• Bhagyashri Sonawane
• M. S. Patil

In automobiles, clutch pedal assembly is used to engaged or disengaged the gears. In this assembly the pivot pin is used to connect the clutch pedal with the push rod. This pin is getting failed during operation. Due to this sudden failure of clutch pedal pin without giving any alert, the clutch plate may get stucked or jammed within the clutch pedal assembly. This phenomenon may occur during shifting of gear or while applying brakes, which leads to severe accidents. Hence it is necessary to increase the life of pivot pin and to reduce the failure rate of pivot pin with cost effective solution. Investigation of failed part reveals that sudden application of maximum stresses, cyclic stresses, variable loading condition and bearing forces developed in the material of pin leads to failure. Hence to improve properties of material, the different heat treatments like carburizing, nitriding and carbo-nitriding are used. To decide the one process from above all, we go through tensile test, hardness test and wear test, etc. After comparing results of all the heat treated samples of all the heat treatment methods reveals that carbonitriding process is good for pivot pin. Then the case depth obtained from this heat treatment is use for the new design of pivot pin. The newer design is checked with tensile test by applying maximum force conditions of clutch pedal assembly. As well the results obtained from tensile test were comparing with FEA analysis; it shows that design of pivot pin is safe. The combination of best heat treated method and newer design of the pivot pin gives reduction in mass of existing pivot pin. This gives the cost effective solution and better replacement to the existing pivot pin of material SAE1117.

"Failure Analysis and Mass Reduction of Pivot Pin of Clutch Pedal Assembly Using Heat Treatments", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.5, Issue 8, page no.288-294, August-2018, Available :http://www.jetir.org/papers/JETIR1808338.pdf

"Failure Analysis and Mass Reduction of Pivot Pin of Clutch Pedal Assembly Using Heat Treatments", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.5, Issue 8, page no. pp288-294, August-2018, Available at : http://www.jetir.org/papers/JETIR1808338.pdf