicate sites for the measurement of the rate of solid phase.
ᚑᒻຠౝㇱߩ࿕⋧₸᷹ቯ⚿ᨐ
Fig.14ߦ␜ߔࠃ߁ߦ㧘࿕⋧₸ߩᓮᕈߣ࿕⋧☸ߩ
ಽᢔߩဋ৻ൻࠍ⏕ߔࠆߚ㧘ࠢ࠶࠴ࡇࠬ࠻ࡦᚑ ᒻຠᢿ㕙ࠍ⎇⏴ߒ࿕⋧₸ࠍ↹ಣℂⵝ⟎ߢ᷹ቯ⹏
ଔߒߚ㧚࿕⋧₸ߪ5wt%ߣ30wt%ߦᗐቯߒߚ㧚ᚑᒻ
ຠౝㇱߩ࿕⋧₸᷹ቯ⚿ᨐࠍFig.15ߣTable 3ߦ␜ߔ㧚
⊕⦡ㇱಽ߇࿕⋧☸ߢࠆ㧚↹ಣℂ᷹ቯߦࠃࠆ⹏ଔ
⚿ᨐ߆ࠄ㧘᷹ቯ႐ᚲߦࠃࠆ࿕⋧₸ߩ߫ࠄߟ߈ߪࠄ ࠇࠆ߇㧘࿕⋧₸ࠍቯߔࠆ᷷ᐲ㗔ၞߩ⁜ߐࠍ⠨ᘦ ߔࠆߣ㧘ᚑᒻຠోߦᷰࠅᗐቯߒߚ࿕⋧₸ߩᚑᒻຠ
ࠍᓧߡࠆ㧚ߘߩ⚿ᨐ㧘㐿⊒ߒߚඨಝ࿕ᚑᒻᯏ ߦ߅ߌࠆඨಝ࿕ࠬ↢ᚑߦ߅ߌࠆ࿕⋧₸ߩࠦ
ࡦ࠻ࡠ࡞ᕈߦߟߡ߽ലᕈ߇⏕ߢ߈ߚ㧚 Temperature 875K Temperature 865K
200 ȝm
Position㽲Position㽸
Fig.15. The metallographic structure photographs in the positions of both Ԙ and Ԟfor 865K and 875K.
Table 3. The rate of solid phase in each position for 865K and 875K.
Temperature
(K) 㽲䇭(%) 㽵䇭(%) 㽸䇭(%) 㽻䇭(%) Calculated value䇭(%)
865 28.8 24.5 30.6 25.3 㻍30
875 7.9 6.9 10.1 5.1 㻍10
ᦨㆡᚑᒻ᧦ઙߩᬌ⸛ߣຠ⾰⹏ଔ ᦨㆡᚑᒻ᧦ઙߩᬌ⸛
ᰴߦ㧘ᚑᒻຠߩຠ⾰⹏ଔߦߟߡㅀߴࠆ㧚ᧄ⎇ⓥ
ߢ⹏ଔኻ⽎ߣߒߚᚑᒻຠߩࠢ࠶࠴ࡇࠬ࠻ࡦߪ㧘➅ ࠅߒ⩄㊀㧔ᴤജ㧕߇↪ߒ㧘⠴ਭᕈߣା㗬ᕈ߇ ⷐ᳞ߐࠇࠆ㊀ⷐ⥄േゞㇱຠߢࠆ㧚ߘߩߚ㧘ᰳ㒱 㧔ࡏࠗ࠼㧘ⓨ㓗㧕߇ౝᄖㇱߦሽߔࠆߣߘߎ߇ὐ ߣߥࠅ⎕უ߇ㅴⴕߔࠆߚ㧘ᰳ㒱ߩሽ߇⸵ߐࠇߥ
㧚ߘߎߢ㧘వߕᚑᒻຠߩ㕙ߦ߅ߌࠆᰳ㒱ࠍ⺞ߴ ࠆߚⰯశត்ᴺߦࠃࠆ⋡ⷞ⹏ଔࠍⴕߞߚ㧚Fig.16 ߦ㧘ᚑᒻຠ㕙ߩᰳ㒱ߩήࠍ␜ߔ㧚ᰳ㒱ࠅߩᚑ ᒻຠ(a) ߆ࠄ㧘⿒⦡ߢ࿐ㇱಽ߇ᚑᒻᤨߦߢ߈ߚᰳ
㒱ߢࠆ㧚ᯏ᪾ടᎿᓟߦ߽Ḵㇱಽߩౝㇱߦᰳ㒱߇
ߒߡࠆ㧚৻ᣇ㧘㕙ߦᰳ㒱ߩήᚑᒻຠ(b) ߪ㧘 ᯏ᪾ടᎿᓟߦ߽ౝㇱᰳ㒱ߪ߶ߣࠎߤࠇߥߎߣ
߽หᤨߦ⏕ߐࠇߚߚ㧘ᚑᒻຠߩ⹏ଔᣇᴺߣߒߡ㧘 12 ࠆⓣㇱߩ㕙ᰳ㒱ߩሽᢙࠍⰯశត்ᴺߦ ࠃࠅ⋡ⷞⷰኤߒ㧘ᰳ㒱ᐲวࠍ⹏ଔߔࠆߎߣ߇ല ߣ⠨߃ࠄࠇߚ㧚
ᾃ ᵕ
ᵏ ᵏᵎ
(a) With void (b) Without void Fig.16. Existence of defect on the surface of the cast by
the color checks method.
ㅀߒߚⰯశត்ᴺߦࠃࠆ㕙⋡ⷞᬌᩏߩຠ⾰
⹏ଔᣇᴺࠍߞߡ㧘ᰳ㒱ߩήᚑᒻຠࠍᓧࠆ㧚ߘߩ ߚ㧘ታ㛎⸘↹ᴺߦࠃࠅᚑᒻ᧦ઙࠍᝄࠅಽߌ㧘ᦨㆡ ᚑᒻ᧦ઙࠍᚑᒻታ㛎ࠃࠅቯߔࠆ 7)㧚ౕ⊛ߦߪ㧘
వߕTable 4ߦ␜ߔᓮน⢻ߥᚑᒻ᧦ઙࠍቯߒ㧘
ߘߩฦ᧦ઙࠍL18⋥ߦഀࠅઃߌߚ㧚ߘߒߡ㧘⸳
ቯߒߚฦᚑᒻ᧦ઙߢᚑᒻߒ㧘ᰳ㒱ߩ⁁ᘒ㧔ⓣㇱߩሽ
ᢙ㧕ߦߟߡຠ⾰⹏ଔߒߚ㧚
Table 4. The forming experimental condition by semi-solid injection molding machine.
Control factor Level
Condition setup of semi-solid injection molding mHold time
of injection pressureachine.
A Pressure-up speed (Valve open angle %)
High (20%)
Low (13%)
- B Preset temperature of
screw barrel (K)
913 875 865
C Injection speed (m/s) 1 2 4
D Injection pressure (MPa) 20 40 70 E Hold time of injection
pressure (msec.)
200 600 1000
Condition setup of mold.
F Degree of vacuum (kPa) Atmos phere
50 5
G Temperature (K) 423 473 523
H Chill time (s) 1 3 10
⹏ଔ⚿ᨐࠍFig.17ߦ␜ߔ㧚❑ゲߪS/NᲧߢᚑᒻᕈ ߩᏅ⇣ࠍ␜ߒ㧘ᢙ୯ߩ㜞߶ߤᰳ㒱߇ήߊᚑᒻᕈ߇
⦟⁁ᘒࠍ␜ߒߡࠆ㧚࿑߆ࠄಽ߆ࠆࠃ߁ߦ㧘
ㅦᐲ㧘㧔㍌ㅧ㧕ജߩᓇ㗀߇ᄢ߈ߊ㧘ㅦᐲ ߪㅦ߶ߤ㧘ജߪ㜞߶ߤᚑᒻᕈߪ⦟㧚߹
ߚ㧘ඨಝ࿕ࠬߩ↢ᚑ᷷ᐲߣߒߡߪ 875K㧔ᗐ ቯ࿕⋧₸10㧕߇ᦨ߽ᚑᒻᕈ߇⦟ߣ߁⚿ᨐߦߥ
ߞߚ㧚ߎߩ⸃ᨆ⚿ᨐࠍၮߦ㧘ᦨㆡᚑᒻ᧦ઙࠍቯߒ ᚑᒻߒߚᚑᒻຠ߇వߦFig.16 (b)ߦ␜ߒߚഀࠇߩή
ᚑᒻຠߢࠅ㧘ߎߩ⚿ᨐ㧘ᰳ㒱ߩήᚑᒻຠࠍ⠴
ਭᕈ⹜㛎ߦଏߔࠆߎߣ߇᧪ߚ㧚
S/ N Rat io
6 5 4 3 2
High Low 913 875 865 1 2 4 20 40 70
B C D
A
G H
S/ N R a ti o
6 5 4 3 2
200 600 1000 AT 50 5 423 473 523 1 3 10
E F
Fig.17. Influence on the optimum molding conditions by evaluation of the number of cast defects.
ࠢ࠶࠴ࡇࠬ࠻ࡦߩ⠴ਭᕈ⹏ଔ
ㅢᏱߩ⠴ਭᕈ⹏ଔߦߪ㧘ᚑᒻຠ߆ࠄ⹜㛎 ࠍಾࠅ
ߒ㧘ᯏ᪾⊛․ᕈࠍ⺞ߴࠆߚߦᒁᒛࠅ߿ᦛߍߩ∋
ഭ⹜㛎ࠍⴕ߁㧚ߒ߆ߒ㧘ㅀߒߚࠃ߁ߦࠢ࠶࠴ࡇ
ࠬ࠻ࡦߩࠃ߁ߥା㗬ᕈࠍᔅⷐߣߔࠆ㊀ⷐㇱຠ
ߪ㧘ታㇱຠߣห᭽ߥ➅ࠅߒ⩄㊀ࠍᮨᡆ⊛ߦ↪ߐ ߖࠆߎߣ߇ߢ߈ࠆ࠹ࠬ࠻ࠬ࠲ࡦ࠼ࠍ⹜ߒ㧘ߘߩ
ߢ⠴ਭᕈࠍ⹏ଔߔࠆߎߣ߇ᄙ㧚࿁ߩ⠴ਭᕈ⹏ଔ ߢ߽㧘Fig.18ߦ␜ߔ࠹ࠬ࠻ࠬ࠲ࡦ࠼ࠍߒ㧘ଏ⹜
ᚑᒻຠࠍขઃߌ㧘⠴ਭᕈ࠹ࠬ࠻ࠍታᣉߒߚ㧚⹏ଔᚑ ᒻຠߦߪ࿁⹜ߒߚ⠴ᾲMgว㊄ߣᓥ᧪᧚ᢱߢ
ࠆAƐว㊄ߢ࠳ࠗࠞࠬ࠻ᚑᒻߐࠇߚ2⒳㘃ߩᚑᒻຠ
ࠍ↪ߒߚ㧚Table 5ߦ㧘⎕៊ߔࠆ߹ߢߩ➅ࠅߒ࿁
ᢙߣ⎕៊ㇱߩ㆑ࠍ␜ߔ㧚↪ߐࠇߡࠆ AƐว㊄ߪ㧘AƐ-1㧔395,400࿁ߢ⎕៊㧕એᄖߪ⎕៊ߖ
ߕ847,800࿁ߢ➅ߒታ㛎ࠍᛂߜಾߞߚ㧚ߘࠇߦᲧ
ߴߡ㧘⠴ᾲ Mgว㊄ߪ㧘334,200 ࿁߇ᦨ㜞ߢ㧘ᦨ⍴
ߢߪ104,400࿁ߢౝḴㇱ߆ࠄ⎕៊ߒߚ㧚⚿ᨐߣߒ
ߡ㧘⠴ᾲMgว㊄ߪAƐว㊄ਗߩ⠴ਭᕈࠍᓧࠆߎߣ
ߪߢ߈ߥ߆ߞߚ㧚৻ᣇ㧘⎕៊ߩᩮᧄ⊛ߥේ࿃ࠍᬌ⸛
߆ࠄ㧘ᕈߩ⇣ߥࠆ
2⒳㘃ߩ᧚ᢱࠍหߓᒻ⁁ߢ߆ߟ หߓജࠍ↪ߐߖߚߚ⚿ᨐ㧘ᕈߩ㆑㧔
AƐว㊄ߪ
Mgว㊄ߩ
1.4㧕ߦࠃࠅ㧘⠴ᾲ
Mgว㊄ߩ
➅ࠅߒᄌᒻᤨߩ߭ߕߺ㊂߇
1.4ߣߥࠅ㧘ࠬࡊ
ࡦࠣထ㕙ㄭறઃㄭߩᦨ⭯ㇱ߇⠴߃߈ࠇߕ⎕៊ߒߚ ߩߢߪߥ߆ߣ⠨߃ࠄࠇߚ㧚
Fig.19ߦ⎕៊ㇱߩ౮⌀
ࠍ␜ߔ㧚
Fig.18. Test stand for the durability evaluation of a clutch piston.
Table 5. The evaluation result of the durability test.
Materi als
Sample No.
The number of times of
breakage
The parts of breakage
Mg
Mg-1 334,200 Near a spring seat side Mg-2 282,000 Near a spring seat side Mg-3 161,000 The corner part of a spring seat
side
Mg-4 232,200 The corner part of a spring seat side
Mg-5 104,400 The groove processing portion over all the circumferences
Al
AƐ-1 395,400 Near a spring seat side AƐ-2 847,800 The test close without damaging AƐ-3 847,800 The test close without damaging
Fig.19. The photograph of breakage near spring seat side.
⚿⸒
(1)
ඨಝ࿕
Mgᚑᒻ↪ߣߒߡဳ✦ജ
200tonߩ⹜
ᯏࠍ⸳⸘ߒߚ㧚
(2) Ca
ࠍඨಝ࿕㗔ၞߩ⁜
AMC403⠴ᾲ
Mgว㊄ߢߞߚ߇㧘ᢙ୯ࠪࡒࡘ࡚ࠪࡦࠍߞ ߚࡃ࡞᷷ᐲߩᦨㆡߥ⸳ቯߦࠃࠅ㧘ᚲቯߩ࿕⋧
₸ࠍ߽ߟᚑᒻຠࠍ↢ᚑߔࠆߎߣ߇ߢ߈ߚ㧚
(3)ඨಝ࿕ࠬߩᵹേ⁁ᘒߪ㧘ṁḡࠬߣ
⇣ߥࠅ㧘႙⁁ߢᵹേߒߡࠆߎߣ߇⏕ߢ߈ߚ㧚
(4)ታ㛎⸘↹ᴺߦࠃࠆᚑᒻ᧦ઙߩᦨㆡൻߦࠃࠅ㧘߶
߷ᰳ㒱ߩήࠨࡦࡊ࡞ࠍᚑᒻߔࠆߎߣ߇ߢ߈ ߚ㧚
(5)
ታേߣห᭽ߥⒿ⁁ᘒߩਅ㧘➅ߒ⠴ਭ࠹ࠬ
࠻ࠍታᣉߒߚ߇㧘ᓥ᧪᧚ᢱຠߢࠆ
AƐว㊄ਗ ߩ⠴ਭᕈࠍᓧࠆߎߣߪ᧪ߥ߆ߞߚ㧚
(6)
ᓟߩ
Mgว㊄᧚ᢱ߳ߩઍᦧߦ㑐ߒߡ㧘ㇱຠߩ
⸳⸘Ბ㓏ߢߩ
Mgว㊄ߩᕈߩ⠨ᘦ߇㊀ⷐߢ
ࠆߎߣ߇␜ໂߐࠇߚ㧚
ෳ⠨ᢥ₂
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#RR㧚
ጟ㊁ ᔋ㧘̌ࡒ࠰࠶࠼㊄ዻߩㅧᴺ̍㧘႟ᕈߣട
Ꮏ 㧘㧘RR㧚
09CPI--9CPǏ#5VWF[QH4JGQOQNFGF2CTVU QH0Q&KG%CUVKPI#NNQ[CV5GOK5QNKF5VCVGU̍
2TQEGGFKPI QH VJ +PVGTPCVKQPCN %QPHGTGPEG QH 5GOK5QNKF2TQEGUUKPIQH#NNQ[UCPF%QORQUKVGU RR㧚
↰ਛ㆐㧘↰⼾㧘◉ፒ⾫ੑ㧘ศ↰ ⺈㧘⮮ᢅ↵㧦 ห ᔒ ␠ ᄢ ቇ ℂ Ꮏ ቇ ⎇ ⓥ ᚲ ႎ ๔ 㧘 㧘 RR 㧚
ᐔᚑ ᐕᐲၞᣂ↢ࠦࡦ࠰ࠪࠕࡓᚑᨐႎ๔ᦠ㧔㕖
㐿㧕㧚
ဈᧄᄦጊᧄ⎇৻㧘̌/I#N%C ♽ว㊄ඨṁⲢᚑ ᒻ ᧚ ߩ ᯏ ᪾ ⊛ ᕈ ⾰ ߣ ⚵ ❱ ̍㧘 シ ㊄ ዻ 㧘 RR㧚
http://www.kobelcokaken.co.jp/zigyou/kadaikaiketsu/it/20 03/2003_all.pdf
╣ේ⨃᮸ઁ㧘̌ᝄേ ☼ᐲ⸘ࠍ↪ߚṁⲢࠬࠣߩㄦ ㅦ᷹ቯᛛⴚߩ㐿⊒̍㧘4& ᚭ㍑ᚲᛛႎ㧘㧘
RR㧔㧕㧚
(Cross section) 2ͲPTͲ1/8
Spring
ʔ107
