The radial composite method is a testing procedure used for cylindrical gears, particularly in the context of gear accuracy and runout deviation. This method helps determine the peak-to-peak span, maximum shortwave span, and runout, which are crucial parameters for evaluating gear accuracy. AGMA 915-2-B20 (R2025): Inspection Practices – Part 2: Double Flank Radial Composite Measurement discusses inspection of cylindrical involute gears using the radial (double flank) composite method, with recommended practices detailed.
What Is Radial Composite (Double Flank) Testing?
Radial composite testing, also termed double-flank-testing, is a fast and simple functional near production test method for cylindrical gears. This technique is used in various fields, primarily in reservoir modeling and gear testing. The calibration method simulates how gears interact during meshing, allowing for the detection of errors that might not be apparent from individual component measurements. It is particularly useful for monitoring the quality of gear production, predicting potential issues before they affect gear function, and accounting for changes in properties (like permeability or fluid flow) at different distances from a central point.
What Is AGMA 915-2-B20 (R2025)?
AGMA 915-2-B20 (R2025) is an information sheet that constitutes a code of practice dealing with inspection relevant to radial composite deviations of gears when measurements are made by using a master gear in double flank contact. In providing advice on gear checking methods and the analysis of measurement results, it supplements the standard ANSI/AGMA 2015-2.
What Is Double Flank Composite Error?
The modeling of double-flank testing is the basis to develop a method for the interpretation of composite error measurements in gears. The test measures the center distance variation during one rotation of the test gear. This variation is the total composite error, which includes tooth-to-tooth error and runout error.
Hence, double flank composite error, also known as total composite error (TCE), is a measure of the total functional accuracy of a gear when it is rolled in tight mesh with a master gear. It represents the variation in center distance between the two gears during one complete rotation, essentially capturing the combined effect of all gear errors like profile, tooth thickness, and runout.
Importance of Radial Composite Testing
Radial composite method testing is important because it evaluates the combined effect of various gear errors, providing a more realistic assessment of gear performance under operating conditions. This method helps determine the accuracy grade of a gear pair and even an entire gear train, providing insights into their rolling performance and quality as a whole. By simulating the conditions under which gear operates in a transmission system, radial composite (double flank) testing is critical for detecting any errors in the early manufacturing process.
AGMA 915-2-B20 (R2025): Inspection Practices – Part 2: Double Flank Radial Composite Measurement is available on the ANSI Webstore.