Capillary Electrode for Uniform Anodizing of Brake Components
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Solution Overview
Problem
Components in vehicle braking systems made of aluminum often lack sufficient mechanical abrasion resistance, necessitating additional treatments to enhance the surface properties for protection and durability.
Innovation Solution
An electrode design for anodizing that ensures a uniform electrolyte flow and heat removal, facilitating the formation of a consistent anodized layer on aluminum surfaces, particularly in complex geometries like those found in vehicle braking system components, using a capillary electrode structure with controlled flow resistance and laminar electrolyte flow to enhance the anodizing process efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional anodizing methods are used on aluminum components, then a protective oxide layer is formed, but the process is time-consuming and produces non-uniform layers on complex geometries
Solution Approach 1:
The patent applies hydraulic principles by circulating electrolyte through the workpiece using pressure-driven flow. The electrolyte is pumped through inlet openings, forced through the workpiece material, and exits through outlet openings, creating controlled fluid flow that ensures uniform anodizing across complex geometries while accelerating the process.
Solution Approach 2:
The patent divides the electrolyte flow path into multiple segments with separate inlet and outlet openings distributed across the workpiece surface. This segmentation allows different regions to be treated independently with optimized flow rates, ensuring uniform anodizing on complex geometries while maintaining high productivity.
2Productivity
If high current density is applied to speed up anodizing, then productivity increases, but heat generation becomes unmanageable and layer uniformity deteriorates
Solution Approach 1:
The patent uses hydraulic cooling by circulating electrolyte through the workpiece at controlled flow rates. The moving electrolyte acts as a heat transfer medium, carrying away reaction heat from high current density anodizing processes, thus enabling high productivity while maintaining temperature control and layer uniformity.
Solution Approach 2:
The patent implements continuous electrolyte circulation through the workpiece during anodizing. This continuous flow ensures constant cooling and fresh electrolyte supply to the reaction zones, allowing sustained high current density operation without heat accumulation, thereby maintaining both high productivity and temperature control.
3Temperature
If electrolyte flow rate is increased to improve heat removal, then temperature control improves, but electrolyte consumption increases and process efficiency decreases
Solution Approach 1:
The patent segments the electrolyte flow into multiple paths through distributed inlet and outlet openings. This allows the total electrolyte flow rate to be divided among multiple channels, reducing the flow rate per channel and associated electrolyte consumption while maintaining effective heat removal through the combined effect of multiple flow paths.
Solution Approach 2:
The patent applies local electrolyte flow optimization by positioning inlet and outlet openings at specific locations on the workpiece surface. This ensures electrolyte is delivered precisely where heat generation is highest, maximizing heat removal efficiency per unit of electrolyte consumed and reducing overall electrolyte consumption while maintaining temperature control.
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 electrode design enables faster and more efficient anodizing with improved heat management, resulting in a uniform, hard, and scratch-resistant aluminum oxide layer with a hexagonal tubular pore structure, effectively addressing the abrasion resistance issues of aluminum components.
Implementation Method 1
using a capillary electrode structure with controlled flow resistance and laminar electrolyte flow
Implementation Method 2
using a capillary electrode structure with controlled flow resistance and laminar electrolyte flow
Implementation Method 3
Anodizing, an electrolytic oxidation of aluminum, is a known method of surface finishing for producing an oxidic protective layer on aluminum by anodic oxidation
Implementation Method 4
Anodizing, an electrolytic oxidation of aluminum, is a known method of surface finishing
Implementation Method 5
ensures a uniform electrolyte flow and heat removal
Data Source
AI summary
The present disclosure relates to an electrode for eloxing a component, in particular a component of a vehicle brake system, comprising an electrolyte inlet for feeding an electrolyte into the electrode, an inlet channel, which connects the electrolyte inlet to an electrolyte outlet opening formed in the region of an outer surface of the electrode, an electrolyte inlet opening formed in the region of the outer surface of the electrode at a distance from the electrolyte outlet opening, an electrolyte flow path, which runs between the electrolyte outlet opening and the electrolyte inlet opening along the outer surface of the electrode and is designed to bring a surface portion of the component, which surface portion is to be eloxed, into fluid contact with the electrolyte flowing through the electrolyte flow path, an outlet channel, and an electrolyte outlet.