Analysis of Torque Effect on Control Block Housing Integrity

Abstract

This study investigates the impact of tightening torque variations on the structural integrity of Control Block Housing at PT Schneider Electric Manufacturing Batam. Inconsistent torque application has been identified as a primary driver of fastening defects, including material cracking, loose screws, and gap misalignments, which compromise product reliability and operational efficiency. A quantitative experimental approach integrated with Statistical Process Control (SPC) was employed to analyze and optimize the assembly process. Torque data were collected from 50 samples using a digital torque meter, centered on a target specification of 1.00 Nm with a tolerance of ±0.10 Nm. Initial assessments revealed a non-capable process with a Cpk of 0.33 and a high defect rate of 20%, predominantly caused by under-torque conditions. Following the implementation of optimized torque settings and enhanced monitoring protocols, the process capability significantly improved, achieving a Cpk of 1.33 and reducing the defect rate to 6%. These results demonstrate that SPC-based optimization effectively stabilizes torque application, ensures fastening integrity, and fosters continuous quality improvement. This research provides a scalable framework for enhancing production efficiency and product performance within the semiconductor and electronic manufacturing sectors.