Solid anti-friction devices – materials therefor – lubricant or se – Lubricants or separants for moving solid surfaces and... – Elemental sulfur – selenium – or tellurium
Patent
1996-11-19
1998-03-10
Medley, Margaret
Solid anti-friction devices, materials therefor, lubricant or se
Lubricants or separants for moving solid surfaces and...
Elemental sulfur, selenium, or tellurium
508153, 508398, 508400, 72 42, C10M12522, C10M12926, C10M12972
Patent
active
057261300
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a cutting or grinding oil composition. More particularly, the present invention relates to a cutting or grinding oil composition which increases working efficiency, such as suppressed wear of working tools and superior precision of a finished surface, and advantageously used as an oil for working by cutting, such as turning, tapping, reaming, broaching, drilling, or automatic lathe working.
BACKGROUND ART
In working of metals, working by cutting in which cutting tools, such as bits, milling cutters, and drills, are used and relatively rough wastes are formed and working by grinding in which grinds rotating in a high speed are used and very fine wastes are formed are frequently conducted.
To cutting oils and grinding oils insoluble in water which are used for working of metals described above, various types of extreme pressure agent and various types of oiliness improver are heretofore added for the purpose of improving workability. However, in the industries using oil compositions for working of metals, oil compositions which enables further improvement of workability are desired for increasing productivity and saving energy.
As the cutting oil and the grinding oil which are intended to satisfy the above requirement, cutting oils and grinding oils containing a base oil and a sulfur-containing extreme pressure agent or a chlorine-containing extreme pressure agent are commercially available. However, these cutting oils and grinding oils do not sufficiently satisfy the requirements with respect to wear of tools and precision of the finished surface which are major factors affecting the efficiency of working. Moreover, when an oil composition contains a sulfur-containing extreme pressure agent or a chlorine-containing extreme pressure agent, environmental problems may arise because chlorine gas or SO.sub.x is formed when the used oil composition is disposed.
DISCLOSURE OF THE INVENTION
Under the above circumstances, the present invention has an object of providing a cutting or grinding oil composition which does not contain a sulfur-containing extreme pressure agent or a chlorine-containing extreme pressure agent and can achieve increase in working efficiency, such as suppressed wear of working tools and superior precision of a finished surface, and another object of providing a cutting or grinding oil composition which can achieve further improvement in workability of conventional oil compositions containing a sulfur-containing extreme pressure agent or a chlorine-containing extreme pressure agent.
The present inventors conducted extensive studies to develop a cutting or grinding oil composition having the above advantageous properties. As the result of such studies, it was discovered that the above objects can be achieved by a composition comprising a base oil and a specific polybasic acid or an ester derivative thereof, and by a composition comprising a compound containing sulfur or a perbasic sulfonate in addition to the above components. The present invention has been completed on the basis of the discovery.
Thus, the present invention provides: a cutting or grinding oil composition comprising (A) a base oil and (B) at least one compound selected from the group consisting of dibasic acids having 2 to 6 carbon atoms, tribasic acids having 3 to 6 carbon atoms, and ester derivatives of these acids; a cutting or grinding oil composition comprising component (A) described above, component (B) described above, and (C) a compound containing sulfur; a cutting or grinding oil composition comprising component (A) described above, component (B) described above, and (D) (D) at least one compound selected from the group consisting of perbasic alkali metal sulfonates and perbasic alkaline earth metal sulfonates; and a cutting or grinding oil composition comprising component (A) described above, component (B) described above, component (C) described above, and component (D) described above.
THE MOST PREFERRED EMBODIMENT TO CARRY OUT THE INVENTION
As the base oil
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patent: 5104558 (1992-04-01), Matsuzaki
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patent: 5360565 (1994-11-01), Junga
JP-346085 Abstract 20 Dec. 1994.
JP-346,086 Absract 20 Dec. 1994.
Idemitsu Kosan Co. Ltd.
Medley Margaret
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