Methods of Quality Control Manufacturing Gears of the Differential Satellites

The features of bevel gears in differentials of heavy vehicles are considered. Attention is drawn to the inability to adjust the position of the satellites and gears, which imposes a rigid condition on the provision of the geometrical parameters of the gear rims. The content of the universal method for controlling the quality of the manufacture of machine parts at the same time by a set of interrelated accuracy indicators is disclosed. The peculiarity of the method is the consistent application of various methods of product quality management—probabilistic-statistical analysis, control, correlation analysis for each key indicator of accuracy. The advantage of the technique is the development of the content of corrective actions, taking into account the action of the main set of technological factors acting in the part processing operation. Information is given on the selection of key parameters of the satellite differential of geometric accuracy indicators, as well as indicators of the quality of the contact patch. The fact of insufficient information content of the standard method of rationing indicators of the quality of the contact patch has been established. The main provisions of the improved methodology are considered, with the addition of indicators of the relative location of contact patches. The content of corrective actions that leads to the improvement of the complex of indicators of the quality of the satellite of the differential is shown. The method allows formulating corrective actions as operative actions that can be performed without lengthy preparation, as well as engineering-technological measures, for which it is necessary to carry out local production preparation procedures. The data on the achieved improvement in the values of quality indicators, as a result of a single verification of the effectiveness of corrective actions, are given.