Analisis Kerusakan Mesin Bubut Cnc Yungsan Cyk-660/1500 Menggunakan Metode Failure Mode And Effect Analysis (FMEA)

Abstract

The manufacturing industry is experiencing very rapid development, starting from systems, machines and other supporting equipment that makes the current manufacturing industry very effective and efficient, such as machines that use the CNC system. A CNC (Computer Numerically Controlled) machine is a machine that is controlled by a computer using code numbers, symbols and letters as command data. The combination of mechanical and computer systems will produce products that are more precise, faster and can be used for mass production. CV. Retechindo is one of the relevant practical work places for mechanical engineering students. Because you can find out the description of the fabrication and the process of making certain machine spare parts using a CNC Lathe. The CNC lathe is damaged, so what must be done is to identify the damage to the machine. The method used to analyze the damage is the Failure Mode and Effect Analysis (FMEA) method. Failure Mode and Effect Analysis is a method used to identify or analyze a failure starting from the causes of the failure, the effects it causes and the critical level of failure effects resulting from the failure. The Failure Mode and Effect Analysis method is expected to be able to find out the damage points that occur and be able to plan further maintenance before the damage occurs. At this stage, data collection was carried out by interviewing operators and various staff at CV. Retechindo and get some information that can be processed, namely in the form of information on the history of machine damage, repair processes, work processes etc. At the data processing stage, it is carried out using the FMEA (Failure Mode and Effect Analysis) method to find  defect rate of Yungsan CNC lathes. The analysis carried out is analyzing the damage that has occurred and suggestions for repairs that can be carried out based on the method used, namely FMEA. Data collection is carried out by direct observation when carrying out practical work and is carried out by interviewing CNC machine operators and field supervisors at CV. Retechindo. Based on the RPN critical value which shows a value of 25.5, it can be seen that damage including critical damage can be seen in the diagram below: The resulting RPN value influences the selection of the right repair and maintenance strategy based on the value generated by the RPN. The value of each method of damage to the CNC Milling Machine has a value from 8 to 40. With a maintenance strategy that suits each component (RPN 100). Based on Figure 4.2, there is an RPN limit value of 25.5, this value is a priority reference for carrying out preventive and maintenance actions on these components. The sledding axis components (RPN 40), bearing (RPN 36) and coolant filter (RPN 27). Based on the results of data processing and analysis using the FMEA method, it can be concluded, The results of the analysis obtained are related to component damage to the CNC Milling Machine, namely: 1. Spindle and VBelt 2. Air supply is down 3. Sledge is stuck 4. ATC is not working (Error 1039 ) 5. Servo (Error Z270-Z271) 6. Coolant pump jammed 7. Error program Based on the results of the analysis of the RPN diagram, the main components that must be carried out for maintenance and repair of the above damage are: 1. V-Belt 2. Bearing 3. Filter 4. Sledge component 5. Makadari servo battery The above components must be treated in a corrective and preventive manner, because these components have an RPN value of 40 to 18. These components are prioritized because they pass the critical RPN limit.  out and detect