Main Article Content

Abstract

Valves play an important role while converting chemical energy into mechanical energy during the cycle in IC engine. The valves made of several processes like preparing cut bar, upsetting and forging in the premachining. At the premachining stage of valve manufacturing, there are manual and robot-assisted forging shop used to produce the head of the valve from preformed bar or bulb produced bar. In this project, the ways to reduce the unforged bar bulb at the robotassisted forge shop are found. The root cause analysis (RCA) method is used to find the problems which cause unforged bar bulb. From the analysis, It has been found that the major cause of the occurrence of the unforged bar bulb is the stem bend. Because of there is no guidance for the bar, the stem bends while upsetting and it leads other causes like loss of copper jaws life, Robot collision, die damage, etc., In order to overcome this main and other causes, the design of the upsetter stopper bush is redesigned. By doing this, the quality and quantity of valves in production are increased, the occurrence of the unforged bar bulb is reduced and stem run achieved and maintained within the limit at the premachining stage.

Article Details

How to Cite
M. Manikandan, S. Mahendiran, & A.P. Surya Chandran. (2018). Reduction of unforged bar bulb in engine valve manufacturing. International Journal of Intellectual Advancements and Research in Engineering Computations, 6(1), 475–480. Retrieved from https://ijiarec.com/ijiarec/article/view/489