Electrochemical Machining Electrode with Shape Memory Alloy Core
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Solution Overview
Problem
Existing electrochemical machining methods face challenges in forming holes with precise diameters and complex shapes due to complicated electrode structures and limited flexibility in machining shapes, with previous methods either being difficult to adjust or limited to pre-bent electrode shapes.
Innovation Solution
An electrochemical machining apparatus using a core tube made of beta titanium or shape memory alloy, coated with an acid-resistant material, allows for continuous formation of holes with varying curvatures and directions by adjusting the electrode's shape and curvature, enabling flexible deformation and precise hole formation without complex structures or controls.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Shape
If a hollow bent insulation-coated electrode is used to form a bent hole, then the hole shape is limited to the shape of the previously fixed electrode
Solution Approach 1:
The electrode core tube is made from a shape memory alloy that can dynamically change its curvature and bending direction in response to temperature changes. This allows the electrode to adapt its shape during machining operations, enabling formation of holes with varying curvatures and directions from a single electrode structure, thereby resolving the limitation of fixed electrode shapes.
Solution Approach 2:
The invention changes the physical state parameter (temperature) of the shape memory alloy core tube to alter its mechanical properties. By heating or cooling the core tube, its curvature and bending characteristics can be modified, allowing the same electrode to machine different hole shapes and directions without physical replacement or complex mechanical adjustments.
2Adaptability or versatility
If adjusting exposed area and potential of electrode at tip end is used to change hole direction, then the electrode structure becomes complicated
Solution Approach 1:
The invention extracts the shape control function from complex mechanical adjustment mechanisms and embeds it directly into the electrode material itself through shape memory alloy properties. This eliminates the need for separate control systems, mechanical linkages, or multiple electrode components, achieving shape and direction control through material intelligence rather than structural complexity.
3Strength
If a core tube made of beta titanium alloy is used, then the core tube becomes high in yield stress and strength but low in Young's modulus allowing easy deformation
Solution Approach 1:
The invention uses beta titanium alloy, which is a composite material system combining titanium with beta-stabilizing elements. This creates a material with optimized properties: high strength and yield stress for structural integrity, while maintaining low Young's modulus for ease of deformation and shaping during electrode manufacturing and machining operations.
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
This solution enables the simple and rapid formation of holes with varying curvatures and directions, increasing the degree of freedom in machining shapes and allowing for precise, minute-diameter holes without generating internal stress in the workpiece, suitable for applications like gas turbine blades.
Implementation Method 1
the core tube is formed of a shape memory alloy
Implementation Method 2
the core tube is formed of a beta titanium alloy
Implementation Method 3
an electrochemical machining apparatus using a core tube made of beta titanium or shape memory alloy
Data Source
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AI summary
Provided is an electrode capable of increasing a degree of freedom in machining shape with a simple structure, an electrochemical machining apparatus using the electrode, an electrochemical machining method, and a product machined by the method. An electrode 4 has a core tube 41 formed of a material by which a second hole 101b having a direction or a curvature different from that of a first hole 101a having a predetermined curvature can be formed continuously from the first hole 101a and a coating 42 fixed to an outer periphery of the core tube 41.