Abstract
Cutting force measurement is of great importance in machining processes. Hence, various methods of measuring the cutting force have been proposed by many researchers. In this work, a novel integrated rotating dynamometer based on fiber Bragg grating (FBG) was designed, constructed, and tested to measure four-component cutting force. The dynamometer consists of FBGs that are pasted on the newly designed elastic structure which is then mounted on the rotating spindle. The elastic structure is designed as two mutual-perpendicular semi-octagonal rings. The signals of the FBGs are transmitted to FBG interrogator via fiber optic rotary joints and optical fiber, and the wavelength values are displayed on a computer. In order to determine the static and dynamic characteristics, many tests have been done. The results show that it is suitable for measuring cutting force.
Highlights
Nowadays, real-time on-line monitoring of cutting force is an essential requirement in the machining processes
Studies about cutting force measurement mainly focus on direct measurement and indirect measurement of cutting force
When a broad-band light enters the fiber Bragg grating through the optical fiber, the narrow
Summary
Real-time on-line monitoring of cutting force is an essential requirement in the machining processes. Indirect measurement always detects the power or current of the spindle motor or the driving motor to reflect the cutting force [1,2,3,4]. Some researchers work on measuring the displacement of the machining tool spindle [5,6]. The indirect measurement has the advantages of simple structures and easy installation. The signals from electrical transducers are susceptible to forces of temperature, transmission, mechanical structure, and so on, so it is difficult to measure the cutting force precisely. Direct measurement of cutting force can be divided into two parts according to the installation, which are clamped on the table and mounted on the spindle
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