Design of tool-state monitoring system based on current method

Abstract

Tool failure is one of the main causes of failure in CNC machine tool machining. The real-time online monitoring technology of CNC machine tool is studied, which is helpful to improve the efficiency of failure-free operation of CNC machine tool and reduce the probability of scrap and equipment failure due to tool failure. Here, the correlation between inverter input current and tool wear condition was studied first, based on which a new method about how to calculate line current on inverter input side was defined, according to definition of current virtual value. Then, a real-time monitoring system for online tool wear is designed and developed. The experimental results show that the system can reflect the tool wear condition and remind to change tool timely.

Keywords

• machine tools
• production engineering computing
• computerised monitoring
• computerised numerical control
• condition monitoring
• machining
• wear
• cutting tools
• tool-state monitoring system
• tool failure
• cnc machine tool machining
• failure-free operation
• scrap
• equipment failure
• inverter input current
• line current
• current virtual value
• real-time monitoring system
• online tool wear
• tool wear condition
• remind