Quantitative evaluation on abrasion loss and grinding performance of hollow-sphere belt based on geometric characteristics of abrasive grains

2022 ◽  
Vol 74 ◽  
pp. 177-189
Author(s):  
Qinghong Wan ◽  
Lai Zou ◽  
Jing Ou ◽  
Tingting Wang ◽  
Xifan Liu ◽  
...  
Keyword(s):  
Quantitative Evaluation ◽  
Hollow Sphere ◽  
Geometric Characteristics ◽  
Abrasive Grains ◽  
Abrasion Loss ◽  
Grinding Performance

scholarly journals Influence of technological system’s rigidity on the dynamics of grinding process of flexible parts

2018 ◽  
Vol 226 ◽  
pp. 02002
Author(s):  
Sergey A. Voronov ◽  
Igor A. Kiselev ◽  
Weidong Ma
Keyword(s):  
Surface Quality ◽  
Random Distribution ◽  
Turbine Blades ◽  
Grinding Process ◽  
Geometric Characteristics ◽  
Abrasive Grains ◽  
Flexible Parts

The object of the present study is to investigate the dynamic of plane grinding by the tool with random distribution of abrasive grains, owning random geometric characteristics. The model is based on the consideration of machining system’s dynamical deformable characteristics, which have influence on the workpiece’s displacement under grinding process. The excitation of vibrations has significant effects on precision and surface quality, which is especially important in machining spatial parts, such as turbine blades.

Effect of Dry Ice Blasting on Removal of Loading Carbon Chips on Wheel Surface

2015 ◽  
Vol 656-657 ◽  
pp. 220-225 ◽  
Author(s):  
Kazuhito Ohashi ◽  
Soziro Murakawa ◽  
Shinya Tsukamoto
Keyword(s):  
Diamond Wheel ◽  
Working Environment ◽  
Wheel Surface ◽  
Dry Ice ◽  
Removal Method ◽  
Abrasive Grains ◽  
Grinding Performance ◽  
Dry Grinding ◽  
Dry Ice Blasting ◽  
The Impact

In dry grinding of hard carbon parts, the grinding performance of wheel is remarkably lost by carbon chips loading on wheel surface. The deterioration in grinding performance of wheel affects the grinding accuracy and efficiency. Generally, the grinding performance of loading wheel recovers by dressing. However, the dressing is not suitable from a viewpoint of the wheel life and the production cost because many abrasive grains having sharp edges under loading carbon chips on wheel surfaces are lost by dressing. In this study, we propose the application of dry ice blasting as a removal method of loading carbon chips. The dry ice is little influence on the working environment because of the quick sublimation of dry ice particles to carbon dioxide. In addition, the dry ice blasting might be suitable for the chip removal method because the dry ice doesn’t remain on wheel surfaces after blasting without the damage of wheel surfaces. The dry ice blasting tests of resinoid bond diamond wheel surface with no grinding performance by loading carbon chips are carried out, and the effects of dry ice blasting on removal of loading carbon chips are investigated, analyzing the protrusion height of abrasive grains, the impact pressure in the dry ice blasting and so on.

Grinding Performance of Metal-Bonded CBN Wheels with Regular Pores

2012 ◽  
Vol 217-219 ◽  
pp. 1857-1862 ◽  
Author(s):  
Cheng Jie Song ◽  
Wen Feng Ding ◽  
Jiu Hua Xu ◽  
Zhen Zhen Chen
Keyword(s):  
Grinding Force ◽  
Ti Alloy ◽  
Grinding Forces ◽  
Dressing Method ◽  
Specific Grinding Energy ◽  
Abrasive Grains ◽  
Working Layer ◽  
Nickel Based Superalloy ◽  
Grinding Performance ◽  
Vitrified Cbn

Metal-bonded cBN wheels with regular pores were fabricated using Cu-Sn-Ti alloy, cBN abrasive grains and alumina (Al2O3) bubble particles. Dressing experiments were carried out through rotary dressing method. Subsequently, grinding experiments were conducted on nickel-based superalloy GH4169. Comparative grinding performance was evaluated with vitrified cBN wheels in terms of grinding force and specific grinding energy. The results reveal that the pores in the working layer of the cBN wheels are exposed after rotary dressing. Compared to vitrified cBN wheels, grinding forces and specific grinding energy of the newly developed cBN wheels with regular pores are smaller.

The Possibility of Dressless Restoration of Grindactivity in Dry Grinding of Carbon

2008 ◽  
Vol 389-390 ◽  
pp. 356-361 ◽  
Author(s):  
Kazuhito Ohashi ◽  
Y. Sumimoto ◽  
Y. Fujita ◽  
Hiroyuki Hasegawa ◽  
Shinya Tsukamoto
Keyword(s):  
Adhesive Tape ◽  
Hard Carbon ◽  
Wheel Surface ◽  
Removal Method ◽  
Abrasive Grains ◽  
Abrasive Grain ◽  
Grinding Performance ◽  
Dry Grinding

The grinding performance of wheel remarkably decreases by the loading of wheel surface in dry grinding of hard carbon parts. In this report, we propose the removal method of loaded carbon chips in which an adhesive tape is removed with carbon chips after putting on a loaded wheel surface by an elastic roller with the setting load . The removal characteristics are experimentally investigated by analyzing the projecting height of abrasive grains, removal force of adhesive tape and so on. The removal method results in the enough projecting height of abrasive grain.

Efficiency Investigation of Removal of Loading Carbon Chips on Wheel Surface Using Dry Ice Blasting

2017 ◽  
Vol 749 ◽  
pp. 124-129
Author(s):  
Yuki Ohta ◽  
Soziro Murakawa ◽  
Kazuhito Ohashi
Keyword(s):  
High Efficiency ◽  
Diamond Wheel ◽  
Working Environment ◽  
Wheel Surface ◽  
Dry Ice ◽  
Abrasive Grains ◽  
Grinding Performance ◽  
Dry Grinding ◽  
Sharp Edges ◽  
Dry Ice Blasting

In dry grinding of hard carbon parts, the loading by carbon chips on wheel surface occurs in early grinding process, and the grinding performance of wheel is extremely declined. The deterioration affects the grinding accuracy and efficiency. Therefore, loading is one of the problems that must be resolved for high efficiency and high quality grinding of carbon. Generally, the grinding performance of wheel is recovered by the dressing. However, it’s not suitable from a viewpoint of the wheel life and the production cost because available abrasive grains possessing sharp edges under loading carbon chips on wheel surface are lost by dressing. In this study, we propose the dry ice blasting for removing loading carbon chips on wheel surface. The dry ice particles impact on pressed carbon chips with high pressure and sublimate to carbon dioxide quickly. Therefore, it is little influence on working environment because the dry ice doesn’t remain on wheel surfaces after blasting without the damage. In this report, we carry out the blasting tests of resinoid bond diamond wheel surface without grinding performance by loading carbon chips, and analyzed the effect of nozzle processing speed and nozzle feed pitch on recovering abrasive protrusion. The effective dry ice blasting conditions are investigated for high efficiency removal of loading carbon chips, analyzing the protrusion height of abrasive grains.

High Speed Grinding of Silicon Nitride With Electroplated Diamond Wheels: I — Wear and Wheel Life

1999 ◽  
Author(s):  
T. W. Hwang ◽  
C. J. Evans ◽  
E. P. Whitenton ◽  
S. Malkin
Keyword(s):  
Silicon Nitride ◽  
High Speed ◽  
Removal Rate ◽  
Chip Thickness ◽  
Progressive Increase ◽  
Wheel Wear ◽  
Abrasive Grains ◽  
Grinding Performance ◽  
Wheel Topography ◽  
High Speed Grinding

Abstract An investigation is reported on high speed grinding of silicon nitride using electroplated single-layered diamond wheels. The present paper is concerned with wheel wear and wheel life, and a second paper (Hwang et al., in press) with wheel topography and grinding mechanisms. It has been suggested that grinding performance may be enhanced at higher wheel speeds due to a reduction in the undeformed chip thickness. Grinding experiments were conducted at wheel speeds of 85 m/s and 149 m/s with the same removal rate. Contrary to expectations, the faster wheel speed gave no improvements in surface finish, grinding ratio, or wheel life. Microscopic observations of the wheel surface revealed dulling of the abrasive grains by attritious wear, thereby causing a progressive increase in the forces and energy until the end of the useful wheel life. For all grinding conditions, a single-valued relationship was found between the wheel wear and the accumulated sliding length between the abrasive grains and the workpiece. A longer wheel life and improved grinding performance can be obtained when the operating parameters are selected so as to reduce the abrasive sliding length per unit volume of material removal.

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