Oil composition for minimal quantity lubrication aluminum processing

Abstract

The present invention provides an oil for minimal quantity lubrication aluminum processing. In aluminum processing such as cutting, grinding, and form-rolling, the oil composition can improve the processing efficiency, tool life, and handleability in higher levels in a well-balanced manner and further is highly biodegradable and thus environment friendly. The oil composition comprises an alcohol compound having 1 to 8 hydroxyl groups and 2 to 27 carbon atoms, in an amount of 16 to 100 percent by mass on the basis of the total mass of the composition.

Description

[0001]The present invention relates to oil compositions for minimal quantity lubrication aluminum processing.[0002]Examples of aluminum processing include cutting, grinding, form-rolling, forging, pressing, drawing, and rolling. These aluminum processing operations are usually carried out using lubricating oils.[0003]For example, in cutting and grinding operations, cutting and grinding oils have been used in order to extend the working life of tools such as drills, end mills, tool bits, grinding stones and the like, improve the roughness of the finished surface of a workpiece, and improve the processing efficiency thereby, resulting in an improvement in the productivity of machining.[0004]Cutting or grinding oils are roughly classified into two main types of oils, i.e., water-soluble oils which are put in use after diluting the surface-active agent and lubricant component contained therein with water, and water-insoluble oils which contain a mineral oil as a main component and are u...

AI Technical Summary

Benefits of technology

[0019]In cutting, grinding and form-rolling aluminum processing, the oil composition for minimal quantity lubrication aluminum processing can improve the processing efficiency, tool life and handleability sufficiently in a well-balance manner.

Problems solved by technology

Cutting and grinding oils, which are effective in improving processing efficiency have undesirable aspects, from different viewpoints.

Regardless of whether water-soluble or water-insoluble, the oils tends to gradually deteriorate during the use thereof and finally become incapable of further use.

For instance, a water-soluble oil becomes unable to be used when it undergoes the separation of the components or deteriorates the environmental sanitation, caused by deteriorated stability due to the growth of microorganisms.

A water-insoluble oil becomes unusable when the acidic components generated with the progress of oxidation make a workpiece corrode, or the viscosity is significantly changed.

Furthermore, the oil is spent by adhering to metal chips or machining swarf and becomes wastes.

For instance, cutting or grinding oils that are developed for the primary purpose of improving processing efficiency, contain a large amount of chlorine-containing components which may generate harmful dioxin during thermal disposal.

However, even though the oils contain no chlorine-containing component, they would adversely affect the environment if their waste disposal volume is large.

The water-soluble oils may pollute the surrounding water area, and are, therefore, necessarily subjected to highly-developed treatments that require large costs.

However, in this case, the other functions of cutting and grinding oils, i.e., lubricity can not be obtained.

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