Crankshaft Hardness Quality Evaluation of Passenger Car

A crankshaft is a part of the main engine components and plays critical role in car performance. The component consists journals, pins, flange that experience induction hardening treatment to increase their hardness. Hardness case depth represents important hardness criteria achieved by process. This paper aims evaluate quality analyzing measurement. control chart shows results, which presents process stability indicate abnormal processes. capability also performed consideration. Evaluation results show not at its best performance even though meets product requirements. Affected factors are manpower, method, material, measurement, machine environment. Implemented improvements based on problem root cause eliminate influenced achieve stable delivered.