DESIGN FOR MANUFACTURE AND ASSEMBLY ANALYSIS ON UNDERFRAME STRUCTURE OF HIGH SPEED TRAIN'S CARBODY

• Main Author: David
• Format: Final Project
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/83256
• Institution: Institut Teknologi Bandung

The object of analysis in this research is the underframe structure of the Indonesia high speed train’s carbody. Currently, the development of the high-speed train has passed the conceptual design phase and is planned to enter the production phase soon. To ensure the successful production of high speed train components, the manufacturability and assemblability aspects must be analyzed based on the design in advance to prevent unwanted losses in the production phase. The analysis method used in this research is design for manufacture and assembly (DFMA), which contains guidelines for the manufacturing and assembly process and quantification methods to measure the difficulty and efficiency of both processes. The DFMA analysis on the underframe structure design was conducted using two methods, which are the Lucas method and the Boothroyd-Dewhurst method. The output of the Lucas method is in the form of efficiency variables, namely functional efficiency of 51.71%, handling ratio of 3.43, and assembly ratio of 10.10. With the DFMA principle, these three values can be optimized with an improvement percentage of 45.76%, 28.20%, and 12.57% respectively. On the other hand, the Boothroyd-Dewhurst method has an output DFA index value of 11.84%. This value is considered efficient enough according to the Boothroyd-Dewhurst method so that improvement efforts are not needed. This research also discusses the comparison of the two DFMA methods used to analyze the design efficiency of underframe structures. The results show that the main differences between the two methods are in the level of information required for analysis and also in the analysis methodology. The Lucas method is more suitable for application in the conceptual design phase of the product life cycle, while the Boothroyd-Dewhurst method is more suitable for application after the parametric design of the product has been determined.