Abstract—Gearbox cover of a 3-wheeler commercial auto is designed and fabricated. The task is to reduce the stress concentration in the Gearbox cover due to internal pressures such as crank pressure and gear shaft pressure. While analyzing the stress, stress concentration is found to be more at a location of its bolts. The stress concentration is checked in three ways and selected the one which gives the minimum stress concentration. The three ways of reducing the stress concentration are design modification, material changing without design modification and material change with design modification. The minimum stress concentration reduction by using the design modification and material change are presented here. Analysing the best the best design, proper dies are fabricated to generate gearbox cover by using CNC milling machine. The CNC milling code is generated by using Edge cam software.

Index Terms—Gear box cover, Stress reduction CNC milling

Cite: K L Narasimhamu, V Venkatesh, and Venkata Ajay Kumar G, "Analyzing Stress Concentration Reduction in Gearbox Cover and Fabrication," International Journal of Mechanical Engineering and Robotics Research, Vol. 2, No. 4, pp. 395-399, October 2013.