Pulse Laser Grinding Processing of Polycrystalline CVD Diamond Coated Cutting Tool Edge with Femtosecond Laser

2019 ◽  
Author(s):  
Xiaoxu Liu ◽  
Kohei Natsume ◽  
Satoru Maegawa ◽  
Fumihiro Itoigawa
Keyword(s):  
Femtosecond Laser ◽  
Pulse Laser ◽  
Cutting Tool ◽  
Cvd Diamond ◽  
Tool Edge

Development of High-Performance Polycrystalline CVD Diamond Coated Cutting Tool Edge With Femtosecond Laser

2020 ◽  
Author(s):  
Xiaoxu Liu ◽  
Kohei Natsume ◽  
Satoru Maegawa ◽  
Fumihiro Itoigawa
Keyword(s):  
Surface Modification ◽  
Femtosecond Laser ◽  
Pulse Laser ◽  
Laser Fluence ◽  
High Performance ◽  
Short Pulse ◽  
Cvd Diamond ◽  
Diamond Surface ◽  
Nanosecond Laser ◽  
Tool Edge

Abstract To realize the high performance of CVD diamond coated tools, a tool edge shaping process named pulse laser grinding (PLG) was developed with short pulse laser in our group previously. In this study, femtosecond laser was innovatively to be used to conduct the PLG process, since femtosecond laser is famous for its less thermal impact and some newly reported surface modification effect. The results show that PLG processing under high laser fluence of femtosecond laser could achieve roundness around 1 μm, which is similar to that of conventional PLG process with nanosecond laser, although the roughness of processed surface has been worse due to the redeposited debris. Furthermore, an interesting phenomenon has been confirmed again that under low laser fluence irradiation of femtosecond laser, the CVD diamond surface shows improved crystallinity of diamond structure. Based on this, a two-step tool edge processing method was proposed, which could realize the edge shaping and surface modification together with one laser processor. And the results show that the processed tool edge with much less edge roundness and surface roughness, and the tip part with better diamond crystallinity, indicating that sharper and hardness tool edge could be possibly to be realized with femtosecond laser.

Edge shaping of CVD diamond coated cutting tool with ultrashort pulse laser

2019 ◽  
Vol 2019 (0) ◽  
pp. S13204
Author(s):  
Xiaoxu LIU ◽  
Kohei NATSUME ◽  
Satoru MAEGAWA ◽  
Fumihiro ITOIGAWA ◽  
Shingo ONO ◽  
...  
Keyword(s):  
Pulse Laser ◽  
Ultrashort Pulse ◽  
Cutting Tool ◽  
Cvd Diamond ◽  
Ultrashort Pulse Laser

scholarly journals Micromachining of polycrystalline CVD diamond-coated cutting tool with femtosecond laser

2020 ◽  
Vol 14 (4) ◽  
pp. JAMDSM0059-JAMDSM0059
Author(s):  
Xiaoxu LIU ◽  
Kohei NATSUME ◽  
Satoru MAEGAWA ◽  
Fumihiro ITOIGAWA
Keyword(s):  
Femtosecond Laser ◽  
Cutting Tool ◽  
Cvd Diamond

Wear phenomenon analysis apparatus of cutting tool edge and evaluation of several tool edges

2020 ◽  
Vol 2020 (0) ◽  
pp. S13311
Author(s):  
Yuhei KATO ◽  
Hiroshi TANAKA ◽  
Yoshitsugu KAWASE ◽  
Yoichi AKAGAMI
Keyword(s):  
Cutting Tool ◽  
Tool Edge

scholarly journals A Comparison of the Probes with a Cantilever Beam and a Double-Sided Beam in the Tool Edge Profiler for On-Machine Measurement of a Precision Cutting Tool

Machines ◽  
2021 ◽  
Vol 9 (11) ◽  
pp. 271
Author(s):  
Bo Wen ◽  
Sho Sekine ◽  
Shinichi Osawa ◽  
Yuki Shimizu ◽  
Hiraku Matsukuma ◽  
...  
Keyword(s):  
Cantilever Beam ◽  
Cutting Tool ◽  
Displacement Sensor ◽  
Laser Displacement Sensor ◽  
Tool Edge ◽  
Edge Profile ◽  
Measurement Principle ◽  
Beam Type ◽  
Tool Position ◽  
Tool Cutting

This paper describes a comparison of the mechanical structures (a double-sided beam and a cantilever beam) of a probe in a tool edge profiler for the measurement of a micro-cutting tool. The tool edge profiler consists of a positioning unit having a pair of one-axis DC servo motor stages and a probe unit having a laser displacement sensor and a probe composed of a stylus and a mechanical beam; on-machine measurement of a tool cutting edge can be conducted with a low contact force through measuring the deformation of the probe by the laser displacement sensor while monitoring the tool position. Meanwhile, the mechanical structure of the probe could affect the performance of measurement of the edge profile of a precision cutting tool. In this paper, the measurement principle of the tool edge profile is firstly introduced; after that, slopes and a top-flat of a cutting tool sample are measured by using a cantilever-type probe and a double-sided beam-type probe, respectively. The measurement performances of the two probes are compared through experiments and theoretical measurement uncertainty analysis.

Characteristics Research of Gallium Arsenide Solar Cells under Femtosecond Laser Illumination

2014 ◽  
Vol 941-944 ◽  
pp. 575-579
Author(s):  
Si Xiao ◽  
Yi Tan Gao ◽  
Xiu Qin Tian ◽  
Jun He
Keyword(s):  
Gallium Arsenide ◽  
Solar Cells ◽  
Femtosecond Laser ◽  
Pulse Laser ◽  
Conversion Efficiency ◽  
Femtosecond Pulse ◽  
Damage Threshold ◽  
Laser Illumination ◽  
Femtosecond Pulse Laser ◽  
Continuous Waves

Femtosecond laser with ultrashort pulse (≤35fs) is used to investigate the damage threshold and light-to-electric conversion efficiency of gallium arsenide solar cells. Different from nanosecond or picosecond lasers, the damage threshold of the solar cell illuminated by femtosecond laser is slightly higher than that under the illumination of continuous-waves laser with the same wavelength. Because the thermal non-equilibrium effect becomes obvious, heat conduction phenomenon no longer obeys the law of Fourier, when the heating pulse time of femtosecond laser is equal to or shorter than the electron-phonon coupling time. The photovoltaic properties of gallium arsenide solar cells under femtosecond pulse laser illumination are measured. The device shows better short circuit current and the light-to-electric conversion efficiency under femtosecond pulse laser than that under continuous-waves laser of the same wavelength.

Surface polishing of CVD diamond coating by femtosecond laser

2019 ◽  
Vol 27 (1) ◽  
pp. 164-171
Author(s):  
马玉平 MA Yu-ping ◽  
张 遥 ZHANG Yao ◽  
魏 超 WEI Chao ◽  
李 翔 LI Xiang
Keyword(s):  
Femtosecond Laser ◽  
Cvd Diamond ◽  
Diamond Coating ◽  
Surface Polishing ◽  
Cvd Diamond Coating

An Investigation of Lateral Surface Hardness and Related Cutting Forces in One-Directional Ultrasonic-Vibration Assisted Turning

2012 ◽  
Vol 445 ◽  
pp. 1041-1046
Author(s):  
Hamed Razavi ◽  
Mohammad Javad Nategh ◽  
H. Soleimanimehr
Keyword(s):  
Cutting Force ◽  
Lateral Surface ◽  
Cutting Tool ◽  
Cutting Speed ◽  
Surface Hardness ◽  
Tangential Direction ◽  
Feed Speed ◽  
Machined Surface ◽  
Average Force ◽  
Tool Edge

The experimental investigation of UAT shows that the movement of cutting tool edge relative to the workpiece results from the cutting speed, feed speed and tools vibration in tangential direction affects the lateral machined surface of workpiece and leaves a repeating pattern of toothed regions on it. In UAT process, because of constant feed rate of tool toward workpiece, the cutting tool never separates from workpiece, though the tool rake face may separate periodically from chip in every cycle of vibration. This results in an increase in the surface hardness of the lateral machined surface in comparison with conventional turning (CT). The results of the present study confirm the advantage of UAT as far as the lower cutting force is concerned compared with CT. The higher surface hardness of the lateral surface observed in UAT causes the maximum cutting force to increase but the average force decreases with respect to CT.

Development of Technological Means for Formation of Multilayer Composite Coatings, Providing Increased Resistance of Carbide Tools, for Different Machining Conditions

2013 ◽  
Vol 581 ◽  
pp. 55-61 ◽  
Author(s):  
Vladimir P. Tabakov ◽  
A.S. Vereschaka
Keyword(s):  
Rational Choice ◽  
Tool Life ◽  
Cutting Tool ◽  
Composite Coatings ◽  
Multilayer Coating ◽  
Multilayer Composite ◽  
Carbide Tool ◽  
Carbide Cutting Tool ◽  
Tool Edge ◽  
Technological Means

The present work documents the results of development a methodological and technological means for the formation of multilayer composite coatings essential to increasing the tool life of a cemented carbide cutting tool edge. A methodology, based on of a rational choice of structure, architecture, and properties of a multilayer coating for tool edge working in various cutting conditions, is formulated. The results demonstrate an increase of efficiency of the carbide tool edge life based on the methodology stated above, and are presented here.

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