SiSiC Component Composition for EDM Deep Micro-Hole Machining
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Solution Overview
Problem
The existing SiSiC components are difficult to machine due to their hardness, making it challenging to create long holes with diameters of 2 mm or smaller and lengths of 100 mm or longer without drill bending or breaking, or achieving deep laser machining while maintaining the inner diameter.
Innovation Solution
A SiSiC component with a specific composition and structure, including a content of 10 to 60 vol% elemental Si, a Young's modulus of 230 GPa or higher, and electrical resistivity of 0.0001 to 100 Ω·cm, featuring long holes with a diameter of 2 mm or smaller and a length of 100 mm or longer, formed using electrical discharge machining to suppress burr formation and adhesion of deposits.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If drilling is used to form long holes in SiSiC component, then hole formation is attempted, but drill bends or breaks due to component hardness
Solution Approach 1:
The patent replaces mechanical drilling with electrical discharge machining (EDM). Instead of using a physical drill that bends or breaks against the hard SiSiC material, the invention uses electrical discharge to erode and form holes. This substitution of mechanical cutting with electrical erosion allows hole formation in extremely hard materials without tool failure.
2Length of moving object
If laser machining is used to create deep holes, then hole depth is increased, but inner diameter cannot be maintained at 2 mm or smaller
Solution Approach 1:
The patent replaces laser machining with electrical discharge machining for hole formation. EDM provides superior precision control for small diameter holes (2 mm or smaller) while achieving the required depth (100 mm or longer). The electrical discharge process allows precise material removal without the thermal effects and diameter control issues that plague laser machining of such small features.
3Strength
If SiSiC component is made harder for better mechanical properties, then strength increases, but machining difficulty increases
Solution Approach 1:
The patent resolves this contradiction by replacing mechanical machining methods with electrical discharge machining. The SiSiC component can be manufactured with high strength properties (hard material) while still being manufacturable through EDM, which does not rely on mechanical cutting. The electrical discharge process can machine hard, brittle materials like SiSiC that would be impossible to machine conventionally.
4Length of moving object
If long holes with small diameter are formed, then hole length increases, but machining becomes impossible with conventional methods
Solution Approach 1:
The patent replaces conventional mechanical drilling and reaming with electrical discharge machining. EDM can form long, narrow holes (100 mm or longer with 2 mm or smaller diameter) by eroding material layer by layer through electrical discharge. This process eliminates the mechanical constraints that prevent formation of such high aspect ratio holes, including drill deflection, chip evacuation, and tool strength limitations.
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
Enables the successful formation of long, precise holes in SiSiC components with improved mechanical and electrical properties, enhancing machining efficiency and reducing surface defects.
Implementation Method 1
forming a long hole in the obtained SiSiC component by electrical discharge machining
Data Source
AI summary
Provided is a conventionally unavailable, novel SiSiC component. The SiSiC component has at least one long hole formed therein, wherein the long hole has a diameter of 2 mm or smaller, wherein the long hole has a length of 100 mm or longer, and wherein the content of elemental Si is 10 to 60 vol %.