Development of wireless cutting vibration monitoring device fixed to tool holder

Abstract

The aim of this study is to develop a wireless cutting vibration monitoring device fixed to a tool holder for the purpose of improving the productivity of a machining centre. A feature of the developed device is that it can be used at a low cost without modifying the machine tool. Experiments were conducted in end milling using the developed device. Simultaneous measurement was performed with a cutting dynamometer, and the results indicated that the cutting vibration for each cutting edge can be measured by the developed device. Compared with the wired accelerometer attached to the spindle head, the developed device could measure approximately ten times higher acceleration. When the cutting speed was constant, the acceleration amplitude was measured via frequency analysis of the cutting vibration, which was proportional to the cutting force, and the developed device could monitor the cutting force. The developed device could also monitor changes in vibration owing to an increase in cutting distance in groove cutting.