Process Capability Improvement of HSS Drill Bit Manufacturing Process
International Journal for Research in Applied Science and Engineering Technology
Statistical process control is very good quality inspecting tool to improve quality of products to manufacture and scores on customer satisfaction. Process capability is one of the best statistical process control technique. This research work elaborates calculation of process capability index C p and process performance capability index C pk values for manufacturing process of drill bits. based on C p and C pk values capable and non-capable parameters are identified. For non-capable parameters
... -capable parameters cause and effect diagram is used to identify the root causes affecting to process capability. corrective actions have been taken to bring the non-capable parameter's process capability up the standard level by iterations. By using this approach, we improve C p values for point angle 0.94 to 1.47, for chip breaker angle 0.65 to 1.47, for web after notch 0.83 to 1.23 and C pk values for point angle 0.72 to 1.33, chip breaker angle 0.32 to 1.33, web after notch 0.26 to 0.75.