Gear Tooth Flank Measurement Using Dual Resolution Grids
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Solution Overview
Problem
Current contact measurement methods for gearwheel tooth flanks are time-consuming and computationally complex, especially when high precision is required, as they typically involve serial operations and low resolution, making it difficult to assess microstructure and surface properties effectively.
Innovation Solution
Implementing a dual measurement grid system where a coarser first grid covers the entire tooth flank and a finer second grid focuses on critical regions, allowing for increased precision and reduced measurement time by correlating actual measured values within a known geometric context, enabling rapid and precise surface property analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a fine measurement grid is used across the entire tooth flank to achieve high measurement precision, then measurement precision is improved, but measurement time and computational complexity increase significantly
Solution Approach 1:
The patent applies local quality by using a first coarse measurement grid for the entire tooth flank and a second fine measurement grid only for critical regions where high precision is needed. This allows the measurement system to achieve high measurement precision in critical areas while avoiding the time penalty of applying fine grids everywhere, thus resolving the contradiction between measurement precision and measurement time.
Solution Approach 2:
The measurement area is segmented into a maximum region covered by a coarse first grid and critical regions covered by a fine second grid. This segmentation allows the system to allocate measurement resources efficiently, achieving high precision where needed without proportionally increasing overall measurement time across the entire tooth flank.
2Measurement precision
If a fine measurement grid is used across the entire tooth flank to capture microstructure details, then measurement precision is improved, but computational complexity increases
Solution Approach 1:
By applying the fine second measurement grid only to critical regions rather than the entire tooth flank, the patent reduces the total number of measured values that require computational processing. This local application of high resolution maintains measurement precision in critical areas while significantly reducing the computational complexity of processing and evaluating all measurement data.
Solution Approach 2:
The computational task is segmented by dividing the tooth flank into a maximum region processed with coarse grid data and critical regions processed with fine grid data. This segmentation reduces the overall computational burden by limiting high-precision processing to only those areas where it is truly necessary.
3Productivity
If a coarse measurement grid is used to reduce measurement time, then productivity is improved, but measurement precision deteriorates
Solution Approach 1:
The patent uses a coarse first measurement grid for the entire tooth flank to maintain high productivity, while supplementing with a fine second measurement grid only in critical regions where high precision is required. This approach preserves overall productivity by avoiding comprehensive fine-grid measurement while ensuring measurement precision is maintained in areas where it matters most.
Data Source
AI summary
A method and apparatus for carrying out contact measurement on at least one tooth flank of a gearwheel workpiece including the steps of:predetermining or defining a maximum region relating to the tooth flank,predetermining or defining a critical region relating to the tooth flank that overlaps the maximum region at least in part,executing relative movements of a probe of a measuring apparatus to guide the probe along the tooth flank to obtain actual measured values with a first resolution for a plurality of locations on the tooth flank within the maximum region, andobtain actual measured values with a second resolution for a plurality of locations on the tooth flank within the critical region, wherein the second resolution is higher than the first resolution.