Abstract
The article describes the scheme for continual improvement of manufacturing quality spur gears in terms of error profiles of the side surfaces of gear teeth. The technique is universal and applicable to any operations of gear processing. The practical application of the technique is considered by the example of gear milling with a worm gear cutter. The errors of profile include metrological indicators of total error profile, the error direction and error of form profile. The scheme of analysis of the data consists of several steps – evaluation of indicators relative to the limit values, identification of the technological structure of the profile errors and expert analysis of the profile profilograms. The final expert analysis of profilograms allows to reveal the most probable operating negative technological factors leading to deviations of a profile from nominal position. The advantage of the quality improvement scheme is its high efficiency and effectiveness in comparison with traditional methods of statistical quality management, since it does not require the collection of significant amounts of statistical information.
Highlights
The key parameters that determine the position of the contact spot during the transmission of torque in the gear are the errors of the gear profiles
The limit values of the contribution of metrological indicators of the technological structure is established in accordance with the requirements of the standard [1]
Performing expert analysis of profilogram profiles is performed to identify negative technological factors leading to the discrepancies of the values of errors and high values of the coefficients of the contribution of metrological indicators in their technological structure
Summary
The key parameters that determine the position of the contact spot during the transmission of torque in the gear are the errors of the gear profiles These parameters are provided at the finish gear grinding operation. It includes indicators of the longitudinal profile: - The total error of the longitudinal profile Fβ. Manufacturers of engineering products for the purpose of improving the quality of products are widely used methods of quality management These include probabilistic and statistical methods and control maps. The use of these standard tools requires the accumulation of a significant amount of information for the calculation of the distribution law indicators of the studied quality indicators, as well as the values of the control boundaries. The conclusion of the certification is only a signal to search for the causes of inconsistencies, but does not bring the engineering services of enterprises to the actual identification of operating in the process of negative technological factors that lead to deviations in the quality of manufactured products
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