3313 Study on Micro Cutting of Tungsten Carbide by Diamond Tool

2011 ◽  
Vol 2011.6 (0) ◽  
pp. _3313-1_-_3313-4_ ◽  
Author(s):  
Hiroo Shizuka ◽  
Koichi Okuda ◽  
Masayuki Nunobiki ◽  
Yoshihiro Yokoyama
Keyword(s):  
Tungsten Carbide ◽  
Diamond Tool ◽  
Micro Cutting

Face Turning of Cobalt-Free Tungsten Carbide Using Nano-Polycrystalline Diamond Tool

2016 ◽  
Vol 1136 ◽  
pp. 245-250
Author(s):  
Akinori Yui ◽  
Takayuki Kitajima ◽  
Kenichiro Yoshitomi
Keyword(s):  
Surface Roughness ◽  
Tungsten Carbide ◽  
Diamond Tool ◽  
Brittle Materials ◽  
Polycrystalline Diamond ◽  
Zinc Dialkyldithiophosphate ◽  
Micro Cutting ◽  
Fluid Surface ◽  
Hard And Brittle Materials ◽  
Mold Life

The use of hard and brittle materials for manufacturing optical parts, such as dies and molds are required in order to extend mold life. Although, cobalt-free tungsten carbide is one of the hardest materials, micro-cutting is very difficult due to its hardness and its brittleness. This paper investigates face turning of cobalt-free tungsten carbide using a nanopolycrystalline diamond [NPD] tool and Zinc dialkyldithiophosphate (ZnDTP) fluid. Surface roughness of the cobalt-free tungsten carbide achieved was 22nmRz, which is far larger than the theoretical value. That is, traditional cutting theory does not directly apply for face turning of cobalt-free tungsten carbide using NPD tool and ZnDTP fluid.

Wear characteristics of the pointed diamond tool in ultraprecision and micro cutting of Al 6061 V-grooves

2021 ◽  
pp. 117414
Author(s):  
Zhipeng Cui ◽  
Chunyu Zhang ◽  
Haijun Zhang ◽  
Guo Li ◽  
Liqiang Wu ◽  
...  
Keyword(s):  
Diamond Tool ◽  
Micro Cutting ◽  
Wear Characteristics ◽  
Al 6061

Fabrication of Micropins Using Micro Turning Tools

2012 ◽  
Vol 523-524 ◽  
pp. 76-80 ◽  
Author(s):  
Takuya Furukawa ◽  
Yosuke Nomura ◽  
Kazuyuki Harada ◽  
Kai Egashira
Keyword(s):  
Tungsten Carbide ◽  
Electrical Discharge ◽  
Electrical Discharge Machining ◽  
Cutting Tools ◽  
Depth Of Cut ◽  
Feed Speed ◽  
Tool Breakage ◽  
Micro Cutting ◽  
Hard Materials ◽  
Micro Turning

The turning of straight micropins with a diameter smaller than 10 µm, which has not been reported so far, was carried out using micro turning tools made of cemented tungsten carbide. Tools of 50 µm diameter were fabricated by electrical discharge machining, which is suitable for fabricating micro cutting tools because it can deal with hard materials and carry out micromachining. A turning machine designed especially for micro turning tools was used in the experiments. A brass workpiece was turned using a tool with a length of cut of 100 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 10–11 µm. As a result, a straight micropin of 7.5 µm diameter and 80 µm length was successfully turned. Furthermore, turning was also performed using a tool with a length of cut of 50 µm at a feed speed of 3.0 µm/s, feed per revolution of 0.06 µm and depth of cut of 8.5–20 µm to fabricate a straight micropin of 3 µm diameter and 30 µm length. This micropin is the pin with the smallest ever diameter fabricated by turning, to the best of our knowledge, indicating the possibility of further minimization of the machinable size in turning. Turning properties were also investigated to determine the maximum depth of cut and feed speed that can be employed without tool breakage.

Influence of Tungsten-Carbide and Cobalt on Tool Wear in Cutting of Cemented Carbides with Polycrystalline Diamond Tool

2013 ◽  
Vol 7 (4) ◽  
pp. 433-438 ◽  
Author(s):  
Junsuke Fujiwara ◽  
◽  
Keisuke Wakao ◽  
Takeshi Miyamoto ◽  
Keyword(s):  
Particle Size ◽  
Tool Wear ◽  
Tungsten Carbide ◽  
Diamond Tool ◽  
Polycrystalline Diamond ◽  
Cemented Carbides ◽  
Large Particles

The influence of the tungsten-carbide (WC) particle size and Co contents of cemented carbides on polycrystalline diamond tool wear during turning was investigated experimentally. The main results obtained were as follows. (1) Tool wear increased with increasing Co content. (2) It is important to cut off the binder between the WC particles and the Co. (3) Cemented carbides containing small WC particles are more effective than cemented carbides containing large particles.

scholarly journals Investigation of Micro Cutting Characteristics for Tungsten-Carbide Green Part

2010 ◽  
Vol 19 (3) ◽  
pp. 191-196
Author(s):  
G.H. Kim ◽  
W.C. Jung ◽  
G.S. Yoon ◽  
Y.M. Heo ◽  
Y.S. Kwon ◽  
...  
Keyword(s):  
Tungsten Carbide ◽  
Micro Cutting ◽  
Green Part

Planing of Cobalt-Free Tungsten Carbide Using a Diamond Tool -Cutting Temperature and Tool Wear-

2008 ◽  
Vol 389-390 ◽  
pp. 132-137 ◽  
Author(s):  
Akinori Yui ◽  
Hiroshi Matsuoka ◽  
Takayuki Kitajima ◽  
Shigeki Okuyama
Keyword(s):  
Tool Wear ◽  
Tungsten Carbide ◽  
Diamond Tool ◽  
Contact Point ◽  
Cutting Speed ◽  
Nitrogen Gas ◽  
Argon Gas ◽  
Point Temperature ◽  
Tools Wear ◽  
Cutting Point

Diamond tools wear easily under cutting tungsten carbide. To clarify the wear mechanism, the authors composed a temperature-measurement system of a cutting point using a dual-colorinfrared pyrometer and performed planing experiments. Infrared rays, emitted from the contact point between a mono-crystal-diamond tool and a cobalt-free tungsten carbide, are transmitted though the diamond tool and an optical fiber and then they are detected by the pyrometer. Before the planing experiments, rubbing experiments were performed using a mono-crystal-diamond stick and a tungsten-carbide disk. The effects of gas environments and rubbing conditions on contact-point temperature, friction coefficient, and diamond wear were experimentally investigated. Planing experiments of the tungsten carbide using mono-crystal-diamond tool, were performed. The effects of planing conditions and gas environments on cutting-point temperature and tool wear were investigated. Through the experiments the following results were obtained. Rubbing and cutting point temperature is the highest in Argon gas followed by Nitrogen gas and is the lowest in Air. Diamond-tool wear is the greatest in Argon gas, less in Nitrogen gas, and the least in Air. The reason for this is that a chemically or physically absorbed layer of oxygen or nitrogen on tungsten carbide acts as a lubricant at the contact point. Cutting-point temperature was in proportion to cutting speed. The temperature under cutting speed at 90m/min and cutting depth at 1.0μm in Air was approximately 170degrees Celsius.

Effect of Cutting Fluid on Diamond Tool Life under Micro V-Groove Turning of Cobalt-Free Tungsten Carbide

2014 ◽  
Vol 1017 ◽  
pp. 181-186 ◽  
Author(s):  
Akinori Yui ◽  
Takayuki Kitajima ◽  
Peter Krajnik ◽  
Katsuko Harano ◽  
Hitoshi Sumiya ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Tool Life ◽  
Vegetable Oil ◽  
Diamond Tool ◽  
Rake Angle ◽  
Cutting Fluid ◽  
Tool Edge ◽  
Tool Edge Wear ◽  
Edge Wear

Micro-machining of hard dies and molds for optical parts or precision instruments is required to extend die and mold life. This paper investigates the effect of cutting fluid on diamond tool life under micro V-groove turning of cobalt-free tungsten carbide. Zinc dialkyldithiophosphate fluid (ZnDTP) displayed excellent diamond tool wear resistance in previous experiments. The performance of this cutting fluid is compared to newly developed vegetable oil based cutting fluid with dispersed MoS2 nanotubes. This paper investigates nanopolycrystalline diamond (NPD) tool life with a rake angle of 0° and-30° under continuous micro V-groove turning (i.e. face turning), of cobalt-free tungsten carbide using the developed cutting fluids. Superior diamond tool edge wear resistance is observed when using the dispersed MoS2 nanotubes in vegetable oil and using a NPD tool with a-30° rake angle.

Fabrication and cutting performance of cemented tungsten carbide micro-cutting tools

2011 ◽  
Vol 35 (4) ◽  
pp. 547-553 ◽  
Author(s):  
Kai Egashira ◽  
Shigeyuki Hosono ◽  
Sho Takemoto ◽  
Yusuke Masao
Keyword(s):  
Tungsten Carbide ◽  
Cutting Tools ◽  
Cutting Performance ◽  
Micro Cutting ◽  
Cemented Tungsten Carbide

Wear Characteristics of Various Diamond Tools in Cutting of Tungsten Carbide

2011 ◽  
Vol 325 ◽  
pp. 153-158 ◽  
Author(s):  
Akihiko Kubo ◽  
Yasushi Mochida ◽  
Junichi Tamaki ◽  
Katsuko Harano ◽  
Hitoshi Sumiya ◽  
...  
Keyword(s):  
Wear Resistance ◽  
Tungsten Carbide ◽  
Vapour Deposition ◽  
Diamond Tool ◽  
Chemical Vapour ◽  
Polycrystalline Diamond ◽  
Wear Characteristics ◽  
Diamond Tools ◽  
Flank Face ◽  
Monocrystalline Diamond

Face cutting of tungsten carbide was conducted using two monocrystalline diamond tools and three polycrystalline diamond tools to investigate the wear characteristics in terms of the crystal structure and composition of the diamond. It was found that the wear of the monocrystalline diamond tool depends on the crystal planes that form the rake face and flank face of the cutting tool, and a cleavage fracture occurs when the cutting force acts as a shear force on the (111) crystal plane. The binderless nano-polycrystalline diamond tool exhibits excellent wear resistance beyond those of the sintered polycrystalline diamond tool and chemical vapour deposition polycrystalline diamond tool, as well as better wear resistance than the monocrystalline diamond tool.

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