Nozzle-Type ELID Grinding Characteristics of Cemented Carbides

2010 ◽  
Vol 126-128 ◽  
pp. 1007-1012 ◽  
Author(s):  
Shao Hui Yin ◽  
Kun Tang ◽  
Hitoshi Ohmori ◽  
Xian Liang Zeng ◽  
Feng Jun Chen ◽  
...  
Keyword(s):  
Diamond Wheel ◽  
Systematic Investigation ◽  
Cemented Carbides ◽  
Experimental Scheme ◽  
Elid Grinding ◽  
Fine Grain ◽  
Atomic Force ◽  
Material Removal Mode ◽  
Micro Morphology ◽  
Nozzle Type

This paper reports a systematic investigation of a nozzle-type ELID grinding characteristics of cemented carbides. Two groups of experimental scheme were carried on by using fine grain cast iron diamond wheel and nozzle-type ELID grinding apparatus. The grinding forces were measured by a dynamometer and the ground surfaces were characterized using scanning electron microscopy (SEM) and atomic force microscope (AFM). The influences of electrolytic and grinding parameters on grinding force were discussed. The material removal mode and micro-morphology characteristics were also analyzed.

Experimental Research on ELID Grinding and Cutting Performance of Nano Cemented Carbide Cutters

2005 ◽  
Vol 291-292 ◽  
pp. 115-120 ◽  
Author(s):  
Fei Hu Zhang ◽  
J.C. Gui ◽  
Yi Zhi Liu ◽  
Hua Li Zhang
Keyword(s):  
Cutting Speed ◽  
Ground Surface ◽  
High Hardness ◽  
Cemented Carbide ◽  
Carbide Tool ◽  
Elid Grinding ◽  
Fine Grain ◽  
Cemented Carbide Tool ◽  
The Difference ◽  
Ground Surface Roughness

Nano cemented carbide is a new style cutter material. Because its grain size is very small, it is superior to common cemented carbide in properties, such as high hardness, fracture toughness, flexural strength and higher abrasion resistance. As a cutter material, nano cemented carbide has wide use. In this paper, nano cemented carbide tool was ground with ELID technology, and the cutting properties of nano cemented carbide were studied, and the difference in cutting properties among the ultra-fine grain, common cemented carbide and nano cemented carbide was analyzed under the same condition. Results imply that the ground surface roughness of nano cemented carbide is obviously lower than that of common cemented carbide, and the tool life of nano cemented carbide is 5-7 times longer than that of common cemented carbide at low cutting speed.

EFFECT OF COARSE-TO-FINE WC GRAIN RATIO ON MECHANICAL PROPERTIES AND ABRASIVE WEAR OF WC-8Co CEMENTED CARBIDES

Tribologia ◽  
2016 ◽  
Vol 265 (1) ◽  
pp. 103-115
Author(s):  
Der-Liang YUNG ◽  
Maksim ANTONOV ◽  
Irina HUSSAINOVA ◽  
Renno VEINTHAL ◽  
Sture HOGMARK
Keyword(s):  
Abrasive Wear ◽  
Rupture Strength ◽  
Ultrafine Grain ◽  
Cemented Carbides ◽  
Wear Properties ◽  
Fine Grain ◽  
Material Hardness ◽  
Fine Tungsten ◽  
Grain Distribution ◽  
Coarse To Fine

This study performs a comprehensive analysis concerning the amount of fine tungsten carbide (WC) grains needed for the appropriate reinforcement of the cobalt (Co) metallic binder in WC-8Co cemented carbides. The goal is to investigate the balance of coarse-to-fine grain distribution to achieve overall improvement of the material’s mechanical and wear properties. All samples possessed the same WC-8Co binder content, therefore, allowing the role of grain size distribution to be tested. It was found that a ratio of 8:1 wt% of coarse to ultrafine grain WC yielded an appropriate balance between material hardness, fracture toughness, and rupture strength. Upon adding grain growth inhibitors vanadium carbide (VC) and chromium carbide (Cr3C2), the overall wear resistance is further improved compared to undoped composites when samples are tested under abrasive wear conditions.

Study on Material Removal Mechanism of Silicon Nitride during ELID Ultraprecision Grinding

2011 ◽  
Vol 314-316 ◽  
pp. 1740-1745
Author(s):  
Wei Dong Jin
Keyword(s):  
Silicon Nitride ◽  
Material Removal ◽  
Dynamic Balance ◽  
Grinding Process ◽  
Silicon Nitride Ceramic ◽  
Elid Grinding ◽  
Hard And Brittle Materials ◽  
Plastic Shearing ◽  
Material Removal Mode ◽  
Passivating Films

Based on the analyzing ultraprecision grinding process of hard and brittle materials, taking ELID grinding of silicon nitride ceramic as an example, active control technology of passivating films state was introduced in this paper. ELID ultraprecision grinding process respectively at adaptive dynamic balance mode, discontinuous electrolyzing mode and discontinuous grinding mode had been comparatively studied. By means of AFM used for analyzing surface topography of parts, studies show that material removal method for ELID grinding is always a combination of micro brittle fracture, plastic shearing, lapping and polishing action, and which is the main material removal mode depends on the actual grinding contact state. Finally, finishing surface generating mechanism for silicon nitride in ELID ultraprecision grinding was summed up.

Experiment Study on ELID Grinding of TN85 Cermets

2011 ◽  
Vol 175 ◽  
pp. 131-135
Author(s):  
Fu Qiang Tong ◽  
Fei Hu Zhang ◽  
Dian Rong Luan
Keyword(s):  
Metal Matrix ◽  
High Hardness ◽  
Diamond Powder ◽  
Diamond Wheel ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Powder Particle Size ◽  
Matrix Composites ◽  
Elid Grinding ◽  
Ultra Precision

TN85 cermets is one kind of particle reinforced metal matrix composites, which is high hardness, good wear resistance, and bring great difficulties in processing, so it is necessary to study the processing performance. During the test on ELID grinding TN85 cermets, it is found that plastic removal is the main ways during grinding TN85 cermets materials. The powder particle size of W2.5 diamond wheel is successfully used in full removal of TN85 cermets plastic, the surface roughness value of rms: 16.81nm and Ra: 12.52nm. The results showed that: ELID grinding wheel with diamond powder technology can be used in ultra-precision machining TN85 cermets.

Development of RB Ceramics Bond Diamond Wheel for Eco-friendly ELID Grinding(Nanoprecision Elid grinding)

2005 ◽  
Vol 2005.1 (0) ◽  
pp. 225-230 ◽  
Author(s):  
Akihiko NEMOTO ◽  
Nobuhide ITOH ◽  
Teruko KATOH ◽  
Hitoshi OHMORI ◽  
Y. Murata
Keyword(s):  
Diamond Wheel ◽  
Elid Grinding

3608 Development of the nozzle type ELID grinding system for desktop type machine tool for V-Cam

2007 ◽  
Vol 2007.4 (0) ◽  
pp. 281-282
Author(s):  
Yoshihiro UEHARA ◽  
Hitoshi OHMORI ◽  
Weimin LIN ◽  
Yutaka WATANABE ◽  
Tetsuya NARUSE ◽  
...  
Keyword(s):  
Machine Tool ◽  
Elid Grinding ◽  
Type Machine ◽  
Grinding System ◽  
Nozzle Type

606 Finishing characteristics of environmental harmony type RB ceramics bonded diamond wheel on ELID-grinding

2005 ◽  
Vol 2005.41 (0) ◽  
pp. 231-232
Author(s):  
Yuhji Hasegawa ◽  
Toshiaki Ohmori ◽  
Nobuhide Itoh ◽  
Teruko Kato ◽  
Hitoshi Ohmori ◽  
...  
Keyword(s):  
Diamond Wheel ◽  
Elid Grinding

Interface structure and formation between gold and trimethylcyclohexane polycarbonate

1999 ◽  
Vol 14 (9) ◽  
pp. 3538-3543 ◽  
Author(s):  
C. v. Bechtolsheim ◽  
V. Zaporojtchenko ◽  
F. Faupel
Keyword(s):  
Photoelectron Spectroscopy ◽  
Elevated Temperatures ◽  
Cluster Formation ◽  
Systematic Investigation ◽  
Temperature Dependent ◽  
Cross Sectional ◽  
Force Microscopy ◽  
Metal Diffusion ◽  
Atomic Force ◽  
Transmission Electron

This paper presents the results of a systematic investigation of structure and formation of the interface between gold and trimethylcyclohexane polycarbonate, particularly concerning interface evolvement during gold evaporation and the influence of evaporation rate, substrate temperature, and subsequent annealing. The means of investigation were cross-sectional transmission electron microscopy, atomic force microscopy, and x-ray photoelectron spectroscopy. Extensive metal diffusion into the polymer and cluster formation near the interface were observed at deposition rates of the order of one monolayer per minute and below. The penetration depth is strongly temperature dependent. At high evaporation rates metal aggregation at the surface prevents cluster formation inside the polymer. No diffusion into the polymer was observed from metal films deposited at room temperature after extensive annealing at elevated temperatures.

Atomic force microscopy observations of domains in fine-grain PZT ceramics

2000 ◽  
Author(s):  
Zuoyi Wang ◽  
Qing Jiang ◽  
John E. Blendell ◽  
Grady S. White
Keyword(s):  
Atomic Force Microscopy ◽  
Pzt Ceramics ◽  
Force Microscopy ◽  
Fine Grain ◽  
Atomic Force

Temperatures in Grinding Cemented Carbide (YT30) with a Vacuum Brazed Diamond Wheel

2011 ◽  
Vol 487 ◽  
pp. 16-23
Author(s):  
You Ji Zhan ◽  
Yuan Li ◽  
Hui Huang ◽  
Xi Peng Xu
Keyword(s):  
Feed Rate ◽  
Diamond Wheel ◽  
Cemented Carbide ◽  
Maximum Temperature ◽  
Depth Of Cut ◽  
Grinding Temperature ◽  
Energy Partition ◽  
Dry Grinding ◽  
Grinding Conditions ◽  
Material Removal Mode

An experimental investigation is reported on the temperatures and energy partitions involved in the grinding of cemented carbide (YT30) with a vacuum brazed diamond wheel. The grinding temperature at the wheel-workpiece interface was measured using a pair of grindable foil thermocouples and the energy partition to the workpiece was evaluated by matching the analytical temperatures to the measured results. Effects of the various grinding conditions, including wheel velocity, feed rate and depth of cut, on the temperatures and the energy partition were investigated. It was determined that the wheel velocity was the most significant factor in governing the temperature relative to the depth of cut and feed rate. The maximum temperature rise at the contact zone was below 25°C in the present study. Microscopic examination of the ground surfaces and the ground detritus revealed that brittle fracture was the dominant material-removal mode. This may be one of the reasons for the low grinding temperature in grinding YT30 with a vacuum brazed diamond wheel. The energy partition values to the workpiece obtained under different grinding conditions varied from 3.3% to 20% for dry grinding YT30.

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