E01 Analysis of machining errors in high speed shaping with single crystal diamond tools

2010 ◽  
Vol 2010.8 (0) ◽  
pp. 267-268
Author(s):  
Sho NAKADE ◽  
Daisuke KONO ◽  
Atsushi MATSUBARA
Keyword(s):  
Single Crystal ◽  
High Speed ◽  
Diamond Tools ◽  
Machining Errors ◽  
Single Crystal Diamond

Cutting Characteristics of Binderless Diamond Tools in High-Speed Turning of Ti-6Al-4V – Availability of Single-Crystal and Nano-Polycrystalline Diamond –

2016 ◽  
Vol 10 (3) ◽  
pp. 411-419
Author(s):  
Abang Mohammad Nizam Abang Kamaruddin ◽  
◽  
Akira Hosokawa ◽  
Takashi Ueda ◽  
Tatsuaki Furumoto ◽  
...  
Keyword(s):  
Titanium Alloy ◽  
Single Crystal ◽  
Cutting Force ◽  
High Speed ◽  
Diamond Tool ◽  
Cutting Temperature ◽  
Polycrystalline Diamond ◽  
Water Soluble ◽  
Diamond Tools ◽  
Single Crystal Diamond

In this study, the tool performance of two types of binderless diamond tools – single-crystal diamond (SCD) and nano-polycrystalline diamond (NPD) – is investigated in the high-speed cutting of titanium alloy (Ti-6Al-4V) with a water-soluble coolant. The NPD tool allows for a larger cutting force than the SCD tool by dulling of the cutting edge, despite NPD being harder than SCD. This large cutting force and the very low thermal conductivity of NPD yield a high cutting temperature above 500°C, which promotes the adhesion of the workpiece to the tool face, thereby increasing tool wear. Based on the morphology of the tool edge without scratch marks and the elemental analysis by energy-dispersive X-ray spectroscopy (EDX) of both the flank face and the cutting chips, diffusion-dissolution wear is determined to be the dominant mechanism in the diamond tool. A thin TiC layer seems to be formed in the boundary between the diamond tool and the titanium alloy at high temperatures; this is removed by the cutting chips.

Epitaxial Growth of Diamond by In-Liquid Plasma CVD Method

2017 ◽  
Vol 749 ◽  
pp. 211-216
Author(s):  
Pria Gautama ◽  
Hiromichi Toyota ◽  
Xia Zhu ◽  
Yukiharu Iwamoto ◽  
Shinfuku Nomura ◽  
...  
Keyword(s):  
Single Crystal ◽  
Epitaxial Growth ◽  
Diamond Film ◽  
High Speed ◽  
Microwave Plasma ◽  
Plasma Cvd ◽  
Tungsten Electrode ◽  
Experimental Conditions ◽  
Single Crystal Diamond ◽  
Microwave Plasma Cvd

Currently, novel method to synthesize diamond film on material substrate called as in-liquid microwave plasma CVD (IL-MPCVD) has been achieved. It has been studied and improved in addition expected as new method instead of conventional gas phase microwave plasma CVD (MPCVD). The purpose of this study is to synthesize single crystal diamond using IL-MPCVD in high speed deposition. The experimental conditions, methanol was poured in to the reactor. Each of diamond particles (100) and (111) was embedded on the stainless steel substrates (SUS632J2). It was mounted to the substrate holder of in-liquid plasma equipment and installed on the top cover. The distance between the tip of the electrode and the substrate was kept to 1.5mm. A microwave of 2.45GHz was irradiated into the quartz glass tube reactor from the rectangular cavity resonator with 4 mm diameter tungsten electrode and the plasma was generated at its tip. The microwave was adjusted in appropriate power to maintain a certain substrate temperature. Diamond films were evaluated by Raman spectroscopy, Scanning Electron Microscope (SEM) and Laser Microscope (LM). As a result, the best orientation for epitaxial growth was found to be (100) which have film growth gradually and smooth surface. Whereas (111) face has polycrystalline film with irregularity growth and rough surface. The remaining H and C after CO synthesis satisfying H/C>20 is necessary to synthesized diamond using IL-MPCVD. The deposition rate was about 32 μm/h when both single crystal and polycrystalline diamond film were synthesized.

Single-crystal diamond tools formed using a focused ion beam: Tool life enhancement via heat treatment

2014 ◽  
Vol 49 ◽  
pp. 14-18 ◽  
Author(s):  
Noritaka Kawasegi ◽  
Kazuma Ozaki ◽  
Noboru Morita ◽  
Kazuhito Nishimura ◽  
Hideki Sasaoka
Keyword(s):  
Heat Treatment ◽  
Single Crystal ◽  
Tool Life ◽  
Focused Ion Beam ◽  
Ion Beam ◽  
Diamond Tools ◽  
Single Crystal Diamond ◽  
Life Enhancement

Experimental Investigation on Precision Cutting Ti6Al4V Alloy Using Single Crystal Diamond Tools

2014 ◽  
Vol 633-634 ◽  
pp. 832-835
Author(s):  
Lin Hua Hu ◽  
Ming Zhou
Keyword(s):  
Surface Roughness ◽  
Single Crystal ◽  
Cutting Speed ◽  
Cutting Parameters ◽  
Limited Range ◽  
Machined Surface ◽  
Diamond Tools ◽  
Single Crystal Diamond ◽  
Machined Surface Roughness ◽  
Titanium Alloy Ti6al4v

In this work, cutting experiments were carried out on titanium alloy Ti6Al4V by using single crystal diamond tools to investigate the effects of cutting parameters on machined surface roughness. Experimental results show machined surface roughness decreases with increases in the cutting speed within a limited range, begins to increase as the factors reaches to certain values respectively, and decreases with increases in feed rate. Cutting depth has no significant influence on the machined surface roughness. The results also show that dominant mechanisms of the single crystal diamond tools are abrasive wear and adhesion wear.

Influence of Different Steel Alloys on the Machining Results in Ultrasonic Assisted Diamond Turning

2012 ◽  
Vol 523-524 ◽  
pp. 203-208 ◽  
Author(s):  
Benjamin Bulla ◽  
Fritz Klocke ◽  
Olaf Dambon ◽  
Martin Hünten
Keyword(s):  
Single Crystal ◽  
Injection Moulding ◽  
New Technology ◽  
Hardened Steel ◽  
Diamond Turning ◽  
Steel Alloys ◽  
Diamond Tools ◽  
Single Crystal Diamond ◽  
Ultrasonic Assisted ◽  
Optical Applications

This publication focuses on the ultra precision manufacturing of hardened steel parts with single crystal diamond tools for optical applications such as injection moulding. Nowadays optical steel moulds are nickel plated, in order to be able to machine the surface with single crystalline diamond tools. One technology that has proven its potential for replacing this procedure is the ultrasonic assisted diamond turning technique. This process allows direct machining of hardened steel with single crystal diamond tools, which is conventionally not possible due to the high tool wear. The ultrasonic assisted diamond turning process is applied in order to machine different steel alloys that are conventionally used for mould manufacturing in injection moulding. The goal is to analyze the influence of the steel alloy and the material microstructure on the machining results. The presented analysis show the capabilities of this new technology and opens the door for it to compete with established manufacturing processes, such as the manufacturing of nickel plated mold inserts.

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