Electrochemical Device Electrode Arrangement Uniform Plating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing electrochemical processing devices struggle to achieve uniform layer thickness on complex-shaped objects like turbine blades, leading to excessive plating or poor quality due to uneven current density distribution, especially with precious metals like platinum, resulting in high costs and inefficiencies.
Innovation Solution
The device employs a configurable electrode arrangement with shifted positions and separate current sources for each electrode, allowing for optimized current distribution and precise layer thickness control through computer simulations and iterative electrode reallocation, enabling better access to recessed areas with curved or pen-shaped electrodes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If electrodes are positioned in a regular raster pattern, then device complexity is reduced and ease of manufacture is improved, but manufacturing precision of layer thickness deteriorates due to uneven current density distribution
Solution Approach 1:
The patent applies asymmetry by intentionally deviating electrode positions from a regular raster pattern. Electrodes are shifted along the x-axis by a distance dx that is different for different electrodes, creating an asymmetric arrangement that compensates for the uneven current density distribution caused by the object's complex geometry. This asymmetric positioning allows each electrode to target specific areas requiring precise thickness control.
Solution Approach 2:
The patent implements local quality by assigning different shift distances dx to different electrodes based on their specific positions and the local requirements of the object surface. Each electrode's position is optimized independently to achieve the desired current density distribution in its local region, rather than applying a uniform arrangement across the entire electrode array.
2Productivity
If current density is increased to reduce processing time, then productivity is improved, but reliability deteriorates due to electrode passivation and surface deterioration
Solution Approach 1:
The patent applies parameter changes by systematically varying the position parameters (shift distances dx) of multiple electrodes to optimize the current density distribution. This redistribution allows the system to maintain lower current densities that prevent passivation while still achieving the desired processing throughput through coordinated multi-electrode operation.
3Manufacturing precision
If electrode positions are optimized for precise layer thickness control, then manufacturing precision is improved, but device complexity increases due to non-uniform electrode spacing
Solution Approach 1:
The patent resolves this contradiction by introducing a controlled asymmetry in electrode positioning. Rather than completely irregular placement, the electrodes follow a systematic asymmetric pattern where each electrode is shifted by a calculated distance dx from its position in a regular raster. This maintains reasonable structural order while achieving the precision needed for complex geometries.
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 approach ensures a uniform and precise layer thickness across complex surfaces, reducing material waste and processing time while maintaining electrode integrity, thereby optimizing the use of expensive metals.
Implementation Method 1
control means for providing an electric current between the object that is to be processed and the electrodes
Implementation Method 2
at least one electrode is located opposite each portion of a surface of said object that is to be processed
Implementation Method 3
at least one set of electrodes extending parallel to each other, which electrodes are located in said chamber such that during operation at least one electrode is located opposite each portion of a surface of said object that is to be processed
Data Source
Figure 1
Figure 2A
Figure 2B~2C
AI summary
A device suitable for the electrochemical processing of an object is at least provided with a chamber that is to accommodate an electrolyte, means for supporting the object that is to be processed in said chamber, at least one set of electrodes extending parallel to each other, which electrodes are located in said chamber such that during operation at least one electrode is located opposite each portion of a surface of said object that is to be processed, as well as control means for providing an electric current between the object that is to be processed and the electrodes. A number of electrodes is arranged with fixed spacings on nodes of a raster pattern, whilst at least one electrode is located at a position shifted with respect to the nearest node of the raster pattern.