DEVELOPMENT OF CNC MACHINING CENTER COMPONENT CONDITION MONITORING BASED ON MACHINE TOOLS DISPLACEMENT HISTORY

• Main Author: Vincensius Manurung, Sergio
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/68016
• Institution: Institut Teknologi Bandung

CNC machine is one of the advanced technology in the industry because of its capability to do machining processes with high accuracy and precision. This machines could also continuously perform its automatic machining process. Meanwhile, the wear of CNC machine tools components, such as spindle bearings, ball screw shaft bearings, ball screw and linear motion (LM) guides, significantly affect the machine tools geometric accuracy. The wears are generally monitored by vibration measurement. In Industrie 4.0 era, online monitoring is demanded. However, most of CNC machine tools have not yet been designed for the purposes. Nevertheless, the problems could be solved by developing additional interfaces, as well as some software, for bridging between the online monitoring server and corresponding machines. By using interfaces, work table movement is monitored along with feedrate and ballscrew bearings loads that calculated in realtime. The table movement and the feedrate is tracked by reading the NC program. While the bearing load is calculated by its correlation with the power output of the servo motor. These procedure could extended for calculating bearings load for x-axis components as well as y-axis components and this could be beneficial to the online monitoring research as well as machine tools maintenance research. The result of this online monitoring method is a software to monitor the table work movement and bearing loads of the Vertical Machining Center. The remaining life is predicted such as 99.99999058% at axis-X and 99.99999171% at axis-Y when this software is applicated to a Sample Program,.