Fundamental Study on Novel On-Machine Measurement Method of a Cutting Tool Edge Profile with a Fluorescent Confocal Microscopy

We propose a novel, on-machine method of measuring the profile of the cutting edge of a tool by using the cutting fluid on the tool surface. Despite an environment of on-machine tool profile measurement, it is difficult to measure a cutting edge profile by using conventional optical methods due to interference from the cutting fluid on the tool surface. To overcome this problem, we propose a profile measurement method that uses confocal fluorescent detection from the cutting fluid on the tool surface. Moreover, for precise measurements, a method that corrects for the thickness of the cutting fluid is provided. Fluorescence from the surface of a silicon wafer coated with a fluorescent dye that is set horizontally as well as vertically to the optical axis of a developed fluorescent confocal microscope is detected. As a basic verification, the cutting edge profile of a milling tool with wear is measured using the proposed measuring and correction methods that employ a fluorescent dye. The results confirm that the proposed method can provide detailed measurements of a tool wear profile.

[1]  J. Conchello,et al.  Three-dimensional imaging by deconvolution microscopy. , 1999, Methods.

[2]  S. Hell,et al.  Aberrations in confocal fluorescence microscopy induced by mismatches in refractive index , 1993 .

[3]  Yasuhiro Takaya,et al.  Surface analysis of the chemical polishing process using a fullerenol slurry by Raman spectroscopy under surface plasmon excitation , 2013 .

[4]  Yi Yang,et al.  On-Machine Measurement of Tool Cutting Edge Profiles , 2009, Int. J. Autom. Technol..

[5]  Yasuhiro Takaya,et al.  High Precision Tool Cutting Edge Monitoring Using Laser Diffraction for On-Machine Measurement , 2012, Int. J. Autom. Technol..

[6]  M. Nouari,et al.  Wear characteristics and performance of multi-layer CVD-coated alloyed carbide tool in dry end milling of titanium alloy , 2006 .

[7]  Liu Wei,et al.  Cutting Tool Wear Detection and Tool Management Using Visual Sensors , 1999, J. Robotics Mechatronics.

[8]  Takeshi Miyamoto,et al.  Influence of Tungsten-Carbide and Cobalt on Tool Wear in Cutting of Cemented Carbides with Polycrystalline Diamond Tool , 2013, Int. J. Autom. Technol..

[9]  G. Kino,et al.  Confocal Scanning Optical Microscopy and Related Imaging Systems , 1996 .

[10]  Xiaoping Li,et al.  Tool wear acceleration in relation to workpiece reinforcement percentage in cutting of metal matrix composites , 2001 .

[11]  Wei Gao,et al.  Precision and fast measurement of 3D cutting edge profiles of single point diamond micro-tools , 2009 .

[12]  Ibrahim Ciftci,et al.  Evaluation of tool wear when machining SiCp-reinforced Al-2014 alloy matrix composites , 2004 .

[13]  P. Dearnley,et al.  Evaluation of principal wear mechanisms of cemented carbides and ceramics used for machining titanium alloy IMI 318 , 1986 .

[14]  Wei Gao,et al.  Measurement of Cutting Edge Width of a Rotary Cutting Tool by Using a Laser Displacement Sensor , 2014, Int. J. Autom. Technol..

[15]  J. Drescher.  Scanning electron microscopic technique for imaging a diamond tool edge , 1993 .

[16]  Yasuhiro Takaya.  In-Process and On-Machine Measurement of Machining Accuracy for Process and Product Quality Management: A Review , 2014, Int. J. Autom. Technol..

[17]  A. Jawaid,et al.  Tool wear characteristics in turning of titanium alloy Ti-6246 , 1999 .

[18]  Yoshiharu Namba,et al.  Diamond Tool Wear in the Ultra-Precision Cutting of Large Electroless Nickel Coated Molding Dies , 2011, Int. J. Autom. Technol..

[19]  Wei Gao,et al.  A micro optical probe for edge contour evaluation of diamond cutting tools , 2014 .

[20]  Yasuhiro Takaya,et al.  Sensing a vertical surface by measuring a fluorescence signal using a confocal optical system , 2014 .