Analisis Proses Pemesinan Komponen Rumah Isolating Cock Air Brake System Kereta Api

Abstract

The isolating cock housing is one of the important components of a railway air-brake system, functioning as a valve housing that regulates and shuts off the airflow within the braking system. Its manufacturing process requires high precision because dimensional inaccuracies and poor machining quality may affect the performance and reliability of the braking system. This research aimed to analyze the machining process of the isolating cock housing component, identify the machining parameters used, and compare the theoretical and actual machining times based on turning and drilling processes. The method used was a case study through direct observation at the Manufacturing and Industrial Engineering Division, Railway Facilities Production Department, PT. XYZ. Data were obtained through observations of the production process, interviews with operators and field supervisors, dimensional measurements using a micrometer, vernier caliper, and CMM Laser Tracker & Arm. The analysis focused on spindle speed, feed rate, cutting speed, cutting time, and dimensional measurement results. The analysis showed that the manufacturing process of the isolating cock housing component involved several turning and drilling stages, with machining parameters adjusted to the type of operation and the characteristics of the nodular cast iron material. Comparison of theoretical and actual data revealed differences in machining time, influenced by operating parameters and actual process conditions in the field. Evaluation of the measurement results indicated that the machining process was capable of producing component dimensions within the specified tolerances. This analysis provides an understanding of the relationship between machining parameters, time efficiency, and component quality