JP5604141B2 - 油剤組成物及び極微量油剤供給式切削・研削加工方法 - Google Patents
油剤組成物及び極微量油剤供給式切削・研削加工方法 Download PDFInfo
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Description
[式中、R 1 は、炭素数7〜23を有する炭化水素基を表し、直鎖でも分岐鎖でもよく、飽和でも不飽和でも良い。R 2 は炭素数2〜4のアルキレン基を表し、nはR 2 Oで表されるオキシアルキレン基の繰り返し数を表し、1〜20の整数である。]
親水親油指数=(親水基部分の分子量÷界面活性剤全体の分子量)×100÷5
これらの中でもポリオールとしては、より加水分解安定性に優れることから、ネオペンチルグリコール、トリメチロールエタン、トリメチロールプロパン、トリメチロールブタン、ジ−(トリメチロールプロパン)、トリ−(トリメチロールプロパン)、ペンタエリスリトール、ジ−(ペンタエリスリトール)などのヒンダードアルコールが好ましい。
また、直鎖状脂肪酸、分枝状脂肪酸の何れであっても良く、潤滑性の点からは直鎖状脂肪酸が好ましく、加水分解安定性の点からは分枝状脂肪酸が好ましい。更に、飽和脂肪酸、不飽和脂肪酸の何れであっても良い。
式中、R1は、炭素数7〜23、好ましくは9〜21、より好ましくは11〜19を有する炭化水素基を表し、直鎖でも分岐鎖でもよく、飽和でも不飽和でも良い。また、脂肪族ヒドロキシ酸でも芳香族ヒドロキシ酸でもよいが、不飽和で分岐鎖を有さない脂肪族モノヒドロキシ酸が好ましい。R2は炭素数2〜4のアルキレン基を表し、nはR2Oで表されるオキシアルキレン基の繰り返し数を表し、好ましくは1〜20、より好ましくは2〜15、さらに好ましくは2〜12の整数である。また、(R2O)nが共重合鎖である場合、ランダム共重合鎖でもブロック共重合鎖でもよいが、ランダム重合鎖であることが好ましい。
以下に示す潤滑油基油及び添加剤を用いて、表1〜3に示す組成を有する油剤組成物を調製した。
(A)基油
A1:トリメチロールプロパンとオクチルアルコール,デシルアルコールのフルエステル
A2:ネオペンチルグリコールとオクチルアルコールのフルエステル
A3:ペンタエリスリトールとデシルアルコールのフルエステル
A4:ハイオレイック菜種油
A5:ポリ−αオレフィン(40℃における動粘度を20mm2/sに調整したもの)
(B)ヒドロキシ酸のアルキレンオキサイド付加物
B1:ひまし油脂肪酸(リシノール酸含有量90.5%、リノール酸含有量3.75%、オレイン酸含有量3.0%、パルミチン酸含有量0.75%、ステアリン酸含有量0.75%、ジヒドロキシ酸含有量 0.75%、リノレン酸含有量0.5%)とポリエチレングリコール(10モル)のモノエステル(親水新油指数13.6)
B2:リシノール酸とポリエチレングリコール(2モル)のモノエステル(親水新油指数7.75)
B3:リシノール酸とポリエチレングリコール(1モル)のモノエステル(親水新油指数6.18)
B4:リシノール酸とポリエチレングリコール(20モル)のモノエステル(親水新油指数16.0)
B5:オレイン酸とポリエチレングリコール(12モル)のモノエステル (親水新油指数14.1)
(C)アルコール
C1:オレイルアルコール
C2:ラウリルアルコール
C3:ヘキサコサノール
その他の添加剤
D1:オレイン酸
D2:2,6−ジ−tert−ブチル−p−クレゾール
D3:硫化エステル
JIS K 2283に準拠して、油剤組成物の40℃における動粘度を測定した。得られた結果を表1〜3に示す。
アジピン酸ジイソデシルを比較標準油として、加工性能を評価した。具体的には、試料油(各油剤組成物)と、アジピン酸ジイソデシルとを交互に用いて、以下に示す条件でタッピング試験を行った。
油剤の加工部位への供給の際には、直接加工部位に8.5mL/minの条件で吹き付けた。
被削材1:JIS H 5202規定のアルミニウム合金(AC8A)
被削材2:JIS G 4305規定のステンレス鋼板(SUS304)
工具径:8mm
タップピッチ:1.25mm
タップすくい角:1.5度
タップ食いつき角:10度
タップ下穴径:7.4mm
回転数:360rpm
標準油:DIDA(アジピン酸ジイソデシル)
表1〜3中、「油剤供給方法」の欄のA〜Dは、油剤組成物の加工部位への供給を以下のA〜Dの方法で行ったことを意味する。
A:油剤をそのままミスト化して供給
B:水道水にて20倍に希釈したものを供給
C:ミスト化した油剤を同じくミスト化した水道水と1(油剤):10(水)の割合で混合し加工部位に供給。
D:水道水にて120倍に希釈したものを供給
上記試験におけるタッピングエネルギーを測定し、下記式を用いてタッピングエネルギー効率(TEE,%)を算出した。
タッピングエネルギー効率(%)=(比較標準油を用いた場合のタッピングエネルギー)/(金属加工油組成物を用いた場合のタッピングエネルギー)
得られた結果を表1〜3に示す。タッピングエネルギー効率の値が高い程、潤滑性が高いことを意味する。
油剤組成物の安定性は、油剤を水道水にて10倍に希釈し、室温にて静置し油剤の分離挙動を調べた。24時間後に油剤の分離がないものを○、わずかでも分離油が浮上したものについては×と評価した。得られた結果を表1〜3に示す。
Claims (7)
- 前記潤滑油基油が合成エステル及び/又は植物油であり、前記潤滑油基油の含有量が組成物全量基準で5質量%以上95質量%以下であることを特徴とする、請求項1に記載の油剤組成物。
- 炭素数8〜24の1価アルコールをさらに含有することを特徴とする、請求項1又は2に記載の油剤組成物。
- 請求項1〜3のいずれか一項に油剤組成物を、圧縮流体と共に被加工物の加工部位に向けてミスト状で供給する工程を備えることを特徴とする、極微量油剤供給式切削・研削加工方法。
- 前記工程において、該油剤組成物の0.01〜100質量倍の水を被加工物の加工部位に更に供給することを特徴とする、請求項4に記載の極微量油剤供給式切削・研削加工方法。
- 前記被加工物が非鉄金属であることを特徴とする、請求項4又は5に記載の極微量油剤供給式切削・研削加工方法。
- 前記被加工物がチタン、ステンレス又はインコネルであることを特徴とする、請求項4又は5に記載の極微量油剤供給式切削・研削加工方法。
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US13/583,403 US9050696B2 (en) | 2010-03-11 | 2010-12-10 | Oil composition, and trace amount oil supply type cutting/grinding processing method |
CN201080065011.8A CN102782104B (zh) | 2010-03-11 | 2010-12-10 | 油剂组合物及极微量油剂供给式切削/磨削加工方法 |
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