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

Experimental Investigation on Bronze-Bonded CBN Formed Grinding Wheel by Means of Electro-Discharging Dressing

2016 ◽  
Vol 1136 ◽  
pp. 97-103
Author(s):  
Jian Wu Yu ◽  
Li Hua He ◽  
Hong Luo ◽  
Shao Hui Yin
Keyword(s):  
Electrical Discharge ◽  
High Efficiency ◽  
Pulse Current ◽  
Precision Machining ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Abrasive Grains ◽  
Finishing Process ◽  
Discharge Parameters ◽  
Cbn Grinding Wheel

High-efficiency and precision machining of complicated components can be realized by using metal-bonded CBN grinding wheel. However, the difficulty in dressing those superabrasive grinding wheels is one of the main obstructions to popularize its application in industry. Different from the traditional methods, the aim of the paper is to investigate the electro-discharge dressing of bronze-bonded CBN formed grinding wheel. Based on the analysis of electrical discharge parameters and grinding performance, the results show that electro-discharge dressing of CBN formed grinding wheel is feasible. With the increase of pulse duration, pulse voltage and pulse current, the dressing efficiency is increasing, more abrasive grains are protruding, but surface topography of grinding wheel is worsen. Therefore, grinding tests show that, in order to get the dressing quality better and keep the dressing efficiency higher, the bigger electrical discharge parameters are chosen for rough dressing process and the smaller ones are chosen for finishing process.

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.

Surface integrity of quenched steel 1045 machined by CBN grinding wheel and SiC grinding wheel

2017 ◽  
Vol 8 (2) ◽  
pp. 179-187 ◽  
Author(s):  
Kankan Ji ◽  
Xingquan Zhang ◽  
Shubao Yang ◽  
Liping Shi ◽  
Shiyi Wang ◽  
...  
Keyword(s):  
Surface Roughness ◽  
Surface Morphology ◽  
Compressive Stress ◽  
Surface Integrity ◽  
Grinding Wheel ◽  
Micro Hardness ◽  
Content Type ◽  
Quenched Steel ◽  
Cut Depth ◽  
Cbn Grinding Wheel

Purpose The purpose of this paper is to evaluate surface integrity of quenched steel 1045 ground drily by the brazed cubic boron nitride (CBN) grinding wheel and the black SiC wheel, respectively. Surface integrity, including surface roughness, sub-surface hardness, residual stresses and surface morphology, was investigated in detail, and the surface quality of samples ground by two grinding wheels was compared. Design/methodology/approach In the present work, surface integrity of quenched steel 1045 machined by the CBN grinding wheel and the SiC wheel was investigated systematically. All the specimens were machined with a single pass in the down-cutting mode of dry condition. Surface morphology of the ground specimen was observed by using OLYMPUS BX51M optical microscopy. Surface roughness of seven points was measured by using a surface roughness tester at a cut-off length of 1.8 mm and the measurement traces were perpendicular to the grinding direction. Sub-surface micro-hardness was measured by using HVS-1000 digital micro-hardness tester after the cross-section surface was polished. The residual stress was tested by using X-350A X-ray stress analyzer. Findings When the cut depth is increased from 0.01 to 0.07 mm, the steel surface machined by the CBN wheel remains clear grinding mark, lower roughness, higher micro-hardness and higher magnitude of compressive stress and fine microstructure, while the surface machined by the SiC grinding wheel becomes worse with increasing of cut depth. The value of micro-hardness decreases, and the surface roughness increases, and the surface compressive stress turns into tensile stress. Some micro-cracks and voids occur when the sample is processed by the SiC grinding wheel with cut depth 0.07 mm. Originality/value In this paper, the specimens of quenched steel 1045 were machined by the CBN grinding wheel and the SiC wheel with various cutting depths. The processing quality resulted from the CBN grinding wheel is better than that resulted from the SiC grinding wheel.

scholarly journals Development of sintered composite stick for dressing CBN grinding wheel.

1987 ◽  
Vol 53 (7) ◽  
pp. 1123-1127
Author(s):  
Setsuo SUZUKI ◽  
Junichi ASAMI ◽  
Keiichi ASAHINA ◽  
Kinichi MACHINO
Keyword(s):  
Grinding Wheel ◽  
Sintered Composite ◽  
Cbn Grinding Wheel

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.

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