Detection device, detection method and compensation method for tool wear

A compensation method for tool wear, applied to a machine tool comprising a tool connected to a spindle, and comprising:

• furnishing the machine tool with a first parameter set including a first cutting depth having a zero cutting depth;
• performing a cutting procedure according to the first parameter set by the machine tool, and the tool, and recording a first loading rate of the spindle by a storage device while the cutting procedure is being executed;
• setting the machine tool by a second parameter set after the cutting procedure is performed according to the first parameter set by the machine tool and the tool, wherein the second parameter set includes a second cutting depth with a non-zero cutting depth;
• performing the cutting procedure according to the second parameter set by the machine tool and the tool, and recording a second loading rate of the spindle by the storage device while the cutting procedure is being executed;
• calculating an estimated cutting force according to the first loading rate, the second loading rate and a machine performance database by an operation device;
• outputting a wear level according to the estimated cutting force and a tool wear database by a fuzzy logic unit of the operation device;
• and
• adjusting cutting locus for the tool according to the wear level by the machine tool.

A detection device for tool wear, applied to a machine tool comprising a tool connected to a spindle, and comprising:

• a control device configured to control a machine tool to perform a cutting procedure respectively according to a parameter set and another parameter set, and output a loading rate and another load rate respectively corresponding to the performing of the cutting procedures, wherein the parameter set is different from the another parameter set in machining parameter;
• an operation device configured to calculate a free-load power and a total power according to the loading rate and the another loading rate, calculate a wear coefficient set according to the free-load power, the total power and an actual cutting force, calculate an estimated cutting force according to the wear coefficient set, the free-load power and the total power, and the operation device comprising a fuzzy logic unit for outputting a wear level according to the estimated cutting force and a tool wear database;
• and
• a storage device, electrically connected to the control device and the operation device and comprising the wear database, a loading rate database and the machine performance database, the wear database being configured to store another parameter set and an actual cutting force corresponding to the another parameter set;
• the loading rate database being configured to store the loading rate outputted during the cutting procedure, and the machine performance database configured to store the parameter set, the another parameter set and the wear coefficient set.