Quality improvement for the production line of crankshaft

Abstract

This thesis is about the study of quality improvement in the production line of crankshaft for compressor refrigerator by reducing the failure from dimensional defects. The improvement increases the effectiveness of production line by lessen the loss from non-conforming product and increase on-time delivery and quality of product. The dimensional defect in production line can be solved by 2 methods, 1) the reduction of continuous defects and 2) the controlling of the deviation of process. In order to reduce the defects in production line immediately and effectively, the implementation plan can be divided into 3 major methods as follow: 1) the improvement in the inspection method during the production process 2) the effective maintenance and 3) the monitoring system to show the states of production line As the result of improved production-processing implementation, the percentage of non-conforming product in production line after improvement was reduced from 5.8 to 3.5.