การปรับปรุงและพัฒนาระบบซ่อมบำรุงเพื่อเพิ่มประสิทธิภาพในการผลิตของโรงงานผลิตหม้อแปลงไฟฟ้า / พลาวุธ วงศ์วิวัฒน์ = An improvement of maintenance system for increasing production efficiency in the transformer factory / Plawut Wongwiwat
The objective of this thesis is to improve the maintenance system and build up the preventive maintenance for ERL department. This department takes care of producing special type of transformer that is used inside a microwave oven. The mentioned system was developed in order to increase production efficiency of the transformer factory in case of the working process stopped due to machine break down. The research started from the survey of general situation of the ERL department as well as studying both related researches and theories in preventive maintenance techniques and brought together to adapt into practice. In order to improve maintenance system, the researcher has divided the task into 3 parts: 1. Upgrading the maintenance system of existing maintenance section 2. Building up the preventive maintenance 3. Creating the computer program to support maintenance job. In order to upgrade maintenanece system, the researcher start from setting up the working standard, maintenance information system and completing some maintenance document. Moreover, the researcher set the daily machine check sheet to check up all machines in the ERL department. The second part of task is building up the preventive maintenance, which set to be standard and adept to 5 main machine types that were E-block welding machine, I-Block welding machine, Joint welding machine, Bracket welding machine and Terminal crimping machine. The last part of the task is to create the computer program to support the maintenance system. The researcher has designed and created 2 programs: 1. The Jig and Tool database program to control Jig and tool in store 2. The maintenance database program to redord data and work out preventive maintenance. After implementing, it was found that the average production lost time from machine break down, which was equal to 1,696.34 Man-hour/month in 1999, was decreased to 1,022.36 Man-hour/month in 2000 or 39.73% decrease. This enable to increase the production efficiency up to 5.90%.
