Investigation and Development of Non-Symmetric Gear System using Matlab Graphical User Interface (GUI) ® and Autodesk Inventor

Abstract

The paper presents a method for developing non-symmetric spur gearing system. The tooth profile of this distinct gearing is formed by involutes having two different involute profiles with different diameters of the base circles. They have best performances in relation with the traditional one. Hitherto, its gear tooth doesn't adopt any specific standard or rather use any typical notation, as they are still under the research and development phase. Presently, development of a robust simulation tool which can consider different parameters of NSPG is of great importance. In the present work, an algorithm for the development of geometry of Non-Symmetric Pinion and Gear (NSPG) tooth and its complete tooth profile is proposed. The algorithm was executed through Matlab Graphical User Interface (GUI) coding. The GUI takes the major input parameters of NSPG. The output of calculated values of the gear parameters are displayed in their corresponding text blocks. A provision on the single tooth plot provides the plot of the tooth space of the pinion or gear. The complete gear profile is obtained through a mouse click of a pushbutton provided for pinion or gear plot. The output coordinates points Xn, Yn, Zn of the involute and trochoidal root fillet are stored in the Excel / Text files, which is imported to develop curve and 3D modeling of gear in Autodesk Inventor or similar such CAD software and the NSPG 3D Solid model was completed. The outcome proves worthy in investigating the critical geometric parameters of standard and non-standard spur gear system, and paves a way for static, dynamic stress analysis and kinematic analysis. This tool can be extensively used by gear designers, educators, who are desirous of designing high performing gears, which can be developed with lowest possible time, that much reduces the design cost and time to market.