Ground surface integrity of granite by using dry electro-contact discharge dressing of #600 diamond grinding wheel

2009 ◽  
Vol 209 (18-19) ◽  
pp. 6004-6009 ◽  
Author(s):  
J. Xie ◽  
Y.J. Liu ◽  
Y. Tang ◽  
A. Kubo ◽  
J. Tamaki
Keyword(s):  
Surface Integrity ◽  
Ground Surface ◽  
Grinding Wheel ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Contact Discharge

A Study on Surface Generation of Metal-Bonded Diamond Grinding Wheel Dressed by Electro-Contact Discharge

2006 ◽  
Vol 304-305 ◽  
pp. 76-80 ◽  
Author(s):  
Jin Xie ◽  
Yong Tang ◽  
Junichi Tamaki
Keyword(s):  
Ground Surface ◽  
Open Circuit ◽  
Surface Generation ◽  
Grinding Wheel ◽  
Wheel Surface ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Eds Analysis ◽  
Fine Diamond ◽  
Contact Discharge

This paper conducted Electro-Contact Discharge (ECD) dressing experiment for #600 diamond grinding wheel to understand how fine diamond grits protrude from metal-bonded wheel surface. The SEM observation, EDS analysis, image processing and 3D grit modeling on wheel surface were carried out to investigate grit protrusion characteristics. Then ECD dressing and mechanical dressing experiments were carried out to identify the effect of grit protrusion feature on grinding performance. It is confirmed that the dressed wheel surface topography is sensitive to open circuit voltage Ei, discharge polarity and electrode composition. Meanwhile, ECD dressing with Ei=15V and straight polarity can produce superior protrusion topography without the damage of diamond crystal faces and the bond tail behind protrusive grit. It can obtain better ground surface of hard-brittle material than mechanical dressing with the bond tail.

Arc Envelope Truing of Metal-Bonded Diamond Grinding Wheel by Use of Cone-Shaped Truer

2006 ◽  
Vol 315-316 ◽  
pp. 421-424 ◽  
Author(s):  
Jin Xie ◽  
Junichi Tamaki ◽  
Yong Tang
Keyword(s):  
Ground Surface ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Form Accuracy ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Lean Angle ◽  
Spatial Geometry ◽  
Wheel Profile ◽  
Contact Discharge

This paper introduces a new arc envelop truing method of metal-bonded diamond grinding. It utilizes the arc profile of rotary cone-shaped truer, namely electrode, to envelop wheel profile during Electro-Contact Discharge (ECD) truing. The aim is to realize precision truing of diamond grinding wheel profile for grinding of hard-brittle material. The arc envelope truing principle of wheel profile was analyzed by the use of 3D spatial geometry to identify lean angle of the truer. Then the arc envelop truing and grinding experiments were carried out to investigate truing precision and ground surface in comparison with straight truing and GC stick truing. It was confirmed that the arc envelope truing can obtain sub-micro truing precision of metal-bonded diamond grinding wheel at the depth of cut of micro degree. It may improve greatly form accuracy and ground surface.

scholarly journals Efficient and Precise Grinding of Sapphire Glass Based on Dry Electrical Discharge Dressed Coarse Diamond Grinding Wheel

Micromachines ◽  
2019 ◽  
Vol 10 (9) ◽  
pp. 625 ◽  
Author(s):  
Yanjun Lu ◽  
Wang Luo ◽  
Xiaoyu Wu ◽  
Chaolan Zhou ◽  
Bin Xu ◽  
...  
Keyword(s):  
Surface Quality ◽  
Electrical Discharge ◽  
Ground Surface ◽  
Grinding Force ◽  
Wheel Speed ◽  
Depth Of Cut ◽  
Grinding Wheel ◽  
Feed Speed ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding

In this paper, in view of low grinding efficiency and poor ground surface quality of sapphire glass, the coarse diamond grinding wheel dressed by dry impulse electrical discharge was proposed to perform efficient and precise grinding machining of sapphire glass. The dry electrical discharge dressing technology was employed to obtain high grain protrusion and sharp micro-grain cutting edges. The influences of grinding process parameters such as wheel speed, depth of cut and feed speed on the ground surface quality, grinding force and grinding force ratio on sapphire glass were investigated, and the relationship between grinding force and ground surface quality was also revealed. The experimental results show that the grain protrusion height on the surface of a coarse diamond grinding wheel dressed by dry electrical discharge can reach 168.5 µm. The minimum line roughness Ra and surface roughness Sa of ground sapphire glass surface were 0.194 µm and 0.736 µm, respectively. In order to achieve highly efficient ground quality of sapphire glass, the depth of cut was controlled within 7 µm, and the wheel speed and feed speed were 3000–5000 r/min and 10–20 mm/min, respectively. The influences of feed speed and wheel speed on grinding force ratio were more significant, but the influence of depth of cut was little.

Experimental Study on Performance of Monolayer Brazed Diamond Wheel through Chemical-Mechanical Dressing

2011 ◽  
Vol 325 ◽  
pp. 208-212 ◽  
Author(s):  
Hong Hua Su ◽  
Jiu Hua Xu ◽  
Yu Can Fu ◽  
Wen Feng Ding ◽  
Shuai Wang
Keyword(s):  
Optical Glass ◽  
Ground Surface ◽  
Diamond Wheel ◽  
Substantial Improvement ◽  
Grinding Wheel ◽  
Dressing Method ◽  
Diamond Grinding Wheel ◽  
Diamond Grinding ◽  
Before And After ◽  
Ground Surface Roughness

The dressing methods of monolayer diamond tool have recently been developed increasingly because a substantial improvement of the ground surface roughness could be achieved with the dressed monolayer diamond tools. In this paper, a new dressing method was proposed, namely chemical-mechanical dressing of the diamond grits. Dressing experiments were carried out on the monolayer brazed diamond grinding wheel. The grit-tip distances from the base of wheel substrate were measured before and after dressing. Grinding experiments were conducted on K9 optical glass after each dressing interval. The roughness parameters of the ground surfaces were measured. The outcome of this attempt appeared highly encouraging, and the dressing of monolayer brazed diamond grinding wheel is effective with the chemical-mechanical dressing.

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