Cyclic Nucleation Cleaning for Complex Workpiece Geometries
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Solution Overview
Problem
Current methods for assessing technical cleanliness of workpieces with complex geometries are inadequate, as they fail to ensure uniform wetting and discharge of contamination from internal and external surfaces, leading to incomplete analysis and potential damage to the workpiece.
Innovation Solution
The cyclic nucleation process involves alternately exposing a medium to negative and positive pressure, creating gas bubbles that collapse and release particles and dirt from hard-to-reach areas, ensuring thorough cleaning and contamination removal through a closed container system with sensors for monitoring contamination levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If direct exposure flushing methods are used for simple geometries, then particle and filmic contamination can be removed, but for complex geometries with internal channels and blind holes, uniform wetting and complete contamination discharge cannot be ensured
Solution Approach 1:
The patent employs periodic pressure cycling between negative and positive pressure to create cyclic nucleation and collapse of gas bubbles. This periodic action ensures repeated wetting and flushing of complex geometries, allowing contamination to be progressively removed from internal channels and blind holes that cannot be reached by single-pass direct exposure methods
Solution Approach 2:
The patent utilizes phase transitions of gas bubbles through cyclic nucleation (formation) and collapse. By alternately applying negative pressure to nucleate bubbles and positive pressure to collapse them, the method creates mechanical冲击 effects that dislodge and remove contamination from difficult-to-reach areas, achieving complete wetting and contamination discharge for complex geometries
2Productivity
If the medium is continuously used for cleaning workpieces, then productivity is maintained, but the medium becomes contaminated and loses cleaning effectiveness
Solution Approach 1:
The patent incorporates sensors that continuously monitor the contamination level of the medium and provide feedback to the control system. When the contamination reaches a predetermined threshold, the system automatically triggers medium replacement or regeneration, ensuring the medium maintains its cleaning effectiveness while maximizing its usable life for continuous productivity
Solution Approach 2:
The patent implements a medium management system that discards contaminated medium and replaces it with fresh medium when contamination thresholds are reached. The system may also regenerate and reuse medium through filtration and cleaning processes, thereby maintaining cleaning effectiveness (reliability) while enabling continuous operation (productivity) through strategic medium replacement and recovery
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 method allows for accurate and comprehensive cleanliness analysis of workpieces with complex geometries, ensuring complete wetting and contamination removal, independent of the workpiece's architecture, and extends the medium's usability by periodic replenishment and filtration, maintaining cleaning effectiveness.
Implementation Method 1
The medium is alternately exposed to a negative pressure and a positive pressure in order to carry out one or more cyclic nucleations
Implementation Method 2
creating gas bubbles that collapse and release particles and dirt from hard-to-reach areas
Implementation Method 3
The actual state of the medium is determined by one or more sensors
Data Source
AI summary
A method and a device for providing a medium by means of cyclic nucleation, wherein the medium is introduced into a sealed container and during the cyclic nucleation said medium is alternately exposed to a negative pressure and a relative positive pressure, the method being characterised by the following steps: - calculating an initial condition (A) of the clean medium before a workpiece is introduced and an actual condition (I) of the contaminated medium after the first workpiece has been introduced and n cyclic nucleation cycles have been carried out, - adding an additional medium as soon as a first contamination degree (V1) of the medium has been reached after n workpieces have been introduced into the medium, until the actual value (I) reaches a first reference value (R1), - subsequently introducing additional workpieces until a further contamination degree (Vn) is reached, - then adding an additional medium until the actual condition (I) reaches another reference value (Rn), and - removing the medium from the container as soon as the actual condition (I) reaches a maximum contamination (Vmax).