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suharjo
Universitas Batam
Aerospace Engineering Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Mechanical Engineering

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Optimization of the 18 mm Hole Drilling Process for HMS 6020 Excavator Bracket Cover Through Tool Redesign Using Cp/Cpk Analysis suharjo; ayu pratiwi a; Taufik Indrianto
Jurnal Teknik Mesin (Journal Of Mechanical Engineering) Vol. 15 No. 02 (2026)
Publisher : Universitas Mercu Buana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/jtm.v15i02.39121

Abstract

This study aims to optimize the drilling process of 18 mm diameter holes in excavator cover brackets through a tool redesign. Previously, the hole drilling process required 58 minutes of cycle time, using two different tools for drilling and chamfering the hole entrance. This lengthy processing time can be reduced by redesigning the tool. In this study, the drilling and chamfering tools were integrated into a single tool. This integration eliminates repetitive tool changes during the machining process.The research employed an experimental approach by modifying the tool design and testing the drilling parameters on a CNC machine to ensure that product quality was maintained. The evaluation was conducted by analyzing process capability data (Cp and Cpk) using Minitab version 22 software. The results show that the redesigned tool successfully reduced the cycle time to 22 minutes, representing a 62% reduction, without compromising production quality. The Cpk values for hole diameter, depth, and chamfer remained above 1.33, indicating that the process after tool replacement remained highly capable and stable. It can be concluded that redesigning the tool is an effective solution for improving production efficiency without reducing product quality.
Co-Authors ayu pratiwi a Taufik Indrianto