Lubricating Oil Composition for Sliding Guide Surfaces
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Solution Overview
Problem
Conventional lubricating oil compositions for machine tools fail to achieve satisfactory frictional and extreme pressure properties required for high precision machining, particularly on sliding guide surfaces.
Innovation Solution
A lubricating oil composition containing a Group III base oil combined with a secondary phosphite and a fatty acid, where the secondary phosphite is present at 0.05-3 mass% and the fatty acid at 0.01-2 mass%, enhancing frictional and load-bearing properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional lubricating oil compositions are used, then basic lubrication is provided, but frictional properties and extreme pressure properties are insufficient for high precision machining
Solution Approach 1:
The patent changes the chemical composition parameters by introducing specific additives (secondary phosphite and fatty acid) with defined concentration ranges. The secondary phosphite is contained at 0.05-3 mass% and fatty acid at 0.01-2 mass%, which optimizes the frictional and extreme pressure properties to achieve the required positioning accuracy for high precision machining
Solution Approach 2:
The patent creates a composite lubricating oil composition by combining Group III base oil with secondary phosphite and fatty acid additives. This composite formulation synergistically improves both frictional properties and extreme pressure properties, resolving the contradiction between basic lubrication and enhanced performance requirements
2Ease of operation
If friction-reducing agents are blended to reduce friction, then sliding properties improve, but load bearing properties may be compromised
Solution Approach 1:
The patent optimizes the concentration parameters of friction-reducing agents by specifying precise ranges: secondary phosphite at 0.05-3 mass% and fatty acid at 0.01-2 mass%. This parameter optimization ensures low friction for smooth sliding while maintaining adequate load bearing capacity through the synergistic effect of the additive combination
3Strength
If high concentrations of additives are used to improve extreme pressure properties, then load bearing capacity increases, but frictional properties may deteriorate
Solution Approach 1:
The patent establishes optimized concentration ranges for secondary phosphite (0.05-3 mass%) and fatty acid (0.01-2 mass%) that balance extreme pressure protection with friction reduction. This parameter optimization prevents the deterioration of frictional properties while achieving sufficient load bearing capacity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The composition exhibits excellent frictional and load-bearing properties, effectively lubricating sliding guide surfaces with improved precision and durability, as demonstrated by low coefficients of friction and high load-bearing capacities in tests.
Implementation Method 1
a secondary phosphite represented by formula (1) and a fatty acid represented by formula (2) wherein the secondary phosphite is contained at a quantity of between 0.05 mass% and 3 mass% relative to the overall quantity of the composition, and the fatty acid is contained at a quantity of between 0.01 mass% and 2 mass% relative to the overall quantity of the composition
Implementation Method 2
The lubricating oil composition of the present invention can exhibit excellent frictional properties and load bearing properties on a sliding guide surface
Data Source
AI summary
A lubricating oil composition for a sliding guide surface, which exhibits excellent low friction properties and extreme pressure properties so as to enable high precision machining in a machine tool, is disclosed.