Development of Novel Long-Life CBN Grinding Wheel at High Efficiency Condition

2014 ◽  
Author(s):  
Kouichi Yoshimura ◽  
Akihiro Mizuno ◽  
Takeshi Mishima ◽  
Kazumasa Yoshida ◽  
Hiroshi Hoshino ◽  
...  
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Bending Strength ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Stress Cracking ◽  
Uniform Dispersion ◽  
Vitrified Cbn Wheel ◽  
Cbn Grinding Wheel ◽  
Vitrified Cbn

Vitrified CBN wheels have been widely employed for precision and high efficiency grinding in industry. However, the high stock removal grinding tends to generate the grinding burning which causes tensile residual stress, cracking and hardness softening on the ground surfaces, and it leads to shorten the wheel life. In order to overcome these issues and extend the wheel life, a novel vitrified CBN wheel has been developed. This paper describes features of bond material, and wheel structure applied to the developed CBN wheels. Grinding performances of the new wheel under high efficiency conditions are discussed. Finally it concludes that the newly developed wheel having uniform dispersion structure with new bond with high bending strength significantly improves the wheel life and the ground surface quality. The mechanism for achieving the high performance is discussed from the view point of grinding fundamentals.

Development of High Performance Monolayer Brazed Diamond Grinding Tool for Ceramics

2010 ◽  
Vol 135 ◽  
pp. 388-392
Author(s):  
Bei Zhang ◽  
Hong Jun Xu ◽  
Yu Can Fu ◽  
Hong Hua Su
Keyword(s):  
High Performance ◽  
High Efficiency ◽  
Ground Surface ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Precision Grinding ◽  
Diamond Tools ◽  
Before And After ◽  
Grinding Tool ◽  
Ceramic Grinding

This study has developed a new kind of high performance monolayer brazed diamond tool for ceramic grinding. The grit size of the diamond brazed in the grinding wheel surface is 300m, which has never been reported in diamond tools for ceramic precision machining. The experiment has achieved wonderful surface finish of Zirconia workpiece. This does owe to the designed and precision conditioned topography of the new developed grinding wheel. The topography of the grinding wheel before and after dressing has been measured by means of laser triangulation method. Then the Zirconia workpiece has been ground. The obtained Ra value decreases with no spark grinding times and the minimum Ra of the ground surface is 0.11m. The study proved that the brazed large grit diamond tools would realize high efficiency and precision grinding, namely, high performance of ceramic grinding.

Ultra-High Speed Grinding Using a CBN Wheel for a Mirror-Like Surface Finish

2005 ◽  
Vol 291-292 ◽  
pp. 67-72 ◽  
Author(s):  
M. Ota ◽  
T. Nakayama ◽  
K. Takashima ◽  
H. Watanabe
Keyword(s):  
Surface Finish ◽  
High Speed ◽  
High Efficiency ◽  
Ground Surface ◽  
Machining Process ◽  
Grinding Wheel ◽  
Cbn Wheel ◽  
Ultra High Speed ◽  
High Speed Grinding ◽  
Grinding Conditions

There are strong demands for a machining process capable of reducing the surface roughness of sliding parts, such as auto parts and other components, with high efficiency. In this work, we attempted to grind hardened steel to a mirror-like surface finish with high efficiency using an ultra-high speed grinding process. In the present study, we examined the effects of the work speed and the grinding wheel grain size in an effort to optimize the grinding conditions for accomplishing mirror-like surface grinding with high efficiency. The results showed that increasing the work speed, while keeping grinding efficiency constant, was effective in reducing the work affected layer and that the grinding force of a #200 CBN wheel was lower than that of a #80 CBN wheel. Based on these results, a high-efficiency grinding step with optimized grinding conditions was selected that achieved excellent ground surface quality with a mirror-like finish.

scholarly journals Applications of High-Efficiency Abrasive Process with CBN Grinding Wheel

Engineering ◽  
2010 ◽  
Vol 02 (03) ◽  
pp. 184-189 ◽  
Author(s):  
Yali Hou ◽  
Changhe Li ◽  
Yan Zhou
Keyword(s):  
High Efficiency ◽  
Grinding Wheel ◽  
Cbn Grinding Wheel ◽  
Abrasive Process

Energy-Mode Adjustment in Laser Processing a Small Vitrified CBN Grinding Wheel

2005 ◽  
pp. 177-182
Author(s):  
Xu Yue Wang ◽  
Yong Bo Wu ◽  
Ren Ke Kang ◽  
Jun Wang ◽  
Wen Ji Xu ◽  
...  
Keyword(s):  
Laser Processing ◽  
Grinding Wheel ◽  
Energy Mode ◽  
Cbn Grinding Wheel ◽  
Vitrified Cbn

Simulation of Vitrified CBN Grinding Wheel Abrasive Wear Based on SPH

2011 ◽  
Vol 317-319 ◽  
pp. 498-502
Author(s):  
Jing Qiang Zhang ◽  
Peng Guan ◽  
Chong Su ◽  
Wan Shan Wang
Keyword(s):  
Abrasive Wear ◽  
Grinding Wheel ◽  
Wheel Wear ◽  
Wear Model ◽  
Wear Process ◽  
Grinding Wheel Wear ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamic ◽  
Cbn Grinding Wheel ◽  
Vitrified Cbn

This paper used spatial random cutting plane method for modeling the real irregular grain shapes, and method of smoothed particle hydrodynamic (SPH) was used to establish CBN grinding wheel abrasive wear model. In order to research the wear mechanism of CBN abrasive and the relationships between grinding parameters and grinding wheel wear, simulation of the wheel abrasive wear process was simulated by the LS-DYNA explicit dynamics. According to the results obtained by simulation of abrasive wear model which has the same law with the actual wear abrasive, it is has realistic instructive significance to the actual grinding process of vitrified CBN grinding wheel.

Comparison of Power in CBN Grinding of Steels and Stone

2007 ◽  
Vol 359-360 ◽  
pp. 118-122
Author(s):  
Xi Peng Xu ◽  
Cun Ji Du
Keyword(s):  
Stainless Steel ◽  
Material Removal ◽  
High Speed ◽  
High Speed Steel ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Operating Parameters ◽  
Vitrified Cbn Wheel ◽  
Vitrified Cbn ◽  
Spindle Power

The present study was undertaken to compare the consumed power in surface grinding of three different materials with a vitrified CBN wheel. High speed steel, stainless steel, and natural granite were used as the workpiece materials in the experiments. Two different depth of cut and workpiece velocity were combined to give different material removal rates. The spindle power was in-process monitored in each pass of grinding. The radius wear of the grinding wheel was also measured and the morphologies of CBN grains were observed during the grinding of high speed steel and granite. The power for the grinding of high speed steel was found to be the lowest under any operating parameters. For other two materials, the results became complex. At shallower depth of cut, the power for the grinding of stainless steel was higher in most cases. However, the power for the grinding of granite was higher under larger depth of cut. It was found that the grinding wheel failed much earlier in the grinding of granite as compared with the grinding of high speed steel.

Porous Composite-Bonded CBN Grinding Wheel with Alumina Bubbles

2012 ◽  
Vol 565 ◽  
pp. 46-51 ◽  
Author(s):  
Z.Z. Chen ◽  
Wen Feng Ding ◽  
Jiu Hua Xu ◽  
C.J. Song ◽  
Y.C. Fu ◽  
...  
Keyword(s):  
Bending Strength ◽  
Sintering Temperature ◽  
Grinding Force ◽  
Grinding Wheel ◽  
Grinding Temperature ◽  
Porous Composite ◽  
Cbn Wheel ◽  
Regular Shape ◽  
New Type ◽  
Cbn Grinding Wheel

Fabrication experiments of porous composite-bonded CBN wheels were conducted using alumina (Al2O3) bubbles, CBN grains, Cu-Sn-Ti alloy and graphite particles. Influence of sintering parameters and porosity on the bending strength of the CBN composite blocks was measured and analyzed. Dressing and grinding practice was carried out. The results show that the optimal sintering temperature of the CBN composite blocks is 880°C. When the porosity of composite blocks is 8-45 %, the strength reaches 51-103 MPa. Regular shape of the pores is obtained after dressing. Both the grinding force and grinding temperature of the composite-bonded CBN wheel are lower than that of the vitrified one under the same grinding condition, which indicates the better grinding performance of the new-type porous composite-bonded CBN wheel.

Experiment Study on Vitrified Bonded Wheels of Quick-Point Grinding

2008 ◽  
Vol 53-54 ◽  
pp. 237-242
Author(s):  
Zi Rui Pang ◽  
Tian Biao Yu ◽  
C. Su ◽  
Jian Rong Wang ◽  
Wan Shan Wang
Keyword(s):  
Compressive Strength ◽  
High Temperature ◽  
Impact Toughness ◽  
Grinding Wheel ◽  
Experiment Study ◽  
Ansys Software ◽  
Temperature Performance ◽  
Grinding Performance ◽  
Vitrified Cbn Wheel ◽  
Vitrified Cbn

In this paper, grinding performance and Manufacturing process of vitrified CBN wheel were described for Quick-point grinding at 200m/s. In order to insure security rotation of wheel, wheel core was optimized at 200m/s based on ANSYS software. Four kinds of domestic abrasives were tested for their compressive strength, impact toughness, microcosmic crystal photographs, and oxidation temperature, high temperature performance baked at 870 °C, by right of advanced apparatus such as SEM etc. Simultaneity vitrified bonds, wheel segments and adhesive techniques were also discussed. At last, grinding performance of Quick-point Grinding wheel was tested.

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