Development of knowledge based parametric CAD modeling system for spur gear: An approach

Abstract

In almost every mechanism, gears are extensively used machine parts to transmit power from one shaft to other with or without change of speed or direction. The need for better and efficient power transmission has increased the demand for effective gear design systems. All renowned formal gear design systems use AGMA (American Gear Manufacturers Association) standards for design. The conventional processes demand 150 to 200 man-hours to design the new optimized typical gear. Significant time reduction in design calculations can be obtained by using the soft computing tool. Additionally, advanced CAD Modeling techniques like parametric modeling can further trim down the design time. Hence, the present work is aimed to develop a knowledge-based parametric CAD modeling system for Spur Gear Design. This framework or system utilizes Knowledge Based Engineering (KBE) incorporating the rules of AGMA in design computations and parametric modeling in CAD. SolidWorks customization is carried out to generate the spur gear CAD model based on AGMA standards. Further, this system is proven as standard, faster, and simpler gear design system when compared with conventional design system. Results of this system are reasonably close to AGMA results under specific conditions. Keywords: KBE, KBS, Gear, SolidWorks, Parametric modeling, Macro