Abstract
This research describes simple and innovative approach to reduce bending stress at tooth root of asymmetric spur gear tooth which is desire for improve high load carrying capacity. In gear design at root of tooth circular-filleted is widely used. Blending of the involute profile of tooth and circular fillet creates discontinuity at root of tooth causes stress concentration occurs. In order to minimize stress concentration, geometric continuity of order 2 at the blending of gear tooth plays very important role. Bezier curve is used with geometric continuity of order 2 at tooth root of asymmetric spur gear to reduce bending stress.
Highlights
Gears are very important part in all of machinery used in current times
In this paper a bezier curve is used with geometric continuity of order 2 at tooth root to reduce bending stress of asymmetric spur gear tooth
To reduce stress concentration at the common end point of involute tooth profile and circular fillet, Bezier curve with G2 continuity has been developed as shown in figure 3(b)
Summary
Gears are very important part in all of machinery used in current times. Gear design is an extremely difficult art. In asymmetric spur gear bending stress at tooth root is reduced as compare to standard symmetric spur gear [5,6]. For further reduction in bending stress, it is necessary to optimize root profile of asymmetric spur gear tooth. Blending of the involute profile of tooth and circular fillet creates discontinuity at root of tooth causes stress concentration occurs [7-8]. In this paper a bezier curve is used with geometric continuity of order 2 at tooth root to reduce bending stress of asymmetric spur gear tooth. Drive side pressure angle increases, base circle radius for drive side decreases compare to coast side. Whereas on coast side available profile is from tip (point D) to base circle radius (point E) as shown in figure 1.
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