Aqueous Metalworking Fluid Composition for Stable Cold Rolling
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Solution Overview
Problem
Traditional metalworking fluids for cold rolling operations, such as oil-in-water emulsions and neat oils, face issues like instability, flammability, and inadequate cooling, leading to fluctuations in roll force and wear, and coefficient of friction variations.
Innovation Solution
Aqueous metalworking fluid compositions with high viscosity water-soluble polymers, free from mineral and silicone oils, providing consistent lubrication, thermal management, and anti-wear properties, formulated to maintain stability and performance over time without the need for emulsification or surfactants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil-in-water emulsions are used for cold rolling, then lubrication and cooling are provided, but emulsion stability deteriorates over time causing fluctuations in roll force and wear
Solution Approach 1:
The patent changes the fundamental parameter of the fluid system by transitioning from oil-in-water emulsions to water-soluble polymer solutions. This parameter change eliminates the emulsion stability issue while maintaining lubrication and cooling functions through the high viscosity polymer molecules in aqueous solution.
Solution Approach 2:
The patent extracts and eliminates the problematic emulsion system components (oil phases, surfactants) and replaces them with a simpler water-soluble polymer system. This extraction removes the source of instability while preserving the essential metalworking fluid functions.
2Reliability
If neat oils are used for cold rolling, then lubrication performance is improved, but flammability increases and cooling capability deteriorates
Solution Approach 1:
The patent changes the base fluid parameter from hydrocarbon oil to water, fundamentally altering the flammability characteristic from high to low. The lubrication performance is maintained through the selection of appropriate water-soluble polymers with high viscosity and suitable molecular characteristics.
Solution Approach 2:
The patent creates a composite system combining water (for cooling and fire safety) with high viscosity water-soluble polymers (for lubrication). This composite approach integrates the beneficial properties of both components while eliminating their individual drawbacks.
3Reliability
If neat oils are used for cold rolling, then lubrication is enhanced, but cooling capability deteriorates
Solution Approach 1:
The patent changes the base fluid from oil to water, leveraging water's superior specific heat capacity and thermal conductivity to enhance cooling capability. The lubrication function is compensated by using high viscosity water-soluble polymers that provide adequate film strength despite the lower lubricity of water compared to oil.
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 compositions offer improved lubrication, reduced roll force and wear, and stable performance, comparable to conventional rolling oils, while eliminating the drawbacks of traditional fluids, ensuring consistent performance and cost-efficiency.
Implementation Method 1
one or more water-soluble polymers, each having a kinematic viscosity at 40° C. of at least 5000 cSt
Implementation Method 2
improved thermal management and heat release capabilities
Data Source
AI summary
This disclosure relates generally to metalworking fluids. This disclosure relates more particularly to water-soluble metalworking fluids that include high viscosity polymers, and that can be used in metal cold rolling operations.