Deep-Drawn Ring Electrode Sleeve for Low-Waste Precision Forming
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Solution Overview
Problem
Current methods for producing ring electrodes for electrophysiological and neuro-medical applications are laborious, expensive, and result in significant precious metal waste, with limited capability for rapid and inexpensive mass production, especially due to the inefficiencies of the turning process and tool wear, which affects accuracy and geometry consistency.
Innovation Solution
A deep-drawing process using a metallic tape to create sleeves with varying diameters and structures, allowing for the production of ring electrodes with minimal waste and improved accuracy, where the tape is reformulated through multiple steps to form continuous tubes with specific radii and features suitable for electrical contacting, reducing the risk of wire damage and enabling easy modification of the process for different applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a turning process is used to produce sleeves from precious metal rods, then the sleeves can be fabricated with precise geometry, but the process results in major loss of precious metal and is expensive and laborious
Solution Approach 1:
The invention changes the fundamental manufacturing parameter from subtractive turning to additive deep-drawing forming. The metallic tape is formed into tubular shapes through deep-drawing processes, completely eliminating material removal and achieving near 100% material utilization while maintaining precise geometric control through controlled forming parameters
Solution Approach 2:
The invention replaces the mechanical cutting system (turning tools, mills) with a forming system (deep-drawing tools, presses). Instead of removing material through cutting forces, the material is shaped through controlled plastic deformation, eliminating tool wear and material waste while maintaining geometric precision
2Manufacturing precision
If a turning process is used to produce sleeves, then the sleeves can be fabricated with controlled geometry, but the process is slow with only one sleeve per two to three minutes
Solution Approach 1:
The invention segments the production process into standardized deep-drawing stages that can be rapidly repeated. The metallic tape is divided into segments that are individually formed and then connected, allowing parallel processing and significantly increased production rate while maintaining geometric control through standardized forming operations
Solution Approach 2:
The invention implements continuous deep-drawing processes where the metallic tape is continuously fed and formed without interruption. The process eliminates the stop-start nature of turning operations, maintaining continuous material flow and tool engagement to achieve high production rates while preserving geometric precision through consistent forming parameters
3Manufacturing precision
If turning tools are used to fabricate sleeves, then the sleeves can be produced with accurate dimensions, but the tools are subject to wear and tear requiring regular replacement
Solution Approach 1:
The invention replaces cutting tools with forming tools that deform material rather than remove it. The deep-drawing tools undergo minimal wear compared to cutting tools, as they work within the material's plastic deformation zone rather than shearing through it, significantly extending tool life while maintaining dimensional accuracy through controlled forming forces
Solution Approach 2:
The invention changes the tool-material interaction parameter from high-stress cutting to controlled plastic deformation. By adjusting forming parameters such as draw ratio, blank holder force, and tool geometry, the process achieves accurate dimensions with minimal tool wear, eliminating the need for frequent tool replacement
4Manufacturing precision
If turning processes are used to produce sleeves, then the sleeves can be fabricated with controlled geometry, but the process is subject to major variation due to tool wear
Solution Approach 1:
The invention replaces the variable cutting process with a more stable forming process. Deep-drawing operations exhibit less sensitivity to tool wear and material variations compared to turning, resulting in more consistent sleeve geometry and reduced process variation while maintaining precise dimensional control through controlled forming parameters
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 deep-drawing process enables rapid, cost-effective production of high-quality ring electrodes with minimal precious metal waste, reducing tool wear-related variations and allowing for precise, reproducible manufacturing of ring electrodes suitable for electrophysiological and neuro-medical applications.
Implementation Method 1
A deep-drawing process using a metallic tape to create sleeves with varying diameters and structures, allowing for the production of ring electrodes with minimal waste and improved accuracy
Data Source
AI summary
One aspect relates to a method of producing a sleeve for a ring electrode for electrophysiological and neuro-medical applications from a biocompatible metallic tape. Repetitive structures are punched into the tape and each includes at least one surface that is connected by at least one fin to at least one external strip. The at least one external strip connects the repetitive structures to each other on the margin. A sleeve mold is formed from a multiple of the repetitive structures through multiple reforming steps by a reforming technique. The sleeve mold is punched off the such that the sleeve is formed with a first tube-shaped region with a larger diameter and a second tube-shaped region with a smaller diameter. The first region with the larger diameter has a larger external diameter and internal diameter than the second region with the smaller diameter, and the two regions are connected.