Research On Multi-station Progressive Die Of Car Window Motor Rotor

Window lift motor must small, low noise, reliable, resistance to electromagneticinterference. Manufacturing process of motor rotor core directly affects the productionand development of window lift motor. The application of multi-station progressivedies can improve the accuracy and production efficiency of window lift motor rotorcore greatly, and lower production costs. This paper uses theoretical analysis andnumerical simulation combining experimental validation to improve efficiency ofrotary riveting system, improve the reliability and performance of mold.In order to improve the performance and production efficiency of window liftmotor rotor core, Rotary riveting system and automatic fold riveting technology wasused to design the mold. The automatic folding riveting technology theory and thestructure of rotary safety mechanism were introduced. The deformation and stress ofmaterial in the process of die cutting was analyzed. The layout of motor rotorlaminations was designed.In order to improve the turning speed of the multi-station progressive dies andguarantee work reliability of mold, three-dimensional model of rotary riveting systemwas established by Solidworks Motion, rotary riveting system consists three differentforms of rotary sets, dynamics model was analyzed, respective. The research resultsshow that different materials have significant influence on torque of rotary sets, rotarysets made by titanium alloy required minimum motor torque and have the fastestrotating speed, and the precision of the rotary system was discussed.To ensure the reliability of components, Three-dimensional model of motor rotormulti-station progressive die was established by Logopress, and finite elementsimulation of key components was analyzed by ANSYS Workbench to achieve thestress and strain features of parts. Punch structure was optimized, and then fatigue lifeanalysis was conducted. Research results show that the design of multi-stationprogressive dies parts meet the strength requirements, comply with the designrequirements. The maximum equivalent stress and the maximal displacement wasreduced after optimization, the quality had a little increase, the arc transition which isin the middle of the punch has the shortest life.Processing and assembly, and to try the multi-station progressive dies stampingtest and giant slalom fold riveting experiment.Results show that the design of multi-station progressive dies under the condition of350times/min stamping speedcan still work normally. The multi-station progressive dies and rotary riveting systemdesign was verified reliable.