Improvement of Grindactivity by Dressless Wheel Treatment in Dry Grinding of Carbon

2009 ◽  
Vol 76-78 ◽  
pp. 94-100 ◽  
Author(s):  
Kazuhito Ohashi ◽  
Y. Sumimoto ◽  
Y. Fujita ◽  
Shinya Tsukamoto
Keyword(s):  
Surface Roughness ◽  
Adhesive Tape ◽  
Hard Carbon ◽  
Wheel Surface ◽  
Dry Grinding ◽  
Stock Removal

The grindactivity of wheel is remarkably lost by the loading of wheel surface in dry grinding of hard carbon parts. In this report, we propose the dressless wheel treatment, in which loading chips are removed with adhesive tape, and experimentally investigate its effect on recovery of grindactivity, analyzing the stock removal, the grinding current and the surface roughness in repeat of grinding cycle with treated and non-treated wheels. The removal and finishing performances of loaded wheel are recovered by the dressless wheel treatment.

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.

Investigation on Surface Grinding of Ti-6Al-4V Using Minimum Quantity Lubrication

2012 ◽  
Vol 500 ◽  
pp. 308-313 ◽  
Author(s):  
Guo Qiang Guo ◽  
Zhi Qiang Liu ◽  
Xiao Hu Zheng ◽  
Ming Chen
Keyword(s):  
Surface Roughness ◽  
Plastic Deformation ◽  
Surface Morphology ◽  
Specific Energy ◽  
Minimum Quantity Lubrication ◽  
Grinding Force ◽  
Dry Grinding ◽  
Surface Damages ◽  
Side Flow ◽  
Mql System

This paper investigates the effects of MQL system on the grinding performance of Ti-6Al-4V using SiC abrasive, the evaluation of the performance consisted of analyzing the grinding force, surface roughness and surface morphology. The experiment result indicated that the favorable lubricating effect of MQL oil makes it has the lowest value of grinding force, specific energy and force raito. MQL has better surface finish than dry grinding and fluid grinding has the lowest value of surface roughness under different grinding depth. Surface damages such as: side flow, plastic deformation, redeposition are present in dry and fluid grinding. As grinding depth increased, the damages become much more severe. But in MQL condition, it gives better surface integrity than dry and fluid grinding.

Surface roughness of peeled adhesive tape: A mystery?

2010 ◽  
Vol 92 (4) ◽  
pp. 46001 ◽  
Author(s):  
B. N. J. Persson ◽  
A. Kovalev ◽  
M. Wasem ◽  
E. Gnecco ◽  
S. N. Gorb
Keyword(s):  
Surface Roughness ◽  
Adhesive Tape

Particle detachment due to wheel rotation

2020 ◽  
pp. 1420326X2093516
Author(s):  
Jinwei Song ◽  
Hua Qian ◽  
Xiaohong Zheng
Keyword(s):  
Surface Roughness ◽  
Silicon Dioxide ◽  
Adhesion Force ◽  
Aluminium Oxide ◽  
Theoretical Models ◽  
Wheel Speed ◽  
Spherical Particles ◽  
Wheel Surface ◽  
Particle Detachment ◽  
Oxide Particles

Particle detachment induced by a rotating wheel was investigated theoretically and experimentally. The developed theoretical models were used to reveal how the particle detaches from a wheel surface to the surrounding air. The corresponding experiments were carried out to validate proposed models. Two groups of spherical particles were considered, i.e. silicon dioxide and aluminium oxide particles. Different forces and force moments acting on individual particles were analysed. The criteria for the rolling detachment of particles were considered. The detachment diameters under various conditions were calculated. The results show that the particle detachment was dominated by the removal and resistant forces acting on particles, including the gravity force, adhesion force, hydrodynamic force and centrifugal force. Different relevant parameters can affect particle detachment through these forces, including surface roughness, wheel speed, particle size and properties. A higher wheel speed, larger particle sizes and higher wheel surface roughness were shown to have a conducive influence on particle detachment. The resistant and removal force moments could be affected by the particle properties at the same time; therefore, the detachment diameters of the aluminium oxide particles are similar to those of silicon dioxide. This study can contribute towards the estimation of particle emissions from vehicles.

scholarly journals Optimization of Wet Grinding Conditions of Sheets Made of Stainless Steel

2020 ◽  
Vol 4 (4) ◽  
pp. 114
Author(s):  
Akira Mizobuchi ◽  
Atsuyoshi Tashima
Keyword(s):  
Surface Roughness ◽  
Stainless Steel ◽  
Rotational Speed ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Steel Sheets ◽  
Wet Grinding ◽  
Grinding Fluid ◽  
Dry Grinding ◽  
Grinding Conditions

This study addresses the wet grinding of large stainless steel sheets, because it is difficult to subject them to dry grinding. Because stainless steel has a low thermal conductivity and a high coefficient of thermal expansion, it easily causes grinding burn and thermal deformation while dry grinding on the wheel without applying a cooling effect. Therefore, wet grinding is a better alternative. In this study, we made several types of grinding wheels, performed the wet grinding of stainless steel sheets, and identified the wheels most suitable for the process. As such, this study developed a special accessory that could be attached to a wet grinding workpiece. The attachment can maintain constant pressure, rotational speed, and supply grinding fluid during work. A set of experiments was conducted to see how some grinding wheels subjected to some grinding conditions affected the surface roughness of a workpiece made of a stainless steel sheet (SUS 304, according to Japanese Industrial Standards: JIS). It was found that the roughness of the sheet could be minimized when a polyvinyl alcohol (PVA) grinding wheel was used as the grinding wheel and tap water was used as the grinding fluid at an attachment pressure of 0.2 MPa and a rotational speed of 150 rpm. It was shown that a surface roughness of up to 0.3 μm in terms of the arithmetic average height could be achieved if the above conditions were satisfied during wet grinding. The final surface roughness was 0.03 μm after finish polishing by buffing. Since the wet grinding of steel has yet to be studied in detail, this article will serve as a valuable reference.

Development of Polishing Fluids for Titanium Alloy Using Lapping Tape – Effects of Components in the Polishing Fluids on Polishing Characteristics –

2013 ◽  
Vol 7 (3) ◽  
pp. 300-305
Author(s):  
Hideyuki Tomoda ◽  
◽  
Koichi Kitajima ◽  
Keyword(s):  
Surface Roughness ◽  
Titanium Alloy ◽  
Fatty Acid ◽  
Carbon Number ◽  
Surfactant Solution ◽  
Chain Fatty Acid ◽  
Long Chain Fatty Acid ◽  
Potassium Oleate ◽  
Stock Removal ◽  
Polishing Fluid

To polish to hard-to-cut titanium alloy (Ti-6Al-4V), a method employing a lapping tape is proposed and titanium alloy polishing fluids are developed. The effects of each of the components of a soluble polishing fluid on the polishing characteristics, such as surface roughness, tangential polishing resistance, and stock removal, are investigated through experiments. The results indicate that polishing only with a potassium oleate solution, which is a long-chain fatty acid solution, creates the best surface. A fatty acid is focused on, and the effects on the polishing characteristics of changing the carbon number are studied. As a result, it is found that surface roughness can be suppressed when titanium alloy is polished with only a fatty acid surfactant solution of carbon number 12 or higher.

The Performance and Optimization of Slurry on the Double Sided Polishing Process of Silicon Wafer

2007 ◽  
Vol 359-360 ◽  
pp. 324-328
Author(s):  
Wei Li ◽  
Gang Xiang Hu ◽  
Xiao Dong Hu ◽  
Xiao Zhen Hu
Keyword(s):  
Surface Roughness ◽  
Silicon Wafer ◽  
Process Parameters ◽  
Ph Value ◽  
Removal Rate ◽  
Polished Surface ◽  
Polishing Process ◽  
Stock Removal

This study compares the effectiveness of different polishing slurries for Double Sided Polishing process of Silicon wafer in the polished surface roughness and stock removal rate, discusses the mechanism of Double Sided Polishing for silicon wafer with different type slurries, also the influence of the pH value, temperature and concentration of the slurries are discussed in this paper. Furthermore, by the optimization of the process parameters, the ultra-smooth of polished surface of silicon wafer has been got with higher efficient.

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.

Cylindrical Grinding by Structured Wheels

2016 ◽  
Vol 874 ◽  
pp. 101-108 ◽  
Author(s):  
Amir Daneshi ◽  
Bahman Azarhoushang
Keyword(s):  
Surface Roughness ◽  
Ground Surface ◽  
Promising Method ◽  
Grinding Wheel ◽  
Grinding Wheels ◽  
Grinding Forces ◽  
Cylindrical Grinding ◽  
Dry Grinding

Structuring of the grinding wheels is a promising method to reduce the forces involved in grinding, especially during dry grinding. In this paper, one of the methods of grinding wheel structuring is presented. The structuring process was modeled to find the corresponding dressing parameters for the desired structure dimensions. The cylindrical grinding operation with the structured wheels was simulated to produce a spiral free ground surface. Afterwards, the dry grinding experiments with the structured and non-structured wheels were carried out to evaluate the efficiency of the structured wheels. The results revealed that the grinding forces can be reduced by more than 50% when the grinding wheels are structured, while the surface roughness values increase by 80%.

scholarly journals Modification of 3D active wheel surface structure

Mechanik ◽  
2017 ◽  
Vol 90 (10) ◽  
pp. 900-902
Author(s):  
Rafał Świercz ◽  
Józef Zawora ◽  
Lucjan Dąbrowski ◽  
Mieczysław Marciniak
Keyword(s):  
Surface Roughness ◽  
Surface Structure ◽  
Grinding Process ◽  
Wheel Surface ◽  
Model Based ◽  
Ceramic Bond ◽  
The Face ◽  
Face Grinding

The investigation has been carried out into the effect of modifying the active wheel surface structure in view of enhancing productivity of the grinding process. This undertaking should be consistent with standard surface roughness requirements. This modification involves the model-based shares of the two SiC grain grit sizes and two CrA grit sizes in the grinding pins with ceramic bond for the face grinding process.

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