Backlash optimization via compatible gear couples on the assembly lines for planetary gearboxes

Abstract

To check the data consistency of gears in each of the processes of design, manufacturing, qualification, and mounting, the data should be checked for consistency at every step of the process. The backlash (mechanical clearance) is one of the key factors changing gear mesh performance. It is inevitable due to operational needs, manufacturing errors and installation variations. In prior studies of the research, backlash minimization is conducted for only one spur/helical set gear pair, three gear trains, and planetary gearbox with using the selfcompensation methodology. By evaluating quality reports of manufactured gears, we were able to predict operating backlash during operation and determine the backlash range. After measurements, they could be classified & grouped into different assembly subgroups for minimum/targeted backlash condition. Unless out of design limits, almost no component will be wasted. The in-house software can perform prediction, minimization, and selection of the right couples. In addition to these, manufacturing companies with mounting service capacities or design companies with mounting service capacities can follow this method. In this paper, certain amount of sun, planet, and ring gears that are part of serial product planetary gearboxes are added to (excel) sheets of different runouts, tooth thicknesses under span measurement/over two balls methodologies and superimpose parameters which are sources of backlash by using manufacturing reports